Underground structure deformation joint waterproof structure
By installing a multi-layered waterproofing structure consisting of a waterstop plate, waterstop sealant, and sealing strip in the expansion joints of underground structures, the problems of weak waterproofing capacity and low construction efficiency of the expansion joints of underground structures are solved, achieving a highly efficient waterproofing effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SINOHYDRO BUREAU 8 CO LTD
- Filing Date
- 2025-05-19
- Publication Date
- 2026-05-12
AI Technical Summary
In existing technologies, the waterproofing capacity of expansion joints in underground structures is weak, and the construction efficiency is low, making it impossible to effectively solve the problem of water leakage.
A first and second waterstop plate are installed between the first and second concrete pours. Water-stop sealant is applied between the waterstop plates. Deformation bladders and sealing strips filled with internal medium are installed above and below the expansion joint to form a multi-layer waterstop structure, avoiding the need to fill the expansion joint with waterproof material.
It improves construction efficiency, reduces construction steps, enhances waterproofing, and effectively prevents water leakage through multiple water-stopping structures.
Smart Images
Figure CN224227861U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of waterproof structure technology, specifically to a waterproof structure for expansion joints in underground structures. Background Technology
[0002] In underground stations of rail transit projects or other underground reinforced concrete structures, expansion joints are generally provided between the main structure and auxiliary structures, between structures with large differences in form, and between structures with large differences in bearing foundation. However, underground structures are affected by surface water and groundwater, and the locations of expansion joints are high-risk areas for water leakage. Due to the limitations of the expansion joint technology, their waterproofing ability is weak, and there is currently no good solution.
[0003] Chinese patent document with application number 202110540599.8 discloses a waterproof structure for the expansion joint of the roof slab in a subway main structure. It includes two main roof slabs located on either side of the expansion joint. A steel-edged rubber waterstop is positioned in the middle of the expansion joint, with its two sides extending into the two main roof slabs respectively. A waterproof mortar injection molding layer and a sealant layer are provided above and below the steel-edged rubber waterstop in the expansion joint. The waterproof mortar injection molding layer is located between the steel-edged rubber waterstop and the sealant layer, and both the waterproof mortar injection molding layer and the sealant layer are bonded to the two main roof slabs. The shortcomings of this waterproof structure for the expansion joint of the subway main structure are: firstly, the expansion joint needs to be formed before the waterproof material is filled into it, meaning that when pouring the main structure on the other side, a formwork needs to be erected inside the expansion joint, affecting the construction efficiency of the main structure; secondly, leaks are easily created between the waterproof material and the main structure, resulting in poor waterproofing performance. Utility Model Content
[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a waterproof structure for underground structural expansion joints that improves overall construction efficiency and waterproofing effect.
[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:
[0006] A waterproof structure for an underground structural expansion joint includes a pre-cast concrete body, a post-cast concrete body, and an expansion joint formed between the pre-cast and post-cast concrete bodies. The pre-cast concrete body has a first waterstop plate on one side of the expansion joint, and the post-cast concrete body has a second waterstop plate on one side of the expansion joint. Waterstop sealant is provided in the middle of the first and second waterstop plates, with mutually pressing sealant mortar. Expansion joint has expansion bladders filled with a medium above and below the sealant mortar, which are tightly pressed between the first and second waterstop plates. A backwater sealing strip and a frontwater sealing strip are provided at the upper and lower openings of the expansion joint, respectively, both tightly pressed between the first and second waterstop plates.
[0007] As a further improvement to the above technical solution:
[0008] The first waterstop plate has a first outward protrusion strip protruding into the expansion joint in the middle part, and the second waterstop plate has a second outward protrusion strip protruding into the expansion joint in the middle part, and the waterstop putty is pressed between the first outward protrusion strip and the second outward protrusion strip.
[0009] Water-stopping putty on the first protruding strip is applied to the first protruding strip, and water-stopping putty on the second protruding strip is applied to the second protruding strip.
[0010] The deformable bladder band is bonded to the first waterstop plate and the second waterstop plate.
[0011] The first waterstop plate has a first upper suspension plate and a first lower suspension plate that extend into the expansion joint at its upper and lower ends, respectively. The second waterstop plate has a second upper suspension plate and a second lower suspension plate that extend into the expansion joint at its upper and lower ends, respectively. The backwater sealing strip is clamped between the first upper suspension plate and the second upper suspension plate, and the frontwater sealing strip is clamped between the first lower suspension plate and the second lower suspension plate.
[0012] The backwater sealing strip is provided with first slots on both sides, and the first upper suspension plate and the second upper suspension plate are respectively locked in the corresponding first slots. The frontwater sealing strip is provided with second slots on both sides, and the first lower suspension plate and the second lower suspension plate are respectively locked in the corresponding second slots.
[0013] The first waterstop plate has a first upper waterstop wing plate, a first middle waterstop wing plate, and a first lower waterstop wing plate respectively extending away from the deformation joint in the upper, middle and lower parts. The first upper waterstop wing plate is pressed on the top surface of the first poured concrete body, the first middle waterstop wing plate is embedded in the first poured concrete body, and the first lower waterstop wing plate is pressed on the bottom surface of the first poured concrete body.
[0014] The first water-swellable water-stop strip is provided between the first water-stop plate and the first intermediate water-stop wing plate and the first poured concrete body.
[0015] The upper, middle and lower parts of the second waterstop plate are respectively provided with a second upper waterstop wing plate, a second middle waterstop wing plate and a second lower waterstop wing plate that protrude away from the deformation joint. The second upper waterstop wing plate is pressed on the top surface of the post-cast concrete body, the second middle waterstop wing plate is embedded in the post-cast concrete body, and the second lower waterstop wing plate is pressed on the bottom surface of the post-cast concrete body.
[0016] A second water-swellable waterstop strip is provided between the second waterstop plate, the second intermediate waterstop wing plate and the post-poured concrete body.
[0017] Compared with the prior art, the advantages of this utility model are:
[0018] The construction process of the waterproof structure for the expansion joint of the underground structure according to this utility model is as follows: When pouring the first concrete, the first waterstop is attached to the end face of the first concrete (or the first waterstop can be used as a template for the end face of the first concrete, and demolding is not required later); then, the expansion joint strip and the waterstop sealant are attached to the side of the first waterstop away from the first concrete; then, the second waterstop is attached to the expansion joint strip, and the waterstop sealant on the second waterstop is attached to the waterstop sealant on the first waterstop, while the second waterstop and the first waterstop are arranged opposite each other and a water-facing sealing strip is sandwiched between the bottom of the first waterstop and the second waterstop; then, a water-repellent sealing strip is sandwiched between the top of the first waterstop and the second waterstop; finally, the subsequent concrete is poured on the side of the second waterstop away from the first concrete. The waterproofing structure for underground structural expansion joints has several advantages. First, it eliminates the need for pre-cast and post-cast concrete sections, forming an expansion joint between them and then filling it with waterproofing material. Instead, the structure is erected between the pre-cast and post-cast concrete sections to create the expansion joint. This eliminates the need for formwork within the expansion joint during the post-cast concrete pouring, improving overall construction efficiency. Second, the structure utilizes five layers of waterproofing—a sealing strip on the water-facing side, a lower expansion joint, a waterproof sealant, an upper expansion joint, and a sealing strip on the back side—to create a stronger waterproofing effect. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the waterproof structure for underground structural expansion joints of this utility model.
[0020] Figure 2 yes Figure 1 A magnified structural diagram of point A in the middle.
[0021] Figure 3 yes Figure 1 A magnified structural diagram at point B in the middle.
[0022] Figure 4 This is a schematic diagram of the installation of the first waterstop plate in the waterproof structure of the underground structure expansion joint of this utility model.
[0023] Figure 5 This is a schematic diagram of the installation of the deformation bladder belt of the waterproof structure for underground structural expansion joints according to this utility model.
[0024] Figure 6 This is a schematic diagram of the installation of the second waterstop plate and the water-facing sealing strip of the waterproof structure for the expansion joint of the underground structure according to this utility model.
[0025] Figure 7 This is a schematic diagram of the installation of the backwater sealing strip of the waterproof structure for underground structural expansion joints of this utility model.
[0026] The labels in the diagram represent:
[0027] 1. First pour concrete; 2. Second pour concrete; 3. Expansion joint; 4. First waterstop plate; 41. First protruding strip; 42. First upper suspended plate; 43. First lower suspended plate; 44. First upper waterstop wing plate; 45. First intermediate waterstop wing plate; 46. First lower waterstop wing plate; 47. First water-swellable waterstop strip; 5. Second waterstop plate; 51. Second protruding strip; 52. Second upper suspended plate; 53. Second lower suspended plate; 54. Second upper waterstop wing plate; 55. Second intermediate waterstop wing plate; 56. Second lower waterstop wing plate; 57. Second water-swellable waterstop strip; 6. Waterstop putty; 7. Deformation bladder strip; 8. Backwater sealing strip; 81. First groove; 9. Water-facing sealing strip; 91. Second groove. Detailed Implementation
[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0029] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying 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, they should not be construed as limitations on this utility model.
[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0032] Figures 1 to 7 This invention illustrates an embodiment of the waterproof structure for underground structural expansion joints. The waterproof structure includes a pre-cast concrete body 1, a post-cast concrete body 2, and an expansion joint 3 formed between the pre-cast concrete body 1 and the post-cast concrete body 2. The pre-cast concrete body 1 has a first waterstop plate 4 on one side of the expansion joint 3, and the post-cast concrete body 2 has a second waterstop plate 5 on one side of the expansion joint 3. Waterstop sealant 6, which is mutually compressed, is provided in the middle portions of the first waterstop plate 4 and the second waterstop plate 5. Expansion joint 3 has expansion bladders 7 filled with internal media above and below the waterstop sealant 6, which are tightly squeezed between the first waterstop plate 4 and the second waterstop plate 5. A backwater sealing strip 8 and a frontwater sealing strip 9 are respectively provided at the upper and lower openings of the expansion joint 3, both tightly squeezed between the first waterstop plate 4 and the second waterstop plate 5.
[0033] The construction process of the waterproof structure for the expansion joint of the underground structure according to this utility model is as follows: When pouring the first concrete body 1, the first waterstop 4 is attached to the end face of the first concrete body 1 (the first waterstop 4 can also be used as a template for the end face of the first concrete body 1, and the template does not need to be removed later). Figure 4 As shown; next, the deformation bladder 7 and the water-stopping putty 6 are respectively attached to the side of the first water-stopping plate 4 away from the first poured concrete body 1, as shown. Figure 5 As shown; then, the second waterstop 5 is attached to the deformable bladder belt 7, and the waterstop putty 6 on the second waterstop 5 and the waterstop putty 6 on the first waterstop 4 are attached together. At the same time, the second waterstop 5 and the first waterstop 4 are arranged opposite to each other, and a water-facing sealing strip 9 is sandwiched between the bottom of the first waterstop 4 and the second waterstop 5, as shown. Figure 6As shown; then, a backwater sealing strip 8 is sandwiched between the tops of the first waterstop plate 4 and the second waterstop plate 5, as shown. Figure 7 As shown; finally, the second waterstop 5 is poured on the side away from the first poured concrete body 1 to form the subsequent poured concrete body 2, as shown. Figure 1 As shown. This underground structure's waterproofing structure for expansion joints has several advantages. First, it eliminates the need for first-cast concrete 1 and subsequent-cast concrete 2, forming an expansion joint 3 between them before filling it with waterproofing material. Instead, the waterproofing structure is erected between the first-cast concrete 1 and subsequent-cast concrete 2 to form the expansion joint 3. This eliminates the need for formwork within the expansion joint 3 during the pouring of the subsequent concrete 2, improving overall construction efficiency. Second, the five layers of waterproofing—the water-facing sealing strip 9, the lower expansion joint 7, the water-stopping sealant 6, the upper expansion joint 7, and the backwater sealing strip 8—enhance the waterproofing effect.
[0034] Furthermore, in this embodiment, the first waterstop plate 4 has a first outward protrusion 41 protruding into the expansion joint 3 at its center, and the second waterstop plate 5 has a second outward protrusion 51 protruding into the expansion joint 3 at its center. The waterstop sealant 6 is pressed against the first outward protrusion 41 and the second outward protrusion 51. The first outward protrusion 41 and the second outward protrusion 51 can reduce the thickness of the waterstop sealant 6 and improve its strength. Preferably, the waterstop sealant 6 is a silicone oil fly ash sealant.
[0035] Furthermore, in this embodiment, the waterproof sealant 6 on the first protruding strip 41 is applied to the first protruding strip 41, and the waterproof sealant 6 on the second protruding strip 51 is applied to the second protruding strip 51, which facilitates construction.
[0036] Furthermore, in this embodiment, the deformable bladder band 7 is bonded to the first waterstop plate 4 and the second waterstop plate 5, which facilitates the sequential assembly and construction of the first waterstop plate 4, the deformable bladder band 7, and the second waterstop plate 5.
[0037] Furthermore, in this embodiment, the upper and lower ends of the first waterstop plate 4 are respectively provided with a first upper suspension plate 42 and a first lower suspension plate 43 extending into the deformation joint 3, and the upper and lower ends of the second waterstop plate 5 are respectively provided with a second upper suspension plate 52 and a second lower suspension plate 53 extending into the deformation joint 3. The backwater sealing strip 8 is clamped between the first upper suspension plate 42 and the second upper suspension plate 52, and the frontwater sealing strip 9 is clamped between the first lower suspension plate 43 and the second lower suspension plate 53. On the one hand, this improves the clamping and sealing effect of the backwater sealing strip 8 and the frontwater sealing strip 9; on the other hand, grooves are formed between the first upper suspension plate 42 and the first lower suspension plate 43 and the first protruding strip 41, and between the second upper suspension plate 52 and the second lower suspension plate 53 and the second protruding strip 51, for clamping the deformable airbag 7, thereby improving the clamping and water-stopping effect of the deformable airbag 7. Preferably, the deformable airbag 7 is a deformable rubber airbag.
[0038] Furthermore, such as Figure 2 and Figure 3 As shown, in this embodiment, the back-side sealing strip 8 has first slots 81 on both sides, and the first upper suspension plate 42 and the second upper suspension plate 52 are respectively engaged in the corresponding first slots 81. The front-side sealing strip 9 has second slots 91 on both sides, and the first lower suspension plate 43 and the second lower suspension plate 53 are respectively engaged in the corresponding second slots 91. This further improves the clamping and sealing effect of the back-side sealing strip 8 and the front-side sealing strip 9.
[0039] Furthermore, in this embodiment, the upper, middle, and lower parts of the first waterstop plate 4 are respectively provided with a first upper waterstop wing plate 44, a first middle waterstop wing plate 45, and a first lower waterstop wing plate 46 extending away from the deformation joint 3. The first upper waterstop wing plate 44 is pressed onto the top surface of the pre-cast concrete body 1, the first middle waterstop wing plate 45 is embedded in the pre-cast concrete body 1, and the first lower waterstop wing plate 46 is pressed onto the bottom surface of the pre-cast concrete body 1. Under the action of the first upper waterstop wing plate 44, the first middle waterstop wing plate 45, and the first lower waterstop wing plate 46, the water-stopping effect of the first waterstop plate 4 is improved.
[0040] Furthermore, in this embodiment, a first water-swellable water-stop strip 47 is provided between the first water-stop plate 4 and the first intermediate water-stop wing plate 45 and the first poured concrete body 1, which further improves the water-stopping effect at the joint between the first water-stop plate 4 and the first poured concrete body 1.
[0041] Furthermore, in this embodiment, the upper, middle, and lower parts of the second waterstop plate 5 are respectively provided with a second upper waterstop wing plate 54, a second middle waterstop wing plate 55, and a second lower waterstop wing plate 56 extending away from the deformation joint 3. The second upper waterstop wing plate 54 is pressed onto the top surface of the post-cast concrete body 2, the second middle waterstop wing plate 55 is embedded in the post-cast concrete body 2, and the second lower waterstop wing plate 56 is pressed onto the bottom surface of the post-cast concrete body 2. Under the action of the second upper waterstop wing plate 54, the second middle waterstop wing plate 55, and the second lower waterstop wing plate 56, the water-stopping effect of the second waterstop plate 5 is improved.
[0042] Furthermore, in this embodiment, a second water-swellable water-stop strip 57 is provided between the second water-stop plate 5 and the second intermediate water-stop wing plate 55 and the post-cast concrete body 2, which further improves the water-stopping effect at the joint between the second water-stop plate 5 and the post-cast concrete body 2.
[0043] Preferably, the first waterstop plate 4, the first upper waterstop wing plate 44, the first middle waterstop wing plate 45, the first lower waterstop wing plate 46, the second waterstop plate 5, the second upper waterstop wing plate 54, the second middle waterstop wing plate 55, and the second lower waterstop wing plate 56 are all carbon fiber plates.
[0044] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the present invention, or modify it into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.
Claims
1. A waterproof structure for expansion joints in underground structures, characterized in that: The system includes a pre-cast concrete body (1), a post-cast concrete body (2), and a deformation joint (3) formed between the pre-cast concrete body (1) and the post-cast concrete body (2). The pre-cast concrete body (1) is provided with a first waterstop plate (4) on one side of the deformation joint (3), and the post-cast concrete body (2) is provided with a second waterstop plate (5) on one side of the deformation joint (3). The first waterstop plate (4) and the second waterstop plate (5) are respectively provided with mutually pressing stop in the middle part. Water-based sealant (6), the expansion joint (3) is provided with expansion bladders (7) filled with medium above and below the water-stop sealant (6), the expansion bladders (7) are squeezed between the first water-stop plate (4) and the second water-stop plate (5), the upper and lower openings of the expansion joint (3) are provided with back water sealing strips (8) and front water sealing strips (9), the back water sealing strips (8) and the front water sealing strips (9) are squeezed between the first water-stop plate (4) and the second water-stop plate (5).
2. The waterproof structure for underground structural expansion joints according to claim 1, characterized in that: The first waterstop plate (4) has a first outward protrusion strip (41) protruding into the deformation joint (3) in the middle part, and the second waterstop plate (5) has a second outward protrusion strip (51) protruding into the deformation joint (3) in the middle part, and the waterstop putty (6) is pressed between the first outward protrusion strip (41) and the second outward protrusion strip (51).
3. The waterproof structure for underground structural expansion joints according to claim 2, characterized in that: Water-stopping putty (6) on the first protruding strip (41) is applied to the first protruding strip (41), and water-stopping putty (6) on the second protruding strip (51) is applied to the second protruding strip (51).
4. The waterproof structure for underground structural expansion joints according to claim 1, characterized in that: The deformable bladder band (7) is bonded to the first waterstop plate (4) and the second waterstop plate (5).
5. The waterproof structure for underground structural expansion joints according to claim 1, characterized in that: The first waterstop plate (4) is provided with a first upper suspension plate (42) and a first lower suspension plate (43) that extend into the deformation joint (3) at its upper and lower ends, respectively. The second waterstop plate (5) is provided with a second upper suspension plate (52) and a second lower suspension plate (53) that extend into the deformation joint (3) at its upper and lower ends, respectively. The backwater sealing strip (8) is clamped between the first upper suspension plate (42) and the second upper suspension plate (52), and the frontwater sealing strip (9) is clamped between the first lower suspension plate (43) and the second lower suspension plate (53).
6. The waterproof structure for underground structural expansion joints according to claim 5, characterized in that: The backwater sealing strip (8) has a first slot (81) on each side, and the first upper suspension plate (42) and the second upper suspension plate (52) are respectively locked in the corresponding first slot (81). The frontwater sealing strip (9) has a second slot (91) on each side, and the first lower suspension plate (43) and the second lower suspension plate (53) are respectively locked in the corresponding second slot (91).
7. The waterproof structure for underground structural expansion joints according to any one of claims 1 to 6, characterized in that: The first waterstop plate (4) is provided with a first upper waterstop wing plate (44), a first middle waterstop wing plate (45) and a first lower waterstop wing plate (46) respectively extending away from the deformation joint (3) in the upper, middle and lower parts. The first upper waterstop wing plate (44) is pressed on the top surface of the first poured concrete body (1), the first middle waterstop wing plate (45) is embedded in the first poured concrete body (1), and the first lower waterstop wing plate (46) is pressed on the bottom surface of the first poured concrete body (1).
8. The waterproof structure for underground structural expansion joints according to claim 7, characterized in that: The first water-swellable water-stop strip (47) is provided between the first water-stop plate (4) and the first intermediate water-stop wing plate (45) and the first poured concrete body (1).
9. The waterproof structure for underground structural expansion joints according to any one of claims 1 to 6, characterized in that: The upper, middle and lower parts of the second waterstop plate (5) are respectively provided with a second upper waterstop wing plate (54), a second middle waterstop wing plate (55) and a second lower waterstop wing plate (56) that protrude away from the side away from the deformation joint (3). The second upper waterstop wing plate (54) is pressed on the top surface of the post-cast concrete body (2), the second middle waterstop wing plate (55) is embedded in the post-cast concrete body (2), and the second lower waterstop wing plate (56) is pressed on the bottom surface of the post-cast concrete body (2).
10. The waterproof structure for underground structural expansion joints according to claim 9, characterized in that: A second water-swellable water-stop strip (57) is provided between the second water-stop plate (5) and the second intermediate water-stop wing plate (55) and the post-cast concrete body (2).