Tunnel secondary lining concrete trolley maintenance system

Abstract

The invention discloses a tunnel secondary lining concrete trolley maintenance system. The system comprises a vehicle body traveling along a tunnel, a waterproof film covering the outer surface of thevehicle body and drooping along the two sides of the vehicle body, film air bags arranged on the two sides and the ends of the vehicle body to form a closed curing space between the surface of the waterproof film and a second lining face, an ultrasonic generator arranged on the vehicle body and used for generating constant-temperature and constant-humidity atomized water vapor, and a heating device, wherein an air outlet communicating with a jet orifice of the ultrasonic generator is formed in the surface of the waterproof film. Thus, liquid water is subjected to ultrasonic atomization through the ultrasonic generator, the outlet is heated, then the second lining face is subjected to constant-temperature and moisturizing maintenance through an air supply device by means of atomized watervapor, due to the fact that the droplet diameter of the atomized water vapor is small, the atomized water vapor can float in the closed curing space for a long time, comprehensive maintenance is formed for the second lining face, surface damage on the second lining face is avoided, meanwhile, due to the fact that the atomized water vapor is sprayed into the closed curing space, the situation thatmoisture in the tunnel is too heavy can be prevented.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a maintenance system for a concrete trolley for the second lining of a tunnel. Background technique [0002] With the rapid development of my country's economic construction, the number of tunnel projects is increasing day by day. Because the high-speed train will produce a strong wind tunnel effect when passing through the tunnel, the second lining concrete of the tunnel will generate greater pressure. Therefore, the tunnel structure must not only meet the settlement and deformation requirements, but also ensure that the surface of the secondary lining does not fall off, so as not to endanger the safety of trains. In the process of tunnel construction, apart from the raw materials and mix ratio, there is also a key condition that affects the strength and durability of the secondary lining concrete——concrete curing. [0003] After the concrete is poured, due to facto...

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Problems solved by technology

[0003] After the concrete is poured, due to factors such as hot climate and dry air, if no maintenance is carried out, the moisture inside the concrete will evaporate too quickly, resulting in dehydration, which will cause the cement in the gel to not be fully hydrated and cannot be transformed into a stable Crystallization, lack of sufficient adhesion, resulting in scaly or powdery exfoliation on the surface of the secondary liner

In addition, if the maintenance is not in place, the premature evaporation of water will also cause large shrinkage and deformation, and a large number of shrinkage cracks will appear, which will affect the durability and integrity of the second lining concrete

[0004] The traditional two-lined concrete maintenance adopts spraying curing, that is, after the second-lined concrete is demolished, the sprinkler or humidifying air gun is used for periodic spraying maintenance. This maintenance method has obvious disadvantages. First, the spraying method produces The water vapor in the water is relatively large, the diameter of the water droplet is too large, the water droplet cannot be in an atomized state, and it is easy to cause surface damage when it directly impacts the concrete surface

In addition, looking at the entire tunnel construction, because traditional maintenance cannot form a relatively airtight space, water will be continuously sprayed during the maintenance period, which will cause excessive moisture in the tunnel, and large-scale water accumulation on the tunnel maintenance ground. Affect the health of construction workers

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