Debris flow control dam for adjusting peak discharge as well as design method and application thereof

A technology of flood peak flow and debris flow, applied in the field of debris flow prevention and control

Active Publication Date: 2013-09-18
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

[0004] The purpose of the present invention is aimed at the lack of measures in the current debris flow prevention and control to ensure that the drainage volume and silting volume after passing through the blocking project do not exceed the design standard, and for the debris flow prevention and control of the lower section of the circulation section that has the condition of building a larger storage capacity flow control dam, provide A debris flow control dam for regulating flood peak flow and i

Method used

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  • Debris flow control dam for adjusting peak discharge as well as design method and application thereof
  • Debris flow control dam for adjusting peak discharge as well as design method and application thereof
  • Debris flow control dam for adjusting peak discharge as well as design method and application thereof

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Embodiment 1

[0029] Such as figure 1 shown. The drainage area of ​​a debris flow ditch is 24.1km 2 , because the lower section of the flow section of the debris flow basin has the condition of building a large storage capacity flow control dam, in order to control the debris flow disaster, a sand control dam group is built in the ditch, and a debris flow control dam and accumulation fan are built in the lower section of the flow section to adjust the flood peak flow. The prevention and control plan of the drainage channel. The debris flow control dam that regulates flood peak flow includes a dam body foundation 1 and a dam body body that is located on the dam body foundation 1; the bottom of the dam body body is provided with a flow control hole 2 for discharging debris flow downstream, and the dam body The top of the main body is provided with an overflow weir 3; the overflow weir 3 is located directly above the flow control hole 2, and there is a height difference between the top surfa...

Embodiment 2

[0036] Such as figure 1 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 6.8km 2 , using the prevention and control scheme of building a group of sand retaining dams in the ditch, building a debris flow control dam in the lower part of the circulation section to adjust the flood peak flow, and building a drainage channel and a silt stop with accumulation fans. The design flow rate Q of the guide groove Drainage 35.0m 3 / s, the design flow Q of the parking lot Deposit 15.0m 3 / s, the maximum peak flow Q of the protective debris flow Max 70.0m 3 / s, the duration T of the debris flow peak flow exceeding the design flow c for 1200s. The main body of the dam body is made of masonry material.

[0037] In the first step, the average width of the overflow weir 3 is preliminarily set b 2 is 5.0m, and the flow coefficient m is taken as 0.46 according to the main material of the dam body...

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Abstract

The invention discloses a debris flow control dam for adjusting peak discharge as well as a design method and application thereof. The debris flow control dam includes a dam foundation and a dam body, wherein a flow control hole used for downstream discharging debris flow is formed in the bottom of the dam body, and a downflow weir is arranged at the top of the dam body; the downflow wire is positioned right above the flow control hole; altitude difference between the top surface of the flow control hole and the bottom surface of the downflow wire exists; sizes of the cross sections of the flow control hole and the downflow wire, and the altitude difference between the top surface of the flow control hole and the bottom surface of the downflow wire are respectively confirmed according to parameters such as the maximum peak discharge of debris flow, downstream designed discharge and diversion quantity, downstream designed silt storage quantity, and duration time of peak discharge of debris flow exceeding the design flow. According to the invention and compared with the prior art, flow process of the debris flow can be adjusted and controlled through fully utilizing the adjusting storage capacity of the flow control dam, the flow of discharged debris flow can be controlled within a designed flow range, the efficiencies of the downstream discharge and diversion project and the silt storage project are given to full play, so that safeguard for the downstream targets of protection is guaranteed, and generation of secondary disaster is avoided.

Description

technical field [0001] The invention relates to a mud-rock flow prevention and control technology, in particular to a mud-rock flow control dam capable of regulating the flood peak flow of mud-rock flow and its design method and application. 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 ...

Claims

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Application Information

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IPC IPC(8): E02B7/02
Inventor 陈晓清游勇陈剑刚邹玉华李昆张钰
Owner INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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