| 卸荷状态下黏性土的变形和强度试验研究 |
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| 引用本文： | 宰金珉,张云军,王旭东,常银生. 卸荷状态下黏性土的变形和强度试验研究[J]. 岩土工程学报, 2007, 29(9): 1409-1412 |
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| 作者姓名： | 宰金珉 张云军 王旭东 常银生 |
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| 作者单位： | 南京工业大学岩土工程研究所；南京工业大学岩土工程研究所 江苏南京210009；江苏南京210009； |
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| 基金项目： | 国家自然科学基金;江苏省高校自然科学基金;南京工业大学校科研和教改项目 |
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| 摘 要： | 南京河西地区原状黏性土应力路径试验表明,不排水情况下,侧向卸荷试验得到的割线模量E5′0要大于轴向加荷试验得到的割线模量E5 0,且大致有E5′0=1.7 E5 0关系;轴向加荷和侧向卸荷条件下得到的有效抗剪强度指标基本一致。上述结论在工程实例数值模拟分析中的应用明显改善了地面沉降预测结果与实测结果的吻合程度。
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| 关 键 词： | 黏性土 卸荷试验 变形模量 强度指标 |
| 文章编号： | 1000-4548（2007）09-1409-04 |
| 修稿时间： | 2006-06-01 |
Experimental research on deformation and strength of cohesive soil under lateral extension |
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| ZAI Jin-min,ZHANG Yun-jun,WANG Xu-dong,CHANG Yin-sheng. Experimental research on deformation and strength of cohesive soil under lateral extension[J]. Chinese Journal of Geotechnical Engineering, 2007, 29(9): 1409-1412 |
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| Authors: | ZAI Jin-min ZHANG Yun-jun WANG Xu-dong CHANG Yin-sheng |
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| Affiliation: | Geotechnical Engineering Institute Nanjing University of Technology Nanjing 210009 China |
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| Abstract: | Stress paths tests of undisturbed cohesive soils in Hexi area of Nanjing were used to simulate the stress state in excavation.It was indicated that the secant modulus E5′0 obtained from the lateral extension tests was larger than E50 from the axial compression tests and the approximate relation between them was E5′0 =1.7 E50.The same parameters of effective shear strength were obtained form the axial compression and the lateral extension tests.The predicted values of surface settlement in numerical analysis were obviously improved with the application of test results,and there were good agreement between the measured results and the numerical results. |
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| Keywords: | cohesive soil lateral extension test deformation modulus strength parameter |
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