摘要
针对岩溶地区特殊地质条件下,岩溶洞穴对高速公路桥台桩基承载力的影响,采用三维有限元数值模拟敏感性分析的研究方法,分别对影响嵌岩桩承载力的岩溶洞穴与桩基相对几何形态(桩端至洞穴顶部厚度、洞穴直径、高程和偏心)等四大影响因素进行正交数值试验研究,对不同洞穴条件下其对桩基承载力的影响作了详细分析,进而提出了岩溶地区桩基承载力设计中应予以考虑修正参数。
With the aim of the effect of cavern on the bearing capacity of rock-socketed piles of highway in special geological conditions in Karst cavern areas, the three dimensional finite element numerical simulation analysis method is adopted to carry out numerical testing research on orthogonal tests of 4 major influencing factors including the relative geometric morphology of influencing the bearing capacity of rocksocketed piles of Karst cavern and pile foundations（ the thickness of pile end to cavern top, cavern dimeter, altitude and the eccentric center of caven） respectively. In addition, detailed analysis on bearing capacity of pile foundations and friction of pile side under different Karst geological conditions are carried out and revised parameters for bearing capacity of pile foundations in cavernous bedrock in Karst areas are provided in design.
出处
《西安理工大学学报》
CAS
北大核心
2010年第1期31-36,共6页
Journal of Xi'an University of Technology
基金
国家西部交通科研项目(2002-318-000)
2002年高等学校博士学科点专项科研资助项目(20020183061)
关键词
岩溶洞穴
嵌岩桩
承载力
正交试验
敏感性分析
the cavern of Karst
rock-socketed piles
bearing capability
orthogonal test
sensitivity analysis
