硬壳层软土地基竖向附加应力分布研究

长江科学院院报 ›› 2011, Vol. 28 ›› Issue (5): 42-45.

硬壳层软土地基竖向附加应力分布研究

张军辉，江伟唯，郑健龙

长沙理工大学　公路工程教育部重点实验室，长沙 410004

出版日期:2011-05-01 发布日期:2012-11-02

Vertical Additional Stress of Soft Soil Foundation with Upper Crust

ZHANG Jun-hui, JIANG Wei-wei, ZHENG Jian-long

Key Laboratory of Highway Engineering of Ministry of Education,Changsha University of Science & Technology, Changsha 410004, China

Online:2011-05-01 Published:2012-11-02

摘要/Abstract

摘要： 采用有限元法对条形均布荷载作用下硬壳层软土地基竖向附加应力进行数值模拟，得到了不同厚宽比及模量比时层间竖向附加应力系数，编制了表格以便查询；通过二元回归分析得到了厚宽比、模量比与层间竖向附加应力系数的近似函数关系；结合“等效深度”概念，推导了一个硬壳层软土地基竖向附加应力分布的计算公式，并通过实例验证了计算公式的有效性。

关键词: 硬壳层 , 软土地基 , 竖向附加应力 , 沉降 , 二元回归分析

Abstract: The distribution of vertical additional stress of soft soil foundation with upper hard crust under uniform strip load is numerically simulated by finite element method. Through the simulation, the coefficients of interlayer vertical additional stress with different ratios of crust thickness to load width and ratios of crust modulus to soft soil modulus are obtained, and tables with these coefficients are given for reference. Furthermore, an approximate function of these coefficients versus ratio of crust thickness to load width and ratio of crust modulus to soft soil is presented using binary regression analysis. Finally, a calculation formula for vertical stress of soft soil foundation with upper hard crust is deduced based on the concept of equivalent depth, and the validity of this formula is verified by case calculation.

Key words: crust , soft soil foundation, , vertical additional stress , settlement, , binary regression analysis

中图分类号:

TU431

张军辉，江伟唯，郑健龙. 硬壳层软土地基竖向附加应力分布研究[J]. 长江科学院院报, 2011, 28(5): 42-45.

ZHANG Jun-hui, JIANG Wei-wei, ZHENG Jian-long. Vertical Additional Stress of Soft Soil Foundation with Upper Crust [J]. JOURNAL OF YANGTZE RIVER SCIENTIFIC RESEARCH INSTI, 2011, 28(5): 42-45.