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冰川冻土 ›› 2003, Vol. 25 ›› Issue (6): 648-652.

• 冻土物理与寒区工程 • 上一篇    下一篇

地震荷载作用下温度和围压对冻土强度影响的试验研究

吴志坚1,2, 马巍1, 王兰民2, 程建君3, 冯文杰1   

  1. 1. 中国科学院, 寒区旱区环境与工程研究所冻土工程国家重点实验室, 甘肃, 兰州, 730000;
    2. 中国地震局兰州地震研究所, 甘肃, 兰州, 730000;
    2. 中国科学院, 寒区旱区环境与工程研究所冻土工程国家重点实验室, 甘肃, 兰州, 730000;
    3. 中原油气高新股份有限公司, 天然气产销厂科研所, 河南, 濮阳, 457061
  • 收稿日期:2003-01-09 修回日期:2003-03-26 出版日期:2003-12-25 发布日期:2012-04-26
  • 作者简介:吴志坚(1974-),男,安徽太湖人,1995年毕业于西安地质学院应用地球物理专业,现在中国科学院寒区旱区环境与工程研究所攻读博士学位,主要从事寒区工程、冻土动力学方向的研究.E-mail:wizhj@ns.lzb.ac.cn
  • 基金资助:
    地震科学联合基金会资助课题(100134);中国科学院知识创新工程重大项目(KZCX1-SW04);国家重点基础研究发展规划项目(2002CB412704);中国地震局昆仑山口西8.1级地震科学考察项目资助

Laboratory Study on the Effect of Temperature and Confining Pressureon Strength of Frozen Soil under Seismic Dynamic Loading

WU Zhi-jian1,2, MA Wei1, WANG Lan-min2, CHENG Jian-jun3, FENG Wen-jie1   

  1. 1. State Key Laboratory of Frozen Soil Engineering, CAREERI, CAS, Lanzhou Gansu 730000, China;
    2. Lanzhou Institute of Seismology, China Seismological Bureau, Lanzhou Gansu 730000, China;
    3. Institute of Zhongyuan Oil and Natural Gas High-technique Lt d., Puyang Henan 457061, China
  • Received:2003-01-09 Revised:2003-03-26 Online:2003-12-25 Published:2012-04-26

摘要: 通过对重塑冻结兰州黄土的动三轴试验,较系统研究了地震荷载作用下冻土的动强度特性,并且定量研究了其在不同温度(-2℃、-5℃、-7℃)和围压(1MPa、3MPa、5MPa)条件下的变化规律.结果发现:冻结黄土的动抗剪强度随围压的增大、温度的降低、振次的减少而增大;动粘聚力Cd随振次的减小和温度的降低而增大;动内摩擦角φd随振次的增大和温度的降低而增大.

关键词: 重塑冻结黄土, 地震动荷载, 动强度, 温度

Abstract: On the low-temperature triaxial test apparatus of MTS-810 at State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, systematic dynamic characteristics of frozen soil under seismic dynamic loading were studied by means of dynamic triaxial tests. Dynamic shear strength tests of frozen soil under different temperatures (-2,-5 and-7 ℃) and different confining pressures (1, 3 and 5 MPa ) have been carried out, and the variations of parameters (dynamic cohesion (Cd) and dynamic friction angle (φd)) of these mechanical properties under different temperatures have also been studied systematically. It is found that the dynamic shear strength of frozen loess increases with increasing confining pressure, decreasing temperature and vibration number (N); Cd rises with falling N and temperature; φd ascends with rising N and descending temperature. Models for the influence of temperature and confining pressure on the dynamic strength were established.

Key words: frozen soil, seismic dynamic loading, dynamic strength, temperature

中图分类号: 

  • P642.14