Indoor measuring device for friction between soil mass and structure and use method of measuring device

Abstract

The invention relates to a measuring device for friction between a soil mass and works and a use method of the measuring device. The measuring device comprises a main frame, a soil sample chamber, a shearing mechanism and a loading mechanism, wherein the soil sample chamber, the shearing mechanism and the loading mechanism are arranged in the main frame; an operating table is mounted at the middle part of the main frame, the soil sample chamber is placed on the operating table, the bottom of the soil sample chamber is sealed through a piston, the shearing mechanism is mounted at the top of a side upright rod, the bottom of the shearing mechanism is connected with a force transfer lever, a torque sensor is arranged between the force transfer lever and the shearing mechanism, a metallic disc is fixed at the bottom of the force transfer lever and enters the soil mass in the soil sample chamber, the loading mechanism comprises a lifting stepping motor, an output shaft of the lifting stepping motor is connected to the piston through a connecting member, a weighing sensor is arranged between the piston and the connecting member, and the weighing sensor and the torque sensor are used for separately acquiring a normal force applied to the soil mass and the shearing force of a surface, in contact with the metallic disc, of the soil mass in a testing process, so as to calculate a load borne by the soil mass, the friction between the soil mass and the metallic disc and a corresponding relationship between the soil mass and the metallic disc.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering measurement, in particular to an indoor measuring device for friction between a soil body and a structure and a method for using the same. Background technique [0002] In recent years, with the construction of large-scale infrastructure projects such as energy mining, nuclear waste treatment, water conservancy projects, and utilization of underground space, the determination of the contact friction between rock and soil and building structures has attracted increasing attention. In geotechnical engineering such as water conservancy and hydropower, tunnels, slope reinforcement, and foundation pit excavation, the accurate determination of the contact friction force between rock and soil mass and building structures has an important impact on the evaluation of rock mass engineering stability. As a continuum material, the mechanical properties of rock and soil can be studied and prov...

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Problems solved by technology

[0003] At present, most of the tests in the industry use electric cross-plate shear instruments, mainly for soil shear strength testing. However, in engineering construction, more attention is paid to the friction strength between soil and structural surfaces. At present, there is no specific test for soil in the existing technology. Test device for testing the friction force with the foundation surface of the structure

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