Reservoir deepwater sediment cleaning method

Abstract

The invention provides a reservoir deepwater sediment cleaning method. The method comprises the following steps that, S1, underwater topography is detected, a desilting range according to the condition of reservoir sediments is determined, and excavation partitions are divided; S2, an assembled water surface operation platform and a negative-pressure silt pumping device reach the working position,the negative-pressure silt pumping device carries out desilting operation, and striping excavation is carried out; sediments pumped by the negative-pressure silt pumping device are conveyed into a slag collecting cage of the slag conveying barge; and the slag conveying barge moves to the shore, the slag collecting cage is hoisted to the shore, the sediments are loaded into a vehicle, and the vehicle conveys the sediments to a designated stacking place; S3, another excavation partition is chose, and the step S2 is repeated; and S4, desilting operation of all excavation partitions is completed,the underwater environment is detected again, and desilting operation is carried out again when necessary. The method is suitable for cleaning various sediments of various reservoirs, is simple and rapid to operate and high in dredging efficiency, and does not influence normal power generation of a hydropower station, sand discharging hole operation and flood discharging.

Description

technical field [0001] The invention belongs to the technical field of dredging, and in particular relates to a method for cleaning deep-water sludge in a reservoir. Background technique [0002] As the hydropower engineering industry has entered the "post-hydropower era", the problems of reduced water supply capacity and damaged power generation caused by reservoir siltation and tailwater siltation have gradually emerged. It is estimated that the cumulative storage capacity lost due to siltation in my country has reached 20 billion m3. With the advancement of national ecological construction, restricted mining of rivers and mines, construction materials and pollution control needs in the fields of infrastructure (urbanization, transportation, water conservancy) The proportion of sand and gravel in the reservoir silt is high, which is a resource that can be exploited. There are opportunities for potential tapping and transformation of hydropower stations and urban and rural w...

AI Technical Summary

Problems solved by technology

[0003] Because most of the reservoirs have no navigable conditions, it is difficult to transport large-scale dredgers; the thickness of the gravel layer is uneven, the content of large particle sizes is large, and the bottom plate is a concrete structure, so mechanical dredgers such as grabs

Images