隧道突发水害聚氨酯复合注浆材料的制备及性能评价  

Preparation and performance evaluation of polyurethane composite grouting material for tunnel burst water damage

作　　者：周新星 郑玉婴[2] 陈乘鑫[2] 胡文忠 ZHOU Xinxing;ZHENG Yuying;CHEN Chengxin;HU WenZhong(Key Laboratory of Highway Construction and Maintenance Technology in Loess Region of Ministry of Transport,Shanxi Transportation Technology Research&Development Co.,Ltd,Taiyuan 030032;College of Materials Science and Engineering,Fuzhou University,Fujian Fuzhou 350108;Fujian Provincial Cheng Hong Construction Group Co.,Ltd,Fujian Xiamen 361000)

机构地区：[1]山西省交通科技研发有限公司黄土地区公路建设与养护技术交通行业重点实验室(公路工程研究院),山西太原030032 [2]福州大学材料科学与工程学院,福建福州350108 [3]福建省城弘建设集团有限公司,福建厦门361000

出　　处：《化学工程与装备》2022年第8期4-9,共6页Chemical Engineering & Equipment

基　　金：国家自然科学基金(52008235、52178437);福建省科技重大专项专题项目(2021HZ027002);山西省科技成果转化引导专项(201804D131034);泉州市科技计划重大项目(2021C002R)。

摘　　要：隧道突发水害具有量大势猛的特点,注浆技术是解决隧道突发水害的主要技术,而聚氨酯注浆材料处治隧道突发水害则具有先天优势。本文在普通聚氨酯的基础上加入粉煤灰、炉底渣、电石渣等固体废弃物,并辅以水泥、碱激发剂等制备地聚物胶凝材料,通过调控各组分的比例及固废掺量使得体系同时存在聚氨酯和地聚物,形成聚氨酯复合注浆材料。借助表观密度测定仪、微机控制电子万能试验机、扫描电镜综合分析聚氨酯复合注浆材料物理性能和力学特性,以揭示聚氨酯复合注浆材料的固化机理,评价聚氨酯复合注浆材料在隧道突发水害特别是突水突泥病害中应用的可行性。结果表明,聚氨酯复合注浆材料的密度为0.2g/cm^(3)-0.8g/cm^(3),抗压强度为3.9MPa-15.0MPa,渗透系数均处于10cm/s数量级,聚氨酯发泡后部分粉煤灰、炉底渣、电石渣填充聚氨酯复合注浆材料泡沫孔隙,部分粉煤灰、炉底渣、电石渣相互之间发生化学反应生成地聚物胶凝材料,从而增强聚氨酯复合注浆材料的力学特性。由于粉煤灰、炉底渣、电石渣活性较差,地聚物固化速率较慢,因此会降低聚氨酯复合注浆材料整体的固化速度,延长固化时间。The sudden water damage in the tunnel has the characteristics of large quantity and great potential.The grouting technology is the main technology to solve the sudden water damage in the tunnel,and the polyurethane grouting material has an inherent advantage in treating the sudden water damage in the tunnel.In this paper,solid wastes such as fly ash,furnace bottom slag,carbide slag,etc.are added to ordinary polyurethane,supplemented by cement,alkali activator,etc.to prepare geopolymer cementitious materials.By adjusting the proportion of each component and the solid waste The dosage makes the system coexist with polyurethane and geopolymer to form a polyurethane composite grouting material.The physical properties and mechanical properties of polyurethane composite grouting materials were comprehensively analyzed with the help of apparent density tester,microcomputer-controlled electronic universal testing machine,microcomputer-controlled electronic universal testing machine,and scanning electron microscope to reveal the curing mechanism of polyurethane composite grouting materials and evaluate polyurethane composite grouting materials.The feasibility of applying grouting materials to sudden water damage in tunnels,especially water and mud inrush diseases.The results show that the density of the polyurethane composite grouting material is 0.2g/cm^(3)-0.8g/cm^(3),the compressive strength is 3.9MPa-15.0MPa,and the permeability coefficient is in the order of 10cm/s.Part of the fly ash after polyurethane foaming,furnace bottom slag and carbide slag fill the foam pores of polyurethane composite grouting materials,and some fly ash,furnace bottom slag and carbide slag chemically react with each other to form geopolymer cementitious materials,thereby enhancing the mechanics of polyurethane composite grouting materials.characteristic.Due to the poor activity of fly ash,furnace bottom slag and carbide slag,the solidification rate of the geopolymer is slow,which will reduce the overall solidification speed of the polyurethan

关 键 词：聚氨酯复合注浆材料 地聚物 粉煤灰 炉底渣 电石渣 隧道工程 

分 类 号：U457.2[建筑科学—桥梁与隧道工程]