DOI QR코드

DOI QR Code

Relations between Initial Displacement Rate and Final Displacement of Arch Settlement and Convergence of a Shallow Tunnel

저심도 터널의 천단침하 및 내공변위의 초기변위속도와 최종변위의 관계

  • Kim, Cheehwan (Department of Civil and Environmental Engineering, Woosuk University)
  • 김치환 (우석대학교 토목공학과)
  • Received : 2013.03.22
  • Accepted : 2013.04.22
  • Published : 2013.04.30

Abstract

It is generalized to measure the arch settlement and convergence during tunnel construction for monitoring its mechanical stability. The initial convergence rate a day is defined from the first convergence measurement and the final convergence defined as the convergence measured lastly. The initial and the final tunnel arch settlement are defined like the preceding convergence. In the study, the relations between the initial and final displacements of a shallow tunnel are analyzed. The measurements were performed in the tunnel of subway 906 construction site in Seoul. The overburden is 10-20 m and the tunnel goes through weathered soil/rock. The width and height of the tunnel are about 11.5 m, 10m, respectively. So this is a shallow tunnel in weak rock. The length of tunnel is about 1,820 m and the tunnel was constructed in 2 stages, dividing upper and lower half. The numbers of measurement locations of arch settlement and convergence are 184 and 258, respectively. As a result, the initial displacement rate and the final displacement are comparatively larger in the section of weathered soil.

Acknowledgement

Supported by : 우석대학교

References

  1. 김상수 역, 1992, 도시터널의 NATM공법, 창우출판.
  2. 대림산업주식회사, 2003a, 지하철 9호선 6공구 지질조사 보고서.
  3. 대림산업주식회사, 2003b, 지하철 9호선 6공구 설계보고서.
  4. 대림산업주식회사, 2006a, 지하철 9호선 6공구 계측분석 보고서
  5. 대림산업주식회사, 2006b, 지상건물 하부통과 터널구간의 계측치 추세예측 및 역해석.
  6. 심현진, 한일영, 김경태, 장기태, 2007, 분포형 광섬유센서를 이용한 터널 내공변위 측정에 관한 연구, 한국암반공학회 특별 심포지엄, pp. 174-187.
  7. Chung So Keul, 2005, Convergence monitoring technologies fir traffic tunnels-state of the art. Tunnel & Underground Space, Journal of Korean Society for Rock Mechanics, Vol. 15, No. 1, pp. 1-8.
  8. Kim Cheehwan, 1990, Stress analysis and deformation behaviour of rock around underground cavern by back analysis of field measurements. Ph.D Thesis, Seoul National University.
  9. Kim Cheehwan, 2005, Stability analysis on the intersection area of subway tunnels by observational method. Tunnel & Underground Space, Journal of Korean Society for Rock Mechanics, Vol. 15, No. 1, pp. 71-79.
  10. Kim Cheehwan, 2010, Forecasting final displacement with displacement function using deformation measurements while constructing a tunnel. Tunnel & Underground Space, Journal of Korean Society for Rock Mechanics, Vol. 20, No. 6, pp. 408-420.
  11. Kim Ho Yeong, Park Eui Seob, 1993, Theory and analysis method of tunnel convergence. Tunnel & Underground Space, Journal of Korean Society for Rock Mechanics, Vol. 3, pp. 80-95.
  12. Kim Jong Woo, 2003, Estimation of tunnel convergence using statistical analysis. Tunnel & Underground Space, Journal of Korean Society for Rock Mechanics, Vol. 13, No. 2, pp. 108-116
  13. Kim Ki Sun, Kim Young Sub, You Kwang Ho, Park Yoen Jun, Lee Dae Hyuck, 2003, Prediction of change in ground condition ahead of tunnel face using threedimensional convergence analysis. Tunnel & Underground Space, Journal of Korean Society for Rock Mechanics, Vol. 13, No. 6, pp. 476-485.
  14. Kim Kwang Yeom, Kim Ho Geun, Seo Young Seok, 2012, Influence of zero reading on predicting crown displacement of tunnel. Tunnel & Underground Space, Journal of Korean Society for Rock Mechanics, Vol. 22, No. 3, pp. 214-220. https://doi.org/10.7474/TUS.2012.22.3.214
  15. Moon Seung Beak, Song Seoung Gon, Yang Hyung Sik, Jeon Yang Soo, Han Gong Chang, 2001, A numerical analysis study for the prediction of convergence and characteristics of subsidence behavior in shallow, wide tunnel excavation. Tunnel & Underground Space, Journal of Korean Society for Rock Mechanics, Vol. 11, No. 1, pp. 20-29.
  16. Nam Kee Chun, Heo Young, Kim Chi Whan, You Kwang Ho, 2002, The behavior of soil tunnels reinforced with RPUM and fiber glass. Tunnel Technology, Korean Tunnelling Association, Vol. 4, No. 3, pp. 185-193.
  17. Nam Kee Chun, 2002, A study on the reinforced protection to control extrusion at the face of shallow tunnels. Ph.D Thesis, Suwon University, pp. 57-71.
  18. Song Seung Gon, Yang Hyung Sik, Lim Seoung Sik, Chung So Keul, 2002, Estimation of final deformation of hard rock tunnel using early measured deformation. Tunnel & Underground Space, Journal of Korean Society for Rock Mechanics, Vol. 12, No. 2, pp. 99-106.

Cited by

  1. Characteristics of Subsidence above a Shallow Tunnel Excavated in Weathered Rock Mass vol.23, pp.5, 2013, https://doi.org/10.7474/TUS.2013.23.5.337
  2. Case Study of a Shallow Tunnelling Through Complex Strata of Sand-Gravel and Rock Mass vol.25, pp.3, 2015, https://doi.org/10.7474/TUS.2015.25.3.244