微变监测在营运中隧道稳定评估之应用  

The application of Micro-transformer monitor for the operation of the tunnel stability assessment

作　　者：王泰典[1] 庄海岳 邱雅筑[3] 李佳翰[1] 郑富书[3] 

机构地区：[1]台北科技大学 [2]銾欣有限公司 [3]台湾大学

出　　处：《建筑监督检测与造价》2009年第10期28-35,共8页Supervision Test and Cost of Construction

摘　　要：衬砌异状肇因的分析作业为营运中隧道安全评估的基础,亦为确保隧道结构安全稳定所需维修补强的关键信息。而隧道周围的外力变化为各种影响隧道稳定的因素中至为关键的一项,且为补强设计之直接依据。本研究基于运动学观点分离隧道位移为刚体运动与变形两大分量,再探讨隧道周围不同应力变化造成的变形特性,建立衬砌变形特征曲线。继而依据隧道变形机制与衬砌变形特征曲线的关系,结合差分全球定位系统(Differential global positioning system,DGPS)与新型全测站之自动目标识别、照准及放样功能,高精度地测量隧道剖面3D绝对坐标,并透过前后测量结果求得衬砌变形曲线,比对典型衬砌变形特征曲线,从而掌握隧道周围应力变化之趋势。经案例应用结果显示,本研究所提微变监测可成功推测隧道剖面变形的机制,有助于提供量化的隧道检测数据。The analysis causes of lining unusual form is the base of safety assessment for operating in tunnel,it is also to ensure the security and stability of the tunnel structure for maintenance required reinforcement of key messages.The tunnel surrounding changes in a variety of external factors that affect the stability of the tunnel is critical,and is the direct basis for the reinforcement design.This research based on Kinematic point of view of separation of the tunnel displacement of a rigid body motion and deformation of the two major components,and then explored the different stress around the tunnel deformation caused by changes in the establishment of lining deformation characteristic curves.Then based on the tunnel lining deformation mechanism and the relationship between the deformation characteristic curve,combined with a differential global positioning system (Differential global positioning system,DGPS) with the new station's full-automatic target recognition,and lofting features,high-precision 3D measurement of the tunnel cross-section is absolutely coordinates,compared with the typical characteristics of lining deformation curve,and thus grasp the trend of stress changes around the tunnel.The case application results show that micro-transformer monitoring mentioned in this study speculated that the tunnel can be successfully cross-section deformation mechanism,to help provide quantitative tunnel test data.

关 键 词：隧道 安全检测 安全评估 微变监测 

分 类 号：U456.3[建筑科学—桥梁与隧道工程]