基于CSL隧道支护结构的喷膜防水层黏结性能试验研究  

Experimental Study on the Bonding Performances of Spray-applied Waterproofing Membrane in Tunnels with CSL Structure

作　　者：杨娟 杨其新[2,3] 邱品茗[2,3] YANG Juan;YANG Qixin;QIU Pinming(School of Railway Transportation,Shanghai Institute of Technology,Shanghai 201418;Key Laboratory of Transportation Tunnel Engineering of Ministry of Education,Southwest Jiaotong University,Chengdu 610031;School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031)

机构地区：[1]上海应用技术大学轨道交通学院,上海201418 [2]西南交通大学交通隧道工程教育部重点实验室,成都610031 [3]西南交通大学土木工程学院,成都610031

出　　处：《现代隧道技术》2022年第1期104-110,175,共8页Modern Tunnelling Technology

基　　金：国家自然科学基金(51178401);上海应用技术大学引进人才项目(10120K216062-A06)。

摘　　要：文章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,建立与前、后混凝土均具有黏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、后混凝土间的黏结性能是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,文章开展了CSL隧道支护结构喷膜防水层黏结性能试验,研究喷射混凝土基面干湿状态、膜层厚度对CSL黏结性能的影响。研究表明:层间黏结强度与膜层厚度的平方根成反比;在保证喷射混凝土基面无流动水的情况下,喷射混凝土基面含水有助于提高防水膜与喷射混凝土的黏结强度,充分发挥其黏结性能;随着含水率的增加,CSL结构黏结强度呈现逐渐增大的趋势。In view of the serious problem of water leakage in tunnels, this paper adopts a new spray-applied waterproofing membrane technology to establish a form of tunnel composite shell lining(CSL) structure with bonding properties to both outer and inner concrete layer, thus overcoming the drawbacks of the traditional supporting structure of concrete layer with waterproofing boards in terms of waterproofing performance. The bonding performance between the spray-applied waterproofing membrane and the outer and inner concrete layer is an important parameter in the CSL design and directly decides the waterproofing and supporting performance of the CSL. In view of this, this paper carries out a bonding performance test on the spray-applied waterproofing membrane for the tunnel CSL structure, studies the impacts of dry and wet states of the shotcrete surface, and the membrane thickness on the CSL bonding performance. The research results show that the interlayer bonding strength is inversely proportional to the square root of the membrane thickness;Under the premise of no flowing water on the shotcrete surface, the waterbearing shotcrete surface helps to improve the bonding strength of the waterproofing membrane to the shotcrete and gives full play to its bonding properties;With the increase of the water content, the bonding strength of the CSL structure shows a gradual increase.

关 键 词：隧道工程 黏结性能 喷膜防水 支护结构 

分 类 号：U454[建筑科学—桥梁与隧道工程]