Structural cracksoil body seepage test device

Abstract

The invention discloses a structural crack soil body seepage test device. The device comprises an air pressure servo machine, a water tank and a perforated model box which are sequentially connected through a water conveying pipe; the perforated model box is densely filled with a soil body; a soil pressure gauge, a pore water pressure gauge and a bending element are respectively buried at different heights in the soil body; the top of the soil body is sequentially covered with a filter plate and a pressure transmission plate; a pressure sensor and a pressure servo machine which is used for applying pressure downwards are arranged at the top of the pressure transmission plate; an outlet is formed in the edge of one side face of the perforated model box; transparent tempered glass is arranged on one side face adjacent to the outlet; a camera is correspondingly arranged on the outer side of the transparent tempered glass; a laser particle size analyzer is arranged near the outlet; a step-by-step filtering and weighing device is arranged below the outlet and is matched with the laser particle size analyzer, so that a more accurate lost soil particle size distribution rule is obtained.The device is reasonable in structural design and convenient to use, and can realize a soil body seepage erosion process test at a structural fracture under different hydraulic gradients and upper covering pressures.

Description

technical field [0001] The invention relates to the technical field of soil erosion test equipment, in particular to a soil erosion test device at structural cracks. Background technique [0002] Seepage erosion often occurs in the soil around dams or retaining walls of foundation pits, and it is mainly caused by the loss of fine particles in the soil under the action of seepage water flow. The mechanical properties of soil, including strength, stiffness, and gradation, will change to a large extent due to erosion, which will induce serious disasters such as failure or even destruction of geotechnical structures. The evolution of soil mechanical properties in the process of seepage is usually affected by various internal and external factors such as the hydraulic gradient of seepage flow, the effective pressure on the soil body, and particle gradation, and the evolution law is often difficult to predict. [0003] At present, the research on the evolution of soil mechanical ...

AI Technical Summary

Problems solved by technology

The evolution of soil mechanical properties in the process of seepage is usually affected by various internal and external factors such as the hydraulic gradient of seepage flow, the effective pressure of the soil overlying, and particle gradation, and the evolution law is often difficult to predict.

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