如何操作壓路機做好瀝青路面的碾壓作業

瀝青混凝(ning)土結構層的(de)壓(ya)實度(du)和平整度(du)取決于碾壓(ya)時的(de)溫度(du)和壓(ya)實方(fang)法,按照緊(jin)(jin)跟、慢壓(ya)、高頻(pin)、低幅的(de)原則進行碾壓(ya)。壓(ya)路機緊(jin)(jin)跟在攤鋪機后面碾壓(ya),在終(zhong)壓(ya)前消除全部輪跡,達到要求的(de)壓(ya)實度(du)后立即停止作(zuo)業,以免過(guo)振(zhen)。由現場(chang)專職測試溫度(du)人員指揮(hui)控制碾壓(ya)時間和地(di)點。

碾(nian)壓(ya)(ya)(ya)(ya)(ya)按照(zhao)由上(shang)而下、先(xian)(xian)靜(jing)后(hou)(hou)振(zhen)、先(xian)(xian)慢(man)后(hou)(hou)快的(de)原則進行,盡量長(chang)距離碾(nian)壓(ya)(ya)(ya)(ya)(ya),振(zhen)壓(ya)(ya)(ya)(ya)(ya)時保證先(xian)(xian)停(ting)振(zhen)后(hou)(hou)停(ting)機(ji)(ji),先(xian)(xian)起(qi)步(bu)后(hou)(hou)起(qi)振(zhen)。碾(nian)壓(ya)(ya)(ya)(ya)(ya)時,相(xiang)鄰碾(nian)壓(ya)(ya)(ya)(ya)(ya)帶重疊1/3～1/2輪寬,從橫斷面上(shang)低的(de)一(yi)側逐步(bu)移向(xiang)高的(de)一(yi)側,壓(ya)(ya)(ya)(ya)(ya)路機(ji)(ji)來回一(yi)次(ci)為(wei)一(yi)遍。壓(ya)(ya)(ya)(ya)(ya)路機(ji)(ji)碾(nian)壓(ya)(ya)(ya)(ya)(ya)時,離攤鋪機(ji)(ji)方向(xiang)不(bu)在同一(yi)斷面上(shang),而是呈階梯形,每次(ci)前后(hou)(hou)錯開50cm左右,并且先(xian)(xian)長(chang)后(hou)(hou)短(duan),即(ji)第一(yi)次(ci)碾(nian)壓(ya)(ya)(ya)(ya)(ya)距離長(chang),其余各(ge)次(ci)逐漸縮短(duan)。碾(nian)壓(ya)(ya)(ya)(ya)(ya)時,調整好壓(ya)(ya)(ya)(ya)(ya)路面碾(nian)壓(ya)(ya)(ya)(ya)(ya)輪灑水噴嘴,使其灑水適(shi)量,以不(bu)粘輪為(wei)宜。壓(ya)(ya)(ya)(ya)(ya)路機(ji)(ji)禁止在未碾(nian)壓(ya)(ya)(ya)(ya)(ya)成型或未冷卻的(de)路段(duan)上(shang)轉向(xiang)、制動或停(ting)留。在壓(ya)(ya)(ya)(ya)(ya)路機(ji)(ji)壓(ya)(ya)(ya)(ya)(ya)不(bu)到的(de)地方,采用振(zhen)動夯板(ban)來壓(ya)(ya)(ya)(ya)(ya)實。

一、初壓:

要在溫度大(da)于(yu)150℃進行(xing),先用鋼(gang)輪(lun)壓(ya)(ya)路(lu)機靜壓(ya)(ya)1～2遍,速度控制在1.5km/h～2km/h。碾(nian)壓(ya)(ya)時(shi),驅(qu)動輪(lun)面向(xiang)攤鋪機,碾(nian)壓(ya)(ya)坡道時(shi),驅(qu)動輪(lun)在低(di)處。

二、復壓:

初壓(ya)完后即刻進行(xing)復(fu)壓(ya),復(fu)壓(ya)溫(wen)度不低(di)于125℃,先用重型雙鋼(gang)輪(lun)壓(ya)路機振(zhen)動(dong)碾壓(ya)4遍,碾壓(ya)速度4km/h～5km/h,然后用重型輪(lun)胎(tai)壓(ya)路機碾壓(ya)6遍,復(fu)壓(ya)速度為3.5km/h～4.5km/h。視壓(ya)實情況,碾壓(ya)遍數(shu)增加1～2遍。

三、終壓:

緊接復(fu)壓(ya)后進行,采用雙(shuang)鋼輪振動(dong)壓(ya)路機,關閉振動(dong),速度(du)控制在2km/h ~3km/h靜(jing)壓(ya)2遍,使路面無輪跡為(wei)止,終壓(ya)完成時,溫度(du)不低于(yu)110℃。

接(jie)(jie)縫(feng)(feng)(feng)(feng)(feng)處(chu)理也很重要。施(shi)工(gong)(gong)(gong)(gong)安(an)排時(shi)將力爭(zheng)使按縫(feng)(feng)(feng)(feng)(feng)的(de)數量減到最少,橫(heng)向施(shi)工(gong)(gong)(gong)(gong)接(jie)(jie)縫(feng)(feng)(feng)(feng)(feng)均采用垂直(zhi)(zhi)(zhi)的(de)平接(jie)(jie)縫(feng)(feng)(feng)(feng)(feng),并使各(ge)層(ceng)(ceng)之間(jian)的(de)橫(heng)縫(feng)(feng)(feng)(feng)(feng)錯開。在(zai)(zai)施(shi)工(gong)(gong)(gong)(gong)結(jie)束時(shi),攤(tan)(tan)鋪機在(zai)(zai)接(jie)(jie)近端部前10cm處(chu)將熨(yun)平板稍稍抬(tai)起駛離現(xian)場,用切(qie)割(ge)機垂直(zhi)(zhi)(zhi)切(qie)除端部層(ceng)(ceng)厚不足(zu)部分,使下(xia)(xia)次施(shi)工(gong)(gong)(gong)(gong)時(shi)成直(zhi)(zhi)(zhi)角連(lian)接(jie)(jie)。在(zai)(zai)下(xia)(xia)次施(shi)工(gong)(gong)(gong)(gong)前,對(dui)橫(heng)縫(feng)(feng)(feng)(feng)(feng)處(chu)刷乳化瀝青,并用攤(tan)(tan)鋪機熨(yun)平板對(dui)預留橫(heng)縫(feng)(feng)(feng)(feng)(feng)端部預熱,對(dui)橫(heng)縫(feng)(feng)(feng)(feng)(feng)處(chu)篩細料(liao)進(jin)(jin)行(xing)(xing)人(ren)工(gong)(gong)(gong)(gong)修整(zheng),再進(jin)(jin)行(xing)(xing)攤(tan)(tan)鋪。用鋼(gang)輪壓路機對(dui)橫(heng)縫(feng)(feng)(feng)(feng)(feng)進(jin)(jin)行(xing)(xing)橫(heng)向和(he)縱(zong)向靜壓后,即用3m直(zhi)(zhi)(zhi)尺(chi)檢查接(jie)(jie)縫(feng)(feng)(feng)(feng)(feng)平整(zheng)度,如果不滿(man)足(zu)要求(qiu),進(jin)(jin)行(xing)(xing)人(ren)工(gong)(gong)(gong)(gong)修補(bu),對(dui)多(duo)余的(de)料(liao)由(you)(you)人(ren)工(gong)(gong)(gong)(gong)鏟除;對(dui)不足(zu)部分,由(you)(you)人(ren)工(gong)(gong)(gong)(gong)篩細料(liao)進(jin)(jin)行(xing)(xing)修補(bu),直(zhi)(zhi)(zhi)至接(jie)(jie)縫(feng)(feng)(feng)(feng)(feng)平順、合(he)格。

縱縫(feng)(feng)采用(yong)熱接縫(feng)(feng),在攤鋪機后面(mian)用(yong)一臺靜壓路機進(jin)行碾壓,使接縫(feng)(feng)平順而密實(shi)。