Leaking stoppage and drainage method for tunnel crossing water-rich area

Abstract

The invention relates to a leaking stoppage and drainage method for a tunnel crossing a water-rich area. The method comprises the following construction steps of (1) performing hollow grouting anchor rod construction in a surrounding rock area needing leaking stoppage, and selecting an area with larger water yield for grouting and leaking stoppage; (2) repairing cracks on the surface of the surrounding rock area; (3) fully laying internal drainage grids on the surrounding rock area needing leaking stoppage, and fixedly connecting the internal drainage grids with hollow grouting anchor rods; (4) performing primary support construction; (5) forming a drainage channel in an inverted arch primary support area, forming side drainage grooves at the two sides of the tunnel, and arranging automatic water pumping mechanisms in the side drainage grooves; (6) digging a central drainage groove in the middle of the inverted arch primary support area, and arranging an automatic water pumping mechanism in the central drainage groove; and (7) performing secondary supporting construction on the whole tunnel. According to the method disclosed by the invention, a manner of simultaneously performing leaking stoppage and draining is adopted, so that geological disasters such as tunnel water burst can be effectively prevented while the safety of tunnel excavation construction is ensured, and the construction progress of the tunnel is accelerated.

Description

technical field [0001] The invention relates to the technical field of leak plugging and drainage construction of tunnel engineering, in particular to a method for leak plugging and drainage of tunnels passing through water-rich areas. Background technique [0002] Most of the tunnels in my country contain a large amount of surrounding rock, and there are water gushing and water-rich faults in some parts. Sometimes even the tunnels after construction will have local leakage. Water-rich tunnels have become one of the main problems of tunnels. During the construction of the tunnel through the water-rich zone, due to the influence of the water-rich fault zone, there will be risks of geological disasters such as water gushing and mud inrush, which not only pose a serious threat to construction safety, but also affect the surrounding environment. Under normal circumstances, when the tunnel faces sudden water leakage, water gushing, water inrush and other rich water conditions, tu...

AI Technical Summary

Problems solved by technology

The elements of leakage include water source, driving force and leakage channel. Grouting sealing is to seal the source groundwater in the surrounding rock outside the tunnel lining by forming a water stop ring with a certain thickness on the outside of the tunnel lining, but the water is rich in water. Tunnel grouting technology cannot quickly and efficiently block sudden water leakage, water gushing, water inrush, etc., and cannot effectively block the leakage channel, so the effect of this method is often not ideal; at the same time, due to the complex physical properties of rock and soil media Due to the complexity and disorder of groundwater flow in surrounding rocks caused by mechanical properties, trench drainage often cannot effectively cut off the seepage path of groundwater, and its effect is not ideal

[0004] Therefore, in the prior art as a whole, there is still a lack of technology that can effectively prevent geological disasters such as tunnel water gushing during the construction process of tunnels passing through water-rich areas while facilitating construction.