| 饱和粉土液化后变形特性试验研究 |
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| 引用本文： | 刘汉龙,曾长女,周云东.饱和粉土液化后变形特性试验研究[J].岩土力学,2007,28(9):1866-1870. |
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| 作者姓名： | 刘汉龙 曾长女 周云东 |
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| 作者单位： | 1. 河海大学 岩土工程研究所，南京 210098；2. 河南工业大学 土木建筑学院，郑州 450052 |
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| 摘 要： | 利用多功能静动液压剪切三轴仪，进行了一系列饱和粉土液化后变形特性试验，研究了干密度和液化程度对粉土液化后变形特性的影响，并考虑试验动加载前小幅预振和不规则动加载对粉土液化后变形特性的影响。试验结果表明，液化后变形可由两段应变 和 组成。干密度越小， 越大， 段剪切模量越低；液化越严重 越大，不同液化程度对 段剪切模量影响很小；动加载前小幅预振和不规则动加载对液化后变形影响较小。提出了饱和粉土液化后变形模型，给出了模型参数的推导。验证结果表明，该模型的计算值与试验值吻合较好，说明该模型能很好地描述这种变形行为。
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| 关 键 词： | 粉土 液化后 室内试验 应力-应变关系 |
| 文章编号： | 1000-7598-（2007）09-1866-05 |
| 收稿时间： | 2005-09-21 |
| 修稿时间： | 2005-09-21 |
Test study on post-liquefaction deformation behavior of silt ground |
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| LIU Han-long,ZENG Chang-nü,ZHOU Yun-dong.Test study on post-liquefaction deformation behavior of silt ground[J].Rock and Soil Mechanics,2007,28(9):1866-1870. |
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| Authors: | LIU Han-long ZENG Chang-nü ZHOU Yun-dong |
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| Institution: | 1.Institute of Geotechnical Engineering, Hohai University, Nanjing 210098，China ; 2. Department of Civil Engineering and Architecture, Henan University of Techonology, Zhengzhou 450052, China |
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| Abstract: | A series of tests have been conducted to simulate post-liquefaction behavior of silt in a new universal triaxial torsional shear apparatus of Hohai University. Such effects on post-liquefaction of silt as soil dry density, severity of liquefaction, pre-vibration, non-regular vibration are discussed. It is found that post-liquefaction strain is composed of and . The bigger dry density is the larger and the larger shear modulus are during the stage of The more serious of liquefaction is, the larger is. But there is no difference of shear modulus during the stage of , when severity of liquefaction change. The pre-vibration and non-regular vibration affects slightly on post-liquefaction stress-strain relationship. A new post-liquefaction model of liquefied silt is proposed based on test results. And how to obtain parameters of the model is also introduced. The results predicted by the proposed method are consistent well with the experiment observation. |
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| Keywords: | silt post-liquefaction lab test stress-strain relationship |
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