摘要
在考虑拉萨地区周边主要道路沿线广泛分布的冻融现象基础上,探究了溜砂坡在有无冻融作用下,粒径不同和颗粒混杂程度均匀,且伴随着含水率增大的情况,冻融作用对于砂坡天然休止角的影响。试验结果数据与对比分析表明:粒径相对较小的砂坡对冻融作用的抵抗能力较强,颗粒混杂程度均匀(级配好)的砂坡也对冻融作用具有较强的抵抗能力;同时冻融会增加斜坡失稳的不确定因素。
By considering freezing and thawing surrounding the widely distributed along the main road in the Lhasa area,in the case of different particle size and uniform degree mixed of particle and along with the increasing moisture content,freezing and thawing was studied for the impact of natural sand slope angle of repose of sand-sliding slope. The test results and comparative analysis show that the sand slope with smaller particle size and uniform particle mixing degree have stronger resistance to freezing and thawing. The uncertainty of slope instability is increased by the freezing and thawing conditions.
引文
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