砂性富水地层盾构同步注浆浆液性能及其适应性试验研究  

Study on Performance and Adaptability of Grouting Slurry for Shield Tunneling in Sandy Aquifer Formation

作　　者：杨晓虎 黄醒春[2] Yang Xiaohu;Huang Xingchun

机构地区：[1]中铁十九局集团有限公司 [2]上海交通大学

出　　处：《隧道与轨道交通》2024年第3期30-34,74,共6页Tunnel and Rail Transit

摘　　要：针对渗透性富水地层盾构同步注浆及其对浆液物理力学性能的要求,通过对2种C-S双液浆的试验,系统研究了水泥、水玻璃模数及其掺入比对浆液工程性能的影响,探讨了2种C-S双液浆的作用机理及其在砂性富水地层中的适应性。结果表明:425普通硅酸盐水泥C-S双液浆黏性特性、凝固时间、早期强度等性能指标明显优于其他类型C-S双液浆,对强渗透性富水地层具有更好的适应性;高模数水玻璃的选用有利于缩短浆液凝固时间,提高黏聚力和早期强度,从而有利于提高渗透性富水地层盾构同步注浆技术效果;在硅酸盐类C-S双液浆中,适度提高水玻璃模数并控制其掺入量,可以显著提高浆液技术性能及其对砂性富水地层的适应性。In response to the requirements for grouting slurry physical and mechanical properties in permeable aquifer formations during shield tunneling,systematic experiments were conducted on two types of C-S(cement-sodium silicate) double-liquid grouting slurries.The effects of cement type,sodium silicate modulus,and their mixing ratios on the engineering performance of the slurry were studied.The mechanisms of action and adaptability of these two C-S double-liquid slurries in sandy aquifer formations were also explored.The results indicate that the 425 ordinary Portland cement C-S double-liquid slurry exhibits superior performance characteristics such as viscosity,setting time,and early strength compared to other types of C-S double-liquid slurries,making it more suitable for highly permeable aquifer formations.The use of high-modulus sodium silicate helps shorten the setting time and improve the early strength and cohesion of the slurry,thus enhancing the effectiveness of grouting technology in permeable aquifer formations.In silicate-based C-S double-liquid slurries,moderately increasing the sodium silicate content and controlling its proportion(1.0% to 2.0%) can significantly improve the technical performance of the slurry and its adaptability to sandy aquifer formations.

关 键 词：盾构同步注浆 渗透性富水地层 C-S双液浆性能 配制参数 试验优化 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]