厦门市北溪引水主干渠改造工程基坑及围护设计

摘要:

以北溪引水主干渠改造工程为背景,基于不同工程段提出不同基坑支护方案进行比选,得到基坑分段设计方案：具备放坡开挖界面时采用放坡开挖方式进行施工；不具备开挖界面时采用板式支护体系＋内支撑的方式进行施工；过河段采用钻孔灌注桩+三轴搅拌桩止水进行基坑支护,同时兼有未来保护倒虹吸功能。其实践应用对于类似基坑工程设计有重要参考意义。

Abstract:

Based on the renovation project example of xi diversion main canal, different pit support schemes are proposed for comparison and selection based on different engineering sections, and the pit sectional design scheme is obtained: slope excavation is adopted when there is slope excavation interface; When there is no excavation interface, slab support system and internal support are used for construction. In the river section, bored pile and three-axis mixing pile are used to support the foundation pit, and at the same time have the function of future protection of inverted siphon. Its practical application has important reference significance for similar foundation pit engineering design.