基于现场原位振动试验的风沙路基动力稳定性研究  

Study on Dynamic Stability of Aeolian Sand Subgrade Based on Field In-Situ Vibration Test

作　　者：朱孟伟 陈华林 曹强强 周聪 胡延杰 Zhu Mengwei;Chen Hualin;Cao Qiangqiang;Zhou Cong;Hu Yanjie(CCCC South China Transportation Construction Co.,Ltd.,Guangzhou Guangdong 510000,China;No.2 Engineering Company Ltd.of CCCC First Harbor Engineering Co.,Ltd.,Qingdao Shandong 266071,China)

机构地区：[1]中交华南交通建设工程有限公司,广东广州510000 [2]中交一航局第二工程有限公司,山东青岛266071

出　　处：《港口航道与近海工程》2024年第1期87-92,共6页Port,Waterway and Offshore Engineering

摘　　要：以蒙华铁路MHTJ-1标段风积沙段路基工程为依托,选择6个风积沙填筑路堤断面作为测试断面,通过调节高速液压夯实机落锤的落距和作用时间,实现列车荷载作用下路基面动应力水平的模拟。在路基本体中布设动土压力盒、加速器等传感器,采集路堤基床结构的动位移、累积位移、振动加速度、振动速度及动应力等参数,获取基床结构原位振动试验的动力响应,评价风积沙路基基床的动力稳定性,为今后类似工程施工提供技术指导。Based on eolian sand subgrade works of Menghua Railway MHTJ-1 section,six sections of eolian sand subgrade are selected as the testing sections.Dynamic stress on the subgrade under train load is simulated by adjusting the drop distance and acting time of the hammer of high-speed hydraulic rammer.The subgrade is equipped with dynamic soil pressure box,accelerator and other sensors so as to gather such parameters as dynamic displacement,cumulative displacement,vibration acceleration,vibration velocity and dynamic stress of the subgrade.In addition,the dynamic response is obtained through in-situ vibration test of the subgrade,and the dynamic stability of eolian sand subgrade is evaluated,which will provide technical reference for similar projects.

关 键 词：风沙路基 原位振动试验 动力响应 动应力模拟 稳定性评价 

分 类 号：U213.1[交通运输工程—道路与铁道工程]