根據施工(gong)(gong)(gong)地(di)點，條件(jian)不(bu)同(tong)(tong)而不(bu)同(tong)(tong)，建(jian)筑(zhu)工(gong)(gong)(gong)程須(xu)全封(feng)(feng)閉(bi)，市區主要道路或人流大的(de)(de)不(bu)得低(di)于(yu)2.5米，其余不(bu)得低(di)于(yu)1.8米，一般半(ban)封(feng)(feng)閉(bi)多見于(yu)市政工(gong)(gong)(gong)程，所謂的(de)(de)半(ban)封(feng)(feng)閉(bi)指兩面(mian)(mian)(mian)或三面(mian)(mian)(mian)設立(li)圍(wei)(wei)(wei)擋，一面(mian)(mian)(mian)或兩面(mian)(mian)(mian)開放，便于(yu)施工(gong)(gong)(gong)機具材(cai)料(liao)的(de)(de)進出(chu)。具體要怎么(me)設置根據招標(biao)文件(jian)、圖紙、現場環境，施工(gong)(gong)(gong)組織(zhi)設計在(zai)保(bao)(bao)證(zheng)(zheng)安全的(de)(de)情況下來確定。舉個(ge)例(li)子，假(jia)設市政工(gong)(gong)(gong)程在(zai)鬧市，一個(ge)道路維修(xiu)工(gong)(gong)(gong)程，半(ban)幅開放交通(tong)，半(ban)幅維修(xiu)，這(zhe)個(ge)時候就需要全封(feng)(feng)閉(bi)，保(bao)(bao)證(zheng)(zheng)不(bu)會有行人誤(wu)入而引(yin)發(fa)危險。再假(jia)設一條新建(jian)道路位于(yu)郊區，一端與老(lao)路相接(jie)，另一端為野(ye)地(di)，那么(me)只需要在(zai)新老(lao)路交接(jie)處(chu)設立(li)單面(mian)(mian)(mian)的(de)(de)圍(wei)(wei)(wei)墻和(he)一扇門即可，其余三面(mian)(mian)(mian)可以不(bu)封(feng)(feng)閉(bi)。全封(feng)(feng)閉(bi)圍(wei)(wei)(wei)擋：將(jiang)整個(ge)施工(gong)(gong)(gong)范圍(wei)(wei)(wei)用(yong)硬(ying)質材(cai)料(liao)圍(wei)(wei)(wei)起(qi)來，組成全封(feng)(feng)閉(bi)圍(wei)(wei)(wei)墻半(ban)封(feng)(feng)閉(bi)：有一面(mian)(mian)(mian)或多個(ge)面(mian)(mian)(mian)不(bu)設圍(wei)(wei)(wei)擋的(de)(de)，即為半(ban)封(feng)(feng)閉(bi)。

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