Tunnel rigid-flexible combined waterproof method

Abstract

The invention discloses a concrete micro crack reinforcing construction method. The construction method includes the following steps: (1) repairing cracks having the width of within 0.3 mm; (2) repairing cracks having the width of 0.3-0.5 mm; and (3) repairing through cracks. Moisture in concrete can be given outward completely, and in this way, the durability of a concrete structure can be greatly improved. It is worth mentioning that CM-DPS has excellent nano reinforcing bar performance, can provide anti-deformation and anti-tensioning performance of a concrete surface, and has absolute technological leading edge. The capillary crystalline protective layer can play a role in structure reinforcement, can play a role in connection such as adhesion, is simple in construction, and is reasonable in cost; and in addition, a reinforcing material has excellent anti-aging performance, can avoid decrease in cohesive property, anti-shearing ability and waterproof performance due to high temperature, rolling, lower temperature and frost.

Description

technical field [0001] The invention relates to a rigid-flexible composite waterproofing method for tunnels. Background technique [0002] Tunnel is an underground engineering structure specially used for transportation. It is a large permanent building on land transportation and railway lines. With the modernization of road transportation and the high standard requirements of railway speed-up, the role and status of tunnel engineering in traffic engineering is becoming more and more important. Because the tunnel runs through the mountain, its environmental conditions and stress conditions are extremely complex, and the technical standards adopted in different construction years are not uniform, as well as some limitations in design and construction. There are many diseases in the existing tunnel structure. . Take railway tunnels as an example: by the end of 2006, there were 6495 tunnels in operation across the railway, with a total extension of 3768.7km. There are a tota...

AI Technical Summary

Problems solved by technology

At present, the waterproof materials in tunnel engineering are mainly waterproof boards and waterproof membranes, but from the experience of using this waterproof system, such a waterproof system has the following shortcomings: the waterproof board and waterproof membrane itself cannot be closely attached to the concrete, and the installation The impact during design, protrusions on the back, etc. will easily puncture the waterproof board, resulting in water leakage; if there are large cavities and unevenness in the wall concrete, when pouring the secondary lining, the waterproof board and coiled material will be subject to greater tension. The local area will become thinner or even damaged, especially the junction is prone to fracture and damage; the joint between the waterproof board and the waterproof board is a weak link, and a little carelessness will lead to the failure of the entire waterproof system; the waterproof board lacks closed surrounding rock and primary The capacity of cracks on the surface of the lining, groundwater may diffuse in the space behind the waterproof board, and affect the secondary lining; due to the rheological properties of the surrounding rock, when the stress of the surrounding rock is adjusted in the later period, natural disasters such as earthquakes occur, the surrounding rock and the initial support will be affected. Deformation, waterproof boards and membranes are prone to puncture damage when the base surface is uneven or have prominent points, resulting in failure of the waterproof layer; at present, waterproof boards and waterproof membranes are laid manually, the efficiency is low, and the laying quality cannot be guaranteed. Rivet laying or nailless welding process will cause certain damage to the waterproof board, and quality problems are prone to occur