Triaxial consolidation test-based method for confirming relationship between soil body permeability coefficient and void ratio

Abstract

The invention discloses a triaxial consolidation test-based method for confirming a relationship between a soil body permeability coefficient and a void ratio. The method comprises the following steps: firstly, acquiring a test soil sample, and acquiring an initial void ratio e0 of the soil sample by tests; secondly, preparing a test sample, and carrying out saturation treatment on the prepared test sample; then, carrying out a classification pressure-reduction seepage triaxial consolidation test on the test sample, and recording the pore pressure value and the volume variation value of the test sample in the testing process; then, treating recorded testing data, and calculating the permeability coefficient and the void ratio in the classification pressure-reduction process; and finally, confirming the relationship between the soil body permeability coefficient and the void ratio. According to the invention, a triaxial consolidometer is adopted for carrying out classification pressure-reduction seepage testing on the soil body test sample, and the permeability coefficient and the void ratio in a classification pressure-reduction test each time are calculated according to the pore pressure value and the volume variation value in the testing process, and finally the relationship between the soil body permeability coefficient and the void ratio is confirmed. The method is simple in principle, is convenient to operate, is accurate and reliable, and can rapidly determine the variation rule of the permeability coefficient.

Description

technical field [0001] The invention relates to the field of civil engineering, in particular to a method for determining the relationship between soil permeability coefficient and void ratio based on a triaxial consolidation test. Background technique [0002] Soil permeability refers to the property of how easily water flows through the pores in the soil. The permeability coefficient is an important physical index to measure the permeability of soil. It is a necessary basic parameter in the analysis and calculation of soil seepage, consolidation, precipitation, etc., including foundation settlement calculation considering consolidation, seepage analysis of dams and foundation Precipitation calculations, etc. [0003] At present, the testing methods for permeability coefficient usually include constant water head method, variable water head method and pore pressure static penetration detection permeability coefficient method, etc. "Standards for Geotechnical Test Methods"...

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Problems solved by technology

However, none of the above literatures clearly pointed out the method used to test the change of permeability coefficient, so it is particularly important to propose a method that can quickly determine the change law of permeability coefficient and obtain the data of the entire change process for comprehensive measurement

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