电位器式位移计在土石坝安全监测中的应用

主要介绍电位器式位移计多功能性在几个工程中的应用情况。以单支电位器式位移计为核心组成的TS型土位移计用于观测心墙与岸坡混凝土垫层的剪切位移或拉伸位移，该仪器已经在多座心墙堆石坝应用，及时地监测了心墙的变形状况。以双支电位器式位移计为核心组成的TST型面板脱空位移计用于监测面板的脱空变形和剪切变形，为面板脱空处理的方案的确定以及对面板脱空处理后的效果的判断提供依据，该仪器已经在国内的高面板堆石坝成功应用，及时获得了面板脱空数据及变化曲线。以三支电位器式位移计为核心组成的TSJ型周边缝测缝计用于监测周边缝的开合度和剪切变形、垂直面板方向的沉降变形，该仪器已经在国内多座面板堆石坝应用，实时地取得周边缝的变形状态及变化曲线，为大坝安全评价提供了依据。

Application of potential displacemeter in safety monitoring of embankment and rockfill dams

The potential displacemeter is the gauge for monitoring displacements of embankment and rockfill dams. A brief introduction is given to the function of the potential displacemeter as well as its application in several dam projects. The TS soil displacemeter with single potential displacemeter being the core, applied in many core wall rockfill dams, might be employed to observe the shear displacement or tension displacement between the core wall and the concrete cushion, and deformation of the core wall is monitored in time. The TST face displacemeter with double potential displacemeters being the core is employed to monitor separating deformation and shear deformation of faces so as to provide basis for the determination of treatment schemes and the treatment effectiveness of the separating faces. It has been successfully applied in high concrete face rockfill dams, which gives separating data and variation curves of faces in time. The TSJ joint meter with three potential displacemeters being the core is taken to monitor the opening and shear deformation of joints as well as the settlement deformation in the direction of vertical faces. It has been applied in many concrete face rockfill dams in China and has yielded the deformation and variation curves of joints in time, thus providing basis for the safety evaluation of dams.