Experimental analysis of soil arching effect in piled embankment
based on granular media

FANG Ying-guang; HOU Ming-xun; GU Ren-guo; FENG De-luan; CHEN Ping

doi:10.16285/j.rsm.2015.S1.010

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Experimental analysis of soil arching effect in piled embankment based on granular media

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- Experimental analysis of soil arching effect in piled embankment based on granular media
- Vol. 36, Issue S1, Pages: 55-60(2015)
- 作者机构：
  
  1. 华南理工大学土木与交通学院,广东,广州,510641
  2. 华南理工大学亚热带建筑科学国家重点试验室,广东,广州,510641
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2015.S1.010
  CLC： TU473
- Online First：14 June 2018，
  
  Published：2015
- 稿件说明：
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FANG Ying-guang, HOU Ming-xun, GU Ren-guo, et al. Experimental analysis of soil arching effect in piled embankment based on granular media[J]. 2015, 36(S1): 55-60.
DOI：

FANG Ying-guang, HOU Ming-xun, GU Ren-guo, et al. Experimental analysis of soil arching effect in piled embankment based on granular media[J]. 2015, 36(S1): 55-60. DOI： 10.16285/j.rsm.2015.S1.010.

摘要

土拱效应的形成和荷载传递机制是进行桩承式路堤中桩土相互作用分析的关键性技术问题。为了探究宏观土拱效应形态的演化过程，借助于传统的光弹试验技术，研制出一种直径为3 mm的聚碳酸酯颗粒，通过自制的加载装置和光测力学图像处理系统，实现了桩承式路堤内部应力分布的可视化，直接观测到模型内部力链网格的产生、分布及变化，求得不同高跨比下桩土应力比变化，并与数值模拟的对比分析。结果表明，随着高跨比的减小，土拱形状由三角形变为半圆形，桩土应力比逐渐减小，当填土高度与桩间距的比值时，可以形成完整的土拱；当时，土拱效应开始消失。

Abstract

The formation of soil arching effect and load transfer mechanism are the key technological problems for analyzing pile-soil interaction in piled embankment. In order to research the evolution process of macroscopic soil arching effect morphology

the photoelastic experiment technology is applied and realizing stress visualization in piled embankment model by using a locally developed loading device and optical measurement mechanics image processing system. The rules of generation

distribution and changes of the force network can be directly observed. Then based on comparatively analyzing the pile-soil stress ratio obtained from experiment and finite element numerical simulation

it is shown that the soil arching shape transforms from triangle to semicircle; and pile-soil stress ratio decreases gradually when reducing the height-span ratio. When the ratio of filling height to pile spacing

is greater than 1

full soil arching is observed; when

the effect of soil arching begins to disappear.

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Related Institution

Institute of Geotechnical Engineering, Yangzhou University

Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University

College of Transportation Engineering, Nanjing University of Technology

China Resources Land (Ningbo) Co., Ltd.

School of Geological Engineering and Surveying, Chang’an University

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