Building expansion joint waterproof structure
By installing a filter frame and a wedge-shaped misaligned convex structure on the rubber water barrier, the problem of reduced waterproofing effect caused by soil accumulation is solved, the service life of the rubber water barrier is extended, and safety and waterproofing effect are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 张涛
- Filing Date
- 2025-06-10
- Publication Date
- 2026-05-15
AI Technical Summary
The existing rubber waterproofing plates of road expansion joints are prone to forming a water-blocking slope due to soil accumulation during rainy weather, which reduces the waterproofing effect and accelerates damage.
A filter frame is installed on a rubber water-blocking plate. The filter assembly is filled with coarse sand, fine sand, activated carbon, and cotton for filtering and adsorbing dust. At the same time, the wedge-shaped misaligned convex structure design reduces the misalignment gap and enhances stability and safety.
It effectively prevents soil accumulation, extends the life of the rubber water barrier, improves safety, reduces wheel damage, and enhances waterproofing.
Smart Images

Figure CN224243606U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building engineering technology, and in particular to a waterproof structure for building expansion joints. Background Technology
[0002] An expansion joint is a structural joint installed at an appropriate location along the construction joint direction of a building or structure to prevent cracks or damage to building components due to changes in climate and temperature. An expansion joint divides building components above the foundation, such as walls, floors, and roofs, into two independent parts, allowing the building or structure to expand and contract horizontally along its length.
[0003] Road expansion joints typically have a U-shaped rubber water barrier installed on the inner bottom. Although the U-shaped rubber water barrier can shrink well due to the thermal expansion and contraction of the road, there are many impurities on the road surface. When it rains, the soil on the road surface will fall onto the water barrier. Because the U-shaped structure of the water barrier makes the bottom of the water barrier relatively flat, the soil will accumulate on the water barrier. When the accumulation is excessive, the soil will form a water-blocking slope, thereby restricting the normal drainage of rainwater and causing the water barrier to crack and break. Utility Model Content
[0004] The purpose of this utility model is to solve at least one of the technical problems existing in the prior art and to provide a waterproof structure for building expansion joints. The device has a filter frame installed on the upper side of the rubber water-blocking plate. The filter component can effectively filter and adsorb dust in the water, which can effectively prevent the formation of a water-blocking slope on the rubber water-blocking plate due to mud, thereby preventing the waterproof rubber sleeve from being eroded and broken by impurities, and thus effectively improving the service life of the rubber water-blocking plate.
[0005] The device is equipped with a first misaligned protrusion and a second misaligned protrusion, both of which are wedge-shaped. Compared with the traditional square structure, the misalignment gap between the two shrinking extrusion plates is smaller, resulting in more expansion and contraction gaps, which effectively avoids damage to passing wheels and improves the safety of the device.
[0006] This utility model also provides a waterproof structure for building expansion joints as described above, comprising: a first concrete subgrade and a second concrete subgrade, wherein a first shrinkage extrusion plate is detachably connected to the upper side wall of the first concrete subgrade, and a plurality of first misaligned protrusions are intermittently fixedly connected to the right side wall of the first shrinkage extrusion plate; a second shrinkage extrusion plate is detachably connected to the upper side wall of the second concrete subgrade, and a plurality of second misaligned protrusions are intermittently fixedly connected to the left side wall of the second shrinkage extrusion plate; both the first misaligned protrusions and the second misaligned protrusions are wedge-shaped.
[0007] The upper sidewalls of the first and second concrete roadbeds are equipped with filter frames, the upper sidewalls of which are configured as connecting top plates, and the lower sidewalls of which are equipped with filter components. Rubber water-blocking plates are fixedly connected inside the first and second concrete roadbeds.
[0008] According to the aforementioned waterproof structure for building expansion joints, the rubber water-blocking plate is U-shaped to facilitate water drainage.
[0009] According to the aforementioned waterproof structure for building expansion joints, the interior of the filter assembly is filled with coarse sand, fine sand, activated carbon, and cotton from the outside to the inside. This effectively filters and adsorbs dust in the water, preventing the formation of a water-blocking slope on the rubber water-blocking board due to mud, thereby effectively improving the service life of the rubber water-blocking board.
[0010] According to the aforementioned waterproof structure for building expansion joints, a first misalignment groove is provided between adjacent first misalignment protrusions, and the first misalignment groove cooperates with the second misalignment protrusion to facilitate the cooperation between the first shrinkage extrusion plate and the second shrinkage extrusion plate.
[0011] According to the aforementioned waterproof structure for building expansion joints, a second misalignment groove is provided between adjacent second misalignment protrusions, and the first misalignment protrusion and the second misalignment groove cooperate to facilitate the cooperation between the first shrinkage extrusion plate and the second shrinkage extrusion plate.
[0012] According to the aforementioned waterproof structure for building expansion joints, the interior of the first shrinkage extrusion plate is provided with a plurality of first positioning holes, and the lower side wall of the first shrinkage extrusion plate is fixedly connected with a plurality of sets of first limiting protrusions. The first shrinkage extrusion plate is fixed to the first concrete subgrade through the first limiting protrusions and the first positioning holes, thereby improving the stability of the connection between the first shrinkage extrusion plate and the first concrete subgrade.
[0013] According to the aforementioned waterproof structure for building expansion joints, the interior of the second shrinkage extrusion plate is provided with a plurality of second positioning holes, and the lower side wall of the second shrinkage extrusion plate is fixedly connected with a plurality of sets of second limiting protrusions. The second shrinkage extrusion plate is fixed to the second concrete subgrade through the second limiting protrusions and the second positioning holes, thereby improving the stability of the connection between the second shrinkage extrusion plate and the second concrete subgrade.
[0014] According to the aforementioned waterproof structure for building expansion joints, a staggered gap is provided between the second shrinkage extrusion plate and the first shrinkage extrusion plate to facilitate the shrinkage of the expansion joint.
[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments;
[0017] Figure 1 This is a structural schematic diagram of a waterproof structure for building expansion joints according to the present invention;
[0018] Figure 2 This is a front view of a waterproof structure for building expansion joints according to the present invention;
[0019] Figure 3 This is a top view schematic diagram of a waterproof structure for building expansion joints according to the present invention;
[0020] Figure 4 This is a cross-sectional schematic diagram of a waterproof structure for building expansion joints according to the present invention.
[0021] Legend:
[0022] 1. First concrete subgrade; 2. First shrinkage extrusion plate; 201. First limiting protrusion; 202. First misalignment protrusion; 203. First misalignment groove; 204. First positioning hole; 205. Misalignment gap; 3. Second concrete subgrade; 4. Second shrinkage extrusion plate; 401. Second limiting protrusion; 402. Second misalignment protrusion; 403. Second misalignment groove; 404. Second positioning hole; 5. Rubber water-blocking plate; 6. Filter frame; 601. Connecting top plate; 602. Filter assembly. Detailed Implementation
[0023] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.
[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0025] Reference Figure 1-4 This utility model provides a waterproof structure for building expansion joints, comprising: a first concrete subgrade 1 and a second concrete subgrade 3. The upper sidewall of the first concrete subgrade 1 is detachably connected to a first shrinkage extrusion plate 2. The right sidewall of the first shrinkage extrusion plate 2 is intermittently fixedly connected to a plurality of first misaligned protrusions 202. The upper sidewall of the second concrete subgrade 3 is detachably connected to a second shrinkage extrusion plate 4. The left sidewall of the second shrinkage extrusion plate 4 is intermittently fixedly connected to a plurality of second misaligned protrusions 402. Both the first misaligned protrusions 202 and the second misaligned protrusions 402 are wedge-shaped. A misaligned gap 205 is provided between the second shrinkage extrusion plate 4 and the first shrinkage extrusion plate 2 to facilitate the shrinkage of the expansion joint.
[0026] A first misalignment groove 203 is provided between adjacent first misalignment protrusions 202. The first misalignment groove 203 cooperates with the second misalignment protrusion 402 to facilitate the cooperation between the first shrinking extrusion plate 2 and the second shrinking extrusion plate 4. A second misalignment groove 403 is provided between adjacent second misalignment protrusions 402. The first misalignment protrusion 202 cooperates with the second misalignment groove 403 to facilitate the cooperation between the first shrinking extrusion plate 2 and the second shrinking extrusion plate 4. The interior of the first shrinking extrusion plate 2 is provided with a plurality of first positioning holes 204. A plurality of sets of first limiting protrusions 201 are fixedly connected to the lower sidewall of the first shrinking extrusion plate 2. The first shrinkage extrusion plate 2 is fixed to the first concrete roadbed 1 through the first limiting protrusion 201 and the first positioning hole 204, thereby improving the stability of the connection between the first shrinkage extrusion plate 2 and the first concrete roadbed 1. The interior of the first shrinkage extrusion plate 2 is provided with a plurality of first positioning holes 204, and the lower side wall of the first shrinkage extrusion plate 2 is fixedly connected with a plurality of sets of first limiting protrusions 201. The first shrinkage extrusion plate 2 is fixed to the first concrete roadbed 1 through the first limiting protrusion 201 and the first positioning hole 204, thereby improving the stability of the connection between the first shrinkage extrusion plate 2 and the first concrete roadbed 1.
[0027] A filter frame 6 is installed on the upper sidewall of the first concrete roadbed 1 and the second concrete roadbed 3. The upper sidewall of the filter frame 6 is configured to connect to the top plate 601. A filter assembly 602 is installed on the lower sidewall of the top plate 601. A rubber water-blocking plate 5 is fixedly connected inside the first concrete roadbed 1 and the second concrete roadbed 3. The rubber water-blocking plate 5 is U-shaped to facilitate water drainage. The filter assembly 602 is filled with coarse sand, fine sand, activated carbon and cotton from the outside to the inside. It can effectively filter and adsorb dust in the water and effectively prevent the formation of a water-blocking slope on the rubber water-blocking plate 5 due to mud, thereby effectively improving the service life of the rubber water-blocking plate 5.
[0028] Working principle: The device has a filter frame 6 installed on the upper side of the rubber water-blocking plate 5. The filter component can effectively filter and adsorb dust in the water, which can effectively prevent the formation of a water-blocking slope on the rubber water-blocking plate 5 due to mud, thereby preventing the waterproof rubber sleeve from being corroded and broken by impurities, and thus effectively improving the service life of the rubber water-blocking plate 5. The device is equipped with a first misaligned protrusion 202 and a second misaligned protrusion 402. Both the first misaligned protrusion 202 and the second misaligned protrusion 402 are wedge-shaped. Compared with the traditional square structure, the misalignment gap between the two shrinking extrusion plates is smaller, resulting in more expansion and contraction gaps, thereby effectively preventing damage to passing wheels and improving the safety of the device.
[0029] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.
Claims
1. A waterproof structure for building expansion joints, characterized in that, include: The first concrete roadbed (1) and the second concrete roadbed (3) are provided. The upper side wall of the first concrete roadbed (1) is detachably connected to a first shrinkage extrusion plate (2). The right side wall of the first shrinkage extrusion plate (2) is intermittently fixedly connected to a plurality of first misaligned protrusions (202). The upper side wall of the second concrete roadbed (3) is detachably connected to a second shrinkage extrusion plate (4). The left side wall of the second shrinkage extrusion plate (4) is intermittently fixedly connected to a plurality of second misaligned protrusions (402). Both the first misaligned protrusions (202) and the second misaligned protrusions (402) are wedge-shaped. A filter frame (6) is installed on the upper side wall of the first concrete roadbed (1) and the second concrete roadbed (3). The upper side wall of the filter frame (6) is configured as a connecting top plate (601). A filter assembly (602) is installed on the lower side wall of the connecting top plate (601). A rubber water-blocking plate (5) is fixedly connected inside the first concrete roadbed (1) and the second concrete roadbed (3).
2. The waterproof structure for building expansion joints according to claim 1, characterized in that, The rubber water-blocking plate (5) is configured in a U-shape.
3. The waterproof structure for building expansion joints according to claim 1, characterized in that, The interior of the filter assembly (602) is filled from the outside in with coarse sand, fine sand, activated carbon and cotton.
4. The waterproof structure for building expansion joints according to claim 1, characterized in that, A first misalignment groove (203) is provided between adjacent first misalignment protrusions (202), and the first misalignment groove (203) cooperates with the second misalignment protrusion (402).
5. A waterproof structure for building expansion joints according to claim 1, characterized in that, A second misalignment groove (403) is provided between adjacent second misalignment protrusions (402), and the first misalignment protrusion (202) and the second misalignment groove (403) cooperate with each other.
6. A waterproof structure for building expansion joints according to claim 1, characterized in that, The first shrink extrusion plate (2) has a plurality of first positioning holes (204) inside. The lower side wall of the first shrink extrusion plate (2) is fixedly connected with a plurality of first limiting protrusions (201). The first shrink extrusion plate (2) is fixed to the first concrete roadbed (1) through the first limiting protrusions (201) and the first positioning holes (204).
7. A waterproof structure for building expansion joints according to claim 1, characterized in that, The second shrink extrusion plate (4) has several second positioning holes (404) inside. Several sets of second limiting protrusions (401) are fixedly connected to the lower side wall of the second shrink extrusion plate (4). The second shrink extrusion plate (4) is fixed to the second concrete subgrade (3) through the second limiting protrusions (401) and the second positioning holes (404).
8. A waterproof structure for building expansion joints according to claim 1, characterized in that, A misalignment gap (205) is provided between the second shrinking extrusion plate (4) and the first shrinking extrusion plate (2).