Device and method for measuring lateral stress and strain during movement of loose particles

Abstract

The invention belongs to the technical field of engineering applied mechanics, and particularly relates to a device and a method for measuring lateral stress and strain during movement of loose particles. The device for measuring the lateral stress and strain during movement of the loose particles comprises a support, a circulation chute, a rigid stop plate, a fixing device and earth pressure sensors; the circulation chute comprises two side surfaces and a bottom surface, the circulation chute is mounted on the support, and an included angle is arranged between the circulation chute and the horizontal plane; the rigid strop plate comprises a vertical plate and a bottom plate, and the vertical plate is vertically disposed in the middle of the bottom plate; the rigid stop plate is placed onthe bottom surface of the circulation chute, and the fixing device is used for positioning the rigid stop plate on the circulation chute; the earth pressure sensors are arranged on the side surfaces of the circulation chute and the vertical plate of the rigid stop plate. The device and the method are used for simulating the movement process of the loose particles and measuring the lateral stress and strain during movement of the loose particles.

Description

technical field [0001] The invention belongs to the technical field of engineering applied mechanics, and in particular relates to a device and method for measuring lateral stress and strain during the movement of loose particles. Background technique [0002] Debris flow is a common geological disaster with strong destructive ability, which usually poses a serious threat to people's life and property safety when it occurs. Debris flow is a geological phenomenon of loose particle movement. At present, in the numerical simulation of loose particle movement, the most widely used theoretical model is the depth-averaged continuous theoretical model. However, in the continuous theoretical model of depth averaging, due to the assumption of depth averaging, the lateral stress can only be obtained by multiplying the lateral stress coefficient by the bottom stress, and it is an average value, but the lateral stress along the depth direction cannot be obtained. Therefore, it is impos...

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Problems solved by technology

However, in the continuous theoretical model of depth averaging, due to the assumption of depth averaging, the lateral stress can only be obtained by multiplying the lateral stress coefficient by the bottom stress, and it is an average value, but the lateral stress along the depth direction cannot be obtained. Therefore, it is impossible to obtain the detailed distribution of various stresses during the movement of loose particles more accurately.

At the same time, due to the imperfection of the constitutive model of loose particles, the qualitative and quantitative research on the relationship between stress and strain during the movement of loose particles is limited.

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