A drainage structure for construction joints in subway stations
By setting drainage trenches and drainage pipes at construction joints in subway stations, combined with permeable concrete and non-woven permeable geotextile, the problems of easy damage and unreliable installation of traditional waterproofing materials are solved, achieving efficient waterproofing and structural integrity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG DACHENG CONSTR GRP CO LTD
- Filing Date
- 2025-05-07
- Publication Date
- 2026-05-26
AI Technical Summary
Traditional waterproofing materials are prone to damage at construction joints in subway stations, are not securely installed, have difficulty in ensuring construction quality, are difficult to maintain, and have poor adaptability to structural deformation, resulting in poor waterproofing performance.
The construction joint is equipped with a drainage trench, with an internal drainage pipe wrapped with non-woven permeable geotextile and dense wire mesh, and covered with permeable concrete to form an effective drainage structure. The water-stop steel plate is tightly attached to the trench wall to ensure that water flows into the drainage pipe and is discharged.
It achieves the goals of preventing leakage, maintaining the integrity of the main structure, reducing later construction costs and maintenance difficulties, and improving adaptability to structural deformation.
Smart Images
Figure CN224281379U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of subway station construction technology, specifically relating to a drainage structure for subway station construction joints. Background Technology
[0002] Construction joints are typically set between the main structures of subway stations to prevent excessive deformation. Although leak-proof measures are taken at the construction joints, they are often sealed by means of materials such as water-stop steel plates and water-stop strips. This method has several shortcomings.
[0003] 1. The inherent limitations of the materials: Waterstop steel plates and waterstop strips may be damaged due to material aging, corrosion or external force, affecting their long-term waterproof performance.
[0004] 2. If the installation is not secure, the waterstop strip may shift or deform during the installation process. Especially during concrete pouring, the waterstop strip is easily squeezed or stretched by the concrete, resulting in a loose bond between it and the concrete, which can lead to leakage.
[0005] 3. The construction quality of waterstop steel plates and waterstop strips is difficult to guarantee. In actual construction, the positioning and fixing of waterstop steel plates and waterstop strips may not be precise enough, resulting in poor waterproofing effect.
[0006] 4. Difficult to maintain later. Once the waterstop steel plate or waterstop strip is damaged or leaks, it is difficult to repair. It requires a professional maintenance team and technical support. Moreover, since the waterstop steel plate is embedded in the concrete structure, the maintenance work will cause some damage to the building structure.
[0007] 5. Poor adaptability to structural deformation: During the operation of subway stations, the structure may undergo slight deformation due to external factors such as earthquakes and train vibrations. Traditional waterproofing materials are poorly adaptable to these deformations, which can easily lead to damage to the waterproofing layer. Utility Model Content
[0008] In view of the above-mentioned problems in the existing technology, the purpose of this utility model is to provide a drainage structure for construction joints in subway stations.
[0009] This utility model provides the following technical solution: a drainage structure for construction joints in subway stations, including a drainage reserved groove set at the construction joint of the main structure, a water-stop steel plate tightly attached to one side wall of the drainage reserved groove, a drainage pipe placed in the drainage reserved groove, a filling material between the drainage pipe and the bottom of the drainage reserved groove, and permeable concrete filled in the drainage reserved groove above the drainage pipe.
[0010] Furthermore, the drainage reserved groove is arranged longitudinally along the length direction of the main structure.
[0011] Furthermore, the water-stop steel plate is embedded in the main structure, and it is set close to the side wall of the drainage reserved groove and penetrates the drainage reserved groove.
[0012] Furthermore, a set of holes are opened on the wall of the drainage pipe, and the outside of the pipe is wrapped with a non-woven permeable geotextile, and the outside of the non-woven permeable geotextile is wrapped with a layer of dense wire mesh.
[0013] Furthermore, the holes are circular or polygonal, and a group of holes are arranged in a quincunx pattern.
[0014] Furthermore, the mesh size of the dense wire mesh is 3-5mm.
[0015] Furthermore, the wall thickness of the drain pipe is not less than 2mm.
[0016] By adopting the above-mentioned technology, the beneficial effects of this utility model compared with the prior art are as follows:
[0017] This invention effectively prevents the drainage pipe holes from being blocked by wrapping the surface of the drainage pipe with a layer of non-woven permeable geotextile and a dense wire mesh; by covering the upper side of the drainage pipe with permeable concrete and ensuring that the water-stop steel plate is tightly attached to the seepage pipe groove, water in the main structure can be effectively collected in the drainage pipe through the highly permeable concrete and then discharged through the drainage pipe; this invention avoids the need for secondary trenching for drainage when leakage occurs in subway stations, ensuring the integrity of the main structure and saving on subsequent construction costs. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the construction joint drainage structure of the subway station according to this utility model;
[0019] Figure 2 for Figure 1 Enlarged structural diagram at point A;
[0020] Figure 3 This is a schematic diagram of the structure of the drainage pipe of this utility model;
[0021] Figure 4 This is a schematic diagram of the arrangement of holes in the drainage pipe of this utility model. Detailed Implementation
[0022] 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 scope of the present utility model.
[0023] Conversely, this utility model encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this utility model as defined in the claims. Furthermore, to provide the public with a better understanding of this utility model, certain specific details are described in detail in the following description. However, those skilled in the art will fully understand this utility model even without these detailed descriptions.
[0024] Example:
[0025] like Figure 1-2 As shown, the drainage structure of the construction joint of the subway station includes the main structure 1, the drainage pipe reserved groove 2, the permeable concrete 4, the drainage pipe 7, and the filling material 8.
[0026] Specifically, the drainage pipe pre-reserved groove 2 is set on the lower side of the construction joint of the main structure 1. When the formwork of the main structure is erected, a drainage pipe pre-reserved groove 2 with a width × height of 50mm × 100mm is reserved at the construction joint for adding filling material, embedding the drainage pipe 7, and filling with permeable concrete 4. A water-stop steel plate 3 is installed close to the groove wall, and the water-stop steel plate 3 passes through the drainage pipe pre-reserved groove 2, connecting the upper and lower main structures at both ends. Then, the concrete of the main structure 1 is poured. When the concrete of the main structure 1 reaches the intermediate setting state (3-5 hours), the formwork of the drainage pipe pre-reserved groove 2 is removed, and then filling material 8 is added. The filling material 8 uses materials such as gypsum, cement mortar, and putty powder. After the filling is completed, the drainage pipe 7 is installed, and then the drainage pipe pre-reserved groove 2 is filled with permeable concrete 4.
[0027] The drainage pipe has a pre-reserved groove 2 with a width of 50mm and a height of 100mm. The materials used for the seepage pipe are PPR, PVC, HDPE, etc., with a pipe wall thickness of ≥2mm.
[0028] Specifically, such as Figure 3 As shown, the surface of the drainage pipe 7 is wrapped with a layer of non-woven permeable geotextile 6, and the surface of the non-woven permeable geotextile 6 is wrapped with a layer of dense wire mesh 5, the mesh size of which is 3-5mm. The dense wire mesh 5 can filter large-diameter materials, and the non-woven permeable geotextile 6 can filter small-diameter materials. Both of these can effectively prevent the drainage pipe holes from being blocked.
[0029] Specifically, such as Figure 4 As shown, the drain pipe 7 has multiple holes arranged in a quincunx pattern. The holes are located at one-third of the length of the upper side of the drain pipe. The holes are drilled using a drilling machine or an integrally formed perforated pipe is used before the pipe is buried. Water in the subsequent structure can flow into the drain pipe through the holes and then be discharged along the pipe.
[0030] The above description is only a preferred embodiment of the present utility model and is 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 subway station construction joint drainage structure, characterized by, The drainage reserved groove (2) is arranged at the construction joint of the main body structure, the side wall of one side of the drainage reserved groove (2) is tightly arranged with the water stop steel plate (3), the drainage pipe (7) is placed in the drainage reserved groove (2), the filling material (8) is arranged between the drainage pipe (7) and the bottom of the drainage reserved groove (2), and the pervious concrete (4) is filled in the drainage reserved groove (2) above the drainage pipe (7).
2. The subway station construction joint drainage structure according to claim 1, characterized in that, The drainage reserved groove (2) is longitudinally arranged along the length direction of the main body structure (1).
3. The subway station construction joint drainage structure according to claim 1, characterized in that, The water stop steel plate (3) is embedded in the main body structure (1), and is arranged through the drainage reserved groove (2) and tightly arranged with the side wall of one side of the drainage reserved groove (2).
4. The subway station construction joint drainage structure according to claim 1, characterized in that, A group of holes are arranged on the pipe wall of the drainage pipe (7), and the outer side of the drainage pipe (7) is wrapped with the non-woven fabric pervious geotextile (6), and the outer side of the non-woven fabric pervious geotextile (6) is wrapped with a layer of dense-mesh steel wire mesh (5).
5. The subway station construction joint drainage structure according to claim 4, characterized in that, The holes are circular or polygonal, and a group of holes are arranged in a quincunx shape.
6. The subway station construction joint drainage structure according to claim 4, characterized in that, The mesh size of the dense-mesh steel wire mesh (5) is 3-5 mm.
7. The subway station construction joint drainage structure according to claim 1, characterized in that, The wall thickness of the drainage pipe (7) is not less than 2 mm.