桿旁(pang)、控制箱旁(pang)、電纜(lan)拐彎處、電纜(lan)管直線長度超過50米(mi)時或兩端電纜(lan)管不在(zai)同(tong)一平(ping)面相距(ju)100 mm以(yi)上時,必須設置手孔井。
立桿(gan)監控(kong)(kong)(kong)(kong)也叫監控(kong)(kong)(kong)(kong)桿(gan),分為八(ba)角監控(kong)(kong)(kong)(kong)桿(gan),圓管監控(kong)(kong)(kong)(kong)桿(gan),等(deng)徑(jing)監控(kong)(kong)(kong)(kong)桿(gan),變徑(jing)監控(kong)(kong)(kong)(kong)桿(gan),錐形監控(kong)(kong)(kong)(kong)桿(gan),高度一般為3-6米,主要為交(jiao)通道路(lu),十字路(lu)口,學校(xiao),政府,小區,工廠(chang),邊防(fang),機場等(deng)需要監控(kong)(kong)(kong)(kong)攝像的地方。監控(kong)(kong)(kong)(kong)立桿(gan)的使用提高了(le)城市安(an)全(quan)防(fang)范(fan),是居民(min)生活的有效(xiao)保(bao)障。
基(ji)礎5、設計(ji)依據(ju):設計(ji)風載:23m/s2,疲勞壽命:30年,按國家最新標(biao)準版本《碳素結構鋼(gang)》、《電氣裝置安裝工(gong)程(cheng)電纜線路施工(gong)及(ji)驗收(shou)規(gui)范(fan)》、《鋼(gang)結構工(gong)程(cheng)施工(gong)及(ji)驗收(shou)規(gui)范(fan)》、《鋼(gang)筋混凝(ning)土工(gong)程(cheng)施工(gong)驗收(shou)規(gui)范(fan)》等(deng)相關規(gui)范(fan)進行施工(gong)。