地下水位变化对金州水准基岩标石的影响分析

Analysis on the Influence of Groundwater Level Change on the Bedrock Mark of Jinzhou Level

对辽宁金州地震台地下水位上升引起水准基岩标石底部岩层的应力变化进行定性和定量分析,并使用分层总和法计算基岩标石受到的影响量。研究结果表明,金州水准所受地下水的干扰,主要是标石底部的基岩在地下水位变化的作用下而发生形变所致,其影响的大小与水位变化幅度、水容重、基岩的压缩模量和孔隙度有关。

The change of rock stress at the bottom of the leveling bedrock mark caused by the rise of Jinzhou Seismic Station groundwater level is analyzed qualitatively and quantitatively,and then the influence on the bedrock mark is calculated by the method of layered summation.The results show that the disturbance of groundwater to Jinzhou level is caused by the deformation of the bedrock at the bottom of the standard stone due to the change of water level,the influence is related to the change amplitude of water level,water bulk density,compression modulus and porosity of the bedrock.