Proceedings of the Korean Geotechical Society Conference (한국지반공학회:학술대회논문집)
- 1991.10a
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- Pages.152-165
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- 1991
굴착 진행과정을 고려한 터널 단면의 점탄성 및 탄소성 응력해석
- Lee, Yeon-Gyu (Seoul National University) ;
- Jang, Hyeon-Gon (Seoul National University) ;
- Lee, Jeong-In
- Published : 1991.10.01
Abstract
Elasto-plastic and Visco-elastic sytress analyses were conducted for standard cross-section of subway tunnel in Seoul . Considering the procedure of excavation and reinforcement, excavated region was divided to multiple elements. And the progress of tunnel is simulated to be the removal of a series of layerd elements by means of diminishing the stiffness of the portion progressively. Another method is to be free of stress due to excavation instead of stiffness. In the analysis multiple element method was conducted with ADINA program, the stiffness removal method was adopted . For the same model, stress release method was carried out with Visco-Elastic Analysis program developed in Rock mechanics laboratory, Seoul National University(SNU-VBA) . When upper tunnel excavated, displacements in roof were same for two results, but when bottom tunnel removed completely , displacement changes of rock in the stress release method exhibited very small amount compared with stiffness removal method.
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