粗细粒混合土力学特性研究
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摘要
为对比分析不同细粒含量(小于0.075 mm)下粗细粒混合土的力学特性,文章进行了3组不同细粒含量的粗细粒混合土的固结排水三轴压缩试验,并分析了细粒含量对混合土的应力-应变和变形的影响。试验发现:相同围压下,对于混合土中细粒含量较高的土样具有更低的应力水平;低围压下,随着偏应力的增加土样的体积开始收缩,且细粒含量越高,收缩越慢。
the consolidated drained triaxial compression tests on three groups(with different fine-particle contents) of soils mixed with fine and coarse particles are conducted to compare and analyze the mechanical characteristics of the soils mixed with fine and coarse particles in condition of three different fine-particle(grain size smaller than 0.075 mm) contents.Furthermore,affects by the fine-particle contents on concrete stress-strain and deformation are studied.The tests present that in condition of the same surrounding pressure,soils with high content of fine particles is with lower stress;in condition of lower surrounding pressure,soil volume starts contracting with increase of slanting stress.The higher the fine-particle content is,the slower the soil contracts.
the consolidated drained triaxial compression tests on three groups(with different fine-particle contents) of soils mixed with fine and coarse particles are conducted to compare and analyze the mechanical characteristics of the soils mixed with fine and coarse particles in condition of three different fine-particle(grain size smaller than 0.075 mm) contents.Furthermore,affects by the fine-particle contents on concrete stress-strain and deformation are studied.The tests present that in condition of the same surrounding pressure,soils with high content of fine particles is with lower stress;in condition of lower surrounding pressure,soil volume starts contracting with increase of slanting stress.The higher the fine-particle content is,the slower the soil contracts.
引文
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[10]Prakasha K S,Chandrasekaran V S.Behavior of marine sand-clay mixtures under static and cyclic triaxial shear[J].Journal ofGeotechnical and Geoenvironmental Engineering,2005,131(2):213-222.
[11]Abedi Mehdi,Yasrobi S Shahaboddin.Effects of plastic fines onthe instability of sand[J].Soil Dynamics and Earthquake Engi-neering,2010,(3):61-67.
[12]中华人民共和国水利部.土工试验方法标准[M].北京:中国计划出版社,1999.
[13]南京水利科学研究院土工研究所.土工试验技术手册[M].北京:人民交通出版社,2003.
[14]杨进良.土力学[M].北京:中国水利水电出版社,2009.
[2]陈志波,朱俊高.宽级配砾质土三轴试验研究[J].河海大学学报,2010,38(6):704-710.
[3]陈志波,朱俊高,王强.宽级配砾质土压实特性试验研究[J].岩土工程学报,2008,30(3):446-449.
[4]陈志波,朱俊高,刘汉龙.宽级配砾质土应力路径试验研究[J].防灾减灾工程学报,2010,30(6):614-619.
[5]朱建华,游凡,杨凯虹.宽级配砾石土坝料的防渗性及反滤[J].岩土工程学报,1993,(6):18-27.
[6]张辉,朱俊高,王俊杰,袁友仁,冯业林.击实砾质土抗拉强度试验研究[J].岩石力学与工程学报,2006,25(增2):4186-4190.
[7]石崇喜,黄英,杨玉婷,冯欢,伯桐震.掺砂红土的力学特性及掺砂机理研究[J].工程勘察,2011,(4):1-8.
[8]胡明鉴,汪稔,孟庆山,刘观仕.降雨作用下砾石土斜坡坡面形态及临界特性[J].岩土力学,2006,27(9):1549-1553.
[9]刘恩龙,宋长航,罗开泰,万里.粗-细粒混合土动力特性探讨[J].世界地震工程,2010,26(增刊):28-31.
[10]Prakasha K S,Chandrasekaran V S.Behavior of marine sand-clay mixtures under static and cyclic triaxial shear[J].Journal ofGeotechnical and Geoenvironmental Engineering,2005,131(2):213-222.
[11]Abedi Mehdi,Yasrobi S Shahaboddin.Effects of plastic fines onthe instability of sand[J].Soil Dynamics and Earthquake Engi-neering,2010,(3):61-67.
[12]中华人民共和国水利部.土工试验方法标准[M].北京:中国计划出版社,1999.
[13]南京水利科学研究院土工研究所.土工试验技术手册[M].北京:人民交通出版社,2003.
[14]杨进良.土力学[M].北京:中国水利水电出版社,2009.
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