李俊文
【摘要】水泥混凝土路面在我国已有多年的使用历史,近年来,我国现有的水泥混凝土路面有相当一部分已接近或超过设计年限,随着交通量的增加,尤其是汽车轴载日益重型化,在连续荷载作用下,出现路面损坏,使用品质下降等情况,水泥混凝土路面最严重的病害路面板的断板直至破碎,而这种情况往往是由于板下脱空所引起的。如果能解决板底脱空问题,那么水泥混凝土路面的使用年限将大大延长,板下灌浆技术是很有效的解决办法,它是通过对水泥混凝土路面板下灌注水泥浆液、水泥粉煤灰浆液、水泥砂浆,充实板底脱空空隙,达到稳定水泥混凝土板块的目的,改善路面通车状况的方法。
【关键词】水泥混凝土路面;灌浆技术;应用
On the application of vacuum grouting Highway Construction Technology
Li Jun-wen
(Pengyang Highway Management SectionPengyangNingxia756500)
【Abstract】Cement concrete pavement has been used for many years in our history, in recent years, China's existing cement concrete pavement has been close to or over a considerable part of the design life, with the increase in traffic, especially in the automotive axle load increasingly heavy-duty, continuous under load, the emergence of road damage, decline in quality, etc. using cement concrete pavement of the most serious diseases of pavement breaker panels until broken, and this situation is often due to the lower plate Void caused. If we can solve the problem Slabs empty, then cement concrete pavement will greatly extend the life of the lower plate grouting technique is very effective solution, it is through the infusion of cement concrete pavement cement grout, cement fly ash slurry, cement mortar, full Slabs of empty voids, cement concrete blocks to stabilize the purpose of improving the method of road traffic conditions.
【Key words】Cement concrete pavement;Grouting technology;Application
水泥混凝土路面是我国公路路面主要形式之一,在我国公路网构成中占有较大比重。它具有强度高、刚度大、受温度影响小、使用寿命长等优点。但水泥混凝土路面接缝较多,对超载较为敏感,易发生脱空、唧泥、裂缝等先期病害,从而导致路面的破损。如何治理与预防脱空、唧泥等病害,搞好水泥混凝土路面的养护,延长公路的使用寿命,改善其通行能力,具有十分重要的意义。
1. 灌浆加固机理
灌浆法是指利用液压、气压或电化学原理,通过注浆把浆液均匀地注入地层中,浆液以填充,渗透和挤密等方式,赶走土颗粒间或岩石裂隙中的水分和空气后占据其位置,经一定时间后,浆液将原来松散的土粒或裂隙胶结成一个整体,形成一个结构新、强度高、防水性能好和化学稳定性良好的“结石体”。……