Debris flow blocking structure and blocking method

Abstract

The invention discloses a debris flow blocking structure and a blocking method. The debris flow blocking structure comprises an anchor rod, an inhaul cable, a groove, gravity piers and a connection cable, wherein the anchor rod is arranged in a debris flow ditch, an anchor section of the anchor rod extends into bedrock, one end of the inhaul cable is connected with the anchor rod, the other end ofthe inhaul cable is connected with the gravity piers, the inhaul cable and the anchor rod are detachably connected, the groove is dug in the debris flow ditch, a plurality of gravity piers are arranged in the groove, the gravity piers are arranged in the groove in parallel, and the gravity piers are connected through the connection cable. According to the debris flow blocking structure disclosedby the invention, the anchor rod can provide resistance, and a project amount is reduced; thus, project cost and construction time are saved. The blocking structure can stop large-particle stone in debris flow, so that flushing capacity of the debris flow is weakened, and debris flow disaster is prevented. In addition, the blocking structure disclosed by the invention can be freely disassembled and can be recycled for multiple times.

Description

technical field [0001] The invention belongs to the field of water conservancy engineering, and in particular relates to a debris flow retaining structure and a retaining method. Background technique [0002] Debris flow is an extremely harmful geological disaster. China has a large area of ​​mountains and steep terrain. Concentrated rainfall can easily cause debris flow. The basin of a typical debris flow generally includes the formation area, circulation area, and accumulation area. Debris flow prevention and control projects are generally set in the formation area or circulation area. At present, the most commonly used debris flow control measures are the use of retaining structures, such as steel cable grid dams, grid dams, sieve dams, comb dams, permeable arch dams, etc. The common problem with these dam-type retaining structures is that foundation excavation The engineering volume is large, the dam body engineering volume is also relatively large, the site constructio...

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Problems solved by technology

[0003] The invention provides a mud-rock flow retaining structure and a retaining method. The retaining structure is restrained by anchor cables. After the mud-rock flow flows through the retaining structure, the large-grained stones are intercepted, the carrying capacity of the mud-rock flow is reduced, and the destructive ability of the mud-rock flow is reduced, thereby effectively preventing the mud-rock flow and solving the construction problem. When the foundation needs to be excavated, the site construction conditions are poor, the construction time is long, and the engineering quantity and cost are high. The present invention is suitable for water-rock flow and dilute debris flow, and the depth of the bedrock in the flow area of ​​the debris flow ditch is less than 10 meters.

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