人工挖孔桩施工中遭遇流砂层的处理实践

在铁路及高速公路建设处理滑坡地质灾害中,抗滑桩是比较常见且较为有效的工程措施。文章针对挖孔桩施工中遇到流砂层,出现的流砂、涌砂现象,采用钢筋超前支护及旋喷桩技术形成隔水帷幕,成功地阻止了砂层的流失,解决了施工进度慢、不安全的难题,改善了桩周的边界条件,提高了抗滑桩的承载能力。

Practice of treating the flowing sand stratum during the construction of artificial digging piles

Using the anti-slide pile is a common practice to use and efective engineering measures for treating the geolog- ical disasters,such as slide,in the construction of railway or highway.In the light of the phenomenon such as flowing sand,and sand boil subjected from the flowing sand stratum,in the construction of artificial digging piles,the advanced support with rein- foreement and the chemical churning pile technology can be used to form the watertight curtain,thereby preventing successfully the loss of sand stratum,solving a difficult problem with the of slower progress and construction safety,improving the boundary conditions of pile surroundings,and improving the boating capacity of anti-slide piles.