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Sprayed concrete for foundation pit slope, and construction method thereof

A shotcrete and slope technology, which is used in infrastructure engineering, excavation, sustainable waste treatment, etc., can solve the problems of high concrete rebound rate and easy collapse of the construction plane, shorten the setting time, reduce the self-weight, and accelerate the solidification. effect of knots

Active Publication Date: 2022-01-04
江苏镇淮建设集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problems in the prior art that ordinary shotcrete has a high rebound rate and the construction plane is easy to collapse

Method used

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  • Sprayed concrete for foundation pit slope, and construction method thereof
  • Sprayed concrete for foundation pit slope, and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A shotcrete for a foundation pit slope and a construction method thereof, is characterized in that the shotcrete mainly includes three parts: a grouting layer, a cover layer, and a concrete layer, and the grouting layer includes: 50 parts of water glass solution, garbage bottom 30 parts of slag powder, 10 parts of MgO, 20 parts of blast furnace ferronickel slag powder, 20 parts of magnesium chloride, and 100 parts of water; the garbage bottom slag powder needs to be immersed in 0.05mol / L hydrochloric acid solution for 3 hours, and the mass ratio of garbage bottom slag powder to solution 1:10, then add water glass solution dropwise while stirring in the garbage bottom slag powder solution, the stirring speed is 30 rpm, the mass ratio of water glass solution and garbage bottom slag powder is 1:80, then suction filtration, washing , drying; the covering layer includes: cotton fiber, water glass solution; the concrete layer includes: 500 parts of cement clinker, 100 parts of...

Embodiment 2

[0037] A shotcrete for a foundation pit slope and a construction method thereof, is characterized in that the shotcrete mainly includes three parts: a grouting layer, a cover layer, and a concrete layer, and the grouting layer includes: 20 parts of water glass solution, garbage bottom 50 parts of slag powder, 1 part of MgO, 10 parts of magnesium chloride, and 50 parts of water; the bottom slag powder of the garbage needs to be immersed in the hydrochloric acid solution of 0.2mol / L for 1h, and the mass ratio of the bottom slag powder of the garbage to the solution is 1:20, and then poured into the garbage Water glass solution is added dropwise while stirring in the bottom slag powder solution, the stirring speed is 10 rpm, the mass ratio of water glass solution and garbage bottom slag powder is 1:30, then suction filtration, washing and drying; the covering layer includes : cotton fiber, water glass solution; the concrete layer includes: 300 parts of cement clinker, 200 parts of...

Embodiment 3

[0047] A shotcrete for a foundation pit slope and a construction method thereof, is characterized in that the shotcrete mainly includes three parts: a grouting layer, a cover layer, and a concrete layer, and the grouting layer includes: 30 parts of water glass solution, garbage bottom 40 parts of slag powder, 5 parts of MgO, 15 parts of blast furnace ferronickel slag powder, 15 parts of magnesium chloride, and 80 parts of water; the garbage bottom slag powder needs to be immersed in 0.1mol / L hydrochloric acid solution for 2 hours, and the mass ratio of garbage bottom slag powder to solution 1:15, then add water glass solution dropwise while stirring in the garbage bottom slag powder solution, the stirring speed is 20 rpm, the mass ratio of water glass solution and garbage bottom slag powder is 1:50, then suction filtration, washing , drying; the covering layer includes: cotton fiber, water glass solution; the concrete layer includes: 400 parts of cement clinker, 150 parts of li...

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Abstract

The invention relates to a construction method of a sprayed concrete for a foundation pit slope. The sprayed concrete mainly comprises a grouting layer, a covering layer and a concrete layer, and the grouting layer comprises 20-50 parts of a water glass solution, 30-50 parts of garbage bottom slag powder, 1-10 parts of MgO, 10-20 parts of magnesium chloride and 50-100 parts of water; the garbage bottom slag powder needs to be immersed in a 0.05-0.2 mol / L hydrochloric acid solution for 1-3 h before being used, the mass ratio of the garbage bottom slag powder to the solution is 1: 10-1: 20, then a water glass solution is dropwise added into the bottom slag powder solution while stirring is conducted, the stirring speed is 10-30 r / min, the mass ratio of the water glass solution to the garbage bottom slag powder is 1: 30-1: 80, and then suction filtration, washing and drying are conducted; the covering layer comprises cotton and linen fibers and a water glass solution; and the concrete layer is prepared from 300-500 parts of cement clinker, 100-200 parts of lithium slag powder, 300-500 parts of ceramsite, 5-20 parts of ferric chloride, 10 -20 parts of microcrystalline cellulose and 120-150 parts of water. The problems that common sprayed concrete is prone to collapse and high in rebound rate are solved.

Description

technical field [0001] The invention belongs to the technical field of shotcrete, and in particular relates to a construction method of shotcrete for foundation pit slopes. Background technique [0002] Shotcrete is a kind of construction material that borrows relevant concrete spraying machinery to spray concrete, mortar and other materials onto the construction plane. It has been popularized and applied quickly due to its fast construction. However, at present, the rebound rate of shotcrete is relatively high—that is, the concrete material falls too much after being sprayed onto the construction plane. In addition, the construction plane is not firm. After spraying the concrete, the self-weight of the construction plane will increase, so that the construction plane will not be stable. The collapse brings a greater safety risk to the construction of shotcrete. [0003] Patent 202010916438X discloses a shotcrete and its construction method. A shotcrete is composed of a ceme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/32C04B28/26C04B28/00E02D17/20E02D15/02C04B18/24C04B12/04C04B18/04C04B18/02C04B22/12C04B24/38C04B18/14C04B20/02
CPCC04B28/32C04B28/26C04B28/00E02D17/20E02D17/202E02D15/02C04B18/248C04B12/04C04B18/0481C04B18/023C04B22/12C04B24/383C04B18/144C04B20/023E02D2300/002E02D2300/0045E02D2250/003E02D2250/0023C04B2111/00612C04B2111/00155C04B2201/50Y02W30/91
Inventor 薛玉龙陈胜韩砚缇蒋亮王甜甜李保亮陈辉
Owner 江苏镇淮建设集团有限公司
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