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本文考虑了元件预加接触压力、套芯应力解除和元件率定等手续,对采用接触预压式元件的钻孔变形法地应力测量的全过程进行力学分析,得出了孔壁折算位移的精确公式,从而揭示了初始接触压力、套芯解除半径和率定实验的试件大小等因素对折算位移的影响。文中对围压率定法优于哈斯特率定法的原因作了进一步解释;还讨论了围压法率定中围压室隔层对围压传递的影响。文末提出了恰当使用这种地应力测量法的若干建议。
In this paper, the pre-contact pressure of components, the stress relief of core and the rate of components are taken into account. The mechanical analysis of the whole process of stress measurement by drilling deformation of contact precompression elements is carried out. The precise formula is used to reveal the influence of the initial contact pressure, the radius of core removal and the size of the test specimen on the translation displacement. In this paper, the reasons why the confining pressure rate is better than the Hastell’s rate method are further explained. The influence of the confining pressure compartment on the confining pressure propagation is also discussed. At the end of the article, some suggestions for proper use of this method of geodetic stress measurement are proposed.