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http://dx.doi.org/10.12814/jkgss.2022.21.4.021

Study on Structural Stability Analysis of Excavation Stage Considering Excavation Process and Supporting Materials in Room-and-Pillar Underground Space  

Soon-Wook, Choi (Department of Geotechnical Engineering Research, Korea Institute of Civil Engineering and Building Technology)
Soo-Ho, Chang (Department of Geotechnical Engineering Research, Korea Institute of Civil Engineering and Building Technology)
Tae-Ho, Kang (Department of Geotechnical Engineering Research, Korea Institute of Civil Engineering and Building Technology)
Chulho, Lee (Department of Geotechnical Engineering Research, Korea Institute of Civil Engineering and Building Technology)
Publication Information
Journal of the Korean Geosynthetics Society / v.21, no.4, 2022 , pp. 21-29 More about this Journal
Abstract
The room-and-pillar method or grid-type underground space is a method of forming a space by excavating the excavation part at regular intervals so that it is orthogonal and using natural rock mass as a structure. Such excavation may appear different in size from the excavation stage where the maximum displacement occurs depending on the excavation direction and sequence. In this study, considering the installation of support materials such as shotcrete and rock bolts for the optimal design of the excavation process, the safety and constructability of the design and construction of the grid-type underground space under specific ground conditions were analytically reviewed. The ground conditions were set using an numerical method, and the stress at pillar and displacement at center of room were considered for each excavation stage and construction type under a constant surcharge. The height of the space was 8m, which was set higher than the size of a general office, and was reviewed in consideration of equipment and plant facilities. In addition, the degree of displacement control according to the installation of support materials was reviewed in consideration of shotcrete and rock bolts.
Keywords
Room-and-Pillar method; Support; Numerical analysis; Shotcrete; Excavation;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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