基于监测系统的某干施工围堰渗漏的发现及处理

渗漏问题的难点在于渗漏点位于地下,无法直接观测,既难以直接断定是否渗漏,又难以确定渗漏的具体范围及评价堵漏措施的治理效果。某大型干施工挖入式港池项目,根据监测异常现象(位移速率过大、累计变形大、气泡、涌水等)并结合监测数据发现了围堰渗漏隐患;通过堰体各区段实测水位相互对比及与理论计算水位对比,确定渗漏范围;通过堵漏前后的日水平位移、堰体水位、渗流量的对比,评判堵漏措施的治理效果。

Detection and treatment for leakage of a dry-construction cofferdam based on monitoring system

The difficulty of seepage problem lies in the fact that the seepage point is underground and can not be directly observed.It is difficult to directly determine whether it is leaked or not,and it is also difficult to determine the specific scope of seepage and evaluate the effect of leak-stoppage measures.In a large-scale dry-construction dig-in basin project,the cofferdam leakage was discovered by monitoring anomalies (excessive displacement rate,large accumulated deformation,bubbles,water burst,etc.) and monitoring data.The seepage scope was found out by comparing the measured water levels in different cofferdam sections with each other and the theoretical water level.The effect of leak-stoppage measures was evaluated as per comparison on the daily horizontal displacement,water level of cofferdam and seepage flow before and after anti-leakage measures were taken.