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当前位置: 首页 > 文章 > 膨胀性对膨胀土强度影响的试验研究 河南科技学院学报(自然科学版) 2018 (2) 72-78
Position: Home > Articles > Experimental study of expansion influencing expansive soil strength Journal of Henan Institute of Science and Technology(Natural Science Edition) 2018 (2) 72-78

膨胀性对膨胀土强度影响的试验研究

作  者：
刘述丽;徐彬;殷宗泽
关键词：
膨胀土;膨胀性;自由膨胀率;裂隙开展程度
摘  要：
为了研究不同膨胀性膨胀土强度的变化规律,通过对原始土料添加主要成分为蒙脱石的膨润土配制了不同膨胀性的试样,对不同膨胀性的试样分别进行了1~5次干湿循环过程,使试样具有不同的裂隙开展程度,对不同膨胀性及不同裂隙开展程度的试样拍照,并进行饱和状态下的抗剪强度试验.试验结果反映了干湿循环后膨胀性对试样裂隙开展程度、抗剪强度指标的影响以及膨胀性对膨胀土强度的影响仍是通过裂隙作用实现的,揭示了膨胀性对膨胀土强度影响的规律;给出了裂隙充分发展的强度指标随自由膨胀率变化的关系,建立了采用自由膨胀率来估算膨胀土饱和强度的经验公式.
译  名：
Experimental study of expansion influencing expansive soil strength
作  者：
LIU Shuli;XU Bin;YIN Zongze;Department of Hydraulic Engineering,Zhejiang Tongji Vocational College of Science and Technology;Power China Huadong Engineering Corporation Limited;Key Laboratory of Geomechanics and Embankment Engineering,Ministry of Education,Hohai University;Ggeotechnical Research Institute,Hohai University;
单  位：
LIU Shuli%XU Bin%YIN Zongze%Department of Hydraulic Engineering,Zhejiang Tongji Vocational College of Science and Technology%Power China Huadong Engineering Corporation Limited%Key Laboratory of Geomechanics and Embankment Engineering,Ministry of Education,Hohai University%Ggeotechnical Research Institute,Hohai University
关键词：
expansive soil;;expansion;;free swelling ratio;;fissure development degree
摘  要：
The paper considered that the strength of expansive soil is not only affected by saturation,density and degree of cracks,but also by their expansion.The test results showed that,the larger free swelling ratio,the higher development degree of cracks by wet-dry cycle,accordingly,strength index reduced more significantly.At the same time,the free swelling ratio affects strength index of c significantly,so the c value should be payed more attention when treating the expansive soil problem,especially for the case of highly expansive soil.

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