Anti-floating device for tunnel construction, steel mould board lining rig and anti-floating construction method

Abstract

The invention provides an anti-floating device for tunnel construction, a steel mould board lining rig and an anti-floating construction method. The device comprises an anti-floating column, a lifting cylinder and a lifting mechanism, wherein the lower end of the anti-floating column is connected to a door frame of the steel mould board lining rig through the lifting cylinder; a plurality of limiting holes are axially formed in the upper part of the anti-floating column; the limiting mechanism comprises a limiting mounting body and a limiting pin, wherein the limiting mounting body is mounted at a mould board of the steel mould board liming rig; a limiting mounting through hole is formed in the limiting mounting body; the limiting pin passes through a limiting pin mounting hole and is in match with the limiting holes in the anti-floating column. The device is high in anti-floating performance, simple in structure, convenient to mount, good in lining effect, and high in construction efficiency.

Description

technical field [0001] The invention belongs to the technical field of engineering machinery, and in particular relates to an anti-floating device for tunnel construction, a steel mold lining trolley and an anti-floating construction method. Background technique [0002] The steel formwork lining trolley is special equipment that must be used in the secondary lining of the tunnel construction process. It is used for the concrete lining construction of the inner wall of the tunnel. Affected by the buoyancy generated by the concrete, when the buoyancy is greater than the self-weight of the trolley, the steel formwork and the trolley as a whole will float and deform. The floating of the trolley will cause virtual connection or separation between the portal frame and the track. When the virtual connection occurs, the portal frame will be displaced relative to the lining formwork, the formwork will be deformed, and the geometric dimensions of the lining will be deviated, resu...

AI Technical Summary

Problems solved by technology

The floating of the trolley will cause virtual connection or separation between the portal frame and the track. When the virtual connection occurs, the portal frame will be displaced relative to the lining formwork, the formwork will be deformed, and the geometric dimensions of the lining will be deviated, resulting in permanent quality defects. When detached, the lining trolley will be unstable. , collapsed, causing damage to the trolley, scrapping the poured concrete and even causing casualties

[0003] There are two anti-floating methods for lining trolleys in the prior art. One is the traditional method of increasing the self-weight of the trolley to overcome the buoyancy force of the concrete; the other is to design a special anti-floating mechanism, such as the Chinese patent CN202718678U proposes a full-circle tunnel needle beam trolley with an anti-floating mechanism. The anti-floating mechanism is arranged at the front and rear ends of the trolley. The defects are mainly manifested in: ①The trolley is heavy and has a complex structure: the gantry of the trolley needs to extend a certain distance to the front and rear ends to support the anti-floating mechanism, which causes the overall weight of the trolley to increase and the structure is complicated; ②The anti-floating effect is poor: The anti-floating mechanism is set at the front and rear ends of the lining trolley, and the buoyancy of the concrete mainly acts on the formwork of the trolley, and the middle part of the trolley is prone to floating deformation due to the lack of effective anti-floating support; ③The effective lining area is reduced: due to the design The door frame of the trolley must extend to the front and rear ends, resulting in a reduction in the effective lining area of ​​the trolley and low construction efficiency

Images