透水砖冻胀损坏试验研究  

Experimental study on frost-heaving damage of water permeable brick

作　　者：郭晓鹏 李俊奇[1,2] 梁云 张海龙 王志平 王文海 闫霄雯[1] GUO Xiaopeng;LI Junqi;LIANG Yun;ZHANG Hailong;WANG Zhiping;WANG Wenhai;YAN Xiaowen(Key Laboratory of Urban Stormwater System and Water Environment(Ministry of Education),Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Beijing Advanced Innovation Center for Future Urban Design,Beijing 100044,China;Zhuanghe Natural Resources Service Affairs Center,Zhuanghe 210283,Liaoning,China;Office of Leading Group for Construction and Promotion of Sponge City of Zhuanghe City,Zhuanghe 210283,Liaoning,China)

机构地区：[1]北京建筑大学城市雨水系统与水环境教育部重点实验室,北京100044 [2]北京未来城市设计高精尖创新中心,北京100044 [3]庄河市自然资源事务服务中心,辽宁庄河210283 [4]庄河市海绵城市建设推进工作领导小组办公室,辽宁庄河210283

出　　处：《水利水电技术（中英文）》2021年第8期172-180,共9页Water Resources and Hydropower Engineering

基　　金：北京市自然科学基金重点项目(8191001);国家水体污染控制与治理科技重大专项(2018ZX07110-008)。

摘　　要：在寒冷地区,透水砖铺装的冻胀损坏一直是影响其寿命的主要因素之一。通过冻胀损坏试验,研究陶瓷透水砖、水泥透水砖在冻结过程中外观变化和冻胀应力的变化规律,对其抗冻性能进行评价,最后结合试验数据提出相应的抗冻胀技术改进措施。研究表明:陶瓷透水砖的抗冻性能优于水泥透水砖。在水饱和度为完全饱和、有侧限条件下,陶瓷透水砖的最大冻胀应力为1.42 MPa,水泥透水砖的最大冻胀应力为1.67 MPa;在水饱和度为完全饱和、无侧限条件下,陶瓷透水砖的最大冻胀应力为0.21 MPa,水泥透水砖的最大冻胀应力为0.22 MPa。透水砖的抗冻防治措施应从提高砖体强度和耐久性、降低水饱和度、应力释放和加强透水砖铺装后期维护管理等几方面采取综合措施。在分析有侧限、无侧限试验条件下透水砖冻胀应力的大小差值较大的基础上,提出干砂灌缝或设置伸缩缝、基层或垫层增设导水管(板)、增设辅助设施等透水砖铺装抗冻胀技术改进措施。In cold regions,the frost-heaving damage of water permeable brick pavement is one of the main factors affecting its working life.Through the relevant experiment made on the frost-heaving damage,the changing laws of the appearance change and the frost-heaving stress of both ceramic water permeable brick and cement water permeable brick are studied herein,in which the frost-heaving resistances of them are evaluated,while the corresponding improvement measures of the frost-heaving resistance technology are finally proposed in accordance with the relevant experimental data.The study results show that the performance of the frost-heaving resistance of ceramic water permeable brick is better that that of the cement water permeable brick.Under the condition that the water saturation is completely saturated with lateral confinement,the maximum frost-heaving stress of ceramic water permeable brick is 1.42 MPa and the maximum frost-heaving stress of cement water permeable brick is 1.67 MPa,while the maximum frost-heaving stress of ceramic water permeable brick is 0.21 MPa and the maximum frost-heaving stress of cement water permeable brick is 0.22 MPa under the condition that the water saturation is completely saturated without lateral confinement.The frost-heaving resistance and prevent measures must be comprehensively made from the aspects of enhancing the brick body strength,lowering water saturation,stress releasing,strengthening the maintenance and management in late period,etc.On the basis of analyzing the larger difference between the frost-heaving stresses of water permeable brick under the conditions of the experiments with and without lateral confinement,the improvement measures for the frost-heaving resistance technology,i.e.joint filling with dry sand,expansion joint arrangement,adding water-conducting pipe(board)under the substrate or cushion layer,adding the relevant auxiliary facilities,etc.are put forward.

关 键 词：透水砖 冻胀应力 抗冻胀 城市雨水管理 海绵城市 饱和度 低影响开发 

分 类 号：TU992[建筑科学—市政工程]