Trend Analysis of Segments and Tunnel Boring Machines for Railway Shield Tunnels

Abstract

Trends in railway tunnels constructed with the shield method were analyzed based on a database which contains 388 construction cases spanning the period 1964 to 2013. This research investigated the thickness and width of segments, number of divided segments and intervals between ring joints. Trends in parts related to shield machines were also described such as types of TBM, tail clearances between shield skin plates and segments, thickness of shield skin plates and backfill grouting.