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针对现阶段新(扩)建铁路客运专线临近既有线或高速公路深基坑施工防护需要,结合新建铁路兰州至中川机场线黄羊头碱沟特大桥4#、5#墩深基坑施工过程中采用的钻孔排桩支护设计与施工技术的总结,重点介绍了临近既有线或高速公路的深基坑支护方案的选择、钻孔排桩支护设计和具体施工流程与要求。该技术对类似临近既有线或高速公路深基坑施工具有较好的指导意义。
In the light of the need of protective construction of deep foundation pit for existing (or expanded) passenger dedicated railway line near existing line or expressway at the present stage, in combination with the construction of 4 # and 5 # deep foundation pit of Huangyan-Toujigou Bridge in Lanzhou to Zhongchuan Airport of New Railway, In the design and construction of drilling row pile support technology summary, focusing on near the existing lines or freeway deep foundation pit support options, the design of drilling row of piles support and the specific construction process and requirements. This technique has a good guiding significance for the construction of deep foundation pit near similar existing lines or expressways.