| 加筋黄土变形和强度特性的三轴试验研究 |
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| 引用本文： | 谢婉丽,王家鼎,王亚玲.加筋黄土变形和强度特性的三轴试验研究[J].地球科学进展,2004(Z1). |
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| 作者姓名： | 谢婉丽 王家鼎 王亚玲 |
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| 作者单位： | [1]西北大学地质系大陆动力学教育部重点实验室 [2]西北大学地质系大陆动力学教育部重点实验室 陕西 西安 [3]陕西 西安 |
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| 基金项目： | 陕西省自然科学基金(编号:2001D05)，陕西省科技攻关项目(编号:2003K09-G5)资助 |
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| 摘 要： | 用三轴压缩试验方法研究了土工合成材料加筋黄土的应力—应变及强度特性,探讨了在各种不同加筋方式和围压下加筋机理。结果表明,加筋可以增加土体破坏时的轴向应变和土体的抗拉能力,减小土的侧向变形;试验结果发现,并不是加筋层数越多越有利于土体的稳定,而是表现为加筋土的强度与布筋位置和层间距有一定的关系;同时,分析和解释了未加筋土的变形破坏和筋材在土体剪切破坏过程中的阻裂机理。试验研究得出了在土体中部加筋是最经济合理的布筋方式。
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| 关 键 词： | 三轴压缩试验 加筋黄土 土工格栅 应力—应变 强度 |
TRIAXIAL TESTS STUDY ON DEFORMATION AND STRENGTH CHARACTERISTICS OF REINFORCED LOESS |
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| XIE Wan-li,WANG Jia-ding,WANG Ya-ling.TRIAXIAL TESTS STUDY ON DEFORMATION AND STRENGTH CHARACTERISTICS OF REINFORCED LOESS[J].Advance in Earth Sciences,2004(Z1). |
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| Authors: | XIE Wan-li WANG Jia-ding WANG Ya-ling |
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| Abstract: | Laboratory triaxial compression tests were carried out in order to determine the stress-strain and strength characteristics of reinforced loess. The mechanical behavior of the composite material was investigated through varying the number of geonet layers, confining pressure, and geonet arrangement. The results demonstrated that geonet inclusion increase the axial strain at failure and ductility. It reduces the peak strength and lateral dilation. However, it is indicated that there is certain relation between strength of reinforced loess and geogrid arrangement. It is based on the tests results to study the mechanism of the shearing failure of reinforcement and unreinforcement soil. It is concluded that reinforcement arranged at the middle of speciman is the more reasonable. |
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| Keywords: | Triaxial test Reinforced loess Geogrid Stress-strain Strength |
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