A series of experiments about dynamic triaxial apparatus were carried out to study the dynamic response behavior of silt from Hangzhou Bay. We studied the influence of structure, loading frequency, dynamic stress on dynamic strain, critical cyclic stress ratio, and the dynamic strength. The test results implied that, under the same loading conditions,the remoded samples are more likely to undergo structural failure than the undisturbed ones in smaller cycles. However, the dynamic strength of undisturbed soil is greater than that of remoded ones. Structural impact become an important factor influencing the dynamic strength of soil samples, the influence increased with the increase of dynamic stress, and decreased with the increase of frequency. On the other hand, the variation of loading frequency has significant effect on the dynamic characteristics of silt, the more frequency increased, the more cycles sample required to reach a failure, at the same time, the critical cyclic stress ratio of silt is also enlarged.
Key words
Hangzhou Bay /
silt /
cyclic loading /
structure /
dynamic strength
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
References
[1] China Bay Records Compiling Committee. Chinese bay records: The fifth section[M]. Beijing:Ocean Press,1992:189-190.
中国海湾志编纂委员会.中国海湾志:第五分册[M]. 北京:海洋出版社,1992:189-190.
[2] FINN W D L, MARTIN G R.Offshore pile foundations in sand under earthquake loading[J]. Applied Ocean Research,1980,2(2):81-84.
[3] CHRISTIAN J T,TAYLOR P K, YEN J K C, et al. Large diameter underwater pipeline for nuclear power plant designed against soil liquefaction[C]//Proceedings, sixth annual offshore technology conference, Houston, Texas, May,1974:597-606.
[4] YE Yin-can, LAI Xiang-hua. Dynamic strength characteristics of silt in the Hangzhou Bay[J]. Marine Sciences,2003,27(2):56-59.
叶银灿,来向华.杭州湾粉质土动强度特性研究[J].海洋科学,2003,27(2):56-59.
[5] MENG Fan-li, LU Cheng-yuan,WANG Shan-shan.Experimental study on dynamic strain and strength of silt under wave load[J].Journal of Zhejiang University of Technology,2007,35(6):671-675.
孟凡丽,卢成原,王姗姗.波浪荷载下粉质土动应变和动强度的试验研究[J].浙江工业大学学报,2007,35(6):671-675.
[6] ZHU Xiao-ke,HU Min-yun,ZHU Ye. Study on the workability of silt from seashore under cyclic loading effect[J]. Journal of Zhejiang University of Technology,2008,36(2):214-220.
朱小可,胡敏云,朱烨.循环荷载作用下近海粉土工作性状的试验研究[J].浙江工业大学学报,2008,36(2):214-220.
[7] HU Rui-lin. The cohesive soil micro-structures quantitative model and its engineering geological characteristics[M]. Beijing: Geological Publishing House,1995:3-13.
胡瑞林.黏性土微结构定量模型及其工程地质特征研究[M]. 北京:地质出版社,1995:3-13.
[8] LAREW H G, LEONARDS G A. A strength criterion for repeated loads[J]. Highway Research Board Proceedings,1962,41:529-556.
[9] FRANCE J W, SANGREY D A.Effects of drainage in repeated loading of clays[J]. Journal of the Geotechnical Engineering Division,1977,103(7):769-785.
[10] LIU Tian-jun, GE Xiu-run, AN Guan-feng. Study of characteristics of saturated soft clay under uniaxial cyclic load[J]. Chinese Journal of Rock Mechanics and Engineering,2013,31(1):45-51.
刘添俊,葛修润,安关峰.单向循环荷载作用下饱和软黏土的性状研究[J].岩石力学与工程学报,2012,31(1):45-51.
[11] FENG Xiu-li, YE Yin-can, MA Yan-xia, et al. Silt pore pressure response and dynamic strength under dynamic loading[J]. Journal of Ocean University of Qingdao,2002,32(3):426-433.
冯秀丽,叶银灿,马艳霞,等.动荷载作用下海底粉土的孔压响应及其动强度[J].青岛海洋大学学报,2002,32(3):426-433.
[12] XIE Din-yi. Soil dynamics[M]. Beijing: Higher Education Press,2011:146-147.
谢定义.土动力学[M]. 北京:高等教育出版社,2011:146-147.
PDF(878 KB)
