Large Building Overhead Installation Control Surveying

Abstract

In the process of urbanization, along with a high degree of integration of the intensification of land use and urban architecture function, many large-scale large buildings have appeared which have enormous architectural space and the structure is complex. They are the city's landmarks and are the import integration of urban functions and landscape. During the construction of complex steel structure the high altitude installation need high demand to control surveying. It requires not only the surveying accuracy, precision, but also high surveying techniques on the spatial structure of three-dimensional positioning, docking, and assembly. Conventional planar and high level processing surveying mode cannot meet the construction needs. In this paper the arched surface steel roof truss high altitude installation project of China Tianjin West Railway Station is researched which has north-south length of 394 meters and east to west span 126 meters. The research aims to establish an accuracy of high three-dimensional surveying control network. This paper presents a specific implementation method of control surveying. And though data processing, accuracy evaluation and the analysis of engineering applications results, we verify the correctness of the method. This method support spatial location and geometric characteristics for arched surface of steel roof truss high attitude installation. It ensures the project successfully implemented.