Assembled formwork support device for special-shaped concrete cavity

Abstract

The invention discloses a fabricated mold plate supporting device of a shaped concrete tunnel body. The fabricated mold plate supporting device comprises a plurality of lattice columns, one or more layers of plane truss beams are arranged on a square columnar support composed of all lattice columns in the height direction, and the plane truss beams include a plurality of transverse truss beams fixedly connected between two adjacent lattice columns and a plurality of longitudinal truss beams connected between two adjacent and parallel transverse truss beams; tension chord truss beams are fixedly installed between the lattice columns at the edge of the top end of the columnar support, the plane truss beams are installed at the top ends of the lattice columns located in the space enclosed byall tension chord truss beams, and the plane truss beams at the top ends of the lattice columns and the tension chord truss beams are fixedly connected through the transverse truss beams and the longitudinal truss beams; and a plurality of supporting mechanisms for supporting the side faces of mold plates are arranged on the two lines of the lattice columns which are parallel to the longitudinal truss beams and located at the outermost layer in the height direction.

Description

technical field [0001] The invention relates to the technical field of construction engineering, in particular to an assembled formwork support device for a special-shaped concrete cavity. Background technique [0002] In the construction of tunnel concrete engineering, structures such as subways, pipe galleries, and wind tunnel laboratories have large cross-sectional changes, and the constructed concrete tunnels have a large cross-sectional size, with a horizontal net width of more than 20 meters and a height of more than 20 meters. The entire length of the wind tunnel shrinks gradually, and each surface shrinks in a trapezoidal state along the longitudinal direction, belonging to a special-shaped concrete structure. Due to the large span and height, the weight of concrete slabs and beams is very large. The traditional support method is used for construction, and the steel support is heavy. It will make it impossible to use small equipment or manual installation and removal...

AI Technical Summary

Problems solved by technology

Due to the large span and height, the weight of concrete slabs and beams is very large. The traditional support method is used for construction, and the steel support is heavy, which will make it impossible to use small equipment or manual installation and removal, and the installation accuracy is extremely high.

[0003] Although segmental construction can be adopted, the cave is in a closed state, and the feasibility of lifting the internal support system by machinery is extremely low, and the installation accuracy is not easy to control. Large changes, various sizes of supporting rods and formwork, extremely low reuse rate, high formwork rigidity required, and high cost

After the concrete reaches its age, the internal support system is removed by mechanical dragging and heavy tonnage support, which is likely to cause surface damage to the inner wall of the structure

[0004] Invention patent CN107965068A discloses a cold-formed thin-walled steel composite wall diagonal brace and keel frame connection structure, which improves the shear bearing capacity and ductility of the cold-formed thin-walled steel composite wall, and improves the energy dissipation capacity of the wall. The overall structure is easy to disassemble and replace, and the degree of assembly is relatively high; however, the recycling rate of the materials used in the support system is low, and it is not suitable for large-scale and large-volume projects, which will cause material waste and high cost, and the assembly steps are complicated. It requires a large number of components to be manufactured, which is likely to cause errors in the component processing stage, thus failing to meet the assembly accuracy requirements, and a large number of popularization and applications are limited

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