According to the practical situation, the large excavation method was used to shift the break-off pipe crossing segment to the altered design altitude, than the buried trench laying method was applied to accomplish remained pipeline crossing.

• 文章针对这一穿越工程事故,详细介绍了补救施工方法及其关键技术。 根据工程的实际情况,采取大开挖方式将断点处管段返到变更后的设计高程,再采用沟埋敷设法完成剩余管道的穿越。