摘要
为研究地下马蹄形管道在隧道爆破开挖过程中的振动响应对管道运行安全的影响,采用ANSYS/LS-DYNA有限元软件中的ALE算法建立三维数值模型,研究隧道爆破地下马蹄形管道的振动响应。研究结果表明:数值模拟中测点振速峰值与现场监测振速峰值误差均在10%之内,验证了数值模拟结果的可靠性;柱状炸药起爆后,爆破地震波以近似球形面波的形式传播至马蹄形管道,马蹄形管道各部分振动响应不同,拱顶、底板部分的拉应力峰值和振速峰值较大,边墙部分较小,且各部分拉应力峰值和振速峰值均随着与爆炸中心距离的增大而减小;在隧道爆破开挖过程中,管道的拉应力峰值和振速峰值与爆破掌子面距管线水平距离成反比,与上台阶掏槽孔药量成正比。
In order to study the dynamic response of horseshoe-shaped pipeline from tunnel blasting excavation, three-dimensional numerical model was established by using the ALE algorithm of ANSYS/LS-DYNA software The results show that the error of the peak vibration velocity between the measured point and field monitoring is within 10%, which verifies the reliability of numerical simulation results. After initiation of cylindrical explosion, the blasting seismic wave propagates along the horseshoe-shaped pipe with approximate spherical surface wave. For the horseshoe- shaped pipe, each part of vibration response is different. The peak tensile stress and the peak velocity on the roof and the baseplate part are bigger, while on the sidewall is less enough. Besides, the peak tensile stress and the peak velocity of each part decrease with the distance increase from the explosion center. During the tunnel excavation ,the peak tensile stress and the peak velocity are inversely proportional to the horizontal distance from the pipeline, which is proportional to the charge of the cutting hole.
作者
张良
管晓明
张春巍
李萌
李扬
熊怡思
王玉山
齐禄
ZHANG Liang;GUAN Xiao-ming;ZHANG Chun-wei;LI Meng;LI Yang;XIONG Si-yi;WANG Yu-shan;QI Lu(Qingdao University of Technology,Qingdao 266011 ,China;Beijing Municipal Three Constmction Engineering Co Ltd,Beijing 100022,China;Beijing Municipal Construction Group Co Ltd,Beijing 100045 ,China)
出处
《爆破》
CSCD
北大核心
2019年第2期117-125,共9页
Blasting
基金
国家自然科学基金青年基金项目(51708317)
山东省自然科学基金项目(ZR2016EEB27)
中国博士后科学基金面上项目(2017M621095)
关键词
马蹄形管道
隧道爆破
数值模拟
ALE算法
振动响应
horseshoe-shaped pipeline
tunnel blasting
numerical simulation
ALE algorithm
vibration response
