Secondary lining vault anti-disengaging device and construction method

Abstract

The invention discloses a secondary lining vault anti-disengaging device and a construction method. According to the anti-disengaging device, a secondary lining is arranged below a primary lining of the device, a lower-layer reinforcing mesh and an upper-layer reinforcing mesh are arranged in the secondary lining, a bottom formwork is arranged below a next-section secondary lining and is in lap joint with a previous-section secondary lining, an end formwork is arranged in front of the next-section secondary lining, a horizontal grouting pipe I and a horizontal exhaust pipe I are arranged belowthe primary lining, small holes are punched in the peripheries of the horizontal grouting pipe I and the horizontal exhaust pipe I and are wrapped with filter cloth, 3-6 detection pipes are arrangedalong the central axis of the secondary lining of each section, the tops of the detection pipes are 12 cm lower than the surface of the primary lining, and the detection pipes penetrate into positioning sleeves fixed on the upper-layer reinforcing mesh and the lower-layer reinforcing mesh. According to the anti-disengaging device, tunnel secondary lining vault concrete disengagement can be prevented, and the secondary lining construction quality is improved.

Description

technical field [0001] The invention relates to secondary lining construction of tunnels, in particular to a secondary lining vault anti-vacation device and a construction method. Background technique [0002] In the process of tunnel construction, the prior art often first supports the tunnel first, and then pours the secondary lining concrete. Due to the influence of the construction defects of the secondary lining concrete of the tunnel and the shrinkage rate of the concrete itself, there will inevitably be gaps or even cavities between the secondary lining concrete poured on the tunnel vault and the primary support, due to the thermal expansion and contraction of the air in the cavity , In serious cases, cracks will appear in the secondary lining concrete, resulting in water leakage at the top of the tunnel, burying a safety hazard for the subsequent opening of the tunnel. [0003] The existing technical solutions are: traditional technology 1: After the lining construc...

AI Technical Summary

Problems solved by technology

Due to the uneven distribution of void points, it is impossible to determine where the void is located in advance, and the effect is not ideal; traditional technology three: grouting with mold

The traditional molded grouting technology grouts without removing the formwork, and the grouting pressure will damage the secondary lining that has not yet reached its strength

Images