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http://dx.doi.org/10.9711/KTAJ.2019.21.3.397

Measurement of ground behaviour due to tunnelling using No-target program in laboratory model test  

Lee, Jong-Hyun (Dept. of Civil Engineering, Seoul National University of Science and Technology)
Lee, Chang-No (Dept. of Civil Engineering, Seoul National University of Science and Technology)
Lee, Yong-Joo (Dept. of Civil Engineering, Seoul National University of Science and Technology)
Publication Information
Journal of Korean Tunnelling and Underground Space Association / v.21, no.3, 2019 , pp. 397-418 More about this Journal
Abstract
It is very important to understand and analyze the interactive behaviour between ground and adjacent structures due to tunneling. With many technological advancement in modern society, numerous methods for analyzing the interactive behaviour are used in a wide range of civil engineering fields. Close range photogrammetry is mainly being used in the field of geotechnical engineering and research on measuring methods associated with GeoPIV has been currently increased. Originally, the close range photogrammetry using target points and aluminum rods for VMS (Vision Measurement System) program has been used. However, applying this has a problem that external errors can be occurred because the target points are artificially installed by hand, and if the grid between points is being wider or narrower, deficient data can be obtained. Therefore, in this study, MATLAB-based No-target program that can analyze displacement without using target was developed. Additionally, this study focused on comparison and verification with existing program through numerical analysis and laboratory model test. Three cases of Greenfield condition, Strip foundation, and Pile foundation were analyzed. From results of VMS program and No-target program, the error rate and reliability of the total displacement and the vertical displacement were analyzed. It was also compared and verified through the finite element numerical program, PLAXIS.
Keywords
Tunnel excavation; Close range photogrammetry; No-target; Laboratory model test; Finite element analysis;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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