| 埕岛粉喷桩复合地基应力比试验 |
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| 引用本文： | 颜庆智,闫相祯,江立群.埕岛粉喷桩复合地基应力比试验[J].中国石油大学学报(自然科学版),2011(6):131-134. |
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| 作者姓名： | 颜庆智 闫相祯 江立群 |
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| 作者单位： | 中国石油大学储运与建筑工程学院;中煤国际重庆分公司; |
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| 摘 要： | 桩土应力比是反映桩体和桩间土协同工作的重要指标,也是复合地基承载力和沉降计算的重要参数,与地基土的物理力学性质密切相关,影响因素复杂。结合某大型工程,首次对埕岛软土上粉喷桩复合地基进行大型应力比试验,得到埕岛粉喷桩复合地基应力比随荷载、时间、褥垫层厚度、褥垫层刚度的变化规律,并进行有限元分析,对两种结果进行对比。结果表明:粉喷桩复合地基桩土应力比值没有时间效应;粉喷桩复合地基桩土应力比与褥垫层厚度负相关,一定厚度褥垫层可协调桩土工作,宜试验确定最佳厚度范围;应力比与褥垫层弹性模量正相关,模量达到某一值时桩土应力比不再变化,应根据桩体材料选用适当弹性模量褥垫材料;该地区粉喷桩复合地基桩土应力比主要分布在6.5～9.0。
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| 关 键 词： | 埕岛软土 粉喷桩复合地基 褥垫层 桩土应力比 承载性能 试验 |
Experiment of pile-soil stress ratio of DJM pile composite foundation in Chengdao |
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| YAN Qing-zhi,YAN Xiang-zhen,JIANG Li-qun.Experiment of pile-soil stress ratio of DJM pile composite foundation in Chengdao[J].Journal of China University of Petroleum,2011(6):131-134. |
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| Authors: | YAN Qing-zhi YAN Xiang-zhen JIANG Li-qun |
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| Institution: | YAN Qing-zhi1,YAN Xiang-zhen1,JIANG Li-qun2 (1.College of Pipeline and Civil Engineering in China University of Petroleum,Qingdao 266555,China,2.China Coal International Chongqing Branch,Chongqing 400016,China) |
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| Abstract: | Pile-soil stress ratio is a very important indicator to reflect the level of the together-work of the pile and soil,also a major parameter calculating bearing capacity of composite foundation and settlement,and it is interrelated with the physical and mechanical properties of the soil,whose influencing factor is also complicated.Combined with a large-scale project,the large stress ratio test to the DJM pile composite foundation in the soft clay of Chengdao was conducted.The regulations of the pile-soil stre... |
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| Keywords: | soft clay of Chengdao DJM pile composite foundation pillow pile-soil stress ratio bearing performance experiment |
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