如何操作壓路機做好瀝青路面的碾壓作業

瀝青混(hun)凝(ning)土結(jie)構層的(de)(de)壓(ya)(ya)實度(du)和(he)平整度(du)取決(jue)于碾(nian)壓(ya)(ya)時的(de)(de)溫度(du)和(he)壓(ya)(ya)實方法,按照緊(jin)(jin)跟、慢壓(ya)(ya)、高頻、低幅的(de)(de)原則進(jin)行碾(nian)壓(ya)(ya)。壓(ya)(ya)路機(ji)緊(jin)(jin)跟在攤鋪(pu)機(ji)后面碾(nian)壓(ya)(ya),在終(zhong)壓(ya)(ya)前消除全部輪跡,達到要求的(de)(de)壓(ya)(ya)實度(du)后立(li)即停止作業,以免過振。由現場(chang)專(zhuan)職測試(shi)溫度(du)人員指揮(hui)控制碾(nian)壓(ya)(ya)時間(jian)和(he)地點。

碾(nian)(nian)(nian)(nian)壓(ya)(ya)(ya)按(an)照由上(shang)而下(xia)、先(xian)(xian)靜后(hou)振(zhen)、先(xian)(xian)慢(man)后(hou)快(kuai)的(de)原則進行(xing),盡量長(chang)(chang)距離碾(nian)(nian)(nian)(nian)壓(ya)(ya)(ya),振(zhen)壓(ya)(ya)(ya)時保證先(xian)(xian)停振(zhen)后(hou)停機(ji)(ji),先(xian)(xian)起步后(hou)起振(zhen)。碾(nian)(nian)(nian)(nian)壓(ya)(ya)(ya)時,相鄰碾(nian)(nian)(nian)(nian)壓(ya)(ya)(ya)帶(dai)重疊1/3～1/2輪(lun)(lun)(lun)寬,從(cong)橫斷(duan)面(mian)上(shang)低的(de)一側逐步移(yi)向高的(de)一側,壓(ya)(ya)(ya)路(lu)機(ji)(ji)來回一次(ci)(ci)為一遍(bian)。壓(ya)(ya)(ya)路(lu)機(ji)(ji)碾(nian)(nian)(nian)(nian)壓(ya)(ya)(ya)時,離攤鋪機(ji)(ji)方(fang)(fang)向不(bu)(bu)在(zai)同(tong)一斷(duan)面(mian)上(shang),而是(shi)呈階梯形(xing),每次(ci)(ci)前后(hou)錯開50cm左右,并(bing)且先(xian)(xian)長(chang)(chang)后(hou)短(duan),即(ji)第(di)一次(ci)(ci)碾(nian)(nian)(nian)(nian)壓(ya)(ya)(ya)距離長(chang)(chang),其余各次(ci)(ci)逐漸縮(suo)短(duan)。碾(nian)(nian)(nian)(nian)壓(ya)(ya)(ya)時,調(diao)整好壓(ya)(ya)(ya)路(lu)面(mian)碾(nian)(nian)(nian)(nian)壓(ya)(ya)(ya)輪(lun)(lun)(lun)灑水(shui)噴嘴,使其灑水(shui)適量,以(yi)不(bu)(bu)粘輪(lun)(lun)(lun)為宜。壓(ya)(ya)(ya)路(lu)機(ji)(ji)禁止在(zai)未碾(nian)(nian)(nian)(nian)壓(ya)(ya)(ya)成型或未冷卻的(de)路(lu)段上(shang)轉向、制(zhi)動或停留。在(zai)壓(ya)(ya)(ya)路(lu)機(ji)(ji)壓(ya)(ya)(ya)不(bu)(bu)到的(de)地方(fang)(fang),采用振(zhen)動夯板來壓(ya)(ya)(ya)實。

一、初壓:

要(yao)在(zai)溫度大于150℃進行,先用鋼輪(lun)壓路(lu)機靜壓1～2遍,速度控制在(zai)1.5km/h～2km/h。碾壓時,驅動輪(lun)面向(xiang)攤鋪機,碾壓坡道時,驅動輪(lun)在(zai)低處(chu)。

二、復壓:

初(chu)壓(ya)完后(hou)即刻進行(xing)復壓(ya),復壓(ya)溫度不低于125℃,先用重(zhong)(zhong)型(xing)(xing)雙鋼輪壓(ya)路機(ji)振(zhen)動碾壓(ya)4遍(bian),碾壓(ya)速度4km/h～5km/h,然后(hou)用重(zhong)(zhong)型(xing)(xing)輪胎(tai)壓(ya)路機(ji)碾壓(ya)6遍(bian),復壓(ya)速度為3.5km/h～4.5km/h。視壓(ya)實情況,碾壓(ya)遍(bian)數增加1～2遍(bian)。

三、終壓:

緊接復壓后進行,采用雙鋼輪(lun)振(zhen)動(dong)壓路(lu)機(ji),關(guan)閉(bi)振(zhen)動(dong),速度控制在2km/h ~3km/h靜壓2遍,使路(lu)面無(wu)輪(lun)跡為止,終壓完成時(shi),溫度不低于110℃。

接縫(feng)(feng)處理也很重(zhong)要(yao)。施(shi)(shi)(shi)工(gong)(gong)(gong)安(an)排時(shi)將力(li)爭使(shi)按(an)縫(feng)(feng)的(de)數(shu)量減(jian)到最少,橫向(xiang)施(shi)(shi)(shi)工(gong)(gong)(gong)接縫(feng)(feng)均采用(yong)(yong)垂直(zhi)(zhi)的(de)平接縫(feng)(feng),并(bing)使(shi)各層(ceng)之間的(de)橫縫(feng)(feng)錯(cuo)開。在(zai)(zai)施(shi)(shi)(shi)工(gong)(gong)(gong)結(jie)束(shu)時(shi),攤(tan)(tan)鋪(pu)機在(zai)(zai)接近端(duan)(duan)部(bu)(bu)(bu)前10cm處將熨(yun)平板(ban)稍稍抬起駛離現場,用(yong)(yong)切割機垂直(zhi)(zhi)切除端(duan)(duan)部(bu)(bu)(bu)層(ceng)厚不(bu)足部(bu)(bu)(bu)分,使(shi)下次(ci)施(shi)(shi)(shi)工(gong)(gong)(gong)時(shi)成(cheng)直(zhi)(zhi)角連接。在(zai)(zai)下次(ci)施(shi)(shi)(shi)工(gong)(gong)(gong)前,對(dui)橫縫(feng)(feng)處刷(shua)乳化(hua)瀝青,并(bing)用(yong)(yong)攤(tan)(tan)鋪(pu)機熨(yun)平板(ban)對(dui)預留橫縫(feng)(feng)端(duan)(duan)部(bu)(bu)(bu)預熱,對(dui)橫縫(feng)(feng)處篩細料(liao)進(jin)行(xing)人(ren)工(gong)(gong)(gong)修(xiu)(xiu)整(zheng),再進(jin)行(xing)攤(tan)(tan)鋪(pu)。用(yong)(yong)鋼輪(lun)壓路機對(dui)橫縫(feng)(feng)進(jin)行(xing)橫向(xiang)和縱向(xiang)靜壓后,即用(yong)(yong)3m直(zhi)(zhi)尺檢查接縫(feng)(feng)平整(zheng)度(du),如果不(bu)滿足要(yao)求,進(jin)行(xing)人(ren)工(gong)(gong)(gong)修(xiu)(xiu)補(bu),對(dui)多(duo)余的(de)料(liao)由(you)人(ren)工(gong)(gong)(gong)鏟除;對(dui)不(bu)足部(bu)(bu)(bu)分,由(you)人(ren)工(gong)(gong)(gong)篩細料(liao)進(jin)行(xing)修(xiu)(xiu)補(bu),直(zhi)(zhi)至(zhi)接縫(feng)(feng)平順、合格。

縱縫采用熱(re)接縫,在攤(tan)鋪機后面用一臺靜(jing)壓(ya)路機進行(xing)碾壓(ya),使接縫平順而(er)密(mi)實。