Model test device for the development process of sand piping damage in embankment engineering

Abstract

The invention discloses a model experimental device for piping damage development process of embankment project sandy soil, belonging to the field of physical model experiments of water conservancy projects. The model experimental device comprises three parts, namely a box-shaped experimental instrument, a varying head water supply device and a data acquisition device. The model experimental device can be used for simulating the seepage field change caused by seepage deformation until damage of the dyke-based sandy soil in the embankment project and erosion deformation of the sandy soil and representing the forming and developing process of piping damage of dyke-based sandy soil in the embankment project more reasonably. By adjusting types of an experimental soil sample, the piping damagephenomena of various dyke bases in the embankment project such as uniform dyke base, a dual-layer dyke base, a multilayer dyke base and the like can be simulated; and by adopting a mode of gradually increasing the water head and changing the position (the length of a seepage path) of a piping port, the piping damage and development processes under various hydraulic conditions in embankments of rivers can be simulated. The model experimental device is applicable to scientific research on piping damage relevant to embankment projects, provides guidance for design of actual embankment projects or can be used for teaching experiments of water conservancy project and gotechnical engineering disciplines.

Description

technical field [0001] The invention relates to a model test device for the development process of sand pipe gushing failure in embankment engineering, which belongs to the field of physical model tests of hydraulic engineering, and relates to hydraulic model test equipment, in particular to a model test device for the development process of sand pipe gushing damage in embankment engineering. Background technique [0002] The phenomenon that the ground downstream of the embankment is penetrated by the seepage of groundwater under pressure in the basement is called pipe gushing. After sand gushes out of the outlet, the seepage flows upstream and develops to erode upstream along the embankment foundation. When the passage reaches the upstream, it will also A vortex occurs on the surface of the river, and the embankment will sink or crack and cause the embankment to break. A large number of flood disaster data show that embankment foundation piping has the highest occurrence ra...

AI Technical Summary

Problems solved by technology

However, the previous model test methods for piping failure of embankment foundations cannot simulate the development process of piping, or cannot test the dynamic changes of the seepage field during the piping process, but can only obtain critical slope parameters, and cannot describe the development process of piping damage in detail

It is difficult to reproduce the real process of the formation and development of piping damage, so it cannot meet the needs of research on piping damage in embankment engineering

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