Angles of repose, angles of shearing resistance and angles of talus slopes
Angles of repose, angles of shearing resistance and angles of talus slopes
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DOI：
10.1002/esp.3290020408
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发表时间：
1977-10
影响因子：
3.3
通讯作者：
M. A. Carson
中科院分区：
文献类型：
--
作者：
M. A. Carson
最近的论点是，距骨斜面的直线部分通常以小于距骨材料的休止角的角度站立，这与休止角测量中使用的不同测试程序有关。对粗糙、分选良好的有角度碎片的观察表明，在实验室倾斜箱测试中确定的角度值与通过快速离散颗粒落石在室外锥体堆积过程中确定的角度值之间没有显着差异。然而，测量确实表明，样本尺寸（相对于颗粒尺寸）较小的实验室测试会产生更陡的休止角，这在现场环境中是不切实际的。详细描述了石灰石采石场中碎石堆积形成的大型锥体发生的过程和形状变化。这些观察结果表明，离散颗粒落石和距骨材料雪崩的过程可能并不像之前建议的那样相互独立，并且与锥体材料的安息角值（35°）一起，为传统观点提供了一些支持，即距骨斜坡实际上处于或接近于距骨材料的安息角。
Recent arguments that the straight parts of talus slopes stand, in general, at angles less than the angle of repose of the talus material are considered in relation to different test procedures used in the measurement of the repose angle. Observations on coarse, well sorted, angular fragments showed no significant difference between the values for this angle determined in laboratory tilting-box tests and determined during outdoor cone build-up by rapid discrete particle rockfall. Measurements did indicate, however, that laboratory tests in which specimen size (in relation to particle size) is small produce steeper repose angles which are unrealistic in the field context. A detailed description is provided of process and form changes which occurred on large cones built up by stockpiling of crushed stone in a limestone quarry. These observations indicate that the processes of discrete particle rockfall and of avalanching of talus material may not be as independent of each other as previously suggested, and, together with the values of the repose angle of the cone material (35°), provide some support for the traditional view that talus slopes do, in fact, stand at or close to the repose angle of the talus material.