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在长输管道和厂区管道施工中,有时遇到30～150m跨度的中小型管道跨越工程。其跨越形式有直跨、拱跨、利用塔架组成的斜拉索管桥及悬索管桥,有的需要各种型号和直径的钢丝绳用作拖拉绳、斜拉索、悬索和防震索等。用于管道跨越的钢丝绳,在组装前都要根据张力标准进行拉伸,使钢丝绳去掉大部分张力,使组装后的钢丝绳变形量减小,达到设计要求。我们在中小型管道跨越施工中,总结出用拉力器、临时地锚、滑车组和牵引设备配套,在现场拉伸钢丝绳的方法,效果很好。
In long-distance pipeline and factory pipe construction, sometimes encounter 30 ~ 150m span of small and medium-sized pipeline spanning project. Its spanned form has straight span, arch span, the use of the tower composed of cable-stayed bridge and suspension pipe bridge, and some require various types and diameters of steel wire rope used as a tow rope, stay cables, suspension cables and shockproof cable Wait. For the pipeline spanning rope, before the assembly must be based on tensile standards for tension, the wire rope to remove most of the tension, so that the deformation of the assembly after the wire rope reduced to meet the design requirements. In the construction of small and medium-sized pipelines, we conclude that the method of drawing the steel wire rope in the field with the help of a tensioner, a temporary anchor, a pulley block and a traction device works well.