Application technique on thrust jacking pressure of shield TBM in the sharp curved tunnel alignment by model tests

Si-on  Kang; Hyeob  Kim; Yong-Min  Kim; Sang-Hwan  Kim

doi:10.9711/KTAJ.2017.19.2.319

All Issue

2017 Vol.19, Issue 2 Preview Page

Application technique on thrust jacking pressure of shield TBM in the sharp curved tunnel alignment by model tests 축소모형실험을 통한 급곡선 터널에서의 Shield TBM 추진 압력 적용 기술에 대한 연구

31 March 2017. pp. 335-353

PDF XML

Abstract

This paper presents the application technique on thrust jacking pressuring of shield TBM in the sharp curved tunnel alignment by model tests. Recently, the application of shield TBM method as mechanized tunnelling is increasing to prevent the vibration and noise problems, which can be occurred in the NATM in the urban area in Korea. However, it is necessary to plan the sharp curved tunnel alignment in order to avoid the building foundation and underground structures, to develop the shield TBM operation technique in the shape curved tunnel alignment. Therefore, the main operation parameters of shield TBM in the curved tunnel alignment are reviewed and analyzed based on the case study and analytical study. The results show that the operation of shield jacking force system is the most important technique in the shape curved tunnel alignment. The simplified scaled model tests are also carried out in order to examine the ground-shield TBM head behaviour. The earth pressures acting on the head of shield TBM are investigated according to two different shield jacking force systems (uniform and un-uniform pressure) and several articulation angles. The results obtained from the model tests are analysed. These results will be very useful to understand the shield TBM head interaction behaviour due to the shield jacking operation technique in the shape curved tunnel alignment, and to develop the operation technique.

Keywords

Shield TBM

Sharp curved tunnel

Shield jack

Articulation jack

Scaled model test

본 연구는 축소모형 실험을 통하여 급곡선 터널에서의 쉴드 TBM 추진압력 적용 기술에 대한 논문이다. 최근 한국의 도심지 지역에서 NATM 터널 공사에 발생하는 진동 및 소음 문제를 예방하기 위해 기계식 터널공법인 쉴드 TBM 공법의 적용이 증가하고 있다. 그러나 건물 기초 및 지하 구조물을 피하기 위해 터널 선형이 급곡선으로 계획하여야 하며 쉴드 TBM 추진압력 시스템에 대한 적용 기술의 개발이 요구된다. 따라서 곡선구간에 대한 쉴드 TBM 굴진 시 영향을 주는 주요 요소들에 대하여 시공자료와 이론적 접근방법에 대하여 검토 및 분석을 실시하였다. 분석결과로부터 쉴드 TBM 추진압력 시스템에 대한 기술이 급곡선 터널에 있어서 가장 중요한 것으로 나타났다. 또한 지반과 쉴드 TBM 헤드부의 상호 거동에 대한 실질적인 상황을 시뮬레이션 하기 위하여 축소모형시험을 실시하였다. 2가지의 서로 다른 쉴드 추진력과 여러 중절각도에 따라 쉴드 TBM 헤드에 가해지는 지반압력에 대하여 측정하였다. 이 실험으로부터 얻어진 결과를 분석하였다. 이들 결과는 급곡구간 터널에서 쉴드 TBM 추진 압력에 따른 쉴드 TBM 헤드부의 상호거동에 대한 이해와 운영 기술 발전에 매우 유용할 것이다.

키워드

쉴드 TBM

급곡선 터널

쉴드잭

중절잭

축소모형실험

References

1.Chang, S.H., Choi, S.W., Park, Y.T., Lee, G.P., Bae, G.J. (2013), “Experimental evaluation of the effects of cutting ring shape on cutter acting forces in a hard rock”, Journal of Korean Tunnelling and Underground Space Association, Vol. 15, No. 3, pp. 225-235.

2.Cho, J.W., Yu, S.H., Jeon, S.K., Chang, S.H. (2008), “Numerical study on rock fragmentation by TBM disk cutter”, Journal of Korean Tunnelling and Underground Space Association, Vol. 10, No. 2, pp. 139-152.

3.Kang, E.M., Kim, Y.M., Hwang, I,J., Kim, S.H. (2015), “A study on the damage of cutter bit due to the rotation speed of shield TBM cutter head in mixed ground”, Journal of Korean Tunnelling and Under-ground Space Association, Vol. 17, No. 3, pp. 403-413.

4.Kim, S.H., Kim W.K., Lee, H.Y. (2013), “Effect of Segment thickness during Shield TBM tunnelling in case study”, Journal of Korean Tunnelling and Underground Space Association, Vol. 15, No. 3, pp. 311-320.

5.Kim, H., Yoon, H.D., Jeon, S.I., Yoon, Y.J., (2002), “The case study on a sharp turn of large diameter shield tunnel”, Proceedings of Symposium on the Mechanized Tunnelling Techniques, Seoul, pp. 79-90.

6.Yoo, K.H., Hwang, D.Y., Chung, S.G., (2007), “A study on engineering characteristics of weak rock ground happened tbm jamming accident in tunnelling”, Journal of the Korean Society of Civil Engineers, Vol. 27, No. 6, pp. 373-381.

7.Yun, D.S., Kim, J.H., Choi, S.C., Lee, M.J., (2011), “A case for domestic development of shield machine and construction”, Proceedings of The 12th KTA International Symposium on Mechanized Tunnelling Technology, Seoul, pp. 169-180.

8.Lee, W.G., Kim, H.I., Jung, B.C., Kim, J.I., Woo, H., (2008), “A construction plan of double shield tbm in steep tunnel and fault zone”, Proceedings of The 9th KTA International Symposium on Mechanized Tunnelling Technology, Seoul, pp. 225-236.

9.Lim, Y.D., Cho, D.H., Jeon, Y.J., Ryu, J.Y., (2008), “Troubles and improvements of cable structure design”, Proceedings of The 9th KTA International Symposium on Mechanized Tunnelling Technology, Seoul, pp. 37-107.

10.Korean Tunnelling Association (2008), Mechanized tunnelling method : design, CIR, Seoul, pp. 85-107.

11.Korean Tunnelling Association (2015), Standard specification of tunnelling, CIR, pp. 110-115 .

12.Broere, W., Faassen, T.F., Arends, G., van Tol, A.F., (2007), “Modelling the boring of curves in (very) soft soils during microtunnelling”, Tunnelling and Underground Space Technology, Vol. 22, Issures 5-6, pp. 600-609.

13.Kongshu, D., Xiaoqiang, T., Liping W., Xu, C., (2011), “Force transmission characteristics for the non- equidistant arrangement thrust systems of shield tunneling machines”, Automation in Construction, Vol. 20, pp. 588-595.

14.Sugimoto, Sramoon, A., Konishi, S., Sato, Y., (2007), “Simulation of Shield Tunneling Behavior along a Curved Alignment in a Multilayered Ground”, Journal of Geotechnical and Geoenvironmental Engineering, Vol. 133, Issue 6, pp. 684-694.

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 : 19
No :2
Pages :335-353
Received Date : 2017-03-20
Revised Date : 2017-03-29
Accepted Date : 2017-03-30
DOI :https://doi.org/10.9711/KTAJ.2017.19.2.319

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

All Issue