上海交通大学 土木工程系； 海洋工程国家重点实验室， 上海 200240
发布日期:2020-03-06通讯作者:廖晨聪，男，助理研究员，电话（Tel.）：021-34204833；E-mail：billaday@sjtu.edu.cn.作者简介:王亚光（1990-），男，河北省衡水市人，博士生，主要研究地下结构的动力响应问题.基金资助:国家自然科学基金重点基金（41330633）, 国家自然科学基金面上基金（51678360），重大科研仪器研制项目（41727802）Parametric Study and Displacement Response of Steel Pipeline Subjected to Surface Explosion
WANG Yaguang，LIAO Chencong，ZHANG QiDepartment of Civil Engineering; State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Published:2020-03-06摘要/Abstract
摘要： 通过将u-p模型嵌入有限元程序建立了地面爆炸荷载下钢顶管的动态响应模型，研究了饱和土中钢顶管在地面爆炸荷载作用下的动力响应问题.以钢顶管的位移响应为主要评价指标，研究了炸药量、起爆位置、钢顶管埋置深度以及顶管半径等参数对于钢顶管位移响应的影响.研究结果表明顶管竖向位移随炸药量增大,顶管半径的增大会降低顶管在爆炸荷载下的承载能力，适当提高埋深可以显著增强顶管在地面爆炸荷载作用下的抗爆能力.此外，随着偏移距离的增大，顶管竖向位移逐渐降低，最终在爆炸荷载作用下微量上浮，顶管的水平位移也随偏移距离先增大后减小.
关键词: 顶管； 地表爆炸； 饱和土； 位移响应
Abstract: A coupled numerical model is established by adopting the u-p model. The dynamic response of pipe jacking in saturated soil under surface explosion is investigated in detail. A comprehensive parametric study is carried out to study effect of explosive charge, explosion offset, embedment depth and radius of the pipe jacking. The results show that the vertical displacement of pipe jacking increases with explosive charge. The stability capacity of the pipe jacking under surface explosion decreases as the pipe radius increases. Increasing the buried depth of pipe jacking can significantly enhance the anti-explosion ability of pipe jacking under surface explosion. In additioin, the vertical displacment of the pipe jacking decreases as the off-set distance increases. The pipe jacking rises slightly under surface explosion eventually. And the horizontal displacement increases firstly and then decreases as off-set distance increases.
Key words: pipe jacking; surface explosion; saturated soil; displacement response
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