三峡库区秭归县城新址回填风化砂工程性状研究

Engineering properties of backfilling weathered sandstone in new site for Zigui County resettlement in Three Gorges Reservoir Area

秭归县城迁建新址在进行场地平整时形成大面积的花岗岩风化砂回填地基,为解决风化砂回填地基的稳定性问题,对回填砂的工程特征进行了研究。研究内容包括回填砂的密实度、均匀性、承载力、变形特性、湿陷性、渗透稳定性等。采用现场与室内多种方法的对比试验研究,对回填砂的工程性状作了深入、系统的分析评价,提出了相应的物理力学指标,为确定回填砂地基处理方案和渗透变形防治方案提供了依据。

In ground leveling of the new site for Zigui County resettlement,a large area of granite weathered sandstone backfilling foundation formed. To solve the stability problem of the backfilled foundation,the engineering properties of the backfilling sandstone was studied,including its compactness,homogeneity,bearing capacity,deformation,collapsibility,seepage stability and so on. Through field and laboratory comparative tests,an in- depth and systematic study on the engineering properties of the backfilling sandstone was carried out and its related physical and mechanical indicators were put forward,providing reference for the foundation treatment scheme and seepage deformation control scheme formation.