Evaluation of Ground Movements in EPB-Shield Tunnelling for Bangkok MRT by 3D-Numerical Analysis

摘要

This paper presents results of 3D numerical analysis using FLAC3D to evaluate characteristics ofrnground movements associated with MRT subway tunnelling using EPB shields in Bangkok subsoils.rnEffects of influencing factors i.e. face pressure, soil layering, piezometric drawndown of groundwater,rntail void grouting, and input values of initial horizontal ground stress were investigated. A comparisonrnwas made between the prediction by the analysis and monitoring data.