Pressurizing and leaking stoppage device for steel sheet pile cofferdam
By using a pressure-filling and leak-blocking device composed of support plates and water bags in the steel sheet pile cofferdam, the problem of water seepage in the lock gap is solved, and a simple and efficient leak-blocking effect and a safe construction process are achieved.
Patent Information
- Application Number
- CN202422075787.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-26
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-08-26
AI Technical Summary
During the construction process of existing steel sheet pile cofferdams, gaps are easily generated between the locks and lead to water seepage. The traditional sealing method is complex, low efficiency and high safety risks, especially in deep water conditions, which cannot effectively stop water.
A pressure-filling and leak-blocking device composed of a support plate and a water bag is used to insert the support plate into the steel sheet pile groove. The water bag is pressed against the gap by water to plug the leak. It uses the elasticity of the rubber material to adapt to deformation and is easy to install and dismantle through bolt fixing.
It achieves efficient and reliable water stopping effect, is easy to install, has high safety, and is reusable. It is suitable for a variety of cofferdam types, reducing construction costs and safety risks.
Smart Images
Figure CN223061627U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of cofferdam construction, and particularly relates to a steel sheet pile cofferdam pressurization and leak plugging device. Background Technique
[0002] For the construction of the underwater parts of buildings such as cross-river bridges and cross-river water conservancy aqueducts, generally, a cofferdam is first used to enclose the foundation pit to form a dry construction condition. Currently, the main types of cofferdams used are earth-rock cofferdams, concrete cofferdams, steel cofferdams, etc. Among them, steel sheet pile cofferdams are widely used in the construction of underwater buildings at home and abroad because of their advantages such as convenient construction, repeatable turnover, and less impact on the river ecosystem.
[0003] Such as Figure 1 and Figure 2 As shown, the steel sheet pile cofferdam uses the grooves on both sides of the steel sheet piles to bite each other to form a lock, and realizes water stop through the tight combination between the locks. During the construction of the steel sheet pile cofferdam, due to the vibration and collision during the driving process of the steel sheet piles, the action of the water head difference inside and outside the cofferdam, and the wear, corrosion, and deformation of the steel sheet pile grooves themselves, the locks cannot be completely tightly combined, and gaps are likely to be generated, thus forming a water seepage channel.
[0004] In the prior art, the sealing of the water seepage channel between the steel sheet pile locks is mainly carried out by filling materials such as cotton wadding, butter, and water stop rubber strips in the grooves in advance. During the initial drainage period of the steel sheet pile cofferdam, while pumping water, fine materials such as fine sand, bentonite, and sawdust are thrown along the joint position of the steel sheet piles, and are sucked into the lock openings of the steel sheet piles by the water pressure to achieve the purpose of leak plugging, or a paste-type water stop rubber strip is attached to the outer joint position of the steel sheet piles for sealing. The above technologies generally have the following defects:
[0005] 1. During the initial drainage and operation period of the foundation pit of the steel sheet pile cofferdam, due to the influence of factors such as water level change, waves, water flow, or impact of external floating objects, the steel sheet piles are prone to deformation. Therefore, the materials filled in the steel sheet pile grooves in advance or later may fall off, and the gaps between the steel sheet piles may further develop, resulting in repeated water seepage. Moreover, under deep water conditions, the method of throwing fine materials cannot cope with large water head pressures and cannot achieve the water stop effect.
[0006] 2. The water flow pattern in natural rivers is relatively complex, the flow velocity changes greatly, and the water flow is blocked by the steel sheet piles, making its flow pattern more chaotic. Therefore, most of the filled materials will be washed away by the water flow, and it is often necessary to repeat the throwing many times, which is complicated in operation, affects the construction efficiency, occupies a large amount of construction period, and the filled materials cannot be reused.
[0007] 3. For relatively large gaps, generally, divers need to dive to the water seepage position and deal with it by manually stuffing bentonite, cotton wadding, wooden wedges or pasting water stop rubber strips, which has a relatively high safety risk. Content of the Utility Model
[0008] The object of the present utility model is to provide a pressure - filling and leak - plugging device for a steel sheet pile cofferdam to solve the above - mentioned problems existing in the prior art.
[0009] To achieve the above object, the present utility model adopts the following technical solutions:
[0010] The present utility model provides a pressure - filling and leak - plugging device for a steel sheet pile cofferdam, including a support plate. One side of the support plate is provided with a water bag. The support plate is used to be inserted into the groove of the steel sheet pile to limit the water bag within the groove of the steel sheet pile. The top end of the support plate is provided with a flange connected to the groove wall of the steel sheet pile.
[0011] During its application, the support plate together with the water bag can be inserted into the groove of the steel sheet pile. The support plate is connected to the groove wall of the steel sheet pile through the flange at the top end of the support plate, so that the support plate limits the water bag within the groove of the steel sheet pile. Then, water is injected into the water bag. After the water bag expands, it closely adheres to the joint position of the steel sheet pile, and the leak at the joint position of the steel sheet pile is plugged through water pressure.
[0012] In a possible design, the cross - section of the support plate is arc - shaped, V - shaped, W - shaped or box - shaped. During its application, the stiffness of the support plate can be effectively improved, and the deformation of the support plate can be prevented.
[0013] In a possible design, the bottom end of the support plate is provided with a cutting edge. During its application, by setting a cutting edge at the bottom end of the support plate, it is convenient to insert the bottom of the support plate into the riverbed from the groove of the steel sheet pile.
[0014] In a possible design, flanges are provided on both sides of the top end of the support plate. During its application, by setting flanges on both sides of the top end of the support plate, the top of the support plate can be firmly connected to the top opening of the steel sheet pile.
[0015] In a possible design, screw holes matching bolts are provided on the flange, and the flange and the groove wall of the steel sheet pile are connected by bolts. During its application, by setting screw holes on the flange, it is convenient to firmly connect the flange and the groove wall of the steel sheet pile by bolts.
[0016] In a possible design, the water bag is connected with a water filling pipe, and one end of the water filling pipe is provided with a thread for connecting an external water pump. During its application, the thread of the water filling pipe can be connected to the external water pump, and water is quickly injected into the water bag through the external water pump.
[0017] In a possible design, a valve is provided on the water filling pipe. During its application, the on - off control of water injection and drainage of the water bag can be conveniently realized through the valve.
[0018] In a possible design, the water bag is made of rubber material. When it is applied, the water bag made of rubber material has good elasticity and is not easily damaged.
[0019] Beneficial effects:
[0020] 1. Easy to install. The utility model can be inserted by a vibratory hammer and fixed with bolts. The installation method is simple, the construction efficiency is high, the whole installation process is carried out on the top of the cofferdam, no underwater operation is required, and no additional installation equipment is needed during the installation process, reducing the use cost.
[0021] 2. High success rate of water stop and reliable leakage stoppage effect. The utility model stops water by the way that the water bag expands and closely adheres to the gap of the steel sheet pile lock. There are no special applicable requirements for the gap, depth, water flow conditions, etc. where water seepage occurs, and the water bag itself can change its shape with the deformation of the steel sheet pile and always closely adheres to the gap between the steel sheet pile locks. Therefore, even if the steel sheet pile undergoes secondary deformation, the water bag can still play the role of water stop.
[0022] 3. Can be reused repeatedly. The water bag of the utility model is made of rubber material, has good elasticity, can control the expansion and contraction of the water bag by inflating and deflating, has good durability, and the device is fixed with bolts to the steel sheet pile, which is convenient for removal and reuse.
[0023] 4. Wide application scenarios. The utility model can be used during the initial drainage of the steel sheet pile cofferdam and can also be used as an emergency leakage stoppage device during the operation of the steel sheet pile cofferdam. It can closely adhere to the gap to stop leakage without relying on the seepage pressure generated by water seepage and can be installed on both the inside and outside of the steel sheet pile cofferdam. Therefore, it can be applied to the water seepage plugging of the foundation pit supported by steel sheet piles. At the same time, by simply deforming the utility model in terms of length, shape of the support plate, size of the water bag, etc., it can be applied to other types of steel cofferdams such as lock-connected steel pipe pile cofferdams, further enriching the application scenarios. Description of the drawings
[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0025] Figure 1 It is a schematic diagram of the use of a steel sheet pile cofferdam;
[0026] Figure 2 It is a schematic diagram of the grooves on both sides of the steel sheet pile being locked with each other;
[0027] Figure 3Schematic diagram of the device structure of the present utility model;
[0028] Figure 4 Connection schematic diagram of the device of the present utility model from the first perspective;
[0029] Figure 5 Connection schematic diagram of the device of the present utility model from the second perspective;
[0030] Figure 6 Application schematic diagram of the device of the present utility model.
[0031] In the figure: 1, steel sheet pile; 2, bolt; 3, support plate; 301, cutting edge; 302, screw hole; 303, flange; 4, water bag; 401, water filling pipe; 402, valve. Specific embodiments
[0032] It should be noted here that the description of these embodiments is for helping to understand the present utility model, but does not constitute a limitation to the present utility model. The specific structural and functional details disclosed herein are only used to describe the exemplary embodiments of the present utility model. However, the present utility model can be embodied in many alternative forms and should not be construed as being limited to the embodiments set forth herein.
[0033] It should be understood that unless otherwise clearly specified and defined, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection, it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meaning of the above terms in the embodiments can be understood according to specific situations.
[0034] Specific details are provided in the following description to facilitate a complete understanding of the exemplary embodiments. However, those of ordinary skill in the art should understand that the exemplary embodiments can be implemented without these specific details. For example, the system can be shown in a block diagram to avoid making the example unclear with unnecessary details. In other embodiments, well-known processes, structures and technologies can be shown without unnecessary details to avoid making the embodiments unclear.
[0035] Embodiment:
[0036] This embodiment provides a steel sheet pile cofferdam pressure-filling and leak-stopping device, as Figures 3 to 5 shown, including a support plate 3. A water bag 4 is arranged on one side of the support plate 3. The support plate 3 is used to be inserted into the groove of the steel sheet pile to limit the water bag 4 in the groove of the steel sheet pile 1. A flange 303 connected to the groove wall of the steel sheet pile 1 is arranged at the top of the support plate 3.
[0037] During specific implementation, the support plate 3 together with the water bag 4 can be inserted into the groove of the steel sheet pile 1 by a vibrating hammer. The support plate 3 is connected to the groove wall of the steel sheet pile 1 through the flange 303 at the top end of the support plate 3, so that the support plate 3 confines the water bag 4 within the groove of the steel sheet pile 1. Then, water is injected into the water bag 4, and after the water bag 4 expands, it closely adheres to the joint position of the steel sheet pile 1, and the leakage at the joint position of the steel sheet pile 1 is plugged by water pressure.
[0038] Further, the cross-section of the support plate 3 is arc-shaped, V-shaped, W-shaped or box-shaped, or a back rib is provided on the other side of the support plate 3 facing away from the water bag 4. Through such a design, the stiffness of the support plate 3 can be effectively improved, and the deformation of the support plate 3 can be prevented. A cutting edge 301 is provided at the bottom end of the support plate 3. By providing the cutting edge 301 at the bottom end of the support plate 3, it is convenient to insert the bottom of the support plate 3 into the riverbed from the groove of the steel sheet pile 1.
[0039] Further, flanges 303 are provided on both sides of the top end of the support plate 3. During its application, by providing flanges 303 on both sides of the top end of the support plate 3, screw holes 302 matching the bolts 2 are provided on the flanges 303, and the flanges 303 are connected to the groove wall of the steel sheet pile through the bolts 2. By providing screw holes 302 on the flanges 303 on both sides of the top end of the support plate 3, it is convenient to firmly connect the flanges 303 to the groove wall of the steel sheet pile 1 by using the bolts 2.
[0040] Further, the water bag 4 is connected with a water filling pipe 401. One end of the water filling pipe 401 is provided with a thread for connecting an external water pump, and a valve 402 is provided on the water filling pipe 401. During specific implementation, the thread of the water filling pipe 401 can be connected to an external water pump, and water is quickly injected into the water bag 4 through the external water pump. The opening and closing control of water injection and drainage of the water bag 4 can be conveniently realized through the valve 402.
[0041] Further, the water bag 4 is made of rubber material. The water bag 4 made of rubber material has good elasticity and is not easily damaged.
[0042] For easy understanding, a corresponding device application example is provided here, such as Figure 6 As shown, the steel sheet pile cofferdam pressure-filling and leakage-stopping device of this embodiment can be applied in the following manner:
[0043] When the steel sheet pile cofferdam is inserted and the initial drainage is carried out, with the progress of the initial drainage, the water level inside the cofferdam drops, a water head difference is formed between the inside and outside of the cofferdam, and water seeps through the lock joints of the steel sheet pile cofferdam, resulting in the inability of the water level inside the cofferdam to continue to drop. First, determine the location of water seepage at the joints of the steel sheet pile cofferdam, drill bolt holes at the top of the groove wall of the corresponding steel sheet pile 1, and then use a vibratory hammer to insert the support plate 3 together with the water bag 4 into the riverbed foundation layer from the groove of the steel sheet pile 1, and use bolts 2 to fix the flange 303 of the support plate 3 to the groove wall of the steel sheet pile 1. After the fixation of the steel sheet pile 1 and the plugging device is completed, open the valve 402, and use an external water pump to connect to the water filling pipe 401 to fill the water bag 4 with water, so that the water bag 4 expands and closely adheres to the joint position of the steel sheet pile cofferdam to achieve water stoppage and leakage prevention. The water filling pressure is controlled at 1.2 to 1.5 times the corresponding water head pressure at the lowest position of the water bag 4. After the water filling is completed, close the valve 402. Before the steel sheet pile cofferdam is demolished, open the valve 402, and under the action of water pressure, the excess water in the water bag 4 drains out automatically, and the water bag 4 shrinks until the water pressure inside and outside the water bag 4 is balanced. After the water bag 4 drains water, remove the bolts 2 and use a vibratory hammer to pull out the plugging device.
[0044] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A pressure filling and leakage plugging device for a steel sheet pile cofferdam, characterized in that It includes a support plate (3). A water bag (4) is provided on one side of the support plate (3). The support plate (3) is used to be inserted into the groove of the steel sheet pile, and the water bag (4) is limited in the groove of the steel sheet pile (1). A flange (303) connected to the groove wall of the steel sheet pile (1) is provided at the top of the support plate (3).
2. The pressure plugging device for steel sheet pile cofferdam according to claim 1, characterized in that, The cross-section of the support plate (3) is arc-shaped, V-shaped, W-shaped or box-shaped.
3. The pressurized leakage plugging device for a steel sheet pile cofferdam according to claim 2, wherein, A cutting edge (301) is provided at the bottom end of the support plate (3).
4. The pressurized leak plugging device for a steel sheet pile cofferdam according to claim 1, characterized in that, Flanges (303) are provided on both sides at the top of the support plate (3).
5. The pressurized leak plugging device for a steel sheet pile cofferdam according to claim 4, characterized in that, Screw holes (302) matching the bolts (2) are provided on the flanges (303), and the flanges (303) are connected to the groove wall of the steel sheet pile through bolts (2).
6. The pressurized leakage plugging device for a steel sheet pile cofferdam according to claim 1, wherein, The water bag (4) is connected with a water filling pipe (401), and a thread for externally connecting a water pump is provided at one end of the water filling pipe (401).
7. The pressurized leak plugging device for a steel sheet pile cofferdam according to claim 6, characterized in that, A valve (402) is provided on the water filling pipe (401).
8. The pressurized plugging device for a steel sheet pile cofferdam according to claim 1, characterized in that, The water bag (4) is made of rubber material.