饱和砂砾料液化后应力与变形特性试验研究
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摘要
利用高精度静–动两用三轴仪(试样尺寸φ200 mm×510 mm)进行了砂砾料液化后静力再加载试验,研究了其应力应变特性。文中探讨了各种因素对砂砾料液化后静剪切强度的影响。结果表明:砂砾料液化后静剪切强度主要取决于围压,与液化前相对密度无关。
By use of the medium scale dynamic triaxial apparatus(specimen size φ200 mm×510 mm),the laboratory tests on the sand-gravel after liquefaction were performed.The stress-strain responses and the main factors influencing the strength of liquefied sand-gravel were studied.It was shown that the strength of liquefied sand-gravel was mainly dependent on the confining pressure.
By use of the medium scale dynamic triaxial apparatus(specimen size φ200 mm×510 mm),the laboratory tests on the sand-gravel after liquefaction were performed.The stress-strain responses and the main factors influencing the strength of liquefied sand-gravel were studied.It was shown that the strength of liquefied sand-gravel was mainly dependent on the confining pressure.
引文
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[6]徐斌,孔宪京,邹德高,等.饱和砂砾料振动孔压与轴向应变发展模式研究[J].岩土力学,2006,27(6):925–928.(XU bin,KONG Xian-jing,ZOU De-gao,et al.Study of dynamic pore water pressure and axial strain in sand-gravel composites liquefaction[J].Rock and Soil Mechanics,2006,27(6):925–928.(in Chinese))
[2]YASUDA S,YOSHIDA N,MASUDA T,et al.Stress–strain relationship of liquefaction sands[C]//Earthquake Geotech-nical Engineering.Rotterdam:Balkema,1995,8:11–816.
[3]刘汉龙,周云东,高玉峰.砂土地震液化后大变形特性试验研究[J].岩土工程学报,2002,24(2):142–146.(LIU Han-long,ZHOU Yun-dong,GAO Yu-feng.Study on the behaviour of large ground displaycement of sand dur to seismic liquefaction[J].Chinese Journal of Geotech Engrg,2002,24(2):142–146.(in Chinese))
[4]ZHANG Jian-ming,WANG Gang.A constitutive model for evaluating s mall to large cyclic strainsof saturated sand during liquefaction process[J].Chinese Journal of Geotech Engrg,2004,26(4):546–552.
[5]孔宪京,张涛,邹德高,等.中型动三轴仪的研制及微小应变测试技术的应用[J].大连理工大学学报,2005,45(1):79–84.(KONG Xian-jing,ZHANG Tao,ZOU De-gao,et al.Design of medium scale dynamic triaxial test apparatus and its application at small strains[J].Journal of Dalian University of Technology,2005,45(1):79–84.(in Chinese))
[6]徐斌,孔宪京,邹德高,等.饱和砂砾料振动孔压与轴向应变发展模式研究[J].岩土力学,2006,27(6):925–928.(XU bin,KONG Xian-jing,ZOU De-gao,et al.Study of dynamic pore water pressure and axial strain in sand-gravel composites liquefaction[J].Rock and Soil Mechanics,2006,27(6):925–928.(in Chinese))
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