Gas-containing soil consolidation test device and test method

Abstract

The invention provides a gas-containing soil consolidation test device and a test method. The gas-containing soil consolidation test device comprises a support, a pressure barrel, a piston, a top cap,a perforated plate, a guiding rod, a displacement sensor, a total stress sensor, a steam measurement device, a measurement device for pore water pressure of the upper surface and the lower surface ofa soil sample to be tested, a water inlet and a guiding pipe, wherein the pressure barrel is fixed to the support, the piston is arranged in the pressure barrel, the guiding rod is arranged at the bottom of the piston, the displacement sensor is arranged at the bottom of the support and connected with the guiding rod, the top cap and the perforated plate are arranged on a consolidation chamber from top to bottom, the total stress sensor is arranged on the upper surface of the piston, the steam measurement device is arranged on the top cap, the water inlet is arranged on the pressure barrel, the guiding pipe is arranged on the piston, the water inlet is communicated with a pressure chamber and is externally connected with external pressurizing equipment, and the measurement device for porewater pressure of the upper surface and the lower surface of a soil sample to be tested is respectively communicated with the upper surface and the lower surface of the soil sample to be tested. Thegas-containing soil consolidation test device disclosed by the invention can be suitable for gas-containing soil, can perform moisture separation in a gas sealing and consolidation process and achieves independent measurement.

Description

technical field [0001] The invention belongs to the technical field of soil property index testing in geotechnical tests, and relates to a consolidation test device and a test method, in particular to a consolidation test device and a test method of air-containing soil. Background technique [0002] Air-bearing soils rich in shallow gas and in the form of free bubbles generally have the characteristics of high water content, dissolved and saturated gas phase, gas pressure higher than atmospheric pressure, small permeability coefficient, and a metastable equilibrium state. In the field of geotechnical engineering, little is known about this kind of air-bearing soil with special properties and engineering properties that are different from ordinary saturated and unsaturated soils. One of the main difficulties lies in the lack of dedicated test equipment. [0003] The conventional geotechnical consolidation instrument can only measure the consolidation deformation characteristi...

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Problems solved by technology

[0004] In order to solve the above-mentioned technical problems in the background technology, the present invention provides a method that can overcome the fact that the existing geotechnical consolidation device is not suitable for air-bearing soil, cannot perform gas sealing and water-gas separation in the consolidation process, and can be independently measured The current situation, so as to realize the high-precision consolidation test of air-bearing soil Consolidation test device and test method of air-bearing soil

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