根據施(shi)(shi)工(gong)(gong)(gong)地(di)點，條件(jian)不(bu)(bu)同(tong)而(er)不(bu)(bu)同(tong)，建(jian)筑工(gong)(gong)(gong)程(cheng)(cheng)須全封(feng)(feng)(feng)閉(bi)(bi)(bi)(bi)，市區主要(yao)(yao)(yao)道路(lu)或(huo)人流大(da)的(de)不(bu)(bu)得(de)低于2.5米(mi)，其余不(bu)(bu)得(de)低于1.8米(mi)，一(yi)(yi)般(ban)半(ban)(ban)(ban)封(feng)(feng)(feng)閉(bi)(bi)(bi)(bi)多見于市政(zheng)工(gong)(gong)(gong)程(cheng)(cheng)，所謂的(de)半(ban)(ban)(ban)封(feng)(feng)(feng)閉(bi)(bi)(bi)(bi)指(zhi)兩(liang)面(mian)(mian)或(huo)三面(mian)(mian)設立(li)(li)圍(wei)(wei)擋(dang)，一(yi)(yi)面(mian)(mian)或(huo)兩(liang)面(mian)(mian)開(kai)放，便(bian)于施(shi)(shi)工(gong)(gong)(gong)機具(ju)材料的(de)進(jin)出。具(ju)體要(yao)(yao)(yao)怎么設置根據招標文件(jian)、圖紙、現場環境，施(shi)(shi)工(gong)(gong)(gong)組織設計在(zai)保證安全的(de)情況下來(lai)確定。舉個(ge)例(li)子，假設市政(zheng)工(gong)(gong)(gong)程(cheng)(cheng)在(zai)鬧市，一(yi)(yi)個(ge)道路(lu)維(wei)修工(gong)(gong)(gong)程(cheng)(cheng)，半(ban)(ban)(ban)幅(fu)開(kai)放交(jiao)通(tong)，半(ban)(ban)(ban)幅(fu)維(wei)修，這個(ge)時候就需(xu)要(yao)(yao)(yao)全封(feng)(feng)(feng)閉(bi)(bi)(bi)(bi)，保證不(bu)(bu)會有行人誤入而(er)引發(fa)危險(xian)。再假設一(yi)(yi)條新建(jian)道路(lu)位于郊區，一(yi)(yi)端與老路(lu)相接，另一(yi)(yi)端為野地(di)，那么只(zhi)需(xu)要(yao)(yao)(yao)在(zai)新老路(lu)交(jiao)接處設立(li)(li)單面(mian)(mian)的(de)圍(wei)(wei)墻(qiang)和一(yi)(yi)扇門即可，其余三面(mian)(mian)可以不(bu)(bu)封(feng)(feng)(feng)閉(bi)(bi)(bi)(bi)。全封(feng)(feng)(feng)閉(bi)(bi)(bi)(bi)圍(wei)(wei)擋(dang)：將整(zheng)個(ge)施(shi)(shi)工(gong)(gong)(gong)范圍(wei)(wei)用硬質材料圍(wei)(wei)起來(lai)，組成全封(feng)(feng)(feng)閉(bi)(bi)(bi)(bi)圍(wei)(wei)墻(qiang)半(ban)(ban)(ban)封(feng)(feng)(feng)閉(bi)(bi)(bi)(bi)：有一(yi)(yi)面(mian)(mian)或(huo)多個(ge)面(mian)(mian)不(bu)(bu)設圍(wei)(wei)擋(dang)的(de)，即為半(ban)(ban)(ban)封(feng)(feng)(feng)閉(bi)(bi)(bi)(bi)。

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