沪宁高速公路软土的工程特性研究  

Engineering Charaeteristics of Soft Soil under Shanghai Nanjing Expressway

作　　者：徐泽中[1,2] 方涤华[1,2] 姜朴[1,2] 蔡家范[1,2] 许道化[1,2] 

机构地区：[1]河海大学 [2]江苏宁沪高速公路股份有限公司

出　　处：《水利水电科技进展》1998年第2期9-12,共4页Advances in Science and Technology of Water Resources

摘　　要：用统一的国家土工试验方法标准和规范，对沪宁高速公路沿线工程勘察、室内试验、沉降估算和软基处理进行了系统研究，并辅以各标段补充勘探试验和现场观测成果进行校验。结果表明：沪宁高速公路东段大多数的ｗＬ１００＜４０％，属中压缩性土；沿线地基土上部土层中的前期固结压力ｐ′ｃ值大于覆盖土压力，处于超固结状态。应尽量选用先期固结压力和反映土的原位压缩特性的ｅ～ｌｇｐ′曲线分层总和法来估算最终固结沉降量。Based on the rational standards and codes for geotechnical test methods and rectified by complementary exploration tests and field observation data from each section,systematic researches are made on engineering exploration,laboratory test,settlement estimation and soft soil foundation treatment for Shanghai Nanjing Expressway.Most of the foundation soil in the eastern section of Shanghai Nanjing Expressway is of medium compressibility,the plastic limit measured being smaller than 40%.The preconsolidation pressure in the upper soil layer is larger than the existing overburden pressure,and the soil is in an overconsolidated state.Thus,the ultimate consolidation settlement should be calculated by e lg p′ curve layeraise summation method considering the preconsolidation effect.

关 键 词：沉降估算 高速公路 软土地基 地基处理 地基施工 

分 类 号：U412.366[交通运输工程—道路与铁道工程] U416.1