Analysis of Weak Rock Profile Deformation for Earth Pressure Balance (EPB) Shield Tunneling

• Main Authors: Po-Chia Chiu, 邱柏嘉
• Other Authors: 陳水龍
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/e2ewzc

碩士 === 國立臺北科技大學 === 土木工程系土木與防災碩士班 === 106 === Although there are lots of domestic and foreign scholars have conducted theoretical researches on the deformation behavior in terms of the excavation of shield tunnel, the deformation of the bedrock caused by the excavation of the shield tunnel structure has many influencing factors. However, the complex bedrocks with non-continuous deformation properties which are calculated based on the empirical formulas of engineering theory and the experience with statistical type can lead to the errors of the model adaptability and calculation application when the situation is complicated and the factors that cannot be taken into account. The software of Plaxis3D relied on the application of Finite Element Methods which has been developed fully can be applied to calculate the complex deformation problems taking place in the simulation of nonlinear models and to analyze the stress and strain trends. This study discusses the case of “The project of MRT system extending from Taoyuan International Airport to CM01 sector of Zhongli train station”, and compares the longitudinal and lateral deformation curves with on-site monitoring instruments by simulating the deformation of ground subsidence caused by shield tunnel. Also, analyzing the HOEK-BROWN pattern by using the rock mass can obtain more accurate results in comparison of that calculated with traditional Mohr-coulomb criterion. However, the influences of shield tail grouting, jack thrust, pate pressure and others shall be taken into account when simulating shield machine to excavate, which makes the vertical subsidence curve be stable. Such research will be suitable for the simulation pattern of tunnel excavation in bedrock and can be viewed as a reference for similar case simulation subsequently.