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<p>Deep excavations in Asian megacities present significant geotechnical challenges owing to complex soil–structure interactions and the constraints of dense urban environments. This study investigates seven representative projects in Asian urban cities including Bangkok, Phnom Penh, Ho Chi Minh City, Kuala Lumpur, Jakarta, and Taipei, encompassing both top-down and bottom-up construction methods. Finite element analyses using the Hardening Soil Model were validated against field monitoring data, indicating maximum lateral wall displacements varying in the ranges of 21.9–95.3&#xa0;mm in clay-dominated sites and 31.7–90.9&#xa0;mm in sand-dominated sites, with corresponding ground settlements of 19.7–87.7&#xa0;mm. To enhance predictive reliability, empirical models were recalibrated through systematic parametric studies and optimization. The refined models demonstrated significantly improved accuracy in estimating wall deflections and surface settlements across varied soil profiles and construction methods, offering a practical and performance-oriented framework for design. These findings advance empirical prediction methods by incorporating site-specific variability and construction effects, offering practical and general guidelines for deep excavations in soft to medium clays and sandy subsoils across urban Asia.</p>

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Predictive models for wall movements and surface settlements in deep excavations using site data from Asian megacities

  • 期刊论文

  • 发表日期：

    2025年11月25日

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  • Hla Khine,
  • Raksiri Sukkarak,
  • Suched Likitlersuang

摘要

Deep excavations in Asian megacities present significant geotechnical challenges owing to complex soil–structure interactions and the constraints of dense urban environments. This study investigates seven representative projects in Asian urban cities including Bangkok, Phnom Penh, Ho Chi Minh City, Kuala Lumpur, Jakarta, and Taipei, encompassing both top-down and bottom-up construction methods. Finite element analyses using the Hardening Soil Model were validated against field monitoring data, indicating maximum lateral wall displacements varying in the ranges of 21.9–95.3 mm in clay-dominated sites and 31.7–90.9 mm in sand-dominated sites, with corresponding ground settlements of 19.7–87.7 mm. To enhance predictive reliability, empirical models were recalibrated through systematic parametric studies and optimization. The refined models demonstrated significantly improved accuracy in estimating wall deflections and surface settlements across varied soil profiles and construction methods, offering a practical and performance-oriented framework for design. These findings advance empirical prediction methods by incorporating site-specific variability and construction effects, offering practical and general guidelines for deep excavations in soft to medium clays and sandy subsoils across urban Asia.