深基坑开挖引起邻近管线破坏分析
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摘要
利用非线性有限元方法计算了深基坑开挖引起的地表沉降量与墙体侧向挠度。采用有厚度的接触面单元模拟土体与支护墙体、土体与地下管线的相互作用,分析了土体与地下管线接触面的应力应变关系,并建立了接触面上的应力应变方程。探讨了地表沉降、墙体侧向挠度对地下管线拉裂破坏的影响。算例分析表明,深基坑开挖对邻近管线破坏极大,因而提出了深基坑支护结构设计时应采取的具体措施。
The ground surface settlement and lateral deflection of retaining wall for deep excavations are calculated using nonlinear finite element method. The interaction of soils and retaining walls, soils and buried pipelines are simulated by an interface element with thickness. The stress and strain equations for the interface are established. The effect of ground settlement and lateral deflection on damage of buried pipelines is studied. Examples show that the damage effect of deep excavations is great, and a method is suggested to resolve the problem in design of retaining structures.
The ground surface settlement and lateral deflection of retaining wall for deep excavations are calculated using nonlinear finite element method. The interaction of soils and retaining walls, soils and buried pipelines are simulated by an interface element with thickness. The stress and strain equations for the interface are established. The effect of ground settlement and lateral deflection on damage of buried pipelines is studied. Examples show that the damage effect of deep excavations is great, and a method is suggested to resolve the problem in design of retaining structures.
引文
[1]段绍伟,沈蒲生.深基坑开挖引起混凝土路面断裂分析[J].工程力学,2004,21(3):40~43. Duan Shaowei, Sheng Pusheng. A crack analysis of concrete road with excavation of deep foundation pits [J]. Engineering Mechanics,2004,21(3):40~43.(in Chinese)
[2] Skempton A W, MacDonald D H. Allowable settement of buildings [J]. Proc. Institution of Civil Engineer,1956,13(6):19~32.
[3] Polshin D E, Tokar R A. Maxmium allowable nonuniform settlement of structure [J]. Proc. Institution of Civil Engineer,1957,5(8):724~784.
[4] Hashash Y M A, Whittle A J. Ground movement prediction for deep excavations in soft clay [J]. Geotech Engrg, ASCE,1996,122(6):85~92.
[5]殷宗泽,朱泓,许国华.土与结构材料接触面的变形及其数学模拟[J].岩土工程学报,1994,16(3):14~22. Yin Zongze, Zhu Hong, Xu Guohua. Numerical simulation of the deformation in the interface between soil and structural material [J]. Chinese Journal of Geotechnical Engineering,1994,16(3):14~22.(in Chinese)
[6]段绍伟,杜飞,沈蒲生.基坑深度、墙体长度、墙体插入深度对高层建筑深基坑开挖变形的影响[J].建筑结构,2002,32(7):27~29. Duan Shaowei, Du Fei, Sheng Pusheng. Effect of the depth of excavation, length and embedded depth of wall on the deformation of excavation of deep foundation pits [J]. Journal of Building Structures,2002,32(7):27~29.(in Chinese)
[7]郑颖人,龚晓南.岩土塑性力学基础[M].北京:中国建筑工业出版社,1989. Zheng Yingren, Gong Xiaonan. Fundamentals of plastic mechanics of soils [M]. Beijing: China Architecture and Building Press,1989.(in Chinese)
[8] Duncan J M, Chang C Y. Nonlinear analysis of stress and strain in soils [J]. J. Soil Mech. And Found. Engrg. Div., ASCE,1970,96(5):1629~1653.
[9]杜飞.高层建筑深基坑开挖数值分析理论及其应用研究[D].长沙:湖南大学,1998. Du Fei. Numerical analysis theory and its application of excavations of deep foundation pits for tall buildings [D]. Changsha: Hunan University,1998.(in Chinese)
[10]秦四清.深基坑工程优化设计[M].北京:地震出版社,1998. Qing Siqing. Optimal design for deep foundation engineering [M]. Beijing: Seismological Press,1998.(in Chinese)
[2] Skempton A W, MacDonald D H. Allowable settement of buildings [J]. Proc. Institution of Civil Engineer,1956,13(6):19~32.
[3] Polshin D E, Tokar R A. Maxmium allowable nonuniform settlement of structure [J]. Proc. Institution of Civil Engineer,1957,5(8):724~784.
[4] Hashash Y M A, Whittle A J. Ground movement prediction for deep excavations in soft clay [J]. Geotech Engrg, ASCE,1996,122(6):85~92.
[5]殷宗泽,朱泓,许国华.土与结构材料接触面的变形及其数学模拟[J].岩土工程学报,1994,16(3):14~22. Yin Zongze, Zhu Hong, Xu Guohua. Numerical simulation of the deformation in the interface between soil and structural material [J]. Chinese Journal of Geotechnical Engineering,1994,16(3):14~22.(in Chinese)
[6]段绍伟,杜飞,沈蒲生.基坑深度、墙体长度、墙体插入深度对高层建筑深基坑开挖变形的影响[J].建筑结构,2002,32(7):27~29. Duan Shaowei, Du Fei, Sheng Pusheng. Effect of the depth of excavation, length and embedded depth of wall on the deformation of excavation of deep foundation pits [J]. Journal of Building Structures,2002,32(7):27~29.(in Chinese)
[7]郑颖人,龚晓南.岩土塑性力学基础[M].北京:中国建筑工业出版社,1989. Zheng Yingren, Gong Xiaonan. Fundamentals of plastic mechanics of soils [M]. Beijing: China Architecture and Building Press,1989.(in Chinese)
[8] Duncan J M, Chang C Y. Nonlinear analysis of stress and strain in soils [J]. J. Soil Mech. And Found. Engrg. Div., ASCE,1970,96(5):1629~1653.
[9]杜飞.高层建筑深基坑开挖数值分析理论及其应用研究[D].长沙:湖南大学,1998. Du Fei. Numerical analysis theory and its application of excavations of deep foundation pits for tall buildings [D]. Changsha: Hunan University,1998.(in Chinese)
[10]秦四清.深基坑工程优化设计[M].北京:地震出版社,1998. Qing Siqing. Optimal design for deep foundation engineering [M]. Beijing: Seismological Press,1998.(in Chinese)
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