A simulation device and test method for short cut-off wall to control the development of embankment piping

Abstract

This application relates to a short anti-seepage simulation device for controlling the development of embankment piping and its test method, which belongs to the field of embankment seepage control, including a sand tank box, an upstream water level control system, and a data acquisition system for monitoring the test process, sand tank There is a first percolation assembly that separates the sand tank box into two parts: the upstream water inlet chamber and the sand sample filling chamber; the top of the sand tank box is closed with a detachable cover plate, which is located in the sand sample filling chamber. There is a piping hole penetrating through the cover plate on the bottom surface, and an anti-seepage short wall is arranged between the first infiltration component and the piping hole, and the anti-seepage short wall is designed with various penetrations and positions; the side plate of the sand tank box , cover are made of colorless transparent material. This application can visually observe the process of formation and development of embankment piping, and can visually observe the process of different control piping development under the condition of different penetrations and positions of anti-seepage short walls, and can compare with no anti-seepage short The piping damage in the case of wall is compared.

Description

technical field [0001] The present application relates to the field of dike foundation seepage control, in particular to a short seepage-proof short wall simulation device for controlling the development of dike foundation piping and a test method thereof. Background technique [0002] Dike foundation piping means that under the action of the difference in water head inside and outside the embankment, seepage inside the embankment penetrates the downstream topsoil layer, and seepage outlets, namely piping outlets, appear. A sand ring is formed at the orifice, and a seepage channel is formed inside the embankment along the contact surface between the embankment sand layer and the bottom of the embankment or the topsoil covering layer of the embankment body. As the water head increases, the channel develops back upstream to form a tubular seepage channel , and transport sand from the channel to the downstream seepage outlet. When a certain water head is reached, the piping ch...

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Problems solved by technology

[0004] The above method only understands the development process of piping through indirect detection, and cannot directly observe the formation and development of embankment damage when the upstream water head changes, and when there is a cut-off wall in the embankment foundation, the cut-off wall cannot be directly observed. Influence on controlling piping damage

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