Route alignment and optimization of railway based on geological condition

Abstract

Characterized by high seismic intensity and high geological disaster risk, the geological condition of Longmenshan is complex and unique. How to carry out route alignment in such complicated geological background and avoid geohazards is one of key issues. Based on the geological background, including landform, lithology, Geological tectonic, geohazards distribution, acquired by remote sensing and field investigation, this paper firstly compared route schemes of the Chengdu-Lanzhou railway in Longmenshan mountain area, and regarded the Jushui river basin as recommendation for relatively less geohazards and no gobs. Then this paper secondly evaluated route schemes related to geohazards distribution and geohazards features in Jushui river basin, and regarded the D2K scheme as preferred option, which avoid large-scale and typical geohazards in the form of “early into tunnel and later out of tunnels” by longer tunnels.