熱鍍鋅拉線三腿鋼管通信塔
拉(la)線(xian)(xian)(xian)塔(ta)是架(jia)空(kong)輸電線(xian)(xian)(xian)路的(de)支持(chi)結構,使(shi)導(dao)線(xian)(xian)(xian)對地(di)面、地(di)物滿(man)足限距要(yao)求(qiu),并(bing)能承(cheng)受導(dao)線(xian)(xian)(xian)、避(bi)雷線(xian)(xian)(xian)及(ji)(ji)本身的(de)荷(he)載及(ji)(ji)外荷(he)載。拉(la)線(xian)(xian)(xian)塔(ta)主要(yao)分為自立式和拉(la)線(xian)(xian)(xian)式兩種(zhong)類型。拉(la)線(xian)(xian)(xian)式塔(ta)受力較為合理,可靠性高(gao),塔(ta)體(ti)截(jie)面小(xiao),塔(ta)架(jia)材料(liao)用量小(xiao),但(dan)拉(la)線(xian)(xian)(xian)基礎數量多,施工(gong)工(gong)藝復雜。