Formwork supporting system for south-and-north-side reserved tunnel opening of shield original well

Abstract

The invention discloses a formwork supporting system for a south-and-north-side reserved tunnel opening of a shield original well. The formwork supporting system comprises a formwork system, a supporting system, the reserved tunnel opening and a shield original well south-and-north-side reserved transverse channel. The formwork system and the supporting system are both arranged in the reserved tunnel opening of the shield original well south-and-north-side reserved transverse channel. The supporting system comprises a fastener-type scaffold; the shield original well south-and-north-side reserved tunnel opening and a shield well side wall structure are synchronously poured; a bottom support of the reserved tunnel opening adopts the fastener-type scaffold as a supporting system; side wall supports adopt diagonal brace steel pipes; and the supporting system in the reserved tunnel opening and a shield well supporting system are connected into a whole. By arranging the formwork system and the supporting system in the reserved tunnel opening of the north side of the shield original well south-and-north-side reserved transverse channel, the arch part arc-shaped part and annular beam sidewalls of the reserved tunnel opening are supported, and the formwork structure strength is high; and the bearing strength of the supporting system is improved, thus supporting of the supporting systemis firmer and more reliable, and the construction risk is reduced.

Description

technical field [0001] The invention relates to the technical field of subway tunnel construction, and more specifically relates to a formwork support system for reserved openings on the north and south sides of a shield tunnel opening. Background technique [0002] In subway construction, as an advanced tunnel construction method, "shield tunneling method" has the advantages of high degree of mechanical automation, fast construction speed, small ground disturbance, no interference with road traffic, and small impact on the surface environment. It is currently used in tunnels in my country. The engineering field has been widely used, and the proportion of shield tunnels in my country's transportation field will increase in the future. [0003] The first work to be carried out in the construction of a tunnel using the shield method is the initial construction of the shield machine. If the initial construction of the shield machine is not carried out in the station, it is usual...

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Problems solved by technology

[0004] At present, when the openings are reserved on the north and south sides of the shield tunnel for initial construction, the shield tunneling for the openings reserved on the north and south sides is a very important link in the subway construction. Manual or mechanical chiseling is required for the construction of the openings reserved on the north and south sides. In addition to the glass fiber reinforced piles at the portal, it takes a long time to chisel and clean up, the flatness of the portal is poor, and the risk of soil collapse and soil erosion is high at the beginning, and the sealing materials for the portal are wasted seriously

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