1.The result shown, in North China dominant orientation of the maximum horizontal principal stress is NEE-EW orientation.
结果表明，大华北地区的优势最大水平主应力方向应该为北东东—东西向。
2.The stress path that prevails in a pavement under wheel loading includes stress reversal causing rotation of the principal stress direction.
在车轮的荷载作用下，整个路面的应力过程包括导致主应力方向发生旋转的应力反向。
3.The maximUm difference of failure strength among various principal stress direction is up to 30%.
不同主应力方向的破坏强度最大差别可达30%。
4.It was found that the undrained shear behavior of loose sands was considerably dependent on the orientation of the principal stress.
研究表明，主应力方向对在不排水条件下饱和松砂的单调剪切特性具有显著影响。
5.Cracks are distributed in the form of shaft film when the minimum principal stress direction is horizontal.
当竖直方向为最小主应力方向时裂纹的空间分布呈水平片状；
6.The degree of natural fracture opening is determined by horizontal differential principal stress and features of rock mechanics.
水平主应力差和近缝面岩石力学特性是影响天然裂缝张开程度的主要因素；
7.The stability of deep tunnel shows the phenomenon of intermediate principal stress effect and interval characteristics.
深埋隧洞围岩的稳定性具有中间主应力效应及其区间性的特征。
8.The magnitudes of the maximum and the intermediate principal stress are high; and both of them are very close.
第一和第二主应力量值比较高，而且两者量值也比较接近。
9.Results reveal that the stress magnitude is relatively low and the maximum horizontal principal stress' direction is NW.
结果表明：应力量值较低，最大水平主应力方位呈NW向。
10.The cave's initial principal stress is tectonic stress, and the max main stress direction is perpendicular to the power house's stalk line.
洞室地应力以构造应力为主，其最大主应力方向与厂房轴线方向近垂直。