Lining and Construction Method of Steel Formwork Pallet for Circular Water Conveyance Tunnel

Abstract

The invention relates to the lining of a steel formwork trolley for a circular water delivery tunnel and a construction method, which is mainly applicable to the lining construction of a variable section of a circular water delivery tunnel. The main construction steps include: construction preparation, needle beam installation, formwork installation, needle beam walking, Needle beam outer frame and formwork system walking, trolley in place, installation of electric vibrator, trolley reinforcement, concrete pouring and demoulding, in which trolley side formwork and trolley bottom formwork and trolley side formwork and trolley top formwork They are all connected by formwork steel hinges. The shrinking ring mold is set on the formwork of the trolley. The formwork of the trolley can be adjusted according to the size of the section of the tunnel. The method of adding and subtracting the bottom form or changing the door frame can solve the problem that the arc length of the formwork is not equal to the arc length after the section is enlarged or reduced, which simplifies the construction procedure, not only speeds up the construction progress, but also ensures the vibration quality. It has good economic and technical benefits.

Description

Technical field [0001] The present invention relates to a circular water tunnel cave steel molding and construction method, which is mainly suitable for liner construction of circular water tunnel changes. Background technique [0002] Circular tunnels are a circular structure in pressure tunnels such as structural water and hydropower projects such as structural water and hydropower projects, and some irrigation tunnels, etc. due to reasonable and stress resistance. It is necessary to prevent water flow from scratching, and the quality requirements for concrete pouring are high. [0003] In actual engineering, due to some special geological reasons, circular tunnel support and lining process, the tunnel cross-sectional size will change according to geological conditions and water supply, and the traditional lining trolley is by adding and decrease the bottom mold or Changing the door frame to solve the arc length of the template and the inclination of the arc length or the reduc...

AI Technical Summary

Problems solved by technology

[0003] In actual engineering, due to some special geological reasons, the size of the tunnel cross-section during the support and lining process of the circular tunnel will change according to the geological conditions and the amount of water delivery. Changing the way of the door frame to solve the problem that the arc length of the formwork is not equal to the arc length after the section is enlarged or reduced, the disassembly and assembly workload is large, time-consuming and laborious, and the vibration is uneven, the quality of concrete pouring is poor, and the water leakage is serious; in view of this, In order to be applicable to tunnels with different cross-sectional sizes, improve the efficiency of lining formwork and the quality of concrete pouring, and reduce construction costs, it is urgent to invent a simple and effective steel formwork trolley lining and construction method for circular water delivery tunnels

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