不同粒径渣体对弃渣场稳定性影响研究  

Research on stability of slag field affected by slag accumulation containing different particle size

作　　者：肖志红[1] 

机构地区：[1]贵州交通职业技术学院,贵州贵阳550008

出　　处：《人民长江》2014年第12期38-42,共5页Yangtze River

基　　金：国家自然科学基金项目"颗粒破碎对粗粒土力学性质影响研究"(41002104);贵州省交通厅科技项目"贵州省节能性公路交通建设研究"(2011321013)

摘　　要：受堆积成分影响,弃渣场极易失稳,引发严重的生态环境问题。目前国外对弃渣场稳定性的研究主要集中在宏观参数方面,微观参数方面的研究甚少。为此,运用颗粒流、重度增加法及边坡的监测算法,对比由不同颗粒粒径组成的弃渣场在自然堆积条件下的颗粒位置、最大不平衡力及稳定安全系数,进而确定滑动面的位置及影响范围,研究不同颗粒粒径对弃渣场稳定性的影响。研究结果显示,随着颗粒粒径的增大,弃渣场边坡的滑动面逐渐变小,渣体颗粒向下滑移的速度相对更快,滑动面变浅且影响区域变小,此时弃渣场的稳定性相对较好。研究方法及成果可为弃渣场的设计、施工提供理论基础。Affected by composition of slag accumulation, slag field is extremely easily suffered from instability failure, causing serious ecological environment problems. By now, most of the abroad research on the stability of slag field focused on macro parameters rather than on microscopic parameters. For studying the influence of different particle size of slag accumulation on soil field stability, the author attempts to contrast the particle position of slag field, the maximum unbalanced force and the stability safety factor under natural piling up condition by using Particle Flow Code （ PFC） algorithm, method of gravity increase and slope monitoring method, so as to determine position and the influencing area of slipped surface. Through comparing and analyzing the simulation results, it shows that with the increase of particle size, the slide face is smaller, the soil particles slides down faster, slip plane is shallower and the influenced area is relatively smaller, which is favorable to maintain soil field stability. The research methods and results can provide theoretical basis for the design and construction of soil field.

关 键 词：弃渣场 稳定性 颗粒粒径 颗粒流 重度增加法 

分 类 号：TV135[水利工程—水力学及河流动力学]