Barrier lake dam body dredging method

Abstract

The invention discloses a barrier lake dam body dredging method. Firstly, a water storage groove is dug on a barrier lake dam body according to the thickness and length of the barrier lake dam body and the soil and stone stability of the barrier lake dam body; a plurality of water storage holes are dug in corresponding positions in the water storage groove; and water in a riverway is injected intothe water storage groove and the water storage holes by a water suction pump, so that the water in the water storage holes and the water storage groove is used for flushing away a landslide dam. By using the mode, the flushing power of the water is used for dredging the riverway. Compared with a riverway dredging mode of directly using explosives for blasting, the mode is safe. Further, before the water is injected into the water storage groove and the water storage holes, grooves are dug at the two sides of the water storage groove along the riverway or at least one row of holes are drilled;low-temperature liquid is injected into the grooves or the holes so as to freeze the soil bodies around the grooves or the holes; and therefore the secondary blockage due to soil body collapse at twosides of the dam body after the dam collapse can be prevented.

Description

technical field [0001] The invention relates to flood fighting and disaster reduction technology, in particular to a method for dredging a dam body of a dammed lake. Background technique [0002] A barrier lake refers to a lake formed by landslides, earth-rock flows or lava blocking the river channel and storing water to a certain extent. The formation of a barrier lake is usually caused by unstable geological conditions. When the dam body of a barrier lake is scoured, eroded, or dissolved At that time, the barrier lake is easy to break its embankment, which will cause devastating damage to the downstream area. Most of the barrier lakes will continue to be filled with water from the original river within a few days after formation, and the accumulated water will be enough to break the embankment. Therefore, once the barrier lake is formed, flood control measures must be taken as soon as possible. [0003] After the formation of the barrier lake, dredging the river channel a...

AI Technical Summary

Problems solved by technology

[0003] After the formation of the barrier lake, dredging the river channel as soon as possible is the best way to solve the risk of the dam failure of the barrier lake. At present, the method of directly placing explosives on the dam body of the barrier lake is usually used to dredge the channel. The impact force of this method is difficult to control. Once the control is not good, excessive blasting will occur, and the situation will get out of hand.

Images