深埋富水岩溶隧道帷幕注浆参数优化分析

深埋富水岩溶隧道在施工过程中经常会发生突水和涌泥,严重影响施工进度,甚至会发生严重事故,造成重大经济损失.对于深埋富水地区的隧道,如何有效控制涌水,保证围岩稳定,对工程建设的安全有着重要的影响.以成都至贵阳的应山岩隧道富水段为例进行了模拟研究,利用有限元软件ABAQUS对隧道帷幕注浆进行数值模拟分析,通过对数据进行分析...

Optimization analysis of curtain grouting parameters for deep-buried water-rich karst tunnel

Water inrush and mud gushing often occur in the construction process of deep water-rich karst tunnels，which seriously affect the construction progress，and even cause serious accidents and great economic losses.Therefore，how to effectively control water gushing and ensure the stability of surrounding rock has an important impact on the safety of engineering construction for the tunnel in deep water-rich area.This paper takes the Yingshanyan tunnel from Chengdu to Guiyang as an example to carry out a simulation study.The finite element software ABAQUS is used to carry out a numerical simulation analysis of the tunnel curtain grouting.Through the analysis of the data and the comparison of the two working conditions，the influence of the grouting reinforcement ring on the flow rate of the inrush water is studied.The grouting parameters are optimized according to the numerical simulation results.The results show that the permeability coefficient of the grouting circle is one-fourth of the permeability coefficient of the surrounding rock，which is more economical and reasonable；reducing the grouting range to less than 4 m can reduce the cost of engineering materials.The results can provide a reference for the construction of this deep-buried，high-pressure，and water-rich tunnel.