摘要
季节冰冻区土质边坡在春融期经常发生浅层滑坡,现象表明:一般情况春融期滑坡面位于冻融土体交界面处,冻融界面处的土体抗剪强度直接影响该地区土坡稳定性。设计不同配比材料形成冻融界面的抗剪强度模型试验,得到对应不同土体含水量以及冻融循环次数条件下的剪应力,计算出不同含水量和不同冻融次数条件下对应的c,φ值,依据试验结果提出冻融界面土体抗剪强度参数值随着含水量和冻融次数变化时的损伤模型。研究结果表明,抗剪强度参数随该两影响因素的增加而发生损伤。
In seasonal frozen regions, shallow landslide hazards in soil slopes usually happen. The failure surface is always in the freezing and thawing surface of the soil slope because the direct factor of soil slope failure is the shear strength of the soil between the freezing and thawing surfaces, which is determined by the two parameters of Cohesion ＂c＂ and Friction angle＂φ＂. In this research a simulation experiment of freeze-thaw soil interface with different aggregate materials is designed by alternating the freeze-thaw cycle times and the water content of soil, then the c and the φ are obtained. Finally the deterioration model of the two shear strength parameters is put forward. The results show that the parameter of shear strength will be deteriorated due to the two above influential factors.
出处
《黑龙江工程学院学报》
CAS
2013年第3期28-32,共5页
Journal of Heilongjiang Institute of Technology
基金
黑龙江省自然科学基金项目(E201117)
黑龙江省普通高等学校青年学术骨干支持计划项目(1252G050)
关键词
道路工程
损伤模型
模拟试验
冻融界面
季节冰冻区
road engineering
deterioration model
simulation experiment
freezing and thawing surface
seasonal frozen region
