http://hdl.handle.net/1721.1/7801 Wed, 22 May 2013 00:35:17 GMT 2013-05-22T00:35:17Z http://hdl.handle.net/1721.1/73774 Evaluation of rainfall-induced landslide transit characterization Chen, Yi-Ting, Civ. E. Massachusetts Institute of Technology As landslide hazard has intensified in the past decades, the development of landslide hazard evaluation systems has become more and more important. However, not much attention is paid to discussing the landslide transition in new and reoccurring landslides between different triggering events. A region in the central Taiwan, the Chenyulan River basin with the landslides from three typhoon events, Typhoons Toraji, Mindulle and Sinlaku, is selected for landslide hazard analysis in this study. The Rainfall-induced Landslide Hazard Rating System is developed and applied in the landslide transit characterization analyses. The results show that landslide transit characterization varies according to geological and topographic factors in the study area. More importantly, locations with preceding landslides, regardless of occurrence time, are vulnerable to landslide reoccurrence. A systematic procedure of landslide transit characterization is developed in this study, which ultimately can provide additional information for future planning and design of landslide alarm system. Thesis (Civ. E.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2012.; Cataloged from PDF version of thesis.; Includes bibliographical references (p. 108-112). Sun, 01 Jan 2012 00:00:00 GMT http://hdl.handle.net/1721.1/73774 2012-01-01T00:00:00Z http://hdl.handle.net/1721.1/72713 Prediction of in situ consolidation parameters of Boston Blue Clay Ghantous, Imad Botros Thesis (Civ.E)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1982; MICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING.; Bibliography: leaves 585-594. Fri, 01 Jan 1982 00:00:00 GMT http://hdl.handle.net/1721.1/72713 1982-01-01T00:00:00Z http://hdl.handle.net/1721.1/60759 Re-analysis of deep excavation collapse using a generalized effective stress soil model Corral Jofré, Gonzalo Andrés This thesis re-analyzes the well-documented failure of a 30m deep braced excavation underconsolidated marine clay. Prior analyses of the collapse of the Nicoll Highway have relied on simplified soil models with undrained strength parameters based on empirical correlations and piezocone penetration data. In contrast, the current research simulates the engineering properties of the key Upper and Lower Marine Clay units using a generalized effective stress soil model, MIT-E3, with input parameters calibrated using laboratory test data obtained as part of the post-failure site investigation. The model predictions are evaluated through comparisons with monitoring data and through comparisons with results of prior analyses using the Mohr-Coulomb (MC) model. The MIT-E3 analyses provide a modest improvement in predictions of the measured wall deflections compared to prior MC calculations and give a consistent explanation of the bending failure in the south diaphragm wall and the overloading of the strut-waler connection at the 9th level of strutting. The current analyses do not resolve uncertainties associated with performance of the JGP rafts, movements at the toe of the north-side diaphragm wall or discrepancies with the measured strut loads at level 9. However, they represent a significant advance in predicting excavation performance based directly on results of laboratory tests compared to prior analyses that used generic (i.e., non site-specific) design isotropic strength profiles. Thesis (Civ. E.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2010.; Cataloged from PDF version of thesis.; Includes bibliographical references (p. 137-138). Fri, 01 Jan 2010 00:00:00 GMT http://hdl.handle.net/1721.1/60759 2010-01-01T00:00:00Z http://hdl.handle.net/1721.1/59613 Real-time modeling of river basin response using radar-generated rainfall maps and a distributed hydrologic database Garrote, Luis Thesis (Civ. E)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1992.; Includes bibliographical references (p. 315-324). Wed, 01 Jan 1992 00:00:00 GMT http://hdl.handle.net/1721.1/59613 1992-01-01T00:00:00Z