非承力导线弧垂计算及承力钢绞线的选用

Calculation of the Non-Load-Bearing Wire Sag and Selection of the Load-Bearing Steel Strand

通信光缆大幅度跨越江河通常分地下敷设、沿桥敷设和架空敷设,前2种方法由于造价高、施工难度大,又受各种条件的限制,故较难实现。因此,常用的是架空敷设跨越方式。依据架空线路弧垂计算模式,对大跨越非承力导线弧垂进行了探析,对承力钢绞线的选用具有参考意义。

The communication cables across a wide river are usually laid under the ground,along the bridge or overhead.The first two methods are difficult to achieve due to high cost,demanding construction work,or limitations of various conditions.Therefore the overhead method often remains to be feasible.This paper attempts to analyze the non-load-bearing wire sag in terms of the calculation model of the overhead line sag,which contributes to the selection of load-bearing steel strand.