Plugging structure between steel hanging box cofferdam bottom plate and steel pile casing

Abstract

The utility model discloses a plugging structure between a steel hanging box cofferdam bottom plate and a steel casing, which comprises a support frame, a steel hanging box cofferdam bottom plate and a steel casing, the annular water tank is arranged on the supporting frame, and the annular water tank is arranged on the steel casing in a sleeving mode; the annular water stop buckle strip is arranged on a bottom plate of the steel hanging box cofferdam; the annular water tank and the annular water stop buckle strip are oppositely arranged. Through the synergistic effect of the annular water tank and the annular water stop buckle strip, automatic plugging between the steel hanging box cofferdam bottom plate and the steel pile casing is achieved.

Description

Technical Field

[0001] The utility model relates to the field of deep-water bridge engineering construction, in particular to a blocking structure between a bottom plate of a steel hanging box cofferdam and a steel casing. Background Art

[0002] The demand for building bridges across large rivers, reservoirs and oceans is increasing. Bridge foundation construction under deep-water conditions is one of the key difficulties in bridge construction.

[0003] The steel box cofferdam is a large temporary structure commonly used in deep-water construction of high-pile bridge caps. It uses steel casing as support and surrounds water through side plates, bottom plates and bottom concrete to ensure that the cap is constructed in a waterless environment. The steel box cofferdam is a bottom structure. To ensure that it is smoothly lowered along the steel casing, holes slightly larger than the steel casing need to be reserved in the bottom plate of the steel box cofferdam. When the steel box cofferdam is lowered to the design elevation, the bottom concrete needs to be poured. Due to the holes between the bottom plate of the steel box cofferdam and the steel casing, concrete leakage and water gushing will occur during the pouring process, greatly affecting the quality of the poured concrete.

[0004] In order to ensure the smooth pouring of the bottom seal concrete, divers often use sandbags or steel plates to seal the gap between the bottom plate of the steel box cofferdam and the steel casing underwater. This treatment method requires manual underwater operations, which is complicated, costly, and has a high construction risk. Alternatively, airbags can be introduced to drain the water in the gap and complete the sealing by inflating the airbags, but the airbags are prone to floating, resulting in sudden water seepage during the operation, and the airbags are easily damaged. Utility Model Content

[0005] The purpose of the utility model is to address the defects of the prior art and provide a sealing structure between the bottom plate of a steel box cofferdam and a steel casing. The gap between the bottom plate of a steel box cofferdam and the steel casing is sealed by introducing an annular water tank and an annular water stop buckle strip.

[0006] The utility model provides a sealing structure between the bottom plate of a steel hanging box cofferdam and a steel casing, comprising: a support frame, the support frame is arranged on the side wall of the steel casing; an annular water tank, the annular water tank is arranged on the support frame, and the annular water tank is sleeved on the steel casing; an annular water stop buckle strip, the annular water stop buckle strip is arranged on the bottom plate of the steel hanging box cofferdam; wherein the annular water tank and the annular water stop buckle strip are arranged opposite to each other.

[0007] Further, the support frame includes a support rib and a support plate, one end of the support rib is fixedly connected to the side wall of the steel casing, the other end of the support rib is fixedly connected to the bottom of the support plate, and one end of the support plate is fixedly connected to the side wall of the steel casing. Further, the support plate is arranged horizontally.

[0008] Furthermore, the annular water tank is made of polyethylene.

[0009] Furthermore, the elevation of the top of the support frame = the elevation of the bottom of the steel hanging box cofferdam - the height of the annular water tank + a preset value.

[0010] Furthermore, the inner diameter of the annular water tank is larger than the outer diameter of the steel casing.

[0011] Furthermore, the annular waterstop strip is a PN water-swellable waterstop strip.

[0012] Furthermore, the support frame is fixed to the steel casing by welding.

[0013] Furthermore, the annular water stop buckle strip is bonded and fixed to the bottom plate of the steel hanging box cofferdam.

[0014] Furthermore, there is a hole in the middle of the bottom plate of the steel box cofferdam, and the steel casing is inserted into the hole on the bottom plate of the steel box cofferdam.

[0015] The beneficial effects of the utility model are:

[0016] 1. It is only necessary to simply install the sealing device before lowering the steel box cofferdam. After the steel box cofferdam is lowered to the designed elevation, the gaps will be automatically sealed, avoiding divers' underwater operations, simplifying the construction process, and reducing costs and construction risks.

[0017] 2. Compared with airbags, the coordination of the annular water tank and the annular water stop strip makes the probability of damage relatively smaller, and it will not easily shift and cause water seepage under the action of buoyancy like airbags. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic elevation view of the arrangement of the blocking device between the steel hanging box cofferdam and the steel casing before use in the embodiment of the utility model.

[0019] Figure 2 It is a plan view schematic diagram of the arrangement of the blocking device between the steel hanging box cofferdam and the steel casing in the embodiment of the utility model.

[0020] Figure 3 It is a schematic elevation view of the arrangement of the blocking device between the steel hanging box cofferdam and the steel casing when used in the embodiment of the utility model.

[0021] Figure numerals: 1-support frame; 11-support rib; 12-support plate; 2-annular water tank; 3-annular water stop strip; 4-steel hanging box cofferdam; 5-steel casing. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0023] Example 1

[0024] refer to Figure 1-3 , a plugging structure between the bottom plate of a steel hanging box cofferdam and a steel casing, comprising:

[0025] The steel box cofferdam 4 and the steel casing 5 are provided with a hole in the middle of the bottom plate of the steel box cofferdam 4 , and the steel casing 5 is penetrated through the hole on the bottom plate of the steel box cofferdam 4 .

[0026] A support frame 1 is arranged on the side wall of the steel casing 5, and the support frame 1 includes a support rib 11 and a support plate 12. One end of the support rib 11 is fixedly connected to the side wall of the steel casing 5, and the other end of the support rib 11 is fixedly connected to the bottom of the support plate 12. One end of the support plate 12 is fixedly connected to the side wall of the steel casing 5. The support plate 12 is horizontally arranged, and the support frame 1 is welded and fixed to the steel casing 5.

[0027] The annular water tank 2 is arranged on the support frame 1, and the annular water tank 2 is sleeved on the steel casing 5. The annular water tank 2 is made of polyethylene. The inner diameter of the annular water tank 2 is about 5 cm larger than the outer diameter of the steel casing 5, which is convenient for installation.

[0028] An annular water-stop buckle strip 3 is provided on the bottom plate of the steel box cofferdam 4 . The annular water-stop buckle strip 3 is a PN water-swellable water-stop buckle strip. The annular water-stop buckle strip 3 is bonded and fixed to the bottom plate of the steel box cofferdam 4 .

[0029] The annular water tank 2 is arranged opposite to the annular water stop strip 3. The top elevation of the support frame 1 = the bottom elevation of the steel hanging box cofferdam 4 - the height of the annular water tank 2 + a preset value, which is determined according to the actual situation to eliminate the elevation deviation.

[0030] The installation method is as follows:

[0031] 1. Before the steel casing 5 enters the water, the lower end of the support rib 11 is welded and fixed to the steel casing 5, and the upper end of the support rib 11 is welded and fixed to the support plate 12 to form a support frame 1.

[0032] 2. When processing the steel hanging box cofferdam 4, an annular water stop buckle strip 3 is welded and installed around the holes of the bottom plate.

[0033] 3. Fill the annular water tank 2 with water and seal it, and then sink it along the steel casing 5 onto the support frame 1.

[0034] 4. Transport the steel box cofferdam 4 to the bridge pier and install and fix it on the steel casing 5.

[0035] 5. Lower the steel box cofferdam 4 to the designed elevation. At this time, the bottom plate of the steel box cofferdam 4 is in close contact with the annular water tank 2, so that the raised annular water-stop strip 3 on the bottom plate of the steel box cofferdam 4 is in close contact with the top wall of the annular water tank 2. Under the action of water, the annular water-stop strip 3 expands and fills the gap at the fitting point, thereby automatically sealing the gap between the bottom plate of the steel box cofferdam 4 and the steel casing 5.

[0036] 6. Pour the filling concrete in the gap between the bottom plate keel of the steel hanging box cofferdam 4 and the steel casing 5. After the concrete solidifies, start pouring the bottom concrete of the steel hanging box cofferdam 4.

[0037] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A plugging structure between the bottom plate of a steel hanging box cofferdam and a steel casing, characterized in that: include: A support frame (1), wherein the support frame (1) is arranged on a side wall of the steel casing (5); An annular water tank (2), the annular water tank (2) being arranged on the support frame (1), and the annular water tank (2) being sleeved on the steel casing (5); An annular water-stopping strip (3), wherein the annular water-stopping strip (3) is arranged on the bottom plate of the steel hanging box cofferdam (4); Wherein, the annular water tank (2) and the annular water stop strip (3) are arranged opposite to each other.

2. The plugging structure between the bottom plate of the steel hanging box cofferdam and the steel casing according to claim 1 is characterized by: The support frame (1) comprises a support rib (11) and a support plate (12), one end of the support rib (11) is fixedly connected to the side wall of the steel casing (5), the other end of the support rib (11) is fixedly connected to the bottom of the support plate (12), and one end of the support plate (12) is fixedly connected to the side wall of the steel casing (5).

3. The plugging structure between the bottom plate of the steel hanging box cofferdam and the steel casing according to claim 2 is characterized by: The support plate (12) is arranged horizontally.

4. The plugging structure between the bottom plate of the steel hanging box cofferdam and the steel casing according to claim 1 is characterized by: The annular water tank (2) is made of polyethylene.

5. The plugging structure between the bottom plate of the steel hanging box cofferdam and the steel casing according to claim 1 is characterized by: The top elevation of the support frame (1) = the bottom elevation of the steel hanging box cofferdam (4) - the height of the annular water tank (2) + a preset value.

6. The sealing structure between the bottom plate of the steel hanging box cofferdam and the steel casing according to claim 1 is characterized by: The inner diameter of the annular water tank (2) is larger than the outer diameter of the steel casing (5).

7. The plugging structure between the bottom plate of the steel hanging box cofferdam and the steel casing according to claim 1 is characterized by: The annular water stop buckle strip (3) is a PN water-swellable water stop strip.

8. The plugging structure between the bottom plate of the steel hanging box cofferdam and the steel casing according to claim 1 is characterized by: The support frame (1) is fixed to the steel casing (5) by welding.

9. The plugging structure between the bottom plate of the steel hanging box cofferdam and the steel casing according to claim 1 is characterized by: The annular water stop buckle strip (3) is bonded and fixed to the bottom plate of the steel hanging box cofferdam (4).

10. The sealing structure between the bottom plate of the steel hanging box cofferdam and the steel casing according to claim 1 is characterized by: The bottom plate of the steel box cofferdam (4) is provided with a hole in the middle, and the steel casing (5) is inserted into the hole on the bottom plate of the steel box cofferdam (4).

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