A cpt test device and test method capable of simulating real soil equal stiffness boundary conditions

Abstract

The invention discloses a CPT test device and a test method capable of simulating the boundary conditions of equal stiffness of real soil. The test device of the invention mainly includes an outer box, a soil sample box, a pressurized cover plate and the like. The inner box is composed of a plurality of equal-stiffness side wall units; the invention solves the problem that the boundary conditions of the soil cannot be accurately simulated in the indoor test by simulating the far-field equal-stiffness soil through the spring, and has simple operation, accurate test results and outstanding advantages. Through the experimental device of the invention, the CPT static penetration research of complex soil can be carried out indoors, providing a research basis for the interpretation of complex strata under real conditions.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and relates to a CPT (cone penetration test) test device and a test method capable of simulating the boundary conditions of equal stiffness of real soil. Background technique [0002] In geotechnical engineering investigation, CPT static sounding is an important test method to obtain formation parameters. In recent years, with the extension of civil engineering construction to areas with more complex geological conditions (gas-bearing formations, sediment mixed formations, etc.), it has become more difficult to reflect the real formation conditions through the interpretation of CPT test data. Therefore, it is necessary to carry out CPT static penetration test research on complex soil in the laboratory to provide a research basis for the interpretation of complex strata. However, the real soil boundary condition is an equal stiffness boundary, that is, the process of inserting the CPT i...

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Problems solved by technology

[0003] Aiming at the problem that the soil boundary conditions cannot reflect the real soil boundary during the CPT static penetrating test in the laboratory, the present invention proposes a CPT test device and test method capable of simulating the real soil equal-stiffness boundary conditions

It has many advantages such as adjustable soil boundary stiffness, convenient loading, and boundary conditions that are more suitable for actual conditions. It solves the problem that the boundary conditions in the CPT static penetration test in the laboratory do not match the actual situation, and can ensure that the indoor test is consistent with the field. The actual test is consistent

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