Centrifuge model test study on pile-anchor support system

IF 3.3 2区工程技术 Q2 ENGINEERING, GEOLOGICAL

Soils and Foundations Pub Date : 2025-02-01 DOI:10.1016/j.sandf.2024.101561

Xiaomeng Xue , Ga Zhang

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引用次数: 0

Abstract

With the increasing development of underground engineering, various support systems of foundation pits are emerging, and the pile-anchor support system is widely used in deep foundation pit engineering construction. A series of centrifuge model tests for foundation pit excavation was conducted to investigate the deformation laws of the retaining pile and the soil for pile-anchor support system. Compared with the test results of cantilever pile support system, the horizontal displacement of the retaining pile and the settlement of the retained soil significantly decreased, as well as the deformation mode of the pile and the horizontal and vertical distribution of the deformation of retained soil were different for the pile-anchor support system. The movement of retained soil tended towards the vertical due to the increasing deformation of the entire pile, further leading to the variations of the displacement distributions of the soil. The anchor limited the deflection of the pile and thus resulted in a significant reduction of soil deformation. The direction of tangential relative displacement of the anchor and soil changed during the development of the pile top displacement. Accordingly, the pile-anchor-soil interaction was categorized into three different states, which were affected by inclination angles of the anchor as well. Furthermore, it is concluded that there was an optimal inclination angle of the anchor by comparing the test results of pile-anchor support system with various inclination angles.

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桩锚支护体系离心模型试验研究

随着地下工程的日益发展，各种基坑支护体系不断涌现，桩锚支护体系在深基坑工程建设中得到了广泛的应用。为研究桩锚支护体系中支护桩和土体的变形规律，进行了一系列基坑开挖离心模型试验。与悬臂桩支护体系的试验结果相比，桩锚支护体系的支护桩水平位移和支护土沉降明显减小，桩的变形方式和支护土的水平、竖向变形分布也有所不同。由于全桩变形的增大，土体的运动趋向于竖向，进而导致土体位移分布的变化。锚杆限制了桩的挠度，从而显著降低了土体的变形。在桩顶位移的发展过程中，锚杆与土体的切向相对位移方向发生了变化。据此，将桩-锚-土相互作用分为三种不同的状态，并受锚杆倾角的影响。通过对不同倾角的桩锚支护体系试验结果的比较，得出了存在最优锚杆倾角的结论。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Soils and Foundations 工程技术-地球科学综合

CiteScore

6.40

自引率

8.10%

发文量

审稿时长

5 months

期刊介绍： Soils and Foundations is one of the leading journals in the field of soil mechanics and geotechnical engineering. It is the official journal of the Japanese Geotechnical Society (JGS)., The journal publishes a variety of original research paper, technical reports, technical notes, as well as the state-of-the-art reports upon invitation by the Editor, in the fields of soil and rock mechanics, geotechnical engineering, and environmental geotechnics. Since the publication of Volume 1, No.1 issue in June 1960, Soils and Foundations will celebrate the 60th anniversary in the year of 2020. Soils and Foundations welcomes theoretical as well as practical work associated with the aforementioned field(s). Case studies that describe the original and interdisciplinary work applicable to geotechnical engineering are particularly encouraged. Discussions to each of the published articles are also welcomed in order to provide an avenue in which opinions of peers may be fed back or exchanged. In providing latest expertise on a specific topic, one issue out of six per year on average was allocated to include selected papers from the International Symposia which were held in Japan as well as overseas.