電纜橋架載荷曲線(xian) 　　槽式(shi) 　　組合式(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)橋(qiao)(qiao)(qiao)(qiao)(qiao)(qiao)架(jia)(jia)(jia)(jia)(jia)(jia)(jia)的(de)(de)(de)(de)結構(gou)(gou)形式(shi)(shi) 　　桁(heng)架(jia)(jia)(jia)(jia)(jia)(jia)(jia)式(shi)(shi)梯架(jia)(jia)(jia)(jia)(jia)(jia)(jia)、大(da)跨(kua)(kua)距(ju)(ju)橋(qiao)(qiao)(qiao)(qiao)(qiao)(qiao)架(jia)(jia)(jia)(jia)(jia)(jia)(jia)的(de)(de)(de)(de)結構(gou)(gou)形式(shi)(shi) 　　1．橋(qiao)(qiao)(qiao)(qiao)(qiao)(qiao)架(jia)(jia)(jia)(jia)(jia)(jia)(jia)的(de)(de)(de)(de)選(xuan)(xuan)擇 　　1．1在(zai)(zai)工(gong)(gong)程(cheng)設(she)(she)計中，橋(qiao)(qiao)(qiao)(qiao)(qiao)(qiao)架(jia)(jia)(jia)(jia)(jia)(jia)(jia)的(de)(de)(de)(de)布(bu)(bu)置(zhi)應(ying)(ying)(ying)根據經濟合理性(xing)(xing)(xing)(xing)、技術可行(xing)性(xing)(xing)(xing)(xing)、運行(xing)安全性(xing)(xing)(xing)(xing)等(deng)(deng)因素綜合比較，以確(que)定最佳方(fang)案，還(huan)要(yao)充(chong)分(fen)滿足(zu)(zu)施工(gong)(gong)安裝、維護檢修及(ji)電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)敷(fu)(fu)(fu)設(she)(she)的(de)(de)(de)(de)要(yao)求(qiu)。 　　1．2橋(qiao)(qiao)(qiao)(qiao)(qiao)(qiao)架(jia)(jia)(jia)(jia)(jia)(jia)(jia)水平(ping)敷(fu)(fu)(fu)設(she)(she)時(shi)距(ju)(ju)地面(mian)的(de)(de)(de)(de)高(gao)度一般不(bu)(bu)(bu)(bu)(bu)(bu)低于于2.5m，垂直(zhi)敷(fu)(fu)(fu)設(she)(she)時(shi)距(ju)(ju)地面(mian)1.8m以下部分(fen)應(ying)(ying)(ying)加金(jin)屬蓋板(ban)保(bao)護，但敷(fu)(fu)(fu)設(she)(she)在(zai)(zai)電(dian)(dian)(dian)(dian)(dian)(dian)氣專(zhuan)用房(fang)間內(nei)(nei)時(shi)除外(wai)(wai)。電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)橋(qiao)(qiao)(qiao)(qiao)(qiao)(qiao)架(jia)(jia)(jia)(jia)(jia)(jia)(jia)水平(ping)敷(fu)(fu)(fu)設(she)(she)在(zai)(zai)設(she)(she)備夾層或(huo)(huo)上(shang)人馬道且低于2．5m，應(ying)(ying)(ying)采(cai)(cai)取保(bao)護接(jie)地措(cuo)施。 　　1．3橋(qiao)(qiao)(qiao)(qiao)(qiao)(qiao)架(jia)(jia)(jia)(jia)(jia)(jia)(jia)、線槽(cao)及(ji)其(qi)支吊架(jia)(jia)(jia)(jia)(jia)(jia)(jia)使(shi)用在(zai)(zai)有(you)腐蝕(shi)(shi)(shi)性(xing)(xing)(xing)(xing)環境(jing)中，應(ying)(ying)(ying)采(cai)(cai)用耐(nai)腐蝕(shi)(shi)(shi)的(de)(de)(de)(de)剛(gang)性(xing)(xing)(xing)(xing)材(cai)料制(zhi)(zhi)(zhi)造．或(huo)(huo)采(cai)(cai)取防(fang)腐蝕(shi)(shi)(shi)處理，防(fang)腐蝕(shi)(shi)(shi)處理方(fang)式(shi)(shi)應(ying)(ying)(ying)滿足(zu)(zu)工(gong)(gong)程(cheng) 　　環境(jing)和耐(nai)久性(xing)(xing)(xing)(xing)的(de)(de)(de)(de)要(yao)求(qiu)。對耐(nai)腐蝕(shi)(shi)(shi)性(xing)(xing)(xing)(xing)能要(yao)求(qiu)較高(gao)或(huo)(huo)要(yao)求(qiu)潔凈(jing)的(de)(de)(de)(de)場(chang)所(suo)，宜(yi)選(xuan)(xuan)用鋁(lv)合金(jin)電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)橋(qiao)(qiao)(qiao)(qiao)(qiao)(qiao)架(jia)(jia)(jia)(jia)(jia)(jia)(jia)。 　　1．4橋(qiao)(qiao)(qiao)(qiao)(qiao)(qiao)架(jia)(jia)(jia)(jia)(jia)(jia)(jia)在(zai)(zai)有(you)防(fang)火(huo)(huo)要(yao)求(qiu)的(de)(de)(de)(de)區(qu)段內(nei)(nei)，可在(zai)(zai)電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)梯架(jia)(jia)(jia)(jia)(jia)(jia)(jia)，托盤內(nei)(nei)添加具(ju)有(you)耐(nai)火(huo)(huo)或(huo)(huo)難(nan)燃性(xing)(xing)(xing)(xing)能的(de)(de)(de)(de)板(ban)，網等(deng)(deng)材(cai)料構(gou)(gou)成封(feng)閉或(huo)(huo)半封(feng)閉式(shi)(shi)結構(gou)(gou)，并采(cai)(cai)取在(zai)(zai) 　　橋(qiao)(qiao)(qiao)(qiao)(qiao)(qiao)架(jia)(jia)(jia)(jia)(jia)(jia)(jia)及(ji)其(qi)支吊架(jia)(jia)(jia)(jia)(jia)(jia)(jia)表(biao)面(mian)涂刷(shua)防(fang)火(huo)(huo)涂層等(deng)(deng)措(cuo)施。其(qi)整體耐(nai)火(huo)(huo)性(xing)(xing)(xing)(xing)能應(ying)(ying)(ying)滿足(zu)(zu)國家有(you)關規范或(huo)(huo)標準的(de)(de)(de)(de)要(yao)求(qiu)。在(zai)(zai)工(gong)(gong)程(cheng)防(fang)火(huo)(huo)要(yao)求(qiu)較高(gao)的(de)(de)(de)(de)場(chang)所(suo)．不(bu)(bu)(bu)(bu)(bu)(bu)宜(yi)采(cai)(cai)用鋁(lv)合金(jin)電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)橋(qiao)(qiao)(qiao)(qiao)(qiao)(qiao)架(jia)(jia)(jia)(jia)(jia)(jia)(jia)。 　　1．5需要(yao)屏蔽(bi)電(dian)(dian)(dian)(dian)(dian)(dian)磁干擾的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)線路．或(huo)(huo)有(you)防(fang)護外(wai)(wai)部影n向如(ru)戶外(wai)(wai)日照，油，腐蝕(shi)(shi)(shi)性(xing)(xing)(xing)(xing)液體、易燃粉塵等(deng)(deng)環境(jing)要(yao)求(qiu)時(shi)．應(ying)(ying)(ying)選(xuan)(xuan)用無孔托盤式(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)橋(qiao)(qiao)(qiao)(qiao)(qiao)(qiao)架(jia)(jia)(jia)(jia)(jia)(jia)(jia)。 　　1．6在(zai)(zai)容(rong)易積聚粉塵的(de)(de)(de)(de)場(chang)所(suo)，電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)橋(qiao)(qiao)(qiao)(qiao)(qiao)(qiao)架(jia)(jia)(jia)(jia)(jia)(jia)(jia)應(ying)(ying)(ying)選(xuan)(xuan)用蓋板(ban)；在(zai)(zai)公共通(tong)道或(huo)(huo)室(shi)外(wai)(wai)跨(kua)(kua)越道路段．底層橋(qiao)(qiao)(qiao)(qiao)(qiao)(qiao)架(jia)(jia)(jia)(jia)(jia)(jia)(jia)上(shang)宜(yi)加墊板(ban)或(huo)(huo)使(shi)用無孔托盤。 　　1．7不(bu)(bu)(bu)(bu)(bu)(bu)同(tong)電(dian)(dian)(dian)(dian)(dian)(dian)壓、不(bu)(bu)(bu)(bu)(bu)(bu)同(tong)用途的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)不(bu)(bu)(bu)(bu)(bu)(bu)宜(yi)敷(fu)(fu)(fu)設(she)(she)在(zai)(zai)同(tong)一層電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)橋(qiao)(qiao)(qiao)(qiao)(qiao)(qiao)架(jia)(jia)(jia)(jia)(jia)(jia)(jia)內(nei)(nei)： 　　(1)1kV以上(shang)和1kV及(ji)以下的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)： 　　(2) 同(tong)一路徑向一級負荷(he)(he)(he)供電(dian)(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)(de)雙回路電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)； 　　(3) 應(ying)(ying)(ying)急(ji)照明(ming)(ming)和其(qi)他照明(ming)(ming)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)： 　　(4)電(dian)(dian)(dian)(dian)(dian)(dian)力，控制(zhi)(zhi)(zhi)和電(dian)(dian)(dian)(dian)(dian)(dian)信電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)。 　　若(ruo)不(bu)(bu)(bu)(bu)(bu)(bu)同(tong)等(deng)(deng)級的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)敷(fu)(fu)(fu)設(she)(she)在(zai)(zai)同(tong)一電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)橋(qiao)(qiao)(qiao)(qiao)(qiao)(qiao)架(jia)(jia)(jia)(jia)(jia)(jia)(jia)時(shi)，中間應(ying)(ying)(ying)增加隔板(ban)隔離。 　　1．8當鋼制(zhi)(zhi)(zhi)直(zhi)線段長(chang)度超(chao)過(guo)30m，鋁(lv)合金(jin)電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)橋(qiao)(qiao)(qiao)(qiao)(qiao)(qiao)架(jia)(jia)(jia)(jia)(jia)(jia)(jia)超(chao)過(guo)15m時(shi)．或(huo)(huo)當電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)橋(qiao)(qiao)(qiao)(qiao)(qiao)(qiao)架(jia)(jia)(jia)(jia)(jia)(jia)(jia)經過(guo)建筑伸縮(沉降(jiang))縫時(shi)應(ying)(ying)(ying)留有(you)O-30mm補償(chang)余量．其(qi)連接(jie)宜(yi)采(cai)(cai)用伸縮連接(jie)板(ban)。 　　1．9電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)梯架(jia)(jia)(jia)(jia)(jia)(jia)(jia)、托盤寬度和高(gao)度的(de)(de)(de)(de)選(xuan)(xuan)擇應(ying)(ying)(ying)符合填(tian)充(chong)率(lv)的(de)(de)(de)(de)要(yao)求(qiu)，電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)在(zai)(zai)梯架(jia)(jia)(jia)(jia)(jia)(jia)(jia)、托盤內(nei)(nei)的(de)(de)(de)(de)填(tian)充(chong)率(lv)一般情況下，動力電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)可取40％-50％，控制(zhi)(zhi)(zhi) 　　電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)可取50％。70％．且宜(yi)預留l0％一252工(gong)(gong)程(cheng)發展(zhan)裕量。 　　1．10在(zai)(zai)選(xuan)(xuan)擇電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)橋(qiao)(qiao)(qiao)(qiao)(qiao)(qiao)架(jia)(jia)(jia)(jia)(jia)(jia)(jia)的(de)(de)(de)(de)荷(he)(he)(he)載(zai)等(deng)(deng)級時(shi)，電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)橋(qiao)(qiao)(qiao)(qiao)(qiao)(qiao)架(jia)(jia)(jia)(jia)(jia)(jia)(jia)的(de)(de)(de)(de)工(gong)(gong)作(zuo)均(jun)布(bu)(bu)荷(he)(he)(he)載(zai)不(bu)(bu)(bu)(bu)(bu)(bu)應(ying)(ying)(ying)大(da)于所(suo)選(xuan)(xuan)電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)橋(qiao)(qiao)(qiao)(qiao)(qiao)(qiao)架(jia)(jia)(jia)(jia)(jia)(jia)(jia)荷(he)(he)(he)載(zai)等(deng)(deng)級的(de)(de)(de)(de)額(e)定均(jun)布(bu)(bu)荷(he)(he)(he)載(zai)，如(ru)果電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)橋(qiao)(qiao)(qiao)(qiao)(qiao)(qiao)架(jia)(jia)(jia)(jia)(jia)(jia)(jia)的(de)(de)(de)(de)支吊架(jia)(jia)(jia)(jia)(jia)(jia)(jia)的(de)(de)(de)(de)實 　　際(ji)跨(kua)(kua)距(ju)(ju)不(bu)(bu)(bu)(bu)(bu)(bu)等(deng)(deng)于2m時(shi)．則工(gong)(gong)作(zuo)均(jun)布(bu)(bu)荷(he)(he)(he)載(zai)應(ying)(ying)(ying)滿足(zu)(zu)： 　　式(shi)(shi)中qG----工(gong)(gong)作(zuo)均(jun)布(bu)(bu)荷(he)(he)(he)載(zai)，kN／m； 　　qE----額(e)定均(jun)布(bu)(bu)荷(he)(he)(he)載(zai)，kN／m； 　　LG----實際(ji)跨(kua)(kua)距(ju)(ju)，m。 　　橋(qiao)(qiao)(qiao)(qiao)(qiao)(qiao)架(jia)(jia)(jia)(jia)(jia)(jia)(jia)的(de)(de)(de)(de)額(e)定均(jun)布(bu)(bu)荷(he)(he)(he)載(zai)等(deng)(deng)級見表(biao)1。 　　表(biao)1 鋼制(zhi)(zhi)(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)橋(qiao)(qiao)(qiao)(qiao)(qiao)(qiao)架(jia)(jia)(jia)(jia)(jia)(jia)(jia)的(de)(de)(de)(de)額(e)定均(jun)布(bu)(bu)荷(he)(he)(he)載(zai)等(deng)(deng)級載(zai)荷(he)(he)(he)等(deng)(deng)級 A B C D 額(e)定均(jun)布(bu)(bu)荷(he)(he)(he)載(zai)（kN/m） 0.5 1.5 2.0 2.5