土体三轴试验固结过程解析解  

Analytical solution for consolidation process of triaxial test on soil

作　　者：陈志波[1,2,3] 王志文[1,2,3] 朱俊高[4] 梅国雄[5] 

机构地区：[1]福州大学环境与资源学院资源与城乡建设系,福建福州350116 [2]国土资源部丘陵山地地质灾害防治重点实验室,福建福州350116 [3]福建省水土流失遥感监测评估与灾害防治重点实验室,福建福州350116 [4]河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京210098 [5]广西大学土木建筑工程学院,广西南宁530004

出　　处：《岩土力学》2016年第4期943-947,956,共6页Rock and Soil Mechanics

基　　金：973计划课题(No.2013CB036404);国家自然科学基金(No.41102167);福州大学科技发展基金(No.2011-XQ-12)~~

摘　　要：三轴试验是获取土体强度和应力变形特性的一个重要室内试验手段。三轴试验中,排水固结阶段试样的孔压消散及固结完成情况是非常重要的两个核心要素,它是进行后续剪切试验的基础和依据。基于等应变假设,推导了土体三轴剪切试验排水固结过程的解析解,以用于分析整个排水固结过程的孔压消散和固结完成程度。针对室内三轴固结排水(CD)试验,利用所推导的解析解对其排水固结过程的孔压和固结度进行了验算对比。结果表明,解析解计算得到的固结度和孔压消散曲线与室内三轴剪切试验的相应曲线吻合得较好,说明解析解可应用于三轴剪切试验排水固结过程分析。As one of the major laboratory test methods, the triaxial test are often performed to gain the strength and stress and strain behaviors of soils. There are two great important factors during consolidation process of the triaxial test, i.e. the dissipation of pore pressure and the completion status of the consolidation, which determine the conduct of the following shear process. Based on equal strain assumptions, an analytical solution is presented to analyse the pore pressure and the consolidation degree throughout the drainage consolidation process of the triaxial test. According to the laboratory triaxial consolidated drained（CD） test, the pore pressure and the consolidation degree of the drainage consolidation process are checked by using the analytical solution. The comparative results show that the two curves calculated by the analytical solution, including the curve of consolidation degree and the curve of pore pressure dissipation, are in good agreement with the corresponding curves gained by laboratory triaxial shear tests, which verifies that the analytical solution can be applied to analyze the drainage consolidation process of triaxial shear test.

关 键 词：三轴试验 三轴固结排水(CD)试验 固结过程 孔压消散 排水曲线 

分 类 号：TU411[建筑科学—岩土工程]