基于Hewlett方法的桩承式加筋路堤桩土应力比改进

doi:10.16046/j.cnki.issn2096-5680.2023.03.011

河北水利电力学院学报 ›› 2023, Vol. 33 ›› Issue (3): 65-72.DOI: 10.16046/j.cnki.issn2096-5680.2023.03.011

基于Hewlett方法的桩承式加筋路堤桩土应力比改进

张玉琳¹, 姜海军^2,3, 张培成^2,3, 周亦涛^1,2, 姚垣州³

1.河北建筑工程学院土木工程学院,河北省张家口市朝阳西大街13号 075000;
2.河北省岩土工程安全与变形控制重点实验室(河北水利电力学院),河北省沧州市黄河西路49号 061001;
3.河北水利电力学院交通工程系,河北省沧州市黄河西路49号 061001

收稿日期:2023-02-28 修回日期:2023-03-01 出版日期:2023-09-30 发布日期:2023-10-26
通讯作者: 周亦涛(1978-),男,四川达州人,教授,硕士生导师,主要从事加筋土结构、复合地基、土力学等研究工作。E-mail:zhouytwr@163.com
作者简介:张玉琳(1998-),女,四川广安人,硕士研究生,主要从事加筋土结构研究工作。E-mail:517837144@qq.com
基金资助:
沧州市科技计划项目(204108004),河北水利电力学院科研计划项目(SYKY2101),河北省岩土工程安全与变形控制重点实验室(河北水利电力学院)开放课题(HWEKF202103),2021年河北省大学生创新创业训练计划项目(202110085004)

Improvement on Pile-soil Stress Ratio of Pile-supported and Geosynthetics-reinforced Embankment Based on Hewlett Method

ZHANG Yu-lin¹, JIANG Hai-jun^2,3, ZHANG Pei-Cheng^2,3, ZHOU Yi-tao^1,2, YAO Yuan-zhou³

1. School of Civil Engineering, Hebei University of Architecture, 075000, Zhangjiakou, Hebei, China;
2. Hebei Key Laboratory of Geotechnical Engineering Safety and Deformation Control, Hebei University of Water Resources and Electric Engineering, 061001, Cangzhou, Hebei, China;
3. Department of Traffic Engineering, Hebei University of Water Resources and Electric Engineering, 061001, Cangzhou, Hebei, China

Received:2023-02-28 Revised:2023-03-01 Online:2023-09-30 Published:2023-10-26

摘要/Abstract

摘要： 文中改进了拉膜效应对计算桩承式加筋路堤桩土应力比产生的影响,提出了新的计算方法。主要通过桩间加筋体的微分段静力平衡,然后,根据加筋体下的地基反力符合Winkler弹性地基模型的假定,耦合拉膜效应和加筋体上覆路堤的土拱效应可求得桩土差异沉降量以及网下桩土应力比。此外文中还分析了多种相关因素对桩土应力比的影响,也通过实例分析证明了该方法的可行性。结果表明:网下桩土应力比随土工格栅抗拉强度和填土高度的增加而增加,随桩间距的增加而减小,网上桩土应力比则反之;布桩形式不同,桩土应力比将随之改变,梅花形布桩时桩土应力比最大。该计算方法得到的桩土应力比计算值与实测值更加接近。

关键词: 桩承式加筋路堤, 桩土应力比, Hewlett方法, Winkler弹性地基模型

Abstract: The influence of tensioned membrane effect on the calculation of pile-soil stress ratio of pile-supported and geosynthetics-reinforced embankment is improved, and a new calculation method is proposed. Primarily via static equilibrium equations of infinitesimal section of geogrid between the piles, according to the assumption that the reaction on foundation below the geogrid fit Winkler foundation model, and coupling membrane effect and soil arching effect of fill above the geogrid, the pile-soil stress ratios below the reinforcement net and differential settlement between piles and soil in the pile-supported reinforced embankment are obtained. In addition, this paper also analyzes the influence on the pile-soil stress ratio of various related factors, and proves the feasibility of this method through practical projects. The results show that the pile-soil stress ratios below the reinforcement net will increase with the increase of the tensile strength of geo-grids and the height of fill, and decrease with the increase of pile spacing, while the pile-soil stress ratios above the reinforcement net are the complete opposite of the former. The pile-soil stress ratio will change with different forms of placing pile, and the maximum stress ratio is obtained when arrange piles in the quincunxes. The calculated values of the pile-soil stress ratios is much closer to the measured ones.

Key words: pile-supported and geosynthetics-reinforced embankment, pile-soil stress ratio, Hewlett method, Winkler elastic foundation-based mode

中图分类号:

张玉琳, 姜海军, 张培成, 周亦涛, 姚垣州. 基于Hewlett方法的桩承式加筋路堤桩土应力比改进[J]. 河北水利电力学院学报, 2023, 33(3): 65-72.

ZHANG Yu-lin, JIANG Hai-jun, ZHANG Pei-Cheng, ZHOU Yi-tao, YAO Yuan-zhou. Improvement on Pile-soil Stress Ratio of Pile-supported and Geosynthetics-reinforced Embankment Based on Hewlett Method[J]. Journal of Hebei University of Water Resources and Electric Engineering, 2023, 33(3): 65-72.

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基于Hewlett方法的桩承式加筋路堤桩土应力比改进

Improvement on Pile-soil Stress Ratio of Pile-supported and Geosynthetics-reinforced Embankment Based on Hewlett Method

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