High-pier cast-in-place box girder super-high composite support system and construction method

Abstract

The invention relates to a high-pier cast-in-place box girder ultrahigh composite support system which comprises a rock-socketed pile foundation, a bearing platform, steel pipe columns, longitudinal and transverse hoop type connecting rods, bowl buckle type scaffolds and a pre-pressing soil bag. The rock-socketed pile foundation is arranged in a rock slope. The bearing platform is arranged at thetop of the rock-socketed pile foundation; a flange is pre-embedded in the top of the bearing platform; the flange is connected with the steel pipe columns; longitudinal and transverse hoop type connecting rods are arranged between the steel pipe columns; I-shaped steel lower cross beams, beret pieces and I-shaped steel distribution beams are sequentially installed at the tops of the steel pipe columns; protective barriers are arranged around the I-shaped steel distribution beams; bowl buckle type scaffolds are erected on the I-shaped steel distribution beams, box girder formworks are installedat the tops of the bowl buckle type scaffolds, and pre-pressed soil bags are hoisted through shaped cage frames. The system has the beneficial effects that the formwork supporting problem of steel pipe column bearing platform construction under the complex terrain condition is solved in the mode that the steel sleeve is embedded in the top of the rock-socketed pile foundation, the stability of bearing platform formwork supporting is effectively guaranteed, and therefore the bearing platform construction quality is guaranteed.

Description

technical field [0001] The invention relates to a high-pier cast-in-place box girder super-high composite support system and a construction method, belonging to the field of bridge engineering. Background technique [0002] With the continuous development of modern bridge construction technology, the construction technology of box girder pouring has also made great progress. The bracket pouring method is a relatively mature box girder pouring construction method in box girder construction. It has the advantages of convenient construction, simple technology, wide applicability, and no need for prefabricated sites, making it not only an important method for urban bridge construction It is also the preferred method in the construction of bridge box girders in mountainous areas. [0003] However, the one-time investment and treatment cost of the traditional full-wall support is high. When the construction load is added, the foundation may settle unevenly, resulting in varying d...

AI Technical Summary

Problems solved by technology

However, there are still many difficulties in the construction of super-high supports under complex and steep terrain conditions, such as the installation of super-high steel pipe columns, the lifting of pre-compressed soil bags, the construction of bottom caps, etc., which need further research

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