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MICP solidified calcareous sand bidirectional grouting cylindrical sample preparation instrument

A technology of cylindrical sample and sample preparation apparatus, which is applied in the field of sample preparation apparatus, can solve the problems that the in-situ injection of MICP slurry cannot be realized, and the quantitative grouting and non-quantitative grouting cannot be simulated, so as to improve the integrity of the sample and make The sampling process is controllable and the effect of grouting is uniform

Pending Publication Date: 2020-11-27
ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing sample preparation equipment can only complete the preparation of calcareous sand cylindrical samples, and cannot realize the in-situ injection of MICP grout, nor can it simulate quantitative and non-quantitative grouting on site.

Method used

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  • MICP solidified calcareous sand bidirectional grouting cylindrical sample preparation instrument
  • MICP solidified calcareous sand bidirectional grouting cylindrical sample preparation instrument
  • MICP solidified calcareous sand bidirectional grouting cylindrical sample preparation instrument

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0027] Such as figure 1 Shown is a kind of MICP solidified calcareous sand two-way grouting cylinder sample preparation instrument of the present invention, the sample preparation instrument includes: slurry placement dish 1, peristaltic pump 2, T-shaped rubber joint 3, upper grouting pipe 4, Lower grouting pipe 5, rubber plug 6, composite plug 7, ferrule 8, double-valve glass tube 9;

[0028] The grout storage dish 1 is equipped with a grouting liquid, and the bottom of the slurry storage dish 1 is provided with a grouting main pipe; the peristaltic pump 2 is arranged on the grouting main pipe, and the other end of the grouting main pipe passes through a T-shaped rubber joint 3 is connected with the upper grouting pipe and the lower grouting pipe, and is used to pump the grouting liquid from the grouting vessel 1 through the upper grouting pi...

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Abstract

The invention discloses an MICP solidified calcareous sand bidirectional grouting cylindrical sample preparation instrument. The sample preparation instrument comprises a slurry placing vessel, a peristaltic pump, an upper grouting pipe, a lower grouting pipe, a T-shaped rubber joint, a rubber plug, a composite plug, a hoop and a double-valve type glass tube. The whole grouting process of the sample preparation instrument is controllable, for quantitative grouting, the switch peristaltic pump can be used for meeting related stipulations of standing time after one kind of slurry is injected, and the slurry can be freely replaced in the slurry placing vessel; for non-quantitative grouting, when pores of the calcareous sand sample are completely filled and grouting cannot be continued, the peristaltic pump is turned off, and grouting is stopped. The MICP solidified calcareous sand bidirectional grouting cylindrical sample preparation instrument is a technological innovation, in-situ MICPreinforcement of calcareous sand triaxial samples is achieved through undisturbed bidirectional grouting of calcareous sand cylindrical samples, the whole grouting process is visible and controllable,the sample preparation efficiency is high, and the integrity is high.

Description

technical field [0001] The invention relates to a sample preparation instrument, in particular to an MICP solidified calcareous sand two-way grouting cylindrical sample preparation instrument. Background technique [0002] The seabed of the South my country Sea is rich in calcareous sand, which is usually used as foundation or roadbed filler for island and reef construction. However, natural calcareous sand has low strength and is easily broken, so it cannot be directly used as the foundation of island and reef buildings and structures. Therefore, some scholars try to use ecological reinforcement technologies such as Microbially Induced Carbonate Precipitation (MICP) to realize the solidification of calcareous sand foundation (or subgrade), and use laboratory tests or field tests to stabilize calcium sand by MICP. The mechanical properties of the sand are evaluated. When performing indoor tests on MICP-cured calcareous sand such as dynamic and static triaxial tests, unconf...

Claims

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Application Information

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IPC IPC(8): G01N1/28G01N1/31
CPCG01N1/28G01N1/286G01N1/31
Inventor 朱剑锋杨浩
Owner ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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