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

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...

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 will cause blockage of the main river and produce weirs The secondary disaster of the lake; but for how to realize the reasonable configuration of engineering measures, such as how to distribute the debris flow reasonably and efficiently between the drainage channel and the parking lot, it is necessary to further develop the corresponding engineering structure to realize

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