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大跨度软岩公路隧道采用短台阶七步平行流水作业法施工在我国尚属探索阶段。结合工程实践 ,详细地介绍了该施工方法的技术特点、适用范围、工艺原理、施工工艺、机具设备、劳力组织、质量控制、施工安全以及效益分析等 ,对类似隧道施工有一定的参考价值。
Long-span soft rock highway tunnel using a short step seven parallel flow method construction is still in our exploration stage. Combined with the engineering practice, the technical characteristics, applicable scope, process principle, construction technology, machine equipment, labor organization, quality control, construction safety and benefit analysis of the construction method are introduced in detail. It has certain reference value for similar tunnel construction.