关键词: 连拱隧道, 二衬开裂, 三维地质模型

Abstract:

First of all，the 3D geological model of some Tunnel was built due to the situation of the tunnel lining cracking. Secondly, the cracking causes were investigated and analyzed based on the geological model from aspects of geography, geological conditions and underground water. Thirdly，the mechanism being interaction between tunneling and slop slipping was proposed and was predominantly assumed as the factor leading to lining cracking. Finally, the construction recommendations were made, involving strengthening tunnel support and slope uploading.

Key words: double-arch tunnel, lining cracking, 3D geological model