上软下硬地层中明挖基坑“吊脚桩”支护型式应用研究

An Applied Research on Supporting “End-suspended Piles” in Open Excavations of Foundation Pits at the Upper-soft Lower-hard Stratum

结合青岛地铁2号线燕儿岛路站,针对"上软下硬"土岩地层,对"吊脚桩"这一特殊支护型式在基坑开挖施工中使用条件、计算方法、设计要点等进行探讨。工程实践表明该支护型式在此特殊地层中应用是成功的,可为类似工程提供参考。

Based on the Yan＇erdao Road Station of Qingdao Metro Line 2, this paper explores utilization conditions, calculation methods and design essentials of the special supporting type of ＂end-suspended piles＂ in excavations and constructions of foundation pits at the ＂upper-soft lower-hard stratum＂. Engineering practices demonstrate that such supporting type is successful in the special stratum, which could provide relevant references for similar projects.