地铁隧道钻爆法施工对邻近埋地管道影响的模型试验研究  

Model test study on the influence of subway tunnel drilling and blasting method on adjacent buried pipeline

作　　者：王海涛[1] 金慧[1] 贾金青[2] 常胜涛[1] 闫帅[1] WANG Haitao;JIN Hui;JiAJinqing;CHANG Shengtao;YAN Shuai(School of Civil and Safety Engineering, Dalian Jiaotong University, Dalian, Liaoning 116028, China;State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China)

机构地区：[1]大连交通大学土木与安全工程学院,辽宁大连116028 [2]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024

出　　处：《岩石力学与工程学报》2018年第A01期3332-3339,共8页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金资助项目(51208073);辽宁省"百千万人才工程"人选项目择优资助(2014921061);大连市高层次人才创新支持计划项目(2015R073)~~

摘　　要：以大连地铁隧道工程为背景,开展室内相似模型试验,综合考虑装药量、爆心距等影响因素,对地铁隧道钻爆法施工时岩体和邻近埋地管道的振动特性及管道动力响应规律进行研究。研究结果表明:相同爆破荷载作用下岩体和管道振动特性存在差异,管道最大振速小于岩体最大振速,振动衰减时间稍有差别;管道与岩体的最大振速之比与比例装药量呈非线性增加关系,为描述这一规律,定义管土最大振速传递系数和管土相对刚度系数,建立适用于各种管道和岩体的最大振速传递系数公式;管道最大动应力和最大振速呈线性增加关系,利用这一结论,提出综合考虑管道疲劳强度设计值和现行振速控制值的管道安全控制标准,并确定C30混凝土管道的振速安全控制标准为2.5 cm/s。In order to study the adverse effect of subway tunnel drilling and blasting method on adjacent buried pipeline,the laboratory similar model test taking into account the influence factors such as the charge and the explosion center distance,was carried out based on the project of Dalian metro tunnel. The results show that the vibration characteristics of rock mass and pipeline under the same blasting load are different. The maximum vibration velocity of pipeline is smaller than rock mass,and the attenuation time is slightly different. The ratio of the maximum vibration velocity of pipeline to that of rock mass increases nonlinearly with the charge increasing and the distance decreasing. In order to describe this law,the maximum velocity transfer coefficient and the relative stiffness coefficient of pipe-soil were defined,and the formula of the maximum velocity transfer coefficient for various pipelines and rock mass was established. The relationship between maximum dynamic stress and maximum vibration velocity is linearly increased. Based on this conclusion,the pipeline safety control standard considering the design value of fatigue strength and the current velocity control value of pipeline was proposed. The safety control standard of C30 concrete pipeline is determined to be 2.5 cm/s by the method.

关 键 词：隧道工程 地铁隧道 钻爆法施工 模型试验 管道振动特性 管道控制标准 

分 类 号：U45[建筑科学—桥梁与隧道工程]