Foundation pit dewatering well sealing device

Abstract

The utility model relates to the technical field of foundation pit construction equipment, and particularly discloses a foundation pit dewatering well sealing device which comprises a cover plate, a water stop steel plate, a steel sleeve and a connecting bolt. The upper end of the steel sleeve is connected to the lower end of the water stop steel plate along the inner wall of the concrete foundation; the water stop steel plate is annular and is arranged in the middle of the concrete foundation; the cover plate is arranged above the water stop steel plate and connected to the water stop steel plate through the connecting bolts. According to the device, the steel sleeve is arranged to adapt to a precipitation well mouth, the water stop steel plate is arranged at the top of the steel sleeve to be matched with the cover plate for sealing, the problem of water seepage is solved, and potential safety hazards are eradicated.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation pit construction equipment, in particular to a foundation pit dewatering well closing device. Background Art

[0002] In the construction of deep foundation pits for municipal engineering rainwater pumping stations, subway stations, underpasses and other projects, pipe wells are required for dewatering. After the main structure construction is completed and the foundation pit is backfilled, the dewatering wells need to be closed. The conventional method of closing dewatering wells is to pour and seal them with concrete. During the sealing process, the concrete will form water holes due to the influence of water pressure during the process of increasing strength, resulting in water leakage at the dewatering well location.

[0003] The Chinese patent "A method for closing a drainage well with a pre-embedded circular ring" with application number 201710283388.4 discloses a scheme in which the outer wall of the drainage well is composed of a foundation base plate, a waterproofing coil, a base cushion layer, and a base original soil from top to bottom. The blind plate is fully welded to the groove of the pre-embedded circular ring. The pre-embedded circular ring is welded and fixed on the sandless concrete pipe. Concrete is poured on the upper part of the blind plate. A switch valve for draining the drainage well during and after closure is provided in the middle of the blind plate. The switch valve on the blind plate is in a closed state. The blind plate is located in the foundation base plate layer. However, in actual construction, due to the high groundwater pressure, the drainage well keeps leaking water upwards during the closure process, and the welding with water cannot be welded tightly. During the welding process, water will decompose into hydrogen and oxygen, directly forming hydrogen pores and oxides, affecting the quality and strength of the weld and causing poor fusion; and welding with water is prone to electric shock accidents, causing personal injury, etc.

[0004] In order to solve the above problems, a foundation pit dewatering well closing device is proposed. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a foundation pit dewatering well sealing device to solve the problems of water seepage and poor welding quality due to water welding during the foundation pit dewatering well sealing construction, which poses a potential safety hazard.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is: a foundation pit dewatering well closing device, including a cover plate, a water stop steel plate, a steel casing and connecting bolts;

[0007] A steel casing, the lower end of which is connected to the drainage wellhead, and the upper end of which is arranged along the inner wall of the concrete foundation and connected to the lower end of the water-stop steel plate;

[0008] The water-stop steel plate is annular and is set in the middle of the concrete foundation;

[0009] The cover plate is arranged above the water-stop steel plate and is connected to the water-stop steel plate through connecting bolts.

[0010] As a further technical solution of the above solution, it also includes a rubber pad, which is arranged between the steel casing and the dewatering wellhead for sealing.

[0011] As a further technical solution of the above solution, it also includes reinforcing steel bars, which are arranged at the lower part of the steel casing and connected to the concrete foundation for stabilization.

[0012] Compared with the prior art, the utility model has the following advantages and beneficial effects: the device is adapted to the dewatering wellhead by arranging a steel casing, and a water-stop steel plate and a cover plate are arranged on the top of the steel casing for sealing, thereby solving the problem of water seepage and eliminating safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a front structural schematic diagram of the utility model.

[0014] Figure 2 It is a schematic diagram of the top structure of the utility model.

[0015] The meanings of the numbers in the figure are: cover plate-1; water stop steel plate-2; steel casing-3; connecting bolts-4; dewatering wellhead-5; concrete foundation-6; rubber pad-7; reinforcement steel bar-8. DETAILED DESCRIPTION

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the accompanying drawings in the embodiments of the utility model, so as to have a further understanding of the concept of the utility model, the technical problems solved, the technical features constituting the technical solutions and the technical effects brought about.

[0017] like Figure 1~Figure 2 As shown, the utility model is a foundation pit dewatering well closing device, comprising a cover plate 1, a water stop steel plate 2, a steel casing 3 and a connecting bolt 4;

[0018] The steel casing 3 has its lower end connected to the drainage wellhead 5 and its upper end arranged along the inner wall of the concrete foundation 6 and connected to the lower end of the water-stop steel plate 2;

[0019] The water-stop steel plate 2 is annular and is arranged in the middle of the concrete foundation 6;

[0020] The cover plate 1 is arranged above the water-stop steel plate 2 and is connected to the water-stop steel plate 2 via connecting bolts 4 .

[0021] When using this device, firstly, the steel casing 3 is processed according to the size of the precipitation wellhead 5, and then the water-stop steel plate 2 and the reinforcing steel bar 8 are welded to the top plate of the steel casing. Before pouring the concrete foundation 6, the welded steel casing device is installed in place, and the rubber pad 7 is installed simultaneously to form a closed structure. Then, the pouring construction of the concrete foundation 6 is completed. After the concrete structure is fully constructed, the precipitation well is closed. By installing the cover plate 1 in place and setting a rubber water-stop pad at the bottom of the cover plate, and then tightening the connecting bolts 4, the precipitation well is closed, which effectively improves the closed water-stopping effect of the precipitation well and eliminates safety and quality hazards.

[0022] like Figure 1 As shown, as a preferred embodiment, it also includes a rubber pad 7, which is arranged between the steel casing 3 and the drainage wellhead 5 for sealing. In this embodiment, the rubber pad 7 is arranged, and is sealed by a sealant when in use to ensure the sealing of the connection and avoid water seepage.

[0023] like Figure 1 As shown, as a preferred embodiment, it also includes reinforcing steel bars 8, which are arranged at the lower part of the steel casing 3 and connected to the concrete foundation 6 for stabilization. In this embodiment, reinforcing steel bars 8 are arranged on the circumference of the steel casing 3, and the reinforcing steel bars 8 are used to connect the concrete foundation 6 for stabilization, which further improves the stability of the device.

[0024] The words “connection” and “fixation” appearing in the description of the present invention may refer to fixed connection, processing and forming, welding, or mechanical connection. The specific meanings of the above terms in the present invention shall be understood according to the specific circumstances.

[0025] In the description of the present invention, the terms "center", "upper", "lower", "horizontal", "inner", "outer", etc., which indicate the orientation or position relationship, are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying a specific orientation that the device or element referred to must have, and therefore cannot be understood as a limitation on the present invention.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A foundation pit dewatering well closing device, characterized in that: It comprises a cover plate (1), a water stop steel plate (2), a steel casing (3) and connecting bolts (4); A steel casing (3), the lower end of which is connected to the drainage wellhead (5), and the upper end of which is arranged along the inner wall of the concrete foundation (6) and connected to the lower end of the water-stopping steel plate (2); A water-stop steel plate (2) is annular and is arranged in the middle of the concrete foundation (6); A cover plate (1) is arranged above the water-stop steel plate (2) and is connected to the water-stop steel plate (2) via connecting bolts (4); It also includes a rubber pad (7), which is arranged between the steel casing (3) and the drainage wellhead (5) and is used for sealing; It also includes reinforcing steel bars (8), which are arranged at the lower part of the steel casing (3) and connected to the concrete foundation (6) for stabilization.

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