上拔和水平联合荷载作用下斜锚锚嵌岩桩承载性能数值研究。

IF 3.9 2区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES
Zilu Xie, Zengzhen Qian, Yiqing Zhang, Qiang Xie, Jun Duan
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引用次数: 0

摘要

斜锚嵌岩桩是为解决山区输电铁塔安装难题而发展起来的一种新型桩锚复合地基。本研究采用非线性数值模型,通过全尺寸现场试验验证了RPIA在升降-水平组合荷载作用下的承载性能。通过参数分析,研究了倾斜锚长度、角度、直径以及连接节点深度对RPIA性能的影响。分析表明,斜锚重构了土岩体内潜在滑面路径,有效扩大了岩土体的参与范围。参数分析表明,斜锚的极限荷载随倾角的增大而减小,随斜锚长度和直径的增大而增大。在岩土体内连接节点的相对位置进一步调节了趋势。较长的斜锚杆将RPIA的破坏模式从短桩的拔出转变为纵向钢筋的屈服,适用于较浅的连接节点,以提高水平阻力。而较短的斜锚则要求锚杆直径和连接点深度的增加。本研究结果为RPIA的设计和推广提供了指导。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Numerical study on bearing performance of rock socketed pile anchored by inclined anchors under uplift and horizontal combined load.

Rock-socketed pile anchored by inclined anchors (RPIA) is a novel pile-anchor composite foundation developed to address the challenges of transmission tower installations in mountainous areas. This study investigates the bearing performance of RPIA under uplift-horizontal combined load using a nonlinear numerical model validated through full-scale field tests. Parametric analyses were conducted to examine the effects of inclined anchor length, angle and diameter, as well as connection node depth, on RPIA performance. Analysis reveals that inclined anchors reconstruct the path of potential slip surfaces within soil and rock mass, thereby effectively expanding the participation range of geotechnical bodies. Parametric analysis demonstrates that ultimate load of RPIA decreases with increasing angle, but increases with larger length and diameter of inclined anchor. The trends are further modulated by the relative position of the connection node within the geotechnical body. Longer inclined anchors shift the failure mode of the RPIA from the pull-out of short pile to the yielding of longitudinal rebar, and are suitable for shallower connection nodes to improve horizontal resistance. While shorter inclined anchors require the increment in anchor diameter and depth of connection point. The results of this study provide guidance for the design and promotion of RPIA.

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来源期刊
Scientific Reports
Scientific Reports Natural Science Disciplines-
CiteScore
7.50
自引率
4.30%
发文量
19567
审稿时长
3.9 months
期刊介绍: We publish original research from all areas of the natural sciences, psychology, medicine and engineering. You can learn more about what we publish by browsing our specific scientific subject areas below or explore Scientific Reports by browsing all articles and collections. Scientific Reports has a 2-year impact factor: 4.380 (2021), and is the 6th most-cited journal in the world, with more than 540,000 citations in 2020 (Clarivate Analytics, 2021). •Engineering Engineering covers all aspects of engineering, technology, and applied science. It plays a crucial role in the development of technologies to address some of the world''s biggest challenges, helping to save lives and improve the way we live. •Physical sciences Physical sciences are those academic disciplines that aim to uncover the underlying laws of nature — often written in the language of mathematics. It is a collective term for areas of study including astronomy, chemistry, materials science and physics. •Earth and environmental sciences Earth and environmental sciences cover all aspects of Earth and planetary science and broadly encompass solid Earth processes, surface and atmospheric dynamics, Earth system history, climate and climate change, marine and freshwater systems, and ecology. It also considers the interactions between humans and these systems. •Biological sciences Biological sciences encompass all the divisions of natural sciences examining various aspects of vital processes. The concept includes anatomy, physiology, cell biology, biochemistry and biophysics, and covers all organisms from microorganisms, animals to plants. •Health sciences The health sciences study health, disease and healthcare. This field of study aims to develop knowledge, interventions and technology for use in healthcare to improve the treatment of patients.
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