An experimental study on the behavior of tunnel excavated in a jointed mass by two-stage excavation

Seung-Jun Park; Dong-Gab* Kim; Sang-Duk Lee

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2004 Vol.6, Issue 4 Preview Page Next Page

An experimental study on the behavior of tunnel excavated in a jointed mass by two-stage excavation 절리 지반에서 2단계로 굴착되는 터널의 거동특성에 대한 실험적연구

31 December 2004. pp. 303-314

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Abstract

This study is intended to investigate the geotechnical behavior of jointed mass on tunnel excavation experimentally. Laboratory test were conducted in various conditions of distance from joint to tunnel and in-situ stress ratio (). In case, the ground around the tunnel that has the joint angle 90° generate the greatest influence in crown and far shoulder from joint. If the in-situ stress ratio is low, tangential stress of side wall that is opposite side of the joint is increased more than in crown. Otherwise in case, joint angle 45°, the generated compress stress is found out that left side of the tunnel of near the joint has influence on stability of the tunnel about 3 times than non-jointed rock.

Keywords

Jointed mass

experimental study

joint angle

본 연구에서는 터널을 굴착할 때 절리가 있는 암반의 역학적 거동특성을 실험적으로 규명하고자 하였다. 절리와 터널의 이격거리, 측압계수를 변화시키며 실험을 수행하였다. 터널주변에 수직절리가 있는 경우 천단부와 수직절리 반대편의 어깨부에서 가장 큰 영향이 발생되며 측압이 작을 경우에는 천단부 보다 절리 반대편 측벽부에서 접선 방향의 응력이 크게 증가된다. 반면 45°의 경사절리가 있는 경우 발생하는 압축응력은 절리면 방향의 터널 좌측부가 무절리 상태의 3배정도로 터널의 안정성에 큰 영향을 미치는 것으로 나타났다.

키워드

절리지반

실험적 연구

절리각도

References

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Information

Publisher :Korean Tunneling and Underground Space Association
Publisher(Ko) :한국터널지하공간학회
Journal Title :Journal of Korean Tunnelling and Underground Space Association
Journal Title(Ko) :한국터널지하공간학회 논문집
Volume : 6
No :4
Pages :303-314

Journal of Korean Tunnelling and Underground Space Association ISSN:2233-8292(Print) 2287-4747(Online) 한국터널지하공간학회 논문집

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