Whereas the new wind-blown sand tunnel has adopted small duct leading pre-bracing and overcome problem with excavation.
通过新风积砂隧道采用小导管超前预支护技术成功克服了短隧道的开挖问题。
The difficult excavation is a difficult point in construction of wind-blown sand tunnel, thus, to ensure smooth going of excavation is a stress of excavation work.
风积砂隧道的施工难点是开挖难,如何保证开挖工作的顺利进行就成为开挖工作的重点。
应用推荐