基本施(shi)工(gong)工(gong)藝
清理基礎路面→修補裂縫及接縫(舊路面)→噴灑瀝青粘層→鋪設無紡土工布(滿鋪或縫(feng)鋪)→鋪筑(zhu)瀝(li)青混凝(ning)土面層→碾壓成型。
施工(gong)技術要求
1.原有路(lu)面基(ji)礎的清理(li)
首先將(jiang)路(lu)(lu)面清掃干凈(jing),將(jiang)路(lu)(lu)面上(shang)尖銳的部(bu)分予以(yi)鏟除,對(dui)于路(lu)(lu)面嚴重(zhong)裂縫、破(po)碎(sui)處,應鏟除其破(po)碎(sui)部(bu)分,并用水混凝(ning)土或瀝(li)青混凝(ning)土找平,對(dui)局部(bu)的坑洞和(he)路(lu)(lu)面嚴重(zhong)不平(如(ru)凹(ao)處)應找平。對(dui)于舊水泥混凝(ning)土路(lu)(lu)面,如(ru)板底脫空、接縫兩側的相對(dui)位移(yi)大(da)于0.06mm時,施(shi)工前(qian)應采取灌漿或其他(ta)處治(zhi)措施(shi)。
2.裂縫或接封處理
對于(yu)路面的裂縫和預(yu)制接縫應進行處(chu)理。用高壓空氣(如鼓風機)或(huo)高壓水將(jiang)裂縫或(huo)接縫內(nei)雜物(wu)清除(chu)干凈,用瀝青、瀝青膠漿(瀝青瑪(ma)蹄脂)、填縫料等(deng)填充裂縫或(huo)接縫。
3.噴灑瀝(li)青粘層(ceng)
先灑粘(zhan)(zhan)層油(you),用量為(wei)0.5~0.6Kg/m2,再鋪設(she)無(wu)紡土(tu)工(gong)布(bu)(bu),最后再灑粘(zhan)(zhan)層油(you),用量為(wei)0.4~0.66Kg/m2噴(pen)灑瀝青的(de)橫向范圍要(yao)比無(wu)紡土(tu)工(gong)布(bu)(bu)寬5~10cm
4無紡土工布的張拉與固定
無(wu)(wu)紡土(tu)工(gong)布材料鋪(pu)筑時,應先(xian)將一(yi)端用(yong)(yong)固定(ding)(ding)器固定(ding)(ding),然后(hou)用(yong)(yong)機械或人力拉緊,張(zhang)拉伸長率宜(yi)為1.0%~1.5%,并用(yong)(yong)固定(ding)(ding)器固定(ding)(ding)另一(yi)端,無(wu)(wu)紡土(tu)工(gong)布鋪(pu)設(she)要求平整無(wu)(wu)折、皺。無(wu)(wu)紡土(tu)工(gong)布橫(heng)向應搭(da)接(jie)4~5cm,并根(gen)據攤鋪(pu)方向,將后(hou)一(yi)端壓在(zai)前一(yi)端部之下;縱向應搭(da)接(jie)4~5cm;橫(heng)向搭(da)接(jie)處(chu)應采(cai)用(yong)(yong)固定(ding)(ding)器固定(ding)(ding),縱向可以直接(jie)用(yong)(yong)粘(zhan)(zhan)層油粘(zhan)(zhan)接(jie)。
5.施工(gong)瀝青面層(ceng)
瀝(li)青面(mian)(mian)(mian)層施(shi)工(gong)方法與普通瀝(li)青路面(mian)(mian)(mian)面(mian)(mian)(mian)層施(shi)工(gong)方法一致,但應(ying)(ying)注意施(shi)工(gong)車輛(liang)不得在(zai)無紡土(tu)工(gong)布表面(mian)(mian)(mian)轉彎。在(zai)攤鋪(pu)(pu)時如出現(xian)(xian)瀝(li)青混凝(ning)土(tu)攤鋪(pu)(pu)機(ji)機(ji)輪打滑現(xian)(xian)象,應(ying)(ying)在(zai)粘(zhan)層油表面(mian)(mian)(mian)灑石屑,石屑用量為3m3/1000m2~5m3/1000m2