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以超长大管棚在地下人行通道超浅埋暗挖法施工中的应用为例,分析了长管棚在复杂环境条件下对施工精度控制要求非常严格时工艺的选择。通过实例介绍了管棚采用非开挖水平导向钻进法的施工原理、施工工艺、施工质量控制及纠偏方法,验证了其实施效果。最后,总结出超长管棚采用非开挖水平导向钻进法施工时控制要点及应用前景。
Taking the application of ultra-long pipe shed in ultra shallow excavation method of underground pedestrian passage as an example, the process selection of long pipe shed under very complicated environmental conditions is analyzed. The construction principle, construction technology, construction quality control and deviation correction method of trenching by using trenching horizontal guide drilling method are introduced through examples. The effect of its implementation is verified. Finally, it summarizes the control points and application prospects of the extra-long pipe roof when using the trenchless horizontal pilot drilling method.