泡沫混凝土性能及其在台背回填中的应用研究  

Study on the Performance of Foamed Concrete and Its Application in Platform Backfilling

作　　者：郭率军 高颖[1] 朱涵[2] GUO Shuai-jun;GAO Ying;ZHU Han(School of Civil Engineering,Hebei University of Engineering,Handan,Hebei,056038,China;School of Civil Engineering,Tianjin University,Tianjin,300072,China)

机构地区：[1]河北工程大学土木工程学院,河北邯郸056038 [2]天津大学建筑工程学院,天津300072

出　　处：《建材技术与应用》2023年第3期10-14,共5页Research and Application of Building Materials

摘　　要：为了减少公路桥台台背回填病害,拟采用具有轻质和高流动性等的泡沫混凝土进行回填。通过配置不同水灰比的泡沫混凝土,确定其最佳水灰比。结果表明,在水灰比为0.50时泡沫混凝土综合性能最好;使用外方内圆模具测试其抗裂性能,发现随着水灰比的增大开裂时间逐渐缩短。基于室内试验,通过Abaqus进行沉降模拟分析,并与传统砂砾土的沉降模拟进行对比。模拟结果显示,相比于传统砂砾土,泡沫混凝土可以极大地减小台背的沉降变形。In order to reduce the backfill disease of highway bridge abutment,this paper adopts foam concrete with the advantages of light weight and high fluidity to backfill the bridge abutment.Configure foam concrete with different water-cement ratios to determine the best water-cement ratio of foam concrete.The results show that the optimum water-cement ratio is about 0.50,and the comprehensive performance of foamed concrete is the best;the anti-cracking performance of the foamed concrete is tested by using the outer square and inner circular mold,and the cracking time is gradually shortened with the increase of the water-cement ratio;Abaqus conducts settlement simulation analysis and compares it with the settlement simulation of traditional gravel soil.The simulation results show that,compared with the traditional gravel soil,the foamed concrete can greatly reduce the settlement deformation of the platform back.

关 键 词：泡沫混凝土 配合比 力学性能 沉降变形 

分 类 号：U414[交通运输工程—道路与铁道工程]