关键词: 引张线, 浮托, 测点间距, 浮船尺寸, 钢丝直径

Abstract: Tension wire alignment is commonly used in monitoring of horizontal displacement in the upstream and downstream direction of linear concrete gravity dams. The floating vessel should match with wire diameter and the distance between measuring points, or the size of floating vessels should be specifically designed. Otherwise, deflection and large draught of the floating vessel may cause system error of the tension wire alignment. For the case as the distance between measuring points is 35 m, the forces on the floating vessel are analysed, and accordingly, the vessel size is enlarged. On-site test on the accuracy of the measured values shows that it can meet the error requirements of the specifications.

Key words: tension wire alignment, float, distance between measuring points, size of floating vessel,  , wire diameter