如何操作壓路機做好瀝青路面的碾壓作業

瀝青混(hun)凝土結構層的壓(ya)實度(du)和(he)平整度(du)取決于碾壓(ya)時(shi)的溫度(du)和(he)壓(ya)實方法,按照(zhao)緊(jin)跟、慢壓(ya)、高頻、低幅的原則進行碾壓(ya)。壓(ya)路機(ji)緊(jin)跟在攤鋪機(ji)后面碾壓(ya),在終壓(ya)前消除(chu)全部輪(lun)跡,達到要求(qiu)的壓(ya)實度(du)后立即停止作業(ye),以(yi)免(mian)過振。由現(xian)場(chang)專職測試溫度(du)人員指揮控(kong)制碾壓(ya)時(shi)間和(he)地點(dian)。

碾(nian)壓(ya)(ya)(ya)(ya)按照(zhao)由上(shang)而(er)下、先(xian)(xian)(xian)(xian)靜(jing)后(hou)振(zhen)、先(xian)(xian)(xian)(xian)慢(man)后(hou)快的原(yuan)則進(jin)行(xing),盡量長距離碾(nian)壓(ya)(ya)(ya)(ya),振(zhen)壓(ya)(ya)(ya)(ya)時(shi)(shi)(shi)保證先(xian)(xian)(xian)(xian)停(ting)振(zhen)后(hou)停(ting)機(ji)(ji),先(xian)(xian)(xian)(xian)起步后(hou)起振(zhen)。碾(nian)壓(ya)(ya)(ya)(ya)時(shi)(shi)(shi),相鄰碾(nian)壓(ya)(ya)(ya)(ya)帶重疊(die)1/3～1/2輪寬,從橫斷(duan)面上(shang)低的一(yi)側逐步移向(xiang)高的一(yi)側,壓(ya)(ya)(ya)(ya)路(lu)機(ji)(ji)來(lai)(lai)回(hui)一(yi)次(ci)為(wei)一(yi)遍。壓(ya)(ya)(ya)(ya)路(lu)機(ji)(ji)碾(nian)壓(ya)(ya)(ya)(ya)時(shi)(shi)(shi),離攤(tan)鋪機(ji)(ji)方向(xiang)不在同一(yi)斷(duan)面上(shang),而(er)是呈階梯形,每次(ci)前后(hou)錯(cuo)開50cm左(zuo)右,并(bing)且先(xian)(xian)(xian)(xian)長后(hou)短,即第一(yi)次(ci)碾(nian)壓(ya)(ya)(ya)(ya)距離長,其(qi)余各次(ci)逐漸(jian)縮短。碾(nian)壓(ya)(ya)(ya)(ya)時(shi)(shi)(shi),調整好(hao)壓(ya)(ya)(ya)(ya)路(lu)面碾(nian)壓(ya)(ya)(ya)(ya)輪灑水噴嘴,使其(qi)灑水適(shi)量,以不粘輪為(wei)宜。壓(ya)(ya)(ya)(ya)路(lu)機(ji)(ji)禁止在未碾(nian)壓(ya)(ya)(ya)(ya)成型或(huo)未冷卻的路(lu)段(duan)上(shang)轉向(xiang)、制動(dong)或(huo)停(ting)留。在壓(ya)(ya)(ya)(ya)路(lu)機(ji)(ji)壓(ya)(ya)(ya)(ya)不到的地方,采用(yong)振(zhen)動(dong)夯(hang)板來(lai)(lai)壓(ya)(ya)(ya)(ya)實。

一、初壓:

要在溫度(du)大于150℃進行,先用鋼輪(lun)(lun)壓(ya)路機靜壓(ya)1～2遍,速(su)度(du)控制在1.5km/h～2km/h。碾壓(ya)時,驅動輪(lun)(lun)面向攤鋪機,碾壓(ya)坡(po)道時,驅動輪(lun)(lun)在低(di)處(chu)。

二、復壓:

初壓(ya)(ya)完(wan)后(hou)即刻進行(xing)復(fu)壓(ya)(ya),復(fu)壓(ya)(ya)溫度(du)(du)不低于125℃,先(xian)用重(zhong)型(xing)(xing)雙鋼輪(lun)壓(ya)(ya)路機(ji)振(zhen)動碾(nian)壓(ya)(ya)4遍(bian)(bian),碾(nian)壓(ya)(ya)速(su)度(du)(du)4km/h～5km/h,然后(hou)用重(zhong)型(xing)(xing)輪(lun)胎壓(ya)(ya)路機(ji)碾(nian)壓(ya)(ya)6遍(bian)(bian),復(fu)壓(ya)(ya)速(su)度(du)(du)為(wei)3.5km/h～4.5km/h。視壓(ya)(ya)實情(qing)況(kuang),碾(nian)壓(ya)(ya)遍(bian)(bian)數增加(jia)1～2遍(bian)(bian)。

三、終壓:

緊接(jie)復壓(ya)(ya)(ya)后進行,采用雙鋼(gang)輪振(zhen)動(dong)(dong)壓(ya)(ya)(ya)路(lu)(lu)機(ji),關閉振(zhen)動(dong)(dong),速度控制在(zai)2km/h ~3km/h靜壓(ya)(ya)(ya)2遍,使路(lu)(lu)面無輪跡為止,終壓(ya)(ya)(ya)完成時,溫度不低于110℃。

接(jie)(jie)縫處理也很重要(yao)。施(shi)(shi)(shi)工安(an)排時將力爭使按縫的(de)數量減(jian)到最少,橫(heng)向施(shi)(shi)(shi)工接(jie)(jie)縫均采(cai)用垂直的(de)平(ping)接(jie)(jie)縫,并使各層之間的(de)橫(heng)縫錯開(kai)。在(zai)(zai)施(shi)(shi)(shi)工結束時,攤(tan)鋪(pu)機(ji)在(zai)(zai)接(jie)(jie)近端部前10cm處將熨平(ping)板(ban)稍稍抬起駛離現場,用切(qie)割機(ji)垂直切(qie)除端部層厚不(bu)足(zu)部分,使下(xia)次施(shi)(shi)(shi)工時成直角連(lian)接(jie)(jie)。在(zai)(zai)下(xia)次施(shi)(shi)(shi)工前,對(dui)(dui)(dui)橫(heng)縫處刷乳化瀝青,并用攤(tan)鋪(pu)機(ji)熨平(ping)板(ban)對(dui)(dui)(dui)預留橫(heng)縫端部預熱,對(dui)(dui)(dui)橫(heng)縫處篩(shai)細(xi)料(liao)進行(xing)(xing)人(ren)工修整(zheng),再(zai)進行(xing)(xing)攤(tan)鋪(pu)。用鋼輪壓路機(ji)對(dui)(dui)(dui)橫(heng)縫進行(xing)(xing)橫(heng)向和縱向靜壓后,即用3m直尺檢查接(jie)(jie)縫平(ping)整(zheng)度,如果不(bu)滿足(zu)要(yao)求(qiu),進行(xing)(xing)人(ren)工修補,對(dui)(dui)(dui)多余的(de)料(liao)由(you)人(ren)工鏟除;對(dui)(dui)(dui)不(bu)足(zu)部分,由(you)人(ren)工篩(shai)細(xi)料(liao)進行(xing)(xing)修補,直至接(jie)(jie)縫平(ping)順、合格。

縱縫(feng)采用熱(re)接縫(feng),在(zai)攤鋪機后面用一臺(tai)靜壓路機進行碾壓,使接縫(feng)平順(shun)而密實(shi)。