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Flow-passing-type debris flow blocking dam and dam group

A mud-rock flow and flow-through technology, which is applied in dams, water conservancy projects, sea area projects, etc., can solve the problems of failure of mud-rock flow accumulation pressure and the failure of retaining dams, etc., and achieve the effect of structural safety and convenient dredging

Inactive Publication Date: 2017-08-11
LANZHOU UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a flow-through debris flow retaining dam and dam group, which solves the problem of failure of storage and adjustment functions after the effective storage capacity in the retaining dam is silted up, and the debris flow that the effective storage capacity in the retaining dam is silted up with mud and sand. The accumulation pressure is high, and the retaining dam is prone to collapse

Method used

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  • Flow-passing-type debris flow blocking dam and dam group
  • Flow-passing-type debris flow blocking dam and dam group

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Embodiment Construction

[0015] The present invention will be described in detail below in combination with specific embodiments.

[0016] Such as figure 1 As shown, the over-flow debris flow retaining dam is composed of a main dam body, an overflow weir, and a discharge tunnel. The overflow weir is located above the main dam body, and several discharge tunnels are arranged at the bottom of the main dam body. , The discharge tunnel flow should meet the following conditions:

[0017] 1. The overflow capacity of the overflow weir and discharge tunnel meets the maximum flow rate of debris flow for the safety of the retaining dam;

[0018] Q 溢 +∑Q 泄 ≥Q max ;

[0019] 2. The discharge flow of the discharge tunnel should be less than the maximum discharge safety flow to ensure the safety of the downstream protection zone;

[0020] ΣQ 泄 ≤Q S ;

[0021] The minimum width of the discharge hole can ensure the maximum particle size of stones in the flow in the ditch and the passage of dredging vehicles ...

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Abstract

The invention discloses a flow-passing-type debris flow blocking dam and a dam group. The flow-passing-type debris flow blocking dam and the dam group which is composed of a plurality of flow-passing-type debris flow blocking dams are included. The flow-passing-type debris flow blocking dam is composed of a main dam body, an overflow weir and a plurality of draining holes. The overflow weir is located above the main dam body, and the multiple draining holes are formed in the bottom of the main dam body. The flow of the overflow weir and the flow of the draining holes should meet the following conditions that the discharge capacity of the overflow weir and the draining holes satisfies the requirement of the maximum flow rate of debris flow capable of guaranteeing safety of the blocking dam, the let-down flow rate of the draining holes is smaller than the maximum let-down safety flow rate capable of guaranteeing safety of a downstream protective area, the minimum width of the draining holes can ensure that stone with the maximum stone particle size in channel passing flow, desilting vehicles and equipment pass through, and the total storage capacity of the blocking dam and the dam group can effectively block the maximum total rush-out amount of the debris flow under the fortification standard. The flow-passing-type debris flow blocking dam and the dam group have the beneficial effects that the structure is safe, desilting is convenient, the retaining storage capacity can be used repeatedly, and the effects of preventing disasters and reducing damages are obvious.

Description

technical field [0001] The invention belongs to the technical field of prevention and control of geological disasters, and relates to a flow-through debris flow retaining dam and a group of dams. Background technique [0002] At present, the role of debris flow retaining dams is generally to block, and its purpose is mainly to hold water and sediment, change the conditions of water and sediment delivery, adjust the discharge of water and sediment, and stabilize slopes and valleys. When the effective storage capacity in the retaining dam is filled with mud and sand, the retaining and regulating functions will be lost, and the disaster prevention and mitigation functions will be greatly weakened. [0003] After the effective storage capacity in the retaining dam is filled with mud and sand, a large amount of solid loose matter is stored in the ditch, and the pressure of the debris flow accumulation on the retaining dam is high. Once the retaining dam collapses, the solid loose...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B7/04E02B8/06
CPCE02B7/04E02B8/06
Inventor 魏万鸿叶伟林孟兴民宿星杨涛刘兴荣冯乐涛王得楷吴玮江周自强
Owner LANZHOU UNIVERSITY
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