阅读说明：本技术 一种近接运营线微扰动注浆加固施工方法 (Micro-disturbance grouting reinforcement construction method for proximity operation line ) 是由 李展峰 杨鑫 陆跃 程桂芝 孙顺熹 王国正 郑久常 陶路路 陈华军 于 2021-08-12 设计创作，主要内容包括：本发明公开了一种近接运营线微扰动注浆加固施工方法,包括如下步骤：1)施工准备；2)定位装置的安装；3)钻取导孔；4)打设注浆管；5)注浆作业。本发明通过压力传感器可以实时感应地内压力,控制注浆过程,保障地内压力平衡,降低对地层扰动,而且整个喷浆过程自动化控制,避免人为操作的误差,加固效果好,质量有保障,并且在注浆管的打入地面的过程中始终通过定位装置进行导向限位,保证注浆管打入过程中的垂直度,有效避免注浆管的倾斜,提高实际的施工质量,而且在注浆完成后可以将定位装置拆卸进行重复利用,从而有效节约施工成本。(The invention discloses a micro-disturbance grouting reinforcement construction method for an adjacent operation line, which comprises the following steps: 1) construction preparation; 2) mounting a positioning device; 3) drilling a guide hole; 4) arranging a grouting pipe; 5) and (6) grouting operation. The invention can sense the ground internal pressure in real time through the pressure sensor, control the grouting process, ensure the balance of the ground internal pressure, reduce the disturbance to the stratum, automatically control the whole grouting process, avoid the error of manual operation, have good reinforcing effect and ensure the quality, and guide and limit through the positioning device all the time in the process of driving the grouting pipe into the ground, ensure the verticality in the driving process of the grouting pipe, effectively avoid the inclination of the grouting pipe, improve the actual construction quality, and can disassemble the positioning device for recycling after the grouting is finished, thereby effectively saving the construction cost.)

1. A micro-disturbance grouting reinforcement construction method for an adjacent operation line is characterized by comprising the following steps: the method comprises the following steps:

1) construction preparation: cleaning a construction area according to a construction plan, leveling a construction site, accurately lofting a concrete position of a pile position, and marking;

2) installing a positioning device:

(1) installing guide rails on two sides of the pile position according to design requirements, wherein the guide rails on the two sides are horizontally and symmetrically arranged;

(2) the bottom supports are respectively arranged on the two guide rails and comprise a base and a moving seat, the moving seat slides on the base in a limiting mode and is fixed with the base in a limiting mode through a first set screw, two clamping plates which are horizontally and symmetrically distributed are arranged at the bottom of the base, a clamping groove is formed between the two clamping plates and the base, the base is connected to the guide rails in a sliding and clamping mode through the clamping groove, and meanwhile moving idler wheels at the bottom of the moving seat are just located in sliding grooves of the guide rails;

(3) the two bottom supports are respectively provided with a top support, each top support comprises a bracket and a guide rod, the two ends of the top of each bracket are respectively provided with a branch frame, the guide rods are clamped in dovetail chutes at the tops of the branch frames in a sliding manner, the guide rods are fixed with the branch frames in a limiting manner through second set screws, and the brackets are clamped in a clamping frame groove in the middle of the movable seat in a matching manner;

(4) installing a guide plate between the two top supports, moving the bottom support along the guide rail so as to synchronously adjust the top supports, enabling positioning grooves at two ends of the guide plate to be just correspondingly clamped on guide columns at the middle parts of brackets of the two top supports, simultaneously enabling the guide plate to be just butted and pressed on the brackets, screwing a fastening nut into the end part of each guide column, but not screwing the fastening nut;

(5) the two arc guide frames are respectively arranged on the two top supports and are oppositely arranged, the arc guide frames are arranged on the corresponding top supports through the supporting columns, firstly, the arc guide frames are placed on the guide plate, the positions of the arc guide frames are adjusted, the hole reserved on the arc guide frame corresponds to the hole reserved on the guide plate, and the arc guide frame is fixed with the guide plate through the bolt component, so that the arc guide surface on the arc guide frame corresponds to the guide groove in the middle of the guide plate, then the supporting column passes through a limiting frame at the top of a guide rod on the top support, the guide plate moves along the supporting column to drive the arc guide frame to adjust the position while the supporting column passes through the limiting frame, so that the supporting column passes through the limiting frame and the limiting groove at the end part of the arc guide frame, the length of the two ends of the supporting column is adjusted, the length error of the two extending ends of the supporting column is controlled to be 1-8mm, and the limiting frame and the supporting column are fixed through screws;

(6) installing a sleeve, clamping the sleeve into a guide groove of a guide plate, enabling extension blocks on two sides of the sleeve to correspond to two arc guide frames, enabling a first inserted rod on each extension block to be just inserted into a first inserted hole of each arc guide frame, enabling a second inserted rod on each arc guide frame to be just inserted into a second inserted hole of each extension block, and enabling a lower limit nut to be screwed into each first inserted rod and an upper limit nut to be screwed into each second inserted rod;

(7) a supporting plate is arranged in the sleeve, a expanding plate is arranged on the outer side of the sleeve, a positioning column is arranged on the expanding plate, a positioning through hole on the supporting plate corresponds to the positioning column, the supporting plate is sleeved on the positioning column, a positioning nut is screwed in the end part of the positioning column and is screwed tightly, so that the hole in the center of the supporting plate and the hole in the sleeve are on the same straight line, inserting a positioning pile rod into a hole in the center of the supporting plate, moving the positioning pile rod downwards until the positioning pile rod touches the ground, unscrewing a first set screw and a second set screw, moving an adjusting sleeve, driving the positioning pile rod to synchronously move by the sleeve until the bottom end of the positioning pile rod just moves to a pile position, screwing the first set screw, the second set screw and a fastening nut, fixing the base and the ground through a positioning hole reserved on the base and matched with a foundation screw, then taking down the positioning pile rod, and screwing down the positioning nut to dismount the supporting plate;

(8) unscrewing the upper limiting nut and the lower limiting nut, moving the knocking sleeve downwards along the guide arc surface and the guide groove until the bottom end of the sleeve is inserted into the ground by 10-25cm, and then screwing the upper limiting nut and the lower limiting nut;

3) drilling a guide hole: moving the drilling equipment to a proper position, enabling the bottom end of the drill rod to penetrate through the sleeve to be abutted against the construction ground, adjusting the position of the drill rod to enable the drill rod to move to a pile position, and drilling a grouting guide hole with the depth of 5-8m at the pile position;

4) and (3) arranging a grouting pipe:

(1) an inner guide sleeve is arranged in the sleeve, the aperture of a hole in the center of the inner guide sleeve is determined according to the outer diameter of the grouting pipe, the inner guide sleeve is inserted into the sleeve, the position of the inner guide sleeve is adjusted, a positioning through hole in the inner guide sleeve corresponds to the positioning column, the inner guide sleeve is connected to the positioning column in a clamping mode, and a positioning nut is screwed into the positioning column and screwed tightly;

(2) inserting a grouting pipe into the pre-drilled grouting guide hole through the inner guide sleeve, and then applying vertical pressure to the top end of the grouting pipe until the grouting pipe is buried to the specified hole depth;

5) grouting operation: high-pressure water and compressed air are conveyed into a grouting pipe through a pipeline, enter the soil body through the grouting pipe and cut the soil body, cement paste is conveyed into the grouting pipe through the pipeline by a slurry pump and sprayed into the soil body, a reinforced body is formed by solidification in the soil, the grouting pipe is pulled out while grouting is performed by pipe pulling equipment, a pressure sensor is further arranged at the bottom end of the grouting pipe, and underground pressure in the whole grouting process is sensed in real time through the pressure sensor.

2. The close-proximity operation line micro-disturbance grouting reinforcement construction method according to claim 1, characterized in that: and in the step 5), a sludge discharge port is formed in the bottom of the grouting pipe and communicated with the sludge discharge pipe inside the grouting pipe, so that the redundant mixture of air, water and cement slurry enters the sludge discharge pipe through the sludge discharge port at the bottom end of the grouting pipe and then enters the slurry treatment equipment above the ground through the sludge discharge pipe for centralized treatment.

Technical Field

The invention belongs to the technical field of grouting, and particularly relates to a micro-disturbance grouting reinforcement construction method for an adjacent operation line.

Background

With the encryption of urban rail transit network, the situations of dismantling and rebuilding of surrounding buildings and crossing of subway tunnels on railways and highways during subway operation are more and more, and it is more and more common to adopt bored concrete piles beside the existing subway tunnels to reinforce foundations. In the existing grouting reinforcement construction process, the influence on soil bodies is large, the soil bodies around grouting holes are easy to displace, and even hole wall collapse or hole shrinkage occurs. Therefore, how to solve the problem that the underground construction, especially the grouting process, has large disturbance to the bottom layer under the condition of large pressure, and further causes damage to underground structures, and causes the construction safety risk problem of the access operation line, is a problem to be solved urgently at present.

Disclosure of Invention

The invention aims to provide a technical scheme of a close-connection operation line micro-disturbance grouting reinforcement construction method aiming at the defects in the prior art, the design is reasonable, the ground internal pressure can be sensed in real time through a pressure sensor, the grouting process is controlled, the ground internal pressure balance is guaranteed, the disturbance to the stratum is reduced, the whole grouting process is automatically controlled, the error of manual operation is avoided, the reinforcement effect is good, the quality is guaranteed, the guide and the limit are always carried out through a positioning device in the process of driving a grouting pipe into the ground, the verticality in the driving process of the grouting pipe is guaranteed, the inclination of the grouting pipe is effectively avoided, the actual construction quality is improved, and the positioning device can be detached for repeated utilization after the grouting is finished, so that the construction cost is effectively saved.

In order to solve the technical problems, the invention adopts the following technical scheme:

a micro-disturbance grouting reinforcement construction method for an adjacent operation line comprises the following steps:

1) construction preparation: cleaning a construction area according to a construction plan, leveling a construction site, accurately lofting a concrete position of a pile position, and marking;

2) installing a positioning device:

(1) installing guide rails on two sides of the pile position according to design requirements, wherein the guide rails on the two sides are horizontally and symmetrically arranged; the two guide rails are installed according to the actual position of the pile position, the actual size of the positioning device and the like, so that the two guide rails are horizontally and symmetrically arranged relative to the pile position, the perpendicularity in the grouting pipe driving process can be conveniently controlled subsequently, the final pile forming quality is improved, the guide rails and the ground are directly installed and fixed, the installation firmness is ensured, and the supporting and guiding effects of the guide rails on other components are ensured;

(2) the bottom supports are respectively arranged on the two guide rails and comprise a base and a moving seat, the moving seat slides on the base in a limiting mode and is fixed with the base in a limiting mode through a first set screw, two clamping plates which are horizontally and symmetrically distributed are arranged at the bottom of the base, a clamping groove is formed between the two clamping plates and the base, the base is connected to the guide rails in a sliding and clamping mode through the clamping groove, and meanwhile moving idler wheels at the bottom of the moving seat are just located in sliding grooves of the guide rails; the whole structure design is ingenious and reasonable, the bottom support consists of a base and a movable seat, the movable seat is clamped on the base in a sliding mode and can adjust the position of the movable seat on the base, the base is adjusted in place and then limited and fixed through a first set screw, so that the whole structure stability and firmness of the whole bottom support are effectively ensured, the base forms a clamping groove through two clamping plates at the bottom, the base is clamped on the guide rail in a sliding mode and can adjust the actual position of the bottom support on the guide rail, meanwhile, when the base is clamped on the guide rail, the movable roller below the movable seat is just positioned in the guide rail, the movable roller can slide along the sliding groove in the adjusting process of the movable seat, and when the base and the movable seat are limited and fixed to form a whole, when the bottom support slides along the guide rail, the movable roller of the movable seat also slides along the sliding groove, the self-movement adjustment of the movable seat and the movement adjustment process of the whole bottom support are more convenient and simpler, and the actual adjustment operation is more convenient;

(3) the two bottom supports are respectively provided with a top support, each top support comprises a bracket and a guide rod, the two ends of the top of each bracket are respectively provided with a branch frame, the guide rods are clamped in dovetail chutes at the tops of the branch frames in a sliding manner, the guide rods are fixed with the branch frames in a limiting manner through second set screws, and the brackets are clamped in a clamping frame groove in the middle of the movable seat in a matching manner; each bottom support is correspondingly provided with a top support, the top support just corresponds to the clamping frame groove of the moving seat clamped on the bottom support through a bracket, so that the top support and the bottom support are accurately clamped and limited, the installation and the disassembly are convenient, the top support comprises a bracket and a guide rod, branch supports are arranged at two ends of the bracket, a guide rod is correspondingly clamped in a sliding way in a dovetail chute of each branch support, the guide rod can move along the dovetail chute and is fixed through a second set screw after the guide rod moves in place, so that the structural firmness and the stability of the whole assembled top support are effectively ensured, the position of a sleeve can be adjusted in an omnibearing manner by moving the guide rod in the dovetail chute in a matching manner with the moving adjustment of the moving seat and the bottom support, the hole center of the sleeve is moved to be consistent with the position of a pile position, and the accurate positioning of a positioning device and the pile position is realized, thereby facilitating the guiding and binding effect of the positioning device on the grouting pipe, ensuring the vertical downward movement of the grouting pipe and improving the final pile-forming quality;

(4) installing a guide plate between the two top supports, moving the bottom support along the guide rail so as to synchronously adjust the top supports, enabling positioning grooves at two ends of the guide plate to be just correspondingly clamped on guide columns at the middle parts of brackets of the two top supports, simultaneously enabling the guide plate to be just butted and pressed on the brackets, screwing a fastening nut into the end part of each guide column, but not screwing the fastening nut; the two top supports can be connected through the guide plate, the two top supports can be adjusted and positioned in an auxiliary mode at the same time, the two top supports are symmetrically distributed about a pile position, the guide plate is matched with the guide posts on the bracket through the positioning grooves at the two ends to achieve primary clamping and positioning with the two top supports, the two ends of the guide plate just butt against the bracket, after the fastening nut is screwed in subsequently, the connection firmness between the guide plate and the bracket can be ensured, the bracket can be pressed in the clamping frame groove in a limiting mode through the fastening nut, in the installation step, the fastening nut is only selected at the end portion of the guide post but is not screwed in the installation step, so that the subsequent installation, adjustment and positioning of other components can be facilitated, the overall installation process is reasonable, and the subsequent installation and adjustment are not affected;

(5) the two arc guide frames are respectively arranged on the two top supports and are oppositely arranged, the arc guide frames are arranged on the corresponding top supports through the supporting columns, firstly, the arc guide frames are placed on the guide plate, the positions of the arc guide frames are adjusted, the hole reserved on the arc guide frame corresponds to the hole reserved on the guide plate, and the arc guide frame is fixed with the guide plate through the bolt component, so that the arc guide surface on the arc guide frame corresponds to the guide groove in the middle of the guide plate, then the supporting column passes through a limiting frame at the top of a guide rod on the top support, the guide plate moves along the supporting column to drive the arc guide frame to adjust the position while the supporting column passes through the limiting frame, so that the supporting column passes through the limiting frame and the limiting groove at the end part of the arc guide frame, the length of the two ends of the supporting column is adjusted, the length error of the two extending ends of the supporting column is controlled to be 1-8mm, and the limiting frame and the supporting column are fixed through screws; the guide arc surfaces on the two guide arc frames are oppositely arranged to limit the guide sleeve, so that the subsequent sleeve can be conveniently guided to move downwards, when the guide arc guide frame is installed, the two guide arc frames are firstly installed on the guide plate, the guide arc frames and the guide plate are installed and fixed through the reserved holes and the bolt assemblies, the accurate installation and fixation between the guide arc frames and the guide plate are effectively ensured, then the guide arc frames and the corresponding top supports are connected through the support columns, the support columns penetrate through the limit frames at the tops of the top supports and the limit grooves on the guide arc frames, the guide arc frames and the top supports are indirectly positioned and connected, the guide arc frames are limited through the support columns, the guide plates are limited by the guide columns, the guide plates and the guide arc frames are mutually constrained, so that the accurate positioning between the guide arc frames and the corresponding top supports and the accurate positioning between the guide plates and the two top supports are effectively ensured, the installation and the disassembly are convenient and simple, meanwhile, the length of the two ends of the supporting column is controlled, so that the structural balance and the stability of the whole positioning device can be ensured as much as possible;

(6) installing a sleeve, clamping the sleeve into a guide groove of a guide plate, enabling extension blocks on two sides of the sleeve to correspond to two arc guide frames, enabling a first inserted rod on each extension block to be just inserted into a first inserted hole of each arc guide frame, enabling a second inserted rod on each arc guide frame to be just inserted into a second inserted hole of each extension block, and enabling a lower limit nut to be screwed into each first inserted rod and an upper limit nut to be screwed into each second inserted rod; the outer diameter of the sleeve corresponds to the guide groove in the center of the guide plate, the bottom of the sleeve is just clamped in the guide groove, and the upper part of the sleeve is also just in limited clamping in a limited space formed by two guide arc surfaces, so that the overall stability and verticality of the sleeve during installation are ensured;

(7) a supporting plate is arranged in the sleeve, a expanding plate is arranged on the outer side of the sleeve, a positioning column is arranged on the expanding plate, a positioning through hole on the supporting plate corresponds to the positioning column, the supporting plate is sleeved on the positioning column, a positioning nut is screwed in the end part of the positioning column and is screwed tightly, so that the hole in the center of the supporting plate and the center of the hole of the sleeve are on the same straight line, inserting a positioning pile rod into a hole in the center of the supporting plate, moving the positioning pile rod downwards until the positioning pile rod touches the ground, unscrewing a first set screw and a second set screw, moving an adjusting sleeve, driving the positioning pile rod to synchronously move by the sleeve until the bottom end of the positioning pile rod just moves to a pile position, screwing the first set screw, the second set screw and a fastening nut, fixing the base and the ground through a positioning hole reserved on the base and matched with a foundation screw, then taking down the positioning pile rod, and screwing down the positioning nut to dismount the supporting plate; the supporting plate is accurately positioned with the sleeve through the positioning column and the positioning through hole, the hole at the center of the supporting plate is ensured to be coaxial with the hole of the sleeve after installation, the supporting plate is limited and fixed through the positioning nut after being installed in place, the integral installation firmness of the supporting plate is effectively ensured, the positioning pile rod is inserted into the center of the supporting plate, the first fastening screw and the second fastening screw are loosened through screwing, and the fastening nut is not screwed, so that the position of the positioning pile rod can be adjusted in all directions, the bottom end of the positioning pile rod is just moved to the pile position, the center of the sleeve hole is ensured to be just positioned at the pile position, the subsequent guiding and limiting of the grouting pipe are facilitated, the verticality in the grouting pipe installing process is ensured, when the positioning pile rod is moved, the integral structural stability and firmness of the whole positioning device are ensured through screwing the first fastening screw, the second fastening screw and the fastening nut, the positioning pile rod cannot be moved and adjusted any more, so that accurate positioning of the sleeve is guaranteed, the base is further fixed through the positioning holes and the foundation screws, the structural strength of the whole device after the positioning pile rod is moved and adjusted in place is further guaranteed, the safety performance is improved, and the positioning pile rod and the supporting plate are taken down after the fixing, so that subsequent guide hole drilling and grouting pipe driving setting are not affected;

(8) unscrewing the upper limiting nut and the lower limiting nut, moving the knocking sleeve downwards along the guide arc surface and the guide groove until the bottom end of the sleeve is inserted into the ground by 10-25cm, and then screwing the upper limiting nut and the lower limiting nut; when the sleeve is moved in place, the sleeve is moved towards the ground, so that the bottom end of the sleeve is inserted into the ground for a certain length, the overall stability and verticality of the installed sleeve are ensured, and the installation firmness between the whole device and the ground is further improved;

3) drilling a guide hole: moving the drilling equipment to a proper position, enabling the bottom end of the drill rod to penetrate through the sleeve to be abutted against the construction ground, adjusting the position of the drill rod to enable the drill rod to move to a pile position, and drilling a grouting guide hole with the depth of 5-8m at the pile position; the subsequent grouting pipe can be conveniently arranged by drilling the grouting guide hole with the depth of 5-8m, the aperture of the casing pipe is large, a space can be reserved for the adjustment drilling of the drill rod, the design is reasonable and ingenious, the drilled hole corresponds to the pile position, the formed grouting guide hole is just positioned at the designed pile position, the center of the casing pipe is also just positioned at the pile position, and therefore the correspondence between the casing pipe and the grouting guide hole is ensured;

4) and (3) arranging a grouting pipe:

(1) an inner guide sleeve is arranged in the sleeve, the aperture of a hole in the center of the inner guide sleeve is determined according to the outer diameter of the grouting pipe, the inner guide sleeve is inserted into the sleeve, the position of the inner guide sleeve is adjusted, a positioning through hole in the inner guide sleeve corresponds to the positioning column, the inner guide sleeve is clamped on the positioning column through the positioning through hole, and a positioning nut is screwed into the positioning column and screwed tightly; the inner guide sleeve is adjusted and replaced according to the actual outer diameter size of the grouting pipe, the central aperture of the inner guide sleeve is ensured to be just matched with the outer diameter of the grouting pipe, so that the limiting guide of the grouting pipes with different pipe diameters is realized, the verticality of the grouting pipe is limited and guided through the positioning device, the verticality in the grouting pipe setting process is ensured, and the pile forming quality is ensured;

(2) inserting a grouting pipe into the pre-drilled grouting guide hole through the inner guide sleeve, and then applying vertical pressure to the top end of the grouting pipe until the grouting pipe is buried to the specified hole depth; in the process of driving the grouting pipe, the grouting pipe is always limited and guided by the positioning device, so that the downward moving verticality of the grouting pipe in the process from the start of driving to the end of driving is ensured, the inclination deviation of the grouting pipe is effectively avoided, and the final pile forming quality is improved;

5) grouting operation: high-pressure water and compressed air are conveyed into a grouting pipe through a pipeline, enter the soil body through the grouting pipe and cut the soil body, cement paste is conveyed into the grouting pipe through the pipeline by a slurry pump and sprayed into the soil body, a reinforced body is formed by solidification in the soil, the grouting pipe is pulled out while grouting is performed by pipe pulling equipment, the bottom end of the grouting pipe is also provided with a pressure sensor, and the underground pressure in the whole grouting process is sensed in real time through the pressure sensor; adopt this mode to carry out the slip casting operation, both can guarantee the slip casting effect, reach the disturbance that reduces near tunnel soil layer simultaneously to according to the pressure size intelligent control slip casting process of pressure sensor response at the slip casting in-process, guarantee the balance of ground pressure, reduce the influence of whitewashing to the environment, reach the construction purpose of perturbation a little.

Further, the bottom of slip casting pipe is provided with the mud discharging port, the mud discharging port is linked together with the inside mud discharging pipe of slip casting pipe, make unnecessary air, the mixture of water and mud get into in the mud discharging pipe through the mud discharging port of slip casting bottom end, enter into the mud treatment facility of ground top through the mud discharging pipe again and carry out centralized processing, cooperate the slip casting pipe through the mud discharging port and get rid of unnecessary air, water and mud, and centralized collection processing, both can avoid the waste of resource, reduce cost, can avoid the slip casting process to cause the underground pressure anomaly and influence the underground structure, will unnecessary air, water and mud will be discharged, can control pressure, guarantee ground internal pressure balance, reduce the disturbance to the stratum, and whole slip casting process cooperation control system carries out automated control, avoid considering the error of operation, it is effectual to consolidate, the quality is secure.

Due to the adoption of the technical scheme, the invention has the following beneficial effects:

the invention has reasonable design, can sense the ground internal pressure in real time through the pressure sensor, control the grouting process, ensure the ground internal pressure balance, reduce the disturbance to the stratum, automatically control the whole grouting process, avoid the error of manual operation, have good reinforcing effect and ensure the quality, always guide and limit through the positioning device in the process of driving the grouting pipe into the ground, ensure the verticality of the grouting pipe in the driving process, effectively avoid the inclination of the grouting pipe, improve the actual construction quality, disassemble and recycle the positioning device after the grouting is finished, thereby effectively saving the construction cost, and set the bottom support into the base and the movable seat aiming at the installation of the positioning device, the whole bottom support can slide and adjust along the guide rail, the movable seat can move and adjust along the base, the top support is set into the bracket and the guide rod, the guide bar can move the regulation, and the deflector can cooperate the removal of guide bar to carry out synchronous motion again, thereby make the device can carry out comprehensive adjustment, make the sleeve pipe center at middle part move to with pile position unanimous, can reduce the installation precision and the degree of difficulty of device through multiple regulation, make the installation can have certain error range value, thereby the installation of the actual of being more convenient for is fixed, and the aperture of inner guide pin bushing can be adjusted according to the slip casting external diameter of reality, thereby make the device can be applicable to the constraint direction of the slip casting pipe of different pipe diameters, guarantee the straightness that hangs down of slip casting pipe, application scope is extensive, therefore, the clothes hanger is strong in practicability.

Drawings

The invention will be further described with reference to the accompanying drawings in which:

FIG. 1 is a structural schematic view of the present invention in a state after the bottom support is installed;

FIG. 2 is a schematic structural view of the present invention in a state after the top support is installed;

FIG. 3 is a schematic structural view of the present invention in a state where the guide plate is installed;

FIG. 4 is a structural diagram of the present invention in a state after the arc guide frame is installed;

FIG. 5 is a structural diagram of the present invention in a state after the casing is installed;

FIG. 6 is a schematic structural view of the present invention in a state of positioning adjustment between the positioning device and the pile;

FIG. 7 is a structural diagram of the present invention in a state where the positioning device and the pile position are adjusted in place;

FIG. 8 is a schematic structural view of the inner guide sleeve in a mounted state;

FIG. 9 is a schematic view of the position structure of the inner guide sleeve in the sleeve of the present invention;

FIG. 10 is a schematic view of the construction of the bottom support of the present invention;

FIG. 11 is a schematic view of the mounting structure of the base and the movable base according to the present invention;

FIG. 12 is a schematic view of the bottom support and guide rail assembly of the present invention;

FIG. 13 is a schematic view of the construction of the top support of the present invention;

FIG. 14 is a schematic view of the structure of the guide plate according to the present invention;

FIG. 15 is a schematic structural view of the sleeve of the present invention;

FIG. 16 is a schematic structural view of an arc runner according to the present invention;

FIG. 17 is a schematic structural view of the inner guide sleeve according to the present invention;

fig. 18 is a schematic view of the installation structure of the spud-bar and the supporting plate according to the present invention.

In the figure: 1-a chute; 2-a guide rail; 3-bottom support; 4-a base; 5-moving the seat; 6-a first set screw; 7-clamping plate; 8-a clamping groove; 9-moving the roller; 10-top support; 11-a bracket; 12-a guide bar; 13-a branch frame; 14-dovetail chutes; 15-a second set screw; 16-a limit frame; 17-a guide plate; 18-a positioning groove; 19-a guide post; 20-fastening a nut; 21-arc guide frame; 22-a bolt assembly; 23-a guiding arc surface; 24-a guide groove; 25-a limit groove; 26-a cannula; 27-an extension block; 28-a first plunger; 29-a first receptacle; 30-a second plunger; 31-a second receptacle; 32-a card frame groove; 33-inner guide sleeve; 34-positioning holes; 35-a support column; 36-upper limit nut; 37-a lower limit nut; 38-a locating post; 39-expanding the plate; 40-positioning the pile rod; 41-a support plate; 42-a positioning nut; 43-positioning the perforations.

Detailed Description

As shown in fig. 1 to 18, the method for micro-disturbance grouting reinforcement construction of an adjacent operation line of the present invention comprises the following steps:

1) construction preparation: cleaning a construction area according to a construction plan, leveling a construction site, accurately lofting a concrete position of a pile position, and marking;

2) installing a positioning device:

(1) installing guide rails 2 on two sides of the pile position according to design requirements, wherein the guide rails 2 on the two sides are horizontally and symmetrically arranged; the two guide rails 2 are installed according to the actual position of the pile position, the actual size of the positioning device and the like, so that the two guide rails 2 are horizontally and symmetrically arranged relative to the pile position, the perpendicularity in the grouting pipe driving process can be conveniently controlled subsequently, the final pile forming quality is improved, the guide rails 2 are directly installed and fixed with the ground, the installation firmness is ensured, and the supporting and guiding effects of the guide rails 2 on other components are ensured;

(2) the two guide rails 2 are respectively provided with a bottom support 3, each bottom support 3 comprises a base 4 and a moving seat 5, the moving seat 5 slides on the base 4 in a limiting manner, the moving seat 5 is fixed with the base 4 in a limiting manner through a first set screw 6, two clamping plates 7 which are horizontally and symmetrically distributed are arranged at the bottom of the base 4, a clamping groove 8 is formed between each clamping plate 7 and the base 4, the base 4 is connected to the guide rails 2 in a sliding manner through the clamping groove 8, and meanwhile, moving rollers 9 at the bottom of the moving seat 5 are just positioned in sliding grooves 1 of the guide rails 2; the whole structure design is ingenious and reasonable, the bottom support 3 is composed of a base 4 and a movable seat 5, the movable seat 5 is clamped on the base 4 in a sliding manner, the position of the movable seat 5 on the base 4 can be adjusted, meanwhile, the base 4 is limited and fixed through a first set screw 6 after being adjusted in place, so that the whole structure stability and firmness of the whole bottom support 3 are effectively ensured, the base 4 is formed into a clamping groove 8 through two clamping plates 7 at the bottom, the clamping groove 8 is formed by the base 4, the sliding clamping is connected on the guide rail 2, the actual position of the bottom support 3 on the guide rail 2 can be adjusted, meanwhile, when the base 4 is clamped on the guide rail 2, the movable roller 9 below the movable seat 5 is just positioned in the guide rail 2, so that the movable roller 9 can slide along the sliding groove 1 in the self adjusting process of the movable seat 5, and the base 4 and the movable seat 5 are limited and fixed to form a whole, when the bottom support 3 slides along the guide rail 2, the moving roller 9 of the moving seat 5 also slides along the sliding chute 1, so that the moving adjustment of the moving seat 5 and the moving adjustment process of the whole bottom support 3 are more convenient and simpler, and the actual adjustment operation is more convenient;

(3) the two bottom supports 3 are respectively provided with a top support 10, each top support 10 comprises a bracket 11 and a guide rod 12, two ends of the top of each bracket 11 are respectively provided with a branch frame 13, each guide rod 12 is clamped in a dovetail sliding groove 14 at the top of each branch frame 13 in a sliding manner, each guide rod 12 is fixed with each branch frame 13 in a limiting manner through a second set screw 15, and each bracket 11 is clamped in a clamping frame groove 32 in the middle of the corresponding movable seat 5 in a matching manner; a top support 10 is correspondingly installed on each bottom support 3, the top support 10 just corresponds to the clamping frame groove 32 of the moving seat 5 of the bottom support 3 through a bracket 11, so that accurate clamping limiting of the top support 10 and the bottom support 3 is realized, the installation and the disassembly are convenient, the top support 10 comprises a bracket 11 and a guide rod 12, branch frames 13 are arranged at two ends of the bracket 11, a guide rod 12 is correspondingly and slidably clamped in a dovetail chute 14 of each branch frame 13, the guide rod 12 can move along the dovetail chute 14 and is fixed through a second fastening screw 15 after the guide rod 12 is moved in place, so that the structural firmness and the stability of the whole assembled top support 10 are effectively ensured, the moving of the guide rod 12 in the dovetail chute 14 is matched with the moving adjustment of the moving seat 5 and the bottom support 3, and the omnibearing adjustment of the position of a sleeve can be realized, the hole center of the sleeve is moved to be consistent with the position of the pile position, so that the positioning device and the pile position are accurately positioned, the positioning device can conveniently guide and constrain the grouting pipe, the vertical downward movement of the grouting pipe is ensured, and the final pile forming quality is improved;

(4) installing a guide plate 17 between the two top supports 10, moving the bottom support 3 along the guide rail 2 so as to synchronously adjust the top supports 10, so that positioning grooves 18 at two ends of the guide plate 17 are just correspondingly clamped on guide columns 19 in the middle parts of the brackets 11 of the two top supports 10, meanwhile, the guide plate 17 is just pressed against the brackets 11, and then fastening nuts 20 are screwed into the end parts of the guide columns 19, but the fastening nuts 20 are not screwed; the two top supports 10 can be connected through the guide plate 17, the two top supports 10 can be adjusted and positioned in an auxiliary mode at the same time, the two top supports 10 are symmetrically distributed about a pile position, the guide plate 17 is matched with the guide columns 19 on the bracket 11 through the positioning grooves 18 at the two ends, primary clamping and positioning with the two top supports 10 are achieved, the two ends of the guide plate 17 just abut against the bracket 11, after the fastening nuts 20 are screwed subsequently, the connection firmness between the guide plate 17 and the bracket 11 can be guaranteed, the bracket 11 can be pressed in the clamping frame groove 32 in a limiting mode through the fastening nuts 20, and only the fastening nuts 20 are selected at the end portions of the guide columns 19 in the installation step and are not screwed, so that the subsequent installation, adjustment and positioning of other components can be facilitated, the overall installation process is reasonable, and the subsequent installation and adjustment are not influenced;

(5) the two top supports 10 are respectively provided with an arc guide frame 21, the two arc guide frames 21 are oppositely arranged, the arc guide frames 21 are arranged on the corresponding top supports 10 through supporting columns 35, firstly, the arc guide frames 21 are placed on the guide plates 17, the positions of the arc guide frames 21 are adjusted, holes reserved on the arc guide frames 21 correspond to holes reserved on the guide plates 17, then, the arc guide frames 21 and the guide plates 17 are fixed through bolt assemblies 22, so that arc guide surfaces 23 on the arc guide frames 21 correspond to guide grooves 24 in the middle of the guide plates 17, then, the supporting columns 35 penetrate through a limiting frame 16 at the top of a guide rod 12 on the top supports 10, when the supporting columns 35 penetrate through the limiting frame 16, the guide plates 17 move along the supporting columns 35 to drive the arc guide frames 21 to adjust the positions, so that the supporting columns 35 penetrate through limiting grooves 25 at the end parts of the arc guide frames 21 while penetrating through the limiting frame 16, and then, the extending lengths of the two ends of the supporting columns 35 are adjusted, the length error of the two ends of the supporting column 35 is controlled to be 1-8mm, and the limiting frame 16 and the supporting column 35 are fixed through screws; the arc guide surfaces 23 on the two arc guide frames 21 are oppositely arranged to limit the guide sleeve 26, so that the subsequent guide of the sleeve 26 can be conveniently moved downwards, when the arc guide frames are installed, the two arc guide frames 21 are installed on the guide plate 17 firstly, the arc guide frames 21 and the guide plate 17 are installed and fixed through the reserved hole matched bolt assembly 22, the accurate installation and fixation between the arc guide frames 21 and the guide plate 17 are effectively ensured, then the arc guide frames 21 and the corresponding top supports 10 are connected through the supporting columns 35, the supporting columns 35 penetrate through the limiting frames 16 at the tops of the top supports 10 and simultaneously penetrate through the limiting grooves 25 on the arc guide frames 21, the arc guide frames 21 and the top supports 10 are indirectly positioned and connected, the arc guide frames 21 are limited through the supporting columns 35, meanwhile, the guide plate 17 is limited by the guide columns 19, the guide plate 17 and the arc guide frames 21 are mutually drawn, and accordingly, accurate positioning between the arc guide frames 21 and the corresponding top supports 10 is effectively ensured, The guide plate 17 and the two top supports 10 are accurately positioned, the installation and the disassembly are convenient and simple, and the length of the two ends of the support column 35 is controlled, so that the structural balance and the stability of the whole positioning device can be ensured as much as possible;

(6) installing a sleeve 26, clamping the sleeve 26 into the guide groove 24 of the guide plate 17, wherein extension blocks 27 on two sides of the sleeve 26 correspond to the two arc guide frames 21, a first insert rod 28 on the extension block 27 is just inserted into a first insert hole 29 of the arc guide frame 21, a second insert rod 30 on the arc guide frame 21 is just inserted into a second insert hole 31 of the extension block 27, a lower limit nut 37 is screwed into the first insert rod 28, and an upper limit nut 36 is screwed into the second insert rod 30; the outer diameter of the sleeve 26 corresponds to the guide groove 24 in the center of the guide plate 17, the bottom of the sleeve 26 is just clamped in the guide groove 24, and the upper part of the sleeve 26 is also just limited and clamped in the limiting space formed by the two guide arc surfaces 23, so that the overall stability and the verticality of the sleeve 26 during installation are ensured, the sleeve 26 is further accurately installed and positioned by matching the first insertion rod 28 with the first insertion hole 29 and matching the second insertion rod 30 with the second insertion hole 31, and the sleeve 26 can be just clamped and fixed by the lower limiting nut 37 on the first insertion rod 28 and the upper limiting nut 36 on the second insertion rod 30 after the sleeve 26 moves in place, so that the structural stability of the sleeve 26 after moving in place is ensured, and the subsequent guide limiting effect of the sleeve 26 is ensured;

(7) installing a supporting plate 41 in the sleeve 26, arranging an expansion plate 39 outside the sleeve 26, arranging a positioning post 38 on the expansion plate 39, making a positioning through hole 43 on the supporting plate 41 correspond to the positioning post 38, sleeving the supporting plate 41 on the positioning post 38, screwing a positioning nut 42 into the end of the positioning post 38 and screwing down, so that the center hole of the supporting plate 41 and the center hole of the sleeve 26 are on the same straight line, then inserting a positioning post rod 40 into the center hole of the supporting plate 41, moving the positioning post rod 40 downwards until the positioning post rod 40 touches the ground, screwing down the first set screw 6 and the second set screw 15, moving the adjusting sleeve 26, driving the positioning post rod 40 to move synchronously until the bottom end of the positioning post rod 40 just moves to the pile position, screwing down the first set screw 6, the second set screw 15 and the fastening nut 20, and fixing the base 4 and the ground through the matched screws reserved in the foundation positioning holes 34 on the base 4, then the positioning pile rod 40 is taken down, and the positioning nut 42 is screwed down to detach the support plate 41; the supporting plate 41 is accurately positioned with the sleeve 26 through the positioning column 38 and the positioning through hole 43, the hole at the center of the supporting plate 41 is ensured to be coaxial with the hole of the sleeve 26 after installation, the supporting plate 41 is limited and fixed through the positioning nut 42 after being installed in place, the overall installation firmness of the supporting plate 41 is effectively ensured, the positioning pile rod 40 is inserted into the center of the supporting plate 41, the first fastening screw 6 and the second fastening screw 15 are loosened through screwing, and the fastening nut 20 is not tightened, so that the position of the positioning pile rod 40 can be adjusted in an all-around manner, the bottom end of the positioning pile rod 40 is just moved to the pile position, the center of the hole of the sleeve 26 is just positioned at the pile position, the subsequent guiding and limiting of a grouting pipe are facilitated, the verticality in the grouting pipe setting process is ensured, and when the positioning pile rod 40 moves, the first fastening screw 6 is tightened, The second set screw 15 and the fastening nut 20 ensure the overall structural stability and firmness of the whole positioning device, so that the positioning pile rod 40 cannot be moved and adjusted, the sleeve 26 is accurately positioned, the base 4 is further fixed through the positioning hole 34 in cooperation with the foundation screw, the structural strength of the whole device after the positioning pile rod 40 is moved and adjusted in place is further ensured, the safety performance is improved, and the positioning pile rod 40 and the supporting plate 41 are taken down after the fixing, so that the subsequent guide hole drilling and grouting pipe driving setting are not influenced;

(8) loosening the upper limiting nut 36 and the lower limiting nut 37, moving the knocking sleeve 26 downwards along the arc guiding surface 23 and the guide groove 24 until the bottom end of the sleeve 26 is inserted into the ground by 10-25cm, and then tightening the upper limiting nut 36 and the lower limiting nut 37; after the sleeve 26 is moved in place, the sleeve 26 is moved towards the ground, so that the bottom end of the sleeve 26 is inserted into the ground for a certain length, the overall stability and verticality of the sleeve 26 after installation are ensured, and the installation firmness between the whole device and the ground is further improved;

3) drilling a guide hole: moving the drilling equipment to a proper position, enabling the bottom end of the drill rod to penetrate through the sleeve 26 to be abutted against the construction ground, adjusting the position of the drill rod to enable the drill rod to move to a pile position, and drilling a grouting guide hole with the depth of 5-8m at the pile position; the subsequent grouting pipe can be conveniently arranged by drilling the grouting guide hole with the depth of 5-8m, the aperture of the casing pipe 26 is larger, a space can be reserved for adjusting and drilling the drill rod, the design is reasonable and ingenious, the drill hole corresponds to the pile position, the formed grouting guide hole is just positioned at the designed pile position, the center of the casing pipe 26 is also just positioned at the pile position, and therefore the casing pipe 26 is ensured to correspond to the grouting guide hole;

4) and (3) arranging a grouting pipe:

(1) an inner guide sleeve 33 is arranged in the sleeve 26, the aperture of a hole in the center of the inner guide sleeve 33 is determined according to the outer diameter of a grouting pipe, the inner guide sleeve 33 is inserted into the sleeve 26, the position of the inner guide sleeve 33 is adjusted, a positioning through hole 43 in the inner guide sleeve 33 corresponds to a positioning column 38, the inner guide sleeve 33 is clamped on the positioning column 38 through the positioning through hole 43, and a positioning nut 42 is screwed into the positioning column 38 and screwed tightly; the inner guide sleeve 33 is adjusted and replaced according to the actual outer diameter size of the grouting pipe, the central aperture of the inner guide sleeve 33 is ensured to be just matched with the outer diameter of the grouting pipe, so that the limiting and guiding of the grouting pipes with different pipe diameters are realized, the verticality of the grouting pipe is limited and guided through the positioning device, the verticality in the grouting pipe setting process is ensured, and the pile forming quality is ensured, when the inner guide sleeve 33 is actually installed, the inner guide sleeve 33 is just clamped into the sleeve 26, the accurate positioning is realized through the positioning through hole 43 and the positioning column 38, and the inner guide sleeve 33 is clamped in place and then is limited and pressed through the positioning nut 42, so that the installation firmness between the inner guide sleeve 33 and the sleeve 26 is ensured;

(2) inserting the grouting pipe into the pre-drilled grouting guide hole through the inner guide sleeve 33, and then applying vertical pressure to the top end of the grouting pipe until the grouting pipe is buried to the specified hole depth; in the process of driving the grouting pipe, the grouting pipe is always limited and guided by the positioning device, so that the downward moving verticality of the grouting pipe in the process from the start of driving to the end of driving is ensured, the inclination deviation of the grouting pipe is effectively avoided, and the final pile forming quality is improved;

5) grouting operation: high-pressure water and compressed air are conveyed into a grouting pipe through a pipeline, enter the soil body through the grouting pipe and cut the soil body, cement paste is conveyed into the grouting pipe through the pipeline by a slurry pump and sprayed into the soil body, a reinforced body is formed by solidification in the soil, the grouting pipe is pulled out while grouting is performed by pipe pulling equipment, the bottom end of the grouting pipe is also provided with a pressure sensor, and the underground pressure in the whole grouting process is sensed in real time through the pressure sensor; by adopting the method to carry out grouting operation, the grouting effect can be ensured, the disturbance to the soil layer near the tunnel is reduced, the grouting process is intelligently controlled according to the pressure sensed by the pressure sensor in the grouting process, the balance of the underground pressure is ensured, the influence of guniting on the environment is reduced, and the construction purpose of micro-disturbance is achieved;

the bottom of the grouting pipe is provided with a mud discharging port, the grouting pipe is internally provided with a mud discharging pipe, the mud discharging port is communicated with the mud discharging pipe inside the grouting pipe, so that the redundant mixture of air, water and slurry enters the slurry discharge pipe through the slurry discharge port at the bottom end of the grouting pipe and then enters the slurry treatment equipment above the ground through the slurry discharge pipe for centralized treatment, the excess air, water and mud are discharged by matching the mud discharge port with the grouting pipe and collected and processed in a centralized manner, so that the waste of resources can be avoided, the cost is reduced, the phenomenon that the underground structure is influenced due to the abnormal underground pressure caused by the extrusion in the grouting process can be avoided, the excess air, water and mud are discharged, the pressure can be controlled, the balance of the underground pressure is ensured, and the disturbance to the stratum is reduced, and the whole grouting process is matched with a control system for automatic control, so that the error of operation is avoided, the reinforcing effect is good, and the quality is guaranteed.

The above is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any simple variations, equivalent substitutions or modifications based on the present invention to achieve substantially the same technical effects are within the scope of the present invention.