Hydraulic formwork trolley for primary lining of loess tunnel

Abstract

The invention provides a loess tunnel primary lining hydraulic formwork trolley, comprising a gantry and two formworks located on the upper part of the gantry, tires are arranged at the bottom of the gantry, guide rails are arranged at the top, and a formwork that can slide along the guide rails is arranged on the guide rails The support frame, the formwork support frame and the formwork are movably connected through bolts. The portal frame is also provided with a hoist for sliding the traction formwork support frame. The present invention adopts large formwork, which can improve the quality of lining masonry; when working, after the former formwork is poured and demoulded, it can be pulled through the latter formwork by a hoist, and the two formworks are poured in turn, which can shorten the strength time of molded concrete and improve work efficiency.

Description

technical field [0001] The invention relates to the field of tunnel lining construction, in particular to a formwork trolley used for one-time formwork concrete pouring of road and railway loess tunnels. Background technique [0002] After the tunnel is excavated and formed, initial support is required. At present, the initial support of tunnels usually adopts the anchor-sprayed support form based on the principle of the New Austrian Method. However, for special geological structures such as collapsible loess, the use of spray anchor support is not completely applicable. At present, loess tunnels at home and abroad have begun to adopt the composite lining method of primary molded concrete lining and secondary molded concrete lining. One lining mold Concrete construction generally adopts small steel formwork assembly construction, that is, after the excavation is completed, the small steel formwork and formwork support system will be installed manually, and the formwork asse...

AI Technical Summary

Problems solved by technology

However, for special geological structures such as collapsible loess, the use of spray anchor support is not completely applicable. At present, loess tunnels at home and abroad have begun to adopt the composite lining method of primary molded concrete lining and secondary molded concrete lining. One lining mold Concrete construction generally adopts small steel formwork assembly construction, that is, after the excavation is completed, the small steel formwork and formwork support system will be installed manually, and the formwork assembly and reinforcement will be completed. After the formwork is assembled and reinforced, the concrete pouring construction will be carried out. There are a large number of block steel molds, and the line shape is difficult to control. At the same time, it takes a long time for workers to install, which leads to long working hours under the excavation surface where there is a risk of block collapse. Therefore, this method has a low degree of mechanization, consumes a lot of labor, and slow construction progress. Construction safety is poor

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