Tunnel lining double-trolley maintenance construction method suitable for alpine region

Abstract

The tunnel lining double-trolley maintenance construction method suitable for the alpine region comprises the steps that a, after secondary lining concrete is demolded, a secondary lining formwork trolley moves forwards to a next pouring station, and a constant-temperature and constant-humidity steam-curing trolley moves to a next steam-curing station; b, after the constant-temperature and constant-humidity steam-curing trolley reaches a steam-curing station, a telescopic temperature real-time monitoring device monitors the internal temperature of the lining in real time, and it is ensured that a steam-curing water constant-temperature device stabilizes steam-curing water within the range of the internal temperature of the lining + / -15 DEG C; c, fixing the constant-temperature and constant-humidity steam-curing trolley at a steam-curing station to perform secondary lining steam-curing, and meanwhile, enabling the back-and-forth spraying and curing trolley to perform back-and-forth spraying and curing on all sections of which the curing age does not reach the standard behind the secondary lining concrete steam-curing station; and d, after demolding of the secondary lining formwork trolley is completed, the steps a-c are repeated, and maintenance construction continues to be conducted forwards. The maintenance quality of secondary lining concrete can be improved, time is saved, and the construction equipment cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of tunnel construction, and in particular relates to a tunnel lining double-trolley maintenance construction method, which is especially suitable for use in alpine regions and has obvious advantages in non-alpine regions. Background technique [0002] The traditional tunnel lining maintenance period is 14 days. After the second lining formwork trolley is poured, it will be cured by a constant temperature and humidity steam curing trolley. Although the steam curing temperature is constant, the temperature of the second lining concrete is changing, resulting in the initial stage of steam curing. There is a large difference between the steam curing temperature and the internal temperature of the second-lined concrete, which leads to cracking on the surface of the second-lined concrete. Especially for alpine regions, the temperature difference between the inside and outside of the secondary lining concrete is to...

AI Technical Summary

Problems solved by technology

[0003] In addition, since the second lining formwork trolley moves forward to the next pouring station after pouring, the constant temperature and humidity steam curing trolley then moves forward to the next steam curing station, which makes the steam curing time of each section of concrete very limited. The curing time is the pouring time of the second-lined concrete at one end, usually 3 days, and the steam-cured time is short, and it is easy to cause quality defects of the second-lined concrete

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