金银岛岩土台阵原位剪切波速剖面评估  

In-situ shear wave velocity profile assessment of Treasure Island Geotechnical Array

作　　者：卢颖 王海云[1,2] 姜伟平 张潇男 LU Ying;WANG Haiyun;JIANG Weiping;ZHANG Xiaonan(Institute of Engineering Mechanics,China Earthquake Administration,Key Laboratory of Earthquake Engineering and Engineering Vibration,Harbin 150080,China;Key Laboratory of Earthquake Disaster Mitigation,Ministry of Emergency Management,Harbin 150080,China)

机构地区：[1]中国地震局工程力学研究所中国地震局地震工程与工程振动重点实验室,哈尔滨150080 [2]地震灾害防治应急管理部重点实验室,哈尔滨150080

出　　处：《世界地震工程》2022年第4期204-210,共7页World Earthquake Engineering

基　　金：中国地震局工程力学研究所基本科研业务费专项资助项目(2018B05);国家自然科学基金联合基金项目(U2139207)。

摘　　要：土层的剪切波速是描述土动力学特性的重要参数之一。利用金银岛岩土台阵记录的8次浅源地方震的弱震动数据,使用解卷积的地震干涉测量法识别的剪切波走时,评估了该台阵两个水平方向的原位剪切波速剖面。结果表明:在44.2 m深度以上,估计与实测的平均剪切波速剖面基本一致,而在44.2 m到103.6 m深度范围前者大于后者;本研究估计的平均剪切波速剖面比MEHTA等(2007)估计的平均剪切波速剖面更接近实测结果,在44.2 m到103.6 m深度范围,本研究估计的平均剪切波速与MEHTA等(2007)估计的平均剪切波速相近,二者均大于实测的平均剪切波速。The shear wave velocity of the soil is one of the important parameters characterizing soil dynamics.Using the weak⁃motion data of 8 shallow⁃source local earthquakes recorded by the Treasure Island Geotechnical Array,shear⁃wave travel times were identified by seismic interferometry based on deconvolution to estimate the in⁃situ shear wave velocity profiles in two horizontal directions of the array.The results show that the average shear wave velocity profiles estimated in this study are consistent with the measured one above 44.2 m depth,whereas the estimated average shear wave velocities are greater than the measured one at the depth range of 44.2-103.6 m.The average shear wave velocity profiles estimated in this study is closer to the measured one than the result estimated by Mehta et al.(2007).At the depth range of 44.2-103.6 m,the average shear wave velocities estimated in this study are close to the result estimated by Mehta et al.(2007),and both are greater than the measured one.

关 键 词：原位剪切波速剖面 解卷积的地震干涉测量法 弱震动数据 地方震 金银岛岩土台阵 

分 类 号：TU435[建筑科学—岩土工程]