Side span cast-in-place section construction structure based on hanging basket and truss-type guide beam and construction method

Abstract

The invention discloses a side span cast-in-place section construction structure based on a hanging basket and a truss-type guide beam and a construction method. The construction structure comprises the hanging basket, a hanging basket front cross beam, a hanging basket rear cross beam, a truss-type guide beam system, a side formwork system, a pre-ballasting system and a balance weight system; the truss-type guide beam system comprises unit trusses and a bottom formwork arranged above the unit trusses, each unit truss comprises an upper chord member, a lower chord member and a connecting web member, each connecting web member is composed of multiple vertical web members and oblique web members, and one vertical web member is arranged between each two corresponding adjacent oblique web members; the bottom formwork comprises multiple main distribution beams crossing above the unit trusses, a square timber is arranged between each two adjacent main distribution beams, and bamboo plywood is paved above the square timbers and the main distribution beams. Through the construction structure, the technical problems of low safety, high construction difficulty coefficient when encountering poor terrain, long construction period and high construction cost caused by a support method are effectively avoided.

Description

technical field [0001] The invention belongs to the construction field of continuous rigid frame bridges, and in particular relates to a side-span cast-in-place section construction structure and construction method based on hanging baskets and truss-type guide beams. Background technique [0002] The beam body of a continuous rigid frame bridge is divided according to the construction site, including the cast-in-place section at the top of the pier, the cast-in-place section at the top of the pier, the cast-in-place section at the side span, and the closing section. Hanging baskets are installed on the pouring section, and the cantilever section is constructed with symmetrical cantilever. Before the construction of the cantilever section is completed, the construction of the side span cantilever section is completed, and finally the closing section is constructed. The side-span cast-in-place section is a part of the beam structure and is located at both ends of the continuo...

AI Technical Summary

Problems solved by technology

During construction, a bracket must be erected, and the beam body of this section shall be constructed on it. After the closing section is completed, the beam body of each section shall form a whole before the bracket can be removed. The following disadvantages exist in the construction of the bracket method: 1. When the side span When the cast-in-place section is higher than the ground, it is dangerous to erect the support, and more materials are used, which increases the construction cost; For balance, it is necessary to counterweight on the other side or add a pull-down device, which increases the difficulty of construction; 3. If the side span is on a hillside with poor terrain, the excavation area is large and the damage to the ground surface is large. At the same time, the construction platform is difficult to construct Big

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