超长无浮托式引张线技术研究

Research on Super Long Non-floating Attachment Tension Wire Alignment

在直线型或折线型大坝廊道内,常布置引张线来监测坝体的水平变形,传统引张线线体采用0.8-1.2mm钢丝,并产生较大的垂度,需用浮托装置托起,影响线体的灵敏度。目前采用新型的DPRP线体材料,线密度虽只有钢丝的1/5,但抗拉强度比钢丝大,已在大坝的引张线技术改造中使用。从无浮托引张线悬链方程着手,分别分析了线体的最大垂度和受拉变形与引张线长度、挂锤重量的关系、环境温度和风力因素对线体的影响等。

In porch path of the linetype or broken linetype dam Tension Wire Alignment to monitor the level deformation of the dam body is often arranged, The traditional Tension Wire Alignment body uses steel wire of the diameter 0. 8 1.2 mm, and generates bigger sag, Floating attachment to float steel wire is used,to reduce the sensibility of the line body. A kind of new material of DPRP line body is used currently, its specific density of line is 1/5 of the steel wire, the tensile strength is also bigger than the steel wire. It is already used in renovation of tension wire alignment. The paper starts with the equation of the Non-floating Attachment Tension Wire Alignment. The problems such as biggest sag and length of the line body are discussed, and the line body is subjected to the influence of some factors, such as the pull de- formation and environment…, etc.