本文针对外环线大型车道路面沉陷、碎裂、坑塘等缺损严重,维修与交通矛盾突出,表面补坑、加罩效果不佳,为此采用SD系列地聚合物灌浆材料在环西二大道、大型车道进行注浆加固试验,经对注浆前后同弹弯沉值的检测以及应用观察表明,加固补强效果明显,实现了非开挖无障碍加固的目的,取得了良好的经济、技术和社会效益,值得推广应用。 In this paper, aiming at the serious defects such as road surface subsidence, fragmentation and pit pond in outer ring lane, the contradiction between maintenance and traffic is prominent, the surface is filled with pits and the effect of adding cover is not good. Therefore, SD series geosynthetic grouting material is used in the Second Ring Road, For large-sized lanes, grouting reinforcement test is carried out. The test results of elastic deflection before and after grouting and application observation show that the reinforcing and reinforcing effect is obvious and the non-excavation barrier-free reinforcement has been achieved. Good economic, technical and economic benefits have been achieved Social benefits, it is worth promoting application.