Stability Analysis On Deep Foundation Pit Support Of Hefei Chuangxindadao Station Rail Transit Line2

Nowadays,the subway plays an crucial role on the daily life of the residents travel, urban layout and even the social environment with the rapid development of urban economy. Since 2009, Hefei has commenced underground engineering a new page. And it plans to achieve the full 12 tracks parallel the situation in the 2020 s.As the basis for the metro station,deep foundation is close to the economic and social benefits of the excavation. In addition, the most important issue of the subway construction is about the structural stability of the subway station.Hefei city's development of traffic construction is at the peak. With the planned subway, deep excavation is common. With the planning of subway No.1 and No.2,deep foundation pit engineering is common.Among them,foundation pit shelter provides space for earth excavation, the construction of underground structure and controls the bad influence caused by earth excavation and the construction of underground structure.Take the deep excavation of Hefei Chuangxindadao Station rail transit line2 as the background to simulate the support in the main structure of actual work in order to analysis the stability of the pit.There are many influence factors on foundation deformation,such as basic mechanic parameter of earth,strain of preinstalled bolster and continuous wall.Associating the theoretical estimated methods on the stability of deep foundation pit home and abroad,using Midas GTS manipulates the stability of continuous wall of the engineering and studies the following key questions:Summarizing the current study situation of stability theory and numerical methods of the development of deep foundation home and abroad.Analyze the changes of deformation and strain during the excavation and enclosure of deep foundation pit theoretically.Using Midas GTS software to analyze the concrete working condition during different construction steps,observing the rules of foundation's deformation and strain under different working conditions by extracting results.The accurate numerical simulation is the prerequisite of the study of stability.Sorting out the results of numerical simulation,modeling the type of 1 and 2support and observing the deformation to judge the practicability of other types.Analyze other possible factors on deep foundation pit enclosure stability.As for the models built for numerical simulation,the magnitude of deformation and displacement should contrast to the requirement of the surrounding environment's protection.