考虑不同堆载过程的弃渣场稳定性分析
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摘要
以山西省某工程弃渣场为例,通过建立弃渣场有限元分析模型,分析其内部应力大小及分布情况,并考虑不同堆载过程的渣场稳定性变化情况。结果显示,渣场边坡位移变形主要集中在边坡下部,在渣场坡脚处有局部破坏趋势。考虑压坡脚式(顺排)和覆盖式(逆排)两种堆载顺序方式,堆载后对原有边坡整体稳定性造成削弱趋势;但相较而言,覆盖式堆载所产生的最大位移平均值和最大应变平均值均小于压坡脚式,覆盖式堆载优于压坡脚式。
The waste dump slope is made up of loose slag body with poor engineering performance and poor skid resistance. Taking the abandoned slag yard of a project in Shanxi Province as an example,by establishing the finite element analysis model of the abandoned slag yard,the size and distribution of internal stress are analyzed,and the stability changes of the slag yard in different loading processes are considered. The results show that the displacement and deformation of the slag yard slope are mainly concentrated in the lower part of the slope,and there is a trend of local failure at the foot of the slag yard slope. Considering the two loading sequence modes of foot-loading and cover-loading,the overall stability of the original slope will be weakened after loading,but in comparison,the average value of maximum displacement and maximum strain produced by cover-loading are less than that of foot-loading,and the cover-loading is better than that of foot-loading.
The waste dump slope is made up of loose slag body with poor engineering performance and poor skid resistance. Taking the abandoned slag yard of a project in Shanxi Province as an example,by establishing the finite element analysis model of the abandoned slag yard,the size and distribution of internal stress are analyzed,and the stability changes of the slag yard in different loading processes are considered. The results show that the displacement and deformation of the slag yard slope are mainly concentrated in the lower part of the slope,and there is a trend of local failure at the foot of the slag yard slope. Considering the two loading sequence modes of foot-loading and cover-loading,the overall stability of the original slope will be weakened after loading,but in comparison,the average value of maximum displacement and maximum strain produced by cover-loading are less than that of foot-loading,and the cover-loading is better than that of foot-loading.
引文
[1]罗强.岩质边坡稳定性分析理论与锚固设计优化研究[D].长沙:中南大学,2010.
[2]杨森.龙泉山隧道渣场选址及堆置稳定性[D].成都:西南交通大学,2017.
[3]吴谦,毛雪松,刘龙旗,等.某弃渣场边坡稳定性的可靠度分析[J].桂林理工大学学报,2017,37(3):475-480.
[4]陈武.山区高速公路弃渣场边坡渗流及稳定性分析[J].公路与汽运,2018(187):71-74,141.
[5]毛雪松,宋玉品,吴谦,等.渗流条件下弃渣场边坡的稳定性分析[J].兰州理工大学学报,2018,44(2):139-143.
[6]袁木,秦光辉,张伟锋.降雨条件下水电站弃渣场边坡渗流特性及其稳定性分析[J].东北水利水电,2018(9):40-44.
[7]保华富,李仕胜,魏友庆.弃渣场边坡稳定性安全监测及成果分析[J].云南水电技术,2007(3):91-97,104.
[8] E. Eberhardt,D. Stead. Incorporating the Effects of Groundwater and Coupled Hydro-Mechanical Processes in Slope Stability Analysis[M]. Natural and Artificial Rockslide Dams,2011:500-517.
[9]时卫民,郑颖人.摩尔-库仑屈服准则的等效变换及其在边坡分析中的应用[J].岩土工程技术,2003(3):155-159.
[2]杨森.龙泉山隧道渣场选址及堆置稳定性[D].成都:西南交通大学,2017.
[3]吴谦,毛雪松,刘龙旗,等.某弃渣场边坡稳定性的可靠度分析[J].桂林理工大学学报,2017,37(3):475-480.
[4]陈武.山区高速公路弃渣场边坡渗流及稳定性分析[J].公路与汽运,2018(187):71-74,141.
[5]毛雪松,宋玉品,吴谦,等.渗流条件下弃渣场边坡的稳定性分析[J].兰州理工大学学报,2018,44(2):139-143.
[6]袁木,秦光辉,张伟锋.降雨条件下水电站弃渣场边坡渗流特性及其稳定性分析[J].东北水利水电,2018(9):40-44.
[7]保华富,李仕胜,魏友庆.弃渣场边坡稳定性安全监测及成果分析[J].云南水电技术,2007(3):91-97,104.
[8] E. Eberhardt,D. Stead. Incorporating the Effects of Groundwater and Coupled Hydro-Mechanical Processes in Slope Stability Analysis[M]. Natural and Artificial Rockslide Dams,2011:500-517.
[9]时卫民,郑颖人.摩尔-库仑屈服准则的等效变换及其在边坡分析中的应用[J].岩土工程技术,2003(3):155-159.