| Summary: | 碩士 === 國立臺北科技大學 === 土木與防災研究所 === 95 === According to the Taipei MRT planning, investigation and excavation experience in the past, the engineering geology characteristics of Taipei basin already provides geotechnical engineers lots of valuable information. There are just few geotechnical information in the SanChung - LuChow area across the Dan-Sui river if making comparison with the data within the Taipei city area. Following the planning and construction of MRT SinChung line and LuChow line, the geotechnical information within these areas are more abundant and complete. Up to now, most of the MRT stations already finish its excavation work gradually, its abundant construction and monitoring information can provide related geotechnical researchs.
This research was based on the theory of Finite Element Method and we employed the PLAXIS software to analyze the sensitivity about the represented sandy layer and clayey layer. Meanwhile, some practical excavation cases around SanChung - LuChow area were collected and were carried out the back analysis. The research results show that the evaluation of the elastic modulus of soil (Es) is about 3,000N~3,750N in sandy layer and 600Su~750Su in clayey layer around SanChung - LuChow area. It can provide an .appropriate range of Es parameter which can be used to the deep excavation analyses for a reasonable prediction about the maximum deformation during the excavation stages.
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