Waterproof layer protection structure for steep elevator foundation pit slope

Abstract

The utility model belongs to the field of foundation pit waterproof layers, particularly discloses a steep elevator foundation pit slope waterproof layer protection structure, and adopts the technical scheme that the steep elevator foundation pit slope waterproof layer protection structure comprises a foundation pit slope base body, a shotcrete-bolting reinforcing mesh is arranged on the foundation pit slope base body, a shotcrete layer is arranged on the shotcrete-bolting reinforcing mesh, and the shotcrete layer is arranged on the shotcrete-bolting reinforcing mesh. A cement mortar layer is arranged on the sprayed concrete layer, a waterproof protection layer is arranged on the cement mortar layer, a plurality of protection air bags are arranged on the waterproof protection layer at intervals, and a slope steel bar frame on the foundation pit slope base body is located above the protection air bags and supported by the protection air bags. The protection structure is simple in construction, the side wall of the slope is not hollow, and the slope steel bar frame can be prevented from rolling and damaging the waterproof protection layer.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of foundation pit waterproof layer, in particular, relate to a steep elevator foundation pit slope waterproof layer protection structure. BACKGROUND

[0002] The elevator foundation pit refers to the space drilled for the installation of the elevator, usually located in the underground or ground floor of the building, used for accommodating the elevator equipment and providing the vertical channel required for operation. As an important part of the elevator device, the design and construction of the elevator foundation pit are directly related to the safety and stable operation of the elevator equipment. During the actual construction process of the elevator foundation pit, engineering such as concrete pouring and waterproof treatment is required to meet the special design requirements, such as drainage and moisture-proofing.

[0003] After the existing waterproof protection layer of the elevator foundation pit slope is completed, the elevator foundation pit will be installed with a steel reinforcement frame to be poured. Since the waterproof protection layer on the slope of the elevator foundation pit is relatively thin, the movement of the steel reinforcement during the binding process of the slope steel reinforcement frame will damage the waterproof protection layer, resulting in the loss of the function of the waterproof protection layer. In addition, the slope structure of the existing elevator foundation pit will produce a hollow drum phenomenon, which will also cause the waterproof protection layer to fail. SUMMARY

[0004] In order to solve the problem that the existing elevator foundation pit slope protection layer is easy to fail, the utility model provides a steep elevator foundation pit slope waterproof layer protection structure. The protection structure of the utility model is simple to construct, the slope side wall is not hollow drum, and the slope steel reinforcement frame can prevent the waterproof protection layer from being damaged by rolling.

[0005] To solve the above technical problems, the utility model adopts the technical scheme: a steep elevator foundation pit slope waterproof layer protection structure, which comprises a foundation pit slope base body, a shotcrete support steel mesh is arranged on the foundation pit slope base body, a shotcrete layer is arranged on the shotcrete support steel mesh, a cement mortar layer is arranged on the shotcrete layer, and a waterproof protection layer is arranged on the cement mortar layer. A plurality of protection air bags are arranged on the waterproof protection layer in intervals, and the slope steel reinforcement frame on the foundation pit slope base body is located above the protection air bags and supported by the protection air bags.

[0006] Further, the waterproof protection layer comprises a waterproof roll material layer and a crack-resistant mortar grid layer arranged in sequence from bottom to top.

[0007] Further, the waterproof roll material layer has two layers or three layers.

[0008] Further, the crack-resistant mortar grid layer is composed of a crack-resistant mortar layer coated on a glass fiber grid cloth.

[0009] Further, the protection air bag is a rubber inflatable air bag with a diameter of 40-60mm.

[0010] Furthermore, the thickness of the sprayed concrete layer is 80-100mm.

[0011] Compared with the prior art, the advantages of this utility model are as follows: This utility model levels the surface by applying a cement mortar layer over the sprayed concrete layer, and then lays a waterproof protective layer on top of the cement mortar layer. This prevents hollow areas during the construction of the waterproof protective layer. Furthermore, this utility model incorporates multiple protective airbags on the waterproof protective layer, using these airbags to provide suspended support for the slope reinforcement frame, preventing the slope reinforcement frame from scratching or crushing the waterproof protective layer. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings.

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 for Figure 1 Enlarged view of a portion of point A in the middle.

[0015] In the diagram, 1 represents the foundation pit slope base, 2 represents the shotcrete and anchor support steel mesh, 3 represents the shotcrete layer, 4 represents the cement mortar layer, 5 represents the waterproof protective layer, 51 represents the waterproof membrane layer, 52 represents the crack-resistant mortar mesh layer, 6 represents the protective airbag, and 7 represents the slope steel reinforcement frame. Detailed Implementation

[0016] like Figures 1-2 As shown, the waterproofing protection structure for a steep elevator pit slope includes a pit slope base 1, a shotcrete and anchor support steel mesh 2 on the pit slope base 1, a shotcrete layer 3 on the shotcrete and anchor support steel mesh 2, a cement mortar layer 4 on the shotcrete layer 3, and a waterproof protective layer 5 on the cement mortar layer 4. The waterproof protective layer 5 includes a waterproof membrane layer 51 and a crack-resistant mortar mesh layer 52 arranged sequentially from bottom to top. The waterproof membrane layer 51 has two or three layers. The crack-resistant mortar mesh layer 52 is composed of a fiberglass mesh coated with a crack-resistant mortar layer. Multiple protective airbags 6 are spaced apart on the waterproof protective layer 5. The slope steel reinforcement frame 7 on the pit slope base 1 is located above the protective airbags 6 and is supported by the protective airbags 6.

[0017] The construction process of this utility model is as follows: After the elevator pit is excavated, manual local adjustments are made to ensure the size of the pit cross-section and to reserve the thickness of the waterproof protective layer 5 and the steel reinforcement protective layer. After the elevator pit is adjusted, a shotcrete support steel mesh 2 is laid on the pit slope base 1, and then a shotcrete layer 3 is set on the shotcrete support steel mesh 2. The thickness of the shotcrete layer 3 is 80-100mm. The shotcrete layer 3 ensures the bond between the base layer and the soil of the pit slope base 1.

[0018] After the construction of the shotcrete layer 3 is completed, a 20mm 1:2 cement mortar layer 4 is applied on the surface of the shotcrete layer 3, and a circular arc treatment is performed on the top, bottom and inside corners of the elevator pit to ensure that the waterproof protective layer 5 is not hollow after construction. The waterproof protective layer 5 is constructed after the construction of the cement mortar layer 4 is completed. The waterproof protective layer 5 includes a waterproof membrane layer 51 and a crack-resistant mortar grid layer 52 arranged in sequence from bottom to top. In order to further improve the waterproof performance, a simple cement mortar slurry treatment can be performed on the surface of the waterproof membrane after the construction of the waterproof membrane is completed, and then the crack-resistant mortar and glass fiber grid cloth (crack-resistant mortar grid layer 52) are used for treatment.

[0019] Finally, a plurality of protective air bags 6 are arranged on the waterproof protective layer 5 at intervals. The protective air bags 6 are rubber inflatable air bags with a diameter of 40-60mm. The slope reinforcing bar frame 7 on the slope body 1 of the pit is located above the protective air bags 6 and is supported by the protective air bags 6. After the entire branch-shaped reinforcing bar framework is tied, the slope reinforcing bar frame 7 will be erected and will not come into contact with the waterproof protective layer 5. At this time, the protective air bags 6 can be removed.

[0020] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge possessed by those skilled in the art without departing from the purpose of the utility model.

Claims

1. A steep elevator foundation pit slope waterproof layer protection structure, characterized in that: The foundation pit slope base body (1) is provided with a shotcrete and anchor reinforcement mesh (2), a shotcrete layer (3) is arranged on the shotcrete and anchor reinforcement mesh (2), a cement mortar layer (4) is arranged on the shotcrete layer (3), a waterproof protective layer (5) is arranged on the cement mortar layer (4), a plurality of protective air bags (6) are arranged on the waterproof protective layer (5) at intervals, and a slope reinforcement frame (7) on the foundation pit slope base body (1) is located above the protective air bags (6) and is supported by the protective air bags (6).

2. The steep elevator excavation slope waterproof layer protection structure according to claim 1, characterized in that: The waterproof protective layer (5) comprises a waterproof roll material layer (51) and a crack-resistant mortar grid layer (52) arranged in sequence from bottom to top.

3. The steep elevator excavation slope waterproof layer protection structure according to claim 2, characterized in that: The waterproof roll material layer (51) has two layers or three layers.

4. The steep elevator excavation slope waterproof layer protection structure according to claim 2, characterized in that: The crack-resistant mortar grid layer (52) is composed of a crack-resistant mortar layer coated on a glass fiber grid cloth.

5. The steep elevator excavation slope waterproof layer protection structure according to claim 1, characterized in that: The protective air bag (6) is a rubber inflatable air bag with a diameter of 40-60 mm.

6. The steep elevator excavation slope waterproof layer protection structure according to claim 1, characterized in that: The thickness of the shotcrete layer (3) is 80-100 mm.

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