根(gen)據施工(gong)(gong)(gong)(gong)地(di)點(dian)，條件(jian)不(bu)同(tong)而不(bu)同(tong)，建(jian)筑工(gong)(gong)(gong)(gong)程(cheng)須(xu)全(quan)(quan)(quan)封(feng)(feng)(feng)閉(bi)(bi)，市區主要(yao)道路或人流大的(de)不(bu)得低于(yu)(yu)2.5米，其(qi)余不(bu)得低于(yu)(yu)1.8米，一(yi)(yi)般半(ban)封(feng)(feng)(feng)閉(bi)(bi)多(duo)見于(yu)(yu)市政工(gong)(gong)(gong)(gong)程(cheng)，所謂(wei)的(de)半(ban)封(feng)(feng)(feng)閉(bi)(bi)指兩(liang)面(mian)或三面(mian)設(she)(she)立(li)圍擋，一(yi)(yi)面(mian)或兩(liang)面(mian)開放，便于(yu)(yu)施工(gong)(gong)(gong)(gong)機具材料(liao)的(de)進出(chu)。具體(ti)要(yao)怎么設(she)(she)置根(gen)據招標文件(jian)、圖紙、現場環(huan)境，施工(gong)(gong)(gong)(gong)組織設(she)(she)計在(zai)保證安全(quan)(quan)(quan)的(de)情況下(xia)來確定。舉個(ge)例子，假設(she)(she)市政工(gong)(gong)(gong)(gong)程(cheng)在(zai)鬧市，一(yi)(yi)個(ge)道路維(wei)修(xiu)工(gong)(gong)(gong)(gong)程(cheng)，半(ban)幅(fu)(fu)開放交(jiao)通，半(ban)幅(fu)(fu)維(wei)修(xiu)，這個(ge)時候就需要(yao)全(quan)(quan)(quan)封(feng)(feng)(feng)閉(bi)(bi)，保證不(bu)會有(you)行人誤入而引發危險(xian)。再假設(she)(she)一(yi)(yi)條新建(jian)道路位于(yu)(yu)郊區，一(yi)(yi)端(duan)與老路相接，另(ling)一(yi)(yi)端(duan)為野(ye)地(di)，那么只需要(yao)在(zai)新老路交(jiao)接處設(she)(she)立(li)單面(mian)的(de)圍墻和一(yi)(yi)扇門即(ji)(ji)可，其(qi)余三面(mian)可以不(bu)封(feng)(feng)(feng)閉(bi)(bi)。全(quan)(quan)(quan)封(feng)(feng)(feng)閉(bi)(bi)圍擋：將(jiang)整個(ge)施工(gong)(gong)(gong)(gong)范圍用硬質材料(liao)圍起(qi)來，組成全(quan)(quan)(quan)封(feng)(feng)(feng)閉(bi)(bi)圍墻半(ban)封(feng)(feng)(feng)閉(bi)(bi)：有(you)一(yi)(yi)面(mian)或多(duo)個(ge)面(mian)不(bu)設(she)(she)圍擋的(de)，即(ji)(ji)為半(ban)封(feng)(feng)(feng)閉(bi)(bi)。

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