斜拉索组合式千斤顶张拉施工工艺

Tensioning Construction Technology of Connbined Jack for Stayed Cables

斜拉桥斜拉索张拉是工程控制的关键,由于斜拉索张拉吨位大和索塔锚固区内腔空间小等问题导致对张拉设备有特殊要求,永川长江大桥结合现场实际情况采用了组合式千斤进行斜拉索张拉施工,在半年时间内高效率高质量完成了152根斜拉索的张拉和调索工作。

The stayed cable tensioning of cable-stayed bridge is the key of engineering control.There are the special requirements for the tensioning equipment because of large tensioning tonnage of stayed cable and small inner cavity space in cable pylon anchorage zone.Combined with the practical conditions,the combined jack is used in the project of Yongchuan Changjiang Bridge for the tensioning construction of stayed cable.In a half year,the high-efficient and high-quality tensioning and cable adjusting work of 152 stayed cables is completed.