In-situ measurement method for shear strength of soil body and automatic remote real-time measurement system thereof

Abstract

The invention discloses an in-situ measurement method for the shear strength of a soil body and an automatic remote real-time measurement system thereof. The in-situ measurement method comprises the steps of obtaining a shear wave velocity through a pair of shear wave velocity measurement piezoelectric patches according to a piezoelectric effect; measuring the moisture content of the soil body through a soil body moisture content sensor; obtaining the shear strength of the soil body according to a relation among the shear wave velocity, the moisture content of the soil body and the shear strength of the soil body. Exciting and receiving signals of the pair of the shear wave velocity measurement piezoelectric patches are connected with a micro controller through a phase discriminator and then are sent to an upper computer through a remote signal sending circuit and a remote signal receiving circuit; all devices are powered by a storage battery; the storage battery is connected with a solar power supply device. The shear strength of the soil body is measured according to the shear wave velocity of the soil body and the moisture content of the soil body; in-situ, remote, real-time and automatic measurement is executed; an on-site, real-time and remote monitoring means is supplied to observation of possible catastrophe processes of landslide and debris flow hidden points, research on the rule of the landslide and debris flow disasters and final forecast of the landslide and debris flow disasters.

Description

technical field [0001] The invention relates to a measurement method and a measurement system in soil, in particular to an in-situ measurement method of soil shear strength and a remote real-time automatic measurement system thereof in the technical field of geotechnical disaster prevention engineering. Background technique [0002] The harm of landslides and debris flows to human social development and economic construction is worldwide, and the shear strength of soil is an important physical performance index of rock and soil, which depends on the internal cohesion and internal friction of the soil. It is one of the important parameters to reflect whether disasters may occur at hidden landslides and debris flow hazards. Combining topography and other factors to analyze the soil shear strength of landslides and debris flow hazards hidden dangers can realize the prediction of landslides and debris flow disasters. To realize the forecast, it is necessary to automatically meas...

AI Technical Summary

Problems solved by technology

The first three measurement methods are carried out by taking soil samples back to the laboratory, and the last cross-shear measurement is completed on site by people operating corresponding equipment. It can be seen that these measurement methods cannot be realized on-site at landslides and debris flow hazards. Human, automatic, long-term, in-situ, real-time, remote measurements

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