Bottom protecting structure for hydraulic desilting of deep regulation and storage tunnel

Abstract

The invention discloses a bottom protecting structure for hydraulic desilting of a deep regulation and storage tunnel. The bottom protecting structure comprises a bottom protecting body arranged at the bottom of the tunnel, the bottom protecting body extends along the length direction of the tunnel, and the bottom surface of the bottom protecting body is attached to the inner wall surface of the tunnel; the middle of the upper surface of the bottom protecting body is sunken downwards to form a groove used for desilting; and the two side edges of the groove extend upwards in an inclined mode toform guide slopes. By arranging the bottom protecting structure with the inclined slope at the bottom of the deep regulation and storage tunnel, the bottom of the deep regulation and storage tunnel can be prevented from being scoured by water flow and damaged by pressure oscillation, and the water flow and other sediments can be guided to enter the desilting and dredging groove. According to theprinciple of waterway contraction works, sediments at the bottom of the tunnel can be taken away by utilizing hydraulic self-cleaning and flushing functions, so that the sediment deposition speed andthe sediment deposition amount in the tunnel are effectively reduced, the later sludge treatment burden of the deep tunnel is reduced, and manpower, material resources and financial resources for later sediment treatment are saved.

Description

technical field [0001] The invention relates to a municipal deep tunnel engineering structure, in particular to a bottom protection structure used for hydraulic sand discharge and dredging of deep storage tunnels. Background technique [0002] In recent years, due to the impact of extreme weather such as heavy rains and the acceleration of urbanization in my country, many factors have led to frequent urban waterlogging, which has caused huge losses to social development and people's lives and properties. As an important means to deal with the waterlogging problem, the deep tunnel drainage system has gradually been applied in urban drainage planning by virtue of its own advantages. For example, Guangzhou, Shanghai and other cities have carried out the construction of deep tunnel projects. [0003] As an important part of the deep tunnel drainage system, the deep storage tunnel mainly plays the role of storing and transporting combined sewage, rainwater and regulating and stor...

AI Technical Summary

Problems solved by technology

However, in this technology, the bottom of the block is directly attached to the bottom of the main body of the tunnel, and the impact of high-speed and high-energy water flow on the bottom of the deep tunnel is not considered. Self-cleaning occupies the flow area of ​​the deep tunnel section and increases the construction cost; in addition, the section of the groove formed between the two baffles is not smooth enough, which affects the effect of hydraulic self-cleaning

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