降雨作用下浅埋隧道松散围岩塌方机制
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摘要
为揭示降雨作用下浅埋隧道松散围岩塌方机制,基于突变理论,建立浅埋隧道塌方的尖点突变模型.考虑不同本构关系的隧道围岩组合,分别推导双层应变软化介质、单层应变硬化介质及应变软化介质组合的围岩失稳力学判据,分析诱发塌方的主要影响因素,揭示雨水入渗作用下浅埋隧道塌方机理.以马鞍山隧道为工程案例,运用地表沉降监测数据进行浅埋隧道塌方突变预测.研究表明,浅埋隧道塌方力学判据可有效用于塌方机制分析,用地表沉降数据预测浅埋隧道松散围岩塌方更为合理和符合实际.
In order to reveal collapse mechanism in loose wall rock of shallow tunnel under rainfall,the cusp-catastrophic model is established based on catastrophe theory.Considering the case that surrounding rock of shallow tunnel is combined with different rock and soil mass,the instability criterions are derived when surrounding rock is combined with double strain-softening mediums or with single strain-hardening layer and strain-softening layer.The main influence factors and mechanism of collapse are analyzed.Then,the viewpoint is put forward that collapse of shallow tunnel can be predicted by data of ground settlement based on the catastrophe theory.It's feasibility and reasonability is tested by the collapse that occurs in construction of Maanshan tunnel.The results show that the derived instability criterions can analyze the collapse mechanism effectively.It is more feasible and tally with the actual that the data of ground settlement is used to predict the collapse in loose wall rock of shallow tunnel.
In order to reveal collapse mechanism in loose wall rock of shallow tunnel under rainfall,the cusp-catastrophic model is established based on catastrophe theory.Considering the case that surrounding rock of shallow tunnel is combined with different rock and soil mass,the instability criterions are derived when surrounding rock is combined with double strain-softening mediums or with single strain-hardening layer and strain-softening layer.The main influence factors and mechanism of collapse are analyzed.Then,the viewpoint is put forward that collapse of shallow tunnel can be predicted by data of ground settlement based on the catastrophe theory.It's feasibility and reasonability is tested by the collapse that occurs in construction of Maanshan tunnel.The results show that the derived instability criterions can analyze the collapse mechanism effectively.It is more feasible and tally with the actual that the data of ground settlement is used to predict the collapse in loose wall rock of shallow tunnel.
引文
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[13]许建聪.隧道围岩-初支系统灰色突变失稳预测模型研究[J].岩石力学与工程学报,2008,27(6):1181-1187.
[14]刘贵应,刘新喜,魏新颜.隧道塌方的尖点突变模型及应用[J].地质灾害与环境保护,2002,13(2):14-16,26.
[15]ALESSO H P.Elementary catastrophe theory modelingof duffing's equation for seismic excitation of nuclearpower facilities[J].Nuclear Engineering and Design,1979,52(1):145-155.
[16]LIU Dingwen,WANG Jingyao,WANG Yongjuan.Ap-plication of catastrophe theory in earthquake hazard as-sessment and earthquake prediction research[J].Tec-tonophysics,1989,167(2):179-186.
[17]徐曾和,徐小荷.考虑围岩流变特性的地震尖点型突变模型[J].岩土力学,2000,21(1):24-27.
[18]YIN Youquan,DU Jing.A swallow-tail type catastroph-ic model of earthquake process[J].Acta SeismologicaSinica,1994,7(4):521-528.
[19]何平,赵子都.突变理论及其应用[M].大连:大连理工大学出版社,1989.
[20]王迎超.山岭隧道塌方机制及防灾方法[D].杭州:浙江大学建筑工程学院,2010.
[21]傅鹤林,彭思甜,韩汝才,等.岩土工程数值分析新方法[M].长沙:中南大学出版社,2006.
[22]秦四清,王思敬,孙强,等.非线性岩土力学基础[M].北京:地质出版社,2008.
[23]黄俊,张顶立.软土隧道拱顶与地表沉降关系研究[J].北京交通大学学报,2005,29(1):36-40.
[2]QIN Si-qing,WANG Si-jing.A cusp catastrophe modelof instability of slip-buckling slope[J].Rock Mechan-ics and Rock Engineering,2001,34(2):119-134.
[3]许建聪,尚岳全,郑束宁,等.强降雨作用下浅层滑坡尖点突变模型研究[J].浙江大学学报:工学版,2005,39(11):1676-1679.
[4]MIAO T D.Landslide analysis and prediction by catas-trophe theory[J].Proc 5th International Symposium onLandslides,Lausanne,1988,26(3/4):731-733.
[5]QIN Siqing,JIAO J J,WANG Sijing,et al.A nonlinearcatastrophe model of instability of planar-slip slope andchaotic dynamical mechanisms of its evolutionary process[J].International Journal of Solids and Structures,2001,38(44/45):8093-8109.
[6]费鸿禄,徐小荷,唐春安.地下硐室岩爆的突变理论研究[J].煤炭学报,1995,20(1):29-33.
[7]PAN Yue,LI Aiwu,QI Yunsong.Fold catastrophemodel of dynamic pillar failure in asymmetric mining[J].Mining Science and Technology,2009,19(1):49-57.
[8]ZHANG Tianjun,REN Shuxin,LI Shugang,et al.Ap-plication of the catastrophe progression method in predic-ting coal and gas outburst[J].Mining Science andTechnology,2009,19(4):430-434.
[9]闫长斌,徐国元.基于突变理论深埋硬岩隧道的失稳分析[J].工程地质学报,2006,14(4):508-512.
[10]刘春,易俊,姜德义,等.深埋隧道围岩突变失稳风险预测[J].中国矿业,2008,17(3):93-95.
[11]王心飞,王文广,刘新荣,等.隧道围岩失稳的突变理论分析[J].地下空间与工程学报,2008,4(3):425-430.
[12]YAN Changbin,XU Guoyuan,ZUO Yujun.Destabili-zation analysis of overlapping underground chambers in-duced by blasting vibration with catastrophe theory[J].Transactions of Nonferrous Metals Society of China,2006,16(3):735-740.
[13]许建聪.隧道围岩-初支系统灰色突变失稳预测模型研究[J].岩石力学与工程学报,2008,27(6):1181-1187.
[14]刘贵应,刘新喜,魏新颜.隧道塌方的尖点突变模型及应用[J].地质灾害与环境保护,2002,13(2):14-16,26.
[15]ALESSO H P.Elementary catastrophe theory modelingof duffing's equation for seismic excitation of nuclearpower facilities[J].Nuclear Engineering and Design,1979,52(1):145-155.
[16]LIU Dingwen,WANG Jingyao,WANG Yongjuan.Ap-plication of catastrophe theory in earthquake hazard as-sessment and earthquake prediction research[J].Tec-tonophysics,1989,167(2):179-186.
[17]徐曾和,徐小荷.考虑围岩流变特性的地震尖点型突变模型[J].岩土力学,2000,21(1):24-27.
[18]YIN Youquan,DU Jing.A swallow-tail type catastroph-ic model of earthquake process[J].Acta SeismologicaSinica,1994,7(4):521-528.
[19]何平,赵子都.突变理论及其应用[M].大连:大连理工大学出版社,1989.
[20]王迎超.山岭隧道塌方机制及防灾方法[D].杭州:浙江大学建筑工程学院,2010.
[21]傅鹤林,彭思甜,韩汝才,等.岩土工程数值分析新方法[M].长沙:中南大学出版社,2006.
[22]秦四清,王思敬,孙强,等.非线性岩土力学基础[M].北京:地质出版社,2008.
[23]黄俊,张顶立.软土隧道拱顶与地表沉降关系研究[J].北京交通大学学报,2005,29(1):36-40.
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