离心机
发掘
刚度
非线性系统
岩土工程
参数统计
隧道施工
工程类
无量纲量
风洞
水洞
结构工程
接口(物质)
物理
机械
数学
量子力学
肺表面活性物质
统计
吉布斯等温线
化学工程
涡流
核物理学
航空航天工程
作者
Dalong Jin,Dajun Yuan,Yannick Choy Hing Ng,Yutao Pan
标识
DOI:10.1016/j.tust.2022.104571
摘要
In heavily urbanised areas, the construction of tunnels underneath existing ones is unavoidable and much caution has to be exercised in both design and construction so as not to undermine the safety of the structure and vehicles. In this paper, a non-linear soil-tunnel interaction model is developed to evaluate the tunnel behaviour that is induced by a new undercrossing tunnel excavation. A barrel interface is proposed between the existing tunnel and surrounding soil, and effects of soil-tunnel interaction are considered by implementing limiting forces; depending on the stress conditions at the tunnel-soil interface, either separation or elastoplastic yielding can thus be modelled. Through validation with the centrifuge test results and instrumentation data from a field case study, it is shown that the proposed model can provide an accurate evaluation of tunnel behaviour. A parametric study also highlights the importance of considering tunnel-soil interaction when analysing the influence of volume loss and structural stiffness on the response of the existing tunnel. Finally, dimensionless design charts are provided as a preliminary evaluation tool in tunnel design.
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