Full Support Key Construction Technology Of Cast Girder In Mountain City

Cast support construction method is a commonly used construction method, generally used for simple beam bridge, pier lower, small-span continuous girder bridge. With the emergence of new types of steel frame, cast support technology is widely adopted in across the road and general river bridge, construction of Interchange group, curved bridge, skew bridge. However, because the whole construction process of the full support lack of knowledge, resulting in many problems. Comprehensive improvement project of Jia Bin Lu extension in this paper, support casting construction for the study, established dimension finite element model by Midas, study influence factors of the structural stability during the construction process, and discuss various quality and security measures of the construction process.First, review the application and the current research of support construction methods, explain the various problems in support construction, focuses on the construction features and key construction technology of bowl fasten support.Second, describe structural stability and critical loads research methods of the bowl button support, detailing destruction of structural instability, failure type and static method, energy method of the structure critical load. Establish the finite element model on the most disadvantaged segments of the bowl button support in the actual project, through the comparative analysis of the strength and stability under non-brace and brace both cases of the most disadvantaged support segment. Brace can effectively reduce stress of the vertical pipe by comparing; but also can improve the stability of support structure. To set of braces provide a basis in the process of support design for engineers.Finally, discuss the construction safety precautions of the various components of the system in the full support construction process, propose a series of measures to ensure safety and quality construction, effectively improve the quality and safety of the construction project.