open excavation

基本解释

Said invention is specially suitable for laying underground pipeline to pass through the section of an area unable for open-excavation.
本发明特别适合于铺设地下管线穿越不可开挖地段的工程使用。
ip.com
So construction technique of open excavation of pit in sand layer and piers for double-track railway with steel mould without tie rod is the key item of quality control.
在工程开工前，施工单位对桥梁施工技术难点作了分析研究，将潍河特大桥水中墩基础和墩身作为重点工程，并将水下砂层的基坑开挖及双线墩施工技术作为技术攻关的重点项目。
The problem of shield machine driving through a station in Metro construction can be well solved by combining shield-driven tunnelling with mining or open cut excavation.
盾构扩挖法建造地铁车站能够很好地解决地铁建设中盾构过站的问题。