Waterproof structure at pile wall overlapping position of subway station
By setting longitudinal and transverse water-stop glue strips at the overlapping of subway station walls, a closed and ring-shaped waterproof structure is formed, which solves the problem that traditional waterproof construction is difficult to prevent groundwater leakage, and achieves efficient waterproofing effect.
Patent Information
- Application Number
- CN202421034375.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-13
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-05-13
AI Technical Summary
At the overlapping of subway station walls, traditional waterproof construction is difficult to effectively prevent groundwater leakage, resulting in poor structural waterproofing effect.
A waterproof structure is adopted at the overlapping of subway station pile walls, including setting a longitudinal water stop glue strip at the joints of side walls, prefabricated square piles and cement mortar waterproof layer, and setting a transverse water stop glue strip on the surface of cement mortar waterproof layer to form a closed ring structure to block groundwater seepage.
It effectively improves the waterproofing effect of the subway station, avoids leakage at the pile wall overlap, is convenient to construct and low cost.
Smart Images
Figure CN222949063U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of waterproof construction of subway projects, in particular to a waterproof structure at the overlap of pile walls of a subway station. Background Art
[0002] With the development and promotion of prefabricated construction technology, the retaining piles in the construction of urban rail transit subway stations have gradually been prefabricated in factories and assembled on site, which has greatly improved construction efficiency and reduced environmental pollution. The pile-wall superposition of subway stations is a structural form in which the retaining piles of the station foundation pit are prefabricated square piles, which are effectively connected with the cast-in-place side walls of the main structure in the later stage to reduce the thickness of the structural side walls, thereby reducing the project cost.
[0003] The underground structure of a traditional subway station adopts structural self-waterproofing and full waterproofing with waterproof membranes. However, when the station structure is in the form of pile-wall overlap, shear connecting bars are added between the prefabricated square piles and the side walls. The full waterproofing with waterproof membranes is difficult to construct and cannot achieve a waterproof effect. Therefore, the utility model provides a subway station pile-wall overlap waterproofing structure to solve the waterproofing needs at the overlap of the pile walls of the subway station. Utility Model Content
[0004] The utility model aims to provide a waterproof structure for the overlapping part of pile walls of a subway station, so as to achieve the waterproof effect of the subway station and avoid leakage at the overlapping part of the pile walls.
[0005] To achieve the above purpose, the utility model provides the following solutions:
[0006] A waterproof structure for the overlapping part of piles and walls of a subway station, comprising a side wall, a prefabricated square pile connected to the side wall, a cement mortar waterproof layer arranged between adjacent prefabricated square piles and connected to the side wall, and a waterproof coating arranged on the connecting surface between the prefabricated square piles and the side wall and on the connecting surface between the cement mortar waterproof layer and the side wall; a longitudinal waterstop strip along the length direction of the prefabricated square pile is arranged at the joint where the side wall, the prefabricated square pile and the cement mortar layer are connected together; a plurality of transverse waterstop strips perpendicular to the length direction of the prefabricated square pile are arranged on the surface of the cement mortar layer, and both ends of the transverse waterstop strip are respectively connected to the longitudinal waterstop strip.
[0007] Preferably, a cap beam is provided on the top of the prefabricated square pile.
[0008] Preferably, three transverse water-stopping strips are provided, and the transverse water-stopping strips are respectively located at a position 500 mm below the crown beam, within a range of 1500 mm above and below the structural mid-plate, and at a position 500 mm above the bottom of the foundation pit.
[0009] Preferably, the thickness of the cement mortar waterproof layer is 20 mm to 25 mm.
[0010] Preferably, the area where the side wall is connected to the prefabricated square piles is set as a rough surface with a concave-convex difference of not less than 6 mm.
[0011] Compared with the prior art, the utility model has achieved the following technical effects:
[0012] 1. The utility model arranges longitudinal water-stopping adhesive at the joint between the cement mortar waterproof layer and the prefabricated square piles; transverse water-stopping adhesive is arranged on the surface of the cement mortar waterproof layer and is sealed into a ring with the longitudinal water-stopping adhesive to block the seepage of groundwater. The on-site construction is convenient and the cost is low. The waterproof effect of the subway station is effectively improved, and leakage at the overlap of the pile wall is avoided. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0014] Figure 1 It is a structural plan view of the utility model;
[0015] Figure 2 It is a structural longitudinal section diagram of the utility model;
[0016] Among them, 1-prefabricated square piles; 2-side walls; 3-waterproof coating; 4-longitudinal waterstop strips; 5-cement mortar waterproof layer; 6-crown beam; 7-transverse waterstop strips. DETAILED DESCRIPTION
[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0018] The utility model aims to provide a waterproof structure for the overlapping part of pile walls of a subway station, so as to achieve the waterproof effect of the subway station and avoid leakage at the overlapping part of the pile walls.
[0019] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0020] refer to Figure 1 to Figure 2, a waterproof structure for the overlap of pile walls in a subway station, comprising a side wall, a prefabricated square pile connected to the side wall, a cement mortar waterproof layer arranged between adjacent prefabricated square piles and connected to the side wall, and a waterproof coating arranged on the connection surface between the prefabricated square pile and the side wall and on the connection surface between the cement mortar waterproof layer and the side wall, wherein a longitudinal water-stopping glue strip along the length direction of the prefabricated square pile is arranged at the joint where the side wall, the prefabricated square pile and the cement mortar layer are connected together, and a plurality of transverse water-stopping glue strips perpendicular to the length direction of the prefabricated square pile are arranged on the surface of the cement mortar layer, and the two ends of the transverse water-stopping glue strip are respectively connected to the longitudinal water-stopping glue strip; the utility model arranges the longitudinal water-stopping glue at the joint between the cement mortar waterproof layer and the prefabricated square pile; the transverse water-stopping glue is arranged on the surface of the cement mortar waterproof layer and is sealed into a ring with the longitudinal water-stopping glue to block groundwater seepage, and the on-site construction is convenient and the cost is low, which effectively improves the waterproof effect of the subway station and avoids leakage at the overlap of the pile wall.
[0021] refer to Figure 2 A cap beam is set on the top of the prefabricated square pile.
[0022] refer to Figure 2 Three transverse water stop strips are provided, and the transverse water stop strips are respectively located at a position 500mm below the crown beam, within a range of 1500mm above and below the middle plate of the structure, and at a position 500mm above the bottom of the foundation pit.
[0023] Furthermore, the thickness of the cement mortar waterproof layer is 20 mm to 25 mm.
[0024] Furthermore, the area on the side wall where it is connected to the prefabricated square piles is set to a rough surface with a convex-concave difference of not less than 6 mm to ensure the connection strength between the side wall and the prefabricated square piles, and the waterproof coating is a cement-based penetrating crystalline waterproof coating.
[0025] refer to Figure 1 The side wall reinforcement is connected to the prefabricated square pile reinforcement through shear connecting bars.
[0026] The construction method of the utility model is as follows:
[0027] Before the excavation of the station foundation pit, the prefabricated square piles and other retaining structures are constructed. The foundation pit is excavated, and the waterproofing construction of the pile-wall overlap is carried out in sections according to the vertical segmentation of the station structure. First, a 20mm thick cement mortar waterproof layer is constructed between adjacent prefabricated square piles and leveled. The connection surface of the prefabricated square piles close to the side wall should be roughened and cleaned, and the surface should be moist and free of visible water. Then, a waterproof coating is applied to the connection surface and the cement mortar waterproof layer. The longitudinal water stop glue and the transverse water stop glue strip are extruded with a special glue injection gun and pasted on the surface of the construction joint. The cross-sectional size after curing is (8-10) × (18-20) mm. Finally, the shear connection reinforcement between the prefabricated square piles and the side wall is connected, the side wall reinforcement is tied, and the side wall concrete is poured.
[0028] Adaptive changes made according to actual needs are all within the protection scope of this utility model.
[0029] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numerals in the claims should not be regarded as limiting the claims involved.
Claims
1. A waterproof structure at the overlap of pile walls in a subway station, characterized in that: It includes side walls, prefabricated square piles connected to the side walls, a cement mortar waterproof layer arranged between adjacent prefabricated square piles and connected to the side walls, and a waterproof coating arranged on the connecting surfaces of the prefabricated square piles and the side walls and on the connecting surfaces of the cement mortar waterproof layer and the side walls. A longitudinal waterstop strip along the length direction of the prefabricated square piles is arranged at the joints where the side walls, the prefabricated square piles and the cement mortar waterproof layer are connected together. A plurality of transverse waterstop strips perpendicular to the length direction of the prefabricated square piles are arranged on the surface of the cement mortar waterproof layer, and both ends of the transverse waterstop strip are respectively connected to the longitudinal waterstop strip.
2. A waterproof structure for the overlapped part of pile walls in a subway station according to claim 1, characterized in that: A cap beam is arranged on the top of the prefabricated square pile.
3. A waterproof structure for the overlapped part of pile walls in subway stations according to claim 2, characterized in that: The transverse water-stopping rubber strips are provided in three rows, and are respectively located at a position 500 mm below the crown beam, within a range of 1500 mm above and below the structural mid-plate, and at a position 500 mm above the bottom of the foundation pit.
4. The waterproof structure at the overlap of pile walls in a subway station according to claim 1, characterized in that: The thickness of the cement mortar waterproof layer is 20 mm to 25 mm.
5. The waterproof structure at the overlap of pile walls in a subway station according to claim 1, characterized in that: The area where the side wall is connected to the prefabricated square piles is set as a rough surface with a concave-convex difference of not less than 6 mm.