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The development of a back analysis program for subsea tunnel stability under operation: transversal tunnel section

운영 중 해저 터널의 안정성 평가를 위한 역해석 프로그램 개발: 횡단방향

Joon-Sang An1
,
Byung-Chan Kim2
,
Sang-Hyun Lee3
,
Ki-Il Song4*
안 준상1
,
김 병찬2
,
이 상현3
,
송 기일4*
1INHA University, Graduate student, Dept. of Civil Engineering
2BasisSoft, Inc, Chief Engineer, Construction IT Laboratory
3INHA University, Postmaster Researcher, Dept. of Civil Engineering
4INHA University, Associate Professor, Dept. of Civil Engineering
1인하대학교 토목공학과 박사과정
2㈜베이시스소프트 건설IT연구소 연구소장
3인하대학교 토목공학과 박사과정
4인하대학교 토목공학과 부교수
*교신저자. *Corresponding Author. 
31 March 2017. pp. 195-212
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Abstract

When back analysis is used for the assessment of an operating subsea tunnel safety in various measurement information such as stress, water pressure and tunnel lining and ground stiffness degradation, the reliable results within tolerable error rate can be obtained. By utilizing a commercial geotechnical analysis program FLAC3D, back analysis can be performed with a DEA which has already been successfully validated in previous studies. However, relative more time-consumption is the drawback of this approach. For this reason, this study introduced beam-spring model-based on FEM solver which uses less analysis time relatively. Beam-spring program capable of structural analysis of a circular tunnel section was developed by using Python language and combined with the built-DEA. From the measurement datum, expected to estimate the stability of an operation tunnel close to real-time.

Keywords
빔-스프링 모델
차분진화 알고리즘(DEA)
역해석
운영 중 해저 터널
횡단방향 터널

운영 중 해저 터널의 안정성 평가에 응력, 수압 그리고 라이닝 및 주변지반의 강성 열화 등과 같은 다양한 계측 정보를 사용해서 역해석하면, 효율적인 오차율 이내의 결과를 획득할 수 있다. 선행 연구에서 검증된 차분진화 알고리즘 기반의 역해석 수행 시 FLAC3D 등 범용 지반해석 프로그램을 사용했지만, 상대적으로 해석시간이 오래 걸리고, 제어가 어려운 단점이 있다. 이러한 이유로, 본 연구에서는 상대적으로 해석시간이 짧게 소요되는 beam-spring 모델 기반의 FEM solver를 도입하였다. 원형 터널 단면의 구조해석이 가능한 beam-spring 프로그램을 Python 언어로 개발하여, 기구축된 차분진화 알고리즘과 결합하였다. 계측 데이터로부터 실시간에 가깝게 운영 중 터널의 안정성 평가가 가능할 것으로 판단된다.

키워드
Beam-Spring Model
Differential Evolution Algorithm(DEA)
Back Analysis
Operating Subsea Tunnel
Transversal Tunnel Section
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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 :195-212
  • Received Date : 2017-03-07
  • Revised Date : 2017-03-15
  • Accepted Date : 2017-03-17
  • DOI :https://doi.org/10.9711/KTAJ.2017.19.2.195
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