Method for protecting underground powerhouse gate shaft against water seepage

Abstract

The invention relates to a method for protecting underground powerhouse gate shaft against water seepage. The method comprises the steps that firstly, a water collecting well is arranged at the position of a dewatering pump on the downstream side; secondly, leakage treatment is conducted on the wall of the gate shaft and the bottom of the gate shaft, leakage points and leakage seams are found, drainage channels are dug, drainage pipes are embedded, and water is guided to peripheral drainage ditches; thirdly, overall finishing treatment is conducted on the wall of the gate shaft, and the wall of the gate shaft is coated with waterproof paint; fourthly, steel bars are implanted in the bottom of the gate shaft through drilling, holes are sealed through grouting, the steel bars are fixedly connected to a base plate and bound together to form a bar-mat reinforcement, roughening is conducted at the bottom of the gate shaft, and concreting is conducted with the second quadrant of a gate door as the start point and the water collecting well as the fourth quadrant according to the slope ratio of 1:200; drainage ditches are reserved on the periphery of a wall according to the inclination of 1:100, and the bottom of the gate shaft is coated with waterproof epoxy paint. By the adoption of the method, the gate shaft is protected against water seepage, the site is clean, tidy and attractive, operation is convenient, and the requirement for safety production of the gate shaft is met.

Description

technical field [0001] The invention relates to an anti-immersion method for gate wells of underground powerhouses, and in particular relates to a method for conventional hydropower stations, pumped storage power stations and hydraulic structures, etc. due to large-area concrete pouring, too dense steel bars, and transportation distance of mixer trucks. It is a method of anti-immersion treatment for problems such as concrete surface cracks and honeycomb leakage caused by factors such as far away, or poor pouring and compaction, temperature difference during construction, and improper design and construction control. Background technique [0002] Cracks in concrete in conventional hydropower stations and pumped storage power station (hydraulic engineering) buildings are inevitable, and various cracks in concrete and reinforced concrete structures are also inevitable, especially in hydraulic engineering buildings. Due to large-area concrete pouring, reinforcement Too dense, ma...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of water seepage in different degrees in the tailwater accident gate well, and to provide a safe and simple method for preventing flooding in the gate well of the underground powerhouse to solve the problem of water seepage at the bottom and wall of the gate well of the underground powerhouse