A method for installing large-span double-layer cylindrical reticulated shells

Abstract

An installation method for a large-span double-layer cylindrical surface net shell includes the steps that firstly, three grids of rod pieces, spherical joints and an upper portion maintenance structure are installed at the center line position of a net frame, two rows of pull rods are arranged on the two sides of the installed three-grid net frame, lifting devices are arranged at the top ends of the pull rods, steel strands of the lifting devices are connected with the outer side upper chord spherical joints of the installed net frame, and the lifting devices are started; after the installed net frame is lifted to a certain height, a next grid part of the net frame and an upper portion maintenance structure continue to be installed, lifting continues after installation is completed, a next grid part of the net frame and an upper portion maintenance structure are installed, a support is fixed finally, and a maintenance structure of a last part is installed. No scaffold or large-tonnage crane is needed, only small-tonnage cranes or small-tonnage auxiliary lifting devices are needed, all work is carried out on the ground, and thus the installation method for the large-span double-layer cylindrical surface net shell has the advantages that operation is easy, cost is low, and the construction period is short.

Description

technical field [0001] The invention belongs to the technical field of building structure installation methods, in particular to a method for installing a large-span double-layer cylindrical reticulated shell. Background technique [0002] As our country pays more and more attention to environmental issues, there are more and more demands in the market for canopies with large span, high vertical height, low cost and short construction period. After years of research and application, it has been found that the double-layer cylindrical reticulated shell structure is the most suitable structural form. Currently, the commonly used installation methods in the market are the scaffolding method (commonly known as "full house") and the loose-fitting method in the air. Among them, the scaffolding method needs to build scaffolding in the entire construction coverage area. This method requires a lot of manpower, material resources and financial resources in the early stage. The scaffol...

AI Technical Summary

Problems solved by technology

Among them, the scaffolding method needs to build scaffolding in the entire construction coverage area. This method requires a lot of manpower, material resources and financial resources in the early stage. The scaffolding is prone to rust and bending during repeated use, which affects the reliability of the scaffolding. , so it is easy to cause safety hazards when working at heights

The aerial loose splicing method requires a large number of large-tonnage cranes, and needs to install grid members and nodes one by one. This method has a long construction period, high crane usage costs, and limited crane installation site and requires a large open area. Moreover, several cranes need to cooperate closely, so the requirements for the professional level of the crane drivers are relatively strict.

In addition, both of the above two methods need to spend a certain amount of man-hours to install and maintain the structure after the grid is installed.

Images