The construction technique of overlapped single tunnels is the first in China to adopt in Shenzhen subwayengineering.
单洞重叠隧道施工技术是深圳地铁在国内第一次采用。
2
Researching the effect of piles near subway project by excavation for shallow tunnels has become an important issue needed to be resolved in subwayengineering construction.
因此研究地铁浅埋暗挖法施工对邻近桥桩的影响，成为地铁工程建设中急需解决的重要问题。
3
Subwayengineering is often influenced by the underground water, therefore, the issue of waterproof decides the durability and sturdy of metro tunnel and the regular operation.