赵香玲



摘 要:针对软岩隧道变形监测问题,本研究依托武都西隧道,选取监测断面布置测点,进行拱顶沉降和周边收敛监测。其间利用监测数据绘制拱顶下沉及周边收敛的位移、速率曲线,研究了拱顶沉降和周边收敛的变形规律,并对实测数据进行拟合,获得曲线拟合方程,初步预测变形稳定时的位移值,为类似隧道变形监测及变形规律研究提供借鉴。
关键词:软岩隧道;变形监测;拱顶下沉;周边收敛
中图分类号:U451 文献标识码:A 文章编号:1003-5168(2021)06-0119-04
Deformation Monitoring and Analysis of Tunnel
with Weak Surrounding Rock
ZHAO Xiangling
(Shaanxi Railway Institute,Weinan Shaanxi 714099)
Abstract: Aiming at the problem of soft rock tunnel deformation monitoring, this study relied on the Wuduxi Tunnel, selected the monitoring section to arrange the measuring points, and monitored the settlement of the vault and the surrounding convergence. In the meantime, the monitoring data was used to draw the displacement and velocity curves of the dome subsidence and the surrounding convergence, and the deformation laws of the dome subsidence and surrounding convergence were studied, and the measured data were fitted to obtain the curve fitting equation and preliminarily predict the displacement value when the deformation was stable, so as to provide reference for similar tunnel deformation monitoring and deformation law research.
Keywords: soft rock tunnel;deformation monitoring;dome settlement;peripheral convergence
高速鐵路和高速公路的发展使得山岭隧道逐渐增多,而山岭隧道施工过程中,地质环境存在一定的不确定性,软岩隧道施工往往直接决定整个工程能否按时完成。对于软岩隧道变形规律及监测方法,诸多学者做出了诸多研究。
任博等分析了软弱地层中围岩变形产生的原因,通过统计分析研究了围岩与支护结构的协调关系[1];林锦腾等借助数值模型和现场监测的方法,研究了山岭隧道超浅埋段围岩变形规律[2];王伟等依托在建隧道工程,研究了软弱围岩洞口浅埋段围岩变形控制的问题,得出了基于各施工阶段的超前加固措施[3];赵志刚等研究了围岩变形破坏的特征并分析了原因,提出了隧道大变形控制的有效措施[4];段清超等利用三维激光扫描技术,研究了隧道结构变形的时间、空间等问题[5];刘庆丰等利用区间估计方法,研究了公路隧道变形量分布范围及预留变形量的问题[6];侯公……