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

A hollow cylinder sample and hollow cylinder technology, which is applied in the field of geotechnical engineering, can solve the problems that the reaction liquid cannot be discharged and the disturbance is large, and achieve the effects of preventing uneven cementation, avoiding disturbance and ensuring standardization.

Active Publication Date: 2021-05-04
NANJING UNIV OF TECH +1
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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

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

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Embodiment Construction

[0044] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. The horizontal, vertical, first, second, third, fourth, fifth And the sixth is only for the purpose of better explaining the direction and distinguishing function, and cannot be used as the limiting basis of the present invention.

[0045] In this embodiment, the annular pressure plate 5 and the base 1 are detachably connected by screws. In other embodiments, an integrated connection can be used. The specific size of the sample preparation device is as follows: inner diameter 60mm, outer diameter 100mm, height 200mm; inner cylinder 3 size: outer Diameter 60mm, inner diameter 40mm, wall thickness 10mm, total height 259mm, size of permeable plate 2: inner diameter 60mm, outer diameter 100mm, height 10mm, ring pressure plate 5 is 35mm from the top of base 1, the bottom of...

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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...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N1/36G01N3/02G01N3/22G01N3/24
CPCG01N1/28G01N1/36G01N3/22G01N3/24G01N3/02G01N2203/0021G01N2203/0025G01N2203/0298G01N2001/366
Inventor 刘璐司胜重张淑姗张鑫磊高洪梅王志华
Owner NANJING UNIV OF TECH
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