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

• Beam-Spring Model;
• Differential Evolution Algorithm(DEA);
• Back Analysis;
• Operating Subsea Tunnel;
• Transversal Tunnel Section

• 빔-스프링 모델;
• 차분진화 알고리즘;
• 역해석;
• 운영 중 해저 터널;
• 횡단방향 터널;

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Acknowledgement

Grant : 도심지 소단면 (φ 3.5m급) 터널식 공동구 설계 및 시공 핵심기술 개발

Supported by : 국토교통과학기술진흥원

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