熱鍍鋅拉線三腿鋼管通信塔
拉線(xian)(xian)(xian)(xian)(xian)塔(ta)是架(jia)空輸電線(xian)(xian)(xian)(xian)(xian)路的支持結構,使(shi)導(dao)線(xian)(xian)(xian)(xian)(xian)對地面、地物(wu)滿足限距要(yao)求,并能承(cheng)受(shou)導(dao)線(xian)(xian)(xian)(xian)(xian)、避雷線(xian)(xian)(xian)(xian)(xian)及本(ben)身的荷(he)載(zai)(zai)及外(wai)荷(he)載(zai)(zai)。拉線(xian)(xian)(xian)(xian)(xian)塔(ta)主(zhu)要(yao)分為自立式和拉線(xian)(xian)(xian)(xian)(xian)式兩種類(lei)型。拉線(xian)(xian)(xian)(xian)(xian)式塔(ta)受(shou)力(li)較為合理(li),可靠(kao)性高,塔(ta)體(ti)截面小,塔(ta)架(jia)材料用量小,但(dan)拉線(xian)(xian)(xian)(xian)(xian)基礎數量多(duo),施工(gong)工(gong)藝復雜。