考虑注浆圈作用下断层区隧道涌水量计算  

Tunnel Discharge Calculation Considering Grouting Circle Effect in Fault Zone

作　　者：田志莹 纪禄凌 李晓逸 刘毓氚[3] 张旭光 TIAN Zhi-ying;JI Lu-ling;LI Xiao-yi;LIU Yu-chuan;ZHANG Xu-guang(School of Architectural and Civil Engineering,Chongqing Metropolitan College of Science and Technology,Chongqing 400067,China;Xiamen Road&Bridge Construction Group Engineering Co.,Ltd.,Xiamen,Fujian 361026,China;School of Civil Engineering,Fuzhou University,Fuzhou,Fujian 350108,China)

机构地区：[1]重庆城市科技学院建筑与土木工程学院,重庆400067 [2]厦门路桥建设集团工程有限公司,福建厦门361026 [3]福州大学土木工程学院,福建福州350108

出　　处：《公路交通科技》2024年第12期198-205,共8页Journal of Highway and Transportation Research and Development

基　　金：福建省交通运输厅科技项目(201804)。

摘　　要：经断层区的富水山岭隧道,施工过程中常遇突水和涌水,造成施工停滞和地下水流失。为探究断层区注浆对涌水量的影响,基于复合衬砌式的山岭隧道,建立断层区隧道涌水量简化模型,在空间上采用等效断层方法,利用镜像法将断层作为补给边界,推导考虑注浆圈作用下深度埋设隧道涌水量公式,得到了隧道涌水量与注浆圈厚度、注浆圈相对渗透系等参数之间的关系。通过退化解、数值模型共同验证了该方法的及半解析解的适用性和正确性,误差在可接受范围内。对隧道涌水量进行地下水位高度、衬砌厚度和注浆圈等进行参数分析工作。研究结果表明:断层区的富水山岭隧道涌水量主要控制因素为:注浆圈厚度、注浆圈相对渗透系数及衬砌厚度。地下水位不变的条件下,涌水量受断层与隧道的距离影响较大;衬砌厚度越大堵水的作用越强,断层区内隧道的涌水量越小。注浆圈相对渗透系数对涌水量影响为敏感;围岩渗透系数与注浆圈渗透系数的比值小于50时涌水量与注浆圈厚度之间呈现线性关系,而注浆圈渗透系数较低时,注浆圈的厚度对涌水量的影响比较显著。对于山岭隧道的防排水设计而言,在保证注浆圈厚度的情况下,应优先考虑优化注浆材料的渗透性能,以实现更为高效的地下水控制。该研究成果旨在为设计和施工实践提供参考,以便于隧道穿越断层堵水注浆的研究。The water-rich mountain tunnels,passing through the fault zone,often encounter the water inrush and discharge during construction,resulting in construction stagnation and groundwater loss.To investigate the influence of grouting on water discharge in fault zones,the simplified tunnel discharge model in fault zone was established based on the composite lining mountain tunnels.The equivalent fault method was used in space,and the fault was used as the supply boundary with the image method.The formula for deep-buried tunnel discharge considering the grouting circle effect was derived.The relations between tunnel discharge and parameters(e.g.,grouting circle thickness,and relative permeability of grouting circle)were obtained.The proposed method applicability and correctness and the semi-analytical solution were verified through the degenerate solutions and numerical models.The parameter analysis was performed on the groundwater level,lining thickness,and grouting circle of tunnel discharge.The result indicates that the main controlling factors for water-rich mountain tunnel discharge in the fault zone are the grouting circle thickness,the relative permeability coefficient of grouting circle,and the lining thickness.Under the condition of constant groundwater level,the tunnel discharge is significantly affected by the distance between fault and tunnel.The thicker the lining,the stronger the water blocking effect,and the smaller the tunnel discharge in the fault zone.The relative permeability coefficient of grouting circle is sensitive to the tunnel discharge effect.When the ratio of surrounding rock permeability coefficient to grouting circle permeability coefficient is less than 50,there is a linear relation between discharge and grouting circle thickness.However,when the grouting circle permeability coefficient is less,the grouting circle thickness has a significant effect on tunnel discharge.For the mountain tunnel waterproof and drainage design,in the case of ensuring grouting circle thickness,the priority should

关 键 词：隧道工程 渗流场 镜像法 涌水量 注浆圈 

分 类 号：U453.6[建筑科学—桥梁与隧道工程]