龙开口水电站大坝坝基扬压力监测数据对比分析  

Comparison and Analysis of Monitoring Data for Uplift Pressure of Dam Foundation of Longkaikou Hydropower Station

作　　者：李加裕 杨光 周艳和 LI Jia-yu;YANG Guang;ZHOU Yan-he(Huaneng Longkaikou Hydropower Co.,Ltd.,Dali 671505,China)

机构地区：[1]华能龙开口水电有限公司,云南大理671505

出　　处：《云南水力发电》2023年第4期70-74,共5页Yunnan Water Power

摘　　要：扬压力监测是碾压混凝土重力坝安全监测项目的关键内容之一,是大坝安全性和稳定性分析的重要依据。目前,大坝扬压力监测基本已实现自动化测量,但是自动化测量的数据可靠性和稳定性依然存在诸多问题,自动化测量不能真正替代人工观测,为此还需要定期开展人工测量。通过对龙开口水电站48个坝基测压管近两年的观测数据,与相同时间段的人工测值进行比对,绘制测值随时间变化的过程线对比图,对测压管自动化与人工监测数据的差异性进行定量、定性分析,依托过程线分析法并结合现场实际条件探究主要的误差来源,并提出了相应的解决对策,为提升龙开口水电站扬压力监测成果的可靠性和准确性奠定了基础,分析方法和误差校正对策可推广运用于其他水电工程。Uplift pressure monitoring is one of the key contents of safety monitoring project of RCC gravity dam and an important basis for safety and stability analysis of dam.At present,automatic measurement has been basically realized for dam uplift pressure monitoring,but there are still many problems in data reliability and stability of automatic measurement.Automated measurement can not really replace manual observation,so manual measurement needs to be carried out regularly.In this paper,the observation data of 48 pressure measuring pipes on dam foundation of Longkai Hydropower Station in recent two years are compared with those measured manually in the same time period.The process line comparison diagram of measured value changing with time is drawn to quantitatively and qualitatively analyze the difference between automatic pressure measuring pipe and manual monitoring data.Based on the process line analysis method and the actual conditions on site,the main error sources are explored and the corresponding solutions are put forward,which lays a foundation for improving the reliability and accuracy of uplift pressure monitoring results of Longkaikou Hydropower Station.Analysis methods and error correction countermeasures can be widely used in other hydropower projects.

关 键 词：龙开口水电站 扬压力 人工与自动化监测 对比分析 误差 

分 类 号：TV698.12[水利工程—水利水电工程]