Waterproof structure for foundation pit construction

Abstract

The utility model discloses a waterproof structure for foundation pit construction, which comprises a water collecting tank, a rigid compacting agent layer is coated on the inner side wall of the water collecting tank, filling soil is arranged in the water collecting tank, and a cover plate is arranged at the top of the water collecting tank; the water accumulation tank is of a cylindrical structure, and the top of the water accumulation tank horizontally extends towards the outer side to form a tank body outer edge; a sealing gasket is arranged between the outer edge of the tank body and the cover plate; the upper side of the cover plate is covered with a waterproof roll, and the waterproof roll at least covers the outer edge of the tank body and the cover plate; a waterproof layer is arranged on the upper side of the waterproof roll, and a sand grain layer is arranged on the upper side of the waterproof layer; and a concrete waterproof compacting agent is doped in the waterproof layer and the sand grain layer. The waterproof structure for foundation pit construction is reasonable in structure and convenient to construct, backflow of underground water of a foundation pit is avoided through combined sealing of the waterproof coiled material, the waterproof layer and the sand grain layer, and the waterproof performance of the bottom of the foundation pit is effectively guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of building engineering and relates to a waterproof structure for foundation pit construction. Background Art

[0002] In foundation pit projects in water-rich strata, the groundwater is often shallow and abundant. Once leakage occurs in the waterproofing system of the foundation pit, it will seriously affect the stability of the foundation pit and the safety of surrounding buildings.

[0003] Usually, after the foundation pit is excavated, a water pump is used to extract the water collected at the bottom of the foundation pit, and then the bottom of the foundation pit is waterproofed. Specifically, a water collection device needs to be placed at the bottom of the foundation pit, and then a water pump is set in the water collection device to perform water pumping operations. However, in the waterproofing of the bottom of the foundation pit, it is easy to ignore the sealing of the water collection device, which in turn affects the overall construction quality of the foundation pit project.

[0004] Therefore, it is urgent to design a waterproof structure for foundation pit construction to solve the technical problems existing in the prior art. Utility Model Content

[0005] The purpose of the utility model is to solve some of the technical problems existing in the prior art to at least a certain extent, and to provide a waterproof structure for foundation pit construction, which has a reasonable structure and is convenient to construct. Through the combined sealing of the waterproof membrane, the waterproof layer and the sand layer, the backflow of groundwater in the foundation pit is avoided, and the waterproofness of the bottom of the foundation pit is effectively guaranteed.

[0006] In order to solve the above technical problems, the utility model provides a waterproof structure for foundation pit construction, which includes a water collecting trough, the inner wall of the water collecting trough is coated with a rigid compacting agent layer, the interior of the water collecting trough is provided with filling soil, and the top of the water collecting trough is provided with a cover plate; the water collecting trough is a cylindrical structure, and its top extends horizontally toward the outside to form the outer edge of the trough body; a sealing gasket is provided between the outer edge of the trough body and the cover plate; the upper side of the cover plate is covered with a waterproof membrane, and the waterproof membrane at least covers the outer edge of the trough body and the cover plate; a waterproof layer is provided on the upper side of the waterproof membrane, and a sand layer is provided on the upper side of the waterproof layer; the interior of the waterproof layer and the sand layer are doped with concrete waterproof compacting agent.

[0007] In some embodiments, the volume content of the concrete waterproofing compacting agent in the waterproof layer is greater than the volume content of the concrete waterproofing compacting agent in the sand layer.

[0008] In some embodiments, the rigid densifier layer is FS101, and its thickness is 0.5-3 mm.

[0009] In some embodiments, the sealing gasket is made of rubber with a thickness of 3-5 mm, and the width of the sealing gasket is greater than or equal to the length of the outer edge of the groove body.

[0010] In some embodiments, the sealing gasket is made of fluororubber, and its inner edge is located inside the water collection tank.

[0011] In some embodiments, the waterproof membrane is a polymer waterproof membrane with a thickness of 1.5 mm or 2 mm.

[0012] In some embodiments, the volume content of the concrete waterproofing compacting agent in the waterproof layer is 8%.

[0013] In some embodiments, the volume content of the concrete waterproofing and compacting agent in the sand layer is 5%.

[0014] In some embodiments, the waterproof layer has a thickness of 30-50 mm.

[0015] In some embodiments, the sand layer has a thickness of 80-120 mm.

[0016] Beneficial effects of the utility model:

[0017] The utility model provides a waterproof structure for foundation pit construction, which has a reasonable structure and is convenient to construct. The combined sealing of the waterproof coiled material, the waterproof layer and the sand layer can avoid the backflow of groundwater in the foundation pit and effectively ensure the waterproofness of the bottom of the foundation pit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above advantages of the present invention will become clearer and easier to understand through the detailed description made in conjunction with the following drawings, which are only schematic and do not limit the present invention, wherein:

[0019] Figure 1 It is a schematic diagram of a waterproof structure for foundation pit construction described in the utility model;

[0020] Figure 2 yes Figure 1 The corresponding partial enlarged image of point A;

[0021] Figure 3 It is a schematic diagram of the water collection tank described in the utility model. DETAILED DESCRIPTION

[0022] Figures 1 to 3 It is a schematic diagram of a waterproof structure for foundation pit construction described in the present application. The present utility model is described in detail below in conjunction with specific embodiments and drawings.

[0023] The embodiments described herein are specific embodiments of the present invention, which are used to illustrate the concept of the present invention, are explanatory and exemplary, and should not be interpreted as limiting the embodiments of the present invention and the scope of the present invention. In addition to the embodiments described herein, those skilled in the art can also adopt other obvious technical solutions based on the claims and the contents disclosed in the specification of this application, including technical solutions that adopt any obvious replacement and modification of the embodiments described herein.

[0024] The drawings of this specification are schematic diagrams, which assist in explaining the concept of the utility model and schematically show the shapes of various parts and their mutual relationships. Please note that in order to clearly show the structure of various components of the embodiments of the utility model, the drawings are not drawn according to the same scale. The same reference numerals are used to represent the same parts.

[0025] A schematic diagram of a waterproof structure for foundation pit construction according to the utility model is shown as follows: Figure 1 The waterproof structure of the foundation pit construction includes a water collecting tank 10, the inner wall of which is coated with a rigid densifier layer 11. Figure 3 shown.

[0026] Furthermore, the interior of the water collecting tank 10 is filled with soil, and a cover plate 20 is provided on the top thereof. Figure 2 When constructing at the bottom of the foundation pit, it is necessary to place a water collection tank 10 at the bottom of the foundation pit to collect groundwater generated during construction, and then set a suction pump ( Figure 1 The groundwater overflowing during the construction process is pumped to other areas. Then, the suction pump and its corresponding pipeline are taken out, and filling soil is arranged inside the water collecting tank 10.

[0027] Figure 3 In the illustrated embodiment, the water collection trough 10 is a cylindrical structure, the top of which extends horizontally outward to form an outer edge 12 of the trough body; a sealing gasket 30 is arranged between the outer edge 12 of the trough body and the cover plate 20; the upper side of the cover plate 20 is covered with a waterproof membrane 40, and the waterproof membrane 40 at least covers the outer edge 12 of the trough body and the cover plate 20; a waterproof layer 50 is arranged on the upper side of the waterproof membrane 40, and a sand layer 60 is arranged on the upper side of the waterproof layer 50; the interior of the waterproof layer 50 and the sand layer 60 are doped with concrete waterproof compacting agent.

[0028] The volume content of the concrete waterproofing compacting agent in the waterproof layer 50 is greater than the volume content of the concrete waterproofing compacting agent in the sand layer 60. In some embodiments, the volume content of the concrete waterproofing compacting agent in the waterproof layer 50 is 8%; the volume content of the concrete waterproofing compacting agent in the sand layer 60 is 5%, so as to ensure the combined effect of the waterproof layer 50 and the sand layer 60.

[0029] The rigid densifier layer 11 is FS101, and its thickness is 0.5-3mm. Preferably, the rigid densifier layer 11 is 1mm.

[0030] The sealing gasket 30 is made of rubber, and has a thickness of 3-5 mm. The width of the sealing gasket 30 is greater than or equal to the length of the outer edge of the groove body 12. Preferably, the thickness of the sealing gasket 30 is 4 mm.

[0031] The sealing gasket 30 is made of fluororubber, and its inner edge is located inside the water collecting tank 10 .

[0032] The waterproof coiled material 40 is a polymer waterproof coiled material with a thickness of 1.5 mm or 2 mm.

[0033] The thickness of the waterproof layer 50 is 30-50 mm, and the thickness of the sand layer 60 is 80-120 mm.

[0034] Compared with the shortcomings and deficiencies of the prior art, the utility model provides a waterproof structure for foundation pit construction, which has a reasonable structure and is easy to construct. Through the combined sealing of the waterproof membrane, the waterproof layer and the sand layer, the backflow of groundwater in the foundation pit is avoided, and the waterproofness of the bottom of the foundation pit is effectively ensured.

[0035] The present utility model is not limited to the above-mentioned implementation modes. Anyone can derive other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in the shape or structure, any technical solution that is the same or similar to that of the present application falls within the protection scope of the present utility model.

Claims

1. A waterproof structure for foundation pit construction, characterized in that: The invention comprises a water collecting trough (10), the inner side wall of which is coated with a rigid densifier layer (11), the interior of the water collecting trough (10) is provided with filling soil, and the top of the water collecting trough (10) is provided with a cover plate (20); the water collecting trough (10) is a cylindrical structure, the top of which extends horizontally toward the outside to form an outer edge of the trough (12); a sealing gasket (30) is provided between the outer edge of the trough (12) and the cover plate (20); the upper side of the cover plate (20) is covered with a waterproof roll material (40), and the waterproof roll material (40) at least covers the outer edge of the trough (12) and the cover plate (20); a waterproof layer (50) is provided on the upper side of the waterproof roll material (40), and a sand layer (60) is provided on the upper side of the waterproof layer (50); the interior of the waterproof layer (50) and the sand layer (60) are mixed with a concrete waterproof densifier.

2. The waterproof structure for foundation pit construction according to claim 1, characterized in that: The volume content of the concrete waterproofing and compacting agent in the waterproof layer (50) is greater than the volume content of the concrete waterproofing and compacting agent in the sand layer (60).

3. The waterproof structure for foundation pit construction according to claim 1, characterized in that: The rigid densifier layer (11) is FS101, and its thickness is 0.5-3 mm.

4. The waterproof structure for foundation pit construction according to claim 1, characterized in that: The sealing gasket (30) is made of rubber and has a thickness of 3-5 mm. The width of the sealing gasket (30) is greater than or equal to the length of the outer edge (12) of the groove body.

5. The waterproof structure for foundation pit construction according to claim 4, characterized in that: The sealing gasket (30) is made of fluororubber, and its inner edge is located inside the water collecting tank (10).

6. The waterproof structure for foundation pit construction according to claim 1, characterized in that: The waterproof coiled material (40) is a polymer waterproof coiled material, and its thickness is 1.5 mm or 2 mm.

7. The waterproof structure for foundation pit construction according to claim 2, characterized in that: The volume content of the concrete waterproofing compacting agent in the waterproof layer (50) is 8%.

8. The waterproof structure for foundation pit construction according to claim 2, characterized in that: The volume content of the concrete waterproofing and compacting agent in the sand layer (60) is 5%.

9. The waterproof structure for foundation pit construction according to claim 7, characterized in that: The waterproof layer (50) has a thickness of 30-50 mm.

10. The waterproof structure for foundation pit construction according to claim 8, characterized in that: The thickness of the sand layer (60) is 80-120 mm.

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