Construction method of assembled steel pipe sheet formwork suitable for rapid lining of circular tunnels

Abstract

The invention discloses a construction method of an assembly type steel pipe piece formwork suitable for rapid lining of a circular tunnel. The construction method mainly comprises the steps that S1,the assembly type steel pipe piece formwork is designed into formwork units with a certain length in the axial direction of the tunnel, and each tunnel formwork unit is divided into a bottom formwork,a left side standard formwork, a right side standard formwork and a top sealing formwork; S2, when the circular tunnel is excavated, sleeves are pre-buried in the left side and the right side of surrounding rock corresponding to the assembly type steel pipe piece formwork; S3, all the formworks are prefabricated in a steel pipe piece formwork processing factory; S4, the assembly type steel pipe piece formwork is assembled in the circular tunnel; S5, the steps S2-S4 are repeated until mounting of the whole formwork units is completed; S6, after the circular steel pipe piece formwork is assembled and fixed, concrete is poured, and the formworks are unloaded; and S7, the steps S2-S6 are repeated until lining construction of the whole circular tunnel is completed. The construction method hasthe arch effect, and the tunnel lining construction efficiency and the lining utilization efficiency are effectively improved.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to an assembled steel pipe sheet formwork construction method suitable for rapid lining of circular tunnels. Background technique [0002] A water hole dug in the mountain or underground. Hydraulic tunnels can be used for irrigation, power generation, water supply, discharge, water delivery, construction diversion and navigation. A tunnel in which the water flow has a free surface in the tunnel is called a non-pressure tunnel; a tunnel that fills the entire section and makes the tunnel wall bear a certain water pressure is called a tunnel under pressure. [0003] Circle is the most common shape in hydraulic tunnels. The speed of tunnel lining has a great influence on the progress and safety of the project. At present, steel formwork trolleys are mostly used as formwork for tunnel lining. On the one hand, a large number of external supports are required, which affects t...

AI Technical Summary

Problems solved by technology

The speed of the tunnel lining has a great impact on the progress and safety of the project. At present, steel formwork trolleys are mostly used for the tunnel lining formwork. On the one hand, a large number of external supports are required, which affects the traffic in the tunnel during the construction period.

On the other hand, the poured concrete needs to reach a certain strength before the formwork can be dismantled and used for the next pouring lining section. In addition, affected by the cost of the steel formwork trolley and the traffic in the tunnel, the utilization efficiency of the formwork is not high, which directly affects the safety of the entire tunnel. Lining speed

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