基于互相关函数的单孔法波速测试优化算法
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摘要
土的剪切波速是岩土工程领域的一个重要参数。建筑场地类别划分、地基饱和砂土液化判别、地震反应分析等都依赖于剪切波速,由于其重要性,对它的测定技术和精确程度应重点研究。针对工程中广泛采用的单孔法剪切波速测试,提出了一种基于互相关函数计算土层剪切波速的优化算法。克服了传统数据处理方法中经常遇到的负波速、波速数值明显过大或过小和同一土层各测点波速差别较大等4种不合理因素,提高了数据分析的精度和效率。
Soil shear wave velocity is an important parameter of earthquake engineering.Classification of engineering site sort,reassessment of saturated sandy soil liquefaction and subsoil earthquake response analysis all depend on subsoil shear wave velocity.An optimized approach for single-hole method of shear wave velocity measurement is presented.The approach overcomes main irrationalities of minus velocities,over-large and over-small velocities and large velocity differences among measuring points in the same layer of traditional analysis method,improves the data processing precision and efficiency of single-hole method.
Soil shear wave velocity is an important parameter of earthquake engineering.Classification of engineering site sort,reassessment of saturated sandy soil liquefaction and subsoil earthquake response analysis all depend on subsoil shear wave velocity.An optimized approach for single-hole method of shear wave velocity measurement is presented.The approach overcomes main irrationalities of minus velocities,over-large and over-small velocities and large velocity differences among measuring points in the same layer of traditional analysis method,improves the data processing precision and efficiency of single-hole method.
引文
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[2]GB50011-2001,建筑抗震设计规范[S].
[3]陈龙珠,严细水,宋春雨.面波法检测地基波速中振源与测点的布置方法[J].工程力学,2003,20(5):174-178.CHEN Long-zhu,YAN Xi-shui,SONG Chun-yu.On arrangement of excitation and transducers in surface wave measurement[J].Engineering Mechanics,2003,20(5):174-178.
[4]Park B,Miller R D,Xia J.Multichannel analysis of surface waves[J].Geophysics,1999,64(3):800-808.
[5]崔建文.一种改进的全局优化算法及其在面波频散曲线反演中的应用[J].地球物理学报,2004,47(3):521-527.CUI Jian-wen.An improved global optimization method and its application to the inversion of surface wave dispersion curves[J].Chinese Journal of Geophysics,2004,47(3):521-527.
[6]GB/T 50269-97,地基动力特性测试规范[S].
[7]林宗元.岩土工程实验检测手册[M].辽宁:辽宁科学技术出版社,1994.
[8]刘曾武,黄振平.工程地震场地实验方法的研究[R].国家地震局,1995.
[9]章文波,李沙白.弹性波速测试分析方法的研究[R],强震观测研究报告集[M].北京:专利文献出版社,1996.
[10]侯兴民,薄景山,杨学山.互相关函数在单孔法波速测试中的应用[J].地震工程与工程振动,2004,24(2):59-63.HOU Xing-min,Bo Jing-shan,YANG Xue-shan.Applications of correlation function in shear-velocity measurement of single-hole method[J].Earthquake Engineering and Engineering Vibration,2004,24(2):59-63.
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