软土地基路堤临界填筑高度改进计算方法  

Improved calculation method of critical filling height of embankment on soft ground

作　　者：朱福[1,2] 佴磊[1] 战高峰[1,2] 王静[2] 

机构地区：[1]吉林大学建设工程学院,长春130026 [2]吉林建筑大学交通科学与工程学院,长春130118

出　　处：《吉林大学学报（工学版）》2015年第2期389-393,共5页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(51308256);吉林省交通运输科技计划项目(2011103;2012-4-1-9)

摘　　要：基于统一强度理论,考虑软土地基固结、中间主应力、静止侧压力系数对地基承载力的影响,推导出软土地基承载力计算公式,并应用于软土地区铁路路基填筑高度计算中,提出一种路堤临界填筑高度计算方法。用铁路工程路基填筑实例进行了验证,计算结果与工程试验结果吻合较好,可以为推算各阶段软土地区铁路工程路基填筑安全高度提供参考。A new theoretical formula for soft ground bearing capacity is derived.This formula is based the unified strength theory,and the effects of consolidation,intermediate principal stress and the coefficient of lateral pressure are taken into consideration.According to this formula,an improved calculation method of the critical filling height of embankment is proposed.In addition,the calculation method is applied to railway subgrade filling test data to check its feasibility.The calculated results show reasonable good agreement with experiment results.The new formula may be used as the theoretical basis for determining the safe filling height at different phases of railway subgrade works.

关 键 词：道路工程 软土地基 统一强度理论 临界填高 

分 类 号：U416.1[交通运输工程—道路与铁道工程] TU471.8[建筑科学—结构工程]