PBA暗挖地铁车站拱部全断面深孔注浆技术

Deep-hole grouting technology of arch full section in PSB subsurface excavation of metro station

玉渊潭东门站位于国宾道三里河路下方,拱顶埋深较浅,覆土厚度11.31m,处于砂卵石地层中,受扰动宜坍塌。临近穿越重要市政管线等一级风险源、为确保国宾道及市政管线安全,采取拱部全断面深孔注浆进行超前预加固,并配合及时的背后回填注浆,确保了暗挖施工顺利进行,保证了路面及管线的稳定与安全。

Yuyantan station is located below the Sanlihe street.The vault of it is more shallow-, and the thickness of covering soil is 11.31m.Due to be in sand and gravel stratum,the vault could be prone to collapse.Because that the metro station is near important municipal pipelines and the primary risk sources,it had employed pre reinforcement by deep-hole grouting technology of arc full section in combination with backwall grouting for the guarantee of smooth construction and the safety of pavement and pipelines.