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2016 Vol.18, Issue 2 Preview Page
Geotechnical investigation on causes and mitigation of ground subsidence during underground structure construction

터널 및 지중매설물 시공에 따른 지반함몰 발생 원인 및 대책에 대한 지반공학적 조사 연구

Shin-Kyu Choi1
,
Seung-Hun Back2
,
Jun-Beom An3
,
Tae-Hyuk Kwon4*
최 신규1
,
백 승훈2
,
안 준범3
,
권 태혁4*
1KAIST, Dept. of Civil and Environmental Engineering, Graduate Student
2KAIST, Dept. of Civil and Environmental Engineering, Graduate Student
3KAIST, Dept. of Civil and Environmental Engineering, Undergraduate Student
4KAIST, Dept. of Civil and Environmental Engineering, Assistant Professor
1한국과학기술원 건설및환경공학과 석사과정
2한국과학기술원 건설및환경공학과 석사과정
3한국과학기술원 건설및환경공학과 학사과정
4한국과학기술원 건설및환경공학과 조교수
*교신저자. *Corresponding Author. 
31 March 2016. pp. 143-154
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Abstract

This study investigated the occurrences, causes, and mitigation of the recent ground subsidence and underground cavity generation events in Korea. Two main causes of ground subsidence are (1) the soil erosion by seepage during tunneling and earth excavation and (2) the damage of underground pipes. The main cause of the soil erosion during tunneling was the uncontrolled groundwater flow. Especially, when excavating soft grounds using a tunnel boring machine (TBM), the ground near TBM operation halt points were found to be the most vulnerable to failure. The damage of underground pipes was mainly caused by poor construction, material deterioration, and differential settlement in soft soils. The ground subsidence during tunneling and earth excavation can be managed by monitoring the outflow of groundwater and eroded soils in construction sites. It is expected that the ground subsidence by the underground pipe damage can be managed or mitigated by life cycle analysis and maintenance of the buried pipes, and by controlling the earth pressure distribution or increasing the bearing capacity at the upper ground of the buried pipes.

Keywords
Ground subsidence
Tunneling
Excavation
Underground pipes
Seepage

최근 국내 빈번하게 발생되고 있는 지반함몰 현상의 원인, 현황, 대책에 대하여 지반공학적인 접근 방법으로 조사하였다. 국내 발생된 지반함몰은 대부분 터널 굴착 공사와 지중매설관의 손상에 의한 것으로 나타났다. 용산역과 석촌 지하차도 지반함몰 사례와 같이, 굴착 공사 중 지반함몰은 지하수와 토사의 과다 유출이 주된 원인으로 나타났다. 특히, 충적층과 같은 연약지반에서의 기계식 굴착 시, TBM 굴착이 멈춘 지점에서 지반함몰 위험이 큰 것으로 나타났다. 서울시에서 발생된 지중매설관 손상으로 인한 지반함몰 사고를 종합하였을 때, 시공 시의 부주의, 노후화, 연약지반에서의 관의 부등침하 등이 지반함몰의 원인으로 나타났다. 터널 굴착 공사에 의한 지반함몰은 공사 시 발생되는 지하수, 토사의 이동에 대한 모니터링을 통해 대비할 수 있다. 지중매설관 손상으로 인한 지반함몰은 지중매설관의 생애주기 분석 및 유지관리 혹은 관 상부의 토압 분산 및 토압 지지력 증대를 통하여 대비할 수 있을 것으로 판단된다.

키워드
지반 함몰
터널링
굴착
지중매설관
지하수 흐름
References
1
1.Chae, D.H., Kim, K.O., Shin, H.Y., Cho, W.J. (2014), “Dynamic characteristics of liquidity filling materials mixed with reclaimed ash”, Korean Geo-Environmental Society, Vol. 15, No. 4, pp. 5-11.
2
2.Cho, Y.H., Kim, C.K., Chun, B.S. (2011), “A study on the characteristics of alkali silica sol grouting material”, Korean Geo-Environmental Society, Vol. 12, No. 4, pp. 17-24.
3
3.Choi, C.Y., Lee, J.W., Kim, H.K., Lee, S.D. (2009), “Behavior of soil corrugated steel bridge with cyclic loading using full scale model test”, Korean Society of Civil Engineers, pp. 3626-3629.
4
4.Chun, B.S., Jung, D.K., Ryu, D.S., Son, J.R. (1996), “A study on the characteristics of silica-sol injection material for grouting”, Korean Society of Civil Engineers, Vol. 3, No. 3, pp. 539-542.
5
5.Hyun, I.H. (2010), “Standard for waterworks facilities established by ministry of environment”, Korea Water and Wastewater Works Association.
6
6.Jang, Y.S., Cho, S.H., Oh, J.H. (2015), “Research report of cause and prevention of ground subsidence in youngsan station”, Korean Geotechnical Society.
7
7.Kang, H.S. (2009), “Study on the predictive simulation and minimization of the impact of construction of highway tunnels on groundwater in gyeongsang basin”, PhD Thesis, Dept of Environmental Engineering, Kwangwoon University, Seoul, Korea.
8
8.Kim, H.K., Kim, Y.H., Chun, B.S. (2010), “Characteristics strength of silicasol-cement grout material for ground reinforcement”, Korean Geo- Environmental Society, Vol. 11, No. 9, pp. 47-53.
9
9.Kim, H.K., Lee, J.W., Lee, S.H., Kim, B.I. (2014), “A study on reinforcing quality by settlement recovery module in railroad roadbed”, Korean Society for Railway, Vol. 19, No. 184, pp. 1071- 1076.
10
10.Kim, J.M., Cho, S.D., Choi, B.H., Kim, H.B., Paik, Y.S. (2002), “A study of the load reduction effect on csp using geosynthetics”, Korean Geosyn-thetics Society, pp. 2576-2579.
11
11.Kim, J.M., Choi, B.H., Cho, S.D., Joo, T.S., Kim, H.B., Rhee, J.W. (2003), “A study of load reduction effect on conduits using compressible inclusion”, Korean Geosynthetics Society, Vol. 2, No. 2, pp. 3-11.
12
12.Kim, Y.S., Suh, D.E., Kim, W.B., Lee, W.B. (2009), “Engineering characteristics of the light weight soil using phosphogypsum and eps beads”, Korean Geo-Environmental Society, Vol. 10, No. 6, pp. 19-25.
13
13.Ku, J.S., Choi, Y.W., Lee, T.K. (2015), “Cavity findings on inquiry by GPR exploration”, Seoul Road Management Department.
14
14.Lee, H.D. (2007), “Material types and defect characteristics of waterwork/sewer pipeline networks”, Environment Focus, Vol. 19, pp. 30-40.
15
15.Lee, J.H., Hamm, S.Y., Cheong, J.Y., Jeong, J.H., Kim, N.H., Kim, K.S., Jeon, H.T. (2009), “Estimation of groundwater flow rate into Jikri tunnel using groundwater fluctuation data and modeling”, Journal of Soil and Groundwater Environment, Vol. 14, No. 5, pp. 29-40.
16
16.Lee, J.K., Lee, B.J., Oh, S.W. (2006a), “Bearing capacity characteristics of the light weight method used recycled eps beads”, Korean Geo-Environmental Society, Vol. 7, No. 5, pp. 21-29.
17
17.Lee, K.H., Song, C.S. (2006b), “Performance evaluation of underground pipe with in-situ recycled controlled low strength materials”, Korean Society of Road Engineers, Vol. 8, No. 2, pp. 1-12.
18
18.Lee, O.S., Kim, D.H. (2004), “Effect of ground subsidence on reliability of buried pipelines”, Korean Society of Precision Engineering, Vol. 21, No. 1, pp. 173-180.
19
19.Ministry of Land, Transport and Maritime Affairs (2012), Groundwater Management Plans.
20
20.Ministry of Land, Transport and Maritime Affairs (2013), Construction Standard Specification.
21
21.Moon, J.S., Lee, S.J. (2014), “Selection of concrete lining corrosion protection method for large sewer tunnels”, Korean Tunneling and Underground Space Association, Vol. 16, No. 4, pp. 347-360.
22
22.Park, I.J., Park, S.H. (2014), “Cause analysis and counterplan for sinkhole”, Magazine of Korean Society of Hazard Mitigation, Vol. 14, No. 5, pp. 12-17.
23
23.Park, J.H., Lee, K.H., Jo, J.Y., Song, C.S. (2004), “Deformation behavior underground pipe with clsm”, Korean Society of Road Engineers, Vol. 5, No. 2, pp. 123-130.
24
24.Ryu, Y.K. (2014), “Plan for reaction of settlement of ground by waterworks and drainage pipeline”, Water Journal, Vol. 124, pp. 68-72.
25
25.SBS news (2015), Yongsan Sinkhole Caused by Soil Leaking from Construction Site.
26
26.Seoul Seokchon-dong Cavity Cause Investigation Committee (2014), Cause Analysis of Cavity at Seokchon Underground Roadway and Road Cavity Special Management Measures.
27
27.Seoul Water Management Policy Dept. (2014), Investigation Result of Use and Occurrence Discharge of Groundwater.
28
28.Song, H.M., Hwang, H.K., Cho, J.I. (2006), “Pro-perties of concrete pipe by biochemical corrosion and performance deterioration in domestic”, Korea Concrete Institute, Vol. 18, No. 2, pp. 16-21.
29
29.Spangler, M.G. (1951), “Iowa engineering experiment station iowa state college ames”, IOWA. Report, pp. 8-20.
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 : 18
  • No :2
  • Pages :143-154
  • Received Date : 2016-01-25
  • Revised Date : 2016-02-10
  • Accepted Date : 2016-03-04
  • DOI :https://doi.org/10.9711/KTAJ.2016.18.2.143
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