混凝土拱坝多测点确定性位移监控模型研究

混凝土拱坝对温度变化十分敏感，在建立混凝土拱坝位移监控模型时，温度分量的确定一直是建模的重点和难点。目前很多拱坝坝体温度监测资料不完整，很难用来确定坝体的温度场和变温场。本文提出当拱坝内部温度监测资料较少时，采用朱伯芳法估算库水水温，以气温和水温确定大坝的温度边界，用有限元方法计算大坝的温度场和位移场，进而建立监控模型。以清江隔河岩重力拱坝为例，建立了一维多测点确定性位移监控模型，取得了较好的效果。

Research on Multiple Point Deterministic Displacement Monitoring

Concrete arch dam is sensitive to the temperature change,so the defining of temperature component remains a key but difficult point during the modeling of monitoring displacements of concrete arch dam. Currently, many arch dams have incomplete internal temperature monitoring data, which makes it hard to identify the temperature field and change field. This paper proposes to make an estimate of reservoir water temperature with Zhu Bofang method and then make use of air temperature and water temperature to define the temperature boundary of arch dams in case of insufficient internal temperature monitoring data through carrying out finite element method to work out the temperature field and displacement field of the dam.Then a monitoring model will be built..The authors build a one-dimension multiple-survey-point deterministic displacement monitoring model of Qingjiang Geheyan gravity arch dam successfully.