Multifunctional test device for researching seepage failure mechanism of underground engineering soil body

Abstract

The invention, which relates to the technical field of seepage test equipment, discloses a multifunctional test device for researching a seepage failure mechanism of an underground engineering soil body. The device comprises a main box body, a loading system, a pipeline simulation system, an adjusting system, a foundation pit supporting mechanism, a measuring system and a test system. The main boxbody is used for bearing a soil body; the loading system is used for applying a load to a soil body; the pipeline simulation system is used for simulating a pipe jacking pipeline.; the adjusting system is used for providing water for a soil body and controlling the water pressure; the foundation pit supporting mechanism is used for simulating foundation pit supporting; the measuring system is used for detecting the pressure in the loading system and observing the movement and change conditions of the soil body, and the measuring system is used for measuring the particle size and quantity of outflow sand. The invention provides a model device for researching a seepage failure mechanism caused by underground water, and the indoor model test device is used for simulating soil body stress deformation, pore water pressure change conditions and the like under the action of underground water, so that the foundation pit failure caused by underground water seepage can be better eliminated.

Description

technical field [0001] The invention relates to the technical field of seepage test equipment, in particular to a multifunctional test device for studying the seepage damage mechanism of underground engineering soil. Background technique [0002] The construction of coastal cities is developing rapidly, and the number of deep foundation pits is increasing day by day. The foundation pits near the sea are particularly rich in groundwater resources, and there is a certain degree of hydraulic connection between groundwater and seawater. Compared with ordinary foundation pits, the groundwater problems in seaside foundation pits are more complicated. For example, there is a greater possibility of piping at the bottom of foundation pits. Pipe jacking is used in the non-excavation laying of urban underground water supply and drainage pipelines in coastal economically developed areas. The pipe jacking pit is essentially a small square foundation pit. Interaction with soil disturbanc...

AI Technical Summary

Problems solved by technology

[0005] In summary, although such accidents are often reported, there are relatively few studies on the damage precursors and processes of piping, foundation pit inrush, and local corrosion of pipelines caused by seepage under the action of groundwater.

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