可伸缩钢拱架在东岗特长公路隧道支护应用中的测试分析  

Test and Analysis in Support Application of Scalable Steel Arch Frame in Super-long Donggang Highway Tunnel

作　　者：赵军 杜世明 王允 夏立锋 魏新江 韩同春[5] ZHAO Jun;DU Shiming;WANG Yun;XIA Lifeng;WEI Xinjiang;HAN Tongchun(Yuyao Transportation Engineering Consulting and Supervision Co.,Ltd.,Yuyao 315400;Ningbo Shuntong Group,Yuyao 315400;Yuyao Traffic Design Institute,Yuyao 315400;Hangzhou City University,Hangzhou 310015;College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058)

机构地区：[1]余姚交通工程咨询监理有限公司,余姚315400 [2]宁波舜通集团有限公司,余姚315400 [3]余姚市交通规划设计研究院,余姚315400 [4]浙大城市学院,杭州310015 [5]浙江大学建筑工程学院,杭州310058

出　　处：《现代隧道技术》2023年第5期167-176,共10页Modern Tunnelling Technology

基　　金：宁波市交通运输科技计划项目(202304)。

摘　　要：针对常规钢拱架在软弱破碎围岩中支护存在的问题,提出一种接头可伸缩的钢拱架,即在普通钢拱架中加入可伸缩接头,并加入支撑臂。在东岗山特长隧道工程中进行可伸缩钢拱架的应用测试,对比分析可伸缩钢拱架支护段和普通钢拱架支护段的围岩深层位移、拱架内力、围岩压力以及拱顶沉降。结果表明,伸缩接头钢拱架对围岩起到了及时支承的作用,与普通钢拱架相比,可以更有效地约束围岩的变形,对于变形量大的围岩可以有效限制围岩松动区的早期发展,适用于软弱破碎围岩区的支护。In response to the problems existing in conventional steel arches,the use of a steel arch with scalable joints is proposed,that is,adding scalable joints and supporting arms to the ordinary steel arch.The application test of scalable steel arch frame is conducted in the Donggangshan Super-Long Tunnel,and a comparative analysis is performed on deep displacement of surrounding rock,internal force of steel arch,surrounding rock pressure,and crown settlement of the scalable steel arch support section and the ordinary steel arch support section.The results show that the scalable joint steel arch frame provides timely support for the surrounding rock.Compared with the or⁃dinary steel arch frame,it can more effectively constrain the deformation of surrounding rock.For the surrounding rock with large deformation,it can effectively limit the early development of the loose area of surrounding rock,and is suitable for support in weak and fractured surrounding rock areas.

关 键 词：可伸缩钢拱架 公路隧道 现场测试 围岩压力 

分 类 号：U455.7[建筑科学—桥梁与隧道工程]