An instrument for measuring stress penetration of unsaturated rock and soil materials

Abstract

The invention discloses a stress infiltration measuring instrument for unsaturated rock and soil materials. The data acquisition system is respectively connected with a servo loading pump, a mass sensor, a temperature and humidity sensor and a strain gauge. The mass sensor is placed outside a closed container, and the mass sensor is connected with a connecting hook. , the other end of the connecting hook passes through the small hole on the airtight container to connect with the upper stress pad of the loading platform, the lower pressure pad of the loading platform is connected to the outlet of the servo loading pump, and the outlet of the servo loading pump passes through the hole on the airtight container The small hole is connected with the servo pressure pump, the servo pressure pump is placed outside the airtight container, the strain gauge and the temperature and humidity sensor pass through the small hole on the airtight container respectively, and the vessel containing the saturated saline solution is placed in the airtight container. Simple structure, easy to use, complete functions, high measurement accuracy, realize deformation and mass tracking measurement of unsaturated drying and wet process at different stress levels, and realize the determination of material mechanical parameters under different saturation, very suitable for unsaturated soil mechanics research.

Description

technical field [0001] The invention relates to the technical field of experimental measuring instruments, and more specifically relates to an unsaturated rock-soil material stress penetration measuring instrument, which provides a synchronous and accurate measuring device for determining parameters such as deformation, mechanics, and permeability of unsaturated rock-soil media. Background technique [0002] The problem of unsaturation is one of the important issues in geotechnical engineering. Many geotechnical engineering disasters are closely related to the unsaturated characteristics of materials. Due to seasonal and periodic changes in humidity, a large number of cracks are produced in the surrounding rock, which weakens the mechanical and hydraulic properties and poses a danger to engineering safety. At present, the development of unsaturated soil mechanics testing technology is slower than that of saturated soil mechanics. [0003] Unsaturated soil mechanics testing ...

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Problems solved by technology

[0007] However, there is currently no unsaturated geotechnical material stress-permeability measuring instrument retrieved in the existing literature, which simultaneously performs unsaturated infiltration measurement and moisture tracking measurement equipment under different stress conditions

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