混凝土裂缝灌浆修复后声学信号特征分析

作者:郦亮 蔡慧静 张军 毛江鸿 郑博宇 李强
单位:宁波市轨道交通集团有限公司 宁波市建设工程安全质量管理服务总站 浙江大学宁波理工学院
摘要:大体积混凝土结构服役期间经常存在裂缝,可通过超声波技术进行检测。化学灌浆法为混凝土裂缝修复主要方法之一,修复效果关系到混凝土结构服役性能。因此,利用超声波技术对不同裂缝宽度试件灌浆修复效果进行跟踪检测,并分析灌浆修复过程中超声波首波波幅、声时等声学信号特征值。研究结果表明,有效修复区域超声波首波波幅明显提高,首波声时减小;可通过分析超声波声学信号特征值获取灌浆料覆盖范围,从而进行裂缝检测与修复效果评估。
关键词:混凝土灌浆超声波裂缝无损检测修复
作者简介:郦亮,高级工程师,E-mail:121434941@qq.com。
基金:国家自然科学基金(51638013);宁波市轨道交通集团有限公司科研攻关项目(01-2015-2-118)。 -页码-:62-65
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参考文献[1] 吉恩跃,陈生水,傅中志,等.土心墙堆石坝坝顶裂缝扩展有限元模拟[J].岩土工程学报,2018,40(S2):17-21.
[2] 康学云,徐文冰,郭佳嘉,等.南京长江第五大桥大体积混凝土温度裂缝智能控制技术研究[J].施工技术,2019,48(17):24-27,84.
[3] PICANDET V,KHELIDJ A,BELLEGOU H.Crack effects on gas and water permeability of concretes[J].Cement and concrete research,2009,39(6):537-547.
[4] SAHMARAN M.Effect of flexure induced transverse crack and self-healing on chloride diffusivity of reinforced mortar[J].Journal of materials science,2007,42(22):9131-9136.
[5] 张小军.土木工程中混凝土裂缝的成因与防治对策研究[D].武汉:湖北工业大学,2018.
[6] 张继霞,张捷.聚氨酯灌浆材料地铁防渗处理应用中存在问题探讨[J].中国建筑防水,2016(24):36-39.
[7] 中国葛洲坝集团股份有限公司,中国水电基础局有限公司,中国水电顾问集团华东勘测设计研究院.水工建筑物化学灌浆施工规范:DL/T 5406-2010[S].北京:中国电力出版社,2010.
[8] 李俊如,高建光,王耀辉.超声波检测混凝土裂缝及裂缝成因分析[J].岩土力学,2001(3):291-293.
[9] WANG H B,XU C G,XU Y.Ultrasonic inspection of complex composites[C]//2013 Far East Forum on Nondestructive Evaluation/Testing:new Technology&Application,2013.
[10] 魏来.利用i TECS技术检测混凝土结构弹性波速度及裂缝深度的研究[D].北京:北京交通大学,2012.
[11] 郭伟国,李玉龙,索涛.应力波基础简明教程[M].西安:西北工业大学出版社,2007.
[12] 朱俞仿.裂隙倾角对灌浆扩散半径的影响分析[J].中国矿山工程,2014,43(2):55-58,62.
[13] 蔡慧静,叶俊能,董宏波,等.大尺寸混凝土块的贯穿式裂缝的制造方法:CN109093823A[P],2018-12-28.
[14] 陕西省建筑科学研究设计院,同济大学.超声法检测混凝土缺陷技术规程:CECS 21∶2000[S].北京:中国城市出版社,2000.
Analysis of Acoustic Signal Characteristics for Concrete After Cracks Repaired by Grouting
LI Liang CAI Huijing ZHANG Jun MAO Jianghong ZHENG Boyu LI Qiang
(Ningbo Rail Transit Group Co.,Ltd. Ningbo Construction Engineering Safety and Quality Management Service Center Ningbo Institute of Technology,Zhejiang University)
Abstract: Cracks often exist in mass concrete structures during service,which can be detected by ultrasonic technology. Chemical grouting is one of the main methods to repair concrete cracks,and the effect of repair is related to the performance of service of concrete structures. Therefore,the technology of ultrasonic testing is used to track and detect the effect of repair for specimens of grouting with different widths of cracks. Moreover,the characteristic values of acoustic signals such as the headwave amplitude of ultrasonic waves and ultrasonic wave transit time during the process of repairing grouting are analyzed.The result shows that the amplitude of the headwave amplitude of ultrasonic waves in the areas for effective repair is significantly increased,and the ultrasonic wave transit time is decreased. The area of coverage of grouting materials can be obtained by analyzing the characteristic values of ultrasonic waves acoustic signals,so as to evaluate the effect of the testing of cracks and that of the repair.
Keywords: concrete; grouting; ultrasonic waves; cracks; nondestructive testing; repair
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