粤赣高速公路k2边坡监测与稳定性研究
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摘要
2005年6月下旬广东河源地区遭遇百年一遇的强降雨袭击,累积降雨量超过1000mm。强降雨诱发了边坡的非稳定变形。基于加卸载响应比理论,分析了粤赣高速公路k2路堑高边坡的内、外部变形及加固结构的响应比,讨论了边坡的变形及其稳定性。采用有限元法计算了降雨后支护和不支护两种工况的边坡变形,对k2边坡的加固效果进行了科学评价。研究表明:边坡在强降雨条件下支护后的边坡变形速率趋于稳定,k2边坡加固能够满足稳定性设计要求。
A storm attacked the Heyuan area late June,2005.The rainfall exceeded 1 000 mm.The storm triggered the unstable deformation of the k2 slope.Based on the Load/Unload Response Ratio theory,the deformation and stability of the slope are discussed by analyzing the response ratio of inner deformation,outer deformation and the reinforced structure of k2 high cut slope.The slope deformations on support and without support structure under the storm are analyzed by using finite element method,and the effect of the slope reinforced structure is assessed.The deformation ratio of the slope trends stable under the storm after reinforcement.k2 slope reinforcement can be met the stability of design standards.
A storm attacked the Heyuan area late June,2005.The rainfall exceeded 1 000 mm.The storm triggered the unstable deformation of the k2 slope.Based on the Load/Unload Response Ratio theory,the deformation and stability of the slope are discussed by analyzing the response ratio of inner deformation,outer deformation and the reinforced structure of k2 high cut slope.The slope deformations on support and without support structure under the storm are analyzed by using finite element method,and the effect of the slope reinforced structure is assessed.The deformation ratio of the slope trends stable under the storm after reinforcement.k2 slope reinforcement can be met the stability of design standards.
引文
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[4]赵明阶,何光春,王多垠,等.边坡工程处治技术[M].北京:人民交通出版社,1999.
[5]FINLAY P J,ROBIN FELL.Landslides risk perception and acceptance[J].Canadian Geotechnical Journal,1997,34(2):169-188
[6]GINXBURG L K.Effectiveness of anti landslide retaining structures[C]//Proceedings of the seventh international symposium on Landslides,[S.l.]:[s.n.],1996.
[7]D’ANDREA R A.Safety factors for probabilistic slope design[J].Journal of the Geotechnical Engineering Division,American Society of Civil Engineering,1992,108(9):1108-1118.
[8]王恭先.滑坡灾害及其防治技术[R].兰州:铁道部科学研究院西北分院,1998:69-78.
[9]孙广忠.论地质灾害防治[J].中国地质灾害与防治学报,1996,7(1):1-5.SUN Guang-zhong.Discussion on geological hazard[J].The Chinese Journal of Ggeological Hazard Control,1996,7(1):1-5.
[10]张倬元.滑坡防治工程的现状与发展展望[J].地质灾害与环境保护,2000,11(2):1-9.ZHANG Zhuo-yuan.The present status technical advance and development trends of landslide remedial measures[J].Journal of Geological Hazard and Environment Preservation,2000,11(2):1-9.
[11]尹祥础.地震预测新途径的探索[J].中国地震,1987,3(1):1-7.YIN Xiang-chu.Study for a new approach to earthquake prediction[J].Earthquake Research in China,1987,3(1):1-7.
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