Debris flow diversion dam capable of automatically distributing drainage quantity and silt stopping quantity and design method of debris flow diversion dam

A technology for automatic distribution and diversion of dams, which is applied in the remediation of dams, rivers, sea area projects, etc.

Active Publication Date: 2013-07-10
INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent proposes that on the basis of maximizing the use of the transport capacity of the main river, through the reasonable distribution of debris flow materials along the course, corresponding engineering measures are adopted to prevent and control debris flow, so as to realize the safe discharge of debris flow and avoid excessive discharge of debris flow that wil

Method used

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  • Debris flow diversion dam capable of automatically distributing drainage quantity and silt stopping quantity and design method of debris flow diversion dam
  • Debris flow diversion dam capable of automatically distributing drainage quantity and silt stopping quantity and design method of debris flow diversion dam
  • Debris flow diversion dam capable of automatically distributing drainage quantity and silt stopping quantity and design method of debris flow diversion dam

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Experimental program
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Embodiment 1

[0027] Such as figure 1 , figure 2 shown. The drainage area of ​​a debris flow ditch is 5.6km 2 , in order to control debris flow disasters, the prevention and control plan of building sand-blocking dams in the ditch, building a silt stop with accumulation fans, and a 4.0m bottom width row channel is adopted. For the 40m wide channel at the top of the accumulation fan, it is proposed to plan a diversion dam to distribute The amount of drainage and silting, the layout of the plane position is as follows: figure 2shown. The debris flow diversion dam that automatically distributes the drainage amount and the silting amount includes a dam body foundation 1 and a dam body body located on the dam body foundation 1; the bottom of the dam body body is provided with a diversion hole 2 connecting the drainage channel, The top of the main body of the dam is provided with a diversion weir 3 connected to the silt stop; The cross-sectional size is determined according to the design f...

Embodiment 2

[0033] Such as figure 1 , figure 2 shown. The same places as in Embodiment 1 will not be repeated, the difference is that the drainage area of ​​a certain debris flow ditch is 16.8km 2 , using the prevention and control plan of building a group of sand dams in the ditch, building a silting field with accumulation fans, and a 6.0m bottom width row of guide channels. It is proposed to plan a diversion dam to distribute the drainage volume and silting volume. The design flow rate Q of the guide groove drainage 84.0m 3 / s, the design flow Q of the parking lot deposit 62.0m 3 / s. The main body of the dam body is made of masonry material.

[0034] In the first step, the average width of the diversion weir 3 is preliminarily set b 2 is 5.0m, and the discharge coefficient m is taken as 0.46 according to the main material of the dam body, according to the formula h 2 = ( Q ...

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Abstract

The invention discloses a debris flow diversion dam capable of automatically distributing drainage quantity and silt stopping quantity and a design method of the debris flow diversion dam. The debris flow diversion dam comprises a dam foundation and a dam body arranged on the dam foundation, diversion holes connected with a drainage channel are arranged at the bottom of the dam body, a diversion weir connected with a slit stopping field is arranged at the top of the dam body and positioned laterally above the diversion holes, the top elevation of the diversion holes is identical with the bottom elevation of the diversion weir, the size of the section of the diversion holes is determined according to the designed flow of the drainage channel, and the size of the section of the diversion weir is determined according to the designed flow of the slit stopping field. Compared with the prior art, the debris flow diversion dam capable of automatically distributing drainage quantity and silt stopping quantity and the design method of the debris flow diversion dam have the advantages that the diversion holes are fully utilized to control flow of debris flow entering the drainage channel, so that the debris flow is reasonably and efficiently distributed to the drainage channel and the slit stopping field, debris flow exceeding a designed standard is prevented from spillover in the drainage channel to threaten protected objects in the downstream, and the debris flow exceeding the designed standard is also prevented from flowing into a main river to form a dammed lake to cause secondary disasters.

Description

technical field [0001] The invention relates to a mud-rock flow prevention technology, in particular to a mud-rock flow diversion dam capable of automatically distributing a drainage volume and a silting volume and a design method thereof. Background technique [0002] Debris flow disaster is one of the main types of geological disasters in my country. On August 8, 2010, a large-scale debris flow broke out in Sanyanyu, Zhouqu County, Gansu Province. The debris flow silted up the county town and blocked the Bailong River to form a barrier lake that flooded nearly half of the county town, causing heavy casualties and property losses; on August 13, 2010 On the 1st, a large-scale mudslide broke out in Wenjiagou, Qingping Township, Mianzhu City, Sichuan Province, blocking the main river, causing more than ten people to die and disappear, and a large number of houses rebuilt after the Wenchuan Earthquake were buried. More and more attention has been paid to secondary disasters ca...

Claims

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Application Information

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IPC IPC(8): E02B7/02
CPCE02B3/02E02B7/04E02B8/023Y02A50/00
Inventor 陈晓清游勇崔鹏陈建刚李昆
Owner INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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