| 天津市区第一海相层粉质黏土卸荷变形特性的试验研究 |
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| 引用本文： | 郑刚,颜志雄,雷华阳,王沛. 天津市区第一海相层粉质黏土卸荷变形特性的试验研究[J]. 岩土力学, 2008, 29(5): 1237-1242 |
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| 作者姓名： | 郑刚 颜志雄 雷华阳 王沛 |
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| 作者单位： | 1.天津大学，天津 300072；2.天津城建学院，天津 300384 |
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| 摘 要： | 通过对天津市区地层中第一海相层底部的粉质黏土原状饱和试样进行的一系列K0固结不排水三轴卸荷试验，研究土体卸荷路径下的变形特性。试验表明，该种土在卸荷条件下应力-应变曲线可用双曲线形式模拟，而且存在比较明显的归一化性状，其初始切线卸荷模量与固结围压成正比。研究成果对天津市区基坑开挖及支护结构设计计算、软土隧道施工研究及其他相关岩土工程问题的研究均有较大的实用价值。
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| 关 键 词： | 试验研究 卸荷路径 变形特性 归一化 |
| 文章编号： | 1000-7598-(2008)05-1237-06 |
| 收稿时间： | 2006-10-09 |
| 修稿时间： | 2006-10-09 |
Experimental studies on unloading deformation properties of silty clay of first marine layer in Tianjin urban area |
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| ZHENG Gang,YAN Zhi-xiong,LEI Hua-yang,WANG Pei. Experimental studies on unloading deformation properties of silty clay of first marine layer in Tianjin urban area[J]. Rock and Soil Mechanics, 2008, 29(5): 1237-1242 |
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| Authors: | ZHENG Gang YAN Zhi-xiong LEI Hua-yang WANG Pei |
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| Affiliation: | 1. Tianjin University, Tianjin 300072, China; 2. Tianjin Institute of Urban Construction, Tianjin 300384, China |
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| Abstract: | With the improved triaxial equipment, a series of K0 consolidation and undrained shear tests have been carried out to study the unloading deformation properties of a typical soil in Tianjin urban area. According to the experimental results, the stress-strain curve is a hyperbola and has obvious normalization character. The initial tangent modulus obtained is directly proportional to the initial confining pressure. |
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| Keywords: | experimental studies unloading stress paths deformation properties normalization |
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