淮安市区黄泛冲积粉土工程特性探讨
|
摘要
基于大量的勘探资料、土工试验和原位测试数据,本文对淮安市区浅层黄泛冲积粉土的分布特征和工程特性进行了探讨。采用数理统计方法,对区内黄泛冲积粉土的物理力学指标进行了统计,发现粉土不同物理力学指标的变异系数差别较大,室内指标不能完全反映粉土的实际特性。进而对淮安市区黄泛冲积粉土静力触探试验锥尖阻力qc、标准贯入试验击数N值与载荷试验实测得到的地基承载力特征值fak进行统计分析,并分别对qc、N与fak进行相关性分析,拟合了相应的经验公式。最后对饱和粉土液化特性进行了探讨,并提出了相应的工程防治措施。
Based on the large amount of data from geological explorations,geotechnical tests and field survey,the distribution of the shallow silt and the engineering characteristics of alluvial silt by the Yellow River in Huai'an are discussed.By means of the mathematical statistical methods,the physical and mechanical indices are statistically analyzed.It is found that the variation coefficients of the parameters of alluvial silt are different,and the indoor indices can not fully reflect the actual engineering characteristics of alluvial silt.The N-values(standard penetration tests)and qc(cone penetration tests)for alluvial silt by the Yellow River in Huai'an are compared with the fak from load tests.Through the correlation analysis between the N-value and fak,and between qc and fak,the empirical formula is obtained where there is high correlation between them.Finally,the liquefaction characteristics of saturated silt are studied,and some engineering prevention measures are put forward.
Based on the large amount of data from geological explorations,geotechnical tests and field survey,the distribution of the shallow silt and the engineering characteristics of alluvial silt by the Yellow River in Huai'an are discussed.By means of the mathematical statistical methods,the physical and mechanical indices are statistically analyzed.It is found that the variation coefficients of the parameters of alluvial silt are different,and the indoor indices can not fully reflect the actual engineering characteristics of alluvial silt.The N-values(standard penetration tests)and qc(cone penetration tests)for alluvial silt by the Yellow River in Huai'an are compared with the fak from load tests.Through the correlation analysis between the N-value and fak,and between qc and fak,the empirical formula is obtained where there is high correlation between them.Finally,the liquefaction characteristics of saturated silt are studied,and some engineering prevention measures are put forward.
引文
[1]张宁,郭青芳,刘福臣.黄河冲积平原饱和粉土试验指标取值计算[J].岩土工程界,2009,12(1):66～67.
[2]陈一全,连峰,付飞营等.黄河下游冲积粉土地震液化判别研究[J].山东建筑大学学报,2006,21(6):489～496.
[3]王国强,吴道祥,岳涛等.安徽亳州市新近沉积粉土及其承载力的确定[J].地质与勘探,2000,36(6):73～75.
[4]《工程地质手册》编委会.工程地质手册(第四版)[M].北京:中国建筑工业出版社,2007.
[5]中华人民共和国国家标准.岩土工程勘察规范(GB50021-2001)[S].北京:中国建筑工业出版社,2009.
[6]胡庆兴,刘雪珠,从为民等.淮安市典型土动力特性研究[J].地震工程与工程振动,2003,23(6):144～148.
[7]李方明,陈国兴,从为民.淮安市砂土地震液化势的综合评估[J].防灾减灾工程学报,2005,25(2):216～221.
[8]中华人民共和国国家标准.建筑抗震设计规范(GB50011-2010)[S].北京:中国建筑工业出版社,2010.
[9]史玉金,曾正强,严学新等.上海市崇明岛浅层砂土、粉土分布探讨[J].工程地质学报,2005,13(1):34～38.
[10]江苏省水文地质工程地质勘察院.1∶5万淮阴市、淮安市水文地质工程地质环境地质勘查报告[R].1994.
[2]陈一全,连峰,付飞营等.黄河下游冲积粉土地震液化判别研究[J].山东建筑大学学报,2006,21(6):489～496.
[3]王国强,吴道祥,岳涛等.安徽亳州市新近沉积粉土及其承载力的确定[J].地质与勘探,2000,36(6):73～75.
[4]《工程地质手册》编委会.工程地质手册(第四版)[M].北京:中国建筑工业出版社,2007.
[5]中华人民共和国国家标准.岩土工程勘察规范(GB50021-2001)[S].北京:中国建筑工业出版社,2009.
[6]胡庆兴,刘雪珠,从为民等.淮安市典型土动力特性研究[J].地震工程与工程振动,2003,23(6):144～148.
[7]李方明,陈国兴,从为民.淮安市砂土地震液化势的综合评估[J].防灾减灾工程学报,2005,25(2):216～221.
[8]中华人民共和国国家标准.建筑抗震设计规范(GB50011-2010)[S].北京:中国建筑工业出版社,2010.
[9]史玉金,曾正强,严学新等.上海市崇明岛浅层砂土、粉土分布探讨[J].工程地质学报,2005,13(1):34～38.
[10]江苏省水文地质工程地质勘察院.1∶5万淮阴市、淮安市水文地质工程地质环境地质勘查报告[R].1994.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心