山区高速公路高填方边坡稳定性分析
|
摘要
山区高速公路过于陡峭,建设过程中可能会受到各种外力的侵蚀,高填方作为山区高速公路防护中的重要举措,其边坡稳定性分析成为了当前的热点课题。提出利用SLOPE对高填方边坡稳定性进行分析,选择某枢纽高速公路为例,结合该地区的具体情况,通过坡面的修整、边坡湿润、固土网垫的铺设、细沙土的撒铺、播种草籽、覆盖土工布、养护管理等步骤沿线构建高填方;对山区高速公路高填方边坡进行计算,通过同济启明星边坡的稳定分析软件SLOPE反算,获得边坡滑带土体的强度指标。实验中选取上述的枢纽高速公路SG-1标段中,三个比较有代表性的边坡断面当作实验对象,利用简化的Bishop法计算各个高填方边坡的断面于各种施工状况下安全系数;分析了三个断面坡体的表面关键位置水平位移,随着工况的变化情况;每天填筑1m,获得三个断面边坡坡脚的水平位移速率,随工况的变化情况,和路基的顶面沉降变化趋势。结果表明,K25+791.8断面在施工期安全系数是三个断面中最低的,但水平位移最大;K26+316.5断面水平位移总体上比K25+791.8断面小;K27+162.5断面安全系数最高,且水平位移最小,稳定性最好;K25+791.8、K26+316.5、K27+162.5三个断面路基顶面的沉降,与高填方的高度关系不大。
The mountainous expressway is too steep and may be eroded by various external forces in the process of construction. High fill,as an important measure in the protection of expressway in mountainous area,has become the hot topic in slope stability analysis. In this paper,SLOPE is used to analyze the stability of high fill slopes. Taking a hub expressway as an example,according to the specific conditions in this area,the slope repair,slope wetting,laying of solid earth mat,fine sand Of high-fill slope along the mountain highway,calculated through the stability analysis software SLOPE of Tongji Venus slope,get the edge Strength index of sloping zone soil. In the experiment,three representative slope sections of the above hub highway SG-1 are selected as experimental subjects,and the simplified Bishop method is used to calculate the sections of each high fill slope under various construction conditions The horizontal displacements of the critical position of the three sections of slope are analyzed,with the changes of working conditions. The horizontal displacement of the foot of the three sections is obtained by filling 1 m every day. With the change of working conditions,And the top subgrade settlement trend. The results show that the safety factor of K25 + 791. 8 section is the lowest among the three sections during the construction period,but the horizontal displacement is the largest. The horizontal displacement of sectionK26 + 316. 5 is generally smaller than that of K25 + 791. 8 section,and the safety coefficient of section K27 + 162. 5 is the highest,The displacement is the smallest and the stability is the best. The settlement of the top of subgrade with K25 + 791. 8,K26 + 316. 5 and K27 + 162. 5 is not related to the height of the high fill.
The mountainous expressway is too steep and may be eroded by various external forces in the process of construction. High fill,as an important measure in the protection of expressway in mountainous area,has become the hot topic in slope stability analysis. In this paper,SLOPE is used to analyze the stability of high fill slopes. Taking a hub expressway as an example,according to the specific conditions in this area,the slope repair,slope wetting,laying of solid earth mat,fine sand Of high-fill slope along the mountain highway,calculated through the stability analysis software SLOPE of Tongji Venus slope,get the edge Strength index of sloping zone soil. In the experiment,three representative slope sections of the above hub highway SG-1 are selected as experimental subjects,and the simplified Bishop method is used to calculate the sections of each high fill slope under various construction conditions The horizontal displacements of the critical position of the three sections of slope are analyzed,with the changes of working conditions. The horizontal displacement of the foot of the three sections is obtained by filling 1 m every day. With the change of working conditions,And the top subgrade settlement trend. The results show that the safety factor of K25 + 791. 8 section is the lowest among the three sections during the construction period,but the horizontal displacement is the largest. The horizontal displacement of sectionK26 + 316. 5 is generally smaller than that of K25 + 791. 8 section,and the safety coefficient of section K27 + 162. 5 is the highest,The displacement is the smallest and the stability is the best. The settlement of the top of subgrade with K25 + 791. 8,K26 + 316. 5 and K27 + 162. 5 is not related to the height of the high fill.
引文
[1]朱彦鹏,严锐鹏,杨晓宇.高填方机场滑坡体变形监测及稳定性分析[J].建筑技术,2017,48(4):389-392.
[2]缪存雀,陈亮,叶剑可,等.雁楠公路高路堤结构设计及整体稳定性分析[J].公路工程,2015,40(3):162-166.
[3]张江伟,李小军.地震作用下边坡稳定性分析方法[J].地震学报,2015,37(1):180-191.
[4]侯俊伟,唐秋元,李杨秋,等.西南某山区机场高填方边坡稳定性研究[J].重庆交通大学学报:自然科学版,2016,35(3):82-88.
[5]郝全明,杨振增,武利平.某露天煤矿边坡稳定性分析[J].煤炭技术,2015,34(1):237-239.
[6]潘国兵,李灵爱,李华蓉.基于关联度分析的高填方初期沉降预测模型可靠性研究[J].中国科技论文,2016,11(9):1021-1026.
[7]顾全,周正华,李永义,等.白鹤坪边坡稳定性分析[J].震灾防御技术,2017,12(3):529-538.
[8]李忠,杨俊.基于MPGA的复杂应力状态边坡稳定性分析[J].岩土力学,2015,36(5):1488-1495.
[9]陈文杰.娄衡高速红砂岩工程特性及高填路堤稳定性分析[J].公路工程,2015,40(2):182-185.
[10]刘晁君,王利楠.某露天矿含空区边坡稳定性分析[J].中国矿业,2017,26(6):121-126.
[11]靳静,于远亮.高速公路边坡的稳定性分析研究[J].科技通报,2016,32(2):193-196.
[12]蔡冻,陈东,吴松山,等.变电站边坡稳定性分析及治理技术[J].四川建筑科学研究,2015,41(3):70-72.
[13]张谭,郑宏,聂治豹.基于整体分析法的抗滑桩加固边坡稳定性分析[J].长江科学院院报,2016,33(6):109-114.
[14]刘泉.基于FLAC~(3D)软件的极端恶劣环境下边坡稳定性分析[J].金属矿山,2015,44(8):143-146.
[15]陈燕.EPON技术在高速公路视频监控中的应用[J].电子设计工程,2017,25(19):64-67.
[16]乔翔.基于极限平衡法的高边坡稳定性分析及处治措施[J].铁道建筑,2017,57(8):89-93.
[17]杨志华,李晓龙.基于几何控制的公路施工智能监控系统设计[J].计算机测量与控制,2017,25(7):129-131.
[18]杨磊.容乌高速公路边坡稳定性分析与安全防护分析[J].公路工程,2017,42(1):123-126.
[19]毕卿,胡昊,黄道正,等.大型公路建设项目中的项目风险评估模型仿真[J].计算机仿真,2016,33(4):223-226.
[20]刘顺青,洪宝宁,朱俊杰,等.粉状和砾状煤系土的水敏感性及边坡稳定性分析[J].科学技术与工程,2016,16(8):143-149.
[2]缪存雀,陈亮,叶剑可,等.雁楠公路高路堤结构设计及整体稳定性分析[J].公路工程,2015,40(3):162-166.
[3]张江伟,李小军.地震作用下边坡稳定性分析方法[J].地震学报,2015,37(1):180-191.
[4]侯俊伟,唐秋元,李杨秋,等.西南某山区机场高填方边坡稳定性研究[J].重庆交通大学学报:自然科学版,2016,35(3):82-88.
[5]郝全明,杨振增,武利平.某露天煤矿边坡稳定性分析[J].煤炭技术,2015,34(1):237-239.
[6]潘国兵,李灵爱,李华蓉.基于关联度分析的高填方初期沉降预测模型可靠性研究[J].中国科技论文,2016,11(9):1021-1026.
[7]顾全,周正华,李永义,等.白鹤坪边坡稳定性分析[J].震灾防御技术,2017,12(3):529-538.
[8]李忠,杨俊.基于MPGA的复杂应力状态边坡稳定性分析[J].岩土力学,2015,36(5):1488-1495.
[9]陈文杰.娄衡高速红砂岩工程特性及高填路堤稳定性分析[J].公路工程,2015,40(2):182-185.
[10]刘晁君,王利楠.某露天矿含空区边坡稳定性分析[J].中国矿业,2017,26(6):121-126.
[11]靳静,于远亮.高速公路边坡的稳定性分析研究[J].科技通报,2016,32(2):193-196.
[12]蔡冻,陈东,吴松山,等.变电站边坡稳定性分析及治理技术[J].四川建筑科学研究,2015,41(3):70-72.
[13]张谭,郑宏,聂治豹.基于整体分析法的抗滑桩加固边坡稳定性分析[J].长江科学院院报,2016,33(6):109-114.
[14]刘泉.基于FLAC~(3D)软件的极端恶劣环境下边坡稳定性分析[J].金属矿山,2015,44(8):143-146.
[15]陈燕.EPON技术在高速公路视频监控中的应用[J].电子设计工程,2017,25(19):64-67.
[16]乔翔.基于极限平衡法的高边坡稳定性分析及处治措施[J].铁道建筑,2017,57(8):89-93.
[17]杨志华,李晓龙.基于几何控制的公路施工智能监控系统设计[J].计算机测量与控制,2017,25(7):129-131.
[18]杨磊.容乌高速公路边坡稳定性分析与安全防护分析[J].公路工程,2017,42(1):123-126.
[19]毕卿,胡昊,黄道正,等.大型公路建设项目中的项目风险评估模型仿真[J].计算机仿真,2016,33(4):223-226.
[20]刘顺青,洪宝宁,朱俊杰,等.粉状和砾状煤系土的水敏感性及边坡稳定性分析[J].科学技术与工程,2016,16(8):143-149.