注浆加固砖砌体的受压性能试验研究  

Experimental study on compressive behavior of brick masonry strengthened by grouting

作　　者：陈大川[1] 苏豪 梁建国[2] 常科龙 王高峰 CHEN Dachuan;SU Hao;LIANG Jianguo;CHANG Kelong;WANG Gaofeng(College of Civil Engineering,Hunan University,Changsha 410082,China;College of Civil Engineering,Changsha University of Science and Technology,Changsha 410114,China;Hunan Daxing Reinforcement and Reconstruction Engineering Co.,Ltd.,Changsha 410006,China;China Construction Fifth Engineering Bureau Co.,Ltd.,Changsha 410004,China)

机构地区：[1]湖南大学土木工程学院,长沙410082 [2]长沙理工大学土木工程学院,长沙410114 [3]湖南大兴加固改造工程有限公司,长沙410006 [4]中国建筑第五工程局有限公司,长沙410004

出　　处：《建筑结构》2024年第8期97-101,共5页Building Structure

基　　金：国家自然科学基金资助项目(50778067)。

摘　　要：我国许多20世纪所修建的砖石砌体结构排水管渠面临年久失修、功能丧失等问题,影响城市的正常运作,亟需对其进行加固修缮。针对砌体结构排水管渠长期遭地下水冲刷、灰缝砂浆不饱满、性能劣化的特点,可采用注浆法填充原结构灰缝,在充分修复原结构的基础上再进行整体结构加固修复。为了验证注浆加固受损砌体的可行性,通过砌筑灰缝饱满度为50%~60%的砌体试件来模拟砌体灰缝砂浆长期受水流冲刷的状态,并完成6个注浆砖砌体、3个未注浆砖砌体的受压试验来对比分析注浆前后砖砌体的受力性能,根据试验结果,拟合砖砌体应力-应变曲线。结果表明,注浆后砖砌体的抗压强度为未注浆砌体的280%,注浆加固砌体的弹性模量和泊松比为未注浆砌体的281%、60%。证明注浆法能够改善受损砌体结构的力学性能,在砖石砌体结构排水管渠的加固工程中可起到修复原砌体结构的作用。Many brick and stone masonry drainage pipelines built in the 20th century in China face problems such as longterm disrepair and loss of function,which affect the normal operation of cities.It is urgent to reinforce and repair them.In view of the characteristics that the drainage pipeline and channel of masonry structure are scoured by groundwater for a long time,and the mortar of mortar joint is not full and performance is deteriorated,grouting method can be used to fill mortar joints of original structural,and on the basis of fully repairing the original structure,the whole structure can be strengthened and repaired.In order to verify the feasibility of grouting reinforcement of damaged masonry.The state of long-term water scouring and performance degradation of masonry mortar in mortar joint was simulated by masonry specimens with 50%~60%full degree of mortar joint.The compression test of 6 grouting brick masonry and 3 ungrouting brick masonry were completed to compare and analyze the mechanical performance of brick masonry before and after grouting.Based on the test results,the stress-strain curve of brick masonry is fitted.The results show that the compressive strength of brick masonry after grouting is 280%of non-grouting masonry,the elastic modulus and poisson’s ratio of grouting reinforced masonry is 281%、60%of those of non-grouting masonry respectively.It is proved that the grouting method can improve the mechanical properties of the damaged masonry structure,and can play important role in repairing the original masonry structure in strengthening the drainage pipeline and channel of masonry structure.

关 键 词：注浆 砖砌体 受压性能 排水管渠 加固 

分 类 号：TU362[建筑科学—结构工程]