上海地区桩基侧摩阻力与端阻力取值的研究

王卫东; 吴江斌; 王向军; 赵春风; 王建华

上海地区桩基侧摩阻力与端阻力取值的研究 English Version

1. 华东建筑设计研究院有限公司,上海 200002 ； 2. 同济大学土木工程学院,上海 200092 ； 3. 上海交通大学船舶海洋与建筑工程学院,上海 200030

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作者简介:
王卫东 (1969 – ) ,男,辽宁人,工学博士,教授级高级工程师,一级注册结构工程师, 从事高层建筑地基基础、地下工程、深基坑工程的设计与研究。

中图分类号: TU473
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- 收稿日期: 2011-08-02
- 发布日期: 2011-12-06

Values of side and tip resistances of piles in Shanghai area

1. East China Architecture Design & Research Institute Co., Ltd., Shanghai 200002, China; 2. College of Civil Engineering, Tongji University, Shanghai 200092, China; 3. School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai 200030, China

摘要

摘要: 上海市工程建设规范《地基基础设计规范》（ DGJ08 — 11 — 1999 ）中预制桩、灌注桩极限桩侧摩阻力标准值与极限端阻力标准值的取值完全引用上海 89 版规范。但自 20 世纪 90 年代以来,桩基工程在上海地区得到了迅猛的发展,工程实践中桩基载荷试验值与 99 版规范计算值差异较大的情况时有发生,因此结合近年来的工程实测资料对 99 版规范桩基承载力取值进行研究具有重要的工程意义。为此收集了 17 个工程共计 50 根桩身大部分位于淤泥质土中且桩端支承于第 = 5 \* GB3 ⑤ 层相对较软土层的预制桩和 22 个工程共计 66 根分别以⑦,⑧,和⑨ 3 层土为持力层的钻孔灌注桩的实测资料,对 99 版规范桩基承载力取值进行了研究。首先,采用统计分析和有限元数值分析两种方法对收集样本进行了分析,以综合确定预制桩和灌注桩的桩端阻力和桩侧摩阻力取值。其次,按照调整后的承载力取值,对各统计样本进行了回代计算,通过比较表明依据调整后的承载力取值的计算结果具有较高的保证率。
- 桩侧摩阻力 /
- 桩端阻力 /
- 统计分析 /
- 数值分析 /
- 回代计算
Abstract: The values of side and tip resistances of precast and cast-in-place piles of Shanghai 1999 foundation design code (Code-99) completely follow the values of Code-89. However, since the 1990s, pile engineering has had a rapid development in Shanghai area. Many practical projects show that the measured results of the ultimate bearing capacity are different from the computed results by Code-99. So, it is necessary and meaningful to study the values of the side and tip resistances of piles in Shanghai area based on the measured samples. The collected samples contain 50 precast piles from 17 projects, which are mostly located in soft soil and take the layer = 5 \* GB3 ⑤ as the bearing stratum, and 66 cast-in-place piles from 22 projects, which take the layers ⑦, ⑧ and ⑨ as the bearing strata. Firstly, the method of statistical analysis and the finite element method are used to determine the values of side and tip resistances. Secondly, according to the determined values, all samples are back substituted, and the comparisons between the results of the back substitution and the measured results show that the amendment values are reasonable.
- side resistance /
- tip resistance /
- statistical analysis /
- FEM /
- back substitution

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参考文献(12)

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上海地区桩基侧摩阻力与端阻力取值的研究 English Version

作者简介: 王卫东 (1969 – ) ,男,辽宁人,工学博士,教授级高级工程师,一级注册结构工程师, 从事高层建筑地基基础、地下工程、深基坑工程的设计与研究。

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Values of side and tip resistances of piles in Shanghai area

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作者简介:
王卫东 (1969 – ) ,男,辽宁人,工学博士,教授级高级工程师,一级注册结构工程师, 从事高层建筑地基基础、地下工程、深基坑工程的设计与研究。