Method for installing a large-span cylindrical reticulated shell

Abstract

A method of construction and installation of a large-span cylindrical reticulated shell comprises: installing a mother vault on the ground by a bulk method; pushing the mother vault gradually during the installation, so as to be match with a lifting device for lifting the extension tail end of the mother vault; adjusting the height of the extension tail end to allow the extension tail end to be maintained at a ground level for ground installation construction; and after the installation of the mother vault is completed, using a high-altitude overhanging construction method to install the other reticulated vaults adjacent to the mother vault, respectively, in sequence along the axial extending direction of the mother vault until the completion of installation of the entire large-span cylindrical reticulated shell is completed.

1 . A method for installing a large-span cylindrical reticulated shell, comprising:
 A) the large-span cylindrical reticulated shell is divided into a plurality of axially arranged reticulated vaults according to the supporting conditions, and each reticulated vault at least comprises four support bases symmetrically arranged on both sides of the reticulated vault and ball joints and pull rods which are respectively installed on the four support bases and mutually connected into a net frame shape; firstly, a reticulated vault is installed and called as a mother vault, a rotatable ball joint is respectively installed on the support base on any side of the mother vault, and then other ball joints and pull rods on the mother vault are respectively installed in sequence by taking the rotatable ball joint as the starting point; the mother vault which should be installed in a vertical high-altitude extending manner is installed in a transverse extending manner during the installation of the ball joints and the pull rods, and a lifting device is used for lifting the extension tail end of the mother vault during the transverse extending process of the mother vault, so that the height of the extension tail end always meets the recruitment of ground installation construction;   B) after the completion of connection between all the ball joints and pull rods on the mother vault, the ball joint in the symmetrical position of the rotatable ball joint is fixed on the support base in the corresponding position, i.e., the installation of the entire mother vault is completed; a high-altitude overhanging method is adopted for construction after the completion of installation of the mother vault, and other reticulated vaults adjacent to the mother vault are respectively installed in sequence along the axial extending direction of the mother vault until the completion of installation of the entire large-span cylindrical reticulated shell.   
     
     
         2 . A method for installing a large-span cylindrical reticulated shell according to  claim 1 , wherein, the rotatable ball joint is rotatably installed on the support base during the installation of the mother vault; the rotatable ball joint is fixed with the support base after the completion of installation of the reticulated vaults and before the completion of installation of the entire large-span cylindrical reticulated shell. 
     
     
         3 . A method for installing a vault of a large-span cylindrical reticulated shell, comprising:
 installing a rotatable ball joint on a support base; and   taking the rotatable ball joint as a starting point, installing a plurality of fixed ball joints and a plurality of pull rods in sequence,   wherein the vault is installed in a transverse extending manner during the installation of the ball joints and the pull rods, and a lifting device lifts an extension tail end of the vault during the transverse extending process of the vault, so that a height of the extension tail end is maintained at a ground level to allow ground installation construction.