Research On Bridge Pile Foundation Vertical Supporting Capacity

In this paper, the focus of National Highway Rongcheng to Wuhai line Qingdao expressway Habitat Medium Bridge 2 single vertical bearing capacity of pile foundation as a research topic, Rong Wu lines are part of North China platform, the starting point is located in Yishu fault zone the northern section, belong to Jiaobei Weifang fault block uplift and faulted zones, according to geological information, select a representative of this article, the distribution of soft layers thick K6 +703 Units in Bridge on the 4th and K8 +778 Units in Bridge on the 5th test, vertical bearing capacity of pile foundation study of the changes. Specific tests are carried out through the test pile load test at the scene, using planted in each test pile on different sections of the steel stress reflects the pile axial force and pile pressure on the relevant data, through the treatment of test data analysis, access to different types of different pile length of the actual bearing capacity of piles and pile foundation made or broken soil to reach the relevant data to determine the ultimate bearing capacity of pile foundation and settlement of the relationship between the optimum design for the project to provide reliable basis.Pile foundation at the Department produced a downward shift in the process of pile foundation of lateral friction resistance also comes increased resistance at the bottom of pile further play, when the pile foundation to maximize the lateral frictional resistance, all the load will be met by the End bearing pile foundation, if loads continue to increase at this time, then, because of the foundation pile has reached the maximum displacement, the lateral frictional resistance at this time and even has most of the vast majority will go to the ends of pile foundation, client Ministry of great force, the problem of pile foundation came into being.