Slope sheet-pile wall structure

Abstract

The utility model relates to a side slope sheet-pile wall structure, which belongs to the field of civil engineering and comprises an anti-slide pile and a breast board. The lower portions of the anti-slide piles are cylindrical piles, the upper portions of the anti-slide piles are square column piles, and the cylindrical piles and the square column piles are connected in a pouring mode. The breast boards are connected with the square column piles in a pouring mode. Each square column pile corresponds to one soil retaining plate, an expansion joint is reserved between every two adjacent soil retaining plates, and the expansion joints are filled with expansion joint filler. The expansion joint filler is filled on the side of the retaining soil body; a transverse drainage pipe cavity is formed in the soil retaining plate, and a micropore pipe cavity for communicating the supporting soil body with the transverse drainage pipe cavity is formed in the soil retaining plate; the round piles are arranged at the bottom of the retaining wall, the square piles are arranged at the joint of the retaining wall and the round piles, and the problems of insufficient connection and stress concentration of the retaining wall and the piles are solved while the problems of long manual excavation time and high risk of the square piles are effectively solved. In addition, drainage can be conducted on a retaining soil body on the inner side of the sheet-pile wall, and cracks or damage of the retaining plate caused by water absorption of the soil body is effectively relieved.

Description

Technical Field

[0001] The utility model belongs to the field of civil engineering, and specifically relates to a slope pile - slab wall structure. Background Technique

[0002] The treatment of high slopes and landslides has always been the main work of disaster treatment in China. The pile - slab wall has achieved good results in the treatment of various slopes and landslides and has received unanimous praise in the field of slope retaining technology. Currently, the most widely used pile - slab wall is the structure of square piles plus retaining walls. However, the mechanical excavation of square piles is not yet common, and the excavation of square piles is mostly carried out manually. When the buried depth of the pile foundation in the pile - slab wall is relatively deep, the safety risk of manual excavation of square piles is relatively large and the excavation period is long. Although circular piles can be mechanically excavated to reduce construction risks, whether it is the front - hanging slab or the rear - hanging slab of the pile, there are certain problems if the circular pile foundation is directly connected to the retaining wall. For the rear - hanging slab, there is a problem of stress concentration in the retaining wall at the connection, and for the front - hanging wall, there is a risk of insufficient connection.

[0003] In addition, although the pile - slab wall plays a role in treating slopes, after the soil retained on the inner side of the pile - slab wall absorbs water, it will expand in volume, generating a large pressure on the entire pile - slab wall structure, especially on the retaining plates, which will cause cracks or even damage to the retaining plates, affecting the stability of the pile - slab wall structure. Content of the Utility Model

[0004] In order to overcome the problems existing in the background technique, the utility model provides a slope pile - slab wall structure. The bottom uses circular piles, and square piles are used at the connection with the retaining wall. While effectively solving the problems of long manual excavation time and high risk of square piles, it also solves the problems of insufficient connection and stress concentration between the retaining wall and the pile. In addition, it can drain the soil retained on the inner side of the pile - slab wall, effectively alleviating the cracks or damage of the retaining plates caused by soil water absorption.

[0005] To achieve the above - mentioned purpose, the utility model is realized through the following technical solutions:

[0006] The slope pile - slab wall structure includes anti - slide piles and retaining plates; the lower part of the anti - slide pile is a cylindrical pile, and the upper part is a square - column pile, and they are connected by pouring between the cylindrical pile and the square - column pile; the retaining plate is connected to the square - column pile by pouring; each square - column pile corresponds to one retaining plate, and a expansion joint is reserved between adjacent retaining plates, and the expansion joint is filled with expansion joint filler.

[0007] The expansion joint filler is filled on the side of the retained soil; a transverse drainage pipe cavity is arranged in the retaining plate, and microporous pipe cavities communicating the retained soil with the transverse drainage pipe cavity are arranged on the retaining plate.

[0008] Preferably, the retaining plate is poured on the inner side or the outer side of the square - column pile.

[0009] Preferably, the retaining plate is cast inside the square column pile; a horizontal support plate is provided at the inner bottom of the square column pile; the retaining plate is cast between the horizontal support plate and the square column pile.

[0010] Preferably, the filling height of the expansion joint filler does not exceed the transverse drain pipe cavity.

[0011] Preferably, the cylindrical pile is a bored cast-in-place pile.

[0012] Advantages of the present utility model:

[0013] For the anti-slide pile of the present utility model, a structure with a cylindrical pile at the bottom, a square column pile at the upper part, and the cylindrical and square column piles being cast and connected is adopted: (1) The cylindrical shape can use bored cast-in-place pile construction, which improves construction efficiency and reduces construction risks. Especially for the treatment of high slopes where the embedded depth of the pile columns required is relatively large, this advantage is more prominent; (2) The cylindrical and square column piles are connected by cast-in-place reinforced concrete, with a firm connection. This not only ensures the stability of the overall structure of the anti-slide pile but also increases the connection area between the anti-slide pile and the retaining plate, improving the stability and strength of the overall structure of the high-slope support pile-plate wall; (3) The connection between the retaining plate and the square column pile is firm and stable.

[0014] The present utility model has a structure where one retaining plate corresponds to one anti-slide pile, and expansion joints are reserved between adjacent retaining plates: (1) It ensures the stability of the retaining plate structure; (2) The expansion joints can cope with the change in the volume of the retained soil mass and release part of the pressure on the retaining plate when the volume of the retained soil mass increases; (3) The expansion joint filler can relieve the loss of soil between the two retaining plates.

[0015] By arranging a transverse drain pipe cavity in the retaining plate and micro-pipe cavities connecting the retained soil mass and the transverse drain pipe cavity, the present utility model can effectively drain the water in the retained soil mass, reduce or relieve the volume increase caused by the increase in the water content of the retained soil mass, and the pressure on the pile-plate wall due to the increase in the soil mass volume. Description of the drawings

[0016] Figure 1 is the side view of the present utility model;

[0017] Figure 2 is the top view of the present utility model;

[0018] Figure 3 is the transverse sectional view of the retaining plate of the present utility model;

[0019] In the figure, 1 - anti-slide pile, 11 - cylindrical pile, 12 - square column pile, 2 - retaining plate, 3 - expansion joint, 4 - expansion joint filler, 5 - transverse drain pipe cavity, 6 - micro-pipe cavity, 7 - horizontal support plate, 8 - retained soil mass, 9 - road surface structure. Detailed implementation manners

[0020] In order to make the purpose, technical solution and beneficial effects of the present utility model clearer, the preferred embodiments of the present utility model will be described in detail below in conjunction with the accompanying drawings for the convenience of those skilled in the art to understand.

[0021] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "provided with" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] In the description of the present utility model, unless otherwise stated, for the terms "inner" and "outer" indicating the orientation or state relationship, the side where the soil retaining body is located is "inner", and the opposite side is "outer".

[0023] As Figures 1 - 3 shown, the slope pile - sheet wall structure includes anti - slide piles 1 and retaining plates 2.

[0024] The lower part of the anti - slide pile is a cylindrical pile 11, and the upper part is a square - column pile 12. The cylindrical pile 11 is a bored cast - in - place pile, and the square - column pile 12 and the cylindrical pile 11 are connected by pouring; the retaining plate 2 is connected to the square - column pile 12 by pouring; each anti - slide pile 1 corresponds to one retaining plate 2, and a expansion joint 3 is reserved between two adjacent retaining plates 2, and the expansion joint 3 is filled with expansion joint filler 4.

[0025] During construction, longitudinal steel bars are reserved at the top of the cylindrical pile 11, and the reserved length is greater than 1 / 3 of the total height of the square - column pile 12; the longitudinal steel bars at the top of the cylindrical pile 11 are connected, and the steel cages of the square - column pile and the retaining plate are lapped. After lapping, the square - column pile 12 and the retaining plate 2 are integrally cast.

[0026] For the anti - slide pile of the present utility model, the bottom adopts a cylindrical pile 11, and the upper part adopts a square - column pile 12, and the structure in which the cylindrical pile 11 and the square - column pile 12 are connected by pouring. The cylindrical pile 11 can be constructed by bored cast - in - place piles, which improves the construction efficiency and reduces the construction risk. Especially for the treatment of high slopes where the embedded depth of the pile columns required is relatively large, this advantage is more prominent; the cylindrical pile 11 and the square - column pile 12 are connected by pouring with reinforced concrete, and the connection is firm. This not only ensures the stability of the overall structure of the anti - slide pile 1, but also increases the connection area between the anti - slide pile 1 and the retaining plate 2, improving the stability and strength of the overall structure of the high - slope support pile - sheet wall.

[0027] The retaining plate 2 is provided with a transverse drain pipe cavity 5 inside, and the retaining plate 2 is provided with a microporous pipe cavity 6 that communicates with the supporting retaining soil body 8 and the transverse drain pipe cavity 5. The expansion joint filler 4 is filled inside or outside the expansion joint 3. Whether it is filled inside or outside, it is necessary to ensure that the expansion joint filler 4 does not block the transverse drain pipe cavity 5 to ensure the smooth drainage of the transverse drain pipe cavity 5. Affected by rainfall and the like, it is inevitable that the water content of the supporting retaining soil body 8 increases. When the water content of the supporting retaining soil body 8 increases, the volume of the soil body will expand, and then generate pressure on the pile-plank wall. If this pressure cannot be effectively released, it will cause the pile-plank wall, especially the retaining plate 2, to incline outward or crack. And setting an expansion joint 3 between two adjacent retaining plates 2 can effectively release or relieve this pressure. In addition, the structure where one retaining plate 2 corresponds to one anti-slide pile 1 is more conducive to resisting the pressure of the supporting retaining soil body 8 on the retaining plate 2 and enhancing the structural stability of the retaining plate 2. In addition, the water in the supporting retaining soil body 8 can penetrate into the transverse drain pipe cavity 5 through the microporous pipe cavity 6 and drain along the expansion joint 3.

[0028] In the current pile-plank wall, water is usually drained by opening vertical drain holes in the retaining plate 2 that penetrate the entire retaining plate 2 and communicate with the supporting retaining soil body 8. However, the drain holes of this structure are extremely easy to be blocked, and it is very difficult to dredge them after being blocked. Even if the drain holes are dredged, they are very easy to be blocked again in a short time and cannot effectively drain water. Moreover, the drain holes of this structure will also cause water loss. In the present invention, by setting an expansion joint 3 between the retaining plates 2, during rainfall, most of the rainwater will flow away along the expansion joint 3. Compared with the existing retaining plate structure with integral casting, the water storage capacity of the supporting retaining soil body 8 of the present invention can be significantly reduced. And adopting the structure where the microporous pipe cavity 6 communicates with the transverse drain pipe cavity 5, even if the microporous pipe cavity 6 is blocked by soil, it will still not affect its water infiltration function. And because the diameter of the microporous pipe cavity 6 is controlled within 5 mm, the soil entering the microporous pipe cavity 6 is difficult to enter the transverse drain pipe cavity 5, thus ensuring the smoothness of the transverse drain pipe cavity 5, effectively releasing the water in the supporting retaining soil body 8, and effectively relieving the volume expansion caused by the increase in the water content of the supporting retaining soil body 8, ensuring the stability of the pile-plank wall structure. In addition, the water drainage structure of the present invention can also effectively prevent soil and water loss. In the present invention, it is advisable that the diameter of the transverse drain pipe cavity 5 does not exceed 1 / 3 of the thickness of the retaining plate 2, and the diameter of the microporous pipe cavity 6 is preferably controlled at 2-5 mm.

[0029] The construction difficulty of the present invention lies in the structural processing of the retaining plate 2, and it is necessary to ensure the formation of a transverse drain pipe cavity 5 and a microporous pipe cavity 6 communicating with the transverse drain pipe cavity 5 inside the retaining plate 2. For this structure, before pouring concrete, a pipe mold that can form a microporous pipe cavity 6 communicating with the transverse drain pipe cavity 5 after pouring is pre-set (see the following demonstration part of the construction method for details).

[0030] The retaining plate 2 can be cast either inside or outside the square column pile 12. It is preferably cast inside the square column pile 12. Casting inside can reduce the obstacle impact on the retaining soil body 8 during casting.

[0031] As a preferred solution, a horizontal support plate 7 is provided at the bottom inside the square column pile 12. The retaining plate 2 is cast between the horizontal support plate 7 and the square column pile 12. Setting the horizontal support plate 7 can increase the supporting force for the retaining plate 2 and enhance the structural stability of the retaining plate 2.

[0032] Demonstration of the construction method of the present utility model:

[0033] (1) Drill a hole, lower the steel reinforcement cage, and cast the cylindrical pile 11. Longitudinal steel bars are reserved at the top of the cylindrical pile 11, and the reserved length is greater than 1 / 3 of the total height of the square column pile 12.

[0034] (2) Clear the site, connect the longitudinal steel bars at the top of the cylindrical pile 11, lap the steel reinforcement cages of the square column pile and the retaining plate. Pipe materials that can form a transverse drainage pipe cavity 5 and a microporous pipe cavity 6 after casting are arranged inside the steel reinforcement cage. For example, a corrugated pipe (cast iron material) is horizontally fixed inside the retaining plate steel reinforcement cage, and a microporous pipe (rigid plastic pipe) with one end inserted into the corrugated pipe. After casting, the corrugated pipe forms the transverse drainage pipe cavity 5, and the microporous pipe forms the microporous pipe cavity 6. The corrugated pipe can use ordinary cast iron pipes, and the microporous pipe uses rigid plastic pipes; the diameter of the microporous pipe cavity 6 is small. If it is cast with cast iron pipes, the microporous pipe cavity 6 will be blocked under long-term oxidation and it is difficult to transport, causing the microporous pipe cavity 6 to lose its hydrophobic function. During construction, according to the local rainfall, the longitudinal spacing of the transverse drainage pipe cavity 5 can be designed in advance. The corrugated pipe and the microporous pipe can be fixed inside the steel reinforcement cage in advance and then concrete is cast; or concrete can be cast layer by layer: after laying a layer and fixing the corrugated pipe and the microporous pipe, continue to cast concrete. When casting to the design position of the next transverse drainage pipe cavity 5, lay the corrugated pipe and the microporous pipe and continue to cast.

[0035] (3) The retaining plate 3 and the square column pile 12 are simultaneously formwork-supported and cast into shape with concrete;

[0036] (4) Install the expansion joint filler 4.

[0037] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present utility model and are not restrictive. Although the present utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present utility model.

Claims

1. A slope pile - slab wall structure, characterized in that, It includes anti-slide piles (1) and retaining plates (2); the lower part of the anti-slide pile is a cylindrical pile (11), and the upper part is a square column pile (12), and the cylindrical pile (11) and the square column pile (12) are connected by casting; the retaining plate (2) is connected to the square column pile (12) by casting; each anti-slide pile (1) corresponds to one retaining plate (2), and a expansion joint (3) is reserved between two adjacent retaining plates (2), and the expansion joint (3) is filled with expansion joint filler (4). The expansion joint filler (4) is filled on the inner side or the outer side of the expansion joint (3); a transverse drain pipe cavity (5) is provided in the retaining plate (2), and a microporous pipe cavity (6) communicating the retaining soil body (8) with the transverse drain pipe cavity (5) is provided on the retaining plate (2).

2. The slope pile-slab wall structure according to claim 1, wherein The retaining plate (2) is cast on the inner side or the outer side of the square column pile (12).

3. The slope pile-slab wall structure according to claim 1, characterized in that, The retaining plate (2) is cast on the inner side of the square column pile (12); a horizontal support plate (7) is provided at the inner bottom of the square column pile (12); the retaining plate (2) is cast between the horizontal support plate (7) and the square column pile (12).

4. The slope pile-slab wall structure according to claim 1, characterized in that, The filling height of the expansion joint filler (4) does not exceed the transverse drain pipe cavity (5).

5. The slope pile-slab wall structure according to claim 1, wherein The cylindrical pile (11) is a bored cast-in-place pile.

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