Acid-soluble drilling drainage structure of karst or faulted tunnel and side slope and construction method

Abstract

The invention relates to the field of civil engineering, and discloses a drainage structure of a karst or a faulted tunnel and a side slope and a construction method. The acid-soluble drilling drainage structure comprises a permeable section and a grouting section, the permeable section is located on the lower portion of a downwards-inclined drill hole, the grouting section is located on the upper portion of the drill hole, a water stop component is arranged between the permeable section and the grouting section, a permeable pipe is arranged in the permeable section, a cavity is formed in the permeable pipe. A water drainage pipe penetrating through the water stop component and extending outwards is arranged in the permeable pipe, the permeable pipe is filled with solid filling materials soluble in acid and insoluble in water, and the lower portion of the water stop component, the permeable pipe and the water drainage pipe are all made of acid-resistant materials or provided with acid-resistant surface layers. According to the drainage structure of the karst or the faulted tunnel and the side slope and the construction method,, construction controllability of the drainage structure can be improved while a grouting pressure is guaranteed.

Description

technical field [0001] The invention relates to the field of civil engineering, in particular to a drainage structure and construction method for karst or fault tunnels and side slopes. Background technique [0002] Local groundwater seepage occurs when the waterproof layer or lining structure of the tunnel is defective. Especially in water-rich karst and fault tunnels, water seepage is more serious. Water seepage from the wall of the tunnel enters the tunnel, causing problems such as water accumulation and freezing, which affect the safety of tunnel operation. In addition, water seepage damages the inner structure of the tunnel lining concrete and surrounding rock, reduces the durability of the tunnel structure, and shortens the service life of the tunnel. [0003] For gas tunnels, tunnel water seepage is often mixed with harmful gases such as gas. Some harmful gases are flammable and explosive. The escape of harmful gases into the tunnel will pose a safety threat during t...

AI Technical Summary

Problems solved by technology

However, it has been found in engineering field tests that the melting of soluble crystals is difficult to be controlled artificially. If the construction of the grouting section encounters stagnation and the grout fails to fully solidify, the ice will gradually melt due to the effects of groundwater and ambient temperature. Does not have the effect of isolating the slurry

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