| 某长江大桥深度超过15米的砂土层液化势的综合评价 |
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| 引用本文： | 刘建达,陈国兴,刘雪珠,王炳辉.某长江大桥深度超过15米的砂土层液化势的综合评价[J].地震工程与工程振动,2007,27(5):151-159. |
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| 作者姓名： | 刘建达 陈国兴 刘雪珠 王炳辉 |
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| 作者单位： | 1. 江苏省地震工程研究院,江苏,南京,210014
2. 南京工业大学,岩土工程研究所,江苏,南京,210009 |
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| 摘 要： | 不同抗震设计规范的砂土液化判别方法或国内外其他有代表性的液化判别方法所采用的地震动参数和土性指标及其埋藏条件是不同的,因而采用这些方法对同一工程场地进行液化势预测时其评价结果通常有一些差异,甚至会得到相反的结论。为了给重大工程建设提供较为合理、可信的地基液化势预测结果,采用多种液化判别方法进行场地液化势的综合评价是比较客观的,也是必要的。本文结合某长江大桥桥基工程,采用建筑抗震设计规范的砂土液化判别方法、国内外有代表性的液化判别方法、有限元数值分析法等多种方法逐一对该工程场地砂性土层进行液化判别,并结合室内动三轴液化试验结果,对主桥墩不考虑冲刷条件和考虑一般冲刷深度5m条件时的砂性土层进行了液化势的综合评价,并将各土层的液化势分为液化、可能液化和不液化3个等级,得到了较为合理可靠的判别结果。
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| 关 键 词： | 重大工程场地 液化判别方法 深层砂土液化 液化势综合评价 |
| 文章编号： | 1000-1301（2007）05-0151-09 |
| 修稿时间： | 2007-03-30 |
Comprehensive evaluation of liquefaction potential for sandy soil of the highway bridge on Yangtze river site under ground surface 15m to 30m |
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| LIU Jianda,CHEN Guoxing,LIU Xuezhu,WANG Binghui.Comprehensive evaluation of liquefaction potential for sandy soil of the highway bridge on Yangtze river site under ground surface 15m to 30m[J].Earthquake Engineering and Engineering Vibration,2007,27(5):151-159. |
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| Authors: | LIU Jianda CHEN Guoxing LIU Xuezhu WANG Binghui |
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| Institution: | 1. Institute of Earthquake Engineering for Jiangsu Province, Nanjing 210014, China;2. Institute of Geotechnical Engineering, Nanjing University of Technology, Nanjing 210009, China |
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| Abstract: | The different parameters are adopted,such as earthquake ground motion parameters,soil behaviour indexes and geological burying conditions,in the estimating methods for liquefaction potential of sandy soil in different seismic design codes and some typical estimating methods at home and abroad.So,there are some differences in evaluation results of sand liquefaction potential,when different estimating methods of liquefaction potential for sandy soils are applied in the identical engineering site.It is objective and necessary for multi-methodology in liquefaction estimation of sandy soil employed to give the appropriate and creditable comprehensive evaluation results of liquefaction potential for important engineering projects.In this paper,the estimating methods for liquefaction potential of sandy soils of code for seismic design of buildings in China,the typical estimating methods at home and abroad and the finite-element analysis method are employed in evaluating the liquefaction potential for sandy soils at a site of one highway bridge on Yangtze river under ground surface 15 m to 30 m,in combination with the vibration triaxial test results.The appropriate and creditable comprehensive evaluation results of sandy soils liquefaction potential are given based on the methods mentioned above,through considering 5m depth and without regard to riverbed scour condition.Moreover,the evaluation standard of liquefied potential for sandy soils is provided including liquefaction,probably liquefied and non-liquefied. |
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| Keywords: | important engineering project site method for sand liquefaction estimating liquefaction of deep-level sandy sandy soil Comprehensive evaluation of sandy soil liquefaction potential |
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