基面粗糙度对喷膜防水层粘结性能影响的试验研究  

Experimental Study on the Influences of Base Roughness on the Bond Performance of Sprayed Waterproof Membrane

作　　者：杨娟[1,2] 杨其新 邱品茗[1] Yang Juan;Yang Qixin;Qiu Pinming(Key Laboratory of Transportation Tunnel Engineering,Ministry of Education,Southwest Jiaotong University,Chengdu 610031,P.R.China;School of Railway Transportation,Shanghai Institute of Technology,Shanghai 201418,P.R.China)

机构地区：[1]西南交通大学交通隧道工程教育部重点实验室,成都610031 [2]上海应用技术大学轨道交通学院,上海201418

出　　处：《地下空间与工程学报》2022年第4期1226-1232,共7页Chinese Journal of Underground Space and Engineering

基　　金：国家自然科学基金项目(51178401);上海应用技术大学引进人才项目(10120K216062-A06);“一带一路”中老铁路工程国际联合项目实验室资助项目(21210750300)。

摘　　要：针对隧道渗漏水严重的问题,采用一种新型隧道喷膜防水技术以建立与前、后混凝土均具有粘结性能的隧道支护结构形式(CSL)。从而克服混凝土加防水板的传统支护结构在防水性能上的弊端。喷膜防水层与前、后混凝土间的粘结性能是CSL设计的一个重要参数,直接决定CSL的防水和支护性能。鉴于此,开展了CSL隧道支护结构喷膜防水层粘结性能试验,研究了基面粗糙度对CSL粘结性能的影响。研究表明:增大基面粗糙度,可以提高防水膜层与基面的粘结性能;通过扫描电镜观察接触面微观形貌,界面处观察到由喷射混凝土到膜层的过渡区,即膜材料填充喷射混凝土的粗糙面、表面孔隙结构,增大了喷膜层与喷射混凝土间的机械咬合力,从微观角度解释了增大基面粗糙度可以提高粘结性能的机理。研究结果对喷膜防水技术在隧道中的应用具有实际意义。In view of the serious problem of tunnel water leakage, a new tunnel spray film waterproof is adopted to establish the tunnel support structure(Composite Shell Linings, CSL) which has bonding property with both front and back concrete. Thus, the disadvantages of waterproof performance of the traditional supporting structure with concrete and waterproof board can be overcome, directly determining the waterproof and support performance of CSL. Therefore, the bond performance tests of spray film waterproof layer of CSL tunnel support structures are carried out, and the influences of base roughness on the bond performance of CSL are studied. The results show that: increasing the roughness of the base surface can improve the bonding performance between the waterproof film and the base surface. The microscopic morphology of the contact surface was observed by scanning electron microscope, and the transition area from shotcrete to membrane was observed at the interface, that is, the membrane material filled the rough surface and surface pore structure of shotcrete, which increased the mechanical interface between the shotcrete and the shotcrete. The bite force explains the mechanism by which increasing the roughness of the base surface can improve the bonding performance from a microscopic point of view. These research results have practical significance for the application of acrylate spray film waterproof layer in tunnel.

关 键 词：隧道工程 粘结性能 喷膜防水 粗糙度 

分 类 号：TU57[建筑科学—建筑技术科学]