渗透型高聚物与过江盾构隧道接缝混凝土界面特性  

Interfacial behavior of permeable polymer and concrete at joints of cross-river shield tunnels

作　　者：王钰轲 李朕宇 钟燕辉[1,2,3] 余翔 张蓓 冯大阔[4] WANG Yuke;LI Zhenyu;ZHONG Yanhui;YU Xiang;ZHANG Bei;FENG Dakuo(School of Water Conservancy and Transportation,Zhengzhou University,Zhengzhou 450001,China;National Local Joint Engineering Laboratory of Major Infrastructure Testing and Rehabilitation Technology,Zhengzhou 450001,China;Provincial and Ministerial Collaborative Innovation Center for Underground Engineering Disaster Prevention and Control,Zhengzhou 450001,China;China Construction Seventh Engineering Division Corp.,LTD.,Zhengzhou 450001,China)

机构地区：[1]郑州大学水利与交通学院,河南郑州450001 [2]重大设施监测修复技术国家地方联合工程实验室,河南郑州450001 [3]地下工程灾变防控省部共建协同创新中心,河南郑州450001 [4]中国建筑第七工程局有限公司,河南郑州450001

出　　处：《岩土工程学报》2023年第S02期195-200,共6页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金面上项目(52079126);河南省优秀青年基金项目(232300421069);中原科技创新领军人才资助项目(234200510014);河南省交通运输厅科技项目(2022-5-5)。

摘　　要：接缝渗漏是运营期过江盾构隧道的主要病害之一,盾构隧道工程常用注浆材料在隧道渗漏处治中与接缝混凝土黏结性能较差,造成渗漏处治效果不理想。在现有注浆材料的基础上研发了新型渗透型高聚物,为进一步研究新型渗透型高聚物用于隧道接缝渗漏处治的适用性,考虑了界面潮湿度、法向荷载、界面粗糙度等因素,设计了渗透型高聚物–混凝土界面直剪试验,研究了界面潮湿度、法向荷载、界面粗糙度等因素对渗透型高聚物–混凝土界面黏结性能的影响,建立并验证了渗透型高聚物–混凝土界面抗剪强度理论模型。结果表明:渗透型高聚物–混凝土界面抗剪强度与法向应力、界面粗糙度呈正比,与隧道潮湿程度呈反比。各因素对渗透型高聚物–混凝土界面抗剪强度的影响从大到小的排序为法向应力>粗糙度>潮湿度。渗透型高聚物–混凝土界面抗剪强度线性回归理论模型服从残差正态分布,能够直观预测抗剪强度与各因素间的定量关系。渗透型高聚物–混凝土界面抗剪强度最高可达1.5 MPa,符合过江盾构隧道渗漏处治需求。Joint leakage is one of the main diseases of shield tunnels crossing rivers during operation.The bonding performance with joint concrete and commonly used grouting materials in shield tunnel engineering is poor.The effects of common materials used for leakage treatment are limited.The authors has developed a new type of permeable polymer based on the existing grouting materials.A series of tests are carried out to investigate the applicability of the new permeable polymer for joint leakage treatment of tunnels.A theoretical model for the interface between the permeable polymer and the concrete is established and validated.The main conclusions are as follows:the interfacial shear strength between the permeable polymer and the concrete segments is directly proportional to the interfacial roughness and normal stress,and inversely proportional to the degree of humid condition of tunnels.The degree of influences of various factors on the interfacial strength is normal pressure>interfacial roughness>interfacial humidity.The residual error of linear regression theoretical model for the shear strength of interface between the polymer and the segment concrete obeys the normal distribution.The shear strength of the interface between the permeable polymer and the concrete can reach up to 1.5 MPa.The permeable polymer meets the needs of leakage treatment in cross-river shield tunnels.

关 键 词：过江盾构隧道 渗透型高聚物 单调直剪试验 抗剪强度 线性回归分析 

分 类 号：U457[建筑科学—桥梁与隧道工程]