Foundation pit dewatering well sealing device

Abstract

The utility model relates to the technical field of constructional engineering, in particular to a foundation pit dewatering well sealing device which comprises a foundation bottom plate and a foundation cushion layer which are arranged on the outer side of the upper end portion of a dewatering well, a steel pipe sleeve arranged on the outer side of the dewatering well in a sleeved mode is embedded in the foundation bottom plate, and a flange ring is welded in the steel pipe sleeve. The flange ring is provided with special-shaped hole grooves which are uniformly distributed and are used for corresponding to screws welded on the flange plate, the flange plate is arranged above the flange ring, and a rubber gasket for water insulation is arranged between the flange ring and the flange plate; after the dewatering well is closed, micro-expansive concrete is poured in the steel pipe sleeve and above the flange ring. According to the foundation pit dewatering well sealing device, the sealing joint is simple, operation is convenient, the dewatering well can be rapidly sealed by rotating and tightening the flange plate, the construction difficulty is reduced, and time, materials and labor cost are saved; and a plurality of waterproof measures are adopted, so that the sealing quality is improved, and more reliable guarantee is provided for construction.

Description

Technical Field

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

[0002] With the development of urbanization, the scale and number of underground projects in my country are constantly expanding. During the construction of underground foundation pits, dewatering operations are required. After the foundation pit construction is completed, the dewatering wells are gradually sealed. Conventional sealing methods require pre-buried casing within the foundation slab, backfilling with sand and gravel after achieving the design anti-floating requirements, and then performing extensive on-site welding and bolt tightening work. This leads to long working times, low efficiency, high costs, and significant safety hazards. Furthermore, it cannot guarantee complete sealing and is prone to water seepage. Utility Model Content

[0003] The technical problem to be solved by the utility model is: in order to overcome the deficiencies in the prior art, a foundation pit dewatering well sealing device is provided.

[0004] The technical solution adopted by the utility model to solve the technical problem is: a foundation pit dewatering well sealing device, comprising a foundation bottom plate and a foundation cushion layer outside the upper end of the dewatering well, wherein a steel pipe sleeve is pre-buried in the foundation bottom plate and is sleeved on the outside of the dewatering well.

[0005] A flange ring is welded inside the steel pipe sleeve. The flange ring is provided with evenly distributed special-shaped holes and slots for corresponding screws welded on the flange plate. The flange plate is arranged above the flange ring.

[0006] A rubber gasket for water isolation is provided between the flange ring and the flange plate.

[0007] Furthermore, after the dewatering well is closed, micro-expansion concrete is poured inside the steel pipe sleeve and above the flange ring.

[0008] Furthermore, a water-stop steel trough is welded to the outside of the steel pipe sleeve, and the water-stop steel trough is located at the connection between the foundation base plate, the foundation cushion layer and the steel pipe sleeve, and the water-stop steel trough is filled with an expansion rubber water-stop strip.

[0009] Furthermore, the foundation cushion layer is located at the lower end of the foundation bottom plate, and the foundation cushion layer is closely connected to the precipitation well.

[0010] The steel pipe sleeve is located on the inner side of the foundation bottom plate and there is a distance between the steel pipe sleeve and the dewatering well.

[0011] Furthermore, a steel plate water stop strip located inside the foundation bottom plate is welded to the outer wall of the steel pipe sleeve.

[0012] Furthermore, a steel bar handle is welded to the upper end of the flange for locking the rotating flange and the flange ring.

[0013] Furthermore, the rubber gasket adopts an annular structure with the same appearance as the flange ring.

[0014] Furthermore, the special-shaped hole groove adopts an integrated shape combining a circle and a rectangle, the diameter of the circle is 21 mm, and the length and width of the rectangle are 20 mm and 12 mm.

[0015] Furthermore, the inner diameter of the steel pipe sleeve is 400 mm, the outer diameter of the flange ring is 400 mm, and the inner diameter is 300 mm.

[0016] The beneficial effects of the utility model are as follows: the foundation pit dewatering well closing device of the utility model has a simple closing node and is easy to operate. By rotating and tightening the flange, the dewatering well can be quickly closed, reducing the construction difficulty and saving time, materials and labor costs; multiple water-isolating measures improve the closing quality and provide more reliable protection for construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a structural diagram of the utility model;

[0019] Figure 2 It is a structural diagram of the screw rod of the utility model;

[0020] Figure 3 This is a schematic structural diagram of the flange ring of the utility model;

[0021] Figure 4 It is a structural diagram of the flange of the utility model.

[0022] Numbers in the figure: 1. Foundation base plate; 2. Foundation cushion; 3. Dewatering well; 4. Steel pipe sleeve; 5. Expansion rubber waterstop; 6. Waterstop steel trough; 7. Flange ring; 8. Flange plate; 9. Steel bar handle; 10. Micro-expansion concrete; 11. Steel plate waterstop; 12. Special-shaped hole groove; 13. Screw; 14. Rubber gasket. DETAILED DESCRIPTION

[0023] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0024] Figures 1-4 The illustrated device for closing a foundation pit dewatering well comprises a foundation bottom plate 1 and a foundation cushion 2 outside the upper end of a dewatering well 3. A steel pipe sleeve 4 is pre-buried in the foundation bottom plate 1 and sleeved outside the dewatering well 3.

[0025] A flange ring 7 is welded inside the steel pipe sleeve 4. The flange ring 7 is provided with evenly distributed special-shaped holes 12 for corresponding screws 13 welded on the flange plate 8. The flange plate 8 is arranged above the flange ring 7.

[0026] A rubber gasket 14 for water isolation is provided between the flange ring 7 and the flange plate 8.

[0027] After the dewatering well 3 is closed, a micro-expansion concrete 10 is poured inside the steel pipe sleeve 4 and above the flange ring 7.

[0028] A water-stop steel trough 6 is welded to the outside of the steel pipe sleeve 4 . The water-stop steel trough 6 is located at the connection between the foundation base plate 1 , the foundation cushion 2 and the steel pipe sleeve 4 . The water-stop steel trough 6 is filled with an expansion rubber water-stop strip 5 .

[0029] The foundation cushion layer 2 is located at the lower end of the foundation bottom plate 1, and the foundation cushion layer 2 is tightly connected to the precipitation well 3.

[0030] The steel pipe sleeve 4 is located on the inner side of the foundation bottom plate 1 and there is a distance between the steel pipe sleeve 4 and the dewatering well 3 .

[0031] A steel plate water stop strip 11 located inside the foundation bottom plate 1 is welded to the outer wall of the steel pipe sleeve 4 .

[0032] A steel bar handle 9 for locking the rotating flange 8 and the flange ring 7 is welded to the upper end of the flange 8.

[0033] The rubber gasket 14 adopts an annular structure with the same appearance as the flange ring 7 .

[0034] The special-shaped hole 12 is an integrated shape of a circle and a rectangle, the diameter of the circle is 21 mm, the length of the rectangle is 20 mm, and the width is 12 mm.

[0035] The inner diameter of the steel pipe sleeve 4 is 400 mm, and the outer diameter of the flange ring 7 is 400 mm and the inner diameter is 300 mm.

[0036] A flange ring 7 is welded inside the steel pipe sleeve 4 and pre-buried in the foundation base plate 1. A special-shaped slot 12 is opened in the flange ring 7. An M10 screw 13 is welded on the flange plate 8. When the dewatering well is closed later, the flange plate 8 is rotated counterclockwise to tighten the flange ring 7 inside the steel pipe sleeve 4.

[0037] A rubber gasket 14 is provided between the flange ring 7 and the flange 8, and a steel bar handle 9 is welded on the flange 8 to facilitate the rotation of the flange 8 when closing;

[0038] A water-stop steel groove 6 is provided between the embedded steel pipe sleeve 4 and the foundation bottom plate 1 , and the interior is filled with an expansion rubber water-stop strip 5 to prevent water in the precipitation well from seeping into the foundation bottom plate 1 .

[0039] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A foundation pit dewatering well sealing device, comprising a foundation bottom plate (1) and a foundation cushion layer (2) outside the upper end of the dewatering well (3), characterized in that: A steel pipe sleeve (4) is pre-buried in the foundation bottom plate (1) and is sleeved on the outside of the dewatering well (3). A flange ring (7) is welded inside the steel pipe sleeve (4). The flange ring (7) is provided with evenly distributed special-shaped holes (12) for corresponding screws (13) welded on the flange plate (8). The flange plate (8) is arranged above the flange ring (7). A rubber gasket (14) for water isolation is provided between the flange ring (7) and the flange plate (8).

2. The foundation pit dewatering well sealing device according to claim 1, characterized in that: After the dewatering well (3) is closed, micro-expansion concrete (10) is poured inside the steel pipe sleeve (4) and above the flange ring (7).

3. The foundation pit dewatering well sealing device according to claim 1, characterized in that: The steel pipe sleeve (4) is welded with a water-stop steel groove (6) on the outside. The water-stop steel groove (6) is located at the connection between the foundation base plate (1), the foundation cushion layer (2) and the steel pipe sleeve (4). The water-stop steel groove (6) is filled with an expansion rubber water-stop strip (5).

4. The foundation pit dewatering well sealing device according to claim 1, characterized in that: The foundation cushion layer (2) is located at the lower end of the foundation bottom plate (1), and the foundation cushion layer (2) is tightly connected to the precipitation well (3). The steel pipe sleeve (4) is located on the inner side of the foundation bottom plate (1), and there is a distance between the steel pipe sleeve (4) and the dewatering well (3).

5. The foundation pit dewatering well sealing device according to claim 1, characterized in that: A steel plate water stop strip (11) located inside the foundation bottom plate (1) is welded to the outer wall of the steel pipe sleeve (4).

6. The foundation pit dewatering well sealing device according to claim 1, characterized in that: A steel bar handle (9) for locking the rotating flange (8) and the flange ring (7) is welded to the upper end of the flange (8).

7. The foundation pit dewatering well sealing device according to claim 1, characterized in that: The rubber gasket (14) adopts an annular structure with the same appearance as the flange ring (7).

8. The foundation pit dewatering well sealing device according to claim 1, characterized in that: The special-shaped hole groove (12) adopts an integrated shape combining a circle and a rectangle, the diameter of the circle is 21 mm, the length of the rectangle is 20 mm, and the width is 12 mm.

9. The foundation pit dewatering well sealing device according to claim 1, characterized in that: The inner diameter of the steel pipe sleeve (4) is 400 mm, and the outer diameter of the flange ring (7) is 400 mm and the inner diameter is 300 mm.

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