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抗滑桩宽度与桩间距对桩间土拱效应的影响研究
  • ISSN号:1000-4548
  • 期刊名称:《岩土工程学报》
  • 时间:0
  • 分类:U213.1[交通运输工程—道路与铁道工程]
  • 作者机构:[1]西南交通大学土木工程学院,四川成都610031, [2]四川省交通厅,四川成都610041
  • 相关基金:国家自然科学基金西部重点资助项目(90202007);《西攀高速公路地质灾害研究与对策》科研项目资助
中文摘要:

抗滑桩宽度对桩间土拱效应的影响直接关系到桩截面尺寸及桩间距设计的合理性。通过离心模型试验,观察到抗滑桩宽度越大,桩间土拱稳定性越高。基于离心试验模型,采用数值模拟方法分析桩间土拱承载能力随桩宽度的变化规律。试验表明在桩间净距保持不变的情况下,桩间土拱承载能力随桩宽度增加而逐渐增大,但增长斜率逐渐变缓,说明随着桩宽度的变大,桩宽度的增加对桩间土拱承载能力的影响越来越小;而在桩间净距与桩宽度比值不变的情况下,桩间土拱承载能力随桩宽度和桩间净距的增加反而降低,且下降斜率逐渐增大,说明桩间净距对桩间土拱承载能力起着控制作用,增加桩宽度对土拱承载能力的贡献远不及增加桩间净距对土拱承载能力的削弱作用。本文研究表明,桩间土拱承载能力与桩宽度之间存在非线性的关系,在建立抗滑桩合理桩间距计算模型时应对此予以考虑。

英文摘要:

The effect of width of anti-slide piles on soil arching between piles directly related to the rationality of design of the section and the space of piles. By the centrifuge model tests, the phenomenon was observed that the larger the width of piles was, the more stable of the soil arching was. Based on the centrifuge model, the numerical simulation method was adopted to analyze the relationship between the bearing capacity of soil arching and the width of piles. It was indicated that if the space between piles was constant the beating capacity of soil arching gradually increased with the increase of width of piles, but the increasing velocity gradually became slow. It was illuminated that the effect of the width of piles on the beating capacity of soil arching vanished with the increasing of pile width. If the ratio between the space and the width of piles was constant, the bearing capacity of soil arching descended when the width and the space of piles increased, and the descending gradient gradually increased. It was indicated that the space between piles acted as the dominator to bearing capacity of soil arching, so the contribution of increasing the width of piles for the beating capacity of soil arching was far less than the weakening effect due to increasing the space between piles. It was indicated that the relationship between the beating capacity of soil arching and the width of piles was non-linear, and it should be considered when the numerical model of reasonable pile space was established.

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期刊信息
  • 《岩土工程学报》
  • 中国科技核心期刊
  • 主管单位:中国科协
  • 主办单位:中国水利学会 中国土木工程学会 中国力学学会 中国建筑学会 中国水力发电工程学会 中国振动工程学会
  • 主编:蔡正银
  • 地址:南京虎踞关34号
  • 邮编:210024
  • 邮箱:ge@nhri.cn
  • 电话:025-85829553 85829534
  • 国际标准刊号:ISSN:1000-4548
  • 国内统一刊号:ISSN:32-1124/TU
  • 邮发代号:28-62
  • 获奖情况:
  • 中国科协二等奖,江苏省首届优秀期刊奖,连续三次被评为核心期刊
  • 国内外数据库收录:
  • 美国化学文摘(网络版),荷兰文摘与引文数据库,美国工程索引,美国剑桥科学文摘,日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊(2004版),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),中国北大核心期刊(2000版)
  • 被引量:54826