1985 — 2025土木工程系40周年系庆学术报告之二
题目：Impact of Stratified Soil Layers on NATM Tunnel Excavation:Insights from Trapdoor Tests
报告人：崔 瑛（横滨国立大学副教授）
时间： 2025年9月19日下午5:00-6:30
地点：土木楼（东区11号）312会议室
讲座摘要：In recent years, tunnel collapses in multi-layered ground have highlighted the need to better understand geological influences on excavation stability. This study investigates the mechanical behaviour of bi-layered soils during NATM tunnelling, using physical trapdoor tests and DEM simulations. Results show that in two-layer systems, the relative layer thickness controls shear band development, with the thicker layer dictating its geometry. When a strong upper layer overlies a weaker one of similar thickness, stress redistributes to the strong layer, forming a stable stress arch—a key mechanism for tunnel stability. These findings contribute to safer tunnel design in stratified ground conditions.
个人简介：Dr. Ying Cui is an Associate Professor in the Faculty of Urban Innovation at Yokohama National University, specializing in geotechnical and tunnel engineering. She holds a PhD from Kyoto University and has extensive research experience in tunnel stability, soil mechanics, and advanced numerical simulations. Dr. Cui has led multiple grants and industry collaborations, focusing on areas such as unsaturated soil behavior, laser scanning for tunnel inspection, and seismic performance of underground structures. She has published widely in top-tier journals and contributes actively to both fundamental and applied aspects of geotechnical engineering.
