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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

36卷

期数:

2019年06期

页码:

46-54

栏目:

出版日期:

2019-11-25

文章信息/Info

Title:

Study on Mechanical Properties of Anchored Retaining Wall Based on Indoor Model Test

文章编号:

1673-2049(2019)06-0046-09

作者:

张宏博^1,2,陈 奇^1,2,孙玉海³,孟庆宇^1,2,于 瀚^1,2,宋修广^1,2

(1. 山东大学 土建与水利学院,山东 济南 250061; 2. 山东大学 山东省路基安全工程技术研究中心,山东 济南 250061; 3. 山东省交通规划设计院,山东 济南 250014)

Author(s):

ZHANG Hong-bo^1,2, CHEN Qi^1,2, SUN Yu-hai³, MENG Qing-yu^1,2, YU Han^1,2, SONG Xiu-guang^1,2

(1. School of Civil Engineering, Shandong University, Jinan 250061, Shandong, China; 2. Shandong Engineering & Technology Research Center for Subgrade Safety, Jinan 250061, Shandong, China; 3. Shandong Province Communications Planing and Design Institute, Shandong University, Jinan 250014, Shandong, China)

关键词:

锚拉式挡土墙;  土压力;  假性黏聚力;  预应力;  竖向荷载

Keywords:

anchored retaining wall;  soil pressure;  pseudo cohesive force;  prestress;  vertical load

分类号:

U411

DOI:

-

文献标志码:

A

摘要:

为了研究锚拉式挡土墙在非极限状态下土压力分布及墙体位移变化规律,从力学角度分析了锚拉式挡土墙的作用机理,并基于加筋原理揭示了设置锚杆具有提高墙背土体强度的作用。设计制作了室内模型试验装置,开展了一系列不同预应力水平、不同竖向荷载及二者耦合作用的室内试验。通过分析试验数据,得到了不同影响因素下的土压力合力变化规律及合力作用点位置。结果表明:锚拉式挡土墙由于锚杆的侧向约束作用,墙背土压力峰值出现在锚杆位置处; 分级施加竖向荷载,墙身呈现底部位移略大的平动模式(T模式)外倾; 分级施加锚杆预应力,墙身呈现底部位移略大的向外平动位移模式(T模式); 二者耦合作用下,墙体呈平动叠加绕墙底转动模式(T+RB模式)内倾,但位移量较小; 墙背土压力在预应力、竖向荷载及二者耦合作用下均介于静止土压力与被动土压力之间; 所得结论对工程实践具有指导意义。

Abstract:

In order to study the distribution of soil pressure and wall displacement of anchored retaining wall in non-limit state, the mechanism of anchor retaining wall was analyzed from the view of mechanics. Based on the principle of reinforcement, it was explained that the setting of anchor bolt increased the strength of wall back soil. The indoor model test equipment was designed and a series of laboratory tests with different prestress levels, different vertical loads and their coupling effects were carried out. By analyzing the test data, the variation law of soil pressure resultant and the position of resultant point were obtained. The results show that the anchored retaining wall is affected by lateral restraint of bolt and the peak pressure of the wall back soil appears at the position of anchor. The wall body presents a translational mode(T mode)with a slightly larger displacement at the bottom under applying vertical loads in stages. The wall presents a lateral displacement mode(T mode)with a slightly large bottom displacement. When they are coupled, the wall body presents tilting inward in the translational superposition rotating mode around the wall(T+RB mode), but the displacement is small. The pressure on the wall back soil is between the static soil pressure and the passive soil pressure under the prestress, vertical load and their coupling action and the stress peak value. The research results are of guiding significance to engineering practice.

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相似文献/References:

[1]屈俊童,吴绍山,许展峰,等.考虑土拱效应的斜插式桩板墙合理板间距研究[J].建筑科学与工程学报,2018,35(06):111.
　QU Jun-tong,WU Shao-shan,XU Zhan-feng,et al.Study on Reasonable Plate Spacing of Oblique Sheet-pile Wall Considering Soil Arching Effect[J].Journal of Architecture and Civil Engineering,2018,35(06):111.

备注/Memo

备注/Memo:

收稿日期:2019-02-17
基金项目:国家自然科学基金项目(51208284); 山东省科技发展计划项目(2013GSF11603)
作者简介:张宏博(1977-),男,山东济宁人,副教授,工学博士,E-mail:zhanghongbo@sdu.edu.cn。

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更新日期/Last Update: 2019-11-26