中南大学学报（自然科学版）Issue(5)：1832-1837,6.DOI:10.11817/j.issn.1672-7207.2015.05.035
等截面圆形灌注桩静载Q-S曲线复合对数模型
Composite logarithmic model for static load-settlement curve of cast-in-place single pile with uniform-circular cross section
摘要
Abstract
According to field tested data, mathematical property of the static load−settlement curve (Q−S curve) of cast-in-place pile with uniform-circular cross section (UCSC pile) was summarized, and X-shape fitted error of traditional hyperbolic model was analyzed. The three-parameter composite logarithmic model for UCSC pile’sQ−S curve was presented, which is characterized by going through point, monotone increasing, convex and up limited function. The fitted values of field investigated static loading data of many UCSC piles were compared with the measured values. The results show that the composite logarithmic model can minimize the X-shape fitted errors caused by hyperbolic model. The presented fittings are in agreement with the investigated UCSC pile’sQ−S curves. The presented model can precisely predict the end part of theQ−S curve of UCSC pile after fitting its initial part, which is helpful to determining bearing capacity of UCSC pile in static load test.关键词
桩基础/UCSC桩/Q-S曲线/承载力/复合对数模型Key words
pile foundation/UCSC pile/Q-S curve/bearing capacity/composite logarithmic model分类
建筑与水利引用本文复制引用
王伟,卢廷浩,池旭超..等截面圆形灌注桩静载Q-S曲线复合对数模型[J].中南大学学报（自然科学版）,2015,(5):1832-1837,6.基金项目
国家自然科学基金资助项目(41202222)；河海大学岩土力学与堤坝工程教育部重点实验室开放基金资助项目(GH201102)；住房与城乡建设部研究开发项目(2012-k3-4)；浙江省科技厅公益性技术应用研究计划(2012C23063,2012C21009)；绍兴市公益性技术应用研究计划(2012B70022)@@@@(Project (41202222) supported by the National Natural Science Foundation of China （41202222）
Project (GH201102) supported by the Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University （GH201102）
Project(2012-k3-4) supported by the Ministry of Housing and Urban-Rural Development of China （2012-k3-4）
Projects(2012C23063,2012C21009) supported by the Science Technology Department of Zhejiang Province （2012C23063,2012C21009）
Project(2012B70022) supported by the Science Technology Bureau of Shaoxing City) （2012B70022）
