扰动对砂土天然强度和模量的影响及室内恢复方法研究  

Effects of Sampling Disturbance on Natural Strength and Modulus of Cohesionless Soil and Laboratory Recovering Method

作　　者：李家平[1] 高大钊[1] 

机构地区：[1]同济大学地下建筑与工程系,上海200092

出　　处：《工程勘察》2002年第5期8-10,40,共4页Geotechnical Investigation & Surveying

摘　　要：本文采用三轴试验对润杨大桥北锚碇基坑工程砂土取样的扰动影响进行了分析评价 ,并对室内如何恢复力学特性进行了初步对比研究。结果表明 ,砂土也具有一定的结构强度 ,实际工程中取得的“原状”砂土样的质量较差 ,通过室内预处理可以较好地恢复原位状态。The effects of sampling disturbance on the cohesionless soil of certain project using triaxial compression test are evaluated herein and the method to recover the mechanic properties of the soil in laboratory is also studied. The test results show that structure strength under original stress condition exists in the soil. The original properties of disturbed soils can be recovered by proloading with original stress before shear testing.

关 键 词：砂土 天然强度 模量 薄壁取土器 原状土样 重塑土样 三轴压缩 

分 类 号：TU411.7[建筑科学—岩土工程]