明挖法过河隧道的深基坑支护方案选型与分析

Selection and Analysis on Deep Foundation Pit Supporting Scheme of Excavated River-crossing Tunnel

城市内市政道路隧道工程大多采用明挖法的设计与实施方案。以西安一下穿灞河隧道基坑支护设计方案为例进行全面比选,对穿河明挖隧道分期实施方案、深厚淤泥层深基坑支护设计、施工工法的选择进行详细介绍。最后结合后期实施效果总结经验,为后期类似项目提供参考。

Most of the municipal road tunnel projects in cities adopt the design and implementation scheme of excavation method.Taking the foundation pit supporting design scheme of a tunnel crossing Bahe River as an example,the comprehensive comparison and selection are carried out.The implementation scheme of excavated river-crossing tunnel by stages,the supporting design of deep foundation pit in deep silt layer and the selection of construction method are introduced in detail.Finally,combined with the implementation effect in the later period,the experience is summarized to provide the reference for the similar projects in the later period.