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Test device and method based on MICP reinforced calcareous coarse-grained soil

A test device and test method technology, applied in the field of soil reinforcement, to achieve the effect of easy operation and reasonable arrangement

Active Publication Date: 2019-03-12
HOHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the field of calcareous coarse-grained soil (the particle size range of calcareous coarse-grained soil is generally 5-20mm), due to its large particles, large pores, and calcareous characteristics, the previous test equipment and test procedures are no longer applicable

Method used

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  • Test device and method based on MICP reinforced calcareous coarse-grained soil

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Embodiment Construction

[0043] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0044] A test device for strengthening calcareous coarse-grained soil based on MICP includes a sample preparation device, a permeability coefficient measurement device and an unconfined compressive strength test device.

[0045] Such as figure 1 As shown, the sample preparation device includes a container rack 12, a sample preparation container 1, a partition 8 and a sample taking piece 7; , take the top of the sample piece 7 out of the opening of the sample preparation container 1, the shape of the partition 8 matches the inner cavity of the sample preparation container 1, the partition 8 has a through hole 10, and the partition 8 is placed in the sample preparation container 1 At the bottom ...

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Abstract

The invention discloses a test device based on MICP reinforced calcareous coarse-grained soil. The test device based on the MICP reinforced calcareous coarse-grained soil comprises a specimen preparation device, a permeability coefficient measuring device and an unconfined compressive strength test device. Meanwhile, the invention also discloses a specific test method. The test method comprises the following steps: successively measuring specimens, measuring the permeability coefficients of the specimens and measuring the content of calcium carbonate. For the characteristics of large grain size, large pores and calcareous property of the calcareous coarse-grained soil, the test device and method are provided, are easy to operate and reasonable in arrangement, can be used for researching physical and mechanical properties of MICP cemented calcareous coarse-grained soil, and lay a foundation for promoting an MICP technology to the field of calcareous coarse-grained soil.

Description

technical field [0001] The invention relates to a test device and method for strengthening calcareous coarse-grained soil based on MICP, belonging to the field of soil reinforcement. Background technique [0002] The use of microbial cementation to stabilize soil is a new soil reinforcement method that has emerged in recent years. This technology uses urease produced by microbial metabolism to decompose urea to generate carbonate ions, which combine with calcium ions in the environment to form cemented calcium carbonate crystals, thereby improving the basic mechanical properties of soil. The current Microbe-Induced Calcium Carbonate Precipitation (MICP) technology has made great progress in the field of sandy soil and silt soil with good permeability. It has good erosion resistance and soil strength, and can meet certain engineering needs. The laboratory also has a relatively complete test device and test process, and the indicators of concern, such as strength, permeabilit...

Claims

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Application Information

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IPC IPC(8): G01N15/08G01N1/28G01N5/04
CPCG01N1/28G01N5/04G01N15/08
Inventor 谭慧明陈福茂陈佳于淙洋陈传培徐天航
Owner HOHAI UNIV
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