Method for rapid rescue at dike breach in flood season by utilizing geosynthetics for flow intercepting

Abstract

The invention discloses a method for rapid rescue at a dike breach in a flood season by utilizing geosynthetics for flow intercepting. The method comprises the steps that rescue materials are prepared; the dike breach size and the rescue treatment range are determined; the laying sizes of geogrid, geomats and composite geomembrane and the filling amount of geobags are determined; water flow impactforce is estimated; anchoring force is calculated; a crossbeam is erected; the geogrid is laid and fixed; the geomats and the composite geomembrane are laid; and the geobags are filled. According tothe method, the geogrid provides the bearing capacity, and a force-bearing supporting face is provided for follow-up laying of the flexible geomats and the composite geomembrane. Water flow distribution at the dike breach can be further homogenized by the geogrid, the flow rate of water flows at the dike breach can be effectively decreased through the geomats, the water passing amount is further controlled, the water flows can be blocked by the composite geomembrane, and finally, the filled geobags achieve a stable breach blocking effect. The method is convenient in material taking, easy and convenient to operate, economical, environmentally friendly and especially suitable for rapid rescue during rapid flow passing at the dike breach.

Description

technical field [0001] The invention relates to the technical field of water conservancy engineering, in particular to a rapid emergency rescue method for dam breaches in flood seasons by using geosynthetic materials to intercept flow. Background technique [0002] Earth-rock embankment is a kind of common water-retaining structure, and it is a basic engineering facility for water storage and flood control. At present, more than 280,000 kilometers of embankment projects and more than 80,000 small reservoirs have been built in my country, most of which are filled with earth and stone materials. Earth-rock dams have been subjected to factors such as water-retaining immersion, water scour, seepage, and damage to animals and plants such as termites for a long time. Many dams have quality problems or diseases to varying degrees. [0003] Under the action of high water level in the flood season, the dam is damaged by flood or other factors, and its weak parts are prone to major d...

AI Technical Summary

Problems solved by technology

These materials need to be specially produced in advance, which is time-consuming and expensive

At the same time, large transport vehicles and special lifting equipment are required, which is difficult to implement in some restricted areas

[0007] (3) In the preparation of flood control materials and emergency rescue, the traditional emergency rescue method generally requires a large amount of manpower to implement, and the operation safety is low, and the emergency rescue efficiency is low

[0008] Therefore, the existing technology is difficult to be used for the efficient treatment of embankment breaches with high flow velocity and complex water conditions during the flood season. It is necessary to provide a rapid emergency rescue method for embankment breaches in flood seasons using geosynthetic materials to intercept the flow.

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