如何操作壓路機做好瀝青路面的碾壓作業

瀝青混凝土結(jie)構層的(de)壓(ya)(ya)(ya)實度和平整度取決于碾(nian)壓(ya)(ya)(ya)時(shi)的(de)溫度和壓(ya)(ya)(ya)實方法,按照緊跟、慢壓(ya)(ya)(ya)、高頻、低幅的(de)原則進行碾(nian)壓(ya)(ya)(ya)。壓(ya)(ya)(ya)路機緊跟在攤鋪機后面碾(nian)壓(ya)(ya)(ya),在終壓(ya)(ya)(ya)前消除全部(bu)輪跡,達到(dao)要求的(de)壓(ya)(ya)(ya)實度后立即停(ting)止(zhi)作業,以(yi)免過振。由現場專職測(ce)試溫度人(ren)員指揮控制碾(nian)壓(ya)(ya)(ya)時(shi)間(jian)和地點(dian)。

碾壓(ya)(ya)(ya)按(an)照由(you)上而下、先靜后(hou)振、先慢后(hou)快(kuai)的(de)(de)原(yuan)則進(jin)行,盡量長(chang)距離(li)碾壓(ya)(ya)(ya),振壓(ya)(ya)(ya)時保證先停(ting)(ting)振后(hou)停(ting)(ting)機,先起步(bu)(bu)后(hou)起振。碾壓(ya)(ya)(ya)時,相鄰碾壓(ya)(ya)(ya)帶重(zhong)疊(die)1/3～1/2輪寬,從橫斷面(mian)上低的(de)(de)一(yi)(yi)側(ce)(ce)逐(zhu)步(bu)(bu)移向高的(de)(de)一(yi)(yi)側(ce)(ce),壓(ya)(ya)(ya)路機來(lai)回一(yi)(yi)次(ci)為一(yi)(yi)遍。壓(ya)(ya)(ya)路機碾壓(ya)(ya)(ya)時,離(li)攤鋪機方(fang)向不(bu)在同(tong)一(yi)(yi)斷面(mian)上,而是(shi)呈階梯形,每次(ci)前后(hou)錯開50cm左右(you),并且(qie)先長(chang)后(hou)短,即第一(yi)(yi)次(ci)碾壓(ya)(ya)(ya)距離(li)長(chang),其余各次(ci)逐(zhu)漸縮短。碾壓(ya)(ya)(ya)時,調整好壓(ya)(ya)(ya)路面(mian)碾壓(ya)(ya)(ya)輪灑(sa)水(shui)噴嘴,使其灑(sa)水(shui)適(shi)量,以不(bu)粘輪為宜。壓(ya)(ya)(ya)路機禁止(zhi)在未碾壓(ya)(ya)(ya)成型或未冷卻的(de)(de)路段上轉(zhuan)向、制動或停(ting)(ting)留(liu)。在壓(ya)(ya)(ya)路機壓(ya)(ya)(ya)不(bu)到的(de)(de)地方(fang),采用(yong)振動夯板來(lai)壓(ya)(ya)(ya)實。

一、初壓:

要(yao)在(zai)溫度大于150℃進行,先用鋼輪壓(ya)路(lu)機靜壓(ya)1～2遍(bian),速度控制在(zai)1.5km/h～2km/h。碾(nian)(nian)壓(ya)時,驅動(dong)輪面向攤鋪機,碾(nian)(nian)壓(ya)坡道時,驅動(dong)輪在(zai)低(di)處。

二、復壓:

初壓(ya)(ya)(ya)完后即刻進行復(fu)壓(ya)(ya)(ya),復(fu)壓(ya)(ya)(ya)溫度(du)不(bu)低于125℃,先用重型(xing)雙鋼輪(lun)壓(ya)(ya)(ya)路機振動碾(nian)壓(ya)(ya)(ya)4遍(bian)(bian)(bian)(bian),碾(nian)壓(ya)(ya)(ya)速(su)度(du)4km/h～5km/h,然后用重型(xing)輪(lun)胎(tai)壓(ya)(ya)(ya)路機碾(nian)壓(ya)(ya)(ya)6遍(bian)(bian)(bian)(bian),復(fu)壓(ya)(ya)(ya)速(su)度(du)為3.5km/h～4.5km/h。視壓(ya)(ya)(ya)實情況,碾(nian)壓(ya)(ya)(ya)遍(bian)(bian)(bian)(bian)數增(zeng)加1～2遍(bian)(bian)(bian)(bian)。

三、終壓:

緊接復壓后進行,采用雙鋼輪振動(dong)壓路(lu)機,關閉(bi)振動(dong),速度(du)控制在2km/h ~3km/h靜壓2遍,使路(lu)面(mian)無輪跡為止,終壓完成時,溫度(du)不低于110℃。

接(jie)(jie)縫(feng)(feng)處理也(ye)很重要(yao)。施(shi)工(gong)(gong)(gong)安排時將(jiang)力爭使(shi)按縫(feng)(feng)的(de)(de)數量減到最(zui)少(shao),橫(heng)向(xiang)施(shi)工(gong)(gong)(gong)接(jie)(jie)縫(feng)(feng)均采用垂直(zhi)(zhi)的(de)(de)平(ping)接(jie)(jie)縫(feng)(feng),并使(shi)各層之間(jian)的(de)(de)橫(heng)縫(feng)(feng)錯開。在(zai)施(shi)工(gong)(gong)(gong)結束時,攤(tan)鋪(pu)(pu)機(ji)在(zai)接(jie)(jie)近(jin)端部(bu)(bu)(bu)前10cm處將(jiang)熨平(ping)板稍稍抬起駛離現場,用切(qie)割機(ji)垂直(zhi)(zhi)切(qie)除(chu)端部(bu)(bu)(bu)層厚不足(zu)部(bu)(bu)(bu)分,使(shi)下(xia)(xia)次施(shi)工(gong)(gong)(gong)時成直(zhi)(zhi)角(jiao)連接(jie)(jie)。在(zai)下(xia)(xia)次施(shi)工(gong)(gong)(gong)前,對橫(heng)縫(feng)(feng)處刷乳化瀝青(qing),并用攤(tan)鋪(pu)(pu)機(ji)熨平(ping)板對預留橫(heng)縫(feng)(feng)端部(bu)(bu)(bu)預熱,對橫(heng)縫(feng)(feng)處篩細料進(jin)行(xing)人工(gong)(gong)(gong)修(xiu)整,再進(jin)行(xing)攤(tan)鋪(pu)(pu)。用鋼輪(lun)壓路機(ji)對橫(heng)縫(feng)(feng)進(jin)行(xing)橫(heng)向(xiang)和(he)縱(zong)向(xiang)靜壓后,即用3m直(zhi)(zhi)尺(chi)檢查接(jie)(jie)縫(feng)(feng)平(ping)整度,如果(guo)不滿足(zu)要(yao)求,進(jin)行(xing)人工(gong)(gong)(gong)修(xiu)補,對多余的(de)(de)料由(you)人工(gong)(gong)(gong)鏟除(chu);對不足(zu)部(bu)(bu)(bu)分,由(you)人工(gong)(gong)(gong)篩細料進(jin)行(xing)修(xiu)補,直(zhi)(zhi)至接(jie)(jie)縫(feng)(feng)平(ping)順、合格。

縱縫(feng)采用熱接(jie)縫(feng),在攤鋪(pu)機(ji)后面用一臺靜壓路機(ji)進行碾壓,使接(jie)縫(feng)平順而(er)密實。