曲线顶管施工质量控制

Construction quality control of curve pipe jacking

预应力钢筒混凝土JPCCP取水管道曲线下穿京杭运河及两侧堤防,顶管长度775 m,竖曲线半径8 000 m,下穿京杭运河底10.3 m。运河东侧设工作井,高邮湖侧设接收井;顶管材料为预应力钢筒混凝土,管道采用承插式钢接口,内径2.4 m,壁厚0.24 m,设计强度C50;顶管施工采用泥水平衡法,通过控制顶力、布置中继间、加强跟踪测量等技术措施,保证施工质量,一次性顶进出洞。

The jacking-prestressed concrete cylinder pipe(JPCCP)runs under the Grand Canal and the levees on both sides.The length of pipe jacking is 775 m,the radius of vertical curve is 8000m,and the length of pipe jacking is 10.3 m under the Grand Canal.There is a working well on the east side of the canal,and a receiving well on the side of Gaoyou Lake.The pipe jacking material is prestressed concrete cylinder pipe,the pipe adopts socket type steel joint,the inner diameter is 2.4 m,the wall thickness is 0.24 m,the design strength is C50;The mud-water balance method is adopted in pipe jacking construction,and the construction quality is guaranteed by strictly controlling the jacking force,scientifically arranging the relay and strengthening the tracking measurement.