砂质隧道复合注浆加固技术与其应用研究  

Research on Composite Grouting Reinforcement Technology for Tunnels in Rich Water and Sandy Strata

作　　者：秦鹏飞 陈涛 周想云 QIN Peng-fei;CHEN Tao;ZHOU Xiang-yun(Department of Engineering,Huanghe University of Science and Technology,Zhengzhou 451000,Henan Province,China)

机构地区：[1]黄河科技学院工学部,河南郑州451000 [2]重庆交通大学水利水运工程教育部重点实验室,重庆400074

出　　处：《中国农村水利水电》2025年第3期136-141,147,共7页China Rural Water and Hydropower

基　　金：河南省自然科学基金面上项目(252300421253);重庆交通大学水利水运工程教育部重点实验室开放基金(SLK2023B07);黄河科技学院博士科研启动基金项目(02032695)。

摘　　要：在地质环境日趋复杂和恶劣的工程背景下,注浆加固的质量要求越来越高,单一注浆方式、材料已不能满足工程建设的实际需要。通过材料复合与工艺复合,提出砂质隧道复合注浆的理念,以满足高水头、大流量松散砂砾地层对防渗和加固目标的苛刻要求。即针对低渗性致密砂层,采用高压劈裂方式产生构建浆脉骨架,继而对局部薄弱松散砂土区域实施渗透注浆,最终形成致密坚实的复合结构体系。对复合注浆技术中浆液劈裂扩散力学机制进行分析,推导了劈裂宽度、浆液压力及极限扩散距离的基本关系,然后基于弹性力学、结构力学的基本理论,对浆脉骨架、围岩复合结构稳定性进行了分析,科学评价了复合注浆的加固效果。最后选取重庆地铁10号线区间隧道,对复合注浆的实际加固效果进行了现场检测。In the increasingly complex and harsh geological environment of engineering,the quality requirements for grouting reinforcement are becoming higher and higher.A single grouting method and material can no longer meet the actual needs of engineering construction.This article proposes the concept of composite grouting for sandy tunnels through material composite and process composite,in order to meet the strict requirements for anti-seepage and reinforcement in high head and large flow loose gravel formations.That is,for low-permeability and dense sand layers,high-pressure fracturing method is used to generate a slurry vein skeleton,followed by infiltration grouting in locally weak and loose sand areas,ultimately forming a dense and solid composite structural system.This article analyzes the mechanical mechanism of slurry splitting and diffusion in composite grouting technology,derives the basic relationship between splitting width,slurry pressure,and ultimate diffusion distance.Then,based on the basic theories of elasticity and structural mechanics,the stability of the slurry vein skeleton and surrounding rock composite structure is analyzed,and the reinforcement effect of composite grouting is scientifically evaluated.Finally,the section tunnel of Chongqing Metro Line 10 is selected for on-site testing of the actual reinforcement effect of composite grouting.

关 键 词：砂质隧道 复合注浆 劈裂扩散 材料复合 工程应用 

分 类 号：TV223.34[水利工程—水工结构工程]