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板形基础抗冻胀破坏的断裂力学分析 被引量:1

ANALYSIS ON FROST HEAVING OF PLATE FOUNDATION USING FRACTURE MECHANICS METHOD
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摘要 在冻土地区,板形基础被广泛应用,由于冻胀作用对板基础造成各种冻害破坏。基于断裂力学理论,建立了板形基础与地基广义强度破坏的一般准则,提出了板基础抗冻胀破坏分析的新方法,可以对各种板基础的冻胀破坏进行定量分析。应用此准则分别对埋深超过冻深和小于冻深的板基础进行抗冻拔稳定性分析;给出了水池底板的冻胀破坏的强度分析方法。该方法考虑了冻胀力的作用,考虑了冻土自身存在的缺陷,符合冻土实际状态,因此,该分析方法更趋合理。通过工程算例进行抗冻胀破坏分析,结果表明,断裂力学方法是有效的。 Based on fracture mechanics theory, a general failure criterion is set up and a fully new analysis method is given for plate foundation and ground widely used in cold regions. Frost heaving force and flaws of frozen soil are considered in the criterion, and the criterion would be more reasonable and more practical than conventional one. The stability of frost heaving for plate foundations embedded deeper and shallower than freezing-depth are analyzed, and the strength analysis method for failure of bottom plate of water pool is proposed as well. After that, practical samples are analyzed by different methods, from which the validity of the new method is gotten.
出处 《岩石力学与工程学报》 EI CAS CSCD 北大核心 2004年第17期2983-2987,共5页 Chinese Journal of Rock Mechanics and Engineering
基金 国家自然科学基金(50278010)
关键词 土力学 板基础 冻胀破坏 断裂力学分析 soil mechanics, plate foundation, frost heaving failure, analysis based on fracture mechanics
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参考文献5

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同被引文献24

  • 1徐余,刘润.应用断裂强度理论模拟基坑开挖过程及实测数据分析[J].岩石力学与工程学报,2004,23(15):2573-2578. 被引量:5
  • 2张强勇,李术才,陈卫忠.断裂破坏强度模型在大型油库山体边坡支护中的应用[J].岩石力学与工程学报,2004,23(20):3504-3508. 被引量:6
  • 3张振国,丁金粟.粘性土体断裂韧度K_(IC)研究[J].岩土力学,1993,14(3):47-52. 被引量:7
  • 4王俊杰,朱俊高,张辉.关于土石坝心墙水力劈裂研究的一些思考[J].岩石力学与工程学报,2005,24(A02):5664-5668. 被引量:25
  • 5张丙印 于玉贞 张建民.高土石坝的若干关键技术问题[A]..见:中国土木工程学会第九届土力学及岩土工程学术会议论文集[C].北京:清华大学出版社,2003.163-186.
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  • 9Li H S, Yang H T, Liu Z L. Experimental investigation of fracture toughness Klc of frozen soil[J]. Canadian Geotechnical Journal,2000, 37(1): 253-258.
  • 10中华人民共和国国家标准编写组.金属材料平面应变断裂韧度KIC试验方法(GB/T4161-1984)[S].北京:中国标准出版社,1984..

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