坝基深风化槽安全监测技术应用及成果分析

株洲航电枢纽闸坝基础经勘探查实发现有多处溶蚀风化深槽,这些风化深槽的存在破坏了坝基岩体的完整性,影响闸坝的稳定。设计部门对坝基深风化槽提出了处理方案,经计算和分析,处理方案在理论上是可行的。为验证深风化槽的工程处理效果和满足蓄水后安全运行监测需要,应用监测传感器对风化槽重点部位进行渗压、变形、应力应变等监测。本文介绍了深风化槽主要监测项目和监测仪器布设方案,通过整编分析观测数据,说明监测仪器能真实反映所监测部位的受力变形特点,起到工程安全监测和验证设计的效果,为株洲航电枢纽工程安全运行管理奠定了良好的基础。

Technology application and data analysis of safety monitoring on weathered deep troughs in a dam foundation

Several weathered deep troughs have been detected in the lock-dam foundation of the Zhuzhou Navigation and Power Project.The troughs would destroy the integrity of the dam foundation and affect the stability of the lock-dam.The designer brought about a treatment scheme,which was proved to be feasible theoretically after calculation and analysis.In order to validate the treatment effect on the weathered deep troughs and meet monitoring requirement of safe operation after impounding,parameters in seepage,deformation,stress and strain have been monitored at important positions of the weathered deep troughs.This paper introduces the major monitoring items and relevant layout of embedded instrument.Troughs analyzing the monitoring data,the results truly reflect the characteristics of stress and deformation at the monitored positions.The design was validated.This work established a good base for safe operation and management of the Zhuzhou Navigation and Power Project.