| 天津地区饱和粉土地震液化的试验研究 |
| |
| 引用本文： | 周相国,邢贵发,苏玉国.天津地区饱和粉土地震液化的试验研究[J].岩土力学,2009,30(12):3813-3819. |
| |
| 作者姓名： | 周相国 邢贵发 苏玉国 |
| |
| 作者单位： | 1. 天津大学,土木工程系,天津,300072;天津市地质工程勘察院,天津,300191
2. 天津市勘察院,天津,300191 |
| |
| 摘 要： | 地震液化是导致地基失稳和上部结构受损的直接原因之一。通过对天津地区粉土进行原位取土以及现场原位测试分析，研究了粉土土质特点对液化判别的影响，并在动三轴试验基础上阐述了该区域粉土的动力特性和液化机制。结合原位测试方法比较了现有的地震液化判别方法，指出该区域粉土液化判别应考虑粉土成分特征的影响，并提出孔压达到围压的60%～90%，双幅应变达到4%可作为液化的判别标准。
|
| 关 键 词： | 饱和粉土 地震 液化判别 原位测试 动三轴 |
| 收稿时间： | 2008-02-25 |
Experimental study of earthquake liquefaction of saturated silt in Tianjin area |
| |
| ZHOU Xiang-guo,XING Gui-fa,SU Yu-guo.Experimental study of earthquake liquefaction of saturated silt in Tianjin area[J].Rock and Soil Mechanics,2009,30(12):3813-3819. |
| |
| Authors: | ZHOU Xiang-guo XING Gui-fa SU Yu-guo |
| |
| Institution: | 1. Department of Civil Engineering, Tianjin University, Tianjin 300072, China; 2. Tianjin Geo-Engineering Investigation Institute, Tianjin 300191, China; 3. Tianjin Institute of Geotechnical Investigation & Surveying, Tianjin 300191, China |
| |
| Abstract: | The soil liquefaction caused by earthquake is one of the direct reasons for the foundation invalidation and the structure collapse. Based on in-situ tests, liquefaction estimation of silt with different origins in Tianjin area is studied. Then the dynamic properties and liquefaction mechanism of the silt were illuminated based on dynamic triaxial test. And a comparison between the existed earthquake liquefaction assessment methods was made. combined with the in-situ tests. It is suggested that the influence of silt content should be taken into account in the liquefaction assessment; and the value of pore water pressure is 60%-90% of confining pressure, the value of double amplitude strain is 4%, these values can be used as the indexes of liquefaction evalution. |
| |
| Keywords: | saturated silt earthquake liquefaction assessment in-situ test dynamic triaxial test |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《岩土力学》浏览原始摘要信息 |
| 点击此处可从《岩土力学》下载免费的PDF全文 |
|
