大成桥高架桥桩基施工

Construction of Pile foundations of Dacheng Viaduct

大成桥高架桥位于宁横公路三标段灰岩区 ,岩溶发育 ,地面塌陷严重。综合现场工程地质条件 ,提出了在采用人工挖孔桩的方案 ,由于采用了特殊处理措施 ,取得了较大的成功。其中最深的人工挖孔桩达 70 .8m 。

Dacheng viaduct in Ningxiang,Hunan province landed in limestone area with developed Karst and cave-in the surface. Considered the engineering geology condition, a project of hand-dug piles was presented, which was successful through several kinds of special treatment. Among of these, the most length of hand-dug pile was 70.8 meter .So long a pile like this was infrequent in our country.