Three large steel pipe pile test piles and large steel pipe pile bearing capacity of

Abstract: In recent years, in large deep-water port terminal, the Bridge Project, a large open steel pipe pile has been more widely used. Large open steel pipe pile bearing capacity, standardize the lack of empirical parameters and empirical formula, difficult to provide the basis for the design bearing capacity calculation of pile bearing capacity required by the test pile to determine. On the open waters of adverse sea conditions, the large steel pipe pile test pile project management and control, the lack of successful experience can learn from. Yangshan three large steel pipe pile test pile for large Steel pipe pile test pile own characteristics, combined with harsh working conditions, complicated geological conditions, the construction control requirements, through systems analysis and planning, construction control and test control key and put forward the countermeasures to ensure the success of the three large steel pipe pile test pile. This article summarizes the Yangshan three large steel pipe pile test pile successful experience, the practice has a significant reference for similar test piling works. Based on the results of the the Yangshan three large steel pipe pile test pile obtained, combined with the specifications and similar test pile of documents, large open steel pipe pile bearing mechanism and bearing capacity to conduct research to draw large open steel pipe pile ultimate bearing capacity calculated empirical formula. According to the empirical formula of this article compared to the large open steel pipe pile ultimate bearing capacity with the measured values, 0 to 15% smaller than the measured bearing capacity, while the specification formula of building pile foundations, even without considering the open steel pipe pile diameter increases piles of soil effect factor λs and the occlusion effect coefficient λp reduction, using the specification maximum pile diameter 1000mm steel pipe pile λs and λp value calculation about 15% smaller than on the empirical formula of this article, the error in the 15 to 25% room. The large opening of the bearing capacity of steel pipe pile to calculate the empirical formula is consistent with the actual situation, security studies in this article and can meet the needs of the project carrying capacity estimates. The test pile results of pile for follow-up engineering analysis and high strain dynamic testing results to the analysis of two post-evaluation. The analysis OCTG - results show that the match works Pile Driving and dynamic test results and conclusions of the test pile. The Yangshan three pile test of success, for the design and construction to provide a reliable basis, to ensure the smooth implementation of the three projects. Engineering management experience, the Yangshan three test pile, the pile test results and this article on the large open steel pipe pile of research findings funded a similar project draws on, and for reference in the code revision of pile foundation.
Key words: open steel pipe pile bearing capacity of pile test occlusion effect of soil compaction effect ASTM pipe
[Degree-granting units]: Tsinghua University
[Degree levels: Master
[Degree-granting Year: 2009
【Key Words】: TU473.1