Use of a two-dimensional discrete-element line-sink model to gain insight into tunnelling-induced deformations

Author:

BYM T.,MARKETOS G.,BURLAND J.B.,O'SULLIVAN C.

Abstract

A two-dimensional discrete-element model (DEM) is shown to provide useful information regarding the kinematics of ground deformation in response to tunnelling. Tunnel excavation and construction is a highly complex process and the line-sink model approach used in previous analytical studies provides a simple means to simulate the excavation process. A virtual sand box was created using DEM and grains were progressively deleted to simulate the sink. The surface settlement trough was determined and, when normalised by the maximum settlement, its shape was nearly constant and closely fitted a Gaussian curve. The deformations observed gave a good approximation to the displacement field predicted using the Verruijt and Booker analytical line-sink model. This preliminary study suggests that a simple line-sink DEM may provide a robust basic frame of reference for the complex mechanisms of ground movement around soft ground tunnels. More generally the results demonstrate the potential of using particulate DEM to study ground response to tunnelling.

Publisher

Thomas Telford Ltd.

Subject

Earth and Planetary Sciences (miscellaneous),Geotechnical Engineering and Engineering Geology

Reference24 articles.

1. Bym T. DEM simulation of the settlement trough induced by tunnelling. MSc thesis, 2011, Department of Civil and Environmental Engineering, Imperial College, London, UK.

2. A discontinuous future for numerical modelling in geomechanics?

3. A discrete numerical model for granular assemblies

4. Soil Tunnel Test Section: Case History Summary

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3