The test results show that the porosity of sandstone decrease with the increasing effectivestress at the fixed temperature level, following the law of negative exponent.
试验结果表明,在温度水平一定的条件下,砂岩的孔隙度随有效应力的增加而呈负指数规律减小;
2
Distributive law of atmospheric pressure and effectivestress in depths is also given out.
并给出了大气压力及有效应力沿深度的分布规律。
3
The paper applies the nonlinear soil yield law of "principle of effectivestress" based on porous medium to study influence of pressure distribution to adhesive force.