介绍为提高小洞室开挖质量而优选的一种开挖施工方法。
An excavation implementation method to improve the quality of excavation in pilot chamber is also introduced.
主厂房系统爆破开挖程序和开挖方法，最直接地影响着整个工程工期、质量、安全及成本。
The excavation sequence and excavation method of the main carven system affect directly the completion date, quality, safety and cost of the project.
地层和地下管网条件复杂是影响非开挖导向钻进质量的重要因素。
Complicated formation condition and underground pipe network condition are the important factors that influence the quality of guided drilling of trenchless technology.
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