Progressive dry-wet cycle test device and use method

Abstract

The invention discloses a progressive wet-dry cycle testing device comprising a water supply container, a soil column system and a gas permeable system. The soil column system is connected with the water supply container, and the gas permeability system is connected with the soil column system. The water supply container includes a water container and a circulating water container which are concentrically arranged, the soil column system includes a base, a bottom layer and a plurality of standard layers which are connected together, and the gas permeability system includes a plurality of gas permeability pipes with gas permeability through-holes, and the plurality of gas permeability pipes are in inserted connection. The invention also discloses a use method of the test device. Through theprogressive dry-wet cycle test device and the use method, the wet and dry cycle method is in conformity with the actual working conditions in engineering practice, the accuracy of test results is improved, soil samples under multiple times of wet and dry cycles and shear strength parameters thereof can be obtained by one soil column test model, and the gas permeability through-holes are arrangedon the walls of the gas permeability pipes and the walls of the standard layers, so that the cycle of the wet-dry cycle is shortened.

Description

technical field [0001] The invention relates to the technical field of soil dry-wet cycle test, in particular to a progressive dry-wet cycle test device and a use method. Background technique [0002] The city walls or roadbeds are exposed to the natural environment after the completion of construction. Under the action of various natural external forces, the soil quality deteriorates and the strength decreases, which in turn affects the long-term stability of the city walls or roadbeds. Among them, the dry-wet cycle is the most significant and prominent. . Therefore, the research on the physical and mechanical properties of soil due to the dry-wet cycle has naturally become the focus of attention in the academic and engineering circles. Current studies all believe that the dry-wet cycle path and the method of dry-wet cycle have great influence on the test results. [0003] The dry-wet cycle method is mainly through the preparation of ring-knife samples or triaxial samples...

AI Technical Summary

Problems solved by technology

However, due to the large volume of the soil column, the long dry-wet cycle period, and the large number of soil columns required by the conventional dry-wet cycle method, its application is seldom.

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