Method for crushing and solidifying cohesive soil by spraying high-pressure liquid-gas mixed fluid

Abstract

The invention discloses a method for crushing and solidifying cohesive soil by spraying a high-pressure liquid-gas mixed fluid. The method comprises the following steps: detecting the characteristicsof cohesive soil on a construction site, including detection of the water content and the clay particle content, then pre-burying a pipeline into the cohesive soil, and starting to prepare liquid-gasmixed fluid; then, applying the pressure on the liquid-gas mixed fluid, after pressing is finished, conveying the high-pressure liquid-gas mixed fluid into the cohesive soil at a certain burial depththrough a pipeline and spraying the fluid into the cohesive soil through spraying devices such as a spraying head, applying the shearing force to a soil body, cutting and crushing the soil body, and in the cutting and crushing process of the soil body through the high-pressure spraying mixed fluid, fully mixing a curing agent solution in the mixed fluid with the soil body broken particles to ensure that the soil body broken particles react with the soil body, so that the soil body is cured. According to the method, the soil body can be maintained in situ, land occupation or land acquisition isnot needed, and the method is efficient and environment-friendly.

Description

technical field [0001] The invention relates to the technical field of civil engineering building construction, in particular to a method for crushing and solidifying cohesive soil by spraying high-pressure liquid-gas mixed fluid. Background technique [0002] The subgrade filling materials of high-grade highways are generally medium sand and gravel soil, etc. In some areas, such as deltas and plains, and the environmental protection requirements are becoming more and more stringent, the shortage of subgrade fillers is very serious. Moreover, in highway construction In the process, there will be a lot of excavation, and there will be a lot of bad filling soil such as clay and saline soil that need to be discarded. If they are discarded or piled up for treatment, a large amount of land resources will be occupied and huge project costs will be increased. If the cohesive soil and other poor filling soil produced by excavation are improved and solidified to meet the characterist...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of high-pressure liquid-air mixed fluid jet crushing and the method for solidifying cohesive soil, to solve the construction technology that existing layered paving and spraying solidifying agent are proposed in the above-mentioned background technology, it is difficult to make both fully mixed , especially for soils with high clay content and physical state of hard-plastic to soft-plastic, and it is not convenient to realize the requirements of "green construction" and can save a lot of engineering costs