Structure and method for controlling dam break flood peak flow of barrier dam

Abstract

The invention discloses a structure and method for controlling dam break flood peak flow of a barrier dam, belongs to the field of disaster prevention and reduction engineering, and provides a structure and method capable of effectively controlling the dam break flood peak flow of the barrier dam. According to the structure for controlling the dam break flood peak flow of the barrier dam, steel pipe piles are arranged on the positions, on the two sides of a drainage channel, of the lower middle portion of the barrier dam respectively, the steel pipe piles on each side are closely arranged on the outer sides of side bank slope lines corresponding to side banks of the corresponding drainage channel in the state of flood peak flow in the period from dam break to 20 years, and the inner ends of the steel pipe piles at least penetrate into the positions 10m below side bank slope lines corresponding to the side banks of the corresponding drainage channel in the state of flood peak flow in the period from dam break to 20 years. According to the structure and method, erosion expansion speed of the two banks of the drainage channel can be decreased through erosion resistance of steel pipe pile protection slopes on the two sides, protective cement paste reinforcement stone cages on the two sides and outlet impact-resistant cement paste reinforcement stone cages, so that the dam break time of the barrier dam is delayed, the maximum flood peak flow of dam break is effectively reduced, and the purposes of disaster prevention and reduction are achieved.

Description

technical field [0001] The invention relates to the field of disaster prevention and mitigation engineering, in particular to a structure and method for controlling the peak flow of a dam break when a dam breaks. Background technique [0002] In recent years, my country's and the world's geological structures have been relatively active, and extreme disasters such as heavy rains and strong earthquakes have occurred frequently, resulting in frequent landslides and the formation of barrier lakes, especially in the mountainous areas of southwest my country. In the past 10 years, there have been more than ten typical landslides blocking rivers in Southwest my country. For example, from October 11 to November 3, 2018, four large-scale landslides occurred in Baige on the Jinsha River and Milin on the Yarlung Zangbo River in the Tibet Autonomous Region. Large-scale landslides and glacial debris flows blocked the main streams of the Jinsha River and the Yarlung Zangbo River respectiv...

AI Technical Summary

Problems solved by technology

At present, some people propose to add anti-scouring structures directly in the discharge channel, and some people propose to put artificial structures in the later stage of the discharge of the barrier lake. These two methods have certain problems: the former will cause no erosion in the initial stage of discharge. , the drainage efficiency is low, and the water level of the barrier lake will rise rapidly, which cannot effectively reduce the disaster and safety risks of the barrier lake; the latter is put into an artificial structure in the later stage of water release, and the collapse will develop rapidly at this time, which will pose a threat to the construction workers. The safety threat is huge, and at the same time, a large number of large-scale artificial structures need to be invested in a short period of time to achieve the effect, which is often difficult to achieve, that is, it is not implementable, and the side slope protection is limited

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