A bridge expansion joint water stop device

Abstract

The utility model discloses a bridge expansion joint's water stop device, features include multistage along the length direction of bridge expansion joint head -to -tail connected water stop unit, and water stop unit includes two support hanging plate, two connecting hanging plate and the open upward U shape elastic rubber water stop belt, two support hanging plate symmetrical fixed setting on the two side walls of bridge expansion joint, and the upper portion of each connecting hanging plate is suspended with the lower portion of corresponding one support hanging plate between through the suspension connection mechanism suspended connection, and the both sides of U shape elastic rubber water stop belt respectively upwards bending and through a plurality of detachable pressure device with the lower portion of one connecting hanging plate fixed seal connection, and the edge of the support hanging plate of two adjacent water stop units is mutually overlapped and fixedly connected between, and the edge of the U shape elastic rubber water stop belt of two adjacent water stop units is mutually overlapped and fixed seal connection between, advantage is convenient to install, easy to maintain, can gather and clean up sundries effectively and has strong adaptability.

Description

Technical Field

[0001] This utility model relates to a water-stopping structure for expansion joints, and more particularly to a water-stopping device for bridge expansion joints. Background Technology

[0002] Bridge expansion joints are important structures designed to accommodate displacement and deformation caused by factors such as temperature changes, concrete shrinkage and creep, and live loads. To prevent corrosive liquids such as rainwater and de-icing agents from seeping into the substructure of the bridge through expansion joints, which could cause damage such as bearing corrosion, concrete spalling, and steel reinforcement corrosion, thus affecting the safety and durability of the bridge structure, waterstops are usually installed at the expansion joints.

[0003] The existing bridge expansion joint waterstop technology and its main shortcomings are as follows:

[0004] (1) Traditional rubber waterstop: This is the most widely used type. However, in actual operation, it often fails to reach its designed lifespan. After damage, the waterstop function is lost, and when it is replaced, it seriously affects traffic.

[0005] (2) Embedded rubber waterstop: It is directly embedded in the structure of the expansion joint when pouring concrete. Its advantage is that it can form a good integrity with the concrete and has a good water-stopping effect under ideal conditions. However, once aging, tearing, joint cracking and other damages occur, resulting in leakage, its repair and replacement are extremely difficult. Usually, a large amount of concrete on both sides of the expansion joint needs to be removed, which causes great damage to the bridge structure. Moreover, the construction period is long, traffic needs to be closed for a long time, the maintenance cost is high, and the normal operation of the bridge is greatly affected.

[0006] (3) Back-mounted / external rubber waterstop: It is installed on the outer or inner surface of the expansion joint structure by means of adhesive or mechanical fixation (such as pressure plate). Its installation is relatively simpler than that of the embedded type, but the durability of its adhesive interface is often insufficient, and problems such as delamination and curling are prone to occur, leading to leakage. Even if mechanical pressing is used, replacement may be inconvenient due to factors such as corrosion of the original fasteners and unevenness of the structural surface. Moreover, the treatment of the old and new interfaces is still a difficult point, making it difficult to guarantee a long-term water-stopping effect.

[0007] (4) Steel-edged rubber waterstop: Steel edges are set on both sides of the rubber waterstop and the steel edges are fixed to the concrete structure by bolts to improve the connection and waterstop reliability; however, after the rubber body is damaged, the replacement also involves complex disassembly and installation procedures, especially when the fixing bolts are corroded or damaged, the replacement difficulty and cost are still high.

[0008] Furthermore, existing expansion joint structures are often directly exposed gaps, making it easy for debris such as sand, mud, and garbage brought in by vehicles to fall into and accumulate within them. This debris not only hinders the normal movement of the expansion joint, but more importantly, the hard debris, under the repeated crushing action of vehicle loads, can cause wear, punctures, or crushing damage to the waterstop (especially exposed or surface parts), significantly shortening its service life. Currently, there is a lack of effective and convenient debris removal mechanisms; manual cleaning is inefficient and difficult to thoroughly remove, and long-term accumulation of debris, due to its moisture content, exacerbates the erosion of the surrounding structure and the waterstop itself. Utility Model Content

[0009] The technical problem to be solved by this utility model is to provide a water-stopping device for bridge expansion joints that is easy to install, easy to maintain, can effectively collect and clean debris, and is highly adaptable.

[0010] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a water-stopping device for bridge expansion joints, comprising multiple water-stopping units connected end to end along the length of the bridge expansion joint. Each water-stopping unit includes two supporting plates, two connecting plates, and an upward-opening U-shaped elastic rubber water-stop strip. The two supporting plates are symmetrically fixedly installed on the two side walls of the bridge expansion joint. The upper part of each connecting plate is suspended and connected to the lower part of the corresponding supporting plate through a suspension connection mechanism. The two sides of the U-shaped elastic rubber water-stop strip are bent upwards and fixedly sealed to the lower part of the connecting plate through multiple detachable clamping devices. The edges of the supporting plates of two adjacent water-stopping units overlap and are fixedly connected, and the edges of the U-shaped elastic rubber water-stop strips of two adjacent water-stopping units overlap and are fixedly sealed.

[0011] Compared with the prior art, the advantages of this utility model are:

[0012] (1) Two supporting hanging plates, two connecting hanging plates and U-shaped elastic rubber waterstop together form an upward-opening U-shaped channel, which is used to collect debris and rainwater falling from the bridge deck into the bridge expansion joint. After the rainwater and debris fall into the bridge expansion joint, they will be collected by the upward-opening U-shaped elastic rubber waterstop. The U-shaped elastic rubber waterstop is usually made of rubber material. It can rely on its own elasticity and U-shaped structure to freely expand and contract when the bridge expands and deforms. It can always maintain effective close contact with both sides of the bridge expansion joint or adapt to deformation through its flexibility, thereby preventing water from seeping downward. In addition, since the U-shaped channel is upward-opening and easy to access, the cleaning work becomes simple and efficient, thus protecting the waterstop and maintaining the cleanliness and normal expansion and contraction function of the bridge expansion joint.

[0013] (2) The support plate and connecting plate are generally made of stainless steel, which provides a stable support surface for the U-shaped elastic rubber waterstop and further prevents corrosive liquids from contacting the lower structure.

[0014] (3) Since the U-shaped elastic rubber waterstop that plays the main water-stopping function is fixedly and sealed to the lower part of the connecting plate through a detachable clamping device, when the U-shaped elastic rubber waterstop ages or is damaged, it can be replaced simply by disassembling the detachable clamping device. The replacement process is quick and convenient.

[0015] (4) The upper part of the connecting plate and the lower part of the corresponding support plate are suspended and connected by a suspension connection mechanism. This suspension installation method can separate the installation process of the support plate and the fixing process between the connecting plate and the U-shaped elastic rubber waterstop. Then, the fixed connecting plate and the U-shaped elastic rubber waterstop are suspended and connected to the support plate after the fixed installation is completed by the suspension connection mechanism, thereby achieving rapid installation and making the installation process extremely convenient.

[0016] Preferably, the bottom of each supporting plate is folded upwards and outwards towards the bridge expansion joint to form a hanging bottom edge. The suspension connection mechanism is an upwardly inclined and fixed hanging angle fixed at the top of the connecting plate. The hanging angle opens downwards to form a suspension space with an included angle ranging from 10° to 45°. The hanging bottom edge of the supporting plate extends upwards into the suspension space and is suspended and connected to the hanging angle. This structure allows for quick and convenient installation and easy disassembly and replacement. The hanging angle has a small acute angle structure, and the suspension connection is achieved by the hanging bottom edge of the supporting plate extending upwards into the suspension space. The supporting plate is not easily detached from the suspension space, thus ensuring a long-term stable suspension effect.

[0017] Preferably, the detachable clamping device includes a fixing block, fixing bolts, and fixing nuts. The fixing bolts pass through the fixing block, the U-shaped elastic rubber waterstop, and the connecting plate sequentially from the outside to the inside, and are fixed and locked with the fixing nuts. The fixing block seals and presses the U-shaped elastic rubber waterstop tightly against the lower outer side of the connecting plate. When it is necessary to replace or maintain the U-shaped elastic rubber waterstop, simply remove the fixing block, fixing bolts, and fixing nuts to remove and replace the U-shaped elastic rubber waterstop. This eliminates the need to damage the main concrete structure of the bridge, greatly simplifying the maintenance process, shortening maintenance time, reducing maintenance costs, and minimizing traffic interruptions caused by maintenance.

[0018] Preferably, a strip-shaped fixing plate is fixedly connected to the upper outer side of the supporting plate along its length direction by multiple connecting rivets. Multiple fixing angle steels are fixedly arranged at intervals along the length direction on the strip-shaped fixing plate, and these fixing angle steels are fixedly connected to the bottom of the bridge beam by expansion bolts. The position and number of fixing angle steels are set according to the actual situation of the bridge structure and are fixedly connected to the strip-shaped fixing plate by conventional bolting or welding methods. This ensures a strong connection while minimizing the impact on the bridge structure itself. Furthermore, the connection angle between the fixing angle steel and the strip-shaped fixing plate can be adjusted according to the actual inclination state of the bridge structure where the bridge expansion joint is located, thus completing the fixed connection. The connection and installation are highly adaptable to various environments.

[0019] Preferably, the U-shaped elastic rubber waterstops in the multiple waterstop units form an inclined drainage channel with a slope ranging from 2% to 10%. This allows the collected water to be discharged promptly under the bridge, and the relatively small slope minimizes the impact of the flowing water on pedestrians and vehicles passing below.

[0020] Preferably, the overlapping portions between the edges of the support plates of two adjacent water-stop units are fixedly connected by connecting bolts or by welding, and the overlapping portions between the edges of the U-shaped elastic rubber waterstops of two adjacent water-stop units are sealed and fixedly connected by sealant. This ensures that the entire water-stop device has a good fixing effect, and the use of connecting bolts for fixing is more convenient for replacing individual water-stop units. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view of the overall structure of this utility model along the length of the bridge expansion joint;

[0022] Figure 2 This is a partial structural schematic diagram of the present invention;

[0023] Figure 3 This is a schematic diagram of the water-stopping unit of this utility model. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0025] Example 1: As Figures 1-3As shown, a water-stopping device for a bridge expansion joint includes multiple water-stopping units connected end-to-end along the length of the bridge expansion joint 1. Each water-stopping unit includes two supporting plates 2, two connecting plates 3, and an upward-opening U-shaped elastic rubber waterstop 4. Each U-shaped elastic rubber waterstop 4 is designed to be 2 meters long. The two supporting plates 2 are symmetrically fixed on the two side walls of the bridge expansion joint 1. The upper outer part of the supporting plates 2 is fixedly connected to a strip fixing plate 22 along the length direction by multiple connecting rivets 21. Multiple fixing angle steels 23 are fixedly fixed on the strip fixing plate 22 at intervals along the length direction. The fixing angle steels 23 are fixedly connected to the bottom of the bridge beam by expansion bolts 24. The upper part of each connecting plate 3 is connected to the lower part of the corresponding supporting plate 2. The components are suspended and connected by a suspension connection mechanism. The bottom of each supporting hanging plate 2 is folded upwards and outwards towards the bridge expansion joint 1 to form a hanging bottom edge 25. The suspension connection mechanism is a hanging angle 31 that is fixedly installed at the top of the connecting hanging plate 3 at an upward angle. The hanging angle 31 is a conventional angled hanging plate structure composed of three parts: a first hanging plate 311 connected to the top of the connecting hanging plate 3 at one end, an intermediate connecting plate 312 folded and connected to the other end of the first hanging plate 311 at one end, and a second hanging plate 313 folded and connected to the other end of the intermediate connecting plate 312. The hanging angle 31 opens downwards to form a suspension space 32 with an included angle of 15°. The hanging bottom edge 25 of the supporting hanging plate 2 extends upwards into the suspension space 32 and is suspended and connected to the hanging angle 31. The included angle of the suspension space 32 can also be any angle between 10° and 45°, as long as the hanging angle 31 can be stably suspended on the hanging bottom edge 25 of the supporting hanging plate 2. The overall structure of the supporting hanging plate 2 and the bottom edge 25, as well as the overall structure of the connecting hanging plate 3 and the connecting angle 31, are all made of thin metal plates with certain strength and toughness (such as Q235 steel plates or weathering steel plates, and are treated with anti-corrosion, such as hot-dip galvanizing or coating with anti-corrosion paint). Through the suspension connection between the supporting hanging plate 2 and the connecting hanging plate 3, not only is rigid support provided for the U-shaped elastic rubber waterstop 4 below, but its smooth and corrosion-resistant surface can also effectively prevent corrosive liquids from directly contacting the lower bridge structure.

[0026] The U-shaped elastic rubber waterstop 4 is bent upwards on both sides and fixedly sealed to the lower part of a connecting plate 3 by multiple detachable clamping devices. The edges of the supporting plates 2 of two adjacent waterstop units overlap and are fixedly connected by connecting bolts. The edges of the U-shaped elastic rubber waterstop 4 of two adjacent waterstop units overlap and the overlapping parts are sealed and fixedly connected by sealant. Here, the overlapping parts of the U-shaped elastic rubber waterstop 4 can also be further fixed on both sides of the overlapping parts of the edges of the U-shaped elastic rubber waterstop 4 by connecting steel plates and rivets or bolt and nut structures. The detachable clamping device includes a fixing block 51, a fixing bolt 52 and a fixing nut 53, such as Figure 2As shown, the fixing bolt 52 passes through the fixing block 51, the U-shaped elastic rubber waterstop 4, and the connecting plate 3 sequentially from the outside to the inside, and is fixed and locked with the fixing nut 53. The fixing block 51 seals and presses the U-shaped elastic rubber waterstop 4 tightly against the lower outer side of the connecting plate 3. Figure 3 As shown, the fixing bolt 52 passes through the fixing block 51, the connecting plate 3 and the U-shaped elastic rubber waterstop 4 from the outside to the inside and is fixed and locked with the fixing nut 53. The fixing block 51 seals and presses the connecting plate 3 against the lower outer side of the U-shaped elastic rubber waterstop 4. It can be seen that the inner and outer positions of the connecting plate 3 and the U-shaped elastic rubber waterstop 4 can be interchanged without affecting the actual use.

[0027] In practical applications, the U-shaped elastic rubber waterstop 4 is made of EPDM rubber or neoprene rubber with a width of 600mm and a thickness of 3mm. The U-shaped elastic rubber waterstop 4 has good elasticity and aging resistance, and its U-shaped structure allows it to adapt to the reciprocating expansion and contraction deformation of the bridge expansion joint 1. The fixing block 51 can be a strip of flat steel (e.g., a steel plate with a thickness of 3-5mm), which is fixed and locked by fixing bolts 52 passing through the pre-set holes on the fixing block 51, the U-shaped elastic rubber waterstop 4 and the connecting plate 3 from the outside to the inside, and fixing nuts 53, so as to firmly press and seal the U-shaped elastic rubber waterstop 4 to the lower outer side of the connecting plate 3. The fixing block 51 can also be multiple shorter stainless steel blocks arranged at intervals along the length of the U-shaped elastic rubber waterstop 4.

[0028] Example 2: The rest is the same as in Example 1, except that the U-shaped elastic rubber waterstop 4 in the multi-segment waterstop unit forms a continuous inclined drainage channel with a slope ranging from 2% to 10%. This allows the collected water to flow out from the lowest point of the drainage channel, and the smaller slope effectively reduces the impact on pedestrians or vehicles below.

[0029] Example 3: The rest is the same as in Example 1, except that the overlapping parts between the edges of the support plates 2 of the two adjacent water-stop units are fixedly connected by welding.

[0030] The working principle and maintenance process of the above embodiments are as follows:

[0031] When rainwater or other liquids flow downwards through the gaps in the bridge expansion joint 1, they first fall into the U-shaped channel formed by two supporting plates 2, two connecting plates 3, and a U-shaped elastic rubber waterstop 4. The U-shaped elastic rubber waterstop 4, with its elastic deformation capacity, effectively adapts to the opening and closing of the bridge expansion joint 1. Simultaneously, stones, mud, sand, garbage, and other debris falling from the bridge surface are also collected within the U-shaped elastic rubber waterstop 4, preventing these debris from directly impacting, abrading, or clogging the critical components at the bottom of the bridge expansion joint 1, and also preventing debris from affecting the normal deformation of the bridge expansion joint 1. During cleaning, maintenance personnel can easily inspect and remove the accumulated debris from the bridge surface or underneath (if conditions permit).

[0032] Maintenance and Replacement: When the U-shaped elastic rubber waterstop 4 ages or breaks due to long-term use, resulting in a decrease in its water-stopping effect, maintenance and replacement are very convenient. Maintenance personnel only need to unscrew the fixing bolts 52 and fixing nuts 53, remove the old fixing block 51 and the damaged U-shaped elastic rubber waterstop 4, then install the new U-shaped elastic rubber waterstop 4 as before, and finally tighten it again using the fixing block 51, fixing bolts 52, and fixing nuts 53. The entire process does not require large-scale excavation or damage to the main bridge structure, greatly shortening maintenance time and costs, and reducing the impact on traffic. The main metal support structures, such as the support plate 2 and connecting plate 3, are undamaged and can be reused for a long time.

[0033] The above embodiment, by designing the easily damaged U-shaped elastic rubber waterstop 4 as a module that can be easily disassembled and replaced, and combining the debris collection and easy cleaning function of the U-shaped groove structure, significantly improves the maintainability, durability and economy of the waterstop device of the entire bridge expansion joint 1. Its structure is relatively simple, easy to manufacture and install, and can be customized according to the actual size and conditions of different bridge expansion joints 1.

[0034] 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, improvements, etc., 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 water-stopping device for bridge expansion joints, characterized in that... The system comprises multiple water-stop units connected end-to-end along the length of the bridge expansion joint. Each water-stop unit includes two supporting plates, two connecting plates, and an upward-opening U-shaped elastic rubber waterstop. The two supporting plates are symmetrically fixed on the two side walls of the bridge expansion joint. The upper part of each connecting plate is suspended from the lower part of the corresponding supporting plate via a suspension connection mechanism. The two sides of the U-shaped elastic rubber waterstop are bent upwards and fixedly sealed to the lower part of the connecting plate via multiple detachable clamping devices. The edges of the supporting plates of two adjacent water-stop units overlap and are fixedly connected, and the edges of the U-shaped elastic rubber waterstops of two adjacent water-stop units overlap and are fixedly sealed.

2. The water-stopping device for bridge expansion joints according to claim 1, characterized in that... The bottom of each of the aforementioned support panels is folded upwards and outwards towards the bridge expansion joint to form a hanging bottom edge. The suspension connection mechanism is a hanging angle fixedly installed at the top of the connecting panel at an upward angle. The hanging angle opens downwards to form a suspension space with an included angle range of 10~45°. The hanging bottom edge of the support panel extends upwards into the suspension space and is suspended and connected to the hanging angle.

3. A water-stopping device for bridge expansion joints according to claim 1, characterized in that... The detachable clamping device includes a fixing block, a fixing bolt, and a fixing nut. The fixing bolt passes through the fixing block, the U-shaped elastic rubber waterstop, and the connecting plate from the outside to the inside, and is fixed and locked with the fixing nut. The fixing block seals and presses the U-shaped elastic rubber waterstop against the lower outer side of the connecting plate.

4. A water-stopping device for bridge expansion joints according to claim 1, characterized in that... The upper outer side of the support plate is fixedly connected to a strip fixing plate along the length direction by multiple connecting rivets. Multiple fixing angle steels are fixedly arranged at intervals along the length direction on the strip fixing plate. The fixing angle steels are fixedly connected to the bottom of the bridge beam by expansion bolts.

5. A water-stopping device for bridge expansion joints according to claim 1, characterized in that... The U-shaped elastic rubber waterstop in the multi-segment waterstop unit forms an inclined drainage channel, and the slope of the drainage channel ranges from 2% to 10%.

6. A water-stopping device for bridge expansion joints according to claim 1, characterized in that... The overlapping portions of the supporting plates of two adjacent water-stop units are fixedly connected by connecting bolts or by welding, and the overlapping portions of the U-shaped elastic rubber water-stop strips of two adjacent water-stop units are sealed and fixedly connected by sealant.

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