橡胶坝冬季结冰情况的观测

橡胶坝冬季结冰运行，已成为橡胶坝设计、安全运行的重要课题。通过对五台县郭家寨水库橡胶坝两年冬季结冰运行的原型观测，分析坝袋内各点的温度变化情况及成因，发现大气降温为主要因素；坝袋内温度场的变化能反映结冰范围以及冰层厚度；人工补水可以调节坝袋内冰层厚度。实践证明，只要设计合理，管理得当，橡胶坝冬季运行是可行的。从而为橡胶坝冬季结冰运行提供了科学依据，可供同类工程参考和借鉴。

The Observation of the Frozen Condition inside Rubber Dam

The winter running of rubber dam under frozen condition is a very important subject of the design and safe running of rubber dam.On the basis of prototype observation that took two years on the rubber dam of Guojiazhai Reservoir of Wutai county during winter frozen period, and by meams of analyzing temperature change situation and cause of formation inside the rubber dam ,the following outcomes are obtained:1) the drop of air temperature is the main factor that influences the frozen situation inside rubber dam, 2)the change of temperature field inside rubber dam can reflect the frozen scope and the ice layer thickness, 3)the ice layer thickness can be regulated by supplementing water into dam. It is proved by the practice that the running of rubber dam during winter is feasible under the condition of reasonable design and proper management. These supply scientific basis for the running of rubber dam during the frozen condition of winter and can be considered as reference for the other project.