海域工程场地可液化土的地震液化效应分析
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摘要
能否对砂土液化进行准确的判断评价,与工程的安全性、经济效益和社会效应关系密切。目前,勘察规范和抗震规范中均没有专门针对海底岩土层饱和砂土液化判别方法的规定和要求。文章对目前饱和砂土可液化性判别方法进行了分析总结,给出了海域工程场地可液化土的液化判别方法及存在的问题,提出海域工程建设场地饱和砂土层的判别宜采用标准贯入试验法和室内液化振动三轴试验抗液化剪应力判别法相结合的方式进行综合评价。
The evaluation of sand liquefaction has an enormous influence to engineering safety,economic efficiency and social effects.At present,there is a lack of the special regulations and requirements on the liquefaction evaluation method of the saturated sand of the seabed in the standards for investigation and seismic design.The current method of liquefaction evaluation about saturated sand is summarized.The liquefaction evaluation method and the problems which exist in liquefied soil of maritime engineering site is provided.It is a more reasonable mode to adopt a comprehensive evaluation which includes the method of standard penetration test and the method of indoor liquefaction tri-axial dynamic test in the evaluation of saturated sand of maritime project.
The evaluation of sand liquefaction has an enormous influence to engineering safety,economic efficiency and social effects.At present,there is a lack of the special regulations and requirements on the liquefaction evaluation method of the saturated sand of the seabed in the standards for investigation and seismic design.The current method of liquefaction evaluation about saturated sand is summarized.The liquefaction evaluation method and the problems which exist in liquefied soil of maritime engineering site is provided.It is a more reasonable mode to adopt a comprehensive evaluation which includes the method of standard penetration test and the method of indoor liquefaction tri-axial dynamic test in the evaluation of saturated sand of maritime project.
引文
[1]范士凯,粟怡然.砂土液化的工程地质判别法[J].资源环境与工程,2006,11:595-600.
[2]国家建委建筑科学研究院地基基础研究所.《地基基础震害调查与抗震分析》(唐山地震调查报告)[R].1978,11.
[3]林华国,贾兆宏.砂土液化判别方法研究[J].岩土工程技术,2007,4:89-93.
[4]辜明清,傅兵.砂土液化的评价问题[J].四川水力发电.2005,8:24-28.
[5]GB50011-2001.建筑抗震设计规范(2008年版)[S].北京:中国标准出版社,2008.
[6]GB50267-1997.核电厂抗震设计规范[S].北京:中国标准出版社,1998.
[7]Seed H B,Idriss I M.Simplified Procedures for Evaluating Soil Liquefaction Patential[J].Journal of Soil Mechanics and Foundation Division,ASCE 1971.
[2]国家建委建筑科学研究院地基基础研究所.《地基基础震害调查与抗震分析》(唐山地震调查报告)[R].1978,11.
[3]林华国,贾兆宏.砂土液化判别方法研究[J].岩土工程技术,2007,4:89-93.
[4]辜明清,傅兵.砂土液化的评价问题[J].四川水力发电.2005,8:24-28.
[5]GB50011-2001.建筑抗震设计规范(2008年版)[S].北京:中国标准出版社,2008.
[6]GB50267-1997.核电厂抗震设计规范[S].北京:中国标准出版社,1998.
[7]Seed H B,Idriss I M.Simplified Procedures for Evaluating Soil Liquefaction Patential[J].Journal of Soil Mechanics and Foundation Division,ASCE 1971.
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