Effect of constructing twin tunnels under a building supported by pile foundations in the Sydney central business district

作     者：Hadi Khabbaz Robert Gibson Behzad Fatahi 

作者机构：School of Civil and Environmental EngineeringUniversity of Technology Sydney(UTS)Australia 

出 版 物：《Underground Space》 (地下空间（英文）)

年 卷 期：2019年第4卷第4期

页      面：261-276页

核心收录：

学科分类：081406[工学-桥梁与隧道工程] 08[工学] 0818[工学-地质资源与地质工程] 0815[工学-水利工程] 0813[工学-建筑学] 0814[工学-土木工程] 082301[工学-道路与铁道工程] 0823[工学-交通运输工程] 

基　　金：Corresponding author at:Hadi Khabbaz School of Civil and Environmental Engineering Faculty of Engineering and Information Technology University of Technology Sydney(UTS) City Campus PO Box 123 Broadway NSW 2007 Australia.E-mail addresses:Hadi.Khabbaz@uts.edu.au 

主　　题：Twin tunnels Finite element modeling Pile foundations Plaxis Sydney central business district 

摘      要：In congested cities such as Sydney,competition for underground space escalates within the built environment because various assets require finite geotechnical strength and *** problems such as damage to buildings may develop when high-rise buildings on piled foundations are subject to ground movements as tunnels are *** paper focuses on the risks of tunneling beneath Sydney’s Martin Place and how buildings are subject to additional loads caused by *** key objective of this study is to improve the understanding of tunnel-rock-pile interactions and to encourage sustainable development.A finite element model is developed to predict the interaction between tunnel construction and piled *** tunnel,rock,and pile components are studied separately and are then combined into a single *** ground model is based on the characteristics of Hawkesbury Sandstone and is developed through a desktop *** piles are designed using Australian Standards and observations of high-rise *** tunnel construction is modeled based on the construction sequence of a tunnel boring *** combining the components,a parametric study on the relationship between tunnel location,basements,and piles is *** findings,thus far,show that tunneling can increase the axial and flexural loads of piles,where the additional loading exceeds the structural capacity of some piles,especially those that are close to basement *** parametric study reveals a strong relationship between tunnel depth and lining stresses,while the relationship between tunnel depth and induced pile loads is less ***,the horizontal tunnel position relative to piles shows a stronger relationship with pile *** research into tunnel-rock-pile interactions is recommended,especially beneath basements,to substantiate the results of this study.