| 考虑下卧层特性的复合地基荷载传递规律模型试验研究 |
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| 引用本文： | 亓乐,刘薇,孙长帅,张勇.考虑下卧层特性的复合地基荷载传递规律模型试验研究[J].岩土力学,2012,33(Z1):123-128. |
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| 作者姓名： | 亓乐 刘薇 孙长帅 张勇 |
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| 作者单位： | 1. 山东电力工程咨询院有限公司，济南 210013；2. 山东省水文水资源勘测局，济南 210013 |
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| 摘 要： | 为研究存在下卧层复合地基的荷载传递规律，进行多组复合地基室内模型试验。针对不同桩径、垫层厚度和下卧层厚度等工况进行试验，得到增大桩径不能提高桩体的承载力发挥度；复合地基的设计要充分考虑垫层和下卧层对荷载传递的影响一系列有益的结论。试验结果表明，复合地基中桩身轴力、桩侧摩阻力和荷载分担比的分布及发展过程，可为复合地基理论研究提供一定的依据，并对其设计起到一定的指导作用。
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| 关 键 词： | 复合地基 下卧层 模型试验 荷载传递规律 |
| 收稿时间： | 2012-02-16 |
Model test research on load transfer mechanism of composite ground considering underlying layer features |
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| QI Le,LIU Wei,SUN Chang-shuai,ZHANG Yong.Model test research on load transfer mechanism of composite ground considering underlying layer features[J].Rock and Soil Mechanics,2012,33(Z1):123-128. |
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| Authors: | QI Le LIU Wei SUN Chang-shuai ZHANG Yong |
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| Institution: | 1.Shandong Electric Power Engineering Consulting Institute, Jinan 250013, China； 2. Shandong Hydrology and Water Resources Survey Bureau, Jinan 250013, China |
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| Abstract: | In order to research the load transfer mechanism of composite ground with underlying layer,a series of model tests were performed.The tests were of various pile diameters,cushion thicknesses and underlying layer thicknesses.Increasing the diameter of pile can not improve the exerting degree of pile bearing capacity,and the cushion and underlying layer should be considered fully in the composite ground design.Test results show the distribution of axial forces,skin friction and pile-soil load shareing ratio,and provide useful information for the study on the composite foundation theory,and give a guide to its engineering design. |
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| Keywords: | composite ground underlying layer model test load transfer mechanism |
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