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Three-Dimensional Finite Element Analyses For Optimal Ground Improvement For Tunnel Cross Passage In Bangkok Subsoils, Mengly Seng
Three-Dimensional Finite Element Analyses For Optimal Ground Improvement For Tunnel Cross Passage In Bangkok Subsoils, Mengly Seng
Chulalongkorn University Theses and Dissertations (Chula ETD)
Jet grouting is a common technic for improving the stability during the construction of tunnel cross-passages in soft grounds. In this study, the optimal soil-cement mass for a cross-passage from a tunnel to an intervention shaft in Bangkok subsoils was determined using three-dimensional finite element analyses. The soil-cement mass was assumed to be octagonal prism along the route of the cross-passage which has the radius of 2.25m. The result showed that the factor of safety increases linearly with the improvement radius. The improvement radius of 3.60m was selected since it is satisfied with the FS more than 1.4 and the …