红黏土崩解性试验方法  

Test method for disintegration of red clay

作　　者：李善梅[1,2] 寿凯 刘之葵[1,2] 蒙剑坪[1,2] LI Shan-mei;SHOU Kai;LIU Zhi-kui;MENG Jian-ping(College of Civil Engineering and Architecture,Guilin University of Technology,Guilin 541004,China;Guangxi Key Laboratory of Geomechanics and Geotechnical Engineering,Guilin University of Technology,Guilin 541004,China)

机构地区：[1]桂林理工大学土木与建筑工程学院,广西桂林541004 [2]桂林理工大学广西岩土力学与工程重点实验室,广西桂林541004

出　　处：《桂林理工大学学报》2021年第4期804-809,共6页Journal of Guilin University of Technology

基　　金：国家自然科学基金项目(41867039);广西自然科学基金项目(2017GXNSFAA198238);广西高校中青年教师科研基础能力提升项目(2019KY0277,2020KY06028);广西岩土力学与工程重点实验室主任基金项目(桂科能19-Y-21-3);广西建筑新能源与节能重点实验室主任基金项目(桂科能19-J-21-11);广西大学生创新创业训练计划项目(202110596056,202110596057)。

摘　　要：为探究适合红黏土崩解性测试的试验方法,在对比现有测试方法的优缺点后,根据土样在水中受力平衡理论,分析水入渗过程中封闭气泡作用和黏土矿物的膨胀性对定量分析土体崩解性的影响,通过测试11组不同条件下红黏土的崩解性,验证封闭气泡以及土体膨胀性对崩解的影响,并结合红黏土的工程特性,提出一种实用的崩解试验方法。试验结果表明:短时间(<3 d)的崩解性测试,静水天平和烘干法可适于饱和及非饱和红黏土的崩解性测试;长时间(≥3 d)崩解试验只能用烘干法。为了提高崩解性的测试精度,建议非饱和土崩解入水1 h内采用静水天平读数,饱和土全过程以及非饱和土入水1 h后崩解试验采用烘干法读数。In order to explore the test methods suitable for the red clay disintegration experiment, the advantages and disadvantages of the existing test methods were compared and analyzed. The effects of closed bubble deformation and clay minerals swelling in soils on the disintegrating property based on equilibrium theory of forces were discussed and verified by 11 groups disintegration tests of red clay under different conditions. A suitable disintegration test method was proposed from the engineering characteristics of red clay. It provides reference for the experimental study of soil disintegrating property with similar engineering properties. The results show that both the hydrostatic balance and the drying method can be used in the disintegration test in a short time(less than 3 days) for the saturated and unsaturated red clay.And a long time(more than 3 days) disintegration test can only be carried out by the later. In order to improve the accuracy of disintegrating test, it is recommended to adopt hydrostatic balance reading within 1 hour after unsaturated soil disintegrating into water.Drying readings in the whole process of saturated soil disintegration and the disintegration of unsaturated soil after 1 hour of water entry were measured by drying method.

关 键 词：红黏土 崩解 测试方法 

分 类 号：TU411.91[建筑科学—岩土工程]