Hollow cylindrical sample preparation device for microorganism solidified sandy soil and use method

Abstract

The invention discloses a hollow cylindrical sample preparation device for microorganism solidified sandy soil and a use method thereof. The device comprises a base, an inner cylinder, an outer cylinder and an injection cap, the inner cylinder, the outer cylinder and an annular support seat are utilized to form a sample bin, and an injection channel and a liquid discharge groove are utilized to ensure injection and discharge of a liquid; mould cylinders used by the inner cylinder and the outer cylinder are spliced by adopting ''V''-shaped bayonets, and iron rods penetrate through traction holes in small petals of the inner cylinder so that disturbance to a hollow cylindrical sample is effectively avoided, and the standard size of the hollow cylindrical sample and the reliability of the test are ensured; and the technical problems that a bacterial liquid and a reaction liquid cannot be discharged in the preparation process of the hollow cylindrical microorganism solidified sample and disturbance is large during sampling are effectively solved, the integrity of the sample is guaranteed, and the reliability of an experimental result is improved.

Description

technical field [0001] The invention relates to the field of geotechnical engineering, in particular to a hollow cylindrical sample preparation device and a use method for microbially solidified sandy soil. Background technique [0002] Since the last century, people have gradually realized that the activities of microorganisms will have an impact on the physical and mechanical properties of soil. Microbial grouting reinforcement technology is to use the metabolic activities of microorganisms to undergo a series of biochemical reactions with some substances in the environment, and finally induce the formation of calcium carbonate precipitation or other mineral precipitation, so as to cement the soil to improve the properties of the soil. . At present, most studies on the mechanical properties of microbially stabilized sand are carried out through static and dynamic triaxial instruments, but they cannot simulate complex stress paths such as principal stress rotation. The re...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problems that the bacterial liquid and reaction liquid cannot be discharged during the preparation process of the hollow cylindrical microbial solidification sample and the disturbance is relatively large during sampling, the present invention proposes a hollow cylindrical sample preparation device and using method for microbial solidification of sand and soil. The sample preparation device is easy to operate, and can quickly realize the preparation of hollow cylindrical samples of microbial soil, while ensuring the integrity of samples during sampling

Images