@inproceedings{c97d31d5da4f4acd9d8a2d3c7f50c1e0,
title = "Stability evaluation on widening of parallel tunnels",
abstract = "Widening of tunnels in urban areas, instead of building newtunnels,may become a viable solution for reducing traffic congestion. In the present study, a numerical investigation using FEM was conducted to examine the effect of tunnel widening on the stability. For the purpose, parallel tunnels were analyzed by considering four different widening types. For each case, stress and deformation behaviors of the tunnels were examined and the pillar stabilitywas evaluated.The results indicated that comparing between the tunnel widening cases with the same pillar width after widening, 5 to 20% higher crown settlement was occurred for the tunnels widened uni-laterally than those widened bi-laterally. As expected, the highest shotcrete stress was observed for the tunnels widened to have the narrowest pillar. For all four widening cases, however, the strength/stress ratios for pillar were found to have the values higher than 1.0.",
author = "Lee, {Myeong Han} and Koh, {Sung Yil} and Kim, {Bum Joo} and Jang, {Yeon Soo} and Yun, {Ji Nam}",
year = "2014",
doi = "10.1201/b17240-50",
language = "English",
isbn = "9781138027008",
series = "Geotechnical Aspects of Underground Construction in Soft Ground - Proceedings of the 8th Int. Symposium on Geotechnical Aspects of Underground Construction in Soft Ground, TC204 ISSMGE - IS-SEOUL 2014",
publisher = "Taylor and Francis - Balkema",
pages = "269--273",
booktitle = "Geotechnical Aspects of Underground Construction in Soft Ground - Proceedings of the 8th Int. Symposium on Geotechnical Aspects of Underground Construction in Soft Ground, TC204 ISSMGE - IS-SEOUL 2014",
note = "8th International Symposium on Geotechnical Aspects of Underground Construction in Soft Ground, TC204 ISSMGE - IS-SEOUL 2014 ; Conference date: 25-08-2014 Through 27-08-2014",
}