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| 青藏铁路重塑冻结粉质黏土动剪切模量试验研究 | |
| 引用本文： | 王丽霞,胡庆立,凌贤长,蔡德所,徐学燕.青藏铁路重塑冻结粉质黏土动剪切模量试验研究[J].地震工程与工程振动,2007,27(2):177-180. |
| 作者姓名： | 王丽霞 胡庆立 凌贤长 蔡德所 徐学燕 |
| 作者单位： | 1. 广西电力工业勘察设计研究院,广西,南宁,530023;哈尔滨工业大学,土木工程学院,黑龙江,哈尔滨,150090;吉林建筑工程学院,吉林,长春,130021;武汉大学,土木工程学院,湖北,武汉,430072 2. 哈尔滨工业大学,土木工程学院,黑龙江,哈尔滨,150090 3. 广西电力工业勘察设计研究院,广西,南宁,530023;武汉大学,土木工程学院,湖北,武汉,430072 |
| 基金项目： | 冻土工程国家重点实验室开放基金项目(SKLFSE200402)，中国科学院知识创新工程重大项目(KZCX1-SW-04) |
| 摘 要： | 通过低温动三轴试验,研究青藏铁路中重塑冻结粉质黏土的动剪切模量的变化规律及其主要因素。研究表明,冻土的最大动剪切模量随负温降低而显著增大,动剪切模量比随轴向荷载单级振次增加而有所增大,随负温降低而降低,随围压增加趋于一致。负温是冻土动力性能的一个极其重要的影响因素,因而寒区工程应引起足够的重视。研究结果对于合理认识冻土动力性能具有一定意义,也为进一步开展多年冻土场地工程地震安全性评价积累部分基础资料。 |
| 关 键 词： | 动剪切模量 冻结粉质黏土 低温动三轴试验 青藏铁路 |
| 文章编号： | 1000-1301（2007）02-0177-04 |
| 修稿时间： | 2006-06-182006-12-20 |
Experimental study on dynamic shear modulus of remolded frozen silty clay for Qinghai-Xizang Railway |
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| WANG Lixia,HU Qingli,LING Xianzhang,CAI Desuo,XU Xueyan.Experimental study on dynamic shear modulus of remolded frozen silty clay for Qinghai-Xizang Railway[J].Earthquake Engineering and Engineering Vibration,2007,27(2):177-180. | |
| Authors: | WANG Lixia HU Qingli LING Xianzhang CAI Desuo XU Xueyan |
| Institution: | 1. Guangxi Electric Power Industry Investigation Design and Research Institute, Nanning 530023, China; 2. School of Civil Engineering Harbin Institute of Technology, Harbin 150090, China; 3. Jilin Architectural and Civil Engineering Institute, Changchun 130021, China; 4. School of Civil Engineering Wuhan University, Wuhan 430072, China |
| Abstract: | The dynamic shear modulus variation and its main affecting factors are studied on the basis of the results of low-temperature dynamic triaxial test of frozen silty clay with remolded samples taken from Qinghai-Xizang Railway.It is indicated that the maximum dynamic shear modulus increases evidently with temperature decreasing.Dynamic modulus ratio increases with axial vibration times increasing,decreases with temperature decreasing.Shear modulus ratio does not vary evidently with confining pressure increasing.Temperature is one of the main affecting factors of dynamic properties of frozen soil,so full regard should be paid to cold region engineering.It is benefit to acknowledge the dynamic property of frozen soil.It also provides some important data for further developing engineering earthquake security evaluation in permafrost region. |
| Keywords: | dynamic shear modulus remolded frozen silty clay low temperature dynamic triaxial test Qinghai-Xizang Railway |
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