| 存在软弱下卧层的大直径扩底桩桩端承载力的实用算法 |
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| 引用本文： | 阮翔,高广运. 存在软弱下卧层的大直径扩底桩桩端承载力的实用算法[J]. 工业建筑, 2009, 39(7) |
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| 作者姓名： | 阮翔 高广运 |
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| 作者单位： | 同济大学地下建筑与工程系,上海,200092;同济大学岩土及地下工程教育部重点实验室,上海,200092;同济大学地下建筑与工程系,上海,200092;同济大学岩土及地下工程教育部重点实验室,上海,200092 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 基于半无限空间内部点荷载作用下应力分布的Mindlin解答,提出一种确定存在软弱下卧层的大直径扩底桩桩端承载力特征值的实用方法。首先,利用圆形均布荷载作用下的Mindlin解,推求扩底桩桩端底面的附加应力公式。然后根据规范给出的单桩沉降计算公式确定扩底桩的最终沉降计算公式。最后,根据扩底桩沉降的容许值反算桩端底面的附加应力,进而确定扩底桩的端承力。通过工程实例,将计算结果与实测数据进行对比,两者吻合较好。
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| 关 键 词： | 扩底桩 端承力 软弱下卧层 Mindlin解 |
PRACTICAL ALGORITHM FOR THE TIP BEARING CAPACITY OF LARGE DIAMETER BELLED PILE OVER SOFT SUBSTRATUM |
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| Ruan Xiang,Gao Guangyun. PRACTICAL ALGORITHM FOR THE TIP BEARING CAPACITY OF LARGE DIAMETER BELLED PILE OVER SOFT SUBSTRATUM[J]. Industrial Construction, 2009, 39(7) |
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| Authors: | Ruan Xiang Gao Guangyun |
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| Affiliation: | 1;2;1;2;1.Department of Geotechnical Engineering;Tongji University;Shanghai 200092;China;2.Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education;China |
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| Abstract: | It is presented a new method to determine the tip bearing capacity characteristic value of large diameter belled pile on soft substratum according to the settlement.Compared to the presented methods,it is a converse procedure here.First of all,the additional stress corresponding to the settlements is calculated with the settlement formula of single-pile in the code.Then,the tip pressure is obtained by substituting the additional stress into the Mindlin solution for a circular uniform distributed load.At las... |
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| Keywords: | belled pile tip bearing capacity soft substratum Mindlin solution |
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