Layout And Optimzation For Circular Strut System In Retaining And Protection Of Excavations

With the rapid economic development of our country in recent years, and the accelerating urbanization, Underground space utilization rate also increased significantly, urban land increasingly nervous, At the same time, the influence on surrounding environment in foundation pit engineering control standards, requirements of more and more is also high. The proportion of retaining structure accounts for the proportion of all supporting types more and more in retaining and protection of excavations, with the support of foundation pit supporting system is one of the most common,it can be the most effective control the deformation of surrounding environment, and to make the most use of land for construction. The circular strut system is the most common support arrangement, unreasonable circular strut system arrangement likely to lead to the emergence of a series of safety problems, so, it is necessary for the circular strut system for research.Based on the foundation pit supporting circular strut system as the research object, the purpose is to summarize about circular support deformation law, layout and optimization of foundation pit engineering experience, to guide the future practical engineering application. The main work including the case investigation for different decorate a form of circular strut system. Through the collection data, simulation calculation, Analyzed different plane shape circular strut system under uniform load deformation characteristics. The causes of asymmetric load are listed, when asymmetric load, Arrangement of different circular strut system deformation analysis comparison, according to the result of simulation analysis and calculation, it is concluded that under asymmetrical loading circular strut system deformation characteristics. After the master the characteristics, cases of four kinds of typical asymmetric load circular strut system and optimization to the layout of the theoretical calculation and analysis.In the last part of article, the purpose of the clarified the optimal placement of the circular strut system, with some cases the actual optimization design of circular strut system. Cases not only reflect the level of optimization support arrangement design foundation pit bracing member internal force and deformation should be considered reasonable, also consider the construction sequence, construction period, convenience,the project cost factors, and other factors.This research needs computing simulation software mainly includes Qimstar BSC?ABAQUS,etc...