Split retaining wall
By combining the pile-slab section and cantilever section of the split retaining wall, and using the pile body and gravity compression for fixation, along with the design of the third blocking structure and the protruding pressing section, the problem of construction difficulties of gravity and cantilever retaining walls under complex foundation conditions is solved, achieving efficient and low-cost soil support effect.
Patent Information
- Application Number
- CN202520135217.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2035-01-21
AI Technical Summary
Existing gravity and cantilever retaining walls face challenges in construction, large excavation areas, and high costs under demanding or complex foundation conditions, and their applicability is limited, especially in situations where land resources are scarce.
The structure adopts a split retaining wall, which combines a pile-slab section and a cantilever section. The piles provide the main support, while the base plate provides auxiliary support. The structure utilizes the gravity compression effect of the piles inserted into the foundation and the cantilever section to fix the structure. Combined with the design of a third barrier structure and a raised pressing section, it avoids large-area foundation excavation and optimizes the soil distribution through the partition structure and guide surface.
It enables effective soil retention under various construction conditions, reduces the foundation excavation area and engineering costs, improves structural stability and soil compaction, and reduces construction difficulty and maintenance complexity.
Smart Images
Figure CN223805576U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of geotechnical engineering more specifically, relate to a split type retaining wall. BACKGROUND
[0002] At present, the retaining wall used in geotechnical engineering is a structure for supporting roadbed fill or hillside soil body and preventing fill or soil body deformation instability, mainly divided into "gravity type retaining wall" and "cantilever type retaining wall". "Gravity type retaining wall" relies on the self weight of wall body to resist the earth pressure behind the wall, realizes the supporting effect to the rock-soil structure behind the wall. This retaining wall often needs the larger volume of wall body itself, and uses concrete as the main material, guarantees that the wall body can reach enough self weight. The construction technology of gravity type retaining wall is relatively mature, however when the height requirement of retaining wall is higher, the ground strength requirement of retaining wall is also synchronous promotion, and the applicability under the complex ground, geological condition is poor.
[0003] Further, cantilever type retaining wall appears, and its action mechanism is that the gravity of rock-soil structure is used to press the bottom plate of large area of retaining wall to realize fixation, and the thin reinforced concrete structure panel of retaining wall is used to resist the earth pressure of rock-soil structure, so the self volume of the retaining wall is smaller, and the requirement of ground strength is lower.
[0004] However, because cantilever type retaining wall has large area bottom plate, it needs to excavate large area foundation pit in advance to provide the construction condition of bottom plate. Today, land resources are scarce, and many municipal and highway engineering limit large area land excavation, so the applicable condition of cantilever type retaining wall is limited. INVENTION CONTENTS
[0005] The utility model aims at providing a split type retaining wall, which avoids the problem of large area excavation of foundation by combining pile wall and cantilever type retaining wall, provides main support by lower pile body and auxiliary support by upper bottom plate, and can adapt to various construction conditions.
[0006] The utility model is implemented by the following technical scheme:
[0007] The utility model discloses a split type retaining wall, which comprises a pile plate part and a cantilever part arranged at the upper end of the pile plate part.
[0008] The pile plate part comprises a plurality of pile bodies inserted into the foundation, and a first blocking structure connected with the part of the plurality of pile bodies not inserted into the foundation to form a first blocking area.
[0009] The cantilever part comprises a second blocking structure arranged on the upper end of the first blocking structure to form a second blocking area above the first blocking area, and a bottom plate arranged at the bottom of the second blocking structure and pressed by the soil in the first blocking area and the soil in the second blocking area, wherein the bottom of the bottom plate is provided with a protruding third blocking structure on the side away from the second blocking structure.
[0010] By adopting the technical scheme, the pile body inserted into the foundation provides support for the first blocking structure, thereby blocking the soil in the first blocking area from the foundation to the top of the first blocking structure, and increasing the height of the first blocking structure requires increasing the length of the pile body inserted into the foundation, so as to ensure the soil blocking capacity of the first blocking structure, and the deeper the excavation depth, the greater the difficulty of excavation. The cantilever part arranged on the top of the first blocking structure is used to block the soil in the second blocking area, the bottom plate of the cantilever part is pressed on the soil in the first blocking area and under the soil in the second blocking area, thereby realizing the fixing effect by the relative extrusion of the support force of the soil in the second blocking area and the soil in the first blocking area on the bottom plate. Compared with the existing cantilever retaining wall which needs to excavate a large area of foundation pit in advance to place the bottom plate, the bottom plate of the split-type retaining wall provided by the utility model is not placed on the foundation, which can meet the soil blocking demand of the construction scene where it is inconvenient to excavate a large area of foundation, can reduce the engineering cost of excavating a large area of foundation for other construction scenes, and significantly reduces the difficulty and complexity of later maintenance.
[0011] In actual construction, after the pile plate part is arranged, the first blocking area corresponding to the pile plate part is filled with soil and compacted, then the cantilever part is fixedly connected with the pile plate part, and the second blocking area corresponding to the second blocking structure is filled with soil. When the cantilever part is installed, the bottom plate is extruded by the top of the soil in the first blocking area, and the soil in the first blocking area below the bottom plate is extruded out of the coverage range of the bottom plate, so that the soil below the bottom plate, especially the dead angle between the bottom plate and the first blocking structure, may be hollow, causing the soil to be loose and empty, so that the bottom plate loses the support of the soil in the first blocking area, thereby affecting the fixing effect of the cantilever part by extruding the soil in the second blocking area and the soil in the first blocking area. Therefore, the third blocking structure is arranged on the bottom plate, a corresponding space is excavated in the first blocking area at the position corresponding to the third blocking structure on the top of the soil before the bottom plate is installed, the third blocking structure is placed in the position, and then the cantilever part is connected to the pile plate part, so that the bottom plate extrudes the soil in the first blocking area, and the soil is extruded from the side away from the second blocking structure, thereby realizing the effect of gathering the soil to the dead angle position between the bottom plate and the first blocking structure. After the installation of the retaining wall, the third blocking structure also has the function of auxiliary anchoring.
[0012] As a preferred embodiment of the utility model, the bottom of the bottom plate is provided with a plurality of uniformly distributed protruding lower pressing parts.
[0013] By adopting the technical scheme, the protruding lower pressing parts intrude into the soil in the process of extruding the top soil in the first blocking area when the cantilever part is installed, the soil is accumulated between the protruding lower pressing parts under extrusion, the soil density under the bottom plate is higher, and the overall density is more uniform, so that the loosening of the local soil does not cause the loosening and emptying of the surrounding soil to weaken the support of the bottom plate and the extrusion and fixing effect of the soil in the second blocking area on the bottom plate.
[0014] As a preferred embodiment of the utility model, the cross-sectional area of each protruding lower pressing part gradually decreases in the direction away from the bottom plate.
[0015] By adopting the technical scheme, the end of the protruding lower pressing part with smaller cross-sectional area is more likely to intrude into the soil, so that the local soil corresponding to the protruding lower pressing part is difficult to intrude and scatter, the bottom plate is difficult to be flattened, and the fixed connection of the cantilever part and the pile plate part is hindered.
[0016] As a preferred embodiment of the utility model, the protruding lower pressing part comprises a plurality of transverse protruding lower pressing structures arranged in parallel to the length direction of the third blocking structure and a plurality of longitudinal protruding lower pressing structures arranged perpendicular to the length direction of the third blocking structure, and each transverse protruding lower pressing structure and each longitudinal protruding lower pressing structure is provided with a shunt channel.
[0017] By adopting the technical scheme, the transverse protruding lower pressing structure and the longitudinal protruding lower pressing structure divide the soil under the coverage of the bottom plate into a plurality of blocks, which helps to limit the soil from being extruded out of the coverage of the bottom plate, and the shunt channel is arranged to move the soil from the block with higher density to the adjacent block with lower density, so that the soil density in each block tends to be balanced.
[0018] As a preferred embodiment of the utility model, each pile body top end is provided with a pile cap connected with the bottom plate.
[0019] The bottom plate bottom is provided with a first separation structure at the positions perpendicular to the two edges of the third blocking structure, and the bottom plate bottom is further provided with a second separation structure for dividing the bottom plate into a connection area connected with the pile cap and a non-connection area outside the connection area.
[0020] By adopting the technical scheme, in the process of installing the cantilever part, the bottom plate extrudes the soil in the first blocking area, and the soil will also be extruded from other edges under the blocking of the blocking structure, so that the soil under the coverage of the bottom plate is lost and the density is reduced, and at the same time, the area where the bottom plate is connected with the pile cap will also be filled with soil, so that the connection cannot be completely closed, and it is necessary to clean up while installing, which causes trouble to the construction operation. The first separation structure and the second separation structure are arranged together with the third blocking structure to limit the soil in the corresponding non-connection area, and the soil extruded by the bottom plate will not overflow the range of the non-connection area.
[0021] As a preferred embodiment of the utility model, the side wall of each of the first and second partition structures corresponding to the center of the bottom plate is inclined to the side away from the bottom surface of the bottom plate.
[0022] By adopting the above technical scheme, the inner side of each of the first and second partition structures corresponding to the inclined setting forms a guide surface.
[0023] As a preferred embodiment of the utility model, the top surface of the bottom plate is inclined to the side close to the second blocking structure.
[0024] By adopting the above technical scheme, when the rock-soil in the second blocking area presses on the inclined top surface of the bottom plate, the pressure exerted by the soil on the bottom plate perpendicular to the inclined top surface of the bottom plate can be decomposed into a vertical downward pressure and a horizontal pushing force directed away from the side of the second blocking structure, which to some extent offsets the lateral pressure borne by the retaining wall.
[0025] As a preferred embodiment of the utility model, the second blocking structure is inclined to the side of the third blocking structure.
[0026] By adopting the above technical scheme, the inclined second blocking structure can better handle the soil pressure than the vertical second blocking structure, especially in the case of high soil moisture content or dynamic load, which helps to disperse the soil pressure to a larger area of the retaining wall, thereby reducing the pressure on the unit area and reducing the risk of damage to the retaining wall.
[0027] As a preferred embodiment of the utility model, a reinforcing rib is arranged between the second blocking structure and the bottom plate.
[0028] As a preferred embodiment of the utility model, each of the pile body and the first blocking structure is integrally formed, and the second blocking structure, the bottom plate and the third blocking structure are integrally formed.
[0029] In summary, the utility model has the following advantages:
[0030] 1. By combining the pile wall and the cantilever retaining wall, the problem of large-area excavation of the foundation is avoided, the lower pile body provides main support, and the upper bottom plate provides auxiliary support, which can adapt to various construction conditions.
[0031] 2、The third blocking structure can block the soil from being extruded from the side away from the second blocking structure, realize the effect of gathering the soil to the dead angle position between the bottom plate and the first blocking structure, and the third blocking structure also has the auxiliary anchoring effect after the installation of the retaining wall is completed;
[0032] 3、The protruding depression part makes the soil under the bottom plate have higher compactness and the overall compactness more uniform, which can avoid the loosening of the local soil to cause the loosening and emptying of the surrounding soil, weaken the support of the bottom plate, and the extrusion and fixing effect of the rock-soil in the second blocking area and the rock-soil in the first blocking area on the bottom plate. BRIEF DESCRIPTION OF DRAWINGS
[0033] Figure 1 It is a structural schematic view of a split-type retaining wall in embodiment 1;
[0034] Figure 2 It is an application schematic view of a split-type retaining wall in embodiment 1, which shows the setting mode of the retaining wall on the foundation when the retaining wall is used to retain soil and the corresponding first blocking area and second blocking area;
[0035] Figure 3 It is a structural schematic view of the bottom plate of the cantilever part in embodiment 1;
[0036] Figure 4 It is another structural schematic view of the bottom plate of the cantilever part in embodiment 1;
[0037] Figure 5 It is a structural schematic view of the protruding depression part on the bottom of the bottom plate in embodiment 2;
[0038] Figure 6 It is a structural schematic view of the transverse protruding depression structure and longitudinal protruding depression structure on the bottom of the bottom plate in embodiment 2, and shows the setting mode of the shunt passage;
[0039] Figure 7 It is a structural schematic view of the first separation structure and second separation structure on the bottom of the bottom plate in embodiment 3, and shows the corresponding connection area and non-connection area.
[0040] In the figure: 1, pile plate part; 11, pile body; 12, first blocking structure; 13, pile cap; 14, first blocking area; 2, cantilever part; 21, second blocking structure; 22, bottom plate; 23, third blocking structure; 24, second blocking area; 3, protruding depression part; 31, transverse protruding depression structure; 32, longitudinal protruding depression structure; 33, shunt passage; 4, first separation structure; 5, second separation structure; 51, connection area; 52, non-connection area; 6, guide surface. DETAILED DESCRIPTION
[0041] The utility model will be made further detailed description in combination with the drawings.
[0042] The specific embodiments are merely illustrative of the present application, and are not intended to limit the present application. Those skilled in the art can make modifications to the embodiments without creative contribution after reading the specification, as long as the modifications are within the scope of the claims of the present application.
[0043] Embodiment 1
[0044] As shown in Figure 1 , Figure 2 A split type retaining wall, comprising a pile plate part 1 and a cantilever part 2 arranged at the upper end of the pile plate part 1.
[0045] The pile plate part 1 comprises a plurality of pile bodies 11 partially inserted into the foundation, and a first blocking structure 12 connected with the part of the plurality of pile bodies 11 not inserted into the foundation to form a first blocking area 14.
[0046] The cantilever part 2 comprises a second blocking structure 21 arranged at the upper end of the first blocking structure 12 to form a second blocking area 24 above the first blocking area 14, and a bottom plate 22 arranged at the bottom of the second blocking structure 21 and subjected to extrusion by the rock-soil in the first blocking area 14 and the rock-soil in the second blocking area 24, wherein the bottom of the bottom plate 22 is provided with a protruding third blocking structure 23 on the side away from the second blocking structure 21.
[0047] For example, the pile plate part 1 in the embodiment comprises four pile bodies 11, and the pile plate part 1 and the cantilever part 2 can be connected by high-strength steel bolt anchoring to ensure the integrity of the upper and lower structures, and the third blocking structure 23 can be a tie beam with the same length as the side of the bottom plate 22.
[0048] For example, the pile bodies 11 inserted into the foundation provide support for the first blocking structure 12 of the pile plate part 1, and the cantilever part 2 realizes the reinforcing effect by the relative extrusion of the support force of the rock-soil in the first blocking area 14 and the rock-soil in the second blocking area 24 by the self-gravity of the rock-soil in the second blocking area 24, effectively reducing the earthwork quantity of the structure foundation excavation and the area of the foundation pit excavation, saving land resources. The self-weight of the second blocking area 24 acts on the bottom plate 22, causing the overall structure of the retaining wall to have a tendency to overturn to one side of the bottom plate 22, which counteracts the tendency to overturn to the opposite side of the bottom plate 22 caused by the earth pressure on the second blocking structure 21, thereby improving the stability of the structure. In the process of extruding the top rock-soil in the first blocking area 14, the bottom plate 22 extrudes the soil from the side away from the second blocking structure 21, achieving the effect of gathering the soil to the dead corner position between the bottom plate 22 and the first blocking structure 12.
[0049] The lower pile body 11 below the foundation is formed by artificial or mechanical excavation, and after the hole is formed, the pile body 11 formwork is erected and spliced with the upper pile body 11 formwork above the foundation, and after the reinforcement cage is hoisted and lowered, the concrete is poured uniformly to ensure the integrity of the pile body 11 and improve the retaining effect. The first blocking structure 12 is synchronously bound and erected with the pile body 11 reinforcement cage through the connecting reinforcement of the pile body 11 during construction, and the concrete formwork is synchronously erected, and the reinforced concrete is integrally poured and formed with the pile body 11, which can avoid structural instability and structural cracking of the relatively thin first blocking structure 12 caused by soil pressure of the soil between piles, ensure the stress coordination of the first blocking structure 12 and the pile body 11, and improve the stability of the overall structure.
[0050] In some embodiments of the present application, the second blocking structure 21 is inclined to one side of the third blocking structure 23.
[0051] In some embodiments of the present application, the top surface of the bottom plate 22 is inclined to the side close to the second blocking structure 21.
[0052] Illustratively, the inclination angle should not be too large. When the inclination angle is too large, the soil in the cantilever part 2 will generate greater extrusion force on the second blocking structure 21 under the support of the floor, which is not worth the loss. The inclination angle is preferably set to 5° to 15°.
[0053] Explanatorily, when the rock-soil pressure in the second blocking area 24 is on the inclined top surface of the bottom plate 22, the pressure exerted by the soil on the bottom plate 22 perpendicular to the inclined top surface of the bottom plate 22 can be decomposed into a vertical downward pressure and a horizontal thrust directed away from the side of the second blocking structure 21, which to some extent offsets the lateral pressure borne by the retaining wall to block the soil.
[0054] Exemplarily, as shown in Figure 3 , the bottom plate 22 can be a flat plate that is inclined upward as a whole, as shown in Figure 4 , or can be a structure with a trapezoidal lateral cross section.
[0055] In some embodiments of the present application, a reinforcing rib is provided between the second blocking structure 21 and the bottom plate 22.
[0056] Illustratively, the reinforcing rib (also known as reinforcing bar or support rib) between the plates is mainly to improve the rigidity and stability of the plate structure to prevent excessive deformation or damage of the plate during use. For example, a reinforced concrete structure vertically arranged between the second blocking structure 21 and the bottom plate 22.
[0057] In some embodiments of the present application, each pile body 11 and the first blocking structure 12 are integrally formed, and the second blocking structure 21, the bottom plate 22 and the third blocking structure 23 are integrally formed.
[0058] Illustratively, the second blocking structure 21 is fixed on the bottom plate 22 by connecting the internal steel bars with the concrete, which improves the structural stability of the cantilevered part 2; the first blocking structure 12 is integrally cast with each pile body 11 by connecting the steel bars reserved on the side surface of each pile body 11.
[0059] Embodiment 2
[0060] As shown in FIG. 2, a split-type retaining wall comprises a plurality of pile bodies 11, a bottom plate 22, a first blocking structure 12, a second blocking structure 21, and a third blocking structure 23. Figure 5
[0061] In some embodiments of the present application, the cross-sectional area of each protruding pressing part 3 gradually decreases in the direction away from the bottom plate 22.
[0062] Illustratively, the structural shape, the number of settings, and the arrangement of the protruding pressing part 3 are not limited to the present example.
[0063] In some embodiments of the present application, as shown in FIG. 3, the protruding pressing part 3 comprises a plurality of transverse protruding pressing structures 31 arranged in parallel to the length direction of the third blocking structure 23 and a plurality of longitudinal protruding pressing structures 32 arranged perpendicular to the length direction of the third blocking structure 23, each of the transverse protruding pressing structures 31 and the longitudinal protruding pressing structures 32 is provided with a shunt passage 33. Figure 6 Illustratively, the transverse protruding pressing structures 31 and the longitudinal protruding pressing structures 32 divide the soil under the coverage of the bottom plate 22 into a plurality of blocks, which helps to limit the soil from being extruded out of the coverage of the bottom plate 22, and then the shunt passage 33 is provided for the soil to move from a block with higher density to an adjacent block with lower density, so as to make the soil density in each block tend to be balanced.
[0064] Embodiment 3
[0065] As shown in FIG. 4, a split-type retaining wall comprises a plurality of pile bodies 11, a bottom plate 22, a first blocking structure 12, a second blocking structure 21, and a third blocking structure 23.
[0066] Figure 7 The bottom plate 22 is provided with a first separation structure 4 at the position perpendicular to the two edges of the third blocking structure 23, and is further provided with a second separation structure 5 for dividing the bottom plate 22 into a connection area 51 connected with the pile cap 13 and a non-connection area 52 outside the connection area 51.
[0067]
[0068] Explanatoryly, the pile cap 13 is integrally cast with the pile body 11 via internal reinforcing steel bars. The connection between the base plate 22 and the pile cap 13 uses high-strength steel bolts with steel sleeves as positioning channels. The positions of the steel sleeves in the base plate 22 are pre-reserved during the precast reinforced concrete construction. The steel sleeves of the pile cap 13 are tied to the internal reinforcing steel bars. Steel plates are placed as gaskets at the top of the base plate 22 and the bottom of the pile cap 13 where the steel sleeves are located, ensuring more even stress distribution. After inserting high-strength threaded steel bars into the steel sleeves, the nuts at both ends are fixed, and grout is injected into the steel sleeves to complete the anchoring connection. For example, the precast reinforced concrete components of the base plate 22 use pre-reserved holes in the steel sleeves, and high-strength steel bolt holes are pre-reserved in the pile cap 13 during construction, aligning with the corresponding holes in the base plate 22. Each pile cap 13 has at least four symmetrical holes on both sides.
[0069] Explanatoryly, the first partition structure 4 and the second partition structure 5, together with the third barrier structure 23, confine the soil within the corresponding non-connection zone 52, so that the soil will not overflow the non-connection zone 52 even when squeezed by the bottom plate 22.
[0070] In some embodiments of this application, the sidewalls of the two first partition structures 4 and the second partition structure 5 that are close to the center of the base plate 22 are inclined to the side away from the bottom surface of the base plate 22.
[0071] Explanatoryly, the inner surfaces of the first dividing structure 4 and the second dividing structure 5, which are respectively inclined, form guide surfaces 6. When the first dividing structure 4 and the second dividing structure 5 are separating the soil, the soil is squeezed into the non-connected area 52 within the coverage of the bottom plate 22 under the guidance of the guide surfaces 6, so as to avoid soil loss caused by themselves during the separation process. In addition, the guide surfaces 6 also have the function of reducing resistance and helping the dividing structure to penetrate the soil.
[0072] Construction steps:
[0073] Based on the designed hole positions of the base plate 22 and the pile cap 13, the reinforced concrete precast structure of the base plate 22 and the second blocking structure 21 is completed, namely the cantilever part 2.
[0074] Determine the pile location and spacing for excavation of pile body 11, and complete the pile location drilling by means of manual excavation and mechanical excavation, and set up temporary support to prevent the hole from collapsing;
[0075] Erect the pile body 11, the first blocking structure 12, and the pile cap 13 formwork. Tie the steel sleeves aligned with the holes of the bottom plate 22 inside the pile cap 13 formwork, and then pour reinforced concrete in one piece, i.e., the pile plate part 1.
[0076] After the lower structure concrete strength is formed, the first blocking area 14 is backfilled with rock-soil, a corresponding space is dug out at the position corresponding to the third blocking structure 23 on the top of the rock-soil in the first blocking area 14, the third blocking structure 23 is hoisted and placed into the position, and the cantilever part 2 is anchored with the pile plate part 1 through high-strength steel bolt at the reserved hole position of the pile cap 13.
[0077] The second blocking area 24 is backfilled with rock-soil according to requirements to the top of the second blocking structure 21.
[0078] The above is only a preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.
[0079] The utility model will be further explained in detail below in combination with the drawings.
[0080] The specific embodiment is only an explanation of the utility model, and is not a limitation of the utility model, and the person skilled in the art can make a modification without creative contribution according to requirements after reading the specification, but as long as it is within the claim scope of the utility model, it is protected by the patent law.
[0081] Embodiment 1:
[0082] As shown in Figure 1 、 Figure 2 , a split type retaining wall comprises a pile plate part 1 and a cantilever part 2 arranged at the upper end of the pile plate part 1.
[0083] The pile plate part 1 comprises a plurality of pile bodies 11 inserted into the foundation, and a first blocking structure 12 connected with the part of the plurality of pile bodies 11 not inserted into the foundation to form a first blocking area 14.
[0084] The cantilever part 2 comprises a second blocking structure 21 arranged at the upper end of the first blocking structure 12 to form a second blocking area 24 above the first blocking area 14, and a bottom plate 22 arranged at the bottom of the second blocking structure 21 and extruded by the rock-soil in the first blocking area 14 and the rock-soil in the second blocking area 24, wherein the bottom of the bottom plate 22 is provided with a protruding third blocking structure 23 on the side away from the second blocking structure 21.
[0085] For example, the pile plate part 1 in the embodiment comprises four pile bodies 11, the pile plate part 1 and the cantilever part 2 can be connected through high-strength steel bolt anchoring, the integrity of the upper and lower structures is ensured, and the third blocking structure 23 can be a sleeper with the same length as the side length of the bottom plate 22.
[0086] Explanatorily, the pile body 11 inserted into the foundation provides support for the first barrier structure 12 of the pile plate part 1, and the cantilever part 2 is reinforced by the relative extrusion of the self-gravity of the rock-soil in the second barrier area 24 and the support force of the rock-soil in the first barrier area 14 on the bottom plate 22, effectively reducing the earthwork quantity of the structural foundation excavation, reducing the area of the foundation pit excavation, and saving land resources. The self-gravity of the second barrier area 24 on the bottom plate 22 causes the overall structure of the retaining wall to have a tendency to overturn to one side of the bottom plate 22, which counteracts the tendency to overturn to the opposite side of the bottom plate 22 caused by the earth pressure on the second barrier structure 21, thereby improving the stability of the structure. In the process of extruding the top rock-soil in the first barrier area 14, the bottom plate 22 extrudes the soil from the side away from the second barrier structure 21, thereby achieving the effect of gathering the soil to the dead angle position between the bottom plate 22 and the first barrier structure 12.
[0087] The lower pile body 11 below the foundation is excavated by artificial or mechanical excavation, and after the hole is formed, the pile body 11 formwork is erected and spliced with the upper pile body 11 formwork above the foundation, and after the reinforcement cage is hoisted and lowered, the concrete is poured uniformly to ensure the integrity of the pile body 11 and improve the retaining effect. During the construction of the first barrier structure 12, the connecting reinforcement of the pile body 11 is simultaneously bound and erected with the reinforcement cage of the pile body 11, and the concrete formwork is simultaneously erected, and the first barrier structure 12 and the pile body 11 are integrally poured and formed by reinforced concrete, which can avoid the structural instability and cracking of the relatively thin first barrier structure 12 caused by the earth pressure of the soil between the piles, ensure the stress coordination of the first barrier structure 12 and the pile body 11, and improve the stability of the overall structure.
[0088] In some embodiments of the present application, the second barrier structure 21 is inclined to one side of the third barrier structure 23.
[0089] In some embodiments of the present application, the top surface of the bottom plate 22 is inclined to the side close to the second barrier structure 21.
[0090] Illustratively, the inclination angle should not be too large. When the inclination angle is too large, the soil in the cantilever part 2 will generate a greater extrusion force on the second barrier structure 21 under the support of the floor, which is not worth the loss. The inclination angle is preferably set to 5° to 15°.
[0091] Explanatorily, when the rock-soil in the second barrier area 24 presses on the inclined top surface of the bottom plate 22, the pressure exerted by the soil on the bottom plate 22 can be decomposed into a vertical downward pressure and a horizontal thrust directed away from the second barrier structure 21, which to some extent counteracts the lateral pressure borne by the retaining wall to block the soil.
[0092] Illustratively, as shown in Figure 3 , the bottom plate 22 can be an overall upwardly inclined flat plate, as shown in Figure 4 , and can also be a structure with a trapezoidal lateral cross section.
[0093] In some embodiments of this application, a reinforcing rib is provided between the second blocking structure 21 and the base plate 22.
[0094] Illustratively, the reinforcing ribs (also known as stiffeners or support ribs) between the plates are primarily intended to improve the rigidity and stability of the plate structure, preventing excessive deformation or damage to the plates during use. For example, a reinforced concrete structure vertically positioned between the second barrier structure 21 and the base plate 22.
[0095] In some embodiments of this application, each pile body 11 and the first blocking structure 12 are integrally formed, and the second blocking structure 21, the base plate 22 and the third blocking structure 23 are integrally formed.
[0096] Illustratively, the second blocking structure 21 is precast and fixed to the base plate 22 by internal steel reinforcement, which improves the structural stability of the cantilever 2; the first blocking structure 12 is integrally cast with each pile body 11 after being connected to the steel reinforcement reserved on the side of each pile body 11.
[0097] Example 2:
[0098] like Figure 5 As shown, a split retaining wall differs from Embodiment 1 in that: the bottom of the base plate 22 is provided with a plurality of evenly distributed protruding pressing parts 3.
[0099] In some embodiments of this application, the cross-sectional area of each protruding pressing portion 3 gradually decreases in the direction away from the base plate 22.
[0100] For illustrative purposes, the structural shape, number, and arrangement of the protruding pressing parts 3 are not limited to this example.
[0101] In some embodiments of this application, such as Figure 6 As shown, the protruding pressing part 3 includes a plurality of transverse protruding pressing structures 31 arranged parallel to the length direction of the third blocking structure 23 and a plurality of longitudinal protruding pressing structures 32 arranged perpendicular to the length direction of the third blocking structure 23. Each transverse protruding pressing structure 31 and each longitudinal protruding pressing structure 32 is provided with a diversion channel 33.
[0102] Explanatoryly, the transverse convex pressing structure 31 and the longitudinal convex pressing structure 32 divide the soil under the coverage of the base plate 22 into multiple blocks, which helps to limit the soil from being squeezed out of the coverage of the base plate 22. Then, by setting up the diversion channel 33, the soil can move from the higher density block to the adjacent lower density block, thereby making the soil density in each block tend to be balanced.
[0103] Example 3:
[0104] like Figure 7As shown, a split type retaining wall comprises: each pile body 11 is provided with a pile cap 13 connected with a bottom plate 22 at the top end of each pile body 11;
[0105] The bottom plate 22 is provided with a first separation structure 4 at the position of the two edges of the third blocking structure 23, and the bottom plate 22 is also provided with a second separation structure 5 for separating the bottom plate 22 into a connection area 51 connected with the pile cap 13 and a non-connection area 52 outside the connection area 51.
[0106] Illustratively, the pile cap 13 is integrally formed with the pile body 11 by internal steel reinforcement connection and pouring of concrete, the high-strength steel bolt used for connecting the bottom plate 22 with the pile cap 13 passes through a steel sleeve as a positioning channel, the position of the steel sleeve of the bottom plate 22 is reserved when the reinforced concrete is prefabricated, and the steel sleeve of the pile cap 13 is tied on the internal steel reinforcement of the pile cap 13. The top of the bottom plate 22 at the position of the steel sleeve and the bottom of the pile cap 13 are both provided with steel plates as gaskets to make the structure force more uniform. After the high-strength threaded steel reinforcement is inserted into the steel sleeve, the two end nuts are fixed, and the anchoring connection is completed by grouting into the steel sleeve. Illustratively, the steel sleeve reserved hole position is used for prefabricating the reinforced concrete member of the bottom plate 22, the high-strength steel bolt hole position is reserved during the construction of the pile cap 13, and the hole positions of the bottom plate 22 and the pile cap 13 at the corresponding positions are aligned, and at least four symmetrical hole positions are provided on both sides of each pile cap 13.
[0107] Illustratively, the first separation structure 4 and the second separation structure 5, together with the third blocking structure 23, limit the soil in the corresponding non-connection area 52, and the soil pressed by the bottom plate 22 will not overflow the range of the non-connection area 52.
[0108] In some embodiments of the present application, the side walls of the two first separation structures 4 and the second separation structures 5, which are respectively close to the center of the bottom plate 22, are both inclined to the side away from the bottom surface of the bottom plate 22.
[0109] Illustratively, the inner side of the first separation structure 4 and the second separation structure 5, which are respectively inclined, forms a guide surface 6, and the first separation structure 4 and the second separation structure 5 press the soil into the non-connection area 52 within the coverage range of the bottom plate 22 under the guidance of the guide surface 6 when separating the soil, avoiding soil loss caused by itself during the separation process, and the guide surface 6 also has the effect of reducing resistance and helping the separation structure to invade the soil.
[0110] Construction steps:
[0111] According to the design hole positions of the bottom plate 22 and the pile cap 13, the reinforced concrete integral prefabricated structure of the bottom plate 22 and the second blocking structure 21, i.e. the cantilever part 2, is completed;
[0112] The pile body 11 excavation pile position and spacing are determined, the pile hole is formed by artificial hole digging and mechanical hole digging measures, and temporary support is provided to prevent hole collapse;
[0113] The pile body 11, the first blocking structure 12, the pile cap 13 template, the steel sleeve aligned with the hole position of the bottom plate 22 is bound in the pile cap 13 template, and then the reinforced concrete is integrally poured, namely the pile plate part 1;
[0114] After the lower structure concrete strength is formed, the rock-soil backfilling is carried out in the first blocking area 14, the corresponding space is dug out at the position corresponding to the third blocking structure 23 at the top of the rock-soil in the first blocking area 14, the third blocking structure 23 is placed into the position after the cantilever part 2 is hoisted, and the cantilever part 2 is anchored with the pile plate part 1 through the high-strength steel bolt at the reserved hole position of the pile cap 13;
[0115] The rock-soil backfilling is carried out in the second blocking area 24, and the backfilling is carried out to the top of the second blocking structure 21 according to the requirement.
[0116] The above is only a preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. A split retaining wall characterised in that: The utility model relates to a pile plate part (1) and the cantilever part (2) of setting on the upper end of pile plate part (1) are included; The pile plate part (1) includes a plurality of pile bodies (11) partially inserted into the foundation, a first blocking structure (12) connected to the part of the plurality of pile bodies (11) not inserted into the foundation to form a first blocking area (14); The cantilever part (2) includes a second blocking structure (21) arranged at the upper end of the first blocking structure (12) to form a second blocking area (24) above the first blocking area (14), and a bottom plate (22) arranged at the bottom of the second blocking structure (21) and subjected to extrusion by the soil in the first blocking area (14) and the soil in the second blocking area (24), wherein the bottom of the bottom plate (22) is provided with a protruding third blocking structure (23) on the side away from the second blocking structure (21).
2. The split retaining wall of claim 1, wherein, The bottom of the bottom plate (22) is provided with a plurality of uniformly distributed protruding pressing parts (3).
3. The split retaining wall of claim 2, wherein, The cross-sectional area of each protruding pressing part (3) gradually decreases in the direction away from the bottom plate (22).
4. The split retaining wall of claim 3, wherein, The protruding pressing part (3) includes a plurality of transverse protruding pressing structures (31) arranged parallel to the length direction of the third blocking structure (23) and a plurality of longitudinal protruding pressing structures (32) arranged perpendicular to the length direction of the third blocking structure (23), and each transverse protruding pressing structure (31) and each longitudinal protruding pressing structure (32) is provided with a shunt channel (33).
5. The split retaining wall of claim 1 wherein, The top end of each pile body (11) is provided with a pile cap (13) connected to the bottom plate (22). The bottom of the bottom plate (22) is provided with a first separation structure (4) at the position of the two edges perpendicular to the third blocking structure (23), and the bottom of the bottom plate (22) is further provided with a second separation structure (5) separating the bottom plate (22) into a connection area (51) connected to the pile cap (13) and a non-connection area (52) outside the connection area (51).
6. A split retaining wall according to claim 5 wherein, The side wall of each of the two first separation structures (4) and the second separation structure (5) corresponding to the center of the bottom plate (22) is inclinedly arranged away from the bottom surface of the bottom plate (22).
7. A split retaining wall according to any one of claims 1 to 6, wherein, The top surface of the bottom plate (22) is inclinedly arranged towards the side close to the second blocking structure (21).
8. A split retaining wall according to any one of claims 1 to 6, wherein, The second blocking structure (21) is inclinedly arranged towards the side of the third blocking structure (23).
9. A split retaining wall according to any one of claims 1 to 6, wherein, A reinforcing rib is arranged between the second blocking structure (21) and the bottom plate (22).
10. A split retaining wall according to any one of claims 1 to 6, wherein, Each pile body (11) and the first blocking structure (12) are integrally formed, and the second blocking structure (21), the bottom plate (22), and the third blocking structure (23) are integrally formed.