A repairable drainage tunnel, construction method and repair method

Abstract

The invention relates to a drainage tunnel capable of being overhauled. The drainage tunnel capable of being overhauled comprises a tunnel body; a culvert pipe distributed in the length direction of the tunnel body is embedded in the bottom of the tunnel body; the inlet end of the culvert pipe is provided with a movable sealing and plugging mechanism; when the sealing and plugging mechanism is opened, the culvert pipe is communicated with the water inflow end of the tunnel body; and when the sealing and plugging mechanism is closed, the culvert pipe is isolated from the tunnel body. In the water shortage time period, the culvert pipe can be utilized for overflowing, a construction machine and personnel can enter the draining tunnel, comprehensive overhauling and maintaining are performed on the drainage tunnel, and durability of the drainage tunnel is improved; and overhauling is convenient, and compared with the prior art, the overhauling efficiency is greatly improved. It is not needed to arrange an isolation wall in the tunnel body of the drainage tunnel capable of being overhauled, the overflowing area is large, the water draining capacity is high, compared with the patent CN105421296A, the water flow speed in the flood season can be properly lowered, and the durability of the draining tunnel is improved; and during excavating construction, the culvert pipe is laid below abottom plate, the width of a construction passageway in the tunnel is not reduced, and the mechanical construction degree of the tunnel is not lowered.

Description

technical field [0001] The invention belongs to the technical field of water conservancy and hydropower engineering construction, and relates to a drain tunnel that can be repaired, in particular to a drain tunnel that can be used for escape during construction and repairable during operation in a spoil yard. Background technique [0002] During the construction of hydropower stations, a large amount of spoils will inevitably be produced. Random spoils will not only cause soil erosion and damage the ecological environment, but also induce geological disasters such as mudslides and landslides. Therefore, one or several The waste slag yard is concentrated to store the waste slag. At present, my country's hydropower stations are mainly concentrated in the southwest region. Limited by the topographic and geological conditions in this area, the waste slag field is often arranged in the gully, and the drainage problem of the slag field after the slag pile is solved by digging drai...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, one of the present inventions is to provide a repairable drainage tunnel to solve the problems of inconvenient and time-consuming maintenance of the existing drainage tunnels; the second purpose of the present invention is to provide a repairable drainage tunnel construction method; the third purpose of the present invention is to provide a maintenance method with high maintenance efficiency and short time consumption

Images