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張志剛，賈慧超，李志達

（ 河北省高速公路延崇管理中心 ，河北 張家口 075000)

摘 要： 因高速公路隧道在使用過程中容易產生橫向、縱向形變，易產生高速公路隧道安全問題，為此， 提出一種基于內壁點云切片坐標的高速公路隧道整體變形監測方法。采用投影平面方式將內壁實現點云信息分層，令各段點云映射到中心位置的參考平面，提取內壁點云信息，運用最小二乘法擬合隧道平面，使用格網化內插值算出各點云內插值，通過各時間點網格內插值變化情況，判斷出該隧道變形相關量，根據網格平面所在位置得出變形位置，完成隧道整體變形監測。結果表明：所提方法的監測信息數量和計算時間分別為9921個和 6. 21s , 能夠敏銳感知細微隧道變形，監測效率最高，具有較高實用性與有效性，該方法可有效提高高速公路隧 道交通運行的安全性。

關鍵詞：內壁點云切片坐標；隧道變形監測；橫斷面擬合；內壁點云降維；格網化內插值

中圖分類號：U456. 3 + 1 

文獻標志碼：A 

文章編號：1005- 8249 (2024) 03- 0146- 06

DOI：10. 19860/j.cnki.issn1005 - 8249.2024.03 .028

ZHANG Zhigang , JIA Huichao , LI Zhida

(Hebei Expressway Yanchong Management Center , Zhangjiakou 075000 , China)

Abstract : Because of the complexity of highway tunnel structure , it is easy to produce transverse and longitudinal deformation in the use process , resulting in low safety of highway tunnel. For this reason , a method for monitoring the overall deformation of expressway tunnels based on the slice coordinates of point clouds on the inner wall is proposed. The projection plane method is used to layer the point cloud information on the inner wall , so that each segment of the point cloud is mapped to the reference plane of the center position , and the point cloud information on the inner wall is extracted. The least square method is used to fit the highway tunnel plane , and the grid interpolation is used to calculate the interpolation of each point cloud. Through the change of the grid interpolation at each time point , the deformation related quantity of the tunnel is judged , and the deformation position is obtained according to the location of the grid plane , Complete the overall deformation monitoring of expressway tunnels. The experimental results show that the amount of monitoring information and the calculation time of the proposed method are 9921 and 6. 21s respectively , which can sensitively perceive the subtle tunnel deformation. The monitoring efficiency is the highest , and the method has high practicability and effectiveness. The method can effectively improve the safety of highway tunnel traffic operation in various cities.

Keywords : slice coordinates of inner wall point cloud; tunnel deformation monitoring; cross section fitting;dimension reduction of inner wall point cloud; grid interpolation

*基金項目：河北省科技成果轉化專項 (202053012) 。

作者簡介： 張志剛 (1973—) , 男，本科，教授級高級工程師，研究方向：道路橋梁工程。 

收稿日期：2023-01-24