岩溶区临近重要建筑大直径桥桩施工关键技术

Key Technology of Large Diameter Bridge Pile Construction in Karst Area Adjacent to Important Buildings

以位于岩溶区临近重要建筑大直径桥桩工程为研究对象,对其关键施工技术进行研究,采用预处理方法解决溶洞漏浆塌孔沉降难题,针对入岩要求高采用扩孔技术,解决了大直径旋挖钻机入岩难题,显著降低施工震动对周边建筑物影响,施工过程安全可靠,可为类似工程提供施工经验和参考。

Taking the large-diameter bridge pile engineering located near important buildings in karst areas as the research object,the key construction techniques are studied.The pre-treatment method is used to solve the problem of cave leakage,collapse and settlement.In re‐sponse to the high requirements for rock entry,the hole expansion technology is adopted to solve the problem of large-diameter rotary drill‐ing rig entering the rock,significantly reducing the impact of construction vibration on surrounding buildings.The construction process is safe and reliable,and can provide construction experience and reference for similar projects.