Saturated permeability coefficient testing system and method capable of simulating wet-dry cycle effect of sock-soil body

Abstract

The invention discloses a saturated permeability coefficient testing system and method capable of simulating the wet-dry cycle effect of a sock-soil body. The system comprises a non-gas water preparation system, a pressure control system, a flexible wall permeameter and a drying system, wherein a non-gas water pipeline in the non-gas water preparation system and an air pressure pipeline in the pressure control system are switched in a pressure chamber and an elastic bag of an air / water pressure conversion device respectively; the pressure control system is connected with a permeability pressure chamber through the water pressure pipeline, and is used for regulating and controlling confining pressure, back pressure and water head pressure of the pressure chamber entering into the permeameter through the air / water pressure conversion device; and the permeability pressure chamber is switched in the drying system through a control valve. The system is simple and convenient in operation, elaborate to control, accurate in measurement and high in practicability, can provide new technical support for researching the wet-dry cycle permeability of the sock-soil body, and simultaneously can be used for teaching jobs.

Description

Technical field: [0001] The invention relates to a retaining wall test device, in particular to a saturated permeability coefficient test system and method capable of simulating dry and wet cycles of rock and soil. Background technique: [0002] In the field of geotechnical engineering, the soil is in the natural state due to rain, evaporation or groundwater level rise and fall, and it is in a saturated-dry alternate cycle state for a long time. Under the action of multiple dry and wet cycles, the soil particles are arranged, The pore characteristics and soil structure have changed. As a result, the engineering properties of the soil have also changed, such as shear strength and saturated permeability coefficient. [0003] Traditional indoor methods for measuring saturated permeability coefficient generally include constant head and variable head methods. The constant head method is suitable for soils with large permeability coefficients, such as sandy soils, while the variable he...

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Problems solved by technology

However, none of the above methods can directly measure the saturated permeability coefficient under the action of dry-wet cycles.

[0004] In the existing dry-wet cycle saturated permeability coefficient test, it is necessary to continuously disassemble and assemble the sample, saturate or dry the sample, and then repeat the permeability coefficient test. affect the accuracy of test results

[0005] Therefore, in the prior art, there is no simple device that can directly measure the permeability coefficient of the sample during the dry-wet cycle.

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