Steel formwork trolley lining and construction method for circular water conveyance tunnel

Abstract

The invention relates to a steel formwork trolley lining and construction method for a circular water conveyance tunnel. The steel formwork trolley lining and construction method is mainly suitable for the lining construction of a variable cross-section of the circular water conveyance tunnel and comprises the mainly construction steps of construction preparation, needle beam installation, formwork installation, needle beam travelling, needle beam outer frame and formwork system traveling, trolley in place, electric vibrator installation, trolley reinforcement, and concrete pouring and demoulding, wherein a trolley side formwork and a trolley bottom formwork, and a trolley side formwork and a trolley top formwork are both connected in a hinged mode through template connecting steel, and ashrinkage ring mold is arranged on the trolley formwork. According to the steel formwork trolley lining and construction method, a formwork system can be adjusted according to the size of the sectionin a tunnel, the situation that the problem that the arc length of the formwork is not equal to the arc length after the section is increased or decreased is solved by adding or removing the bottom formwork or changing the portal frame in a traditional way is not needed, the construction procedure is better simplified, the construction progress can be accelerated, the vibrating quality can also beensured, and good economic and technical benefits are achieved.

Description

technical field [0001] The invention relates to the lining of steel formwork trolleys for circular water delivery tunnels and a construction method, and is mainly suitable for the lining construction of circular water delivery tunnels with variable cross-sections. Background technique [0002] Due to the reasonable structure and good mechanical performance of circular tunnels, pressurized tunnels such as power generation diversion tunnels, flood discharge tunnels, and sand washing tunnels in water conservancy and hydropower projects, and some irrigation diversion tunnels adopt circular structures. , To prevent water erosion, the quality requirements for concrete pouring are relatively high. [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 fram...

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

Images