顺层岩质边坡隧道开挖稳定性数值模拟
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摘要
以尖峰岭隧道作为典型工程实例,根据地质勘查成果选择典型断面布置合理的测孔进行监测.通过对监测数据进行分析,提出随着隧道的开挖,边坡稳定性一定会受到影响,边坡含水状态是影响其稳定性的主要因素,要加强边坡防治措施.利用midmas-gts软件对隧道开挖过程进行数值模拟,分析了隧道开挖导致的位移和应变的变化规律,结果表明:开挖后的位移变化和应变变化比未开挖时要显著增大,隧道洞口段是引起崩塌、裂缝破坏的主要地段之一,故洞口段边坡的稳定性是隧道设计和施工时必须认真考虑和对待的问题.
This study took Jiafengling tunnel as the typical study case.According to the geological exploration results,this paper chose the typical sections to layout the rational measuring holes for monitoring.The monitoring data were analyzed and put forward that the slope stability was affected with the tunnel excavation and the slope water state is the main factors of the slope stability.Numerical simulation for tunnel excavation was carried out by using MIDAS-GTS software,the tunnel excavation in displacement and strain change rules was analyzed,and the result shows that the excavation of the displacement and strain change is significantly more than that of not excavation,and tunnel portal section is the most important one of the area of collapse and crack failure,therefore,the tunnel portal stability is the critical problem in tunnel design and construction.
This study took Jiafengling tunnel as the typical study case.According to the geological exploration results,this paper chose the typical sections to layout the rational measuring holes for monitoring.The monitoring data were analyzed and put forward that the slope stability was affected with the tunnel excavation and the slope water state is the main factors of the slope stability.Numerical simulation for tunnel excavation was carried out by using MIDAS-GTS software,the tunnel excavation in displacement and strain change rules was analyzed,and the result shows that the excavation of the displacement and strain change is significantly more than that of not excavation,and tunnel portal section is the most important one of the area of collapse and crack failure,therefore,the tunnel portal stability is the critical problem in tunnel design and construction.
引文
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[11]孙书伟,朱本珍,张忠平.顺层高边坡开挖松动区的数值模拟研究[J].铁道学报,2008,30(5):74-79.Sun Shuwei,Zhu Benzhen,Zhang Zhongping.Study on the DisturbedZone of A Cut Bedding High Rock Slope by Numerical Simulation[J].Journal of the China Railway Society,2008,30(5):74-79.
[12]贾金青,王海涛,宓荣三.隧道洞口滑坡稳定性分析及滑坡治理[J].辽宁工程技术大学学报:自然科学版,2009,28(5):736-738.Jia Jingqing,Wang Haitao,Mi Rongsan.Landslide stability analysisand control at portal of tunnel[J].Journal of Liaoning TechnicalUniversity:Natural Science,2009,28(5):736-738.
[13]刘洪波.抗滑桩处治山体滑坡施工工艺[J].山西交通科技,2004,1(增):73-74.Liu Hongbo.The Construction Technology of Anti-Slide Pile TreatingMountainous Landslide[J].Shan Xi Science and Technology ofCommunications,2004,1(S):73-74.
[2]冯文凯,石豫川.缓倾角层状高边坡变形破坏机制物理模拟研究[J].中国公路学报,2004,17(2):32-36.Feng Wenkai,Shi Yuchuan.Study of mechanism of deformation failureof a low-angle bedded high slope with physical simulation method[J].China Journal of Highway and Transport,2004,17(2):32-36.
[3]孙书伟,朱本珍,马惠民,等.典型顺层高边坡工程病害的地质力学模型试验研究[J].岩土工程学报,2008,30(9):1349-1355.Sun Shuwei,Zhu Benzhen,Ma Huimin,et al.Geomechanical model testson slope hazards of typical high bedding rock slopes[J].Chinese Journalof Geotechnica l Engineering,2008,30(9):1 349-1 355.
[4]赵青,黄质宏,唐晓玲.顺层状岩质边坡的数值模拟分析[J].贵州工业大学学报:自然科学版,2007,36(5):59-64.Zhao Qing,Huang Zhihong,Tang Xiaoling.Simulation of BeddingStratified Rock-mass Slope[J].Journal of GuiZhou University ofTechnology:Natural Science,2007,36(5):59-64.
[5]龚文惠,王平,陈峰,等.顺层岩质路堑边坡稳定性的敏感性因素分析[J].岩土力学,2007,28(4):812-816.Gong Wenhui,Wang Ping,Chen Feng,et al.Analysis of sensitivity factorsto stability of bedding rock cutting slope[J].Rock and Soil Mechanics,2007,28(4):812-816.
[6]李忠,杜明辉.西康线东岭黄土坡山体滑坡的防治措施[J].辽宁工程技术大学学报:自然科学版,2005,24(2):196-198.Li Zhong,Du Minghui.Stability of trench slope in Huangtupo Xikangrailway line[J].Journal of Liaoning Technical University:NaturalScience,2005,24(2):196-198.
[7]李维光,楼建国.降雨条件下顺层滑坡影响因素和稳定性分析[J].采矿与安全工程学报,2006,23(4):498-501.Li Weiguang,Lou Jianguo.Analysis of affecting factors of along-bedlandslide of rock mass and its stability under a rainfall condition[J].Journal of Mining and Safety Engineering,2006,23(4):498-501.
[8]李维光,张继春.地震作用下顺层岩质边坡稳定性的拟静力分析[J].山地学报,2007,25(2):184-199.Li Weiguang,Zhang Jichun.Equivalent static stability study on rockmass bedding slope under blasting[J].Journal of Mountain Science,2007,25(2):184-199.
[9]郭学彬,张继春,刘泉,等.爆破振动对顺层岩质边坡稳定性的影响[J].矿业研究与开发,2006,26(2):77-80.Guo Xuebin,Zhang Jichun,Liu Quan,et al.Influence of blasting Vibrationon stability of bedding rock slope[J].Mining Research and Development,2006,26(2):77-80.
[10]王佳权.缓倾状顺层岩石边坡冰胀作用失稳初探[J].贵州水力发电,2009,23(3):32-35.Wang Jiaquan.Instability Exploration of gently dipping layered rockslope ice bulge function[J].GuiZhou Water Power,2009,23(3):32-35.
[11]孙书伟,朱本珍,张忠平.顺层高边坡开挖松动区的数值模拟研究[J].铁道学报,2008,30(5):74-79.Sun Shuwei,Zhu Benzhen,Zhang Zhongping.Study on the DisturbedZone of A Cut Bedding High Rock Slope by Numerical Simulation[J].Journal of the China Railway Society,2008,30(5):74-79.
[12]贾金青,王海涛,宓荣三.隧道洞口滑坡稳定性分析及滑坡治理[J].辽宁工程技术大学学报:自然科学版,2009,28(5):736-738.Jia Jingqing,Wang Haitao,Mi Rongsan.Landslide stability analysisand control at portal of tunnel[J].Journal of Liaoning TechnicalUniversity:Natural Science,2009,28(5):736-738.
[13]刘洪波.抗滑桩处治山体滑坡施工工艺[J].山西交通科技,2004,1(增):73-74.Liu Hongbo.The Construction Technology of Anti-Slide Pile TreatingMountainous Landslide[J].Shan Xi Science and Technology ofCommunications,2004,1(S):73-74.
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