Numerical Simulation Analysis On Foundation Pit Supporting Structure Of Penglong International Building

Along with the acceleration of urbanization construction speed in our country,underground engineering especially foundation pit engineering has become one of the most important urban development and common work, however, the city buildings densely populated and environment is complex, it will be more difficult to make a scientific and economical completion of excavation to achieve the desired effect. There is much more room for progress on how to solve the problem of foundation pit is more reasonable. How to make a foundation pit engineering more reasonable, and maximize the safety and economic benefits.First we should understand the nature of the foundation pit engineering, accumulate experience in practice and found the internal law.The artical design the support structure on the basis of its analysis of engineering geological conditions, based on Penglong international building foundation pit as the research background, analyze its stability. Under the premise that the scheme is feasible, using the FLAC3 D software to simulate the changes of stress and strain in the process of the foundation pit excavation and supporting. Come to the conclusion of stress, displacement, axial force and deformation of the supporting structure. The foundation pit largest settlement is about 5.2mm,the pit maximum uplift is about 22 mm, the largest displacement of soil is about 15 mm,supporting piles maximum horizontal displacement is about 8.2mm, all of these meet regulatory requirements, shows the foundation pit is safe and stable under the support in the form. On this basis, analyze the results of simulation and concluded the trend of stress and strain in the pit under the form of pile and soil nailing combined support. Finally, analyze the monitoring deta, and the observation deta were compared with simulated deta. Found the two is consistent with the overall, and analyze the causes of the difference between the two deta,obtained the objective laws.Based on the Penglong international building foundation pit as an example, I hope thearticle can be a reference for the similar engineering, especially the study of piles and soil nailing pit wall combined support form, and accumulated some practical experience for foundation pit engineering research in the future.