Vacuum grouting triaxial sample curing-sample preparation-sampling-storage equipment and application

Abstract

The invention discloses vacuum grouting triaxial sample curing-sample preparation-sampling-storage equipment and application. The equipment comprises an adjustable hydraulic loading device, a sample preparation barrel, a slurry storage vessel, a peristaltic pump, a sample storage barrel, an adjustable base, a buffer bottle, a vacuum pump, a vacuum meter and a redundant slurry storage vessel. The equipment can be used for realizing reasonable preservation of the undisturbed soil triaxial test sample, vacuum grouting solidification-sample preparation-sampling-preservation of the undisturbed soil or disturbed soil triaxial test sample, or solidification-sample preparation-sampling-preservation of the triaxial test sample solidified in a stirring mode. According to the method, vacuum negative pressure grouting is adopted, so that the uniformity and the integrity of the triaxial curing sample are high, and meanwhile, the mechanical operation of curing, sample preparation, sampling and storage is performed, so that the probability of sample destruction due to misoperation in the sample preparation and sampling process can be remarkably reduced, the protection of the prepared soft sample in the initial stage can be realized, and the evaporation of moisture is prevented; deformation of the sample due to self weight is inhibited, and test precision is improved.

Description

technical field [0001] The invention belongs to the technical field of solidified soil triaxial sample preparation technology interdisciplinary with geotechnical engineering, chemistry, etc., and relates to a triaxial sample sample preparation device suitable for various test forms, in particular to a vacuum grouting triaxial sample preparation device. Shaft sample curing-sample preparation-sampling-storage equipment and methods of use. Background technique [0002] Poor foundation solidification has always been an inevitable topic in construction engineering, and it is also a key research direction for scholars in the field of geotechnical engineering. Chemical solidification is the mainstream solidification method at present. Before determining a reasonable chemical solidification method, a large number of experiments need to be carried out indoors to determine the solidification effect. As well as the mechanical properties of the soil itself, the currently widely used ind...

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Problems solved by technology

[0002] Poor foundation solidification has always been an inevitable topic in construction engineering, and it is also a key research direction for scholars in the field of geotechnical engineering. Chemical solidification is the mainstream solidification method at present. Before determining a reasonable chemical solidification method, a large number of experiments need to be carried out indoors to determine the solidification effect. As well as the mechanical properties of the soil itself, the currently widely used indoor test method for solidified soil is the triaxial test, that is, the soil sample is made into a unit body of the size specified in the "GB / T50123-2019 Standard for Geotechnical Test Methods". However, the traditional compaction sample preparation Due to the inevitable error of human operation and the low curing effect of grouting pipe grouting, the triaxial samples produced by the grouting method and the grouting curing method of the grouting pipe generally have the problems of uneven curing and poor integrity of the sample, which lead to the control group test results Unconvincing problems with large discreteness

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