地铁车站叠合墙抗渗防裂混凝土配合比优化与应用  

Optimization and Application of Mix Proportion of Anti Seepage and Anti Crack Concrete of Composite Wall of Subway Station

作　　者：郭雅峰 陈士海[1] 杨宗桦 李少波 陈春超 罗小峰 GUO Yafeng;CHEN Shihai;YANG Zonghua;LI Shaobo;CHEN Chunchao;LUO Xiaofeng(College of Civil Engineering,Huaqiao University,Xiamen 361021,China;Xiamen Rail Transit Group,Xiamen 361010,China)

机构地区：[1]华侨大学土木工程学院,福建厦门361021 [2]厦门轨道交通集团,福建厦门361010

出　　处：《华侨大学学报（自然科学版）》2022年第5期587-595,共9页Journal of Huaqiao University(Natural Science)

基　　金：地铁车站深基坑叠合墙结构设计与施工关键技术研究(厦轨道(合)[2020]0851号)。

摘　　要：针对地铁车站叠合墙的开裂渗水问题,为提高混凝土抗渗防裂性能,开展混凝土配合比设计优化.首先,基于混凝土配合比设计规程,对混凝土配合比中多个因素进行正交试验设计法筛选,并对混凝土的粗骨料级配进行优化.然后,选择绝热温升最低的混凝土配合比,掺入混凝土外加剂DHZ复合液,经混凝土和易性试验,确定外加剂最佳掺量,得到混凝土最优配合比.最后,开展混凝土性能试验与地铁车站叠合墙裂缝现场监测分析.结果表明:经配合比优化并掺入DHZ复合液的混凝土能够减少大体积混凝土裂缝的产生,具有良好的抗渗防裂能力.Aiming at the problem of cracking and water seepage of composite wall of subway station,in order to improve the anti seepage and anti crack performance of concrete,the mix proportion design optimization of concrete is carried out.Based on the mix proportion design specification of concrete,several factors in the mix proportion of concrete are screened by orthogonal test design method,and the coarse aggregate gradation of concrete is optimized.The mix proportion of concrete with the lowest adiabatic temperature rise is selected,and the concrete admixture DHZ compound liquid is added,through the concrete workability test,the optimal amount of admixture is determined,and the optimal mix proportion of concrete is obtained.The concrete performance test and the in situ monitoring and analysis of the cracks in the composite wall of the subway station are carried out.The results show that the concrete with optimized mix proportion and DHZ compound liquid can reduce the cracks of mass concrete,and has good anti seepage and anti crack ability.

关 键 词：大体积混凝土 叠合墙内衬墙 地铁车站 抗渗防裂 绝热温升 

分 类 号：U455.452[建筑科学—桥梁与隧道工程] U214.18[交通运输工程—道路与铁道工程]