All Issue

2021 Vol.31, Issue 3 Preview Page

Research Article

Numerical Analysis Study for Behavioral Characteristics Analysis of Jeju Natural Caves (Jaeamcheon Lava Tube) That Intersect with Roads

도로와 교차하는 제주천연동굴(재암천굴)의 거동특성 분석을 위한 수치해석적 연구

Jong-Hyun Lee1
,
Hyun-Sik Jin2
,
Joon-Sang An3
,
Yong Baek4*
이 종현1
,
진 현식2
,
안 준상3
,
백 용4*
1Research Fellow, Department of Geotechnical Engineering Research, Korea Institute of Civil Engineering and Building Technology
2CEO, Geotechnical Division, HNG Consultants Co., Ltd.
3CEO, Construction IT Laboratory, BasisSoft, Inc.
4Senior Research Fellow, Department of Geotechnical Engineering Research, Korea Institute of Civil Engineering and Building Technology
1한국건설기술연구원 지반연구본부 연구위원
2(주)HNG컨설턴트 지반사업부 대표
3(주)베이시스소프트 건설IT연구소 대표
4한국건설기술연구원 지반연구본부 선임연구위원
*Corresponding Author
30 September 2021. pp. 367-380
PDF XML Citation
Abstract

This study evaluated the stability through a three-dimensional numerical analysis method when a natural cave exists under a road in operation in Jeju Island. In order to confirm the geometric and geotechnical characteristics of the Jeju natural cave passing under the road, existing geotechnical survey reports were collected, and were studied the characteristics. In order to evaluate the effect of vehicle vibration loading on the natural cave in Jeju, three-dimensional numerical analysis was performed considering discontinuities. Through this, the stability of roads and caves with respect to vehicle speed and the depth of cover (distance from the road to the top of the natural cave) was evaluated and countermeasures were suggested. In order to secure the long-term stability of the Jeju natural cave that penetrates the lower part of the road, it was evaluated that systematic management such as long-term measurement management, reinforcement measures, and emergency measures would be necessary depending on the depth of the cover.

Keywords
natural cave
long-term stability
vehicle vibration loading
numerical analysis

본 연구는 제주도 내 운영중인 도로하부에 천연동굴이 존재하는 경우, 3차원 수치해석적 방법을 통해 안정성을 평가하였다. 도로 하부를 관통하는 제주천연동굴의 기하학적 및 지반공학적 특성을 확인하기 위해 기존 지반조사보고서를 수집한 후, 그 특성을 검토하였다. 이를 토대로 차량진동하중이 제주천연동굴에 미치는 영향을 평가하기 위하여 불연속면을 고려한 3차원 수치해석을 실시하였다. 연구결과를 토대로, 차량속도, 토피고에 따른 도로와 제주천연동굴의 안정성을 평가하고, 대책을 제안하였다. 도로 하부를 관통하는 제주천연동굴의 장기안정성 확보를 위하여, 토피고에 따라 장기계측관리, 보강대책, 응급대책 등 체계적인 관리가 필요할 것으로 평가되었다.

키워드
천연동굴
장기안정성
차량진동하중
수치해석
References
1
Bentley Systems International Ltd., 2021, PLAXIS 3D CONNECT Edition V21.01, User Manuals, Delft, Netherlands.
2
JCRC (Jejudo Cave Research Center), 2019, Jeju island natural cave exploration, investigation and research report (in Korean).
3
Jeju-city, 2015, Report on the detailed inspection of Jaeamcheon-gul cave and establishment of maintenance and reinforcement measures, Jeju Special Self-Governing Province, Jeju-city (in Korean).
4
KCSC (Korean Construction Standards Center), 2018, KDS Code - 17 10 00 : Seismic design general (in Korean).
5
Kim, B.H., 2007, Preserving and managing lava tubes in Jeju island, Master’s Thesis, Department of Education, Graduate School, Cheju National University, 94-96 (in Korean with English abstract).
6
Lambert, D.W., Adams, G.L., Fodor, B., 2012, Use of electrical resistivity surveying to evaluate collapse potential related to road construction over a cave, In Symposium on the Application of Geophysics to Engineering and Environmental Problems, Society of Exploration Geophysicists, 415-422. 10.4133/1.4721839
7
Lee, J.H., Jin, H.S., Baek, Y., 2020a, The development of road management technique against ground subsidence at the intersection of road and lava tube in Jeju, The Korean Society of Engineering Geology, Fall Conference, 59p (in Korean).
8
Lee, J.H., Jung, H.Y., Baek, Y., 2020b, A study on vibration characteristics by vehicle at the intersection of road and lava tube in Jeju, The Korean Society of Engineering Geology, Fall Conference, 60p (in Korean).
9
Lee, K.C., Song, J.Y., Ahn, U.S., Park, Y.C., Cho, K.N., 2021, A study on the vehicles and construction equipments vibration characteristics of Geomunoreum lava tube system, Jeju island, Journal of the geological society of Korea, 57(2), 209-225 (in Korean with English abstract). 10.14770/jgsk.2021.57.2.209
10
MCT (Ministry of Construction & Transportation), 1997, Seismic design standards II (in Korean).
11
Ministry of Environment, 2002, A study on the evaluation of building damage due to vibration (in Korean).
12
SAJWTH (Special Autonomy for Jeju the World Treasure Headquarters), 2020, Jeju island natural cave conservation management plan research and investigation report (in Korean).
Information
  • Publisher :Korean Society of Engineering Geology
  • Publisher(Ko) :대한지질공학회
  • Journal Title :The Journal of Engineering Geology
  • Journal Title(Ko) :지질공학
  • Volume : 31
  • No :3
  • Pages :367-380
  • Received Date : 2021-08-25
  • Revised Date : 2021-09-15
  • Accepted Date : 2021-09-17
  • DOI :https://doi.org/10.9720/kseg.2021.3.367
Journal Informaiton The Journal of Engineering Geology The Journal of Engineering Geology
Online Submission
  • NRF
  • KOFST
  • KISTI Current Status
  • KISTI Cited-by
  • crosscheck
  • orcid
  • open access
  • ccl
Journal Informaiton Journal Informaiton - close