A kind of artificially dug rectangular cross-section anchor pile assembled wall protection and its construction technology

Abstract

The present invention discloses an assembled retaining wall of an artificially dug rectangular cross-section anchor pile and a construction process thereof, comprising a connecting piece and a well piece prefabricated piece, wherein the well piece prefabricated piece is located on the well wall, and the well piece prefabricated piece comprises two U-shaped well piece prefabricated pieces and two plane well piece prefabricated pieces, wherein the two U-shaped well piece prefabricated pieces and the two plane well piece prefabricated pieces are spliced ​​into a rectangular structure along the circumferential direction of the pile well, wherein the two U-shaped well piece prefabricated pieces and the two plane well piece prefabricated pieces are mutually connected through a connecting piece, and a filler is poured between the outer side of the well piece prefabricated piece and the well wall. The retaining wall is a rectangular structure formed by splicing a plurality of U-shaped well piece prefabricated pieces and the plane well piece prefabricated pieces, wherein the U-shaped well piece prefabricated piece enables the splicing seam of the retaining wall to be located on the plane of the pile well to reduce the internal force on the retaining wall, and the filler ensures the close contact between the retaining wall and the well wall, thereby reducing the cross-sectional size.

Description

Technical Field

[0001] The invention relates to the fields of railways, highways, municipal administration and geological disaster control, and in particular to an assembled retaining wall with manually dug rectangular cross-section anchor piles and a construction process thereof. Background Art

[0002] Rectangular cross-section anchor piles are widely used in the fields of domestic railways, highways, municipal slope support and protection, and geological disaster control. At present, most rectangular cross-section anchor piles are constructed by manual excavation. In order to prevent large deformation of the well wall during construction, collapse or water seepage of the pile well, and to ensure the safety of construction workers, the side walls of the pile diameter generally need to be protected by a retaining wall. Conventional retaining walls are reinforced concrete concrete cast in on-site formwork. Conventional retaining walls have the following shortcomings: 1. It is necessary to tie steel bars on site, set up and dismantle formwork, and there are many processes; 2. It usually takes more than 7 days for cast-in-place concrete to reach strength, resulting in a long time from the excavation of the pile well to the exposure of the retaining wall to the performance of its protective function, large deformation of the well wall, and a high risk of collapse or water seepage of the pile well.

[0003] In the prior art, domestic technicians have proposed a prefabricated assembled steel retaining wall structure, but in order to solve the rigidity problem of the steel retaining wall, it is necessary to pour concrete inside the steel retaining wall. This technology actually only solves the shortcomings of the conventional retaining wall formwork and the removal of the formwork. Some technicians have also proposed prefabricated assembled concrete retaining walls, but this technology can only be applied to circular cross-section piles. The rectangular cross-section anchor piles used for retaining structures have large cross-sectional dimensions, and the internal forces (bending moment and shear force) on the retaining wall during the excavation of the pile well are also much greater than those of the circular cross-section. The above technology is not applicable. Summary of the invention

[0004] The purpose of the present invention is to provide an assembled retaining wall with manually dug rectangular cross-section anchor piles and a construction process thereof in view of the problem that the prefabricated spliced ​​concrete retaining wall in the prior art is not suitable for rectangular cross-section piles.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] An assembled retaining wall of an artificially dug rectangular cross-section anchor pile comprises a connecting piece and a well segment prefabricated piece, wherein the well segment prefabricated piece is located on the well wall;

[0007] The well segment prefabricated parts include two U-shaped well segment prefabricated parts and two flat well segment prefabricated parts, and the two U-shaped well segment prefabricated parts and the two flat well segment prefabricated parts are spliced ​​into a rectangular structure along the circumferential direction of the pile well;

[0008] The two U-shaped well plate prefabricated parts and the two planar well plate prefabricated parts are connected to each other through a connecting piece;

[0009] Filling is poured between the outer side of the well segment prefabricated component and the well wall.

[0010] Through the above structure, the retaining wall is a rectangular structure formed by splicing multiple U-shaped well segment prefabricated parts and flat well segment prefabricated parts. The U-shaped well segment prefabricated parts and the flat well segment prefabricated parts are spliced ​​into a whole through connecting parts. The U-shaped well segment prefabricated parts are used to make the splicing seams between the U-shaped well segment prefabricated parts and the flat well segment prefabricated parts be located on the plane of the pile well, which can ensure that the splicing seams of the well wall avoid the four corners where stress concentration exists on the structure, and reduce the internal force of the retaining wall during the excavation of the pile well. The filler between the rectangular retaining wall and the rectangular well wall ensures the close contact between the retaining wall and the well wall, and reduces the gap between the two and the cross-sectional size. When the rectangular retaining wall protects the well wall of the rectangular cross-section pile, the process is reduced and the efficiency is improved. The rectangular retaining wall is suitable for the well wall protection of the rectangular cross-section piles dug manually in various soil layers.

[0011] As a preferred solution of the present invention, the U-shaped well segment prefabricated member is arranged on the short side outer wall of the anchor pile well, and the flat well segment prefabricated member is arranged on the long side outer wall of the anchor pile well. Through the above structure, it is easier to hoist the U-shaped well segment prefabricated member arranged on the short side outer wall into the well, and the structural dimension surplus of the U-shaped well segment prefabricated member in the well is large, which is convenient for construction operation.

[0012] As a preferred solution of the present invention, the two ends of the U-shaped well plate preform are provided with a first offset and a first reserved hole, the two ends of the plane well plate preform are provided with a second offset and a second reserved hole, the axes of the first reserved hole and the second reserved hole are located on the same straight line, the shape of the first offset is adapted to the shape of the second offset, and the connecting piece passes through the first reserved hole and the second reserved hole to fix the U-shaped well plate preform and the plane well plate preform. Through the above structure, the U-shaped well plate preform and the plane well plate preform are spliced ​​together to form a complete rectangular protective wall.

[0013] As a preferred solution of the present invention, a bolt groove is provided on the planar well plate prefabricated member, the axis of the bolt groove is on the same straight line as the axis of the first reserved hole and the second reserved hole, and the ends of the first reserved hole and the second reserved hole are located on the side wall of the bolt groove. Through the above structure, the connecting member can enter the bolt groove through the first reserved hole and the second reserved hole.

[0014] As a preferred solution of the present invention, the connecting member includes a connecting bolt.

[0015] As a preferred solution of the present invention, the number of well segment prefabricated parts is at least two groups, at least two groups of well segment prefabricated parts are arranged along the vertical direction of the pile well, and the U-shaped well segment prefabricated parts and the plane well segment prefabricated parts are provided with hanging holes, and the hanging holes are through holes. Through the above structure, fillers are poured between the retaining wall and the well wall through the hanging holes, and the fillers can further strengthen the connection between the U-shaped well segment prefabricated parts and the plane well segment prefabricated parts and the well wall, reducing the cross-sectional size.

[0016] As a preferred solution of the present invention, the retaining wall further comprises a pile well lock, which is fixed at the pile well opening and arranged at the top of the retaining wall. The above structure can prevent the pile well opening from collapsing.

[0017] A manually excavated rectangular cross-section anchor pile assembled wall protection construction process comprises the following steps:

[0018] S1: Construction pile well lock;

[0019] S2: excavation of pile wells;

[0020] S3: Level the area corresponding to the retaining wall at the bottom of the pile well foundation pit;

[0021] S4: Install two U-shaped well plate prefabricated parts in place;

[0022] S5: Install two planar well plate prefabricated parts in place;

[0023] S6: Install and tighten the connectors between the adjacent U-shaped well segment prefabricated parts and the plane prefabricated parts;

[0024] S7: pouring filler into the gap between the retaining wall and the pile well wall;

[0025] S8: Repeat steps S3 to S9 until the pile bottom reaches the designed elevation.

[0026] The above construction technology is used to effectively realize the function of the above-mentioned wall protection, can be quickly assembled on site, reduces the working procedures, is easy to operate, and improves efficiency. It is suitable for the well wall protection of artificially dug rectangular cross-section piles in various soil layers.

[0027] As a preferred solution of the present invention, in step S1, U-shaped well segment prefabricated parts and planar well segment prefabricated parts are prefabricated in a prefabrication yard and then transported to the pile well location.

[0028] As a preferred solution of the present invention, in step S6, after the two planar well plate prefabricated members are installed in place, diagonal braces are provided outside the planar well plate prefabricated members.

[0029] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0030] The retaining wall is a rectangular structure formed by splicing multiple U-shaped well segment prefabricated parts and flat well segment prefabricated parts. The U-shaped well segment prefabricated parts and the flat well segment prefabricated parts are spliced ​​into a whole through connecting parts. The U-shaped well segment prefabricated parts are used to make the splicing seams between the U-shaped well segment prefabricated parts and the flat well segment prefabricated parts be located on the plane of the pile well, which can ensure that the splicing seams of the well wall avoid the four corners where stress concentration exists on the structure, and reduce the internal force of the retaining wall during the excavation of the pile well. The filler between the rectangular retaining wall and the rectangular well wall ensures the close contact between the retaining wall and the well wall, and reduces the gap between the two and the cross-sectional size. When the rectangular retaining wall protects the well wall of the rectangular cross-section pile, the process is reduced and the efficiency is improved. The rectangular retaining wall is suitable for the well wall protection of the rectangular cross-section piles dug manually in various soil layers.

[0031] The above construction technology is used to effectively realize the function of the above-mentioned wall protection, can be quickly assembled on site, reduces the working procedures, is easy to operate, and improves efficiency. It is suitable for the outer wall protection of pile wells of artificially dug rectangular cross-section piles in various soil layers. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of an artificially dug rectangular cross-section anchor pile assembled wall protection described in the present invention.

[0033] Figure 2 yes Figure 1 Section view along AA.

[0034] Figure 3 It is a structural schematic diagram of the U-shaped well plate prefabricated component described in the present invention.

[0035] Figure 4 It is a structural schematic diagram of the planar well plate prefabricated component described in the present invention.

[0036] Icons: 1-pile well; 2-U-shaped well segment prefabricated part; 3-flat well segment prefabricated part; 41-first offset; 42-second offset; 5-connecting bolt; 6a-first reserved hole; 6b-second reserved hole; 7-bolt groove; 8-lifting hole; 9-well wall; 10-pile well lock; 11-anchor rod; 12-filler. DETAILED DESCRIPTION

[0037] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0038] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0039] Example

[0040] like Figure 1-4As shown, this embodiment provides an artificially dug rectangular cross-section anchor pile assembled retaining wall, including a connecting piece and a well segment prefabricated piece;

[0041] The well segment prefabricated parts are arranged on the well wall 9, and the number of the well segment prefabricated parts is at least two groups. At least two groups of well segment prefabricated parts are arranged along the vertical direction of the pile well 1. One group of well segment prefabricated parts includes two U-shaped well segment prefabricated parts 2 and two flat well segment prefabricated parts 3. The U-shaped well segment prefabricated parts 2 are arranged on the short side outer wall of the pile well 1, and the flat well segment prefabricated parts 3 are arranged on the long side outer wall of the pile well 1. The two U-shaped well segment prefabricated parts 2 and the two flat well segment prefabricated parts 3 are spliced ​​into a rectangle along the circumferential direction of the pile well 1, and a complete rectangular structure is formed by connecting parts. Specifically, the connecting parts are connecting bolts 5. The U-shaped well segment prefabricated parts 2 and the flat well segment prefabricated parts 3 are made of reinforced concrete. The thickness of the well segment prefabricated parts is generally 0.3-0.5m, and the length of each group of well segment prefabricated parts is 1-2m.

[0042] The retaining wall further comprises a pile well lock opening 10 , and there are two pile well lock openings 10 , which are respectively fixedly arranged at the two ends of the pile well opening, and the pile well lock openings 10 are arranged at the top of the retaining wall.

[0043] The U-shaped well segment prefabricated component 2 is provided with a first offset 41 and a first reserved hole 6a at both ends, and the plane well segment prefabricated component 3 is provided with a second offset 42 and a second reserved hole 6b at both ends. The axes of the first reserved hole 6a and the second reserved hole 6b are located on the same straight line, and the shapes of the first offset 41 and the second offset 42 are adapted to each other. The connecting bolts 5 pass through the first reserved hole 6a and the second reserved hole 6b to connect the U-shaped well segment prefabricated component 2 and the plane well segment prefabricated component 3 together. Specifically, the connecting bolts 5 are generally arranged every linear meter along the depth direction of the pile well 1, and the connecting bolts 5 should be arranged close to the inner side of the pile well 1. The thickness of the concrete protective layer outside the first reserved hole 6a and the second reserved hole 6b is generally 5-7cm.

[0044] A bolt groove 7 is provided on the planar well block preform 3 in the horizontal direction. The axis of the bolt groove 7 is located on the same straight line as the axis of the first reserved hole 6a and the second reserved hole 6b. The ends of the first reserved hole 6a and the second reserved hole 6b are located on the side wall of the bolt groove 7.

[0045] The U-shaped well segment prefabricated component 2 and the plane well segment prefabricated component 3 are provided with hanging holes 8, and fillers 12 are poured between the retaining wall and the well wall 9 through the hanging holes 8. Specifically, the fillers 12 include cement mortar or pure slurry.

[0046] This embodiment also provides a manually excavated rectangular cross-section anchor pile assembly type wall protection construction process, including the following steps:

[0047] S1: Construction pile well lock 10;

[0048] Specifically, the U-shaped well segment prefabricated parts 2 and the plane well segment prefabricated parts 3 are centrally prefabricated in the prefabrication yard, and after the strength meets the requirements, they are transported to the anchor pile position, and the pile well lock 10 is constructed according to the traditional manual bored pile process;

[0049] S2: excavation of pile well 1;

[0050] Specifically, when excavating pile well 1, the excavation depth of each batch should be consistent with the standard section length of the prefabricated spliced ​​retaining wall, generally 1-2m, and the cross-sectional size of the excavation of pile well 1 should be 2-5m larger than the outer contour of the retaining wall;

[0051] S3: Leveling the part of the bottom of the foundation pit of pile well 1 corresponding to the retaining wall;

[0052] Specifically, the part of the bottom of the foundation pit of pile well 1 corresponding to the retaining wall is leveled with medium-coarse sand or cement mortar;

[0053] S4: Install two U-shaped well plate prefabricated parts 2 in place;

[0054] Specifically, two U-shaped well segment prefabricated members 2 are hoisted into the bottom of the pile well 1 by a crane and installed in place;

[0055] S5: Install two planar well plate prefabricated members 3 in place;

[0056] Specifically, two planar well plate prefabricated members 3 are hoisted into the bottom of the pile well 1 by a crane, installed in place, and diagonal braces are provided to prevent the planar well plate prefabricated members 3 from tilting;

[0057] S6: Install the connector and tighten it;

[0058] Specifically, install the connecting bolt 5 and tighten it;

[0059] S7: pouring filler 12 into the gap between the retaining wall and the wall of the pile well 1;

[0060] Specifically, cement mortar is poured into the gap between the retaining wall and the wall of the pile well 1 through the hoisting hole 8, and an anchor rod 11 is driven into the hoisting hole 8 to enhance the stability of the retaining wall structure in the soft formation section;

[0061] S8: Repeat steps S3 to S9 until the pile bottom reaches the designed elevation.

[0062] The beneficial effects of the artificially dug rectangular cross-section anchor pile assembled retaining wall and its construction process provided in this embodiment are:

[0063] The retaining wall is a rectangular structure formed by splicing a plurality of U-shaped well plate prefabricated parts 2 and a plane well plate prefabricated part 3. The U-shaped well plate prefabricated part 2 and the plane well plate prefabricated part 3 are spliced ​​together to form a whole through a connecting part. The U-shaped well plate prefabricated part 2 is used to make the splicing seam between the U-shaped well plate prefabricated part 2 and the plane well plate prefabricated part 3 located on the plane of the pile well 1, which can ensure that the splicing seam of the retaining wall is located at the minimum internal force of the structure, thereby reducing the internal force received by the retaining wall during the excavation of the pile well 1. The filler 12 between the rectangular retaining wall and the rectangular well wall ensures the close contact between the retaining wall and the well wall, reduces the gap between the two and the cross-sectional size. When the rectangular retaining wall protects the rectangular cross-section pile, the process is reduced and the efficiency is improved. The rectangular retaining wall is suitable for the outer wall protection of the rectangular cross-section piles dug manually in various soil layers;

[0064] The U-shaped well segment prefabricated member 2 is arranged on the short side outer wall and is easy to be hoisted down the well. The structural dimension surplus of the U-shaped well segment prefabricated member 2 in the well is large, which is convenient for construction operation.

[0065] The filler 12 can further strengthen the connection between the U-shaped well plate preform 2 and the plane well plate preform 3 and the well wall;

[0066] The pile well lock 10 prevents the well mouth of the pile well 1 from collapsing;

[0067] The anchor rod 11 can further enhance the bearing capacity of the retaining wall and reduce the deformation of the retaining wall. At the same time, the anchor rod 11 can further enhance the connection between the U-shaped well segment prefabricated part 2 and the plane well segment prefabricated part 3 and the pile well 1 to prevent the outer wall of the pile well from falling.

[0068] The above construction technology is used to effectively realize the function of the above-mentioned retaining wall, can be quickly assembled on site, reduces the working procedures, is easy to operate, and improves efficiency. It is suitable for the external protection of pile wells of artificially excavated rectangular cross-section piles in various soil layers.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An assembled wall protection with anchor piles of rectangular cross-section dug by hand, characterized in that: It comprises a connecting piece and a well segment prefabricated piece, wherein the well segment prefabricated piece is located on the well wall (9); The well segment prefabricated parts include two U-shaped well segment prefabricated parts (2) and two planar well segment prefabricated parts (3), and the two U-shaped well segment prefabricated parts (2) and the two planar well segment prefabricated parts (3) are spliced ​​into a rectangular structure along the circumferential direction of the pile well (1); The two U-shaped well plate prefabricated parts (2) and the two planar well plate prefabricated parts (3) are connected to each other via the connecting part; a filler (12) is poured between the outer sides of the well plate prefabricated parts and the well wall (9); The two ends of the U-shaped well plate preform (2) are provided with a first offset (41) and a first reserved hole (6a), and the two ends of the planar well plate preform (3) are provided with a second offset (42) and a second reserved hole (6b), the axes of the first reserved hole (6a) and the second reserved hole (6b) are located on the same straight line, the shape of the first offset (41) is adapted to the shape of the second offset (42), and the connecting member passes through the reserved hole (6) to fixedly connect the U-shaped well plate preform (2) and the planar well plate preform (3); The planar well block prefabricated component (3) is provided with a bolt groove (7), the axis of the bolt groove (7) is located on the same straight line as the axes of the first reserved hole (6a) and the second reserved hole (6b), and the ends of the first reserved hole (6a) and the second reserved hole (6b) are located on the side wall of the bolt groove (7); The connecting member comprises a connecting bolt (5); The number of the well plate prefabricated parts is at least two groups, and the at least two groups of the well plate prefabricated parts are arranged along the vertical direction of the pile well (1). The U-shaped well plate prefabricated part (2) and the planar well plate prefabricated part (3) are provided with hanging holes (8), and the hanging holes (8) are through holes.

2. The artificially dug rectangular cross-section anchor pile assembled wall protection according to claim 1 is characterized in that: The U-shaped well segment prefabricated component (2) is arranged on the short side outer wall of the anchor pile well, and the planar well segment prefabricated component (3) is arranged on the long side outer wall of the anchor pile well.

3. The artificially dug rectangular cross-section anchor pile assembled wall protection according to claim 1 is characterized in that: It also comprises a pile well locking mouth (10), wherein the pile well locking mouth (10) is fixed at the mouth of the pile well (1), and the pile well locking mouth (10) is arranged on the top of the protective wall.

4. A construction process for artificially excavated rectangular cross-section anchor piles assembled wall protection, characterized in that: The method of using an artificially dug rectangular cross-section anchor pile assembled wall protection as claimed in any one of claims 1 to 3 comprises the following steps: S1: Construction pile well lock (10); S2: excavation of pile well (1); S3: Leveling the area corresponding to the retaining wall at the bottom of the foundation pit of the pile well (1); S4: Install two U-shaped well plate prefabricated parts (2) in place; S5: Install two planar well plate prefabricated components (3) in place; S6: installing and tightening connecting pieces between adjacent U-shaped well segment prefabricated pieces (2) and planar well segment prefabricated pieces (3); S7: pouring filler (12) into the gap between the retaining wall and the wall of the pile well (1); S8: Repeat steps S3 to S9 until the pile bottom reaches the designed elevation.

5. The method of claim 4 for constructing a manually excavated rectangular cross-section anchor pile assembly type wall protection construction process is characterized in that: In the step S1, the U-shaped well segment prefabricated component (2) and the flat well segment prefabricated component (3) are prefabricated at a prefabrication site and then transported to the location of the pile well (1).

6. The method of claim 4 for constructing a manually excavated rectangular cross-section anchor pile assembly type wall protection construction process, characterized in that: In the step S6, after the two planar well plate prefabricated members (3) are installed in place, diagonal braces are arranged outside the planar well plate prefabricated members (3).

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