阅读说明：本技术 桩基施工定位方法 (Pile foundation construction positioning method ) 是由 李忠明 牛敬森 罗海龙 史国兴 张成贵 常宽宽 庞雷凯 于 2019-10-23 设计创作，主要内容包括：本发明提出了一种桩基施工定位方法,涉及建筑施工技术领域,包括场地平整、定位；埋设钢护筒：加设护桩,埋设钢护筒；控制垂直度；定位安装导向架：导向架包括形成正方形的工字型钢,正方形的四个角设置有角钢结构,相邻工字型钢之间设置有可根据钢护筒直径调节的斜支撑；成孔,解决现有技术中桩基施工定位方法中导向架无法灵活调节,定位导向效果差以及无法避免钢护筒外侧土坍塌的问题。(The invention provides a pile foundation construction positioning method, which relates to the technical field of building construction and comprises the steps of leveling and positioning a field; embedding a steel pile casing: additionally arranging a pile protector and embedding a steel pile casing; controlling the verticality; positioning and installing a guide frame: the guide frame comprises I-shaped steel forming a square, the four corners of the square are provided with angle steel structures, and an inclined support which can be adjusted according to the diameter of the steel casing is arranged between every two adjacent I-shaped steel; the hole forming solves the problems that in the pile foundation construction positioning method in the prior art, a guide frame cannot be flexibly adjusted, the positioning and guiding effects are poor, and soil collapse on the outer side of a steel protecting cylinder cannot be avoided.)

1. The pile foundation construction positioning method is characterized by comprising the following steps:

leveling and positioning the field: using a total station instrument to lay out a lofting tapping pile casing in a field at an embedding position;

embedding a steel pile casing: burying a plurality of pile guards along the circumferential direction of the burying position, and hoisting the steel pile guards to the burying position and burying the steel pile guards;

controlling the verticality: measuring the verticality deviation of the steel casing by using a horizontal ruler and a plumb bob, and controlling the verticality deviation of the steel casing to be not more than a first preset value;

positioning and installing a guide frame: the guide frame comprises I-shaped steel, the I-shaped steel is arranged to be surrounded to form a square, one side of each of four corners of the square, which is close to the ground, is provided with a corner steel structure along the side of the square, the adjacent I-shaped steel is provided with an inclined support, the inclined support comprises a first support rod and a second support rod, the second support rod is sleeved on the outer side of the first support rod to form a structure that the second support rod moves along the first support rod, the waist of the I-shaped steel is provided with a plurality of adjusting holes along the horizontal direction, the first support rod and the second support rod respectively penetrate through the corresponding adjusting holes through first bolts to be connected with the corresponding I-shaped steel, one end of the I-shaped steel, which is close to the ground, is uniformly provided with through holes, the I-shaped steel penetrates through the second bolts to be fixedly connected with the ground, the guide frame is hoisted to be transferred to the ground and is arranged outside, screwing the second bolt to a preset depth of being inserted into the ground, adjusting the inclined support to enable the inclined support to abut against the side wall of the steel casing, penetrating the first bolt through the corresponding adjusting hole, and screwing the first bolt to enable the inclined support to be fixed at the current position of the I-shaped steel;

and (6) forming holes.

2. The pile foundation construction positioning method according to claim 1, wherein the first support bar is provided with a limiting groove along the length direction thereof, the second support bar is provided with a third bolt perpendicular thereto and connected with the first support bar by the third bolt penetrating through the limiting groove, so as to form a structure in which the second support bar movably drives the third bolt to move in the limiting groove along the first support bar, and the step of positioning and installing the guide frame further comprises the steps of:

and screwing the third bolt to fix the first support rod and the second support rod at the current positions, and inserting a screw rod of the third bolt into the ground to the preset depth.

3. The pile foundation construction positioning method according to claim 2, wherein a stop plate is arranged on the screw rod of the third bolt, the stop plate is arranged to be capable of being inserted underground along with the screw rod, and the surface of the stop plate faces the steel casing.

4. The pile foundation construction positioning method according to claim 1, wherein the through holes are formed at four corners of a square formed by the I-shaped steel, the second bolts are arranged in the through holes, self-locking nuts are screwed to parts of the second bolts, which are positioned at the upper side and the lower side of the I-shaped steel, and a support plate is arranged at one side, close to the ground, of the self-locking nuts, which are positioned at the lower side of the I-shaped steel.

5. The pile foundation construction positioning method according to claim 1, wherein after the step of "burying the steel casing", the pile foundation construction positioning method further comprises the steps of:

and rechecking the central position of the steel casing by using the total station, and controlling the central position deviation of the central position of the steel casing and the central position deviation of the embedded position to be within a second preset value.

6. The pile foundation construction positioning method according to claim 4, wherein before the step of "burying the steel casing", the pile foundation construction positioning method further comprises the steps of:

and carrying out rust prevention treatment on the inner side and the outer side of the steel casing.

7. The pile foundation construction positioning method according to claim 1, wherein the steel casing comprises a short casing and a long casing, the short casing and the long casing are welded, and a reinforcing steel strip is welded at the joint of the short casing and the long casing.

Technical Field

The invention belongs to the technical field of building construction, and particularly provides a pile foundation construction positioning method.

Background

In pile foundation work progress, the construction precision and the straightness that hangs down of pile foundation require comparatively, can cooperate the location leading truck to construct usually, prevent that the steel from protecting a section of thick bamboo and taking place the skew in the work progress. The existing positioning guide frame is a scaffold formed by erecting waste steel bars and steel pipes on a construction site, and the scaffold is arranged outside a steel casing after the steel casing is embedded, according to the technical scheme, in the actual implementation process, the positioning guide effect of the scaffold is poor, the deviation of the steel casing in the construction process due to vibration cannot be avoided, and the scaffold type guide frame cannot be adjusted, is inconvenient to assemble and disassemble, is inconvenient to transport and cannot be reused; the construction scene of pile foundation is various, and there may be the phenomenon that there is the side slope near the pile foundation, and under this kind of construction situation, the soil layer that the steel protects a section of thick bamboo outside is probably because the vibration takes place to collapse, and scaffold's leading truck also can't avoid the phenomenon that the soil layer collapses.

Accordingly, there is a need in the art for a method of locating pile foundation construction that addresses the above-mentioned problems.

Disclosure of Invention

The invention provides a pile foundation construction positioning method, which solves the problems that a guide frame cannot be flexibly adjusted, the positioning and guiding effects are poor and soil collapse on the outer side of a steel casing cannot be avoided in the conventional pile foundation construction positioning method.

The technical scheme of the invention is realized as follows: the pile foundation construction positioning method comprises the following steps: leveling and positioning the field: using a total station instrument to lay out a lofting tapping pile casing in a field at an embedding position; embedding a steel pile casing: burying a plurality of pile guards along the circumferential direction of the burying position, and hoisting the steel pile guards to the burying position and burying the steel pile guards; controlling the verticality: measuring the verticality deviation of the steel casing by using a horizontal ruler and a plumb bob, and controlling the verticality deviation of the steel casing to be not more than a first preset value; positioning and installing a guide frame: the guide frame comprises I-shaped steel, the I-shaped steel is arranged to be surrounded to form a square, one side of each of four corners of the square, which is close to the ground, is provided with a corner steel structure along the side of the square, the adjacent I-shaped steel is provided with an inclined support, the inclined support comprises a first support rod and a second support rod, the second support rod is sleeved on the outer side of the first support rod to form a structure that the second support rod moves along the first support rod, the waist of the I-shaped steel is provided with a plurality of adjusting holes along the horizontal direction, the first support rod and the second support rod respectively penetrate through the corresponding adjusting holes through first bolts to be connected with the corresponding I-shaped steel, one end of the I-shaped steel, which is close to the ground, is uniformly provided with through holes, the I-shaped steel penetrates through the second bolts to be fixedly connected with the ground, the guide frame is hoisted to be transferred to the ground and is arranged outside, screwing the second bolt to a preset depth of being inserted into the ground, adjusting the inclined support to enable the inclined support to abut against the side wall of the steel casing, penetrating the first bolt through the corresponding adjusting hole, and screwing the first bolt to enable the inclined support to be fixed at the current position of the I-shaped steel; and (6) forming holes.

The technical effect of the scheme is as follows: the pile guards are embedded in advance along the circumferential direction of the embedding position, so that the embedding deviation of the steel pile guards is prevented from being too large; the guide frame is arranged outside the embedded steel casing in an enclosing mode, the guide frame is provided with the adjusting holes, the inclined supports are adjusted to be abutted to the position of the outer side wall of the steel casing and fixed, the steel casing is prevented from being deviated due to vibration in the construction process, the accuracy of the guide frame in positioning and guiding the steel casing is improved, the position of the inclined supports relative to I-shaped steel can be adjusted, the guide frame can be suitable for the steel casings with different diameters, the flexibility and the versatility of the guide frame are improved, and consumable materials of the guide frame are reduced; because near the position that sets up of pile foundation may have the slope, the soil layer in the steel pile casing outside can be because receiving the vibration emergence and collapse in the work progress, sets up the angle steel at four angles of leading truck, and the upper strata soil that will collapse easily protects a section of thick bamboo "parcel" towards the steel, has reduced the soil layer and has taken place the possibility of collapsing, and the setting of angle steel has also played firm effect to the leading truck in addition, has prevented that the leading truck from taking place the phenomenon of skew because of receiving the vibration.

In an optimal technical scheme of the above pile foundation construction positioning method, the first support bar is provided with a limit groove along a length direction thereof, the second support bar is provided with a third bolt perpendicular thereto and is connected with the first support bar by the third bolt penetrating through the limit groove, so as to form a structure in which the second support bar movably drives the third bolt to move in the limit groove along the first support bar, and the step of positioning and installing the guide frame further includes the following steps: and screwing the third bolt to fix the first support rod and the second support rod at the current positions, and inserting a screw rod of the third bolt into the ground to the preset depth.

The technical effect of the scheme is as follows: through the third bolt with first bracing piece and second bracing piece fixed connection to bury the third bolt underground, improved bearing force and the stability of bearing diagonal, thereby increased the steadiness of leading truck, further prevented that the steel from protecting a section of thick bamboo and taking place the skew in the work progress.

In the preferable technical scheme of the pile foundation construction positioning method, a stop plate is arranged on a screw rod of the third bolt, the stop plate can be inserted underground along with the screw rod, and the surface of the stop plate faces the steel casing.

The technical effect of the scheme is as follows: when vibration takes place in the work progress, the backstop board is through extruding its soil horizon all around, and the soil horizon plays backstop and supporting role to it, has further increased the stability of leading truck.

In an optimal technical scheme of the pile foundation construction positioning method, the through holes are formed in four corners of a square formed by the I-shaped steel, the second bolts are arranged in the through holes, self-locking nuts are screwed on parts, located on the upper side and the lower side of the I-shaped steel, of the second bolts, and a supporting plate is arranged on one side, close to the ground, of the self-locking nuts located on the lower side of the I-shaped steel.

The technical effect of the scheme is as follows: when unevenness appears on the ground, the guide frame can be kept horizontal by adjusting the self-locking nut, the accuracy of positioning and guiding of the guide frame is improved, the supporting plate is arranged on one side, close to the ground, of the self-locking nut on the lower side, and the self-locking nut is prevented from being pressed into the ground due to the fact that stress of the guide frame is large in the construction process to influence the horizontal arrangement of the guide frame.

In a preferred embodiment of the above pile foundation construction positioning method, after the step of "burying the steel casing", the pile foundation construction positioning method further includes the steps of: and rechecking the central position of the steel casing by using the total station, and controlling the central position deviation of the central position of the steel casing and the central position deviation of the embedded position to be within a second preset value.

The technical effect of the scheme is as follows: prevent that steel protects a section of thick bamboo and buries the deviation too big, can correct immediately when discovering the skew through the rechecking, eliminate the unfavorable factor that probably takes place the skew in the sprouting state.

In the above preferred technical solution of the pile foundation construction positioning method, before the step of "burying the steel casing", the pile foundation construction positioning method further includes the steps of: and carrying out rust prevention treatment on the inner side and the outer side of the steel casing.

The technical effect of the scheme is as follows: prevent the steel casing from rusting after contacting water or slurry and influencing the formation quality of the pile foundation.

In the preferable technical scheme of the pile foundation construction positioning method, the steel casing comprises a short casing and a long casing, the short casing and the long casing are connected in a welding mode, and a reinforcing steel strip is welded at the joint of the short casing and the long casing.

The technical effect of the scheme is as follows: the steel pile casing has accurate size, and the vertical wall inside the steel pile casing has one straight line to control the pile foundation forming quality.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of a guide frame used in the pile foundation construction positioning method of the present invention;

fig. 2 is a sectional view of a guide frame used in the pile foundation construction positioning method of the present invention;

fig. 3 is a schematic view of an inclined support of a guide frame used in the pile foundation construction positioning method of the invention;

fig. 4 is a schematic view of a second bolt of a guide frame used in the pile foundation construction positioning method of the present invention;

fig. 5 is a flow chart of the pile foundation construction positioning method of the invention.

List of reference numerals: 1. a steel casing; 2. a guide frame; 21. h-shaped steel; 211. an angle steel structure; 212. an adjustment hole; 213. a through hole; 214. a second bolt; 2141. a self-locking nut; 2142. a support plate; 22. obliquely supporting; 221. a first support bar; 2211. a limiting groove; 222. a second support bar; 2221. a third bolt; 2222. a stopper plate; 223. a first bolt.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicating the directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The concrete embodiment of the pile foundation construction positioning method of the invention is as follows: as shown in fig. 1 and 2, a total station, a steel casing 1 and a guide frame 2 are used in the pile foundation construction positioning process, wherein the guide frame 2 includes an i-shaped steel 21, the i-shaped steel 21 is enclosed to form a square, one side of each of four corners of the square close to the ground is provided with an angle steel structure 211 along a side of the square, an inclined support 22 is arranged between adjacent i-shaped steels 21, the inclined support 22 includes a first support rod 221 and a second support rod 222 sleeved outside the first support rod 221, the second support rod 222 moves along the first support rod 221 so as to change the length of the inclined support 22, the waist of the i-shaped steel 21 is provided with a plurality of adjusting holes 212 along the horizontal direction, the first support rod 221 and the second support rod 222 respectively penetrate through the corresponding adjusting holes 212 through a first bolt 223 so as to be connected with the corresponding i-shaped steel 21 so as to adjust the position of the inclined support 22 relative to the i-shaped steel 21, one end of the i-shaped steel 21, which is, the I-shaped steel 21 is fixedly connected with the ground through a second bolt 214 penetrating through the through hole 213.

The pile foundation construction positioning method comprises the following steps: leveling and positioning the field: using a total station instrument to lay out the steel tapping pile casing 1 in the field; embedding a steel pile casing: burying a plurality of guard piles along the circumferential direction of the burying position, and hoisting the steel guard cylinder 1 to the burying position and burying; controlling the verticality: measuring the verticality deviation of the steel casing 1 by using a horizontal ruler and a plumb bob, and controlling the verticality deviation of the steel casing 1 not to be larger than a first preset value (one thousandth of the length of the steel casing 1); positioning and installing a guide frame: the hoisting guide frame 2 is lowered to the ground and is arranged outside the steel casing 1 in an enclosing mode, the angle steel structure 211 is inserted into the ground, the second bolt 214 is screwed until the angle steel structure is inserted into the ground, the effective depth of the second bolt 214 embedded into the soil is not lower than 35cm, the inclined support 22 is adjusted to enable the inclined support 22 to abut against the side wall of the steel casing 1, the first bolt 223 penetrates through the corresponding adjusting hole 212, and the first bolt 223 is screwed to enable the inclined support 22 to be fixed at the current position of the I-shaped steel 21; and (6) forming holes. As an example, the piles are thin steel wires with a diameter of 0.5 mm.

The pile protection is embedded in advance along the circumferential direction of the embedding position, so that the embedding deviation of the steel pile casing 1 is prevented from being too large; the guide frame 2 is arranged outside the embedded steel casing 1 in an enclosing mode, the guide frame 2 is provided with the adjusting hole 212, the inclined support 22 is adjusted to be abutted to the outer side wall of the steel casing 1 and fixed, the steel casing 1 is prevented from deviating due to vibration in the construction process, the accuracy of the guide frame 2 in positioning and guiding the steel casing 1 is improved, the position of the inclined support 22 relative to the I-shaped steel 21 can be adjusted, the guide frame 2 can be suitable for the steel casings 1 with different diameters, the flexibility and the versatility of the guide frame 2 are improved, and consumable materials of the guide frame 2 are reduced; because near the position that sets up of pile foundation may have the slope, the soil layer in the 1 outside of steel casing can take place to collapse owing to receiving the vibration in the work progress, 2 four angles at the leading truck set up the angle steel structure, and the upper strata soil that will collapse easily is protected a section of thick bamboo "parcel" towards the steel, has reduced the possibility that the soil layer takes place to collapse, and the setting of angle steel structure has also played firm effect to the leading truck in addition, has prevented that the leading truck from taking place the phenomenon of skew because of receiving the vibration.

As a preferred embodiment, referring to fig. 1 and 3, the first support rod 221 is provided with a limit groove 2211 along the length direction thereof, the limit groove 2211 is a through groove along the up-down direction, the second support rod 222 is provided with a first bolt 2221 perpendicular thereto and connected with the first support rod 221 by the first bolt 2221 penetrating through the limit groove 2211, so as to form a structure that the second support rod 222 drives the third bolt 2221 to move in the limit groove 2211 along the first support rod 221, and the step of "positioning and installing the guide frame" further includes the following steps: the first bolt 2221 is tightened to fix the first support bar 221 and the second support bar 222 at the current positions, and the third bolt 2221 is buried in the ground by a predetermined depth, which is an effective depth of not less than 35 cm. By burying the third bolt 2221 underground, the supporting force and stability of the diagonal brace 22 are improved, thereby increasing the stability of the guide frame 2 and further preventing the steel casing 1 from shifting during construction.

As a preferred embodiment, with continued reference to fig. 3, a stop plate 2222 is provided on the screw of the third bolt 2221, and the stop plate 2222 is arranged so as to be able to be inserted into the ground following the screw with the plate surface of the stop plate 2222 facing the steel casing 1. When vibration takes place in the work progress, backstop 2222 is through extrudeing its soil horizon all around, and the soil horizon plays backstop and supporting role to it, has further increased leading truck 2's stability.

As a preferred embodiment, referring to fig. 1, 2 and 4, four corners of a square formed by the i-shaped steel 21 of the guide frame 2 are provided with through holes 213, second bolts 214 are arranged in the through holes 213, the second bolts 214 are arranged on the upper and lower sides of the i-shaped steel 21 and are provided with self-locking nuts 2141, and one side of the self-locking nut 2141 on the lower side of the i-shaped steel 21, which is close to the ground, is provided with a support plate 2142. When unevenness appears on the ground, the self-locking nut 2141 can be adjusted to keep the guide frame 2 horizontal, the accuracy of positioning and guiding of the guide frame 2 is improved, the supporting plate 2142 is arranged on one side, close to the ground, of the self-locking nut 2141 on the lower side, and the self-locking nut 2141 is prevented from being pressed into the ground by the guide frame 2 under large stress in the construction process to influence the horizontal arrangement of the guide frame 2.

As a preferred example, before the step of embedding the steel casing 1, it is necessary to perform rust prevention treatment on the inner and outer side walls of the steel casing 1. Prevent the steel casing 1 from rusting after contacting water or slurry and influencing the formation quality of the pile foundation.

As a preferred embodiment, after the step of embedding the steel casing 1, the pile foundation construction positioning method further includes: and (3) rechecking the central position of the steel casing 1 by using a total station, and controlling the deviation between the central position of the steel casing 1 and the central position of the embedded position within a second preset value, wherein the second preset value is +/-5 cm. The steel casing 1 is prevented from being buried too much in a burying way, and can be corrected immediately when the deflection is found through rechecking, so that the adverse factors which possibly generate the deflection are eliminated in a sprouting state.

As a preferred embodiment, the steel casing 1 comprises a short casing and a long casing, the short casing is welded with the long casing, and a reinforcing steel strip is welded at the joint, as an example, the short casing is 3 m/joint, the long casing is 5 ~ 10 m/joint, the width of the reinforcing steel strip is 50mm, and the thickness delta =12mm, so as to ensure the accurate size, ensure that the straightness of the cylinder body of the steel casing 1 meets the requirement, and the alignment of the internal vertical walls of the whole steel casing 1 plays a key role in controlling the pile foundation forming quality.

In summary, as shown in fig. 5, the pile foundation construction positioning method of the present invention includes the following steps: 1) leveling and positioning the field: using a total station instrument to lay out the steel tapping pile casing 1 in the field; 2) treating the steel casing: selecting a hard steel casing 1 with the wall thickness of 1cm, and performing rust prevention treatment on the inner side wall and the outer side wall of the steel casing 1; 3) embedding a steel protection cylinder: burying a plurality of guard piles along the circumferential direction of the burying position, and hoisting the steel guard cylinder 1 to the burying position and burying; 4) and rechecking the position of the steel protective cylinder: rechecking the central position of the steel casing 1 by using a total station, and controlling the central position deviation of the central position of the steel casing 1 and the central position deviation of the embedded position within +/-5 cm; 5) and controlling the verticality: measuring the verticality deviation of the steel casing 1 by using a horizontal ruler and a plumb bob, and controlling the verticality deviation of the steel casing 1 to be not more than one thousandth of the length of the steel casing 1; 6) positioning and installing the guide frame: the hoisting guide frame 2 is lowered to the ground and is arranged outside the steel casing 1 in an enclosing mode, the angle steel structure 211 is inserted underground, the second bolt 214 is screwed until the angle steel structure is inserted underground, the effective depth is not lower than 35cm, the inclined support 22 is adjusted to enable the inclined support 22 to abut against the side wall of the steel casing 1, the first bolt 223 penetrates through the corresponding adjusting hole 212, the first bolt 223 is screwed to enable the inclined support 22 to be fixed at the current position of the I-shaped steel 21, the third bolt 2221 is screwed to enable the first support rod 221 and the second support rod 222 to be fixed at the current position, the third bolt 2221 is inserted underground, and the effective depth is not lower than 35 cm; 7) and (6) forming holes.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.