注浆处置机场水泥混凝土道面严重错台技术研究

错台是机场水泥混凝土道面常见的病害,影响飞机通行舒适性,严重时甚至对飞机行驶构成安全隐患。上海某机场在我国首次采用注浆大范围精确抬升道面板块以消除道面错台,工程涉及到精确抬升控制和不停航施工安全控制,工程难度大。分析了该工程注浆方案中的关键技术参数确定方法,包括推导了最小注浆压力计算公式、浆液扩散半径计算方法、注浆深度和控制指标选取,以及监测方案制定等。借助有限元软件,通过数值模拟,分析了抬升过程中的道面受力状态是安全可控的。该工程的研究成果可以作为我国机场和公路行业其他类似工程提供技术依据和参考。

Research on Grouting Disposal Technology for Serious Slab Staggering of Airport Cement Concrete Pavement

The slab staggering is a common fault of airport cement concrete pavement.This fault will impact the comfortableness of aircraft,and even pose a security risk for the aircraft flight if seriously.A large range of precision uplifting pavement slab is firstly grouted for an airport in Shanghai of China in order to eliminate the slab staggering of pavement.The engineering is involved to the precision uplifting control and no-stop construction security control,which have the great engineering difficulties.The article analyzes the key technical parameter determination method in the grouting scheme of this project,derivates the minimum grouting pressure calculation formula,introduces the calculation method of fluid diffusion radius,selects the grouting depth and control index,and draws up the monitoring scheme.With the help of the finite element software and by the numerical simulation,the analysis shows that pavement stress state during slab uplift is safe and controllable.The research findings of this project can offer reference data for the similar projects of airport and highway industry in China.