Application And Research Of Pile-anchor Supporting Structure In Deep Foundation Pit Engineering

With the development of urban construction and growing scale of high buildings,subway projects, municipal projects and exploitation of underground space, foundation pit engineering has developed rapidly and foundation pit depths have been increasing. Due to the advantages in better adaptability in engineering and reasonable price, Pile-anchor Supporting Structure has been widely used in important supporting structures. However, because of the characteristics of foundation pit and limitation of theory of computation,the theoretical study lags behind engineering practice. Empirical design method plays an important role in Foundation Pit Supporting Structure. Based on what has been mentioned above, the focuses of this dissertation are as follows:1. Combined with the characteristics of the the pile anchor supporting structure system, this paper introduces the significance and research status of the pile anchor supporting structure.2. With the basic concepts of Pile-anchor Supporting Structure system as a starting point,this paper expounds the construction characteristics and structural types of Pile-anchor Supporting Structure and discusses its working mechanism and applicable engineering environment.3. Through the analysis and discussion on the design method,this paper determines the calculation method and theory, and illustrates the identification of relevant parameters and significance and the modeling method.4. Based on engineering example of Pile-anchor Supporting Structure, this paper covers the introduction of construction technology of pile anchor supporting structure and illustration of its optimization and modification.5. Based on engineering examples and Simulation and Analysis by FLAC3D, this paper discusses the stress state and deformation of Pile-anchor Supporting Structure and summarizes its variation rules under Space effect6. Based on engineering examples,the author did tests and supervision on construction site. This paper discusses stress state and deformation of Pile-anchor Supporting Structure in engineering practice,compares with the results of the Simulation and Analysis, and summarizes its Space effect in real situation.