深水湍急河流水上勘探施工工艺与技术措施

Construction Process of Exploration on Deep and Rushing River and the Technical Measures

结合芜湖长江公路二桥水上勘探工程实例,对深水湍急河流段的水上勘探施工工艺和施工安全管理进行了总结,同时主要针对施工过程中出现的钻探平台准确抛锚定位、固定,护孔套管的固定,护孔套管弯曲、变形、断裂,水位涨、落,护孔套管的伸缩等4大技术难点问题,利用现场现有条件,在保证工期和充分降低成本的情况下,采取了行之有效的技术处理措施,大大降低了钻探成本,顺利完成了钻探施工任务,获得了良好的经济效益和社会效益。

Combining with the on-water exploration engineering example of Wuhu Yangtze river highway bridge, the paper summarizes the construction technology and construction safety management in deep and rushing river section. With the ex- isting conditions, effective technical measures were adopted mainly according to the accurate anchoring and positioning of drilling platform; protecting casing fixation; bending, deformation and fracture of protecting hole casing; fluctuation of the water level and casing expansion, the drilling cost was greatly reduced and the good economic benefit and social benefit were obtained.