| 上海黏土强度特性真三轴试验研究 |
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| 引用本文： | 盛佳韧,武朝军,叶冠林,王建华.上海黏土强度特性真三轴试验研究[J].岩土力学,2013,34(1):47-52. |
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| 作者姓名： | 盛佳韧 武朝军 叶冠林 王建华 |
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| 作者单位： | 上海交通大学 土木工程系，上海 200240 |
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| 基金项目： | 国家自然科学基金项目(No. 41002097)；上海市重点学科建设项目(No. B208) |
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| 摘 要： | 利用自主改造的、大主应力与小主应力方向由刚性加压板加载、中主应力方向由围压室液压加载的自动控制刚柔复合真三轴仪，对上海原状软土进行同一π面上不同洛德角真三轴固结排水剪切试验。原状土样通过分块抽样法获取，共进行了5组不同洛德角（0°、15°、30°、45°和60°）排水剪切试验。试验结果显示，上海原状软土抗剪强度、屈服和破坏点位置随洛德角的增大而减小，体积变化量先增大后减小。三向应力状态下上海软土的破坏强度接近空间滑移面（SMP）破坏准则。
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| 关 键 词： | 真三轴试验 上海黏土 排水剪切试验 洛德角 |
| 收稿时间： | 2011-09-29 |
Strength property of Shanghai clay in true triaxial tests |
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| SHENG Jia-ren,WU Chao-jun,YE Guan-lin,WANG Jian-hua.Strength property of Shanghai clay in true triaxial tests[J].Rock and Soil Mechanics,2013,34(1):47-52. |
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| Authors: | SHENG Jia-ren WU Chao-jun YE Guan-lin WANG Jian-hua |
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| Institution: | Department of Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China |
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| Abstract: | A series of isotropic consolidated drained true triaxial tests with different Lode angles in the same π plane are carried out with an automatic controlled mixed boundary true triaxial apparatus. The maximum and minor principal stresses are applied by two pairs of rigid platens; and the intermediate principal stress is applied by water pressure in triaxial cell. Undisturbed soil sample is prepared by block sampling method; and totally 5 drained tests with different Lode angles (0°, 15°, 30°, 45°, 60°) are presented. Test results show that the shear strength, the yielding & failure points of Shanghai soft clay decrease while Lode angles increase. The volume change increases first and turns to decrease when Lode angle is larger than 30°. In general, three-dimensional strength of the Shanghai soft clay obeys the SMP (spatial mobilized plane) failure criterion. |
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| Keywords: | true triaxial test Shanghai clay drained shear test Lode angle |
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