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在详细工程地质勘查的基础上,釆用试验分析和数值分析相结合的方法,对某高速K1302+900路段路基沉陷原因进行研究。根据研究结果,该路段路面沉降的主要原因包括:填筑土层孔隙率较大且未完成自重固结,地下水的侵蚀造成了地基承载力下降,再加上填方、挖方时工程性质不一,路面地基沉降不一和路面开裂,路面维修不及时造成雨水持续入渗加剧路基沉降等。综合考虑路面情况,选择竖向花管注浆,结合水平向花管注浆对路面病害处进行治理,达到了处治目标。
On the basis of detailed engineering geological prospecting, the reason of subsidence of a high-speed K1302 + 900 roadbed is studied with the combination of experimental analysis and numerical analysis. According to the research results, the main causes of pavement subsidence of the road section include: the porosity of reclaimed soil is large and the consolidation of self-weight is not completed; the ground bearing capacity of ground subsided due to erosion of groundwater; , Different subgrade settlement and road surface cracking, pavement maintenance is not timely caused by continued infiltration of rain intensified subgrade settlement. Considering the road conditions, choose vertical flower pipe grouting, combined with the horizontal pipe flower grouting to deal with road disease at the disposal of the target has been reached.