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本文介绍一种新型结构的沉陷观测基准点。它是利用两种不同膨胀系数的金属丝:不锈因瓦丝、不锈钢丝做为标志,埋在深处基岩上,以代替常用的双管(钢、铝管)基准点。这种结构的基准点已于1981年安装在太平哨水电站,经过多年的观测认为:结构简单、施工方便,精度较高,是沉陷观测较为理想的基准点。同时也对双管基准点的稳定性进行了分析。
This article introduces a new type of subsidence observation reference point. It is the use of two different expansion coefficient of the wire: stainless steel wire, stainless steel wire as a sign, buried deep bedrock, instead of commonly used double pipe (steel, aluminum pipe) benchmark. The reference point of this kind of structure was installed in Taiping Whistle Hydropower Station in 1981. After years of observation, it has the following features: simple structure, convenient construction and high precision, which are ideal reference points for subsidence observation. At the same time, the stability of double-tube reference point was also analyzed.