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Song, Zhanping
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Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering

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Improved Risk Assessment of TBM Tunneling Collapse Based on Nonlinear-Cloud Model Wang, Longjiang; Xu, Tian; Zong, Dachao; Han, Qiang; Zhao, Yongjin; Song, Zhanping; Zhang, Yongli
Journal of Engineering and Technological Sciences Vol. 56 No. 6 (2024)
Publisher : Directorate for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2024.56.6.9

Abstract

An innovative nonlinear enhancement technique that integrates the cloud model with Fuzzy Analytic Hierarchy Process (FAHP) is presented in this study. For the first time, this paper introduces TBM tunnelling parameters as evaluation indicators for tunnel construction collapse risk. Precise risk level thresholds are set for each indicator, establishing a comprehensive TBM construction collapse risk assessment system. Within this system, the cloud model is applied to accurately depict membership degrees, transcending the limitations of traditional reliance on functional formulas. Furthermore, the AHP is utilized to precisely calculate the weight vectors of the assessment indicators. Most significantly, this study introduces a nonlinear operator to achieve an efficient integration of the weight vectors with the fuzzy relation matrix. Based on the principle of maximum membership degree, the ultimate collapse risk level for TBM construction is determined. This method overcomes the shortcomings of traditional FAHP, which neglects the randomness in calculating membership degrees and the potential dilution of the influence of key risk factors when using linear operators in comprehensive risk assessment. The model was applied and validated in a hydraulic tunnel construction project, demonstrating its innovation and reliability, thus providing new theoretical foundations and technical support for the field of tunnel construction risk assessment.
Effect of Bolting on the Face of a Crushed Soft Rock Tunnel Chen, Lei; Cao, Yuxuan; Wen, Tongkai; Zhang, Haobin; Song, Zhanping
Journal of Engineering and Technological Sciences Vol. 58 No. 1 (2026): February 2026 (In Progress)
Publisher : Directorate for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2026.58.1.4

Abstract

To study the large deformation of surrounding rock during the passage of a soft rock tunnel through a fractured zone, a numerical simulation analysis was conducted on a specific tunnel section. The investigation focused on the extrusion deformation at the face, settlement deformation of the arch roof, and stress in the surrounding rock, considering the two support types used in the New Austrian Tunneling Method. The results show that the use of anchor bolts can reduce the pre-convergence deformation by 58.1% and its proportion by 23.5%, significantly increasing the minimum principal stress at the palm surface, maintaining the advanced core soil in the three-way stress state, and enhancing the longitudinal arch effect. These factors enhance the overall stability of the tunnel. Field monitoring data reveal that the convergence deformation of each part of the tunnel remains within a reasonable range, demonstrating the effectiveness of the face bolt in controlling deformation and adjusting the surrounding rock stress in the stratum, characterized by low quality and high degree of crushing.
Co-Authors Cao, Yuxuan Han, Qiang Lei Chen Wang, Longjiang Wen, Tongkai Xu, Tian Zhang, Haobin Zhang, Yongli Zhao, Yongjin Zong, Dachao