応力と変形からみた岩盤斜面の安定に関する基本的検討
岩盤斜面に関する研究 (第1報)
1981 年 97 巻 1120 号 p. 437-443
詳細
1981 年 97 巻 1120 号 p. 437-443
It is one approach to estimate slope stability to know the stress and deformation in the region of the slope. The factors affecting slope stability could be as follows: mechanical property of rock, angle and height of slope, horizontal curvature, initial stress and others. We clarified these factors are how to affect slope stability by the finite element analysis. The results may be shown below.
(1) The stress near the toe concentrates at slope angle above 45° and increases in proportion to height of slope.
(2) The slope with convex curvature in the projection to horizontal plane is more stable than the slope with straight one. This trend is remarkable when the ratio of radius of curvature to slope height is lower than 0.5.
(3) In case of high initial horizontal stress, the stress near the toe increases in proportion to the lateral coefficient K and does not increase by slope angle. And the increase of tensile stress region at the crest is easy to make crack there.
(4) As the excavation advances, the failure zone extends along the surface of slope and makes the slope unstable.
