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Removal of the utility tunnel by shield method to build the underground expressway

机译：盾构法拆除公用隧道建设地下高速公路

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摘要

The Central Circular Shinjyuku Route of the Metropolitan Expressway is planned under the arterial road (Ring Road No. 6) in downtown Tokyo. The tunnel is planned to be constructed by the shield method, however the abandoned utility tunnel exists in the same alignment for about 1-km. Since "the area is heavily congested and surrounded by the important structures, a conventional cut-and-cover method cannot be adopted to remove the existing tunnel. Thus, donut-shaped backfill shield is developed to remove the existing tunnel without causing adverse effects on the surface. Design of the back fill shield and the sequence of the existing tunnel removal procedure are introduced in this report.
机译：计划在东京市区的干线公路（6号环路）下，进行大都会高速公路的新宿中央环线。隧道计划采用屏蔽法施工，但是废弃的公用事业隧道以相同的路线存在约1公里。由于“该区域被严重拥挤并被重要结构包围，因此无法采用传统的挖坑覆盖方法来拆除现有隧道。因此，开发了环形的回填护罩来拆除现有隧道而不会对隧道造成不利影响本报告介绍了回填护盾的设计以及现有隧道拆除程序的顺序。

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