Experimental study on failure characteristics of pressured under-reamed anchors under horizontal loads

被引：0
|
作者：
Wang Z. [1 ]
Lu K.-Y. [1 ]
Wang Q.-K. [2 ]
Cui H.-S. [1 ]
Ren K. [1 ]
Ma S.-J. [2 ]
Xu S.-F. [1 ]
机构：
[1] College of Civil Engineering and Architecture, Zhejiang University of Technology
来源：
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | 2020年 / 42卷
关键词：
Development mechanism of surrounding soil; Failure characteristic; Horizontal loading; Model test; Pressured under-reamed anchor;
D O I：
10.11779/CJGE2020S1038
中图分类号：
学科分类号：
摘要：
Through a self-developed model test device and PIV technology, the mechanical characteristics of pressured under-reamed anchors under horizontal loads and the development mechanism of the surrounding soil displacement are studied. The test results show that the stress process of the pressured under-reamed anchors can be divided into lateral friction stage, transition stage and end resistance stage, and there will be an "inflection point" in the load-displacement curve between the transitions of each stage. According to the image analysis, it is proposed that the influence range of critical displacement field of soil around the under-reamed anchorage segment of pressured anchor is "bulb-shaped". When the length-diameter ratio of the enlarged head anchoring section exceeds 3:1, the displacement field at the proximal end of the under-reamed anchoring section is basically unaffected with the continuous increase of length-diameter ratio. © 2020, Editorial Office of Chinese Journal of Geotechnical Engineering. All right reserved.
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页码：193 / 197
页数：4
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