高填方地基改河工程关键技术难题分析

Analysis on key technical problems of high fill foundation river transformation project

为探究高填方体作为河道及堤防工程地基的适用性,本文结合元宝山露天煤矿英金河改河工程,对平均厚70.0 m、堆积时间达10年以上的砂岩弃渣和薄层砂砾石填方体进行场地稳定性、地基渗漏及渗透性、抗冲刷评价,并结合沉降变形观测工作,论证了经处理后的高填方体可作为河道及堤防工程地基,并提出了相应的处理方案及建议,可为类似工程提供一定的参考意义。

In order to explore the applicability of high fill as the foundation of river course and dike project,combined with Yingjinhe River reconstruction project of Yuanbaoshan Open-pit Coal Mine,this paper evaluates the site stability,foundation leakage and permeability,anti-erosion of sandstone waste and thin layer sand gravel fill with an average thickness of 70.0 m and a accumulation time of more than 10 years,combined with settlement deformation observation.It is proved that the treated high fill can be used as the foundation of river course and embankment engineering,and the corresponding treatment scheme and suggestions are put forward,which can provide certain reference significance for similar engineering.