钻孔应变仪探头与井孔不同耦合材料的试验

EXPERIMENT OF DIFFERENT COUPLING MATERIALS OF SNODE AND STRAIN GAUGE WITH BOREHOLE

对应变仪的探头进行不同耦合材料的试验。实验结果说明探头在不同耦合材料情况下取得的观测结果是不同的,金属棒作为耦合材料效果最好,它具有减小仪器零漂的优点。

We take some different coupling materials to carry out an experimental research on the effects of different coupling materials between the snode and borehole using the hole-shaped strain apparatus. Through the experiments, we can see that the observations with the different coupling materials were different even we are using the same snode. The best results are to insert a metal rod as a composite of quartz sand in the coupling body, it has the advantage that the shortest time we need is just anhour from install the snode till perfectly record the solid tide, and the instrument zero drift is small. These data has a positive significance to explore what kind of coupling material we should use and how to carry out the earthquake emergency observations.