基于三维激光扫描的隧洞开挖衬砌质量检测技术及其工程应用

doi:10.13722/j.cnki.jrme.2016.0597

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摘要

采用三维激光扫描技术对长河坝2^#泄洪洞开挖围岩和衬砌过流表面进行扫描测量，通过改进的ICP法对三维点云进行配准，并针对开挖围岩及衬砌过流表面体型的特点分别利用三角网格法及NURBS算法进行隧洞三维表面模型的构建。通过对开挖围岩的扫描三维表面模型与设计三维表面模型的布尔逻辑运算，精确测量洞室开挖围岩的超欠挖量，其与传统测量结果比较接近，同时测量结果还表明隧洞超欠挖量受地质条件与岩体质量影响较大。通过4个衬砌洞段扫描三维模型的切割断面与设计过流断面的比对分析发现，洞室衬砌体型偏差不仅与浇筑质量控制有关，还与前期围岩开挖质量有关，同时衬砌混凝土的变形也是一个重要影响因素，但最大体型偏差均控制在10 mm以内，基本满足设计要求。

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	李海波1
	杨兴国1
	赵伟2
	黄康鑫3
	周家文1

关键词 ：隧道工程, 三维激光扫描, 布尔逻辑运算, 超欠挖, 体型偏差

Abstract：

The 3D laser scanning technology makes up for this shortcomings which can be used to obtain the spatial information of objects rapidly，precisely and comprehensively. By using of 3D laser scanner，the spatial information of surrounding rocks and lining of the Changheba #2 flood discharging tunnel is sampled，and the improved ICP algorithm is used for point clouds registration，then according to the surrounding rock mass and lining surface features，3D excavation tunnel model and lining model are established by delaunay triangular meshes algorithm and NURBS algorithm，respectively. Based on the Boolean logic operation between established models and design models，the over-under-excavated values are measured accurately，and the measured results indicate that，the tunnel over-excavated degree is influenced by the geological condition and the quality of rock masses. Through the analysis of shape deviations at four lining tunnel model segments by comparing with design sections，the result shows that the deviation of lining shape relate to not only pouring quality but also excavation quality，besides，the influence of lining deformation can not be ignored. Measurement results show that the shape deviations are well controlled and the maximum deviation is less than 10 mm，which are meeting the design requirements.

Key words： tunnelling engineering 3D laser scanning Boolean logic operation over-under-excavated values shape deviation

引用本文:

李海波1，杨兴国1，赵伟2，黄康鑫3，周家文1. 基于三维激光扫描的隧洞开挖衬砌质量检测技术及其工程应用[J]. 岩石力学与工程学报, 2017, 36(S1): 3456-3463.
LI Haibo1，YANG Xingguo1，ZHAO Wei2，HUANG Kangxin3，ZHOU Jiawen1. Measurement technology and its application for tunnel excavation and lining quality based on 3D laser scanning. , 2017, 36(S1): 3456-3463.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2016.0597 或 https://rockmech.whrsm.ac.cn/CN/Y2017/V36/IS1/3456

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