Surge shaft turnover formwork construction method

Abstract

The invention belongs to the field of underground engineering vertical shaft construction, and particularly relates to a surge shaft turnover formwork construction method. The surge shaft turnover formwork construction method comprises the steps of structure type selection of a turnover formwork, panel selection of the turnover formwork, supporting system design of the turnover formwork, lining construction of the turnover formwork and the like. The steel frame shaping mirror surface bamboo glue formwork turnover construction technology for the extra-large-diameter surge chamber concrete lining has the advantages that 1, the engineering construction investment cost is reduced; 2, the construction safety is ensured; 3, the appearance quality of the concrete lining is ensured; and 4, restriction means are reduced, and for the vertical shaft structure with the extra-large diameter and a not-deep shaft, the shaping mirror surface bamboo glue formwork turnover construction technology is further advanced in China. The turnover formwork system is light in self weight, convenient to disassemble and assemble, easy to operate and high in construction speed, and the appearance quality of concrete can achieve the mirror surface effect; meanwhile, investment can be saved, construction cost is reduced, and construction safety is ensured; and good quality benefits are created, and popularization and application are easy. The steel frame shaping mirror surface bamboo glue formwork turnover construction technology has good popularization value and application prospect in engineering construction with the extra-large diameter and the not-deep shaft.

Description

technical field [0001] The invention belongs to the field of shaft construction in underground engineering, and in particular relates to a form-turning construction method for a surge shaft. Background technique [0002] The existing shaft lining mainly adopts the construction technology of slip form continuous sliding up one-time pouring forming or combined small steel form layered pouring forming. The technology of this invention relies on the surge chamber with a diameter of 29.6m in the Laxiwa Hydropower Station. Due to the intersecting caves and wells in the surge chamber, the shape of the surge chamber is large, but the depth of the well is only 34.5m, the one-time sliding height is too short, and the shaft slides The area of ​​the mold plate is large, the size of the sliding form is difficult to control, and the steel structure is heavy. Compared with the layered construction of ordinary small steel plates, the investment is large and not economical. The strength, sti...

AI Technical Summary

Problems solved by technology

The technology of this invention relies on the surge chamber with a diameter of 29.6m in the Laxiwa Hydropower Station. Due to the intersecting caves and wells in the surge chamber, the shape is complex, and the diameter of the cave is large but the depth of the well is only 34.5m. The one-time sliding height is too short. The formwork area is large, the size of the sliding form is difficult to control, and the steel structure is heavy. Compared with the layered construction of ordinary small steel plates, the investment is large and not economical. The strength, stiffness and stability of the sliding form are not safe enough, and the construction quality is also difficult to guarantee. , the space for assembling and dismantling the sliding form is also limited

However, the reinforcement of combined steel formwork is difficult and easy to run, the joints are not tight and easy to leak, and the construction quality is difficult to guarantee; and the disassembly and assembly of combined steel formwork takes up a lot of warehouse preparation time, and the construction procedure is cumbersome, which affects the progress of the project

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