隧道病害综合整治施工技术研究

Study on Construction Technology of Comprehensive Treatment of Tunnel Disease

采用移动式简易架子车结构作为隧道病害整治施工平台,按照"清理原隧道衬砌混凝土表面→衬砌背后注浆回填→钢带加固→裂缝及渗漏水处治→衬砌背后地下水的疏排→镶贴瓷砖"的顺序进行隧道全断面的整治施工。利用改性环氧树脂胶来粘接二次衬砌模筑混凝土和钢带,同时采用化学锚栓进行锚固。以"大堵小排、封堵严密、排导通畅"为基本处治准则,凿槽埋管引排用于解决渗水的环向施工缝,灌缝嵌补用于处治无渗水环向施工缝的开裂,用防水渗透型涂料对部分点渗、面渗涂刷,用环氧树脂注浆嵌补衬砌局部开裂引起的干裂缝,衬砌背后地下水可通过钻孔排到横向盲沟,然后可通过中央排水管(仰拱底部)引排至洞外。

Usingthe mobile simple rack truck as a construction platform of tunnel disease treatment,the construction of the whole section of the tunnel is carried out in accordance with the order of“ clean - up of the original tunnel lining concrete surface -% lining back grouting backfill - steel strip reinforcement - crack andleaking water treatment - the groundwater drainagebehindlining-inlaid tile Modified epoxy resin adhesive bonding is used tosplicesteel strip and tunnel secondary lining concrete,meanwhile, they’ re combined with chemical anchor anchorage. Based on theprinciple of “ large block,small drainage”,pipe drainage is used for ciecle construction joint of seepage watermark. Irrigation joint is used for ciecle construction joint without seepage. Penetration - type waterproof coating is brushed for local point and surface infiltration. The cracks are repaired byepoxy resin grouting. The groundwater behind the lining is drained to the horizontal blind ditch,and thenis discharged to the outside of hole through the central drain at bottom of lining.