Rapid plugging device suitable for steel hanging box cofferdam

Abstract

The utility model belongs to the technical field of deepwater bridge foundation bearing platform construction, and particularly relates to a quick plugging device suitable for a steel hanging box cofferdam, which comprises an annular cylinder plate, a first annular wall and a second annular wall are respectively arranged at two axial ends of the annular cylinder plate, and the outer diameter of the first annular wall is larger than that of the second annular wall; the first sealing plate is coaxially connected to the first annular wall, the second sealing plate is coaxially connected to the second annular wall, and a pouring channel with the inner diameter gradually reduced is formed in the first sealing plate, the annular cylinder plate and the second sealing plate in the direction from the first sealing plate to the second sealing plate; the pile casing is arranged in the pouring channel in a penetrating mode, a gap used for filling a sand bag is reserved between the outer periphery of the pile casing and the inner periphery of the second sealing plate, and gaps used for pouring bottom sealing concrete are reserved between the outer periphery of the pile casing and the inner periphery of the annular cylinder plate and between the outer periphery of the pile casing and the inner periphery of the first sealing plate. According to the utility model, safe plugging and rapid construction are realized in the cofferdam construction process, and the construction efficiency and safety of the deepwater bridge foundation bearing platform are obviously improved.

Description

Technical Field

[0001] This utility model belongs to the field of deep-water bridge foundation construction technology, and in particular relates to a rapid sealing device suitable for steel cofferdams. Background Technology

[0002] As a commonly used retaining structure for the construction of deep-water bridge foundations, the steel caisson cofferdam is a bottomed structure that is sunk to the design elevation and then suspended in the water. The bottom is then sealed with underwater sealing concrete, and the cofferdam is formed after drainage.

[0003] However, in conventional steel cofferdam sealing construction, the underwater single-stage bottom sealing concrete sealing method is often used, which can easily lead to water seepage, resulting in problems such as reduced project quality and delayed construction period. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model provides a rapid sealing device suitable for steel cofferdams, which can reduce the risk of downward water seepage, improve project quality, and greatly alleviate the problem of construction delays.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This utility model provides a rapid sealing device suitable for steel cofferdams, comprising: an annular cylindrical plate, with a first annular wall and a second annular wall respectively provided at its two axial ends, the outer diameter of the first annular wall being larger than the outer diameter of the second annular wall; a first sealing plate and a second sealing plate, the first sealing plate being coaxially connected to the first annular wall and the second sealing plate being coaxially connected to the second annular wall, and a pouring channel with a gradually decreasing inner diameter being formed inside the first sealing plate, the annular cylindrical plate, and the second sealing plate along the direction from the first sealing plate to the second sealing plate; and a protective casing, the protective casing being inserted into the pouring channel, a gap for filling sandbags being left between the outer circumference of the protective casing and the inner circumference of the second sealing plate, and a gap for pouring bottom sealing concrete being left between the outer circumference of the protective casing and the inner circumference of the annular cylindrical plate and the inner circumference of the first sealing plate.

[0007] Preferably, it also includes a keel, which is connected to the side of the first sealing plate away from the annular cylindrical plate, and a gap is left between the keel and the protective casing for filling sandbags and sealing concrete.

[0008] Preferably, it also includes a plurality of shear plates, which are connected between the keel and the casing.

[0009] Preferably, the plurality of shear-resistant plates are arranged in a circular array around the center of any cross-section of the annular cylindrical plate.

[0010] Preferably, a hoisting device is further included for hoisting the annular cylinder plate to be spaced apart from the outer periphery of the jacket.

[0011] Preferably, the jacket is a steel jacket.

[0012] Preferably, the outer diameter of the cylinder wall of the annular cylinder plate gradually decreases in the direction from the first sealing plate to the second sealing plate.

[0013] The utility model discloses the beneficial effect is: the utility model discloses in the process of plugging, first through the sandbag filling mode, fill sandbag between the second sealing plate and the gap of jacket, then through the bottom sealing concrete pouring mode and seal the gap between the first sealing plate, annular cylinder plate and jacket, after the steel hanging box is put in position, carries out two times of plugging, and the first sandbag plugging improves the quality of second bottom sealing concrete construction, and the first sealing plate is coaxially connected to the first annular wall, and the second sealing plate is coaxially connected to the second annular wall, and along the direction from the first sealing plate to the second sealing plate, the first sealing plate, annular cylinder plate and the second sealing plate form the pouring channel of gradually reducing internal diameter, thus under the condition that the outer diameter of the jacket is unchangeable, the gap between the second sealing plate and the jacket is the minimum gap of pouring channel, reduces the probability of water seepage, also reduces the possibility of underwater leak repair, improves construction efficiency, and realizes the safety and stability of plugging device in the cofferdam pumping system conversion process, greatly improves construction efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 A front view of a quick plugging device suitable for a steel hanging box cofferdam is provided for the utility model.

[0015] Marked in the drawing: 1, annular cylinder plate;2, first sealing plate;3, second sealing plate;4, jacket;5, sandbag;6, bottom sealing concrete;7, keel;8, shear plate.

[0016] The utility model will be described in detail below with reference to the embodiment of the utility model. DETAILED DESCRIPTION

[0017] In the description of the utility model, it is necessary to explain that, unless there is explicit provision and limitation, the terms "installation", "connection", "connection" should be broad sense, for example, can be fixed connection, can be detachable connection, or integrally connected;Can be mechanical connection, can be electrical connection;Can be directly connected, can be indirectly connected through the intermediate medium, can be the communication of two components inside. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood through specific circumstances.

[0018] In order to make the purpose, technical scheme and advantages of the utility model more clear, the utility model will be described further in detail below in combination with the drawings. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0019] The utility model will be described further in combination with the drawings and embodiments.

[0020] As Figure 1 The application provides a kind of to be applicable to the quick plugging device of steel hanging box cofferdam, including: annular cylinder plate 1, its axial two ends are equipped with first annular wall and second annular wall respectively, the first annular wall outer diameter is greater than the second annular wall outer diameter;First sealing plate 2 and second sealing plate 3, the first sealing plate 2 is coaxially connected in the first annular wall, the second sealing plate 3 is coaxially connected in the second annular wall, along the direction of the first sealing plate 2 towards the second sealing plate 3, the first sealing plate 2, the annular cylinder plate 1 and the second sealing plate 3 inside form gradually reducing inner diameter pouring channel;And casing 4, the casing 4 is worn in the pouring channel, the clearance for filling sand bag 5 is left between the outer periphery of the casing 4 and the inner periphery of the second sealing plate 3, the clearance for pouring bottom concrete 6 is left between the outer periphery of the casing 4 and the inner periphery of the annular cylinder plate 1 and the inner periphery of the first sealing plate 2.

[0021] The application has the beneficial effects that: in the process of plugging, first, the sand bag 5 is filled in the clearance between the second sealing plate 3 and the casing 4 by filling the sand bag 5, and then the clearance between the first sealing plate 2, the annular cylinder plate 1 and the casing 4 is plugged by pouring the bottom concrete 6, after the steel hanging box is lowered into place, two plugging operations are performed, the first sand bag 5 plugging improves the quality of the second bottom concrete 6 construction, and the first sealing plate 2 is coaxially connected to the first annular wall, the second sealing plate 3 is coaxially connected to the second annular wall, and along the direction of the first sealing plate 2 towards the second sealing plate 3, the first sealing plate 2, the annular cylinder plate 1 and the second sealing plate 3 inside form gradually reducing inner diameter pouring channel, so that in the case of unchanged casing 4 outer diameter, the clearance between the second sealing plate 3 and the casing 4 is the minimum clearance of the pouring channel, which reduces the possibility of underwater leakage, reduces the material consumption, improves the construction efficiency, and realizes the safety and stability of the plugging device during the conversion of the cofferdam pumping system, greatly improving the construction efficiency.

[0022] Further, the quick sealing device further comprises a keel 7 connected to the first sealing plate 2 on the side away from the annular cylinder plate 1, and a gap is left between the keel 7 and the casing 4 for filling the sand bag 5 and the bottom sealing concrete 6. The keel 7 is annular, and the tangent plane of the curved surface of the keel 7 is perpendicular to the extension direction of the first sealing plate 2. The cross section of the keel 7 is H-shaped, which is used to strengthen the structural strength and install the shear-resistant plate.

[0023] Specifically, the quick sealing device further comprises a plurality of shear-resistant plates 8 connected between the keel 7 and the casing 4. More specifically, the plurality of shear-resistant plates 8 are distributed in a circumferential array around the center of any tangent plane of the annular cylinder plate 1. After pouring, the casing 4 and the keel 7 are connected through the shear-resistant plates 8, which can improve the shear resistance and increase the structural strength.

[0024] In addition, the quick sealing device further comprises a hoisting device for hoisting the annular cylinder plate 1 so as to be spaced apart from the outer periphery of the casing 4. The hoisting device can be a crane, and the crane hoisting integrated structure is spaced apart and sleeved on the outer periphery of the casing 4 in the axial direction of the casing 4. After stopping at the specified position, the secondary pouring is started, and the integrated structure and the casing 4 are fixedly connected through the shear-resistant plates 8.

[0025] In this embodiment, the casing 4 is a steel casing 4, which is convenient for welding and can improve the structural strength.

[0026] In this embodiment, the outer diameter of the cylinder wall of the annular cylinder plate 1 gradually decreases in the direction of the first sealing plate 2 towards the second sealing plate 3, thereby reducing the material consumption.

[0027] It should be noted that the integrated structure, the keel, the shear-resistant plate and the casing in the embodiments of the present application are all welded in a necklace manner, thereby strengthening the overall structural strength.

[0028] The application provides a quick plugging device suitable for a steel hanging box cofferdam. First, an annular cylinder plate 1 for the cofferdam is welded to a first ring wall and a second ring wall respectively to a first sealing plate 2 and a second sealing plate 3 to form an integrated structure, and a pouring channel with a gradually decreasing inner diameter from top to bottom is formed. Then, the first sealing plate 2 of the integrated structure is welded below a keel 7. After the steel hanging box is lowered into position, sand bags 5 are first poured into a pouring channel in the form of an inverted cone formed by the annular cylinder plate 1, the second sealing plate 3 and the first sealing plate 2 to block the annular bottom. Finally, bottom pouring concrete 6 is poured, and a space for a shear plate 8 is reserved during the pouring process to achieve secondary dense plugging. The plugging effect is checked. If there is water seepage, water leakage is immediately repaired with quick-setting cement. After the bottom pouring concrete 6 reaches the strength, the shear plate 8 is welded to a sheathing cylinder 4 under the action of water pumping to achieve initial non-dense plugging. The keel 7 is welded below the shear plate 8 to ensure the stability of the plugging device under the action of buoyancy jacking. The application greatly improves the construction efficiency and safety.

[0029] The above detailed description of the examples of the application, but the content is only a preferred embodiment of the application, can not be considered as limiting the scope of the application. Any equivalent changes and improvements within the scope of the application should still belong to the patent coverage of the application.

Claims

1. A quick plugging device suitable for a steel hanging box cofferdam, characterized in that, The utility model relates to a steel casing for a caisson, comprising: a ring-shaped barrel plate, which is provided with a first ring-shaped wall and a second ring-shaped wall at its axial two ends respectively, the outer diameter of the first ring-shaped wall is larger than that of the second ring-shaped wall; a first sealing plate and a second sealing plate, the first sealing plate is coaxially connected to the first ring-shaped wall, the second sealing plate is coaxially connected to the second ring-shaped wall, and an internal pouring channel with gradually decreasing inner diameter is formed along the direction from the first sealing plate to the second sealing plate; and a steel casing, which is arranged in the pouring channel, a gap for filling sand bags is left between the outer periphery of the steel casing and the inner periphery of the second sealing plate, and a gap for pouring bottom sealing concrete is left between the outer periphery of the steel casing and the inner periphery of the first sealing plate and the inner periphery of the ring-shaped barrel plate.

2. A quick plugging device suitable for a steel hanging box cofferdam according to claim 1, characterized in that, A keel is further included, which is connected to the side of the first sealing plate away from the ring-shaped barrel plate, and a gap for filling sand bags and bottom sealing concrete is left between the keel and the steel casing.

3. A quick plugging device suitable for a steel hanging box cofferdam according to claim 2, characterized in that, A plurality of shear plates are further included, which are connected between the keel and the steel casing.

4. A quick plugging device suitable for a steel hanging box cofferdam according to claim 3, characterized in that, The plurality of shear plates are distributed in a circumferential array around the center of any cross-sectional circle of the ring-shaped barrel plate.

5. A quick plugging device suitable for steel hanging box cofferdam according to claim 1, characterized in that, A hoisting device is further included, which is used for hoisting the ring-shaped barrel plate and spacing the ring-shaped barrel plate from the outer periphery of the steel casing.

6. A quick plugging device suitable for a steel hanging box cofferdam according to claim 1, characterized in that, The steel casing is a steel casing.

7. A quick plugging device suitable for steel hanging box cofferdam according to claim 1, characterized in that, The outer diameter of the barrel wall of the ring-shaped barrel plate gradually decreases along the direction from the first sealing plate to the second sealing plate.

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