抗拔锚杆在超高挡土墙中的加筋作用研究  

Reinforcement of Anti-pulling Bolts in Ultra-high Gravity Retaining Wall

作　　者：徐书平 汪紫璇 柯芊芊 陈律 涂耀 程杰林 Xu Shuping;Wang Zixuan;Ke Qianqian;Chen Lyu;Tu Yao;Cheng Jielin(School of Civil Engineering and Architecture,Wuhan Polytechnic University,Wuhan 430023,Hubei,China;Wuhan Zhenghong Rock and Soil Engineering Co.,Ltd.,Wuhan 430000,Hubei,China;Wuhan Xindi Geotechnical Engineering Technology Co.,Ltd.,Wuhan,430040,Hubei,China)

机构地区：[1]武汉轻工大学土木工程与建筑学院,湖北武汉430023 [2]武汉正洪岩土工程有限公司,湖北武汉430000 [3]武汉鑫地岩土工程技术有限公司,湖北武汉430040

出　　处：《岩土工程技术》2024年第2期156-162,共7页Geotechnical Engineering Technique

基　　金：湖北省住建厅2020年度科技计划项目(202018)。

摘　　要：通过在超高挡土墙中安装水平抗拔锚杆和抗滑块,从而降低挡土墙的截面积。这种加筋方式可以有效地减轻主动土压力。当布置不同形式的抗拔锚杆和抗滑块时,墙后土体应力分布产生大幅的影响,对其水平应力和水平位移进行了数值分析。根据某工程实际情况,计算得出挡土墙背部土体在不同工况下的水平方向应力和位移大小,以验证其安全性,达到减少土体压力的目的。结果表明,在超高挡土墙中,采用3层抗拔锚杆和每层抗拔锚杆上安装2个抗滑块的加筋方式,对挡土墙墙后土体的预加固,增加墙后土体的自身稳定性,削减墙后土体对挡墙的土压力,可以获得最佳的加筋效果。By installing horizontal anti-pulling bolts and anti-sliders in ultra-high retaining walls,the cross-sectional area of the retaining wall can be reduced.This reinforcement method can effectively reduce the active earth pressure.When different forms of antipulling bolts and anti-sliders were arranged,the stress distribution of soil behind the wall had a large impact,and the horizontal stress and horizontal displacement were numerically analyzed.According to the actual situation,the horizontal stress and displacement of the soil behind the gravity retaining wall under different working conditions were calculated to verify its safety and achieve the purpose of reducing the soil pressure.The results show that in the ultra-high gravity retaining wall,the best reinforcement effect can be obtained by using 3 layers of anti-pulling bolts and 2 anti-sliders on each layer of anti-pulling bolts.The pre-reinforcement of the soil behind the retaining wall should increase the stability of the soil behind the wall,and reduce the soil pressure of the soil behind the wall to the retaining wall.

关 键 词：挡土墙 抗拔锚杆 抗滑块 预加固 数值模拟 

分 类 号：TU433[建筑科学—岩土工程]