中国铁道科学2011，Vol.32Issue(4)：38-45,8.
盾构隧道同步注浆浆液压力扩散模式研究
Study on the Grout Pressure Dissipation Mode in Simultaneous Backfill Grouting during Shield Tunneling
摘要
Abstract
Based on the typical four-hole grouting, the grout in simultaneous backfill grouting during shield tunneling was regarded as inertia grout. The shield tail void formed in unit time was taken as the cross section of grout filling, and the dissipation process of the grout pressure in the cross filling section was taken as the research object. By means of Newton fluid model, and using the basic principle of Fluid Mechanics and Limit Equilibrium Method, the grout pressure dissipation model in the cross section of shield tail void was derived. Certain practical engineering case was studied, and the calculation results obtained by the deduced grout pressure dissipation model agree well with the measured values. The grout density has a decisive role on the initial grout pressure distribution when the grout injection into the shield tail void just begins. The increase of grout viscosity (time) will lead to an obvious decrease of grout pressure in later period. Four-hole grouting is more applicable to metro shield tunnel with the radius around 3 m. With the increase of shield tail void thickness, the grout pressure first shows a parabolic increase, and then gradually becomes stable.关键词
盾构隧道/盾尾空隙/浆液压力/扩散模式Key words
Shield tunnel/ Shield tail void/ Grout pressure/ Dissipation mode分类
交通工程引用本文复制引用
白云,戴志仁,张莎莎,彭芳乐..盾构隧道同步注浆浆液压力扩散模式研究[J].中国铁道科学,2011,32(4):38-45,8.基金项目
国家科技“十一五计划”支撑项目(2006BAJ27B02-02) （2006BAJ27B02-02）
上海科技支撑项目(09231200202) （09231200202）
