摘要
文章以麻竹山隧道上跨厦深铁路隧道工程实例为背景,通过三维数值动力计算分析,对新建隧道开挖爆破对既有隧道的安全性影响进行了分析。研究了在爆破荷载作用下,既有隧道二衬不同部位的速度时程曲线,研究结果表明:施工爆破荷载作用下,隧洞结构振动以竖向振动为主,与荷载振动方向相同且结构各部位振动强度随离荷载距离的增加而迅速衰减,并依此提出了工程建议。
Based on the example of the Dashen-Shenzhen railway tunnel on the Mazhushan Tunnel,this paper analyzed the safety impact of the new tunnel excavation blasting on the existing tunnel through the three-dimensional numerical dynamics analysis and analyzed the blasting load.The velocity time history curves of different parts of the tunnel two linings showed that under the construction blasting load,the vibration of the tunnel structure is mainly vertical vibration,which is the same as the direction of load vibration,and the vibration intensity of each part of the structure decreases rapidly with the increase of distance from load.Based on this,some engineering suggestions were put forward.
作者
何振华
李逸
HE Zhen-hua;LI Yi(Tunnel and Underground Space Institute,Central and Southern China Municipal Engineering Design&Research Institute Co.,Ltd.,Wuhan,Hubei 430010,China)
出处
《企业技术开发》
2018年第12期20-23,共4页
Technological Development of Enterprise
关键词
爆破工程
近接施工
公路隧道
三维动力模拟
Blasting engineering
Close construction
Highway tunnel
3D dynamic simulation
