Cast-in-place pile type retaining wall

Abstract

The utility model discloses a cast-in-place pile type retaining wall, which relates to the technical field of retaining walls and comprises a plurality of pile holes, connecting holes arranged between adjacent pile holes, reinforcement cages arranged in the pile holes, connecting ribs fixedly arranged between two adjacent reinforcement cages and positioned in the connecting holes, and concrete filled in the plurality of pile holes and the connecting holes, the bottoms of the pile holes are provided with expanding heads used for increasing the contact area of the retaining wall and a foundation, and the inner walls of the multiple pile holes and the inner walls of the connecting holes are provided with waterproof layers used for preventing water and harmful substances from invading into concrete. By adopting the cast-in-place pile type retaining wall structure, the stability and durability of the retaining wall under complex geological conditions are improved, the waterproof performance of the retaining wall is improved by adding additives, the waterproof layer and other measures, the durability of the retaining wall is further improved, the contact area between the retaining wall and a foundation is increased through the expansion head, the bearing capacity is improved, and the service life of the retaining wall is prolonged. The overall structure is flexible and changeable and can be adjusted and optimized according to actual engineering requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of retaining walls, in particular to a cast-in-place pile retaining wall. Background Art

[0002] In civil engineering, retaining wall structures are usually used to maintain soil stability and prevent soil erosion. Retaining walls refer to structures that support roadbed fill or hillside soil and prevent fill or soil from deforming and becoming unstable.

[0003] In the cross-section of the retaining wall, the part that is in direct contact with the supported soil is called the wall back; the part facing the air opposite to the wall back is called the wall surface; the part that is in direct contact with the foundation is called the base; the top surface of the wall opposite to the base is called the wall top; the front end of the base is called the wall toe; and the rear end of the base is called the wall heel.

[0004] Existing retaining walls are mostly gravity, cantilever or buttress types. These conventional retaining wall structures rely on the deadweight of the wall to resist soil pressure, or increase stability by adding anchoring structures. However, in areas with complex geological conditions or low foundation bearing capacity, such as soft soil or slope areas, these traditional methods may be difficult to implement or have poor results, and their stability and durability may also be affected. Utility Model Content

[0005] The utility model aims at the deficiencies of the prior art and provides a cast-in-place pile retaining wall. The specific technical scheme is as follows:

[0006] A cast-in-place pile retaining wall comprises a plurality of pile holes, connecting holes provided between adjacent pile holes, a steel cage provided in the pile holes, connecting bars fixed between two adjacent steel cages and located inside the connecting holes, and concrete filled in the plurality of pile holes and the connecting holes, wherein an enlarged head for increasing the contact area between the retaining wall and the foundation is provided at the bottom of the pile holes, a waterproof layer for preventing moisture and harmful substances from invading the interior of the concrete is provided on the inner walls of the plurality of pile holes and the connecting holes, a positioning piece for positioning the steel cage to improve the stability of the steel cage when preventing concrete from being poured is provided at the bottom of the enlarged head, and a waterproof coiled material for forming a continuous waterproof structure with the waterproof layer is provided on the outer side of the positioning piece.

[0007] By adopting the above technical solution and using a cast-in-place pile retaining wall structure, its stability and durability under complex geological conditions are improved.

[0008] Optionally, the enlarged head is also filled with concrete.

[0009] By adopting the above technical solution, the enlarged head increases the contact area between the retaining wall and the foundation, thereby improving the bearing capacity of the retaining wall.

[0010] Optionally, an admixture for improving concrete performance is added to the concrete.

[0011] By adopting the above technical solution, the admixture can improve the performance of concrete, thereby further improving the durability of the cast-in-place pile retaining wall.

[0012] Optionally, the positioning member includes a positioning seat fixedly arranged in the middle of the bottom side of the enlarged head, and a positioning hole opened on the top of the positioning seat for supporting and positioning the steel cage.

[0013] By adopting the above technical solution, the positioning seat can accommodate and position the steel cage through the positioning hole, thereby improving the stability during concrete pouring and preventing the steel cage from shaking and scratching the waterproof layer during concrete pouring.

[0014] Optionally, a plurality of ground nails inserted into the foundation are fixedly provided at the bottom of the positioning seat.

[0015] By adopting the above technical solution, the ground nails can fix the positioning seat in the foundation, thereby improving the stability of the positioning seat when positioning the steel cage.

[0016] Optionally, the waterproof coiled material is fixed on the outside of the positioning seat.

[0017] By adopting the above technical solution, the waterproof coiled material outside the positioning piece can form a continuous waterproof structure with the waterproof layer, thereby preventing the steel cage from crushing the bottom of the waterproof layer due to its own weight and deteriorating the waterproofing of the bottom of the retaining wall.

[0018] Optionally, the concrete in the pile hole and the steel cage form a cast-in-place pile.

[0019] By adopting the above technical solution, since the bored piles are buried deep underground, the stability and durability of the retaining wall under complex geological conditions can be improved.

[0020] Optionally, a cap beam is fixed between the tops of the plurality of cast-in-place piles for increasing the overall structural rigidity of the retaining wall.

[0021] By adopting the above technical solution, the crown beam can be connected to the tops of multiple cast-in-place piles to further increase the rigidity of the overall structure. At the same time, the crown beam can also be used as a construction platform to facilitate subsequent processes.

[0022] In summary, the present invention has at least one of the following beneficial effects:

[0023] 1. By adopting the cast-in-place pile retaining wall structure, its stability and durability under complex geological conditions are improved. By adding admixtures and waterproof layers and other measures, the waterproof performance of the retaining wall is improved, thereby further improving the durability of the retaining wall. The enlarged head increases the contact area between the retaining wall and the foundation, improves the bearing capacity, and the overall structure is flexible and changeable, which can be adjusted and optimized according to actual engineering needs.

[0024] 2. Through the setting of the positioning parts, the steel cage can be loaded and positioned to improve the stability during concrete pouring, and the waterproof membrane on the outside of the positioning parts can form a continuous waterproof structure with the waterproof layer to prevent the steel cage from crushing the bottom of the waterproof layer due to its own weight and making the waterproofing of the bottom of the retaining wall worse. The crown beam can be connected to the top of multiple cast-in-place piles to further increase the rigidity of the overall structure. At the same time, the crown beam can also be used as a construction platform to facilitate subsequent processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0026] Figure 2 It is a top view of the connection between the pile hole, the connection hole and the waterproof layer of the utility model;

[0027] Figure 3 The utility model Figure 1 A magnified view of the structure in the middle.

[0028] Explanation of the reference numerals: 1. Pile hole; 11. Connection hole; 12. Steel cage; 13. Connection bar; 14. Concrete; 2. Enlarged head; 3. Waterproof layer; 4. Positioning seat; 41. Positioning hole; 42. Ground nail; 43. Waterproof membrane; 5. Crown beam. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-3 The utility model is described in further detail.

[0030] The utility model embodiment discloses a cast-in-place pile retaining wall, referring to Figure 1-2 , including a plurality of pile holes 1, a connecting hole 11 opened between adjacent pile holes 1, a steel cage 12 arranged in the pile hole 1, a connecting bar 13 fixed between two adjacent steel cages 12 and located inside the connecting hole 11, and concrete 14 filled in the plurality of pile holes 1 and the connecting hole 11. The concrete 14 in the pile hole 1 and the steel cage 12 form a cast-in-place pile. Since the cast-in-place pile goes deep into the ground, the stability and durability of the retaining wall under complex geological conditions can be improved. After the concrete 14 in the connecting hole 11 solidifies, a connecting part between the plurality of cast-in-place piles will be formed. A retaining wall can be formed by combining the plurality of cast-in-place piles. The connecting bar 13 can be made of high-strength materials such as steel bars and steel strands to improve the connection strength of adjacent cast-in-place piles.

[0031] This retaining wall is suitable for civil engineering projects that require soil conservation, soil erosion prevention, and increased foundation stability, especially in areas susceptible to natural disasters such as soil erosion and landslides.

[0032] Reference Figure 1 An enlarged head 2 for increasing the contact area between the retaining wall and the foundation is provided at the bottom of the pile hole 1. The enlarged head 2 is also filled with concrete 14. By arranging the enlarged head 2 at the bottom of the cast-in-place pile, the contact area between the retaining wall and the foundation is increased, and the bearing capacity is improved. The enlarged head 2 can adopt a conical or spherical structure, and the specific shape and size are determined according to geological conditions and design requirements.

[0033] Reference Figure 1 , an admixture for improving the performance of the concrete 14 is added to the concrete 14 , and the admixture may be an additive such as an antiseptic and a waterproofing agent that can improve the performance of the concrete 14 , thereby further improving the durability of the cast-in-place pile retaining wall.

[0034] Reference Figure 1 The inner walls of the multiple pile holes 1 and the connecting holes 11 are provided with a waterproof layer 3 for preventing moisture and harmful substances from invading the interior of the concrete 14. The waterproof layer 3 has a waterproof coating. People can use tools to apply the waterproof coating on the inner walls of the multiple pile holes 1 and the connecting holes 11, or fill the multiple pile holes 1 and the connecting holes 11 with the waterproof coating, and then extract the excess waterproof coating from the multiple pile holes 1 and the connecting holes 11 for reuse. At this time, a waterproof layer 3 will be formed in the multiple pile holes 1 and the connecting holes 11. The waterproof layer 3 can prevent moisture and harmful substances from invading the interior of the concrete 14.

[0035] Reference Figure 1 and Figure 3 A positioning piece is provided at the bottom of the enlarged head 2 for positioning the steel cage 12 to improve the stability of the steel cage 12 when preventing concrete 14 from being poured. The positioning piece includes a positioning seat 4 fixedly arranged in the middle of the bottom side of the enlarged head 2, and a positioning hole 41 opened on the top of the positioning seat 4 for supporting and positioning the steel cage 12. The outer wall of the steel cage 12 is in contact with the inner wall of the positioning hole 41. The positioning seat 4 can accommodate and position the steel cage 12 through the positioning hole 41, thereby improving the stability when pouring concrete 14 and preventing the steel cage 12 from shaking and scratching the waterproof layer 3 when pouring concrete 14.

[0036] Reference Figure 1 and Figure 3 A plurality of ground nails 42 inserted into the foundation are fixedly provided at the bottom of the positioning seat 4. The ground nails 42 can fix the positioning seat 4 in the foundation, thereby improving the stability of the positioning seat 4 when positioning the steel cage 12.

[0037] Reference Figure 1 and Figure 3, a waterproof coiled material 43 for forming a continuous waterproof structure with the waterproof layer 3 is provided on the outer side of the positioning member. The waterproof coiled material 43 is fixedly arranged outside the positioning seat 4. The waterproof coiled material 43 on the outer side of the positioning seat 4 can form a continuous waterproof structure with the waterproof layer 3, avoiding the waterproof layer 3 at the bottom of the retaining wall from being damaged or broken due to the self-weight of the steel reinforcement cage 12, thus preventing the waterproof performance at the bottom of the retaining wall from deteriorating.

[0038] Refer to Figure 1 , a capping beam 5 for increasing the overall structural stiffness of the retaining wall is fixedly arranged between the tops of multiple cast-in-place piles. The capping beam 5 is connected to the top of each cast-in-place pile, further increasing the stiffness and stability of the overall structure. At the same time, the capping beam 5 can also be used as a construction platform to facilitate the subsequent processes. The capping beam 5 can adopt a steel structure or a concrete structure form.

[0039] The implementation principle of a cast-in-place pile type retaining wall according to an embodiment of the present invention is as follows:

[0040] During construction, people can drill multiple pile holes 1 at predetermined positions, and use an under-reaming device to ream out an enlarged head 2 at the bottom of the pile holes 1. Then, the excavation construction of the connecting holes 11 is carried out between the multiple pile holes 1. Next, people can apply the waterproof layer 3 to the inner walls of the multiple pile holes 1 and the connecting holes 11;

[0041] After the waterproof layer 3 solidifies and dries, people can place the positioning seat 4 in the middle of the bottom surface of the enlarged head 2, and then use equipment to press the ground nails 42 at the bottom of the positioning seat 4 into the foundation, so that the waterproof layer 3 and the waterproof coiled material 43 on the outer side of the positioning seat 4 form a continuous waterproof structure;

[0042] Then, people use the connecting bars 13 to connect adjacent steel reinforcement cages 12, and then use equipment such as a crane to lift and place the steel reinforcement cages 12 into the positioning holes 41 in the positioning seat 4. Next, admixtures are added to the concrete 14, and then the concrete 14 mixed with the admixtures is poured into the multiple pile holes 1 and the connecting holes 11. After the concrete 16 solidifies, a cast-in-place pile type retaining wall will be formed, and then the construction of the capping beam 5 is carried out on the top of the retaining wall.

[0043] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cast-in-place pile retaining wall, comprising a plurality of pile holes (1), connecting holes (11) provided between adjacent pile holes (1), a steel cage (12) provided in the pile holes (1), a connecting bar (13) fixedly provided between two adjacent steel cages (12) and located inside the connecting hole (11), and concrete (14) filled in the plurality of pile holes (1) and the connecting hole (11), characterized in that: An enlarged head (2) for increasing the contact area between the retaining wall and the foundation is provided at the bottom of the pile hole (1); a waterproof layer (3) for preventing moisture and harmful substances from invading the interior of the concrete (14) is provided on the inner walls of the plurality of pile holes (1) and the connection hole (11); a positioning piece for positioning the steel cage (12) to improve the stability of the steel cage (12) when the concrete (14) is poured is provided at the bottom of the enlarged head (2); and a waterproof coiled material (43) for forming a continuous waterproof structure with the waterproof layer (3) is provided on the outer side of the positioning piece.

2. A cast-in-place pile retaining wall according to claim 1, characterized in that: The enlarged head (2) is also filled with concrete (14).

3. The cast-in-place pile retaining wall according to claim 1, characterized in that: An admixture for improving the performance of the concrete (14) is added to the concrete (14).

4. The cast-in-place pile retaining wall according to claim 1, characterized in that: The positioning member comprises a positioning seat (4) fixedly arranged at the middle part of the bottom side of the enlarged head (2), and a positioning hole (41) opened at the top of the positioning seat (4) for supporting and positioning the steel cage (12).

5. A cast-in-place pile retaining wall according to claim 4, characterized in that: A plurality of ground nails (42) inserted into the foundation are fixedly provided at the bottom of the positioning seat (4).

6. A cast-in-place pile retaining wall according to claim 5, characterized in that: The waterproof coiled material (43) is fixedly arranged outside the positioning seat (4).

7. The cast-in-place pile retaining wall according to claim 1, characterized in that: The concrete (14) in the pile hole (1) and the steel cage (12) form a cast-in-place pile.

8. The cast-in-place pile retaining wall according to claim 7, characterized in that: A cap beam (5) is fixedly provided between the tops of the plurality of cast-in-place piles for increasing the overall structural rigidity of the retaining wall.

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