Study On The Applicability Of Locked Steel Pile In Construction Of Deep Foundation Pit Enclosure Project

With the continuous development of the construction industry,the pace of technical update in the construction field is accelerating,and all kinds of new technologies and new techniques are continuously developing and progressing.At the same time,people have put forward higher requirements for the development of the construction industry with high speed and high quality.This paper mainly studies and analyzes the applicability of a new type of steel pipe pile retaining structure system in a deep foundation pit retaining engineering,because the retaining structure system has the concept of energy saving,environmental protection and low-carbon green construction,and discusses the purpose and significance of its research in the deep foundation pit retaining structure project.By referring to relevant literature review,this paper analyzes and finds out the factors that affect the selection of deep foundation pit support structure system,and establishes the initial index of the selection of deep foundation pit support structure system on this basis.By Delphi method on the index system of the initial screening and optimization,using the analytic hierarchy process(ahp)analysis and determine the weight of each evaluation index,by applying the theory of fuzzy comprehensive evaluation of a deep foundation pit project alternative evaluation,compares the three kinds of supporting structure system by using value engineering theory comparison conclusion confirmed.Finally,the locking steel tube pile support structure system is determined as the optimal scheme.This paper analyzes the social and economic benefits of the locking steel pipe pile through its application in the whole deep foundation pit retaining project,and obtains good results.It has certain guiding and exploring significance for the wider and better application of the locking steel pipe pile in the deep foundation pit retaining project in the future.