2023年2月6日土耳其双强震场地液化及其震害特征现场调查分析  

In-situ investigation of site liquefaction and liquefaction-induced damages triggered by two strong Türkiye earthquakes on Feb.6^(th),2023

作　　者：陈龙伟[1,2] 刘昊儒 任叶飞 吴晓阳[1,2] 袁晓铭 CHEN Longwei;LIU Haoru;REN Yefei;WU Xiaoyang;YUAN Xiaoming(Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,China Earthquake Administration,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地震工程与工程振动重点实验室,黑龙江哈尔滨150080 [2]地震灾害防治应急管理部重点实验室,黑龙江哈尔滨150080

出　　处：《岩土工程学报》2024年第7期1541-1548,共8页Chinese Journal of Geotechnical Engineering

基　　金：中国地震局工程力学研究所基本科研业务费专项项目(2020B01)。

摘　　要：震害考察是地震工程研究的支柱之一。2023年2月6日土耳其中南部发生了两次震级分别为Mw7.8,Mw7.5的罕见双强震,造成巨大的人员伤亡和财产损失。通过实地震害考察,对双强震触发的场地液化震害及其特征进行调查分析,分析结果显示:①本次地震液化具有现象显著、液化面积大、涉及范围广、液化灾害严重等特征;②场地液化震害形式多样,表现为喷砂、地面侧移、地基沉降以及地基丧失承载力等典型液化震害形式,且造成大量建筑物严重破坏;③在两个调查地区发现了液化引发的地面侧移,侧移量从几米至十几米,并直接导致建筑物严重破坏甚至毁坏;④在格尔巴舍(Golbasi)城区发现数十栋建筑物因地基液化丧失承载力而出现严重倾斜(不均匀沉降)、沉降,沉降量从几十厘米到1~2米、倾斜角度从几度到十几度不等,现场测量建筑最大倾斜角度达到20°。通过对土耳其地震场地液化的宏观现象调查分析,认识本次地震触发的液化特征及其震害启示,以期为中国地基液化减灾技术研究提供参考。The post-earthquake scientific investigation is one of the essentials for earthquake engineering.On the 6th of February,2023,two deadly earthquakes,whose magnitudes were Mw7.8 and Mw7.5,respectively,shook Southern-Central Turkey,caused significantly large casualties and tremendous economy loss.Through the in-situ site investigation,the liquefaction phenomena and related damages triggered by the two strong earthquakes were surveyed and preliminarily analyzed.The analytical results indicate:(1)The liquefactions induced by the earthquakes were significant,and distributed in a wide area,and caused severe damages to buildings;(2)the consequences of site liquefaction were observed as sand boils,lateral spread,ground subsidence and loss of site bearing capacity,which yielded damages to the residence buildings in great extent.(3)The liquefaction-induced lateral spread was observed in two investigation zones,and its distance ranged from meters to tens of meters,resulting in damage or demolishing of buildings.(4)In an investigation area of Golbasi City,tens of buildings were found subsided and tilting due to liquefaction-induced loss of soil bearing capacity.The subsidence of buildings ranged from tens of centimeters to 1~2 meters,and the tilting angles varied from several degrees to tens of degrees with the measured maximum angle of 20 degrees in tilt.Through the field survey of liquefaction triggered by the shocks and the analysis of liquefaction-induced consequences,the characteristics of liquefaction and the lessons learned are presented,and the findings are expected to be beneficial for liquefaction hazard mitigation in China.

关 键 词：2023年土耳其地震 场地液化 液化震害特征 现场调查 地震科考 

分 类 号：TU435[建筑科学—岩土工程]