Method and tool for renovating transverse deformation of shield tunnel
阅读说明:本技术 一种盾构隧道横向变形的整治方法及其整治工具 (Method and tool for renovating transverse deformation of shield tunnel ) 是由 葛寨辉 陈占 孟长江 房军 陈侃 陈仕奇 李应平 仲光伟 赵世煜 李仕波 高松松 于 2020-05-20 设计创作,主要内容包括:本申请公开了一种盾构隧道横向变形的整治方法,包括:确定变形段盾构隧道的管片横向变形最大的位置以及收敛设定位置;在横向变形最大的位置两侧的所述管片设置张紧连接件;调整所述张紧连接件使两侧的所述管片向内收敛至设定位置;向两侧的所述管片背后的空隙灌注注浆材料;注浆材料凝固达到预设强度后拆除所述张紧连接件。同时还提供一种盾构隧道横向变形的整治工具。本申请的一种盾构隧道横向变形的整治方法及其整治工具,整治方法具有操作简单,成本低的优点。(The application discloses method for renovating transverse deformation of shield tunnel, comprising: determining the position of the shield tunnel with the largest transverse deformation of the segment and the convergence setting position; tensioning connecting pieces are arranged on the duct pieces on two sides of the position with the largest transverse deformation; adjusting the tensioning connecting piece to enable the pipe pieces on the two sides to inwardly converge to a set position; grouting materials into gaps behind the back of the duct pieces on two sides; and removing the tensioning connecting piece after the grouting material is solidified to reach the preset strength. Meanwhile, the transverse deformation treatment tool for the shield tunnel is also provided. The method and the tool for remedying the transverse deformation of the shield tunnel have the advantages of being simple to operate and low in cost.)
1. A method for remedying transverse deformation of a shield tunnel is characterized by comprising the following steps:
determining the position of the shield tunnel with the largest transverse deformation of the segment;
tensioning connecting pieces are arranged on the duct pieces on two sides of the position with the largest transverse deformation;
adjusting the tensioning connecting piece to enable the pipe pieces on the two sides to inwardly converge to a preset position;
grouting materials into gaps behind the back of the duct pieces on two sides;
and removing the tensioning connecting piece after the grouting material is solidified to reach the preset strength.
2. The method according to claim 1, wherein the step of determining the position of the deformed segment of the shield tunnel where the lateral deformation of the segment is the largest comprises:
measuring the segments of the shield tunnel at the deformation section to obtain the transverse deformation value of each ring of segments;
and measuring the position of the maximum transverse deformation position of each ring of the pipe piece according to the measurement result.
3. The method of claim 2, wherein the segments of a deformed segment shield tunnel are measured using a three-dimensional laser scanner; and/or measuring the position of the maximum transverse deformation position of each ring of the pipe piece by using a total station.
4. The method of claim 1, wherein the step of providing said segments on opposite sides of a location of maximum lateral deformation with tensioning connectors comprises:
two groups of tensioning connecting pieces are arranged on the pipe piece on two sides of the position where the transverse deformation of each ring is the largest.
5. The method of claim 4, wherein two sets of said tensioning connectors are provided at one-third and two-thirds of the width of said tube sheet, respectively.
6. The method of claim 1, wherein the step of providing said segments on opposite sides of a location of maximum lateral deformation with tensioning connectors comprises:
and drilling mounting holes on the pipe sheets on the two sides, injecting bar-planting glue into the mounting holes, and respectively inserting the two ends of the tensioning connecting piece into the mounting holes for firm mounting.
7. The method of claim 1, wherein the step of adjusting the tensioning connection to inwardly converge the segments on either side to a predetermined position comprises:
setting horizontal convergence points at the middle positions of the pipe pieces on two sides of the position with the largest transverse deformation;
and adjusting the tensioning connecting piece, and measuring the deformation of the horizontal convergence point to enable the duct piece to inwardly converge to a preset position.
8. The method of claim 1, wherein the step of injecting grouting material into the space behind the back of the duct pieces on both sides comprises:
drilling grouting holes on the duct pieces on the two sides, wherein the grouting holes are communicated with holes on the back of the duct pieces;
mounting a grouting pipe in the grouting hole, and firmly anchoring the grouting pipe;
and connecting a grouting pipeline, and filling grouting materials into the gap behind the duct piece.
9. An improvement tool for transverse deformation of a shield tunnel, which is applied to the improvement method of any one of claims 1 to 8, and comprises:
the measuring instrument is used for determining the position of the shield tunnel with the largest transverse deformation of the segment and measuring the deformation of the segment at two sides of the position with the largest transverse deformation;
the tensioning connecting piece is connected with the duct pieces on two sides of the position with the largest transverse deformation;
the drilling equipment is used for drilling an installation hole for arranging the tensioning connecting piece and a grouting hole for grouting a gap behind the duct piece on the two sides; and
and the grouting equipment is used for grouting materials into gaps behind the duct pieces on two sides.
10. The orthopedic tool of claim 9, wherein the tensioning connection comprises:
an anchor bolt having one end anchored to the tube sheet on each side;
the connecting sleeve is connected with the other end of the anchoring bolt; and
and the two ends of the fastening bolt are respectively connected with the connecting sleeves on the two sides, and the fastening bolt is adjusted to enable the pipe pieces on the two sides to inwardly converge to a preset position.
Technical Field
The application relates to the technical field of tunnel engineering, in particular to a method and a tool for renovating transverse deformation of a shield tunnel.
Background
The shield method is widely applied by the advantages of safety, rapidness, little influence of climatic factors, low construction labor intensity, particular suitability for soft water-bearing stratum and the like. After the shield tunnel is built, transverse deformation can be generated under the influence of various factors. The factors causing deformation mainly include two major categories: one is caused by ballast above the tunnel, and the other is caused by disturbance of excavation unloading at two sides of the tunnel.
The shield tunnel is formed by splicing duct pieces through connecting bolts, and the outer diameter of the duct pieces is smaller than the diameter of shield excavation. After the duct pieces are assembled and separated from the shield shell, a large gap exists between the duct pieces and the stratum, and grouting filling needs to be carried out on the gap between the duct pieces and the stratum. If the filling is not compact, the pipe sheet can generate transverse deformation due to insufficient lateral resistance under the long-term action of soil pressure above the shield and dynamic load in the tunnel along with the lapse of time. The subway design specification provides specific provisions for the transverse deformation of the tunnel: after the shield tunnel is assembled into a ring, under the action of external load, the accumulated variation of the diameter is less than 5 per thousand D, but the deformation value is greater than the standard under many conditions. When the deformation is too large, the splicing seams of the segments can be opened, and water leakage can occur. Particularly, the segment is damaged or dropped when serious, which endangers the driving safety.
Disclosure of Invention
In view of this, the embodiments of the present application are expected to provide a method and a tool for remedying the lateral deformation of the shield tunnel, so as to solve the problem that the cost for remedying the lateral deformation of the shield tunnel is too high.
In order to achieve the above object, in one aspect of the embodiments of the present application, there is provided a method for remedying lateral deformation of a shield tunnel, including:
determining the position of the shield tunnel with the largest transverse deformation of the segment;
tensioning connecting pieces are arranged on the duct pieces on two sides of the position with the largest transverse deformation;
adjusting the tensioning connecting piece to enable the pipe pieces on the two sides to inwardly converge to a set position;
grouting materials into gaps behind the back of the duct pieces on two sides;
and removing the tensioning connecting piece after the grouting material is solidified to reach the preset strength.
Further, the step of determining the position where the transverse deformation of the segment of the deformed shield tunnel is the largest comprises the following steps:
measuring the segments of the shield tunnel at the deformation section to obtain the transverse deformation value of each ring of segments;
and measuring the position of the maximum transverse deformation position of each ring of the pipe piece according to the measurement result.
Further, measuring the segments of the shield tunnel at the deformation section by adopting a three-dimensional laser scanner;
and further, measuring the position of the maximum transverse deformation position of each ring of the duct piece by using a total station.
Further, the step of providing the segments on both sides of the position of maximum lateral deformation with tensioning connectors comprises:
two groups of tensioning connecting pieces are arranged on the pipe piece on two sides of the position where the transverse deformation of each ring is the largest.
Further, two sets of the tensioning connectors are respectively arranged at one third and two thirds of the width of the tube sheet.
Further, the step of providing the segments on both sides of the position of maximum lateral deformation with tensioning connectors comprises:
and drilling mounting holes on the pipe sheets on the two sides, injecting bar-planting glue into the mounting holes, and respectively inserting the two ends of the tensioning connecting piece into the mounting holes for firm mounting.
Further, the step of adjusting the tensioning connectors to enable the segments on the two sides to inwardly converge to a set position comprises:
setting horizontal convergence points at the middle positions of the pipe pieces on two sides of the position with the largest transverse deformation;
and adjusting the tensioning connecting piece, and measuring the deformation of the horizontal convergence point to enable the duct piece to inwardly converge to a set position.
Further, the step of pouring grouting materials into gaps behind the duct pieces on two sides comprises the following steps:
grouting holes are distributed on the pipe pieces on the two sides and communicated with the holes on the back of the pipe pieces;
installing a grouting pipe and firmly anchoring the grouting pipe;
and connecting a grouting pipeline, and filling grouting materials into the gap behind the duct piece.
In another aspect of the present application, there is provided an renovation tool for transverse deformation of a shield tunnel, which is applied to the renovation method described in any one of the above, the renovation tool comprising:
the measuring instrument is used for determining the position of the shield tunnel with the largest transverse deformation of the segment and measuring the deformation of the segment at two sides of the position with the largest transverse deformation;
the tensioning connecting piece is connected with the duct pieces on two sides of the position with the largest transverse deformation;
the drilling equipment is used for drilling an installation hole for arranging the tensioning connecting piece and a grouting hole for grouting a gap behind the duct piece on the two sides; and
and the grouting equipment is used for grouting materials into gaps behind the duct pieces on two sides.
Further, the tension link includes:
an anchor bolt having one end anchored to the tube sheet on each side;
the connecting sleeve is connected with the other end of the anchoring bolt; and
and the two ends of the fastening bolt are respectively connected with the connecting sleeves at the two sides, and the fastening bolt is adjusted to enable the pipe pieces at the two sides to inwardly converge to a set position.
The embodiment of the application provides a method for renovating transverse deformation of a shield tunnel, at first, confirm the biggest position of the section of jurisdiction transverse deformation of a deformation section shield tunnel, the section of jurisdiction in the biggest position both sides of transverse deformation sets up the tensioning connecting piece, the section of jurisdiction through adjusting the tensioning connecting piece messenger both sides inwards converges to the preset position, reduce the transverse deformation of the section of jurisdiction of shield tunnel, make the great regional section of jurisdiction transverse deformation of section of jurisdiction behind one's back and produce certain space between the stratum, space behind the section of jurisdiction to both sides is grouting material again, the tensioning connecting piece is demolishd after grouting material solidifies and reaches preset intensity, reach the purpose of renovating the transverse deformation of the section of shield tunnel. The method and the tool for remedying the transverse deformation of the shield tunnel have the advantages of being simple to operate and low in cost.
Drawings
FIG. 1 is a flow chart of a method for remedying the transverse deformation of the shield tunnel in the embodiment of the present application;
FIG. 2 is a schematic structural diagram illustrating a process of remedying lateral deformation of a shield tunnel according to an embodiment of the present application; and
FIG. 3 is a schematic structural diagram of a mounting hole and a grouting hole drill arranged on a segment in the embodiment of the application.
Description of the reference numerals
1. A duct piece; 2. tensioning the connecting piece; 10. grouting holes; 11. mounting holes; 12. a convergence point; 20. an anchor bolt; 21. a connecting sleeve; 22. and fastening the bolt.
Detailed Description
It should be noted that, in the present application, technical features in examples and embodiments may be combined with each other without conflict, and the detailed description in the specific embodiment should be understood as an explanation of the gist of the present application and should not be construed as an improper limitation to the present application.
The directional terms used in the description of the present application are intended only to facilitate the description of the application and to simplify the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered limiting of the application.
In one aspect of the embodiments of the present application, a method for remedying lateral deformation of a shield tunnel is provided, as shown in fig. 1, including the following steps:
s1: determining the position of the shield tunnel with the largest transverse deformation of the segment;
s2: tensioning connecting pieces are arranged on the duct pieces on two sides of the position with the largest transverse deformation;
s3: adjusting the tensioning connecting piece to enable the pipe pieces on the two sides to inwardly converge to a preset position;
s4: grouting materials into gaps behind the duct pieces on two sides;
s5: and removing the tensioning connecting piece after the grouting material is solidified to reach the preset strength.
The method for renovating the transverse deformation of the shield tunnel provided by the embodiment of the application comprises the steps of firstly determining the position where the transverse deformation of a
The method of remediating the examples of the present application will now be described in detail with reference to specific examples.
S1: and determining the position of the shield tunnel with the largest transverse deformation of the segment.
In an embodiment, referring to fig. 1, step S1 specifically includes:
measuring the
and measuring the position of the maximum transverse deformation position of each ring of the
The method for measuring the deformation of the
In one embodiment, a three-dimensional laser scanner is used to measure
In one embodiment, a total station is used to measure the position of the maximum lateral deformation of each ring of
S2: and tensioning connecting pieces are arranged on the pipe pieces on two sides of the position with the maximum transverse deformation.
In an embodiment, referring to fig. 1 and fig. 2, step S2 specifically includes: two groups of tensioning connecting pieces 2 are arranged on the
Tensioning connecting piece 2 is connected between the section of
In one embodiment, two sets of tension links 2 are provided at one third and two thirds of the width of the
In an embodiment, referring to fig. 1 and fig. 2, step S2 further includes:
The bar planting adhesive has the characteristics of high bonding strength, small shrinkage in the normal-temperature curing and hardening processes, excellent toughness and impact resistance after curing, convenience in construction and the like. For example, the mounting
Specifically, the aperture of the mounting
In one embodiment, referring to fig. 2, the tension link 2 includes: anchor bolt 20, connecting sleeve 21 and fastening bolt 22. One end of the anchor bolt 20 is anchored on the
It will be appreciated that in other embodiments, the tension link 2 may also comprise other components with telescopic function, such as an electric telescopic cylinder, a hydraulic telescopic cylinder, a pneumatic telescopic cylinder, etc. Power is provided for the tensioning connecting piece 2 through an external power source, the labor intensity of adjusting the tensioning connecting piece 2 is reduced, and the working efficiency of adjusting the tensioning connecting piece 2 is improved.
S3: and adjusting the tensioning connecting piece to enable the pipe pieces on the two sides to inwardly converge to a preset position.
In an embodiment, referring to fig. 2, the step S3 specifically includes:
arranging horizontal convergence points 12 at the middle positions of the
and adjusting the tensioning connecting piece 2, and measuring the deformation of the
A
S4: and grouting materials are poured into gaps behind the pipe pieces on the two sides.
In an embodiment, referring to fig. 1 and fig. 2, the step S4 specifically includes:
drilling grouting holes 10 on the
mounting a grouting pipe in the
connecting a grouting pipeline, and filling grouting materials into the back gap of the
Through adjustment tensioning connecting piece 2, make section of
Specifically, 2 grouting holes 10 are drilled in each ring of
In another aspect of the present application, there is provided an improvement tool for transverse deformation of a shield tunnel, which is applied to the improvement method of any one of the above embodiments, the improvement tool including:
the measuring instrument is used for determining the position of the shield tunnel with the largest transverse deformation of the
the tensioning connecting piece 2 is connected with the
the drilling equipment is used for drilling a mounting
and the grouting equipment is used for grouting materials into gaps behind the
In one embodiment, referring to fig. 2, the tension link 2 includes: anchor bolt 20, connecting sleeve 21 and fastening bolt 22. One end of the anchor bolt 20 is anchored on the
Specifically, the diameter of the anchor bolt 20 is 25mm to 40 mm. Preferably, the diameter of the anchor bolt 20 is 33mm, the hole depth of the mounting
In an embodiment, the measurement instrument comprises a three-dimensional laser scanner, a total station, and a convergence gauge. This application adopts three-dimensional laser scanner to measure the section of
The various embodiments/implementations provided herein may be combined with each other without contradiction.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
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