Reliability Analysis Of The Rearing Capacity Of Prestressed Pipe Pile (PHC) Foundation

Prestressed concrete pipe pile foundation is closely connected with the rock mass in the soil.The rock mass on the supporting force of the pile, the pile material and the nature of the rockmass determines the vertical bearing capacity of pile foundation. So, to consider the reliability ofthe prestressed pipe pile foundation must take into account the spatial variability of rock and soil.In this thesis, it introduces soil profile of the random field model and its associated theory,discusses the concept of related distance and variance reduction function and the relationshipbetween the two concepts, and summarizes the computational methods of the related distance.According to215static cone penetration test curves of Tianjin, calculate vertical related distanceand horizontal related distance of soil by method of spatial average. Geotechnical survey data arecollected from three projects of Tianjin (Renxin development zone, Tianjin FAW Toyota MotorCo., Ltd., Test pile item of FAW Toyota) and extracted and organized. Statistics thecorresponding soil layer around the test piles. According to144complete test pile data, statisticthe vertical bearing capacity value of the test pile, analyze the ratio of the experimental andcalculated values of vertical bearing capacity, and determine statistical parameters. Establish thelimit state equation of the pile reliability analysis, work out calculation proced ures of JC method,calculate reliability index of vertical bearing capacity and analyze calculation results. Builddifferent venues’ models of Tianjin area. In the model, the foundation is single prestressed pipepile foundation. According to the pipe pile foundation model, analyze the displacement responseof the pile and the bending moment distribution under the earthquake.