大坡度隧道轴线检测方法探析  

Analysis of Steep Slope Tunnel Axis Detection Method

作　　者：苏京平 SU Jingping(Shanghai Shannan Investigation&Design Co.,Ltd.,Shanghai 201206,China)

机构地区：[1]上海山南勘测设计有限公司,上海201206

出　　处：《城市勘测》2022年第5期142-145,共4页Urban Geotechnical Investigation & Surveying

摘　　要：针对大坡度隧道轴线检测实际遇到的困难,提出了一种检测方法,该方法利用盾构环片接缝边缘确定隧道断面采集平面,建立空间独立坐标系,以最小二乘法拟合空间圆,准确测定隧道空间轴线位置,再通过坐标系转换,最终将任意坐标系中的圆心坐标换算为施工坐标系坐标,从而判断隧道施工轴线位置与设计位置的偏差是否满足施工精度要求。其理论模型严密,较以往检测方案更能够真实反映隧道轴线施工偏差情况,测量误差影响小、解算精度高、实施成本低。This paper proposes a set of comprehensive solutions for the difficulties encountered in the detection of the axis detection of a steep slope tunnel.By using shield segment joint to determine plane of tunnel section,establishing a spatial independent coordinate system,and fitting the space circle with the least square method,the position of the tunnel axis in space can be accurately determined.Then through transforming the coordinate system,the coordinates in construction coordinate system can be converted from the circle center coordinates in any coordinate systems.Therefore,it can be determined whether the deviation between the designed position and the location of tunnel construction axis meets the requirements of construction accuracy.Its theoretical model is rigorous.Compared with previous detection scheme,it can truly reflect the deviation during tunnel axis,with small measurement error impact,high resolution accuracy,and low implementation cost.

关 键 词：大坡度隧道 轴线检测 独立坐标系 坐标系转换 

分 类 号：P258[天文地球—测绘科学与技术]