根據施工(gong)(gong)(gong)地點，條件不同(tong)而(er)不同(tong)，建(jian)筑工(gong)(gong)(gong)程(cheng)須全(quan)(quan)封(feng)(feng)(feng)(feng)閉(bi)(bi)，市(shi)區(qu)主(zhu)要(yao)道路(lu)或人流大(da)的(de)(de)不得低于2.5米，其(qi)余不得低于1.8米，一(yi)般半(ban)(ban)封(feng)(feng)(feng)(feng)閉(bi)(bi)多見于市(shi)政工(gong)(gong)(gong)程(cheng)，所(suo)謂的(de)(de)半(ban)(ban)封(feng)(feng)(feng)(feng)閉(bi)(bi)指兩面(mian)(mian)(mian)或三面(mian)(mian)(mian)設(she)立圍擋，一(yi)面(mian)(mian)(mian)或兩面(mian)(mian)(mian)開放，便(bian)于施工(gong)(gong)(gong)機具(ju)材(cai)料(liao)的(de)(de)進出。具(ju)體要(yao)怎么設(she)置根據招標文(wen)件、圖紙(zhi)、現場環境(jing)，施工(gong)(gong)(gong)組(zu)織設(she)計(ji)在(zai)保(bao)證安全(quan)(quan)的(de)(de)情況下(xia)來確定。舉(ju)個(ge)例子，假(jia)設(she)市(shi)政工(gong)(gong)(gong)程(cheng)在(zai)鬧(nao)市(shi)，一(yi)個(ge)道路(lu)維修(xiu)工(gong)(gong)(gong)程(cheng)，半(ban)(ban)幅開放交(jiao)通，半(ban)(ban)幅維修(xiu)，這個(ge)時候就需要(yao)全(quan)(quan)封(feng)(feng)(feng)(feng)閉(bi)(bi)，保(bao)證不會有行人誤(wu)入而(er)引發危險。再假(jia)設(she)一(yi)條新(xin)建(jian)道路(lu)位(wei)于郊區(qu)，一(yi)端與(yu)老(lao)路(lu)相(xiang)接，另一(yi)端為(wei)野地，那么只需要(yao)在(zai)新(xin)老(lao)路(lu)交(jiao)接處設(she)立單面(mian)(mian)(mian)的(de)(de)圍墻和一(yi)扇門即(ji)(ji)可(ke)，其(qi)余三面(mian)(mian)(mian)可(ke)以不封(feng)(feng)(feng)(feng)閉(bi)(bi)。全(quan)(quan)封(feng)(feng)(feng)(feng)閉(bi)(bi)圍擋：將整(zheng)個(ge)施工(gong)(gong)(gong)范(fan)圍用硬質材(cai)料(liao)圍起來，組(zu)成全(quan)(quan)封(feng)(feng)(feng)(feng)閉(bi)(bi)圍墻半(ban)(ban)封(feng)(feng)(feng)(feng)閉(bi)(bi)：有一(yi)面(mian)(mian)(mian)或多個(ge)面(mian)(mian)(mian)不設(she)圍擋的(de)(de)，即(ji)(ji)為(wei)半(ban)(ban)封(feng)(feng)(feng)(feng)閉(bi)(bi)。

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