A tunnel lining concrete insulation system and its construction method

Abstract

A tunnel lining concrete thermal insulation system comprises a lining trolley and a heating boiler. The tunnel lining concrete thermal insulation system is characterized in that a formwork of the lining trolley is provided with a thermal insulation layer, floor heating pipes are evenly mounted on the thermal insulation layer, cooling fins are mounted on the floor heating pipes, a hot water flow dividing pipe which is communicated with the floor heating pipes is mounted at one end of the lining trolley, and a cold water backflow pipe which is communicated with the floor heating pipes is mounted at the other end of the lining trolley; the hot water flow dividing pipe is communicated with the heating boiler through a water outlet pipe, and the cold water backflow pipe is communicated with the heating boiler through a backflow pipe. The tunnel lining concrete thermal insulation system has the advantages that the cooling fins can be cooled through a heating circulation system, a heat layer is generated around the formwork, hence, the inner and outer temperature difference is reduced in the concrete pouring process, and temperature cracks are avoided. The tunnel lining concrete thermal insulation system has the advantages of being good in thermal insulation effect and capable of controlling construction quality easily, thereby having a wide market prospect.

Description

technical field [0001] The invention relates to a thermal insulation system for tunnel construction, in particular to a tunnel lining concrete thermal insulation system. Background technique [0002] With the development of the national economy, more and more roads (railways) are newly built in mountainous areas, and the proportion of tunnel projects is gradually increasing. Integral steel formwork trolleys and pumped concrete construction techniques are commonly used in the secondary lining construction of tunnels. However, the cracks generated during the hardening process of concrete not only affect the appearance, but also leave hidden dangers to the quality of the project. Reasonable engineering and technical measures must be taken during construction to control and reduce the number and width of cracks in concrete. The main types of concrete cracks in tunnel lining are: drying shrinkage cracks, temperature cracks, deformation cracks caused by external loads, stubble jo...

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to overcome the deficiencies of the prior art mentioned above, and provide a tunnel lining concrete thermal insulation system. The present invention forms a heat layer around the pouring formwork to reduce the temperature gradient difference between the inside and the surface of the concrete during the pouring process, thereby Effectively solve the problem that the concrete will produce temperature cracks during the lining process of the tunnel

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