连拱隧道下穿老旧管线施工技术研究  

STUDY ON CONSTRUCTION TECHNOLOGY OF CROSSING OLD PIPELINE UNDER MULTI ARCH TUNNEL

作　　者：路镇武 孟平原 夏中强 Lu Zhen-wu;Meng Ping-yuan;Xia Zhong-qiang

机构地区：[1]中建二局第三建筑工程有限公司,北京100070

出　　处：《建筑技术开发》2022年第19期69-71,共3页Building Technology Development

基　　金：大断面双连拱隧道施工关键技术(24296D20005);大断面双连拱隧道施工方法优化研究(CSCEC2b3c–2020–K–53)。

摘　　要：以下穿老旧输水管线南上庄双连拱隧道多维度控制技术为例,通过减少单孔装药量及一次起爆药量来降低爆破源头振动速率,采取地表及洞内减震技术弱化地震波传播途径,并提高洞内衬砌强度降低后期地表后期沉降,研究连拱隧道下穿老旧输水管线“弱爆破开挖+减震措施+强支护体系”,监测振动速率和后期地表沉降量,总结“弱爆破开挖+减震措施+强支护体系”成套施工技术为类似工程提供参考。Taking the multi-dimensional control technology of nanshangzhuang double arch tunnel crossing the old water transmission pipeline as an example,this paper studies the construction technology of ’weak blasting excavation + damping measures + strong support system’ under the old water transmission pipeline by reducing the single hole charge and one-time detonating charge to reduce the vibration rate of the blasting source,adopting the surface and in tunnel damping technology to weaken the propagation path of seismic wave,improving the lining strength in the tunnel and reducing the later surface settlement,Monitor the vibration rate and later surface settlement,and summarize the complete set of construction technology of "weak blasting excavation + damping measures + strong support system",so as to provide reference for similar projects.

关 键 词：双连拱隧道 下穿管线 弱爆破开挖 强支护体系 

分 类 号：TU74[建筑科学—建筑技术科学]