山区高填路堤沉降特征研究
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摘要
针对山区高速公路高填路基易产生不均匀大沉降的特征,以西北地区某山区高速公路为对象,结合现场实测数据和有限元法对不同高填土路基沉降影响因素进行分析,获得高填路基的沉降变化曲线。研究结果表明:山区高填路基结构在路基中线位置处产生最大沉降量,沉降量由中线向两侧呈对称分布,表现出中间大两头小的凸形结构;随着路基高度的增加,回弹模量减小,填料容重增大,路基沉降量增大,不同路面结构对路基沉降变化影响并不大;在实际施工过程中,当路基、底基层沉降完成后,对已完成的底基层和基层结构进行补充后再填筑基层,产生的沉降要更为合理。
in view of the characteristics of uneven and large settlement of high filling subgrade of mountainous expressway,a mountain expressway in northwest China is taken as the object. Based on the field measured data and the finite element method,the influence factors of the differential settlement of different high fill subgrade are analyzed,and the differential settlement curve of the high fill subgrade is obtained. The results show that the maximum settlement of the high filling subgrade in mountainous area is produced at the center of the roadbed,and the settlement is symmetrically distributed from the middle line to the two sides,showing a convex structure with big and small ends in the middle,and with the increase of the height of the roadbed,The modulus of springback decreases,the bulk density of filler increases,and the settlement of subgrade increases. The influence of subgrade settlement change is not great; when the subgrade and the base course settlement is completed the completed base course and the base structure are supplemented and then the base course is filled in which the settlement is more reasonable.
in view of the characteristics of uneven and large settlement of high filling subgrade of mountainous expressway,a mountain expressway in northwest China is taken as the object. Based on the field measured data and the finite element method,the influence factors of the differential settlement of different high fill subgrade are analyzed,and the differential settlement curve of the high fill subgrade is obtained. The results show that the maximum settlement of the high filling subgrade in mountainous area is produced at the center of the roadbed,and the settlement is symmetrically distributed from the middle line to the two sides,showing a convex structure with big and small ends in the middle,and with the increase of the height of the roadbed,The modulus of springback decreases,the bulk density of filler increases,and the settlement of subgrade increases. The influence of subgrade settlement change is not great; when the subgrade and the base course settlement is completed the completed base course and the base structure are supplemented and then the base course is filled in which the settlement is more reasonable.
引文
[1]王晨竹.山区高速公路路基差异沉降特性分析及对策探讨[J/OL].山东农业大学学报(自然科学版),2018(05):1-4
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[15] Wilk. N,Ye Yong. Field monitoring and analysis of differential settlement of subgrade adjusted by gravel cushion[J]. Journal Of Advanced Transportation,2014(05):9-12.
[16] Fujiwara. Influence of uneven settlement on dynamic characteristics of Ballastless track subgrade[J]. Journal Of Advanced Transportation Engineering,2014(10):17-21.
[17]邱延俊,高毅.高速公路拓宽工程路基沉降控制措施[J].山西建筑,2014,40(08):165-166.
[18]郑传超,韦先林,汪益敏.高速公路扩建工程路面施工对路基沉降的影响[J].公路,2013(08):155-160.
[19]陈民勇,刘宇,陈锐,等.拓宽路基变形的流固耦合数值分析[J].路基工程,2013(04):39-42.
[2]唐红.公路路基拓宽差异沉降控制关键技术及工程应用[J].城市道桥与防洪,2018(07):63-66,75,9.
[3]王志伟.山区高速公路路基差异沉降特性与控制措施分析[J].设备管理与维修,2018(11):121-122.
[4]郭建红.石郑客运专线路基设计有关问题的研究[J].铁道工程学报,2007(04):16-19.
[5]黄琴龙,凌建明,钱劲松.新老路基工后差异变形对路面结构的影响[J].华东公路,2006(04):23-26.
[6]李永鸿,余志鹏,吴张中,等.轻量土技术在道路路基和桥台填筑中的应用[J].施工技术,2005(09):25-27.
[7]黄琴龙,凌建明,钱劲松.新老路基工后差异变形对路面结构的影响[J].同济大学学报(自然科学版),2005(06):759-762.
[8]梁靓,李波.高速公路改扩建工程路基拼接设计探讨[J].华东公路,2016(06):50-51.
[9]袁堃,汪双杰,牛富俊,等.多年冻土拓宽路基差异沉降特征分析[J].中国公路学报,2016,29(09):21-28.
[10]陈向军.改扩建公路路基沉降规律研究[J].交通科技,2016(04):77-80.
[11]甄俊杰.泡沫轻质土处治新旧路基差异沉降性能的研究[J].山西交通科技,2016(02):1-3,18.
[12]戴江涛.高速公路拓宽方式对路基沉降的影响分析[J].交通世界,2016(02):24-25.
[13]徐文龙.现代有轨电车路基设计的几点思考和建议[J].都市快轨交通,2016,29(01):51-54.
[14]刘波,席培胜.某紧邻既有高速公路偏压深基坑开挖效应分析[J].建筑结构,2015,45(06):93-98,88.
[15] Wilk. N,Ye Yong. Field monitoring and analysis of differential settlement of subgrade adjusted by gravel cushion[J]. Journal Of Advanced Transportation,2014(05):9-12.
[16] Fujiwara. Influence of uneven settlement on dynamic characteristics of Ballastless track subgrade[J]. Journal Of Advanced Transportation Engineering,2014(10):17-21.
[17]邱延俊,高毅.高速公路拓宽工程路基沉降控制措施[J].山西建筑,2014,40(08):165-166.
[18]郑传超,韦先林,汪益敏.高速公路扩建工程路面施工对路基沉降的影响[J].公路,2013(08):155-160.
[19]陈民勇,刘宇,陈锐,等.拓宽路基变形的流固耦合数值分析[J].路基工程,2013(04):39-42.