崩塌落石冲击荷载作用下埋地管道的安全评价
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摘要
野外调查人员在进行崩塌落石灾害的风险分析和评价时,由于没有科学的判别依据,往往只能根据以往经验主观加以判断。本文在前人研究成果和野外调查资料分析的基础上,探讨了崩塌落石冲击力的计算方法,并运用LS-DYNA显式动力学分析软件建立了崩塌落石冲击荷载作用下埋地管道的三维有限元模型,进行了数值模拟,研究了某些因素对埋地管道安全的影响规律,得出一些具有实用性的曲线或公式,可供评价实际问题时查询应用,以为埋地管道的安全运营及崩塌落石的防护设计提供决策依据。
When field investigation personnel investigate the risk analysis and evaluation of the collapse of rockfall disaster,there is no scientific basis for the discrimination,so the conclusion can only be based on the past experience.This paper,on the basis of field data and the results of previous studies,analyzes the calculation methods for rockfall impact,uses the explicit dynamic analysis software LS-DYNA to establish the corresponding three-dimensional finite element model,and carries out the numerical simulation.It also studies the influence law of certain factors on the safety of buried pipelines and makes some practical curves or formula so as to supply practical inquires and provide the decision-making information for the safe operation of buried pipelines and the protection of landslide rockfall.
When field investigation personnel investigate the risk analysis and evaluation of the collapse of rockfall disaster,there is no scientific basis for the discrimination,so the conclusion can only be based on the past experience.This paper,on the basis of field data and the results of previous studies,analyzes the calculation methods for rockfall impact,uses the explicit dynamic analysis software LS-DYNA to establish the corresponding three-dimensional finite element model,and carries out the numerical simulation.It also studies the influence law of certain factors on the safety of buried pipelines and makes some practical curves or formula so as to supply practical inquires and provide the decision-making information for the safe operation of buried pipelines and the protection of landslide rockfall.
引文
[1]邓清禄,荆宏远,刘斌,等.忠县-武汉输气管道忠县-宜昌段试运投产地质灾害调查评价[R].武汉:中国地质大学工程学院,2006:1-2.
[2]邓清禄,易顺华,荆宏远,等.忠县-武汉输气管道张家沟-双河段危岩(047～054)治理工程可行性研究报告[R].武汉:中国地质大学工程学院,2006:1-3.
[3]陈洪凯,唐红梅,叶四桥,等.危岩防治原理[M].北京:地震出版社,2006:151.
[4]Thornton,C.,Z.Ning.A theoretical model for the stick bouncebehavior of adhesive,elastic-plastic spheres[J].Powder Tech-nology,1998,99:157-162.
[5]陈洪凯,唐红梅,王林峰,等.危岩崩塌演化理论及应用[M].北京:科学出版社,2009:160.
[6]杨其新,关宝树.落石冲击力计算的试验研究[J].成都:铁道学报,1996,18(1):101-106.
[7]Kawahara,S.,T.Muro.Effects of dry density and thickness ofsandy soil on impact response due to rockfall[J].Journal ofTerramechanics,2006,43:329-340.
[8]Labiouse,V.,F.Descoeudres,S.Montani.Experimental study ofrock sheds impacted by rock blocks[J].Struct.Eng.Int.,1996,3(1):171-175.
[9]钱家欢.动力固结的理论与实践[J].岩土工程学报,1986,8(6):1-17.
[10]郭见扬.强夯夯锤的冲击力问题(强夯加固机理探讨之一)[J].土工基础,1996,10(2):35-39.
[11]孔令伟,袁建新.强夯的边界接触应力与沉降特性研究[J].岩土工程学报,1998,20(2):86-92.
[12]蒋鹏,李荣强,孔德坊,等.强夯大变形冲击碰撞数值模拟[J].岩土工程学报,2000,22(2):222-226.
[13]水伟厚,高广运,吴延炜,等.湿陷性黄土在强夯作用下的非完全弹性碰撞与冲击应力解析[J].建筑结构学报,2003,24(5):92-97.
[14]白冰.关于夯锤冲击力大小的研究[J].地下空间,2000,20(2):92-95.
[15]叶四桥,陈洪凯,唐红梅,等.落石冲击力计算方法的比较研究[J].水文地质工程地质,2010,37(2):59-64.
[16]叶四桥,陈洪凯,唐红梅,等.落石冲击力计算方法[J].中国铁道科学,2010,31(6):56-62.
[17]荆宏远.落石冲击下浅埋管道动力学响应分析与模拟[D].武汉:中国地质大学,硕士学位论文,2007.
[18]GB50253-2003,输油管道工程设计规范[S].
[2]邓清禄,易顺华,荆宏远,等.忠县-武汉输气管道张家沟-双河段危岩(047～054)治理工程可行性研究报告[R].武汉:中国地质大学工程学院,2006:1-3.
[3]陈洪凯,唐红梅,叶四桥,等.危岩防治原理[M].北京:地震出版社,2006:151.
[4]Thornton,C.,Z.Ning.A theoretical model for the stick bouncebehavior of adhesive,elastic-plastic spheres[J].Powder Tech-nology,1998,99:157-162.
[5]陈洪凯,唐红梅,王林峰,等.危岩崩塌演化理论及应用[M].北京:科学出版社,2009:160.
[6]杨其新,关宝树.落石冲击力计算的试验研究[J].成都:铁道学报,1996,18(1):101-106.
[7]Kawahara,S.,T.Muro.Effects of dry density and thickness ofsandy soil on impact response due to rockfall[J].Journal ofTerramechanics,2006,43:329-340.
[8]Labiouse,V.,F.Descoeudres,S.Montani.Experimental study ofrock sheds impacted by rock blocks[J].Struct.Eng.Int.,1996,3(1):171-175.
[9]钱家欢.动力固结的理论与实践[J].岩土工程学报,1986,8(6):1-17.
[10]郭见扬.强夯夯锤的冲击力问题(强夯加固机理探讨之一)[J].土工基础,1996,10(2):35-39.
[11]孔令伟,袁建新.强夯的边界接触应力与沉降特性研究[J].岩土工程学报,1998,20(2):86-92.
[12]蒋鹏,李荣强,孔德坊,等.强夯大变形冲击碰撞数值模拟[J].岩土工程学报,2000,22(2):222-226.
[13]水伟厚,高广运,吴延炜,等.湿陷性黄土在强夯作用下的非完全弹性碰撞与冲击应力解析[J].建筑结构学报,2003,24(5):92-97.
[14]白冰.关于夯锤冲击力大小的研究[J].地下空间,2000,20(2):92-95.
[15]叶四桥,陈洪凯,唐红梅,等.落石冲击力计算方法的比较研究[J].水文地质工程地质,2010,37(2):59-64.
[16]叶四桥,陈洪凯,唐红梅,等.落石冲击力计算方法[J].中国铁道科学,2010,31(6):56-62.
[17]荆宏远.落石冲击下浅埋管道动力学响应分析与模拟[D].武汉:中国地质大学,硕士学位论文,2007.
[18]GB50253-2003,输油管道工程设计规范[S].
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