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基于变形协调的斜桩轴向承载力计算方法
  • ISSN号:1001-7445
  • 期刊名称:《广西大学学报:自然科学版》
  • 时间:0
  • 分类:TU473.1[建筑科学—结构工程;建筑科学—土工工程]
  • 作者机构:[1]福州大学土木工程学院,福建福州350108, [2]同济大学桥梁工程系,上海200092
  • 相关基金:国家自然科学基金资助项目(41272299)
中文摘要:

为进一步研究斜桩轴向承载力计算方法,基于斜桩的桩周摩阻力不均匀分布的特性和桩一土受力变形协调的原则,推导了斜桩轴向承载力计算公式,通过对比本文公式与规范公式的计算结果,揭示了桩身倾角、桩径、桩长和桩侧极限摩阻力等因素对斜桩轴向容许承载力的影响规律。结果表明:鉴于规范公式未考虑斜桩桩身倾角对承载力的影响,本文公式计算得到的单桩轴向承载力随着桩身倾角的增加逐渐降低;对于不同桩径,本文公式计算值均比规范公式计算值小,但两者相差7%以内;桩长或桩侧极限摩阻力较小时,规范公式得出的承载力数值要比本文公式小,但随着桩长或桩侧极限摩阻力的增大,本文公式得出的承载力逐渐大于规范公式。本文建立的轴向承载力计算公式考虑了桩身倾角与桩~土受力变形相互协调的影响,可为斜桩轴向承载力计算提供参考。

英文摘要:

In order to obtain the axial bearing capacity of a batter pile, the calculation formula for the axially bearing capacity of a batter pile was deduced based on the non-uniform distribution char- acteristics of the friction resistance around the batter pile shaft and the mechanism of pile-soil deformation compatibility. The results calculated by the proposed formula and the method given by the design code of pile were compared to explore the influence of the factors, such as pile inclina- tion, diameter, length and utmost friction resistance around pile shaft, on axial bearing capacity. The calculated results showed that the value of the pile axially bearing capacity calculated by the proposed formula decreased with the increase of pile inclination. For different pile diameters, the pile axially bearing capacity was 7% smaller than that calculated by the code's formula. The shorter of the pile length or the lesser of the utmost friction resistance of the pile was, the smaller bearing capacity calculated by the code's formula was than the values calculated by the proposed formula. Finally, with the increase of the pile length or utmost friction resistance, the value of 'bearing capaci- ty calculated by this proposed formula was greater than the value calculated by the code's formula. The proposed formula also takes into account of the influence of pile inclination and the mechanismof pile-soil deformation compatibility. It can be a reference to calculate axial bearing capacity of bat- ter piles.

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期刊信息
  • 《广西大学学报:自然科学版》
  • 中国科技核心期刊
  • 主管单位:广西大学
  • 主办单位:广西大学
  • 主编:陈保善
  • 地址:广西南宁市大学路100号广西大学西校区
  • 邮编:530005
  • 邮箱:gxuzrb@gxu.edu.cn
  • 电话:0771-3235713 3232390
  • 国际标准刊号:ISSN:1001-7445
  • 国内统一刊号:ISSN:45-1071/N
  • 邮发代号:
  • 获奖情况:
  • 全国高校自然科学优秀学报,广西优秀科技期刊
  • 国内外数据库收录:
  • 俄罗斯文摘杂志,美国化学文摘(网络版),德国数学文摘,美国剑桥科学文摘,中国中国科技核心期刊,中国北大核心期刊(2008版),中国北大核心期刊(2011版),中国北大核心期刊(2014版)
  • 被引量:9092