Study On The Vertical Bearing Capacity Characteristics Of Dig-Pouring Pile In Lossess Area Of Guan Zhong

Due to the special historical origin, loess of Guanzhong has the special project nature. As one kind of effective underlying form, the pile foundationundoubtedly has the important meaning of application and project character research in this area. The vertical bearing capacity and subsidence of dig-pouring pile has been the focus of the study. Based on the reasonable theory basis, making appropriate calculation method of bearing capacity and subsidence of sing pile is especially important. Therefore, this paper combines static load test of Yongshou to Xianyang Airport Expressway overpass, has conducted a serious-minded research to the relevant characteristics of dig-pouring pile bearing capacity which is located in loess area of Guanzhong. Based on the analysis in the test, further the modified analytic solution of pile load-subsidence relations is deduced, ANSYS finite element analysis software is used to make numerical simulation, and the conclusion are listed as follows:1. The vertical bearing load transmission character of three test pile which is JCS1,JCS2,and JCS3 around immersion is studied. Including the distributed characteristic of pile shaft axle strength, the display character of pile side friction, and tip of pile resistance, as well as the limit bearing capacity's determination, further strength character around immersion is analyzed and contrasted.2. On the basis of research findings by predecessors, by rational simplification, load-settlement relation's analytical solution of single pile which is dig-pouring pile in homogeneous soil is entailed, the parameters in revised load transfer function of Wu Satoh and the parameter in winkler foundation model that is used to calculated pile end settlement are discussed and determined. The entailed analytical solution in this paper is used to calculated and obtained load settlement graph, which is comparing with experiment value.3. ANSYS finite element analysis software is used to build model, and further explores the load transfer rule of single pile, then load settlement graph which is on the top of pile is obtained, then it is used to contrast with the value of static load test and the theoretical value, so the feasibility of the entailed analytical solution in this paper is verified.