软土地基敷管节点泄漏事故处理

Treatment for Node Leakage Accident of Buried Pipe in Soft Subgrade

瑞安市自来水公司长距离引水管线在平稳运行三年后连续发生多起泄漏和接口崩裂事故,经分析认为软土蠕变是事故的主要原因,管道弯管支墩基础和背土在长期的负载下出现微量的沉降和位移,导致节点刚性接口破坏。对破坏的过程进行分析后,提出了软土地基敷管弯管支墩基础的处理建议。

Several leakage and joint bursting crack accidents have taken place continuously for long-distance water diversion pipeline of Rui'an Water Supply Company after three years' stable running.Through analysis,the soft soil creep is the main reason,breakdown of rigid joint is caused by minute sagging and displacement between bend buttress pier foundation and back soil under long-run loading.According to analysis on the destruction process,treatment advice was put forward on bend buttress pier foundation for laying pipe in soft soil subgrade.