Structure and method for protecting slope of drainage groove network chain of barrier lake

Abstract

The invention discloses a structure and a method for protecting a slope of a drainage groove network chain of a barrier lake. The structure comprises an initial drainage groove side slope (8), an initial drainage groove bottom slope (9), a collapsed drainage groove side slope (10) and a barrier body dam crest (11), wherein after a barrier body is collapsed, one end of a wedge-shaped network chain (6) is connected with an anchoring structure (3) through a chain (4), and the other end of the wedge-shaped network chain (6) is connected with a steel bar gabion submerged counterweight (7) through the chain (4); and the steel bar gabion submerged counterweight (7) and the wedge-shaped network chain (6) are positioned in a collapsed drainage groove (2) of the barrier body. The structure overcomes the defects that overtopping and collapsing flood is certainly formed and the damage capability is extremely high when the barrier lake freely develops in the prior art, and has the advantage of greatly shortening the construction time of drainage groove protection on a barrier lake construction site with traffic jam.

Description

technical field [0001] The invention relates to the technical field of barrier lake risk disposal in the emergency rescue field of water conservancy projects, and more specifically relates to a barrier lake drainage trough net chain slope protection structure and method. Background technique [0002] As a major natural disaster, a barrier lake refers to a natural lake formed by valley collapse, landslide or even debris flow due to the dynamic geological action of the bank slope under certain topographical conditions. The corresponding accumulations that block the river are called weirs. plug body. [0003] Affected by many factors such as earthquakes and rainfall, the alpine and canyon areas in Southwest my country frequently suffer from frequent disasters of barrier lakes. This area usually has harsh natural environments, inconvenient transportation, and lack of basic hydrogeological data. However, the barrier lake itself has a strong water storage capacity and a relativel...

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Problems solved by technology

[0006] However, the current engineering measures can only realize the early flow of the barrier lake, and when the discharge flow in the drainage channel increases to a certain scale, the vertical downcut and horizontal expansion erosion develop rapidly, forming a burst flood that is difficult to control, seriously threatening the lives and property of people downstream Safety

[0007] In order to prevent the dam body from collapsing and destabilizing too quickly, protective measures such as giant steel gabions and boulder locks are mainly used at present. At the lake emergency treatment site, there are common problems such as cumbersome installation process and extremely inconvenient transportation and transfer. Moreover, in the initial stage of the collapse process, the discharge flow in the drainage tank is small, and the gabion and other structures touch the discharge flow prematurely, hindering normal flushing and cutting. It is extremely unfavorable to reduce the upstream storage capacity

In addition, with the continuous development of the collapse process, the drainage channel of the barrier lake gradually collapses and deforms, and the structural form of the bottom canal and slope continues to change dynamically. It is basically difficult for traditional protection measures to dynamically adjust their own structural form and adapt to the erosion and deformation of the drainage channel, making it difficult to continuously protect Drainage tank slope, delayed drainage tank collapse, collapse control and peak cutting effect is greatly weakened

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