1、本工法采用的移動模架結構簡單，技術易于掌握，可實施流水作業；貝雷架通用性很強，屬施工單位常備器材。當不同的箱梁混凝土重量、箱梁頂板和底板寬度及跨度變化時，通過調整貝雷架的配置片數等即可用于施工。

2、自墩(dun)頂向兩(liang)側分段(duan)(duan)懸臂施(shi)(shi)工(gong)這是(shi)大(da)跨徑橋梁(liang)掛藍施(shi)(shi)工(gong)常用(yong)(yong)的(de)(de)(de)(de)辦法(fa)，現將它運(yun)用(yong)(yong)到移(yi)動(dong)(dong)(dong)模(mo)架(jia)(jia)上來(lai)。其原理(li)是(shi)利(li)用(yong)(yong)連續梁(liang)自重(zhong)(zhong)(zhong)彎(wan)(wan)矩有兩(liang)個反(fan)彎(wan)(wan)截(jie)面的(de)(de)(de)(de)特(te)點，第(di)一次(ci)先施(shi)(shi)工(gong)墩(dun)頂約(yue)0.5L負彎(wan)(wan)矩段(duan)(duan)（A塊），要(yao)求其自重(zhong)(zhong)(zhong)產生(sheng)的(de)(de)(de)(de)彎(wan)(wan)矩小(xiao)于移(yi)動(dong)(dong)(dong)模(mo)架(jia)(jia)容許(xu)彎(wan)(wan)矩，當(dang)A段(duan)(duan)箱梁(liang)澆(jiao)注(zhu)完成達到設(she)計強(qiang)度并(bing)張拉預(yu)應力束后，A塊從移(yi)動(dong)(dong)(dong)模(mo)架(jia)(jia)上脫(tuo)開，其自重(zhong)(zhong)(zhong)所產生(sheng)的(de)(de)(de)(de)彎(wan)(wan)矩可由梁(liang)段(duan)(duan)自身所承(cheng)擔，其重(zhong)(zhong)(zhong)量(liang)通過(guo)支(zhi)座轉移(yi)到墩(dun)柱(zhu)上。第(di)二(er)次(ci)模(mo)架(jia)(jia)不移(yi)動(dong)(dong)(dong)而僅(jin)僅(jin)滑動(dong)(dong)(dong)模(mo)板澆(jiao)注(zhu)跨中（0.5L）正彎(wan)(wan)矩段(duan)(duan)（B塊），此(ci)時移(yi)動(dong)(dong)(dong)模(mo)架(jia)(jia)僅(jin)需承(cheng)擔正彎(wan)(wan)矩段(duan)(duan)（B塊）的(de)(de)(de)(de)重(zhong)(zhong)(zhong)量(liang)。很明顯分二(er)次(ci)澆(jiao)注(zhu)與一次(ci)澆(jiao)注(zhu)相比較，梁(liang)體(ti)對(dui)支(zhi)架(jia)(jia)彎(wan)(wan)矩減(jian)少四(si)倍，大(da)大(da)減(jian)少移(yi)動(dong)(dong)(dong)模(mo)架(jia)(jia)材料用(yong)(yong)量(liang)。