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3D Numerical Simulation Analysis and Pre-estimation New Technology of Ground Collapse Caused by Subway Shield Construction

机译：地铁盾构施工引起的3D数值模拟分析与预估计新技术

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摘要

The prediction of ground collapse caused by subway shield construction has been an important technical problem in urban subway shield construction, if the ground collapse could be pre-estimated, it could be able to take appropriate precautionary measures in advance to avoid the occurrence of ground surface settlement before the project construction, but it's difficult to predict and calculate the settlement accurately. This paper analyzed main causes of ground collapse caused by shield construction, summarized the influence of several important parameters to surface settlement and then Midas GTS 3D numerical simulation software was used to simulate shield construction process and calculate ground surface settlement, to calculate stress, strain and displacement of overlying strata above the shield driving machine, obtained calculated values of surface settlement to predict ground collapse. Practice has proved that this pre-estimation new technology is in accordance with fact, it provides a useful reference for subway shield construction project.
机译：地铁盾构建设引起的地面崩溃预测已经是城市地铁盾构建设中的一个重要技术问题，如果可以预先估计地面崩溃，可以提前采取适当的预防措施以避免地面的发生在项目建设之前结算，但很难预测并准确地计算结算。本文分析了盾构建设引起的地面塌陷的主要原因，总结了几个重要参数对表面沉降的影响，然后使用Midas GTS 3D数值模拟软件来模拟屏蔽施工过程并计算地面沉降，计算应力，应变和屏蔽驱动机上方覆盖层的位移，得到了表面沉降的计算值，以预测地面塌陷。实践证明，这种预估计新技术符合事实，它为地铁盾构建设项目提供了有用的参考。

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