Taking the cross cave propping in Hanguguan Tunnel of passengers special line on Zhengxi railway, this paper introduces a new construction technique of propping - vertical propping method.
文章以郑西铁路客运专线函谷关隧道横洞挑顶为例，介绍了一种新型挑顶施工工艺——垂直挑顶法。
2
The paper introduces the treating construction technique of Micangkou tunnel underground buried river and cave at Three Gorges Dam alongside highway.
本文介绍了三峡库区沿江公路米仓口隧道地下暗河及溶洞的处理施工技术。
3
The geological disaster, such as cave of karst, rushing water and collapse often occur in tunnel excavation.