冲击成孔配合回旋终孔工艺在象山港大桥及接线工程桩基施工中的应用

Application of Compact-shock Boring with Rotating Excavation for Pile Foundation Construction in Xiang’shan Port Bridge and Junction

选择合适的桩基成孔工艺是决定桩基施工质量及进度的关键因素.根据象山港大桥及接线工程的地质情况,通过对桩基施工工艺进行比选及试验,最终确定采用冲击成孔配合回旋终孔工艺,保证了桩基施工的质量、安全和进度.同时也提出该工艺的关键控制技术,使其可供具有相似地质情况的工程借鉴使用.

Selecting appropriate technique of pore-forming is critical in determining the project quality and scheduling the pile foundation construction.On the basis of the geological condition in Xiang’shan port bridge and its junction characteristics,the technique of pore-forming with rotating excavation is proposed in a bid to ensure the quality,safety and progressing for the building of the pile foundation.The proposed approach may be applied to other engineering projects with the similar geological conditions.