水利水电科技进展2013，Vol.33Issue(1)：27-32,6.DOI:10.3880/j.issn.1006-7647.2013.01.006
岩溶地基中超长桩承载力数值计算方法
Method for calculating bearing capacity of super-long pile in Karst region
摘要
Abstract
According to complex foundations including channeling and Karat caves in a Karst region, a new method for calculating the bearing capacity of a super-long pile was presented. First, a calculation model of pile lateral friction in Karst stratum was established. Second, energy balance equations of a super-long pile in non-Karst stratum and Karst stratum were deduced, respectively. Based on it, a displacement formula and axial force formula of the pile unit were determined. Third, the pile incremental potential energy formula was derived from the principle of minimum potential energy, with the golden section method as program convergence algorithm. At last, taking an engineering pile in the Zishui Bridge foundation as an example, the bearing capacity was calculated using the method proposed in this paper. Calculation results show that this method is reasonable and practicable, and can provide a scientific reference for research and design in actual projects.关键词
超长灌注桩/岩溶地区/承载力/数值计算/最小势能原理Key words
super-long pile/ Karst region/ bearing capacity/ numerical calculation/ minimum potential energy principle分类
建筑与水利引用本文复制引用
刘思思,江学良,李珍玉..岩溶地基中超长桩承载力数值计算方法[J].水利水电科技进展,2013,33(1):27-32,6.基金项目
国家自然科学基金(51108470) （51108470）
湖南省科技计划(2011TT2061) （2011TT2061）
