Construction And Monitoring Analysis Of Enclosing Pile Enclosure Structure In Deep Foundation

With the development of urbanization and underground engineering,the tendency of deeper and larger foundation pit has become inevitable.The current hot issues are mainly focused on the research of new forms of foundation pit.As for the type of foundation pit,the most fundamental requirements include security,economy and reasonableness.Lock pile is one of the new types in retaining structure.A.Based on the investigation of slope harnessing engineering using drilling occlusive piles in a large amount of surrounding areas at home.In this paper,taking deep foundation pit by using occlusal pile in Gansu province as an example,the advantage of occlusal pile in loess area was analyzed with the aid of monitoring and numerical simulation,combined with the construction process of occlusal pile.This main contents are as followed:(1)The finite element analysis model was established,combined with provided design program.(2)Combined with the results of on-site monitoring,study the occlusal pile support structure and the surrounding environment of the displacement of the pit.A.The horizontal displacement of the supporting pile in the occlusal pile is monitored and analyzed,and the variation law is summarized and its safety is evaluated.B.Aiming at the complicated environment around the foundation pit,the settlement of the soil around the foundation pit is fully monitored and analyzed,and its safety is evaluated synthetically.C.The underground pit and other buildings of the settlement displacement monitoring and analysis,to study the changes in the law and its safety evaluation.D.The axial force of the anchor is monitored and analyzed,and the variation law is studied.(3)The numerical model of foundation supporting structure is established by using large-scale finite element software ADINA,the model is used to analyze the displacement of the supporting pile and the surrounding environment of the foundation pit during the excavation of the foundation pit,and the results are compared with the measured results,which proves that the numerical simulation method is of reference significance.