粉质黏土粘聚力影响因素显著性分析  

Significance Analysis of Factors Affecting the Cohesion of Silty Clay

作　　者：王宸宇 孙兆辉[1] 卞汉兵[1,2] 鹿翔宇 邱秀梅 WANG Chen-yu;SUN Zhao-hui;BIAN Han-bing;LU Xiang-yu;QIU Xiu-mei(College of Water Conservancy and Civil Engineering/Shandong Agricultural University,Tai’an 271018,China;College of Integrated Engineering and Engineer/University of Lille France,Lille 59650,France)

机构地区：[1]山东农业大学水利土木工程学院,山东泰安271018 [2]法国里尔大学综合理工工程师学院,法国里尔59650

出　　处：《山东农业大学学报（自然科学版）》2020年第4期646-650,共5页Journal of Shandong Agricultural University：Natural Science Edition

基　　金：山东省重点研发计划(2017GSF16104)。

摘　　要：本文以位山灌区粉质黏土为研究对象,制备不同干密度、含水率的试样进行差异性冻融处理,冻融循环结束后对土样进行直剪试验,并对试验数据的影响因素显著性分析,结合分析结果建立粘聚力回归方程。结果表明:土体粘聚力与含水率、冻融循环次数呈负相关,与干密度呈正相关,土体粘聚力在冻融循环1~2次之后显著降低,低密度、低含水率的土体在冻融作用下粘聚力下降幅度较大;经多次冻融循环后土体粘聚力趋于稳定;各因素对粉质黏土粘聚力影响存在差异,不同影响因素对土体粘聚力的影响表现为:干密度>含水率>冻融次数。In this paper,the cohesion of the silty clay taking from Wei Shan irrigation area was studied by the laboratory tests,taking into consideration the dry density,the water content,and more important,the number of freeze-thaw cycle.According to the test data,the significance of each influencing factor was analyzed,and the regression equation of cohesion was established based on the significance analysis results.The test results show that:the cohesion of soil is negatively correlated with water content and freeze-thaw cycles,but positively correlated with dry density.The cohesion of soil decreases significantly with the number of freeze-thaw cycles,especially for the first and second cycle.Then,the cohesion tends to be stable after repeated freeze-thaw cycles.For the silty clay,the dry density has the most significant effect on the cohesion,followed by water content and the number of freeze-thaw cycle.

关 键 词：冻融循环 粉质黏土 粘聚力 直剪试验 显著性分析 

分 类 号：TU411.7[建筑科学—岩土工程]