摘要
冀东油田南堡3号构造外输管道大开挖穿越石化路6 m深淤泥带,管道挖沟时淤泥回淤快,管沟无法成型。现场施工中,采用在管沟两侧打钢板桩阻止周围淤泥向管沟涌入,同时将开挖区域附近淤泥置换成山皮石后挖沟的施工方案。当用山皮石换填深度至3 m后,因淤泥回淤太快无法继续向下换填,最终采用抛石挤淤结合强夯置换处理的方法,完成了更深层淤泥的置换,实现了管沟的开挖。
In the construction of pipeline crossing 6 m thick silt zone of Shihua Road with large excavation technique for Jidong Oilfield Nanpu 3 Block outward transportation pipeline project,the trenches can not be formed due to fast back-siltation. Hence,the construction scheme that steel sheet piles are driven along both sides of the pipeline to prevent nearby silt from flowing into trench and nearby silt is replaced by crushed rock before trenching is brought forward. But when the thickness replaced with crushed rock is greater than 3 m,the replacement can not be continued owing to fast back-siltation. Finally,the method of riprapping for packing silt combined with heavy tamping is adopted to fulfill replacement of deeper silt and the trenching work is finally completed.
出处
《石油工程建设》
2014年第6期82-83,共2页
Petroleum Engineering Construction
关键词
深淤泥地带
管道大开挖穿越
钢板桩
山皮石换填
抛石挤淤
强夯
thick silt zone
pipeline crossing with large excavation
steel sheet pile
replacement with crushed rock
riprapping for packing silt
heavy tamping
