大型油罐软土地基现场试验与数值分析
|
摘要
以阿尔及利亚储罐软基处理工程为背景,介绍了振冲碎石桩与充水预压加固软土地基的现场试验,通过对储罐地基充水预压期间所作的实测资料进行分析,论述了该项技术加固油罐地基的效果,探讨了地基沉降、环墙内侧土压力、孔隙水压力等的变化发展规律;针对油罐外深层的增量位移,利用轴对称有限元方法进行数值模拟和分析,辅助分析了地基变形。分析结果表明:振冲碎石桩与充水预压联合加固处理软弱地基是合理可行的,该油罐平面倾斜、非平面倾斜满足规范的地基变形允许值,有限元数值模拟可以应用于辅助分析地基变形。
A tank foundation treatment engineering project in soft soil area of Algeria was taken as an engineering case to introduce in-situ tests of soft soil foundation reinforcement,e.g.,Vibrofluctuation Crushed Stone(VCS) piles combined with water filling preloading.The in-situ test data obtained from the oil tank foundation during the water filling preloading period were analyzed to discuss reinforcement effects of the technique explore variations of foundation settlement,ring wall interior soil pressure and pore water pressure.In allusion to the vertical incremental settlements of deep strata under oil tanks.Axisymmetric FEM was adopted in the numerical simulation analysis and calculation.Moreover,deformation of foundation was analyzed to explain the actually-measured data.Analytical results showed that the soft soil could be improved reasonably by the VCS piles combined with preloading,the plane inclination and non-plane inclination of the surface met the standard value of deformation of foundation,finite element numerical simulation could be applied to explain the actually-measured data.
A tank foundation treatment engineering project in soft soil area of Algeria was taken as an engineering case to introduce in-situ tests of soft soil foundation reinforcement,e.g.,Vibrofluctuation Crushed Stone(VCS) piles combined with water filling preloading.The in-situ test data obtained from the oil tank foundation during the water filling preloading period were analyzed to discuss reinforcement effects of the technique explore variations of foundation settlement,ring wall interior soil pressure and pore water pressure.In allusion to the vertical incremental settlements of deep strata under oil tanks.Axisymmetric FEM was adopted in the numerical simulation analysis and calculation.Moreover,deformation of foundation was analyzed to explain the actually-measured data.Analytical results showed that the soft soil could be improved reasonably by the VCS piles combined with preloading,the plane inclination and non-plane inclination of the surface met the standard value of deformation of foundation,finite element numerical simulation could be applied to explain the actually-measured data.
引文
[1]曹星,刘小峰,定培中.碎石桩处理深厚层软土地基效果分析[J].长江科学院院报,2000,17(3):47-50.
[2]周立新,黄晓波,邓长平.碎石桩处理饱和软弱地基孔隙水压力试验研究[J].施工技术,2006,35(6):46-48.
[3]左威龙,刘汉龙,陈永辉.浆固碎石桩成桩注浆影响范围现场试验研究[J].岩土力学,2008,29(12):3329-3336.
[4]袁文明,戴济群,黄康理,等.超深水泥拌搅桩处理大型油罐软弱地基的试验研究[J].河海大学学报:自然科学版,2004,32(1):63-66.
[5]赵同顺,周波.大型油罐地基变形特性的研究[J].岩石力学与工程学报,2004,23(6):1037-1043.
[6]应宏伟,杨晓刚,卞守中,等.大型油罐地基现场试验分析[J].岩土工程学报,2005,27(2):157-161.
[7]严聪,张红,周旭荣.振冲碎石桩与充水预压联合处理地震区深厚软土地基[J].中南大学学报:自然科学版,2000,40(3):822-827.
[8]徐至钧,许朝铨,沈珠江.大型储罐地基基础设计与地基处理[M].北京:中国石化出版社,1999.
[9]姜弘道.水工结构工程与岩土工程的现代计算方法及程序[M].南京:河海大学出版社,1992.
[10]陈希哲.土力学地基基础[M].北京:清华大学出版社,1997:71
[2]周立新,黄晓波,邓长平.碎石桩处理饱和软弱地基孔隙水压力试验研究[J].施工技术,2006,35(6):46-48.
[3]左威龙,刘汉龙,陈永辉.浆固碎石桩成桩注浆影响范围现场试验研究[J].岩土力学,2008,29(12):3329-3336.
[4]袁文明,戴济群,黄康理,等.超深水泥拌搅桩处理大型油罐软弱地基的试验研究[J].河海大学学报:自然科学版,2004,32(1):63-66.
[5]赵同顺,周波.大型油罐地基变形特性的研究[J].岩石力学与工程学报,2004,23(6):1037-1043.
[6]应宏伟,杨晓刚,卞守中,等.大型油罐地基现场试验分析[J].岩土工程学报,2005,27(2):157-161.
[7]严聪,张红,周旭荣.振冲碎石桩与充水预压联合处理地震区深厚软土地基[J].中南大学学报:自然科学版,2000,40(3):822-827.
[8]徐至钧,许朝铨,沈珠江.大型储罐地基基础设计与地基处理[M].北京:中国石化出版社,1999.
[9]姜弘道.水工结构工程与岩土工程的现代计算方法及程序[M].南京:河海大学出版社,1992.
[10]陈希哲.土力学地基基础[M].北京:清华大学出版社,1997:71
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