Water cushion slope-shifting height adjustable counterweight dam

Abstract

The invention discloses a water pillow slope moving type heightening adjustable balance weight dam which comprises a base dam body and a moving dam. The base dam body comprises an upstream slope and adownstream slope which correspond to each other; and the moving dam is placed on the upstream slope, the bottom of the moving dam is hollow to form a water pillow containing cavity with an opening, debris flow enters the water pillow containing cavity from an opening of the water pillow containing cavity, and a supporting protrusion is arranged at the back end of the bottom of the moving dam. Thefront end of the bottom of the moving dam is heightened through impact of the debris flow, and the moving dam moves on the upstream slope under assistance of the supporting protrusion. Large space isavoided by upward moving heightening and retreating of the moving dam for containing the debris flow.

Description

technical field [0001] The invention belongs to the technical field of debris flow safety protection, and in particular relates to a water cushion slope-shifting height adjustable counterweight dam. Background technique [0002] The dynamic pressure of mud-rock fluid slurry and the impact force of rocks are typical impact loads, which are characterized by a short action time (mostly measured in milliseconds, microseconds or even nanoseconds), but will generate extremely high pressure, eventually causing the medium Movement, material failure, and failure of entire structures. At present, the main means of preventing debris flow is to build debris flow retaining dams, adopt gravity retaining walls to completely block debris flows, and add diversion channels on the basis of the retaining dams to buffer the impact of debris flows. [0003] However, during the movement of debris flow, a large number of stones and trees are mixed, which can easily block the diversion channels of ...

AI Technical Summary

Problems solved by technology

[0003] However, the debris flow is mixed with a large number of stones and trees during its movement, which can easily block the diversion channels of conventional debris flow dams, etc., resulting in the accumulation of debris flow

Under complex geological environment conditions, the gravity retaining wall bears special and changeable loads. Once the dam collapses during the debris flow outbreak, it will not only fail to achieve the expected prevention and control effect, but also the dam body and the solid materials it blocks will also be damaged. It will become the source of loose solid matter for debris flow, directly participate in the movement of debris flow, increase the flow and destructiveness of debris flow, and may even cause more unexpected disaster losses

[0004] Due to the sudden occurrence of debris flow and the certainty of the level of debris flow, it is difficult for a single method of prevention and control of debris flow to meet the different levels of debris flow prevention and control.

If a large and stable retaining dam is built, it can effectively solve the problem of block impact damage of traditional retaining dams to a large extent, but the construction requirements are high, the construction is difficult and the cost is doubled, and large-scale construction cannot be achieved.

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