隧洞混凝土衬砌灌浆封孔技术研究
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摘要
针对隧洞灌浆封孔作业中常出现空腔、封孔材料脱落及渗水等问题,研究提出了利用空压机和封孔器将流动性不高、收缩小、粘结性强、抗冲抗磨性好的预缩砂浆射进灌浆孔底部,将孔逐层填满的灌浆封孔方法,即预缩砂浆封孔法。由于利用封孔器进行灌浆封孔,简便易行,经济高效,经某隧洞应用后的多年运行实践表明,预缩砂浆封孔的质量良好。
In the grouting hole sealing work of concrete lining in tunnels, problems such as cavity, sealing material shedding and seepage are commonly encountered. A new sealing technique is proposed, in which the pre-shrinking mortar with low fluidity, small shrinkage, strong cohesion and good scour and wear resistance is injected into the grouting hole using the air compressor and sealer to fill the hole gradually from the bottom. Practice shows that the proposed technique can achieve satisfactory sealing performance and of great operation convenience and high efficiency.
In the grouting hole sealing work of concrete lining in tunnels, problems such as cavity, sealing material shedding and seepage are commonly encountered. A new sealing technique is proposed, in which the pre-shrinking mortar with low fluidity, small shrinkage, strong cohesion and good scour and wear resistance is injected into the grouting hole using the air compressor and sealer to fill the hole gradually from the bottom. Practice shows that the proposed technique can achieve satisfactory sealing performance and of great operation convenience and high efficiency.
引文
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[15]刘学才.大直径钻孔灌注桩施工设备选型[J].交通世界,2018(33):116-117
[2]陈晨.水利工程施工中灌浆施工技术简述[J].科技创新与应用,2018(35):144-145
[3]孙钊.大坝基岩灌浆[M].北京:中国水利水电出版社,2004
[4]刘成安,王永德.水工隧洞衬砌砼施工缝渗水问题的防治及处理[C]//2011全国水工泄水建筑物安全与病害处理技术交流研讨会论文集.南京,2011:27-31
[5]朱元志.跑马水库输水隧洞渗漏情况及灌浆处理[J].中国农村水利水电,2003(3):51-51,53
[6]SL 62-2014,水工建筑水泥灌浆施工技术规范[S]
[7]喇梅兰.水利工程中隧洞固结灌浆施工技术[J].绿色环保建材,2017(12):236-236
[8]冉瑞刚,谢明武,雷雪.锦屏二级水电站3#、4#引水隧洞固结灌浆质量控制[J].水利水电技术,2015,46(7):47-48,51
[9]林梓明.预缩水泥砂浆修补混凝土缺陷施工技术[J].建材与装饰,2016(27):48-48,49
[10]王洪英,刘立波.浅谈预缩砂浆在水利工程中的应用J].科学技术创新,2010(35):283-283
[11]漆巨彬,刘涛,李霄,等.龙滩水电站细微裂隙岩体和断层灌浆处理技术研究[C]//汪在芹.西部劣质地基与基础化学灌浆技术——第十三次全国化学灌浆学术交流会论文集.北京:中国水利水电出版社,2010:93-99
[12]梁瑞成,张清华,王兆福.“预缩”砂浆的制作方法和实际应用[J].黑龙江水利科技,2001,29(3):105-105
[13]朱国强.预缩砂浆在修补混凝土表面缺陷中的应用[J].南水北调与水利科技,2007,5(s1):77-78
[14]李冠华,胡春艳,孙成龙.使用预缩砂浆修补工程[J].水利天地,1997(6):24-25
[15]刘学才.大直径钻孔灌注桩施工设备选型[J].交通世界,2018(33):116-117