适用于致密碎粉岩富水地层的高强丙烯酸盐注浆材料研发及渗透加固特性研究  

Development and permeability reinforcement characteristics of high-strength acrylic salt grouting materials for water-rich ultracataclasite

作　　者：杨磊[1] 宓祥云 李召峰[1] 屠文锋 谢云鹏 胡浩 王康 YANG Lei;MI Xiangyun;LI Zhaofeng;TU Wenfeng;XIE Yunpeng;HU Hao;WANG Kang(Research Center of Geotechnical and Structural Engineering,Shandong University,Ji'nan 250061,China;School of Qilu Transportation,Shandong University,Ji'nan 250002,China;Sinohydro Bureau 14 Co.,Ltd.,Kunming 650041,China)

机构地区：[1]山东大学岩土与结构工程研究中心,山东济南250061 [2]山东大学齐鲁交通学院,山东济南250002 [3]中国水利水电第十四工程局有限公司,云南昆明650041

出　　处：《岩土工程学报》2025年第3期525-534,共10页Chinese Journal of Geotechnical Engineering

基　　金：云南省重点研发计划项目(202103AA080016);国家重点研发计划项目(2022YFB2601900,2022YFB2601903);国家自然科学基金项目(51979153,52209138,52178338);山东省重点研发计划(重大科技创新工程)项目(2020CXGC011405,2021CXGC010301);博士后创新项目(SDCX-ZG-202203037)。

摘　　要：针对富水致密软弱围岩致灾性强、常规注浆材料适用性弱的问题,开展了新型高强丙烯酸盐注浆材料研发,分析了其聚合反应机理及工作性能影响规律,研究了该新型材料对致密碎粉岩的渗透加固特性。基于有机-无机互穿网络方法,研发了高强丙烯酸盐注浆材料,由主剂、无机改性剂、引发剂、促进剂、交联剂等原料组成,具有高强、高渗的显著特点;高强丙烯酸盐材料两组分混合后聚合反应充分,无机网络结构均匀穿插于丙烯酸盐有机凝胶网络中;基于正交试验获得了不同组成的新型材料胶凝时间、凝胶体抗压强度及吸水膨胀率特征指标及组分影响规律,浆液胶凝时间范围为45~201 s,凝胶体单轴抗压强度范围为1.2~2.1 MPa、吸水膨胀率范围为16%~51%,并进一步阐明了新型材料主要工作性能的影响因素敏感性排序;基于室内试验及微观分析,研究了浆液在致密碎粉岩中的渗透加固特性,结果表明高强丙烯酸盐浆液与纯丙烯酸盐浆液的渗透扩散能力接近,远大于水泥浆液,且高强丙烯酸盐材料对碎粉岩颗粒起到明显的包裹强化作用,加固体强度达2.31 MPa,是纯丙烯酸盐材料加固强度的5.4~11.0倍,可为隧洞灾害注浆治理与安全掘进提供有力的安全保障。Aiming at the problems of strong disasters caused by water-rich dense weak surrounding rock and weak applicability of the conventional grouting materials,a new type of high-strength acrylic acid grouting material is developed,its polymerization reaction mechanism and working performance are analyzed,and the permeability and reinforcement characteristics of the new material on dense pulverized silty rock are studied.Based on the organic-inorganic interpenetrating network method,the high-strength acrylic acid grouting material is developed,which is composed of the main agent,inorganic modifier,initiator,accelerator,crosslinking agent and other raw materials,and it has remarkable characteristics of high strength and high permeability.The polymerization reaction of the two components of the high strength acrylate material is sufficient after mixing,and the inorganic network structure is evenly interspersed in the acrylate organogels network.According to the orthogonal tests,the characteristics of the new materials with different compositions,such as the gelling time,compressive strength and water absorption expansion rate as well as the influence rules of the components,are obtained.The gelling time range of the slurry is 45~201 s,the uniaxial compressive strength of the gel is 1.2~2.1 MPa,and the water absorption expansion rate is 16%~51%.The sensitivity ranking of factors affecting the main working properties of the new materials is further clarified.In accordance with the laboratory tests and microanalytical analysis technology,the permeability and reinforcement characteristics of grout in dense crushed rock are studied.The results show that the permeability and diffusion capacity of the high-strength acrylate grout is close to that of the pure one,which is much higher than that of the cement grout.Moreover,the high-strength acrylate material has an obvious coating and strengthening effect on crushed rock particles,and the solid strength reache 2.31 MPa.It is 5.4~11.0 times the reinforcement strength of the pure a

关 键 词：富水软弱围岩 碎粉岩 注浆材料 高强丙烯酸盐 有机-无机网络穿插技术 渗透加固 

分 类 号：TU525[建筑科学—建筑技术科学]