Closure building on wide and deep soft foundation river

Abstract

The invention relates to a building which is located on a wide and deep soft foundation river and used for closure. According to the building, a bottom protection concrete slab is built on a riverbed, comb tooth piers are built on the bottom protection concrete slab and connected through steel wire ropes, and a stone blocking fence is formed by the comb tooth piers and the steel wire ropes together. The building has the advantages that the bottom protection concrete slab is built on the riverbed, so that scour damage to a riverbed soft foundation caused by high-speed water flows on a closure gap is reduced; the comb tooth piers are built on the bottom protection concrete slab, so that the diameter of special material used in river closure construction and material losses are reduced, tossing strength and difficulty of the closure construction are reduced, and meanwhile the comb tooth overflowing flow state is used for forming banked-up water rapidly in front of a gate to create good flow division conditions. If necessary, comb tooth protection bottom can be effectively combined with a cofferdam impermeable system to save construction cost and shorten a construction period, and the problems that large-fall high-flow deep soft foundation riverbed closure construction is difficult to organize, long in construction time and high in construction cost are solved.

Description

technical field [0001] The invention relates to a structure for intercepting rivers on open, deep and soft foundation rivers, especially a building for efficient interception construction on open plain rivers. Background technique [0002] In the construction of water conservancy and hydropower projects, the closure project is a key project of water flow control in water conservancy projects, and its safe and effective control has always been concerned. In order to fully develop and utilize water conservancy and hydropower resources, more and more water conservancy projects are built on deep and soft riverbeds, especially the final stage hydropower stations developed by river cascades are mostly built in open plain river areas, and the riverbeds are mostly deep and soft. layer, the discharge flow of the river is mainly affected by the discharge flow of the upstream power station. The interception construction in this case has the characteristics of large gap, high flow velo...

AI Technical Summary

Problems solved by technology

The interception construction in this case has the characteristics of large gap, high flow velocity, and high construction intensity, which makes the interception construction have problems such as large loss of intercepted materials, large size of special materials, and difficult selection of construction machinery. Construction experience and theory are not enough to completely solve new problems arising from closure works on rivers with deep soft foundations

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