泥岩岩质边坡破坏过程的模型试验研究

Research on the Model Experiment of Failure Process of Mudstone Rock Slope

为揭示泥岩岩质边坡在环境荷载以及由于边坡倾角改变引起的失稳过程,采用二维边坡模型,对不同坡脚、结构面填充条件下的岩质边坡破坏过程进行了详细的试验研究。通过模拟人工降雨条件下的岩质边坡破坏揭示了干湿循环的渐进性物理风化过程;对有无干湿循环、填充物以及不同结构面倾向的泥岩岩质边坡的破坏进行对比研究,揭示泥岩边坡破坏的影响因素。利用工业相机采用非接触手段采集边坡破坏的发生、发展过程,对破坏形态进行归纳总结。结果表明:泥岩岩质边坡破坏与边坡倾角、坡脚、结构面填充物及外部环境有密切关系;反倾边坡破坏易从坡顶关健体破坏并迅速扩展,从而导致整体垮塌;泥岩岩质边坡坡面处应力集中最严重,破坏从坡面开始并迅速往坡内发展,导致边坡的整体失稳。最后结合实验结果,给出了具体的工程建议。

In order to reveal failure progress caused by environmental loads as well as change of obliquity of slopes in mudstones,two-dimensional mudstone model of slopes are carried out,under the condition of different feet,fill discontinuities of rock slope to investigate the failure process through experiments,rock slope by artificial rainfall damage under simulated conditions to reveal the gradual physical weathering processes of wet and dry cycles.on whether the wet-dry cycle,fillers and different structures are destroyed.A comparative study reveals mudstone slope failure factors by using industrial cameras with the method of non-contact means of acquisition.To observe process of slope failure,the failure modes are summarized.Results indicate that mudstone rock slope destruction is closely related to slope inclination,toe,the filler surface structure and external environment.Anti-dumping is easily damaged from the top of the hill slope failure shut fitness and rapid expansion,thus resulting in an overall collapse;stress concentration of mudstone rock slope is most serious in surface,damage of the slope began from the top of the slope and quickly leads to overall lost stability.Finally,based on experimental results,specific project proposals are given.