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Method for preparing soil for analogue test

A technology of simulation test and sample soil, which is applied in the field of preparation of soil for indoor bucket foundation small model test and centrifuge test, to shorten the research work process and save research funds

Inactive Publication Date: 2008-10-01
INST OF MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

Therefore, on the basis of our lack of research experience in bucket foundation model tests, it is not appropriate to simply and arbitrarily choose a kind of sand or clay as the test soil.

Method used

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  • Method for preparing soil for analogue test
  • Method for preparing soil for analogue test
  • Method for preparing soil for analogue test

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Experimental program
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Embodiment Construction

[0013] Preparation steps:

[0014] 1) Take an appropriate amount of undisturbed soil for physical property experiments and analysis to obtain particle gradation, density, and permeability coefficient.

[0015] 2) Obtain the particle gradation curve of undisturbed soil by above-mentioned;

[0016] 3) Prepare sampling soil (fine sand in Zhangzhou, silty clay at a construction site in Beijing, mixed fine sand) so that it is close to the particle gradation curve in step 2);

[0017] 4) For the sample soil in step 3, according to the density of the undisturbed soil, carry out the experiment and analysis of the mechanical properties of the triaxial compression shear. If the stress is large and the permeability coefficient is large, the sample soil is re-mixed, and the fine-grained soil is added in an appropriate amount. If the stress is small and the permeability coefficient is small, re-mix the sampled soil and increase the amount of coarse-grained soil;

[0018] 5) When the stre...

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Abstract

The invention discloses a manufacture method for analysis earth that includes the following steps: taking physical characteristic analysis to parent soil and the matter properties experiment of particle, proportion, density, unit weight and permeability coefficient; gaining the particle class curve, density, penetrating parameter from the experiments; fetching sample earth to make it close to the particle class curve; taking mechanical property and analysis of triaxiality compression shear; when the sample earth has the corresponding stress-strain, deformation-strain and penetrating parameter, taking large quantity matching according to the sample earth. The invention has close statics feature as undisturbed sand that could sharply save research outlay and shorten research process.

Description

technical field [0001] The invention relates to a method for preparing soil for indoor barrel-shaped foundation small model test and centrifuge test in a concrete site of an ocean platform. Background technique [0002] Indoor bucket foundation small model test and centrifuge test use a large amount of soil (about 1.5 tons). Therefore, selecting and determining the test soil is one of the primary and key problems to be solved in the barrel foundation test research. The determination of the test soil has certain difficulty. On the one hand, because of the high cost of offshore drilling sampling and the small amount of soil taken, the engineering department is actually unable to provide so much test soil. On the other hand, the oil company also requires that the final results of the research on the bearing capacity of the barrel foundation can be used for the barrel foundation design of the specific site of the offshore platform. According to the existing research results, f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28G01N33/24
Inventor 王淑云鲁晓兵
Owner INST OF MECHANICS CHINESE ACAD OF SCI
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