A reservoir dredging pipeline system and its laying method

Abstract

The invention discloses a reservoir dredging pipe system and a layout method of the reservoir dredging pipe system, belonging to the technical field of a water conservancy project. The reservoir dredging pipe system is characterized in that a preventive dredging pipe system and a restorative dredging pipe system are arranged according to different stages and shapes of reservoir sedimentation, wherein the preventive dredging pipe system is composed of main pipelines and a branch pipe bank and is arranged before the water is stored in a reservoir; the main pipelines are arranged on both sides of the river; a downstream end is connected with a culvert pipe under a dam; the branch pipe bank is transversely arranged on a water return section forming a delta; the branch pipe bank is uniformly distributed with sand discharge holes to intercept discharge of sediment on a delta scarp slop and prevent the delta from advancing; a restorative dredging pipe is arranged in the reservoir for forming deposit and is composed of the main pipelines which penetrate the deposit area, and of which the downstream end is connected with the culvert pipe under the dam or an underwater tunnel, branch pipes transversely connected to the main pipelines, and a tube connected to the branch pipes; the tube opening and a sand suction hole move to dredging, and a dredging area is covered; an underwater dredging pipeline system is prefabricated by segments on land and in towing floating connection; a water dredging pipeline system is arranged in a pipe ditch on the deposit surface, and sinks to the bottom of the reservoir and the bottom of ditch to dredge after being filled with water and exhauste, and the storage capacity of the reservoir is restored.

Description

technical field [0001] The invention relates to the technical field of hydraulic engineering. Background technique [0002] It is a common phenomenon that sediment is collected into the reservoir with the water flow to form silt. In order to slow down reservoir sedimentation and prolong the service life of reservoirs, traditional reservoir dredging usually adopts hydraulic methods such as clearing reservoirs and sand discharges, gravity flow sand discharges, and mechanical methods such as pump suction and vehicle hauling. However, hydraulic dredging consumes a huge amount of water resources, and it is not suitable for the basic form of reservoir siltation such as a delta. Mechanical dredging not only consumes a lot of energy, but also is limited by water surface and water depth conditions, and the cost is high. No matter what kind of traditional dredging method is adopted, the repeated problems of reservoir dredging and sedimentation cannot be avoided. "Research on Self-p...

AI Technical Summary

Problems solved by technology

However, the amount of water resources consumed by hydraulic dredging is huge, and it is not suitable for the basic form of reservoir sedimentation such as a delta

Mechanical dredging not only consumes a lot of energy, but also is limited by water surface and water depth conditions, and the cost is high

No matter what kind of traditional dredging method is adopted, the repeated problems of reservoir dredging and sedimentation cannot be avoided

"Research on Self-priming Pipeline Sediment Discharge System of Xiaolangdi Reservoir" (Gao Hang, People's Yellow River, Vol. Surface dredging is carried out on the silted surface, which cannot sink evenly with the dredging of the reservoir