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Microbial reinforcing non-cohesive soil curing agent and reinforcing method thereof

A non-cohesive soil and microbial technology, applied in chemical instruments and methods, soil protection, building construction, etc., can solve problems such as hindering application, increase saturation, reduce the generation of reinforcement by-product ammonia, and improve uniformity Effect

Active Publication Date: 2019-09-17
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existence of ammonium ions hinders the application of this method. How to reduce or even eliminate the ammonium ions produced after reinforcement is completed. At present, there is no good treatment method in industry and academia.

Method used

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  • Microbial reinforcing non-cohesive soil curing agent and reinforcing method thereof
  • Microbial reinforcing non-cohesive soil curing agent and reinforcing method thereof
  • Microbial reinforcing non-cohesive soil curing agent and reinforcing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0072] 1. Preparatory work before construction:

[0073] 1. Obtain the depth h=3m from the upper surface of the non-cohesive soil layer to be reinforced from the ground surface and the thickness s=5m of the non-cohesive soil layer through investigation;

[0074] 2. Drill a number of wells vertically downward on the surface of the non-cohesive soil layer to be reinforced. All the wells are evenly distributed in a matrix at a distance of 1.5m. All the wells are divided into grouting wells and pumping wells. They are all pumping wells, and the surroundings of the pumping wells are all grouting wells; and a steel flower tube with a diameter of 60mm and a wall thickness of 5mm is inserted into each well, and the length l of the steel flower tube inserted into the ground is 7m; the vertical error of the drilling construction plane is not greater than 80cm;

[0075] 3. A grouting pipe and a pumping pipe are respectively installed in the grouting well and the pumping well. One end of...

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Abstract

The invention discloses a microbial reinforcing non-cohesive soil curing agent and a reinforcing method thereof.The microbial reinforcing non-cohesive soil curing agent comprises a solution A, a solution B, and a solution C, wherein the solution A is a mixed solution formed by an anaerobic ammonium oxidation bacteria solution, a urea solution, and acalcium nitrite solution; the solution B is a Bacillus pasteuriisolution; and the solution C is a mixed solution of potassium hydrogencarbonate, potassium dihydrogen phosphate, magnesium sulfate, calcium chloride, and ferrous sulfate. Curing non-cohesive soil with the microbial reinforcing non-cohesive soil curing agent can effectively reduce ammonium ions in non-cohesive soil, nitrogen issimultaneously generated, and the soil saturation increasing and curing effect is reduced.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a curing agent for microbial reinforcement of cohesive soil and a reinforcement method thereof. Background technique [0002] Cohesionless soil has less clay particles and greater water permeability, and is one of the most common rock-soil media in civil engineering. Cohesionless soil has no inherent cohesion, and is easily damaged under load or seepage. The most common failure case is the liquefaction of sandy soil under earthquake action. In recent years, it has been confirmed that sandy soil, silt soil, and gravel soil may all liquefy, and liquefaction prevention will become the most important part of earthquake and disaster prevention design. The non-cohesive soil caused by seepage is also a common operation risk during the excavation of foundation pit tunnels and pile foundation construction, and the occurrence of quicksand and hole collapse; dam piping is also caused by t...

Claims

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Application Information

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IPC IPC(8): E02D3/12C09K17/00C09K103/00
CPCC09K17/00C09K2103/00E02D3/12
Inventor 陈猷鹏彭梦文何想肖杨晏鹏郭劲松
Owner CHONGQING UNIV
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