考虑土抗力的掏挖基础数值模拟及回归分析

Numerical simulation and regression analysis of undisturbed soil digged foundation considering soil resistance

随着送电线路工程大量采用掏挖基础及人工挖孔桩基础,原状土基础研究也越来越深入.《架空送电线路基础设计技术规定》对同样深度的掏挖基础和挖孔桩基础设计原则规定有很大的不同.因此,需要通过对掏挖基础与周围土体的耦合数值计算,探讨原状土基础的受力机理及土体抗力分布,从而更直观地反映掏挖基础与土体的相互作用.利用ANSYS平台建立参数化数值模型,得到相同地质条件不同柱长基础在考虑土抗力时的结果.对该类结果进行数学统计分析,并对不同的受力机制进行比较,总结得出露头、柱长和土抗力的关系,获得较为准确的基础受力分析数据,为规范的制定和实际工程设计提供依据.

Researches for undisturbed soil foundation have been deepened as digged foundation and manual excavation pile foundation being widely used in transmission line projects.However,regulation for designing digged foundation and pile foundation with the same depth is different in Technical regulation for designing foundation of overhead transmission line.Therefore,it is necessary to calculate coupling of digged foundation and soil around it to analyze stress mechanism of undisturbed soil foundation and distribut...