Dam with pile groups and permeable frame and construction method of dam

Abstract

The invention discloses a dam with pile groups and a permeable frame and a construction method of the dam. The construction method includes: piling vertical dam piles in a to-be-constructed river, arranging a mesh between each two adjacent vertical dam piles so that the vertical dam piles and the meshes form a closed block, casting the permeable frame in the mashes to form a permeable frame unit, and casting other permeable frames into the meshes so that the permeable frame units form the dam with the pile groups and the permeable frames. The dam has the advantages of stability in structure, long engineering life cycle, eco-environment protection, convenience in construction and the like.

Description

technical field [0001] The invention relates to the technical field of waterway regulation, in particular to a pile group permeable frame dam used for dam building in waterway regulation projects, silting promotion in branch channels, and ecological engineering and a construction method thereof. Background technique [0002] Since the mid-1990s, with the opening of the Yangtze River trunk line (especially the middle and lower reaches) waterway regulation project, the Yangtze River waterway has entered a period of rapid development, and the waterway conditions and cargo volume have greatly increased. According to statistics, since 2005 Since then, it has ranked first in the world's inland rivers for seven consecutive years. [0003] At present, most of the river regulation projects in the middle and lower reaches of the Yangtze River use solid spur dikes to restrain water and attack sand, so as to achieve the purpose of regulating shoals. Although the solid spur dike has ach...

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Problems solved by technology

Although the solid spur dike has achieved good engineering results, it has the following disadvantages: ① It consumes more building materials such as stone and wood, and the engineering volume is relatively large; The state changes to circulation, backflow, etc., forming a large constraint on the flow of the river channel, causing an abnormal increase in the flow velocity at the head of the dam, making it difficult to take root in the dam foundation, and it will take years of emergency protection to stabilize; ③The solid spur dam occupies the natural space of the river, restricting The flood capacity of the river channel has been compromised, the water-sediment balance of the beach channel has been destroyed, and the burden on the channel has increased; ④ The solid non-submerged spur dam will cause serious losses once it overflows in case of a major flood, so it is greatly restricted by the flood control standards; ⑤ Mulch , bottom protection and slope protection sometimes require a large amount of sinking and drainage, which seriously damages the ecology of the river bottom

At the same time, it also has the advantages of simple structure, high degree of construction mechanization, safe and reliable operation, adaptability to various flood standards, ecological protection, and low compensation costs. Larger, permeable pile dams are not suitable for application in channel improvement projects on the main line of the Yangtze River

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