载荷试验中锚桩的抗拔特性分析研究

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• 英文论文题名：Analysis on the Pull-out behavior of anchor piles in the field loading test
• 论文作者：聂庆科 ; 贾向新 ; 梁书奇 ; 王英辉
• 英文论文作者：Nie Qingke ; Jia Xiangxin ; Liang shuqi ; Wang Yinghui ; Hebei Research Institute of Construction and Geotechnical Investigation Co.Ltd. ; The Technology Center of Geotechnical Engineering of Hebei Province
• 年：2016
• 作者机构：河北建设勘察研究院有限公司;河北省岩土工程技术研究中心;
• 论文关键词：锚桩 ; 抗拔特性 ; 载荷试验
• 英文论文关键词：anchor pile ; pull-out behavior ; loading test
• 会议召开时间：2016-09-05
• 会议录名称：2016年全国工程勘察学术大会论文集（上册）
• 英文会议录名称：Geotechnical Investigation & Surveying
• 语种：中文
• 分类号：TU473.1
• 学会代码：ZJKC
• 会议名称：2016年全国工程勘察学术大会
• 会议地点：中国山西太原
• 主办单位：全国建筑工程勘察科技情报网、全国建筑工程勘察科技情报网华北情报站、中国建筑学会工程勘察分会
• 学会名称：中国建筑学会工程勘察分会
• 页数：8
• 文件大小：411k
• 原文格式：O
• 会议级别：全国

摘要

对粉土地基中刚性桩复合地基现场载荷试验中的锚桩的受力性状进行了测试,载荷试验包括对单桩、单桩复合地基和多桩复合地基三种情况。测试结果表明,锚桩桩身抗拔力的影响深度随外部荷载的增大而不断增大,但所施加的外部荷载主要由桩体上部的抗拔摩阻力来提供;当桩体超过一定深度后,桩侧的抗拔摩阻力开始明显减小,抗拔作用减弱;在卸荷初期,抗拔轴力分布特征与加荷过程类似,但当荷载卸荷至较小值时,桩身抗拔轴力分布特征出现较大差异,特别是在桩顶,抗拔摩轴力很快减小甚至出现明显的压缩轴力。
The pull-out behavior of anchor piles in the field loading test of composite foundation are measured,the loading tests include single pile,single-pile composite foundation,and several piles composite foundation.The tests show that the affecting depth of the anchor piles increase with the increase of the applied loading,and the external force loadings are mainly provided by the upper part of the anchor piles.When the length of a pile is greater than a definite length,the friction force in the side of the anchor pile begins to decrease obviously;and thus the anchor application also decreases.The distribution characteristics of anchor piles at unloading beginning are similar to those of loading.However,when the external loading value is decreased to be smaller under unloading,the differences in the distribution characteristics of tensile force are very apparent.Especially in the upper part of the anchor piles,the tensile forces are decreased rapidly and even take up a compressive force.

引文

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