Cylindrical latticed mesh mounting method for erecting keels via symmetric method

Abstract

The invention relates to mounting of steel frame structures and is intended to provide a cylindrical latticed mesh mounting method for erecting keels via a symmetric method; an arch keel is divided into a midspan keel segment in the middle and support keel segments arranged symmetrically on two sides; the support keel segments on two sides are assembled first, vertical supports are used for supporting, and a hawser cable is provided; the midspan keel segment is assembled on a ground and is then lifted and connected to the support keel segments on two sides; after a latticed shell unit is assembled on the ground, keel structures are used as mother structures to continuously mount the latticed shell unit, and a cylindrical latticed shell is finally formed. Symmetric segmenting, symmetric mounting and internal force self-balance are employed in the mounting process. Setting up a large-sized temporary construction support is not required, and the safety risk of the large-sized temporary construction support is eliminated. Large-sized lifting equipment is just required in the short time of a start phase, and using small lifting equipment to assemble a latticed shell unit is required only after the keels are finished; a construction face is wide, and related arts can be performed alternately to save construction period.

Description

technical field [0001] The invention relates to the installation of a steel frame structure, in particular to a method for installing a cylindrical reticulated shell with dragon tendons in a symmetrical method. Background technique [0002] The reticulated shell is a space bar structure similar to the flat grid. It is based on bars, forms a grid according to certain rules, and is a space frame arranged according to the shell structure. It has the properties of bar systems and shells. The characteristic of its force transmission is mainly to transmit force point by point through the tension, pressure or shear force in two directions in the shell. This structure is a spatial structure that has attracted much attention at home and abroad and has broad development prospects. The reticulated shell structure combines the main characteristics of the rod structure and the thin shell structure, and the force is reasonable, and it can span a large span. It has a beautiful architectu...

AI Technical Summary

Problems solved by technology

Among them, the overall sliding or jacking method requires synchronous control, and a large construction platform is required for assembly; the sliding support method requires the use of a support frame, which has high requirements for stability and has greater risks; the local lifting method requires large-scale equipment. There are many splicing high-altitude sub-blocks, and the installation and quality risks are relatively large; the method of raising the mother arch on one side requires the lifting equipment to work for a long time with heavy loads. Due to the small number of lifting points, the lifting capacity is large, the internal force of the structure installation stage is large, and the safety and quality risks are at risk. Big

Images