CALCULATION FOR PILE-SOIL STRESS RATIO OF TWO-DIRECTION REINFORCED COMPOSITE FOUNDATION
CALCULATION FOR PILE-SOIL STRESS RATIO OF TWO-DIRECTION REINFORCED COMPOSITE FOUNDATION
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发表时间：
2009
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影响因子：
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通讯作者：
Zhao Ming-hua
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作者：
Zhao Ming-hua
针对竖向增强体-水平增强体-桩间土的整体相互作用特点，将水平向加筋垫层视为具有一定刚度的板，竖向桩体及桩间土简化为刚度不同的弹簧系列。以单桩圆柱体及其影响区土体为典型单元，对双向加筋复合地基进行了分析。以Winkler地基上的圆形薄板为基础，推导了水平加筋垫层的挠度函数，并推导了复合地基桩土应力比的计算公式。最后给出了一个算例进行了计算和分析。系统地考虑了路堤荷载、残余沉降、面积置换率、桩土刚度比等主要影响因素。研究了桩土应力比的变化规律。分析结果与试验结果吻合较好。
According with characteristics of interactions of vertical piles, horizontal reinforced mattress and soil, the horizontal reinforced mattress was supposed to be a thin plate, while vertical piles and soils were simplified as spring series with different rigidities respectively. A cylinder composed of a single pile and soils located in its influence area were regarded as the typical element to analyze the two-direction reinforced composite foundation. A function of the horizontal reinforced mattress deflection was deduced based on a circular thin plate on Winkler foundation, and the formula of the pile-soil stress ratio of the composite foundation was also deduced. Finally, an example was given for calculation and analysis. The main influence factors including the embankment loads, residual settlement, area replacement ratio and stiffness ratio of pile and soil are considered systemically. The change rules of pile-soil stress ratio are also investigated. The analysis result shows the good agreement with the test result.