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首页> 外文期刊>Arabian Journal for Science and Engineering >Comparative Study on the Influence of Pile Length and Diameter on Bearing Capacity and Efficiency of Root Piles, Straight‑Shaft Piles and Pedestal Piles
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Comparative Study on the Influence of Pile Length and Diameter on Bearing Capacity and Efficiency of Root Piles, Straight‑Shaft Piles and Pedestal Piles

机译：桩长和直径对根桩，直轴桩和桩桩承载力影响的比较研究

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摘要

In order to popularize the application of root pile (RP), which is a miniaturized application after the simplified construction procedure of root foundation and a promising new type of noncircular section pile, and to verify the bearing capacity and efficiency advantages of RP over traditional straight-shaft pile and pedestal pile (SP and PP, respectively), on the basis of validation of the numerical model, numerical simulation of the three pile types with different lengths and diameters and root sizes was carried out under vertical (including uplift and compressive) and lateral static loading. The results show that both the vertical and lateral bearing capacities and efficiency of RP are higher than those of SP and PP, and the larger the pile length and diameter are, the greater the advantages are. Specifically, compared with the bearing capacity of SP, vertical capacity could be improved greatly only by RP instead of PP when the pile length is no less than 15 m, and not the enlarged base of PP but the roots arranged on the upside of RP could improve lateral capacity. Besides, increasing pile length could not improve lateral capacity when the pile length is no less than 10 m, and both the vertical and lateral bearing capacities could be improved by increasing pile diameter. Two efficiency comparison methods were put forward, and their application condition, advantage and disadvantage were analysed to compare the efficiency of pile length and diameter in improving capacity, according to which the economic way to improve vertical and lateral capacities is to increase pile length and diameter, respectively. Enlarged base of PP and roots of RP could be played more fully when the displacement is large enough; therefore, the difference of capacity and efficiency of the three pile types with failure criterion of small displacement (10 mm lateral and 30 mm vertical displacement) is smaller than that with large displacement (30 mm lateral and 60 mm vertical displacement). Furthermore, in order to facilitate the application of RP, it is suggested that roots length should not exceed 0.5 times of pile diameter, and the height and width should not greater than the spacing between stirrup bars or main steel bar, respectively. In addition, roots annulus spacing of 0.4 ~ 0.5 m is appropriate, and the spacing of root layers should not be less than 2.4 m. On the whole, it is of great significance to popularize root piles in practice.
机译：为了推广根桩（RP）的应用，这是一种小型化应用后的根基础和有希望的新型非晕型桩，并验证RP在传统直线上的承载力和效率优势 - 轴桩和基座桩（SP和PP）基于数值模型的验证，在垂直（包括隆起和压缩）下进行三个具有不同长度和直径和根尺寸的三种桩类型的数值模拟和横向静载荷。结果表明，垂直和横向承载能力和RP的效率高于SP和PP，桩长和直径越大，优点越大。具体地，与SP的承载力相比，当桩长度不小于15米时，垂直容量可以大大提高，而不是PP，而不是PP的放大底部，但排列在RP的上行轴上的根部提高横向容量。此外，当桩长度不小于10μm时，增加的桩长不能提高横向容量，并且通过增加桩直径可以提高垂直和横向承载能力。提出了两种效率比较方法，分析了它们的应用条件，优势和缺点，以比较桩长度和直径在提高能力上的效率，根据该垂直和横向容量的经济方式增加桩长和直径， 分别。当位移足够大时，可以更充分地播放PP和RP的根部的放大基础;因此，具有小位移（10mm横向和30mm垂直位移）的故障标准的三种桩类型的容量和效率的差异小于大的位移（30mm横向和60mm垂直位移）。此外，为了促进RP的应用，建议根长度不应超过桩直径的0.5倍，并且高度和宽度不应大于马镫杆或主钢筋之间的间隔。另外，0.4〜0.5米的根环间距是合适的，根部层的间距不应小于2.4米。总的来说，在实践中普及根桩具有重要意义。

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  • 来源
    《Arabian Journal for Science and Engineering》 |2021年第11期|10439-10456|共18页
  • 作者

    Junpeng Zhou; Xuefeng Huang; Jun Yuan; Jilu Zhang; Xueming Wang;

  • 作者单位

    Department of Military Installations Army Logistical University of PLA Chongqing 401311 China;

    Department of Military Installations Army Logistical University of PLA Chongqing 401311 China College of Hohai Chongqing Jiaotong University Chongqing 400074 China;

    Northwest Electric Power Design Institute Co. Ltd. of China Power Engineering Consulting Group Xi’an 710075 Shaanxi China;

    School of Civil Engineering Lanzhou University of Technology Lanzhou 730050 Gansu China;

    Northwest Electric Power Design Institute Co. Ltd. of China Power Engineering Consulting Group Xi’an 710075 Shaanxi China;

  • 收录信息 美国《科学引文索引》(SCI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Root pile; Numerical simulation; Pile length and diameter; Bearing capacity; Efficiency;

    机译：根桩;数值模拟;桩长和直径;承载能力;效率;

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