砂土中群锚锚周土体变形特性模型试验研究

doi:10.16285/j.rsm.2016.S1.031

›› 2016, Vol. 37 ›› Issue (S1): 240-248.doi: 10.16285/j.rsm.2016.S1.031

砂土中群锚锚周土体变形特性模型试验研究

张昕^{1, 2}，乐金朝²，刘汉东¹

1. 华北水利水电大学资源与环境学院，河南郑州 450045；2. 郑州大学水利与环境学院，河南郑州 450001

收稿日期:2015-01-10 出版日期:2016-06-16 发布日期:2018-06-09
通讯作者: 乐金朝，男，1965年生，博士，教授，主要从事土力学试验及理论研究方面的工作。 E-mail:zhangxin@ncwu.edu.cn
作者简介:张昕，女，1977年生，博士，副教授，主要从事土力学与地基基础理论方面的研究工作。
基金资助:
河南省基础与前沿研究计划项目（No.132300410021）。

Experimental study of soil deformation around group anchors in sand

ZHANG Xin^1,2，YUE Jin-chao²，LIU Han-dong¹

1. School of Resources and Environment, North China University of Water Resources and Electric Power, Zhengzhou, Henan 450045, China; 2. School of Water Conservancy and Environment, Zhengzhou University, Zhengzhou, Henan 450001, China

Received:2015-01-10 Online:2016-06-16 Published:2018-06-09
Supported by:
This work was supported by the Basic and Frontier Research Projects of Henan Province(132300410021).

摘要/Abstract

摘要： 群锚是常见的基础形式应用较为广泛，由于群锚之间的相互作用，群锚上拔过程中锚周土体的变形破坏机制比较复杂。采用非接触式数字图像相关方法（DIC）对群锚上拔过程开展模型试验研究，分析了群锚上拔过程中上拔力-位移关系曲线特征和锚周土体变形破坏机制。试验结果表明，密实度和埋深对群锚上拔力-位移关系曲线特征具有显著影响，在相同密实度、相同埋深率下浅埋与深埋群锚与同条件下的单锚具有相似的上拔力-位移关系曲线特征；群锚抗拔承载力具有明显的叠加效应，且砂土密实度、埋深和锚间距等参数因素对群锚效应具有显著影响。通过变形场的研究，得出了砂土密实度、埋深以及锚间距对群锚效应的影响规律。

Abstract: The group anchor，as one of popular foundations, is widely used. The soil deformation mechanism around group anchors when uplifting is sophisticated due to the interaction between anchors. The non-contact digital image correlation(DIC) method is used to perform model tests to study the behavior of group anchors when uplifting. The curve characteristics of uplift force-displacement relationships and soil deformation mechanism around anchors when uplifting are analyzed. The test results show that the relative density and embedment depth have significant influence on force-displacement relationships. Shallow and deep group anchors and single anchor have the similar curve characteristics of force-displacement relationship at the same relative density and embedment depth. Superposition effect is observed for group anchors. The factors such as relative density, embedment ratio and spacing between anchors have significant influence on group efficiency. The degree of influence of relative density, embedment ratio and spacing between anchors on group efficiency are obtained by deformation fields.

Key words: group anchors, digital image correlation(DIC) methods, soil deformation, group efficiency, uplift capacity

中图分类号:

TU 473

张昕，乐金朝，刘汉东,. 砂土中群锚锚周土体变形特性模型试验研究[J]. , 2016, 37(S1): 240-248.

ZHANG Xin，YUE Jin-chao，LIU Han-dong,. Experimental study of soil deformation around group anchors in sand[J]. , 2016, 37(S1): 240-248.

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砂土中群锚锚周土体变形特性模型试验研究

Experimental study of soil deformation around group anchors in sand

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