CN113202137A

CN113202137A - Row pile retaining wall with permanent retaining structure and construction method

Info

Publication number: CN113202137A
Application number: CN202010416672.6A
Authority: CN
Inventors: 苏伟; 崔维孝; 黄建川; 张青波; 曹佳宁; 周斌; 张凤维; 朱洪伟; 张高帅; 李文才; 白昱
Original assignee: China Railway Design Corp
Current assignee: China Railway Design Corp
Priority date: 2020-05-16
Filing date: 2020-05-16
Publication date: 2021-08-03

Abstract

The invention provides a row pile retaining wall with a permanent retaining structure, which comprises cast-in-situ bored piles, wherein the cast-in-situ bored piles are of a cylindrical structure, a crown beam is arranged at the top of each cast-in-situ bored pile, a reverse filtering layer is arranged between every two adjacent cast-in-situ bored piles, concrete panels are vertically arranged on the outer sides of the cast-in-situ bored piles and the outer sides of the reverse filtering layers, concrete cushions are horizontally arranged at the bottoms of the reverse filtering layers and the concrete panels, reinforcing mesh sheets are vertically arranged inside the concrete panels, a plurality of reinforcing ribs are equidistantly arranged on the reinforcing mesh sheets, water drainage holes are formed in the concrete panels and between every two adjacent cast-in-situ bored piles, and expansion joints are arranged on the concrete cushions, the concrete panels and the crown beam at intervals of about 10m and between the cast-in-situ bored piles. The reinforcing mesh is provided with a plurality of reinforcing ribs at equal intervals from top to bottom. The invention enables a user to use conventional equipment to carry out mechanical construction, has the characteristics of safety, reliability, high construction efficiency and low construction risk, and has popularization and application values.

Description

Row pile retaining wall with permanent retaining structure and construction method

Technical Field

The invention belongs to the field of retaining walls, and particularly relates to a row pile retaining wall with a permanent retaining structure and a construction method.

Background

The expansive rock soil is a special rock soil with the characteristics of repeated expansion and contraction, lower strength, more cracks and the like, has poor engineering properties, has extremely large change of mechanical properties after meeting water, and is very easy to cause disasters such as collapse, landslide and the like. According to the design specification of railway subgrade, the design of the expansive soil cutting slope follows the principle of combining the slope slowing rate, the wide platform, the reinforced slope toe and the proper slope protection. Usually, the toe reinforcement retaining structure is a rectangular sheet pile wall or a gravity retaining wall.

The gravity type retaining wall has no pre-reinforcing effect, a foundation pit needs to be excavated during construction, a temporary side slope is easy to collapse, and groove jumping excavation or temporary reinforcing measures need to be taken. The sheet pile wall has the pre-reinforcing effect, generally needs to adopt the mode construction of manual hole digging, and construction safety risk is higher relatively.

Disclosure of Invention

The invention aims to provide a row pile retaining wall with a permanent retaining structure and a construction method, which are particularly suitable for a user to use conventional equipment for construction and have the characteristics of safety, reliability, high construction efficiency and low construction risk.

In order to solve the technical problems, the invention adopts the technical scheme that: the row pile retaining wall comprises bored piles, each bored pile is of a cylindrical structure, a crown beam is arranged at the top of each bored pile, a reverse filter layer is arranged between every two adjacent bored piles, concrete panels are vertically arranged on the outer sides of the bored piles and the outer sides of the reverse filter layers, concrete cushions are horizontally arranged at the bottoms of the reverse filter layers and the concrete panels, reinforcing mesh sheets are vertically arranged inside the concrete panels and are positioned in the concrete panels, the free ends of the bottoms of the reinforcing mesh sheets are inserted into the concrete cushions, the tops of the reinforcing mesh sheets extend into the crown beams and are bound and connected with the reinforcing bars of the crown beams, a plurality of implanted reinforcing bars are arranged on the bored piles at equal intervals, a plurality of reinforcing ribs are arranged on the reinforcing mesh sheets at equal intervals, a water drainage hole is arranged on each concrete panel and between every two adjacent bored piles, each concrete cushion layer is formed by connecting the concrete panels, Expansion joints are arranged on the concrete panel and the crown beam every 10m or so and between the cast-in-situ bored piles. Reinforcing bar net piece from top to bottom the equidistance is provided with a plurality of strengthening ribs, and each implantation reinforcing bar all is located the strengthening rib by. The inverted filter layer is 0.5m thick sand filled with pebbles. The filling material in the expansion joint is asphalt reinforcement, and the filling amount of the asphalt reinforcement is at least 0.2 m. The filling material in the expansion joint is an asphalt wood board, and the filling amount of the asphalt wood board is at least 0.2 m.

The concrete construction method comprises the following steps:

firstly, excavating cutting side slopes and pile top platforms;

step two, constructing a cast-in-situ bored pile;

excavating the soil above the pile top to 10cm below the pile top, and excavating the soil before and among the piles to the bottom of the concrete cushion;

step four, constructing a concrete cushion layer between the piles;

step five, filling a reverse filtering layer from bottom to top in a layered manner;

step six, drilling holes at the designed position, implanting reinforcing steel bars, installing reinforcing steel bar meshes, and pre-burying drainage holes;

step seven, pouring panel concrete after the pile body deforms stably;

and step eight, constructing the crown beam to enable the crown beam to be flush with the wall top platform.

In the using process, after a user excavates the pile top platform, a cutting slope is excavated on one side of the pile top platform, firstly, a conventional machine is adopted to construct a bored pile, then, a soil body in front of the pile is excavated, and the bored pile can play a role in pre-reinforcement, so that the safety risk during construction is reduced, and the construction efficiency is improved; a bagged sand-pebble inverted filter layer with the thickness of 0.5m arranged between the cast-in-situ bored piles can effectively buffer the expansion and contraction deformation of expansive soil; the steel bar net piece in the concrete panel is connected with the cast-in-situ bored pile through the embedded steel bars of the pile body, so that the cast-in-situ formwork can be erected and poured, the appearance is ensured to be neat, and the steel bar net piece is bound and connected with the crown beam steel bars, so that the integrity is good; drainage holes are formed in the concrete panel between the bored piles to ensure smooth drainage; the expansion joint and the water drainage hole are arranged in a staggered mode, and good using effect is guaranteed.

The invention has the advantages and positive effects that: by adopting the technical scheme, a user can use conventional equipment to carry out mechanical construction, and the method has the characteristics of safety, reliability, high construction efficiency and low construction risk and has popularization and application values; the invention has simple structure, convenient maintenance and low processing cost.

Drawings

FIG. 1 is a schematic cross-sectional structural view of the present invention;

FIG. 2 is a schematic top view of the present invention;

fig. 3 is a schematic view of the connection structure of the steel mesh and the implanted steel bar according to the present invention.

In the figure:

1. cast-in-situ bored pile 2, crown beam 3 and inverted filter

4. Concrete panel 5, water drainage hole 6 and concrete cushion layer

7. Implanted steel bar 8, steel bar net piece 9 and side ditch platform

10. Side ditch 11, wall top platform 12, cutting slope

13. Expansion joint 14 and reinforcing rib

Detailed Description

As shown in figures 1-3, the invention relates to a row pile retaining wall with a permanent retaining structure and a construction method thereof, the row pile retaining wall comprises bored piles 1, the bored piles 1 are of a cylindrical structure, a crown beam 2 is arranged at the top of the bored piles 1, an inverted filter layer 3 is arranged between adjacent bored piles 1, concrete panels 4 are vertically arranged at the outer sides of the bored piles 1 and the outer sides of the inverted filter layers 3, concrete cushions 6 are horizontally arranged at the bottoms of the inverted filter layers 3 and the concrete panels 4, reinforcing mesh sheets 8 are vertically arranged in the concrete panels 4, the reinforcing mesh sheets 8 are positioned in the concrete panels 4, the free ends of the bottoms of the reinforcing mesh sheets 8 are inserted into the concrete cushions 6, the tops of the reinforcing mesh sheets 8 extend into the crown beam 2 and are bound and connected with the reinforcing steel bars of the crown beam 2, a plurality of implanted reinforcing steel bars 7 are equidistantly arranged on the bored piles 1, a plurality of reinforcing mesh sheets 14 are equidistantly arranged on the reinforcing mesh sheets 8, and a water drainage hole 5 is formed in the concrete panel 4 and between the adjacent cast-in-situ bored piles 1, and expansion joints 13 are formed in the concrete cushion 6, the concrete panel 4 and the crown beam 2 every 10m or so and between the cast-in-situ bored piles 1. The reinforcing mesh 8 is provided with a plurality of reinforcing ribs 14 from top to bottom at equal intervals, and each implanted reinforcing steel bar 7 is positioned beside the reinforcing rib 14. The inverted filter layer 3 is 0.5m thick bagged sand with pebbles. The filling material in the expansion joint 13 is asphalt reinforcement, and the filling amount of the asphalt reinforcement is at least 0.2 m. The filling material in the expansion joint 13 is asphalt wood plate, and the filling amount of the asphalt wood plate is at least 0.2 m.

In the using process, after a user excavates the pile top platform 11, a cutting slope 12 is excavated on one side of the pile top platform 11, the bored pile 1 is constructed by adopting a conventional machine, then the soil body in front of the pile is excavated, and the bored pile 1 can play a role of pre-reinforcement, so that the safety risk during construction is reduced, and the construction efficiency is improved; a bagged sand-pebble inverted filter layer 3 with the thickness of 0.5m arranged between the cast-in-situ bored piles 1 can effectively buffer the expansion and contraction deformation of expansive soil; the reinforcing mesh 8 in the concrete panel 4 is connected with the cast-in-situ bored pile 1 through the embedded reinforcing steel bars 7 of the pile body, so that the cast-in-situ formwork erection can be performed, the appearance is ensured to be neat, and the reinforcing mesh 8 is bound and connected with the reinforcing steel bars of the crown beam 2, so that the integrity is good; drainage holes 5 are formed in the concrete panels 4 among the cast-in-situ bored piles 1, so that smooth drainage is ensured; the expansion joint 13 and the drainage hole 5 are arranged in a staggered mode, and good using effect is guaranteed.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.

Claims

1. a pile row retaining wall of a permanent retaining structure is characterized in that: comprise bored cast-in-place pile (1), described bored cast-in-place pile (1) is a cylindrical structure, and described bored cast-in-situ pile (1) ) is provided with a crown beam (2) at the top, a reverse filter layer (3) is provided between the adjacent bored piles (1), the outer side of the bored pile (1) and the reverse filter layer (3) A concrete panel (4) is arranged vertically on the outside, a concrete cushion (6) is horizontally arranged at the bottom of the filter layer (3) and the concrete panel (4), and a concrete cushion (6) is arranged inside the concrete panel (4). A reinforcing mesh sheet (8) is vertically arranged, the reinforcing mesh sheet (8) is located in the concrete panel (4), and the bottom free end of the reinforcing mesh sheet (8) is inserted into the concrete cushion (6) , and the top of the reinforced mesh (8) extends into the crown beam (2), and is connected with the crown beam (2) by reinforcing bars, and several plantings are arranged at equal intervals on the bored pile (1). Reinforcing steel bars (7), several reinforcing bars (14) are provided at equal distances on the reinforcing bar mesh (8), and the concrete panels (4) are located between the adjacent bored piles (1). Drain holes (5) are provided, and the concrete cushion (6), the concrete panel (4) and the crown beam (2) are located at intervals of about 10m and are located between the bored piles (1). An expansion joint (13) is arranged between them.

2. The pile-row retaining wall of a permanent retaining structure according to claim 1, characterized in that: the steel mesh (8) is provided with a plurality of reinforcing ribs (14) equidistantly from top to bottom, and each said The implanted reinforcing bars (7) are all located beside the reinforcing bars (14).

3 . The pile-row retaining wall of a permanent retaining structure according to claim 1 , wherein the anti-filter layer ( 3 ) is 0.5 m thick bagged sand with pebbles. 4 .

4. The pile-row retaining wall of the permanent retaining structure according to claim 1, characterized in that: the filler in the expansion joint (13) is asphalt hemp, and the asphalt hemp is filled with at least 0.2 m.

5 . The pile-row retaining wall of a permanent retaining structure according to claim 1 , wherein the filler in the expansion joint ( 13 ) is an asphalt board, and the asphalt board is filled in at least 0.2 m. 6 .

6. the construction method of the pile row retaining wall of permanent support structure according to claim 1-5, is characterized in that: step is as follows:

Step 1, excavate the cutting slope (12) and the pile top platform (11);

Step 2, make a bored cast-in-place pile (1);

Step 3, excavate the soil above the top of the pile to 10cm below the top of the pile, and excavate the soil before and between the piles to the bottom of the concrete cushion (6);

Step 4, make concrete cushion (6) between piles;

Step 5, fill the reverse filter layer (3) in layers from bottom to top;

Step 6: Drilling holes and implanting steel bars (7) at the design positions, installing steel mesh sheets, and pre-embedding the scuppers (5);

Step 7: After the pile body is deformed and stabilized, the face concrete is poured;

Step 8, make crown beams (2) so that the crown beams are flush with the platform on the top of the wall.