Quick construction formwork for middle arch secondary lining of separated island type underground excavation station

Abstract

The invention discloses a quick construction formwork for a middle arch secondary lining of a separated island type underground excavation station. The quick construction formwork comprises a main support bracket (1), a support bracket and a telescopic driving device, wherein the telescopic driving device is arranged on the main support bracket (1); the support bracket comprises a plurality of first support brackets (3) which are perpendicular to the main support bracket (1) and are horizontally distributed and a plurality of second support brackets (4) which are arranged on the first support brackets (3) and are vertically and obliquely distributed upwards; the main support bracket (1) comprises a peripheral support bracket and an internal support bracket, and the telescopic driving device is arranged in the peripheral support bracket; and an auxiliary support bracket (6) is arranged below the first support brackets (3) and is connected with the first support brackets (3) through a telescopic pivoting structure (5). The quick construction formwork can automatically extend and retract according to use requirements and has the advantages of flexibility in operation, high support strength, good support effect, high applicability, labor and time saving, low cost and high construction and economic efficiency.

Description

technical field [0001] The invention relates to the technical field of formwork design and construction applied to urban subway stations, in particular to a rapid construction formwork for the second lining of the middle arch of an isolated island type underground excavation station. Background technique [0002] Many subway lines are built along the road, and there are overpasses on the general road. The columns of the overpass will hinder the large-scale excavation of the road surface, so it is impossible to build a station in which the station hall and platform are integrated. The solution is that each track tunnel and the station hall are built on both sides of the overpass column respectively, and then the passage is dug between the columns to connect each track tunnel and the station hall. In addition, if the track tunnels are built under two parallel roads, the connecting passages will be built under the side streets. [0003] Further, subways are usually built unde...

AI Technical Summary

Problems solved by technology

This kind of formwork has the following disadvantages in the actual use process: before each section of construction, it is necessary to repeatedly break the guide tunnel wall, clean up the dregs in the cave, set up the scaffold after leveling the ground in the cave, and carry out the assembly of the formwork. The cycle is long, the operation is troublesome, and the investment of personnel is large, which requires a lot of human resources and increases the construction cost

In addition, for the middle arch of the separated island type underground excavation station with variable cross-section size and profile change, multiple sets of formwork need to be used according to the change of the cross-section size of the middle arch, which not only increases the cost of investment, but also cross-section operations, material and equipment transportation inconvenient

[0007]Therefore, there is an urgent need to solve the limited working space of the arch secondary lining in the isolated island type underground excavation station, the existence of cross operations, the need to invest in multiple sets of formwork, and the size of the section Problems such as single adaptability, low operating efficiency, and high construction cost

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