Microorganism sand pile forming device and method

Abstract

The invention belongs to the technical field of civil engineering, and discloses a microorganism sand pile forming device and a microorganism sand pile forming method. The microorganism sand pile forming method mainly comprises the following steps: a bacterium solution having certain activity is mixed with a calcium chloride solution and a urea solution, a mixture is injected into sandy soil in a thin-walled cylinder through a grouting pipe, a solution after reaction is pumped out through slurry recycling pipes, grouting and slurry recycling are carried out repeatedly for 2-3 times, a new mixed solution is adopted, and the previous steps are repeated for 3-5 times till pile forming is completed. The microorganism sand pile forming device and the microorganism sand pile forming method take undisturbed sand as an engineering construction material in island-reef and desert areas, and employ a microorganism solidification technology for pile forming, no pore forming is required, the disturbance of in-situ grouting is little, the construction is simple and convenient, the pile forming quality is high, the possible problems that the transportation volume of mechanical equipment and raw materials is high, the construction is difficult, a safety risk is high and ecological environments of the island-reef and desert areas may be destroyed when sandy soil pile foundations are constructed in the island-reef and desert areas can be solved effectively, and the microorganism sand pile forming device and the microorganism sand pile forming method have important significances.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to a microbial sand pile forming device and method. Background technique [0002] The development trend of civil engineering has been developed to the ocean, desert and space. Project construction on islands, reefs and desert areas is imperative and cannot be delayed. For engineering construction on islands and reefs far away from land and in desert areas, the environment is harsh, the foundation soil is mainly sandy soil, and there is a lack of building materials. The required large-scale construction equipment and various building materials need to be transported over long distances, and the cost is very expensive. . Microbial immobilization, or microbially induced calcium carbonate precipitation (MICP) technology, is a new type of soil immobilization technology, the principle of which is to provide nitrogen sources and calcium ion sources to certain specif...

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Problems solved by technology

[0003] To sum up, the problems existing in the prior art are: there is a lack of building materials for engineering construction in islands and reefs far away from land and desert areas, and the required large-scale construction equipment and various building materials need to be transported over long distances, and the cost is very expensive; In addition, pile foundation construction in non-cohesive sandy soil has high safety risks and difficult construction

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