Reservoir door blocking sand treatment method based on movable flow guide pile group

Abstract

The invention discloses a reservoir blocking door sand treatment method based on a movable flow guide pile group. The method comprises the following steps that firstly, flow guide piles are driven; two rows of diversion piles are driven at the intersection of the main stream and the branch stream of the reservoir, and the diameters D of the diversion piles are the same; each flow guide pile and two adjacent flow guide piles define an equilateral triangle, and the side length of the triangle is smaller than or equal to 3D, so that the pile group forms a water retaining structure; 2, measuring the flow velocity; and thirdly, pile pulling is conducted, specifically, the flow guide pile at the position with the maximum flow speed is pulled out through a pile pulling device. According to the treatment method, a dam and a gate which are huge in cost do not need to be modified, sand digging operation is not needed, only pile driving, speed measuring and pile pulling are needed, cost is quite low compared with dam building and sand digging operation, operation is quite easy and convenient, operation can be conducted without waiting for a proper water level, operation can be conducted at any time, and operation efficiency is greatly improved. The problem of timeliness of barrier sand treatment is solved.

Description

technical field [0001] The invention relates to the technical field of river treatment. Background technique [0002] The main stream of some reservoirs has tributaries. When the reservoir stores water, its internal main stream water level will continue to rise. After the main stream water level rises, the water level difference with the tributaries will shrink or even disappear. Therefore, at the intersection of the tributary and the main stream, the water flow from the tributary to the main stream will inevitably slow down or even reverse, and the sediment carried by the main stream will be deposited at the intersection with the tributary to form a silt body, which we call reservoir retention. Mensa (as figure 2 shown). [0003] Reservoir blocking sand will block the connection between the main stream and the tributaries, so that the water in the tributaries can no longer flow into the main stream, which greatly reduces the effective storage capacity of the reservoir, s...

AI Technical Summary

Problems solved by technology

The disadvantage of this is that it is necessary to wait until the season when the water level is low, because there is no effective sand dredging condition when the water level is deep; The operation is difficult, and the equipment cost and labor cost are high (of course, it is far less than the cost of building a dam)

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