Basement outer wall and enclosure pile combined structure
By roughening the surface, applying sprayed concrete and installing reinforcing bars between the basement exterior wall and the retaining piles, combined with waterproof membrane and waterstop rings, the stability and waterproofing issues at the connection point were resolved, improving construction efficiency and waterproofing effectiveness.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN GEOKEY CONSTR GRP CO LTD
- Filing Date
- 2025-07-04
- Publication Date
- 2026-07-03
AI Technical Summary
In existing technologies, the connection between the basement exterior wall and the retaining pile is prone to cracks and loosening, resulting in unsatisfactory waterproofing performance, poor connection reliability, low construction efficiency, and high costs.
The connection strength is enhanced by roughening, wire mesh spraying and concrete installation, and rebar installation. A waterproof structure, including waterproof membrane and waterstop ring, is set between the retaining piles and the side wall to form an integral structure.
It improves the stability and waterproofing performance of the connection, shortens the construction period, reduces costs, and reduces the risk of leakage.
Smart Images

Figure CN224451722U_ABST
Abstract
Description
Technical Field
[0001] This utility model patent relates to the field of building construction technology, specifically to a structure combining basement exterior walls and retaining piles. Background Technology
[0002] In basement construction, the basement exterior walls and retaining piles are crucial components. Currently, the combined construction method for these two elements has several shortcomings. Firstly, construction efficiency needs improvement. In conventional construction processes, after the basement exterior walls and retaining piles are constructed separately, the connection process requires considerable time, such as cleaning the surface of the retaining piles and pre-treating the interface. This cumbersome procedure prolongs the overall construction period and increases costs. Secondly, waterproofing performance is unsatisfactory. The connection between the basement exterior walls and retaining piles is prone to becoming a weak point in waterproofing. Traditional waterproofing measures cannot guarantee the seal at the connection, allowing groundwater to easily seep into the basement and affect its normal use. Furthermore, the reliability of the connection is poor.
[0003] The existing construction structure cannot ensure that the basement exterior wall and retaining piles are tightly connected as a whole. Under the long-term influence of soil lateral pressure, groundwater pressure and building settlement, cracks and loosening may occur at the connection points, threatening the structural safety of the basement. Utility Model Content
[0004] The purpose of this utility model is to provide a structure combining the basement exterior wall and retaining piles, aiming to solve the problem that cracks and loosening may occur at the connection between the side wall and the retaining piles in the prior art.
[0005] This utility model is implemented as follows: the basement exterior wall combined with the retaining piles structure includes multiple retaining piles, a capping beam set on top of the retaining piles, and a side wall cast on one side of the multiple retaining piles. A support beam is cast on the side of the side wall away from the retaining piles, and a basement floor slab is cast on top of the support beam. A connection structure and a waterproof structure are provided between the side wall and the multiple retaining piles. The side wall forms an integral whole with the retaining piles through the connection structure. Diagonal tie bars are provided between the side wall and the basement floor slab and the bottom slab to form an anchor. The side wall is cast with waterproof concrete.
[0006] Preferably, the connection structure includes roughening the retaining piles, applying wire mesh and spraying concrete, and installing rebar.
[0007] Preferably, the roughening depth of the retaining piles is 5-10 mm, and the surface roughness Ra ≥ 2.5 mm.
[0008] Preferably, the concrete layer formed by the wire mesh shotcrete is composed of C20 concrete and has a thickness of 50mm.
[0009] Preferably, the rebar installation process includes drilling multiple rebar holes at the pile body of the retaining pile, and rebars are installed in the rebar holes.
[0010] Preferably, the diameter of the anchoring hole is 4-6 mm larger than the diameter of the anchoring rebar.
[0011] Preferably, the waterproof structure includes a waterproof membrane laid on the surface of the concrete layer after the wire mesh is installed and shotcrete is applied. The waterproof membrane is a self-adhesive modified bitumen polyester membrane. The overlap between the waterproof membranes is reinforced with double-layer adhesive, and the overlap width is ≥100mm.
[0012] Preferably, the space between the anchoring hole and the anchoring rebar is filled with anchoring adhesive, and a water-stop ring is provided at the opening of the anchoring hole. The water-stop ring is fitted onto the anchoring rebar and fits tightly against the opening of the anchoring hole.
[0013] Preferably, the inner side of the retaining pile with the shotcrete layer and the waterproof membrane together form the permanent support surface of the side wall formwork.
[0014] Preferably, the thickness of the waterproof membrane is 3mm.
[0015] Compared with existing technologies, the basement exterior wall and retaining pile combination structure provided by this utility model enhances the connection strength between the retaining piles and the basement exterior wall by roughening the retaining piles and applying mesh and shotcrete, thereby improving the overall stability of the structure. By using the mesh and shotcrete on the inside of the retaining piles and laying waterproof membrane as one side formwork, the formwork erection process is reduced, effectively shortening the construction cycle and reducing construction costs. Through a series of waterproofing measures, such as applying mesh and shotcrete, laying waterproof membrane, and setting water-stop rings at the connection between the retaining piles and the side wall, the impermeability of the basement side wall is significantly improved, and the risk of leakage is reduced. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the cross-sectional structure of the retaining piles, side walls, and waist beams of the basement exterior wall and retaining pile combined structure provided by this utility model.
[0017] Figure 2 This is a schematic diagram of the cross-sectional structure between the retaining piles, side walls and reinforcing bars of the basement exterior wall and retaining pile combined structure provided by this utility model.
[0018] Figure 3 This is a schematic diagram of the connection structure of the basement exterior wall and retaining pile combined structure provided by this utility model, including the reinforcing steel bars, waterstop ring, and retaining piles.
[0019] Explanation of reference numerals in the attached figures:
[0020] 1. Retaining piles; 2. Crown beam; 3. Reinforcing steel bars; 4. Side walls; 5. Waist beams; 6. Support beams; 7. Basement floor slabs; 8. Waterproof membrane; 9. Waterstop rings. Detailed Implementation
[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0022] The implementation of this utility model will be described in detail below with reference to specific embodiments.
[0023] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.
[0024] Reference Figure 1-3 The image shown is a preferred embodiment of the present invention.
[0025] The basement exterior wall and retaining pile 1 combined structure includes multiple retaining piles 1, a capping beam 2 set on top of the retaining piles 1, and a side wall 4 cast on one side of the multiple retaining piles 1. A support beam 6 is cast on the side of the side wall 4 away from the retaining piles 1. The basement floor slab 7 is cast on top of the support beam 6. A connection structure and a waterproof structure are set between the side wall 4 and the multiple retaining piles 1. The side wall 4 forms an integral whole with the retaining piles 1 through the connection structure. Diagonal tie bars are set between the side wall 4 and the basement floor slab 7 and the bottom slab to form an anchor. The connection structure includes roughening the retaining piles 1, hanging wire mesh and spraying concrete and planting rebar. The side wall is cast with waterproof concrete.
[0026] By roughening the retaining piles 1 and applying shotcrete and mesh reinforcement, the connection strength between the retaining piles 1 and the basement exterior wall was enhanced, improving the overall stability of the structure. Using shotcrete and mesh reinforcement and waterproof membrane 8 on the inner side of the retaining piles 1 as one side formwork reduced the formwork erection process, effectively shortened the construction period, and reduced construction costs. By taking a series of waterproofing measures at the connection between the retaining piles 1 and the side wall 4, such as applying shotcrete and mesh reinforcement, laying waterproof membrane 8, and setting water-stop rings 9 at the rebar holes, the impermeability of the basement side wall 4 was significantly improved, reducing the risk of leakage.
[0027] Specifically, in this embodiment, the roughening depth of the retaining pile 1 is 5-10mm. The surface roughness Ra≥2.5mm ensures that the surface of the retaining pile 1 is rough, which facilitates subsequent mesh hanging and connection.
[0028] Specifically, in this embodiment, the concrete layer formed by the wire mesh shotcrete is composed of C20 concrete with a thickness of 50mm.
[0029] Specifically, in this embodiment, the rebar installation process includes drilling multiple rebar holes at the pile body of the retaining pile 1, with rebar 3 installed in the rebar holes. The diameter of the rebar holes is 4-6 mm larger than the diameter of the rebar 3, which facilitates the subsequent binding and connection of the side wall 4 rebars with the rebar 3 to form a stable rebar skeleton.
[0030] Specifically, in this embodiment, the waterproof structure includes a waterproof membrane 8 laid on the surface of the concrete layer after the wire mesh is sprayed. The waterproof membrane 8 is a self-adhesive modified asphalt polyester. The overlap between the waterproof membranes 8 is thickened with double-layer adhesive, and the overlap width is ≥100mm, which can effectively ensure the waterproof effect.
[0031] Specifically, in this embodiment, the space between the anchoring hole and the anchoring steel bar 3 is filled with anchoring adhesive, and a water-stop ring 9 is provided at the opening of the anchoring hole. The water-stop ring 9 is fitted onto the anchoring steel bar 3 and fits tightly against the opening of the anchoring hole.
[0032] The amount of adhesive injected into the anchoring hole should be such that the adhesive can be moved out of the hole after the anchoring rebar 3 is inserted. After the adhesive overflows, quickly pass the water-swellable sealing ring 9 through the anchoring rebar 3 to make it fit tightly against the hole, prevent the adhesive from flowing out, and ensure that the adhesive is fully bonded to the hole wall and the rebar.
[0033] Specifically, in this embodiment, the inner side of the retaining pile 1 with the shotcrete layer and the waterproof membrane 8 together form the permanent support surface of the side wall 4 formwork, which can be used as a side formwork, reducing the amount of formwork used and the formwork erection time.
[0034] Specifically, in this embodiment, the thickness of the waterproof membrane 8 is 3mm.
[0035] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A basement outer wall and retaining pile combined structure, characterized by, It includes multiple retaining piles, a capping beam set on top of the retaining piles, and a side wall cast on one side of the multiple retaining piles. A supporting beam is cast on the side of the side wall away from the retaining piles, and a basement floor slab is cast on top of the supporting beam. A connection structure and a waterproof structure are set between the side wall and the multiple retaining piles. The side wall forms an integral whole with the retaining piles through the connection structure. Diagonal tie bars are set between the side wall and the basement floor slab and the bottom slab to form an anchor. The side wall is cast with waterproof concrete.
2. The basement exterior wall and enclosure pile combined structure according to claim 1, wherein, The connection structure includes roughening the retaining piles, applying wire mesh and spraying concrete, and installing rebar.
3. The basement exterior wall and enclosure pile combined structure according to claim 2, wherein, The roughening depth of the retaining piles is 5-10mm, and the surface roughness Ra≥2.5mm.
4. The basement exterior wall and enclosure pile combined structure according to claim 2, wherein The concrete layer formed by the wire mesh sprayed concrete is composed of C20 concrete and has a thickness of 50mm.
5. The basement exterior wall and enclosure pile combined structure according to claim 2, wherein The rebar installation process includes drilling multiple rebar holes in the pile body of the retaining pile, and rebars are installed in the rebar holes.
6. The basement exterior wall and enclosure pile combined structure according to claim 5, wherein, The diameter of the anchoring hole is 4-6 mm larger than the diameter of the anchoring rebar.
7. The basement exterior wall and enclosure pile combination structure according to claim 1, wherein The waterproof structure includes a waterproof membrane laid on the surface of the concrete layer after the wire mesh is installed and shotcrete is applied. The waterproof membrane is a self-adhesive modified bitumen polyester membrane. The overlap between the waterproof membranes is reinforced with double-layer adhesive, and the overlap width is ≥100mm.
8. The basement exterior wall and enclosure pile combined structure according to claim 5, wherein, The space between the anchoring hole and the anchoring rebar is filled with anchoring adhesive. A water-stop ring is installed at the opening of the anchoring hole, and the water-stop ring is fitted onto the anchoring rebar and fits tightly against the opening of the anchoring hole.
9. The basement exterior wall and enclosure pile combination structure according to claim 2, wherein The inner side of the retaining piles, along with the sprayed concrete layer and waterproof membrane, together form the permanent support surface of the side wall formwork.
10. The basement exterior wall and enclosure pile combination structure according to claim 7, wherein The thickness of the waterproof membrane is 3mm.