Proceedings of the Korean Geotechical Society Conference (한국지반공학회:학술대회논문집)
- 2003.03a
- /
- Pages.681-688
- /
- 2003
Effect of Rock Damage Induced by Blasting on Tunnel Stability
발파굴착의 암반손상이 터널안정성에 미치는 영향분석
-
Lee, In-Mo
(Dept. of Civil Eng., Korea Univ.)
;
- Yoon, Hyun-Jin (BAU Consultant Co., LTD.) ;
-
Kim, Dong-Hyun
(SAMBO Engineering Co., LTD.)
;
- Lee, Sang-Don (Highway & Trans. Tech. Institute) ;
- Park, Bong-Ki (Korea Univ.)
-
이인모
(고려대학교 공과대학 토목환경공학과)
;
- 윤현진 ((주)바우컨설턴트 기술연구소) ;
-
김동현
((주)삼보기술단 지반공학부)
;
- 이상돈 (한국도로공사 도로교통기술원) ;
- 박봉기 (고려대학교 공과대학 토목환경공학과, (주)에스코컨설턴트)
- Published : 2003.03.01
Abstract
Rock damage induced by blasting can not be avoided during tunnel construction and may affect tunnel stability. But the mutual interaction between tunnel blasting design and tunnel stability design is generally not considered. Therefore this study propose a methodology to take into considration the results of the blasting damage in tunnel stability design. Rock damage is evaluated by dynamic numerical analysis for the most common blasting pattern adopted in road tunnel. Damage zone is determined by using the continuum damage model which is expressed as a function of volumetric strain. And the damage effect is taken into account by the damaged rock stiffness and the damaged failure criteria in tunnel stability assessment. The extend of plastic zone and deformation increase compared to the case of not considering blast-induced rock damage.