小浪底大坝作为枢纽的重要建筑物为监测其内外部变形情况、基础和周边渗流渗压情况、内部结构应力应变状况等内容在大坝表面和内部埋设安装了大量的观测仪器和监测点定期对这些仪器和监测点进行测定以确定各部位的变化情况。外部变形监测主要由平面监测和沉降监测两方面本文只探讨平面位移监测。 Xiaolangdi dam as the hub of the important buildings in order to monitor its internal and external deformation, infiltration and seepage of the basic and surrounding conditions, the internal structure of the stress and strain conditions such as buried in the dam surface and internal installation of a large number of observation equipment and monitoring points on a regular basis These instruments and monitoring points were measured to determine the changes in various parts. External deformation monitoring mainly by plane monitoring and settlement monitoring of two aspects of this article only discusses the plane displacement monitoring.