由(you)于建(jian)(jian)筑物内(nei)多(duo)种(zhong)(zhong)管线(xian)平行(xing)交叉,空间有(you)限,特别是大型写字楼(lou)、金(jin)融商厦、酒店、场馆等建(jian)(jian)筑,信息(xi)点(dian)密(mi)集,缆(lan)(lan)(lan)线(xian)敷设除(chu)了采用(yong)楼(lou)板(ban)沟槽和(he)(he)(he)墙内(nei)埋管方(fang)式外,在竖井和(he)(he)(he)屋内(nei)天棚(peng)吊顶(ding)内(nei)普遍采用(yong)电缆(lan)(lan)(lan)桥(qiao)架(jia)(jia)(jia),提供不同走向(xiang)的(de)布线(xian),弱电系统的(de)各种(zhong)(zhong)缆(lan)(lan)(lan)线(xian)分(fen)类布放(fang)在桥(qiao)架(jia)(jia)(jia)内(nei),其较佳路由(you)选(xuan)择(ze)和(he)(he)(he)安装方(fang)式要根据走向(xiang)的(de)要求(qiu),并(bing)结合建(jian)(jian)筑结构和(he)(he)(he)空调、电气等管线(xian)协商的(de)位置(zhi)(zhi)加以确定,无源缆(lan)(lan)(lan)线(xian)不能与有(you)源电缆(lan)(lan)(lan)并(bing)排铺设, 受(shou)条件所(suo)限铺放(fang)同一桥(qiao)架(jia)(jia)(jia)内(nei),其间必须采用(yong)金(jin)属隔板(ban)分(fen)设,引出的(de)缆(lan)(lan)(lan)线(xian)尽量避(bi)免平面交叉,桥(qiao)架(jia)(jia)(jia)穿越(yue)楼(lou)板(ban),墙体或伸缩缝时,应该(gai)在建(jian)(jian)筑图上标(biao)出予留相应的(de)空洞(dong)和(he)(he)(he)位置(zhi)(zhi),避(bi)免因(yin)遗漏等到施工时临时钻空,可能伤及土建(jian)(jian)结构。为了防止电磁辐射的(de)干扰(rao)(EMC)，在桥(qiao)架(jia)(jia)(jia)的(de)设计中(zhong)，应考(kao)虑桥(qiao)架(jia)(jia)(jia)的(de)封(feng)闭性。电缆(lan)(lan)(lan)桥(qiao)架(jia)(jia)(jia)可以根据不同的(de)环境和(he)(he)(he)需(xu)求(qiu)进(jin)行(xing)定制。浙江(jiang)电缆(lan)(lan)(lan)桥(qiao)架(jia)(jia)(jia)费(fei)用(yong)

统(tong)计量偏差大，通(tong)(tong)常是数(shu)(shu)量偏少(shao)。那么(me)工程(cheng)报价(jia)中(zhong)如何比较准(zhun)确地(di)统(tong)计电缆桥架(jia)的(de)(de)(de)材料呢?一(yi)般而言，托架(jia)的(de)(de)(de)直(zhi)(zhi)通(tong)(tong)部(bu)分可考虑1%~2%的(de)(de)(de)裕量，弯(wan)通(tong)(tong)部(bu)分则直(zhi)(zhi)接统(tong)计数(shu)(shu)量。桥架(jia)全(quan)长除以(yi)平(ping)均立(li)柱(zhu)间(jian)距(ju)(ju)(ju)(户外立(li)柱(zhu)跨(kua)距(ju)(ju)(ju)一(yi)般采取(qu)6m，室内立(li)柱(zhu)跨(kua)距(ju)(ju)(ju)一(yi)般采取(qu)3m)，得(de)到立(li)柱(zhu)数(shu)(shu)，增加2%~4%裕量。而桥架(jia)全(quan)长除以(yi)支吊(diao)架(jia)平(ping)均间(jian)距(ju)(ju)(ju)，得(de)到支吊(diao)架(jia)数(shu)(shu)，再考虑1%~2%裕量。至(zhi)于支吊(diao)架(jia)的(de)(de)(de)间(jian)距(ju)(ju)(ju)，户内直(zhi)(zhi)线(xian)(xian)(xian)段(duan)(duan)支吊(diao)架(jia)间(jian)距(ju)(ju)(ju)一(yi)般取(qu)1.5~3m，垂直(zhi)(zhi)安装的(de)(de)(de)支架(jia)间(jian)距(ju)(ju)(ju)不大于2m。非(fei)(fei)直(zhi)(zhi)线(xian)(xian)(xian)段(duan)(duan)的(de)(de)(de)支吊(diao)架(jia)配置应当遵守规范规定:当弯(wan)通(tong)(tong)弯(wan)曲半径小于300mm时(shi)，应在距(ju)(ju)(ju)非(fei)(fei)直(zhi)(zhi)线(xian)(xian)(xian)段(duan)(duan)与直(zhi)(zhi)线(xian)(xian)(xian)结(jie)合(he)(he)处300~600mm的(de)(de)(de)直(zhi)(zhi)线(xian)(xian)(xian)段(duan)(duan)侧设(she)(she)置一(yi)个(ge)支吊(diao)架(jia);当弯(wan)通(tong)(tong)弯(wan)曲半径不小于300mm时(shi)，除在距(ju)(ju)(ju)非(fei)(fei)直(zhi)(zhi)线(xian)(xian)(xian)段(duan)(duan)与直(zhi)(zhi)线(xian)(xian)(xian)结(jie)合(he)(he)处300~600mm的(de)(de)(de)直(zhi)(zhi)线(xian)(xian)(xian)段(duan)(duan)侧设(she)(she)置一(yi)个(ge)支吊(diao)架(jia)外，在非(fei)(fei)直(zhi)(zhi)线(xian)(xian)(xian)段(duan)(duan)中(zhong)部(bu)应增设(she)(she)一(yi)个(ge)支吊(diao)架(jia)。江苏(su)电缆桥架(jia)怎么(me)样电缆桥架(jia)可以(yi)避免电缆与其他设(she)(she)备的(de)(de)(de)干扰和交叉。

电(dian)(dian)缆(lan)桥(qiao)(qiao)架(jia)(jia)的(de)(de)荷(he)载分为荷(he)载、动荷(he)载和附加(jia)(jia)荷(he)载。静荷(he)载是指敷设在电(dian)(dian)缆(lan)桥(qiao)(qiao)架(jia)(jia)内的(de)(de)电(dian)(dian)缆(lan)种(zhong)类、根(gen)数(shu)、每根(gen)的(de)(de)外(wai)径(jing)重量/单位长度,按电(dian)(dian)缆(lan)敷设的(de)(de)不同路由分别列(lie)表统计。动荷(he)载是指电(dian)(dian)缆(lan)桥(qiao)(qiao)架(jia)(jia)安装和维(wei)护过程中施工维(wei)修人(ren)员(yuan)的(de)(de)重量。对于轻(qing)型电(dian)(dian)缆(lan)桥(qiao)(qiao)架(jia)(jia),一(yi)般不考虑动荷(he)载,即不允(yun)许在桥(qiao)(qiao)架(jia)(jia)上站(zhan)(行)人(ren),如果需要考虑站(zhan)人(ren),则应将跨距(ju)适(shi)当缩小。附加(jia)(jia)荷(he)载只在室外(wai)是指冰雪、风和电(dian)(dian)磁(ci)力所形成的(de)(de)荷(he)载,它与安装场所的(de)(de)地(di)区自(zi)然气象条件和带电(dian)(dian)体的(de)(de)性质有(you)关,设计中应根(gen)据各种(zhong)条件加(jia)(jia)以计算。

一(yi)般情(qing)况(kuang)下，控(kong)制(zhi)(zhi)(zhi)电(dian)(dian)(dian)缆(lan)在(zai)桥(qiao)(qiao)(qiao)(qiao)架(jia)(jia)(jia)内既可以(yi)(yi)水(shui)平排列，也可以(yi)(yi)堆放。以(yi)(yi)其桥(qiao)(qiao)(qiao)(qiao)架(jia)(jia)(jia)内控(kong)制(zhi)(zhi)(zhi)电(dian)(dian)(dian)缆(lan)总截面s不超(chao)过电(dian)(dian)(dian)缆(lan)桥(qiao)(qiao)(qiao)(qiao)架(jia)(jia)(jia)总截面s。的(de)(de)(de)40%为原则。控(kong)制(zhi)(zhi)(zhi)电(dian)(dian)(dian)缆(lan)的(de)(de)(de)总截面s为:其中(zhong):s1、s2、s3……为桥(qiao)(qiao)(qiao)(qiao)架(jia)(jia)(jia)内各(ge)种(zhong)控(kong)制(zhi)(zhi)(zhi)电(dian)(dian)(dian)缆(lan)的(de)(de)(de)截面积(ji)(包(bao)括(kuo)护层(ceng)部分)单(dan)位为mm，d3……为桥(qiao)(qiao)(qiao)(qiao)架(jia)(jia)(jia)内各(ge)种(zhong)控(kong)制(zhi)(zhi)(zhi)电(dian)(dian)(dian)缆(lan)的(de)(de)(de)外径，单(dan)位为mm;nnn……为上述同(tong)种(zhong)型号规格电(dian)(dian)(dian)缆(lan)的(de)(de)(de)根(gen)(gen)数。相应(ying)(ying)(ying)的(de)(de)(de)控(kong)制(zhi)(zhi)(zhi)电(dian)(dian)(dian)缆(lan)桥(qiao)(qiao)(qiao)(qiao)架(jia)(jia)(jia)的(de)(de)(de)宽度(du)为b:式中(zhong)h为电(dian)(dian)(dian)缆(lan)桥(qiao)(qiao)(qiao)(qiao)架(jia)(jia)(jia)的(de)(de)(de)高(gao)度(du)，单(dan)位为mm。当(dang)电(dian)(dian)(dian)缆(lan)桥(qiao)(qiao)(qiao)(qiao)架(jia)(jia)(jia)在(zai)室内安装时，为保证桥(qiao)(qiao)(qiao)(qiao)架(jia)(jia)(jia)平直美观，整齐一(yi)致，它的(de)(de)(de)水(shui)平方向载荷(he)形(xing)变一(yi)般应(ying)(ying)(ying)控(kong)制(zhi)(zhi)(zhi)在(zai)4.0mm以(yi)(yi)内。根(gen)(gen)据所(suo)选取的(de)(de)(de)电(dian)(dian)(dian)缆(lan)桥(qiao)(qiao)(qiao)(qiao)架(jia)(jia)(jia)宽度(du)和所(suo)要求(qiu)的(de)(de)(de)桥(qiao)(qiao)(qiao)(qiao)架(jia)(jia)(jia)水(shui)平方向载荷(he)形(xing)变的(de)(de)(de)大小，查对相应(ying)(ying)(ying)结(jie)构形(xing)式的(de)(de)(de)桥(qiao)(qiao)(qiao)(qiao)架(jia)(jia)(jia)载荷(he)特性(xing)曲线，当(dang)不能(neng)满足形(xing)变要求(qiu)时，可以(yi)(yi)适(shi)当(dang)增大桥(qiao)(qiao)(qiao)(qiao)架(jia)(jia)(jia)侧高(gao)或者减(jian)小支撑间距，以(yi)(yi)便满足要求(qiu)。电(dian)(dian)(dian)缆(lan)桥(qiao)(qiao)(qiao)(qiao)架(jia)(jia)(jia)可以(yi)(yi)根(gen)(gen)据需要进行不同(tong)形(xing)状和尺寸(cun)的(de)(de)(de)设计(ji)，以(yi)(yi)适(shi)应(ying)(ying)(ying)不同(tong)的(de)(de)(de)布线空(kong)间。

根(gen)据(ju)规(gui)范的(de)(de)(de)有关规(gui)定,镀锌(xin)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)缆(lan)(lan)(lan)桥(qiao)(qiao)(qiao)架进行良好的(de)(de)(de)接(jie)(jie)地(di)。(1)镀锌(xin)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)缆(lan)(lan)(lan)桥(qiao)(qiao)(qiao)架直接(jie)(jie)板每(mei)个固定螺栓(shuan)接(jie)(jie)触电(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)应小于0.005Ω,此时电(dian)(dian)(dian)(dian)(dian)(dian)(dian)缆(lan)(lan)(lan)桥(qiao)(qiao)(qiao)架可作(zuo)为(wei)接(jie)(jie)地(di)干(gan)线(xian)(xian)(喷粉(fen)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)缆(lan)(lan)(lan)桥(qiao)(qiao)(qiao)架不(bu)(bu)宜作(zuo)接(jie)(jie)地(di)干(gan)线(xian)(xian)),每(mei)个电(dian)(dian)(dian)(dian)(dian)(dian)(dian)缆(lan)(lan)(lan)桥(qiao)(qiao)(qiao)架的(de)(de)(de)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)值(zhi)(zhi)(zhi)可按下式(shi)(shi)计算(suan):r=ρ·L/S式(shi)(shi)中:ρ =15×10Ω-6 / cm(20℃);L=长(zhang)度按100mm计算(suan);S=截面积cm2。(2)梯架于托盘(pan)的(de)(de)(de)单(dan)位电(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)值(zhi)(zhi)(zhi)见表2。表2 梯架于托盘(pan)的(de)(de)(de)单(dan)位电(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)值(zhi)(zhi)(zhi)(3)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)缆(lan)(lan)(lan)槽的(de)(de)(de)单(dan)位电(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)值(zhi)(zhi)(zhi)见表3(4)当电(dian)(dian)(dian)(dian)(dian)(dian)(dian)缆(lan)(lan)(lan)桥(qiao)(qiao)(qiao)架安装连(lian)接(jie)(jie)程(cheng)整体后,每(mei)根(gen)梯边(或每(mei)个电(dian)(dian)(dian)(dian)(dian)(dian)(dian)缆(lan)(lan)(lan)槽)的(de)(de)(de)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)为(wei):R=L(r+1/3r')式(shi)(shi)中:R--梯边，即(电(dian)(dian)(dian)(dian)(dian)(dian)(dian)缆(lan)(lan)(lan)槽)全长(zhang)总电(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(mΩ);r--梯边单(dan)位长(zhang)度电(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(mΩ/m)r'--直接(jie)(jie)板固定螺栓(shuan)接(jie)(jie)触电(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)。电(dian)(dian)(dian)(dian)(dian)(dian)(dian)缆(lan)(lan)(lan)桥(qiao)(qiao)(qiao)架可以根(gen)据(ju)需要进行不(bu)(bu)同形式(shi)(shi)的(de)(de)(de)隔离处理，以防(fang)止(zhi)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)缆(lan)(lan)(lan)之(zhi)间(jian)的(de)(de)(de)相(xiang)互干(gan)扰。浙江电(dian)(dian)(dian)(dian)(dian)(dian)(dian)缆(lan)(lan)(lan)桥(qiao)(qiao)(qiao)架费用(yong)

电(dian)(dian)缆桥架可以有效地减少电(dian)(dian)缆敷设(she)的损耗和浪费(fei)。浙江(jiang)电(dian)(dian)缆桥架费(fei)用

性能(neng)(neng)(neng)：承(cheng)载(zai)能(neng)(neng)(neng)力(li)：电缆(lan)桥(qiao)(qiao)(qiao)架(jia)采用(yong)优良钢材制作，具有(you)(you)很强的(de)承(cheng)载(zai)能(neng)(neng)(neng)力(li)。不(bu)(bu)同规格的(de)电缆(lan)桥(qiao)(qiao)(qiao)架(jia)能(neng)(neng)(neng)够(gou)承(cheng)载(zai)不(bu)(bu)同重量的(de)电缆(lan)和光缆(lan)。防腐(fu)性能(neng)(neng)(neng)：电缆(lan)桥(qiao)(qiao)(qiao)架(jia)采用(yong)电镀锌、喷塑(su)等表面(mian)处理(li)技术(shu)，具有(you)(you)很好(hao)的(de)防腐(fu)蚀性能(neng)(neng)(neng)。即使(shi)在潮湿的(de)环(huan)境(jing)下长(zhang)期使(shi)用(yong)，也(ye)(ye)不(bu)(bu)会生锈腐(fu)蚀。耐(nai)热(re)(re)性能(neng)(neng)(neng)：电缆(lan)桥(qiao)(qiao)(qiao)架(jia)能(neng)(neng)(neng)够(gou)耐(nai)受高温环(huan)境(jing)，适(shi)合在高温环(huan)境(jing)下使(shi)用(yong)。耐(nai)寒性能(neng)(neng)(neng)：电缆(lan)桥(qiao)(qiao)(qiao)架(jia)也(ye)(ye)能(neng)(neng)(neng)够(gou)适(shi)应寒冷环(huan)境(jing)，不(bu)(bu)会出(chu)现(xian)裂纹等情(qing)况。防火(huo)(huo)(huo)性能(neng)(neng)(neng)：电缆(lan)桥(qiao)(qiao)(qiao)架(jia)具有(you)(you)很好(hao)的(de)防火(huo)(huo)(huo)性能(neng)(neng)(neng)，即使(shi)在火(huo)(huo)(huo)灾发(fa)生时，也(ye)(ye)能(neng)(neng)(neng)够(gou)保护(hu)电缆(lan)和光缆(lan)不(bu)(bu)受热(re)(re)损伤(shang)。浙江电缆(lan)桥(qiao)(qiao)(qiao)架(jia)费用(yong)

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