半填半挖路基交接面稳定性分析
|
摘要
分析了交接面对半填半挖路基稳定性的影响因素,在总体上将其归纳为几何特征和物理力学参数两类。研究了交接面的台阶特征、填料物理力学参数的差异性,分析了不平衡推力法在条块划分、计算结果误差方面的不足,阐明了不平衡推力法用来分析半填半挖路基交接面的稳定性的缺陷,推荐以改进的Sarma(MSarma)方法替换。以某公路半填半挖路基交接面分析为基础,将正交试验设计方法、统计方法和MSarma方法结合起来,形成了半填半挖路基交接面稳定性力学机制分析方法。采用该法研究了半填半挖路基交接面3种工况条件下各种因素对路基稳定性系数影响的敏感性排序,前4位依次为黏聚力、内摩擦角、交接面和地基倾角。在研究这4个主要参数与稳定性系数量化关系并比较变化趋势的基础上,为填料、交接面参数及路基形式选择提供了指导原则。
The influence factors of the interface on the cut-and-fill roadbed are studied; and reducing these to two kinds as a whole, geometrical features and physico-mechanical parameters. The characteristics of interface step and the discrepancy of the filling physico-mechanical parameters are researched; and it is indicated that there are limitations in the imbalanced thrust method, such as in plotting slices and there is error in the count result. So the author illuminates that the imbalanced thrust method is unsuitable to be used in analyzing the stability of cut-and-fill roadbed basing on interface. And the MSarma method which is developed freshly to replace the imbalanced thrust method is recommended. Based on mass of cut-and-fill roadbed interfaces in a highway and combining the orthogonal design, statistic method and MSarma method, the mechanical mechanism analytical method for analyzing the stability of cut-and-fill roadbed interface is formed. This method is used to analyse the stability of cut-and-fill roadbed interface in three different cases; and the sensitivity priority of each factor to stability coefficient of roadbed is also given; the rank top 4 are cohesive force, internal friction angle, interface and roadbed obliquity; and then the selecting principle of filling, interface parameters and the form of roadbed is advanced, which is based on the study of the quantity relation between the four parameters and stability coefficient and comparing the variety trend.
The influence factors of the interface on the cut-and-fill roadbed are studied; and reducing these to two kinds as a whole, geometrical features and physico-mechanical parameters. The characteristics of interface step and the discrepancy of the filling physico-mechanical parameters are researched; and it is indicated that there are limitations in the imbalanced thrust method, such as in plotting slices and there is error in the count result. So the author illuminates that the imbalanced thrust method is unsuitable to be used in analyzing the stability of cut-and-fill roadbed basing on interface. And the MSarma method which is developed freshly to replace the imbalanced thrust method is recommended. Based on mass of cut-and-fill roadbed interfaces in a highway and combining the orthogonal design, statistic method and MSarma method, the mechanical mechanism analytical method for analyzing the stability of cut-and-fill roadbed interface is formed. This method is used to analyse the stability of cut-and-fill roadbed interface in three different cases; and the sensitivity priority of each factor to stability coefficient of roadbed is also given; the rank top 4 are cohesive force, internal friction angle, interface and roadbed obliquity; and then the selecting principle of filling, interface parameters and the form of roadbed is advanced, which is based on the study of the quantity relation between the four parameters and stability coefficient and comparing the variety trend.
引文
[1]欧阳光前.半挖半填路基边坡稳定性力学机制研究[D].长沙:湖南大学,2007.
[2]周志刚,郑健龙,李强.土工格网处理填挖交界路基非均匀沉降的机制分析[J].岩土工程学报,2002,24(5):576-580ZHOU Zhi-gang,ZHENG Jian-long,LI Qiang.Analysis of the mechanism of using geonets to treat the unequal settlement of subgrade at the cut to fill location[J].Chinese Journal of Geoteehnical Engineering,2002,24(5):576-580
[3]邓卫东,张兴强,陈波,等.路基不均匀沉降对沥青路面受力变形影响的有限元分析[J].中国公路学报,2004,17(1):12-16.DENG Wei-dong,ZHANG Xing-qiang,CHEN Bo,et al.Nonlinear FEM analysis of influence of asphalt pavement under non-homogenous settlement of roadbed[J].China Journal of Highway and Transport,2004,17(1):12-16.
[4]苗英豪,胡长顺,王秉刚.路基填挖交界处路面裂缝的三维有限元分析[J].交通运输工程学报,2005,5(4):43-48.MIAO Ying-hao,HU Chang-shun,WANG bin-gang.3D FEM analysis of pavement crack at cut to fill location of subgrade[J].Journal of Traffic and Transportation Engineering,2005,5(4):43-48.
[5]蒋鑫,邱延峻.半填半挖式路基差异沉降对沥青路面结构影响分析[J].水文地质工程地质,2006,(4):16-20.JIANG Xin,QIU Yan-jun.The influences of the asphalt pavement deformation due to the diferential subgrade settlement[J].Hydrology and Engineering Geology,2006,(4):16-20.
[6]时卫民,郑颖人,唐伯明,等.边坡稳定不平衡推力法的精度分析及其使用条件[J].岩土工程学报,2004,26(3):313-318.SHI Wei-min,ZHENG Ying-ren,TANG Bo-ming,et al.Accuracy and application range of imbalance thrust force method for slope stabil ity analysis[J].Chinese Journal of Geotechnical Engineering,2004,26(3):313-318.
[7]郑颖人,时卫民,杨明成.不平衡推力法与Sarma法的讨论[J].岩石力学与工程学报,2004,23(17):3030-3036.ZHENG Ying-ren,SHI Wei-min,YANG Ming-cheng.Discussion on imbalance thrust force method and Sarma’s method[J].Chinese Journal of Rock Mechanics and Engineerin,2004,23(17):3030-3036.
[8]姚爱军,苏永华.复杂岩质边坡锚固工程地震敏感性分析[J].土木工程学报,2003,23(11):34-37.YAO Ai-jun,SU Yong-hua.A method for stability of slope engineering with comlicated rock-rass[J].China Civil Engineering Journal,2003,23(11):34-37.
[9]苏永华,赵明华,邹志鹏,等.边坡稳定性分析的MSarma模式及其可靠度计算方法[J].水利学报,2006,37(4):457-463.SU Yong-hua,ZHAO Ming-hua,ZOU Zhi-peng.Sarma model for slope stability analysis and its reliability degree calculation method[J].Journal of Hydraulic Eng-ineering,2006,37(4):457-463.
[10]许桂生.基于正交试验和复合单元法的排水孔优化设计[J].岩土力学,2007,28(7):1435-1438.XU Gui-sheng.Optimization design of drainage holes based on orthogonal experiments and composite element method[J].Rock and Soil Mechanics,2007,28(7):1435-1438.
[11]丁洲祥,龚晓南,朱合华,等.Biot固结有限元方程组的病态规律分析[J].岩土力学,2007,28(2):269-273.DING Zhou-xiang,GONG Xiao-nan,ZHU He-hua,et al.Study on ill-conditioned problems of Biot’s consolidation finite element equations[J].Rock and Soil Mechanics,2007,28(2):269-273.
[2]周志刚,郑健龙,李强.土工格网处理填挖交界路基非均匀沉降的机制分析[J].岩土工程学报,2002,24(5):576-580ZHOU Zhi-gang,ZHENG Jian-long,LI Qiang.Analysis of the mechanism of using geonets to treat the unequal settlement of subgrade at the cut to fill location[J].Chinese Journal of Geoteehnical Engineering,2002,24(5):576-580
[3]邓卫东,张兴强,陈波,等.路基不均匀沉降对沥青路面受力变形影响的有限元分析[J].中国公路学报,2004,17(1):12-16.DENG Wei-dong,ZHANG Xing-qiang,CHEN Bo,et al.Nonlinear FEM analysis of influence of asphalt pavement under non-homogenous settlement of roadbed[J].China Journal of Highway and Transport,2004,17(1):12-16.
[4]苗英豪,胡长顺,王秉刚.路基填挖交界处路面裂缝的三维有限元分析[J].交通运输工程学报,2005,5(4):43-48.MIAO Ying-hao,HU Chang-shun,WANG bin-gang.3D FEM analysis of pavement crack at cut to fill location of subgrade[J].Journal of Traffic and Transportation Engineering,2005,5(4):43-48.
[5]蒋鑫,邱延峻.半填半挖式路基差异沉降对沥青路面结构影响分析[J].水文地质工程地质,2006,(4):16-20.JIANG Xin,QIU Yan-jun.The influences of the asphalt pavement deformation due to the diferential subgrade settlement[J].Hydrology and Engineering Geology,2006,(4):16-20.
[6]时卫民,郑颖人,唐伯明,等.边坡稳定不平衡推力法的精度分析及其使用条件[J].岩土工程学报,2004,26(3):313-318.SHI Wei-min,ZHENG Ying-ren,TANG Bo-ming,et al.Accuracy and application range of imbalance thrust force method for slope stabil ity analysis[J].Chinese Journal of Geotechnical Engineering,2004,26(3):313-318.
[7]郑颖人,时卫民,杨明成.不平衡推力法与Sarma法的讨论[J].岩石力学与工程学报,2004,23(17):3030-3036.ZHENG Ying-ren,SHI Wei-min,YANG Ming-cheng.Discussion on imbalance thrust force method and Sarma’s method[J].Chinese Journal of Rock Mechanics and Engineerin,2004,23(17):3030-3036.
[8]姚爱军,苏永华.复杂岩质边坡锚固工程地震敏感性分析[J].土木工程学报,2003,23(11):34-37.YAO Ai-jun,SU Yong-hua.A method for stability of slope engineering with comlicated rock-rass[J].China Civil Engineering Journal,2003,23(11):34-37.
[9]苏永华,赵明华,邹志鹏,等.边坡稳定性分析的MSarma模式及其可靠度计算方法[J].水利学报,2006,37(4):457-463.SU Yong-hua,ZHAO Ming-hua,ZOU Zhi-peng.Sarma model for slope stability analysis and its reliability degree calculation method[J].Journal of Hydraulic Eng-ineering,2006,37(4):457-463.
[10]许桂生.基于正交试验和复合单元法的排水孔优化设计[J].岩土力学,2007,28(7):1435-1438.XU Gui-sheng.Optimization design of drainage holes based on orthogonal experiments and composite element method[J].Rock and Soil Mechanics,2007,28(7):1435-1438.
[11]丁洲祥,龚晓南,朱合华,等.Biot固结有限元方程组的病态规律分析[J].岩土力学,2007,28(2):269-273.DING Zhou-xiang,GONG Xiao-nan,ZHU He-hua,et al.Study on ill-conditioned problems of Biot’s consolidation finite element equations[J].Rock and Soil Mechanics,2007,28(2):269-273.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心