Arch dam supporting girder template structure and construction method

Abstract

The invention discloses an arch dam supporting girder template structure and a construction method. The arch dam supporting girder template structure comprises an upstream surface template and a downstream surface template, wherein the upstream surface template is arranged on the upstream side of the downstream surface template; the upstream surface template comprises first supporting trusses, second supporting trusses, steel templates and shaping wood templates; the first supporting trusses are used as bearing supports of a construction platform and the upstream surface template, and the bottom of the first support trusses are buried in the concrete of the gate piers at the two sides; the downstream surface template comprises embedded parts, third supporting trusses and combined prefabricated templates; and the embedded parts are buried in the concrete of the gate piers at the two sides, and the bottom of the third supporting trusses are fixedly connected to the embedded parts. According to the template structure and the construction method, the problem that the existing single outer support truss is difficult in disassembling is solved, and safe and high-efficiency construction of the supporting girder is realized.

Description

technical field [0001] The invention relates to an arch dam supporting girder formwork structure and a construction method, and relates to the technical field of civil engineering, in particular to a formwork structure for arch dam back arch gates supporting girders such as bottom holes, deep holes or middle holes. Background technique [0002] Concrete arch dams are generally built in relatively narrow and steep river valleys, lacking the conditions for arranging riverside spillways, and the dam body is often used for flood discharge. [0003] At present, the most common flood discharge method of arch dams is mainly to open surface holes, middle holes, deep holes or bottom holes in the dam body. In order to meet the requirements of flood control, arc gates are often installed behind the dam to adjust the water flow, and supporting girders are arranged to bear the water thrust of the arc gates. Because the supporting girder needs to bear a large water thrust, especially in ...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to provide a formwork structure and construction method for supporting girders of arch dams. By setting a combined prefabricated formwork on the downstream side of the supporting girders, it can solve the problem of removing the formwork of the existing single outer support truss, and realize safe, high-quality and efficient construction of the supporting girders.

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