Self-desilting and dredging method and apparatus for reservoir

Abstract

A method and apparatus for removing the silt and the floating garbage from reservoir is disclosed. A trunk is laid on the bottom of reservoir and passes through the dam. A drain valve is installed to its external end. The water valve and the movable branch pipes with sucking head are installed to the internal trunk. When said drain valve is opened, the silt and floating garbage can be sucked in the trunk and then drained out.

Description

technical field [0001] The invention relates to a method and a device for removing silt accumulated in a reservoir and floating objects on the water surface of the reservoir, in particular to a method and a device for dredging and clearing the reservoir by self-drainage. Background technique [0002] It is a natural property that the sediment carried by the water flow enters the reservoir, and the sediment is deposited at the bottom of the reservoir due to the slowing down of the flow velocity. For a long time, people have not or have not completely solved the principle of water and sand governance in reservoir construction. In addition, the initial concealment of the problem of reservoir sedimentation is easy to be ignored, and no effective prevention and control measures have been formed for a long time, resulting in sedimentation becoming a chronic disease of almost all river reservoirs. Sediment problems have negative impacts on reservoir construction in many ways, amon...

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Problems solved by technology

[0003] However, the current domestic and foreign reservoir sediment discharge methods, such as clear storage and muddy discharge, backwater discharge, scour along the way, scour back to the source, etc. Reservoir dredging") and the different weight discharge quicksand method that has been tested by the Ministry of Water Resources in the middle reaches of the Yellow River for many times have great limitations

First, the total amount of sediment discharge is limited, and the sediment problem of the reservoir cannot be fundamentally solved. For example, the above-mentioned sediment discharge methods of the Sanmenxia Reservoir have been used, but it is difficult to escape the doom of being almost a waste reservoir due to sediment deposition (mainly referring to the water storage function. )

Second, the water consumption is too large and the benefits are low

Due to the accumulation of a large number of floating objects in front of the reservoir dam, it seriously affects the safety of ships in the reservoir area and the normal operation of the power station.

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