Soil one-dimensional consolidation, penetration and stress looseness comprehensive test apparatus and method of use thereof

Abstract

The invention discloses a soil one-dimensional consolidation, penetration, stressing relaxation combined test instrument and usage, which posits punch inside a punch cavity at the bottom of pressure container. It can do consolidation and compression to the same soil sample K0, it also can do soil sample penetration test and stressing relaxation test directly and simultaneously. It can test the soil sample's value of coefficient of static lateral pressure K0 and the process of pore water pressure followed by time. The test instrument and method can arrange soil's consolidation characteristic parameter by test outcome and using theoretical formula penetration method. It can do soil's theological behavior analysis by the outcome of stressing relaxation test.

Description

technical field [0001] The invention belongs to the field of civil engineering, in particular to a soil K 0 (One-dimensional) Consolidation, penetration, stress relaxation comprehensive test equipment and its application method. Background technique [0002] As far as the present is concerned, although the conventional consolidation or compression test is simple and has mature experience in use, its results can meet the general requirements, and it is still widely used as the main test method. However, conventional consolidation or compression tests cannot directly test the static lateral pressure coefficient K of the deformation process of soil samples. 0 , especially after loading, the static lateral pressure coefficient K of the soil sample during deformation 0 It is constantly changing and cannot be reflected in conventional one-dimensional consolidation or compression tests. On the other hand, the disadvantage of the conventional soil sample consolidation test is tha...

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Problems solved by technology

The reason why the soil consolidation coefficient does not use the theoretical formula parameter method is that the soil permeability coefficient cannot be measured accurately by conventional methods. The reason for the inaccuracy is that the penetration test is out of touch with the consolidation test, that is, the soil solid process cannot be simulated in the conventional penetration test. The stress and density state in

The application of soil consolidation theory is greatly limited due to the influence of the reliability lag of the consolidation coefficient test method and test results.

[0003] In addition, the conventional test method adopts the method of loading in stages, which takes a long time and is often not suitable for practical engineering applications; especially at the moment of loading, due to the large gradient of pore water pressure, the natural structure of the soil may be destroyed

[0004] At home and abroad, relevant researches have been carried out on the shortcomings of conventional one-dimensional consolidation or compression test methods, and some progress has been made. However, only a single consolidation or compression test can be performed on a soil sample, and soil samples cannot be tested simultaneously. The test of static lateral pressure coefficient, pore water pressure, permeability coefficient and rheology of soil samples

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