液化判别标贯击数最大临界值的计算与应用
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摘要
本文通过对《建筑抗震设计规范》中地震液化判别公式的深入分析和理解,利用极值原理和思想,提出了工程场地标贯击数理论最大临界值的概念,利用理论最大临界值,对饱和土进行了液化初判。对于饱和砂土,现场即可判别是否液化,对于饱和粉土,现场可进行是否液化的筛选,从而减少了现场采取扰动土样的数量,减少了测定黏粒含量的土工试验量,提高了岩土工程勘察效率,具有一定的理论价值和实用意义。
Based on deeply analyzing and understanding the liquefaction discrimination formulas in Code for Seismic Design of Building,using the maximum principle and idea,the concept of SPT theoretical maximum critical value is presented. By using the said critical value,the liquefaction preliminary discrimination of saturated soil is carried out. For the saturated sand,whether liquefaction or not can be determined in the field,and for the saturated silt,the screening of liquefaction can be carried out in the field. It can reduce the adopting number of disturbed soil and the soil tests for clay content,and improve the efficiency of geotechnical engineering exploration,which has the certain theoretical value and practical significance.
Based on deeply analyzing and understanding the liquefaction discrimination formulas in Code for Seismic Design of Building,using the maximum principle and idea,the concept of SPT theoretical maximum critical value is presented. By using the said critical value,the liquefaction preliminary discrimination of saturated soil is carried out. For the saturated sand,whether liquefaction or not can be determined in the field,and for the saturated silt,the screening of liquefaction can be carried out in the field. It can reduce the adopting number of disturbed soil and the soil tests for clay content,and improve the efficiency of geotechnical engineering exploration,which has the certain theoretical value and practical significance.
引文
[1]中华人民共和国国家标准.建筑抗震设计规范(GB 50011-2010)[S].北京:中国建筑工业出版社,2010.The State Standards of People's Republic of China.Code for seismic design of buildings(GB 50011-2010)[S].Beijing:Chinese Architectural&Building Press,2010.(in Chinese)
[2]韩铮.《建筑抗震设计规范》(GB 50011-2010)中液化判别公式改进思路解析[J].工程勘察,2011,39(6):8~13.Han Zheng.Improvement of liquefaction criterion in Code for seismic design of buildings(GB 50011-2010)[J].Geotechnical Investigation&Surveying,2011,39(6):8~13.(in Chinese)
[3]王刚,张建民.地震液化问题研究进展[J].力学进展,2007,37(4):575~589.Wang Gang,Zhang Jianmin.Progress in the study of earthquake liquefaction[J].Advances in Mechanics,2007,37(4):575~589.(in Chinese)
[4]石兆吉,顾宝和,张荣祥.地震液化判别与评价的专家系统[J].工程勘察,1997,25(5):5~8.Shi Zhaoji,Gu Baohe,Zhang Rongxiang.Expert system for earthquake liquefaction discriminationand evaluation[J].Geotechnical Investigation﹠Surveying,1997,25(5):5~8.(in Chinese)
[5]刘汉龙,丰士根,高玉峰等.砂土多机构边界面模型及其试验验证[J].岩土力学,2003,24(5):696~700.Liu Hanlong,Feng Shigen,Gao Yufeng et al.Sand multiple mechanism boundary surface model and its experimental verification[J].Rock and Soil Mechanics,2003,24(5):696~700.(in Chinese)
[6]林志强,姜彦彬,庞井龙等.真空预压复合土钉支护在软土基坑中的运用研究[J].工程勘察,2014,42(5):10~15.Lin Zhiqiang,Jiang Yanbin,Pang Jinlong et al.Study on foundation pit supporting by soil nails in soft clay improved by combined vacuum preloading[J].Geotechnical Investigation&Surveying,2014,42(5):10~15.(in Chinese)
[2]韩铮.《建筑抗震设计规范》(GB 50011-2010)中液化判别公式改进思路解析[J].工程勘察,2011,39(6):8~13.Han Zheng.Improvement of liquefaction criterion in Code for seismic design of buildings(GB 50011-2010)[J].Geotechnical Investigation&Surveying,2011,39(6):8~13.(in Chinese)
[3]王刚,张建民.地震液化问题研究进展[J].力学进展,2007,37(4):575~589.Wang Gang,Zhang Jianmin.Progress in the study of earthquake liquefaction[J].Advances in Mechanics,2007,37(4):575~589.(in Chinese)
[4]石兆吉,顾宝和,张荣祥.地震液化判别与评价的专家系统[J].工程勘察,1997,25(5):5~8.Shi Zhaoji,Gu Baohe,Zhang Rongxiang.Expert system for earthquake liquefaction discriminationand evaluation[J].Geotechnical Investigation﹠Surveying,1997,25(5):5~8.(in Chinese)
[5]刘汉龙,丰士根,高玉峰等.砂土多机构边界面模型及其试验验证[J].岩土力学,2003,24(5):696~700.Liu Hanlong,Feng Shigen,Gao Yufeng et al.Sand multiple mechanism boundary surface model and its experimental verification[J].Rock and Soil Mechanics,2003,24(5):696~700.(in Chinese)
[6]林志强,姜彦彬,庞井龙等.真空预压复合土钉支护在软土基坑中的运用研究[J].工程勘察,2014,42(5):10~15.Lin Zhiqiang,Jiang Yanbin,Pang Jinlong et al.Study on foundation pit supporting by soil nails in soft clay improved by combined vacuum preloading[J].Geotechnical Investigation&Surveying,2014,42(5):10~15.(in Chinese)
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