大地测量与地球动力学2011，Vol.31Issue(1)：34-38,43,6.
钻孔应变观测影响因素的数值模拟分析
NUMERICAL SIMULATION OF AFFECTING FACTORS ON BOREHOLE STRAIN-METER OBSERVATION
摘要
Abstract
On the basis of the "casing-cement sheath-formation" system, the three dimensional finite element model was built. With this model, and under the non-uniform stress conditions, the stress change characteristics before and after the borehole drilling were studied and the effects of the changes of the elastic modulus of the rock,cement and sonde casing, the Poisson ratio, the cement thickness and the expansion coefficient of the system on the component strain and plane strain after drilling were inquired as well. The results indicate that the influence incidence from the borehole drilling is probably 1.5 times as big as the aperture. The influence of each parameter' s change on the strain is different, whereas the component strain response trend to the exterior load is primarily alike.Otherwise, under the uniform stress conditions, the effect of the cement thickness on the strain is related to the cement elastic modulus, but the plane strain is of negative correlation with the expansion coefficient.关键词
分量应变/应力场/弹性模量/面应变/数值模拟Key words
component strain/ stress field/ elastic modulus/ plane strain/ numerical simulation分类
天文与地球科学引用本文复制引用
李玉江,陆远忠,陈连旺,詹自敏,叶际阳..钻孔应变观测影响因素的数值模拟分析[J].大地测量与地球动力学,2011,31(1):34-38,43,6.基金项目
中央级公益性科研院所基本科研业务专项(ZDJ2009-13,ZDJ2010-12) （ZDJ2009-13,ZDJ2010-12）
