【作者】 孙蓉莉；

【导师】 刘云贺； 刘茂社；

【作者基本信息】 西安理工大学 ， 结构工程， 2007， 硕士

【摘要】 多年来，许多学者对于“桩与土的共同作用”问题通过理论分析、试验及观测，取得了一些研究成果。随着城市建设和工业建设的发展，大规模的群桩基础采用较多。掌握群桩基础的工作性能，做到合理设计，具有现实的意义。大量的模型试验和工程实侧均表明，群桩基础的工作性状明显区别于单桩，它受承台、桩、土相互作用的影响。有必要进行更加系统地分析、研究。本文的研究内容是国家自然科学基金《地震作用下大型渡槽桩土动力相互作用及减震机理研究》(批准号：50479026)及陕西省教育厅专项基金《大型渡槽结构抗震分析的关键技术问题研究》(批准号：04JK232)这两个基金研究内容的重要组成部分。以中线穿黄U型渡槽所采用的桩基础作为研究对象，重点进行桩土相互作用的试验研究和大型渡槽桩土动力相互作用理论模型的验证。根据现有试验设备和条件，制定大型渡槽桩土相互作用的静动力试验研究的设计方案及试验技术研究，并予与实施。给出群桩在不同工况及不同长径比的情况下的承载能力、受力特性、以及变形特性。对试验结果进行处理、归纳分析，分析承台、桩、土的相互作用机理，并通过测试数据，探讨了边桩与角桩的不同受力特性。最后根据本文试验结果验证了基金项目前期工作所建立的桩-土相互作用有限元理论模型及相应计算方法和所编程序。两者结果吻合良好，特别是动力分析，这方面的测试结果还未见报道。这样既验证了有限元理论模型的适用性，同时也验证了试验方案的合理性及试验结果的可靠性。这对大型渡槽桩土相互作用的进一步研究和实际工程评估具有一定的参考价值更多还原

【Abstract】 In the past many years, a lot of scholars have got some research results in "the ooperation function of Pile and earth" problem by theoretical analysis, the experiment and observes. With the development of the city and industry construction, the form of large-scale poles has been applied more and more. So grasping the service function of group poles and achieving rational design have the practical significance. A large amount of model experiments and reality easures on project indicate that the properties of large-scale poles foundation are obviously different from the singly one, and it is affected by the interaction of holding platform .pile and earth pole .So it is necessary to do the systematically analysis and studying.The content of this research is that the important ingredient of the Country Natural Science Fund ?the theory study of the interaction of large-scale aqueduct pole -soil driving force and the mechanism damping under the earthquake effect? (approves a number: 50479026) and Shaanxi Province department of education special fund ?the key technology problem studies of large-scale anti-knock aqueduct structure analysis? (approving a number: 04 JK232).In this research, the pole foundation adopted in the yellow U shape aqueduct is regarded as the object of the study. The key of the study is to progress the experiments about the interaction of pile and earth and the theory model verification of the interaction of large-scale aqueduct pole and soil driving force.According to now available test equipment and condition, working out the design scheme of experiments about the interaction of large-scale aqueduct pole and soil coactions tests and experiment technology studying, and put then into effect. And it show the support capability, the forced characteristic property and the deformation characteristic property under the different conditions and different rate of diameter.Finally, it handle and sum up the result of the experiments, analysis the interaction of the hold the platform , the pole and soil and compare the edge pole with angle pole according the testing data of the experiments .Finally, according to the experiments result to confirm the finite element theory model on the interaction of the pole and soil result from the earlier stage project job, reckoning and procedure Both are compatible , especially the dynamic analysis, the testing result about this aspect has not seen news report. It not only confirm the serviceability of the finite element method, but also verify the reliability of the testing scheme and the reliability of the result of the experiments. This comparation has the certain reference value to a further research of the large-scale aqueduct.更多还原