A construction method of dam surface hole connecting beam support structure

Abstract

The invention discloses a supporting structure and a construction method of a beam connecting a dam surface hole. A plurality of prefabricated concrete beams parallel to each other are arranged between the top sides of every two adjacent surface hole gate piers. The grooves formed by the combination between the piers are used for pouring concrete; compared with the original bottom formwork on the top of the surface gate pier, the present invention directly assembles a plurality of grooves by hoisting a plurality of precast concrete beams to form a bottom support structure. Concrete is poured into the groove, and a whole plate support structure is formed after forming. The steps of template presetting and dismantling are completely removed in the middle, and the prefabrication process of precast concrete beams can be carried out directly on the ground in advance, which greatly shortens the time. The pouring construction process of the subsequent connecting beams can be accelerated, the construction efficiency of the surface-hole connecting beams is improved, and the hidden danger of construction safety is reduced.

Description

technical field [0001] The invention relates to the technical field of concrete construction of hydropower engineering dams, in particular to a support structure of dam surface holes connecting beams and a construction method. Background technique [0002] The dam is the most important water retaining structure in the hydropower project. The concrete dam is generally equipped with a certain number of surface holes in the dam section of the river bed to facilitate the release of floodwater during the flood season and ensure the normal operation of the project construction. The structure of the surface hole of the dam is complex, and the construction is difficult, and the dam should have the ability to deal with flood control after the middle hole is constructed. Therefore, the construction progress is relatively tight. It is an arc door supporting and twisting force structure, which requires high construction quality. The construction of this part takes up a straight construc...

AI Technical Summary

Problems solved by technology

The structure of the surface hole of the dam is complex, and the construction is difficult. After the dam is constructed through the middle hole, it should have the ability to deal with floods. Therefore, the construction progress is relatively tight. The connection of the surface hole to the girder is the most critical link in the construction of the surface hole. It is an arc door supporting structure with high construction quality requirements. The construction of this part occupies a straight line construction period, and the progress pressure is high. The construction part is surrounded by empty spaces, and the safety risk is high.

Before pouring the existing surface hole connecting girder, it is necessary to prefabricate the formwork on the top of the surface hole gate pier in advance, and then pour and form it as the bottom form of the surface hole connecting girder. In the construction process of connecting girder pouring, during the whole process, the prefabrication and dismantling of the formwork are carried out at high altitude on the surface hole pier, which has low work efficiency and great safety hazards

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