强夯作用下土体动力特性研究
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摘要
讨论了用于计算土体动力压密有限元方程的建立及其数值计算方法,给出了山西化肥厂场地动力压密的数值解,得出了相应的应力场、位移场、加速度场等,计算结果与实测结果吻合较好。采用了新的分析模型研究了强夯后土体的振动特性,同弹性模型、理想弹塑性模型进行了比较,两个工程实例的计算结果表明,提出的新模型更加优越。
The establishment of finite element equation and the numerical analysis in dynamic compaction of soil are discussed. The numerical solution of dynamic compaction in the site of Shanxi Fertilizer Factory is given. The stress-field, deformation-field, acceleration-field, density-field of the foundation soil during and after dynamic consolidation (DC) are investigated and compared with practical figures. The calculation results are close to the test data. A new model is proposed and adopted to analyze the vibration characteristics of soil after DC. Two practical projects are studied and the results are compared with those of elastic model and ideal elastoplastic model. The model is shown to have great advantage in the analysis of the vibration characteristics of soil after DC.
The establishment of finite element equation and the numerical analysis in dynamic compaction of soil are discussed. The numerical solution of dynamic compaction in the site of Shanxi Fertilizer Factory is given. The stress-field, deformation-field, acceleration-field, density-field of the foundation soil during and after dynamic consolidation (DC) are investigated and compared with practical figures. The calculation results are close to the test data. A new model is proposed and adopted to analyze the vibration characteristics of soil after DC. Two practical projects are studied and the results are compared with those of elastic model and ideal elastoplastic model. The model is shown to have great advantage in the analysis of the vibration characteristics of soil after DC.
引文
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[9]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.Kong Lingwei,Yuan Jianxin.Study on surface contact stress and settlement properties during dynamic consolidation[J].Chinese Journal of Geotechnical Engineering,1998,20(2):86~92.(in Chinese)
[10]钱家欢.土工原理与计算(第二版)[M].北京:中国水利水电出版社,1996.Qian Jiahuan.Soil engineering principle and calculation(2th edition)[M].Beijing:China Water Conservancy and Hydropower Press,1996.(in Chinese)
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[12]牛志荣.复合地基处理及其工程实例[M].北京:中国建材工业出版社,2000.Niu Zhirong.Composite foundation treatments and engineering examples[M].Beijing:China Construction Material Industry Press,2000.(in Chinese)
[2]Bandel H.Dynamic stresses in soil caused by falling weights[C].Proc.9th International Conferences on Soil Mechanics and Foundation Engineering,1977,2.187~194.
[3]阎明礼.地基处理技术[M].北京:中国环境科学出版社,1996.Yan Mingli.Technology of ground treatment[M].Beijing:China Press of the Environmental Science,1996.(in Chinese)
[4]尚世佐.强夯加固饱和软粘土的几个问题探讨[J].建筑结构学报,1983,(2):55~69.Shang Shizuo.Some aspects on the treatment of saturated soft clay by dynamic consolidation[J].Journal of Building Structures,1983,(2):55~69.
[5]钱家欢,钱学德,赵维炳,帅方生.动力固结的理论与实践[J].岩土工程学报,1986,8(6):1~17.Qian Jiahuan,Qian Xuede,Zhao Weibing,Shuai fangsheng.Theory and practice of dynamic consolidation[J].Chinese Journal of Geotechnical Engineering,1986,8(6):1~17.(in Chinese)
[6]吴铭炳,王钟琦.强夯机理的数值分析[J].工程勘察,1989,(3):1~5.Wu Mingbing,Wang Zhongqi.The numerical analysis of the dynamic consolidation mechanisms[J].Engineering Reconnaissance,1989,(3):1~5.(in Chinese)
[7]廖振鹏.局部透射边界的精度[J].地震工程与工程振动,1993,13(3):1~6.Liao Zhenpeng.Accuracies of local transmitting boundaries[J].Earthquake Engineering and Engineering Vibration,1993,13(3):1~6.(in Chinese)
[8]孔令伟,袁建新.强夯作用下成层地基的表面接触应力分布特征[J].力学学报,1999,31(2):250~256.Kong Lingwei,Yuan Jianxin.Study on surface contact stress distribution properties for multi-layered foundation during dynamic consolidation[J].Acta Mechanica Sinica,1999,31(2):250~256.(in Chinese)
[9]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.Kong Lingwei,Yuan Jianxin.Study on surface contact stress and settlement properties during dynamic consolidation[J].Chinese Journal of Geotechnical Engineering,1998,20(2):86~92.(in Chinese)
[10]钱家欢.土工原理与计算(第二版)[M].北京:中国水利水电出版社,1996.Qian Jiahuan.Soil engineering principle and calculation(2th edition)[M].Beijing:China Water Conservancy and Hydropower Press,1996.(in Chinese)
[11]杨桂通.土动力学[M].北京:中国建材工业出版社,2000.Yang Guitong.Soil dynamics[M].Beijing:China Construction Material Industry Press,2000.(in Chinese)
[12]牛志荣.复合地基处理及其工程实例[M].北京:中国建材工业出版社,2000.Niu Zhirong.Composite foundation treatments and engineering examples[M].Beijing:China Construction Material Industry Press,2000.(in Chinese)
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