Prediction of Diaphragm Wall Caused by Deep Excavation in Clays

• Main Authors: Mei-Jhen Chen, 陳玫臻
• Other Authors: Chang-Yu Ou
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/03758185479160815181

碩士 === 國立臺灣科技大學 === 營建工程系 === 103 === The purpose of this study is to establish a simplified methods for prediction of the maximum wall deflections caused by a excavation in clay. Initially, the soil model and parameters of soil and structural elements were calibrated with a well-documented deep excavation case, namely TNEC excavation, by using PLAXIS 2D. Then, 384 sets of hypothetical case, with variation of influence factors such as excavation depth, excavation width, normalization undrained shear strength, the system stiffness of the wall, and the axial stiffness of the lateral strut per unit length of the wall, were simulated in order to establish the relationship between the maximum wall lateral deflection and those factors. The multivariate regression analysis with exponential model was selected as a proper model for processing those data. Owing to some data were illogical from practical point of view, only data from 358 sets of hypothetical case were considered as valid data. The SPSS software was used as a tool for data processing. Finally, a simplified method was developed. The result was compared and discussed with the previous proposed methods.