基于渐进均匀化方法的土工格室加筋地基沉降计算与分析
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摘要
土工格室作为一种三维加筋材料已广泛应用于土木、港口等多领域,土工格室加筋地基也随之得到了广泛的应用。由于地基结构在受荷载作用后会产生应力、应变、位移,为保证地基质量,对地基沉降值进行计算与分析是十分必要的。采用渐进均匀化方法计算土工格室加筋层各组分等效弹性模量等力学参数,表明土工格室加筋层是一种横观各向同性的负泊松比材料。利用所得的力学参数建立格室不同埋深时的参考试验地基模型,进行数值模拟,结果表明格室埋深影响地基沉降值,埋深越大,地基沉降值越大。
As a three-dimensional reinforced material, geocell has been widely used in many engineering projects such as residential and industrial buildings, highways and ports.Under the external loading, the geocell reinforced soils will subject to stress and will induce settlement. It is necessary to analysis the performance of the geocell reinforced soils and to estimate the foundation settlement value to ensure the project quality. The equivalent elastic modulus and other mechanical parameters of the geocell-reinforcement are analyzed by the asymptotic homogenization method. The results indicate that the geocell-reinforcement is an isotropic negative Poisson's ratio material in the transverse and longitudinal directions.Using the asymptotic homogenization method derived mechanical parameters for the settlement analysis of the reinforced soils with different geocell embedment. Both the numerical analysis and the field test results demonstrated that deeper geocell embedment would induce larger settlement.
As a three-dimensional reinforced material, geocell has been widely used in many engineering projects such as residential and industrial buildings, highways and ports.Under the external loading, the geocell reinforced soils will subject to stress and will induce settlement. It is necessary to analysis the performance of the geocell reinforced soils and to estimate the foundation settlement value to ensure the project quality. The equivalent elastic modulus and other mechanical parameters of the geocell-reinforcement are analyzed by the asymptotic homogenization method. The results indicate that the geocell-reinforcement is an isotropic negative Poisson's ratio material in the transverse and longitudinal directions.Using the asymptotic homogenization method derived mechanical parameters for the settlement analysis of the reinforced soils with different geocell embedment. Both the numerical analysis and the field test results demonstrated that deeper geocell embedment would induce larger settlement.
引文
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[5] LESHCHINSKY B, LING H. Effects of geocell confinement on strength and deformation behavior of gravel[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2012,139(2):340-352.
[6] 印长俊.周期性复合材料等效模量计算软件(2012SR113371)[R].中国,2012.
[7] 印长俊,肖鹏,屈畅姿.用渐进均匀化方法分析混凝土的弹性常数[C].北京:中国力学大会,2017.
[8] LAKES R, WOJCIECHOWSKI K W. Negative compressibility, negative Poisson's ratio and stability[J]. Physica Status Solidi, 2008,245(3):545-551.
[2] 俞钟泉,李少青.土工织物加固堤基的离心模型试验[J].岩土工程学报,1989(4).
[3] GZALATKAY I. Calculation method for settlement of horizontally reinforced sub. In:3rd Int Conf on Geotextiles[M]. Austria, 1986:255-260.
[4] SANCHEZ-PALENCIA E. Non-homogenous media and vibration theory[M]. Lecture Notes in Physics, 1980.
[5] LESHCHINSKY B, LING H. Effects of geocell confinement on strength and deformation behavior of gravel[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2012,139(2):340-352.
[6] 印长俊.周期性复合材料等效模量计算软件(2012SR113371)[R].中国,2012.
[7] 印长俊,肖鹏,屈畅姿.用渐进均匀化方法分析混凝土的弹性常数[C].北京:中国力学大会,2017.
[8] LAKES R, WOJCIECHOWSKI K W. Negative compressibility, negative Poisson's ratio and stability[J]. Physica Status Solidi, 2008,245(3):545-551.