三峡工程临时船闸坝体横缝渗漏灌浆处理

三峡工程临时船闸位于左岸非溢流坝8、9号坝段之间,在三峡二期工程施工期间承担临时通航任务.临时船闸1、3号坝段先修建并分两期施工,初期在临时船闸通航前浇筑至高程143 m.二期工程完成后,将临时船闸通航航道封堵,修建临时船闸2号坝段,设置冲沙闸,并将临时船闸1、3号坝段自高程143 m浇至坝顶185.0 m.通过对三峡工程临时船闸坝体横缝止水检查,发现有4条排水槽压水串漏量超标及上游缝面存在外漏,根据设计要求,需要对检查不合格的横缝进行化学灌浆处理.对压水检查、渗漏处理方案决策及处理施工进行了阐述.

Grouting treatment for transverse joint seepage of TGP temporary shiplock

TGP temporary shiplock is located between the No.8 and No.9 monoliths of left bank non-overflow dam section and undertakes temporary navigation task during Stage II works construction of TGP.No.1 and No.3 monoliths of the temporary shiplock was constructed in advance and in two stages to El.143 m before the temporary shiplock operation.After completion of Stage II works,the navigation channel of the temporary shiplock was blocked to construct No.2 monoliths of the temporary shiplock and flushing sluice,and placing No.1 and No.3 monoliths from El.143 m to dam top elevation of 185.0 m.Through checking for water stop between transversal joints of the temporary shiplock,it was discovered that the water leakage volume of 4 water drainage troughs exceeds standard and there exists outward-leakage of upstream joint face.According to design requirement,chemical grouting treatment should be carried out for unqualified transversal joints.This paper presents water pressure check,leakage treatment and construction scheme.