Grouting Reinforcement Rechnique Application In The Settlement Of Metro Tunnel Structure Processing Research

Along with our country city degree improve rapidly, many domestic big city are racing todevelop rapid rail transportation system to the subway as the main lines. Development ofconstruction technology and construction process of shield also matures, the shield method tothe city ground low environmental impact, as the main construction method of subway tunnelunder the environment of the city. However, in the soft soil area saturation, high sensitivity,shield tunnel often occurred uneven longitudinal settlement, the tunnel longitudinal internalforce, deformation, waterproofing of joints, and the normal operation of tunnel effects can notbe ignored. Metro vehicle high speed running on the track smoothness requirements, andmetro tunnel is the load bearing structures of the train operation, its structure is slender,flexible degree, when the structure stress imbalance, is extremely easy to make a tunnel oflocal deformation, changes resulting in track alignment, influence of train operation. Study onReinforcement Technology in the processing of applications of metro tunnel structuresettlement so grouting, is very necessary and urgent. On the basis of grouting reinforcementdoes the following research technique in the treatment of subway tunnel settlement:(1) summarizes the various factors influencing the settlement of metro tunnel structure;according to the characteristics of subway tunnel itself, discusses the settlement monitoringreference net and the measurement method, processing and analyzing sedimentationmonitoring of tunnel construction monitoring data, the concrete describes the process ofsubway tunnel construction settlement monitoring.(2) the grouting reinforcement technology in the domestic and foreign research presentsituation as well as the mechanism of action.(3) evaluation of grouting reinforcement technology in subway tunnel settlement inengineering application and grouting effect.International Tunnelling Association (ITA) proposed in other loads when necessary willaffect the tunnel longitudinal settlement included in the load types considered in shield tunneldesign in2000, Shanghai foundation design code provisions for the design of shield tunnel isput forward in when necessary, especially soil soil lying in the tunnel shall be verticalinfluence of uneven settlement of tunnel internal force considered tunnel, which indicates thatthe tunnel longitudinal settlement especially the influence of uneven settlement of tunnel hascaused abroad attention in engineering field. This paper summarizes the design content,settlement grouting reinforcement method in structural repair of tunnel construction technology, quality inspection, and analyzes the technology need to be paid attention to in thedesign, the problems in the application, can be used for future similar project reference.