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Research Article

Analysis of Support Behavior in Parallel Tunnels Under Varying Lateral Pressure Coefficients and Earth Pressure

측압계수 및 편토압 변화에 따른 병설 터널의 지보재 거동 분석

Hak-Beom Lee1
,
Chan-Young Park2
,
Seung-Joo Lee3
,
YoungSeok Kim4
,
Da-Bin Kwon5
,
Ja-Yong Choi5
,
Seong-Lim Lee2
,
Yong-Seong Kim6*
이 학범1
,
박 찬영2
,
이 승주3
,
김 영석4
,
권 다빈5
,
최 자용5
,
이 성림2
,
김 용성6*
1Member, Researcher, Korea Railroad Technical Corporation, Gwacheon-daero 7na-gil, Gwacheon-si, Gyeonggi-do 13840, Republic of Korea 26466
2Member, Ph.D Candidate, Department of Regional Infrastructure Engineering, Kangwon National Univ., 1 Kangwondaehak-gil, Chuncheon, Gangwon-do 24341, Republic of Korea
3Member, Researcher, Korean Peninsula Infrastructure Research Center, Department of Construction Policy Research, Korea Institute of Civil Engineering and Building Technology, 283 Goyang-Daero, Ilsanseo-Gu, Goyang-Si, Gyeonggi-Do 10223, Republic of Korea
4Member, Senior Research Fellow, Department of Geotechnical Engineering Research, Korea Institute of Civil Engineering and Building Technology, 283 Goyang-Daero, Ilsanseo-Gu, Goyang-Si, Gyeonggi-Do 10223, Republic of Korea
5Member, Master Student, Department of Regional Infrastructure Engineering, Kangwon National Univ., 1 Kangwondaehak-gil, Chuncheon, Gangwon-do 24341, Republic of Korea
6Member, Professor, Department of Regional Infrastructure Engineering, Kangwon National Univ., 1 Kangwondaehak-gil, Chuncheon, Gangwon-do 24341, Republic of Korea
*Corresponding Author
30 March 2025. pp. 121-138
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Abstract

In this study, GTS NX numerical analysis was conducted to analyze the effects of the lateral pressure coefficient and earth pressure on tunnel behavior. The results showed that as the lateral pressure coefficient increased, both the tunnel's convergence and crown displacement also increased, with the largest displacement observed at a coefficient of 2.0. Additionally, as the terrain slope increased, tunnel displacement tended to grow; however, the rate of increase diminished beyond a 30° slope. The analysis of rock bolt axial force revealed asymmetric behavior, with the side of the tunnel experiencing greater earth pressure exhibiting higher stress than the other side. The maximum axial force occurred at the upper sections of the rock bolts on both the left and right sides for slopes exceeding 30°. Through this study, the influence of lateral pressure coefficient and earth pressure variations on tunnel stability was quantitatively analyzed.

Keywords
Tunnel behavior
Lateral earth pressure coefficient
Terrain slope
Rockbolt axial force
Numerical analysis

본 연구에서는 측압계수와 편토압이 터널 거동에 미치는 영향을 분석하고 안정성 확보를 위한 대책방안을 마련하기 위해 GTS NX 수치해석을 활용하여 다양한 지형 조건에서 측압계수 변화에 따른 터널 및 지보재의 거동을 분석하였다. 연구 결과, 측압계수가 증가할수록 터널의 내공 변위와 전단 변위가 증가하는 경향을 보였으며, 특히 측압계수 2.0에서 변위가 가장 크게 나타났다. 또한, 지형 경사가 증가할수록 터널 변위가 커졌으나, 경사 30°이상에서는 증가율이 감소하는 경향을 보였다. 록볼트의 축력 분석 결과, 더 큰 토압을 받는 터널측이 적은 토압을 받는 터널측보다 높은 응력을 받는 비대칭적 거동을 나타냈으며, 최대 축력은 경사 30°이상에서 좌측과 우측 상단부 록볼트에서 발생하였다. 본 연구를 통해 측압계수 및 편토압 변화가 터널 안정성에 미치는 영향을 정량적으로 분석하였으며, 향후 실제 시공 현장의 계측 데이터를 활용한 추가적인 검증이 필요할 것으로 판단된다.

References
1

Ahn, H. H., Suh, B. W., Lee, S. W. and Kim, D. H. (2006), "Influence of eccentric load on stability of tunnel using scaled model tests", Journal of the Korean Society of Civil Engineers, pp.3259-3262.

2

Bae, S. H., Jeon, S. W., Choi, Y. G. and Kim, H. S. (2002), "Study on characteristics of in-situ rock stress state in mountainous region by hydraulic fracturing method", Journal of Korean Tunnelling and Underground Space Association, Vol.4, No.1, pp.57-70.

3

Choi, S. W., Park, C., Bae, J. S., Park, J. I. and Shin, H. S. (1999), "In-situ stress determinations by hydraulic fracturing in deep inclined boreholes for the design of underground oil storages", Journal of the Korean Geotechnical Society, Vol.15, No.4, pp.185-205.

4

Jung, H. R. and Kim, J. W. (2006), "Deformation behaviors around tunnel in anisotropic rocks considering joint orentation and rock pressure condition using scaled model tests", Juornal of Korean Society for Rock Mechanics, Vol.16, No.4, pp.313-325.

5

Kim, Y. S., Moon, H. D., Jung, W. S. and Yoon, J. W. (2004), "The behavior of cut-and cover tunnel subjected to differential settlement under declinating earth pressure", Journal of the Korean Society of Civil Engineers, Vol.24, No.4, pp.259-265.

6

Korean tunneling association (2004), Theory and practice of tunnels, pp.107-108.

7

Lee, J. H., Seo, S. W., Zo, B. H. and Hwang, Y. C. (2015), "Perspectives on the application of lateral earth pressure coefficient in tunnel numerical analysis for soil ground", Magazine of Korean Tunnelling and Underground Space Association, Vol.17, No.4, pp.13-23.

10.9711/KTAJ.2015.17.6.653
8

Lee, Y. J. and Lee, S. D. (2010), "Pillar width of twin tunnels in horizontal jointed rock using large scale model tests", Journal of Korean Society for Rock Mechanics, Vol.20, No.5, pp.352-359.

9

You, K. H., Jung, J. S. and Park, Y. J. (2009), "A study on the bending stresses of tunnel shotcrete due to the coefficient of lateral earth pressure", Korean Tunnelling and Underground Space Association, Vol.11, No.1 pp.23-35.

Information
  • Publisher :Korean Geosythetics Society
  • Publisher(Ko) :한국지반신소재학회
  • Journal Title :Journal of the Korean Geosynthetics Society
  • Journal Title(Ko) :한국지반신소재학회 논문집
  • Volume : 24
  • No :1
  • Pages :121-138
  • Received Date : 2025-02-10
  • Revised Date : 2025-03-18
  • Accepted Date : 2025-03-25
  • DOI :https://doi.org/10.12814/jkgss.2025.24.1.121
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