橋(qiao)臺背(bei)(bei)(bei)墻(qiang)(qiang)(qiang)(qiang)(qiang)、梁(liang)(liang)端(duan)預(yu)(yu)留(liu)、預(yu)(yu)埋(mai)(mai)施工(gong)橋(qiao)臺、梁(liang)(liang)端(duan)的(de)伸(shen)(shen)(shen)(shen)(shen)縮(suo)縫(feng)(feng)預(yu)(yu)埋(mai)(mai)鋼筋(jin)(jin)平面(mian)位(wei)置、高程(cheng)必須(xu)準確，外側(ce)鋼筋(jin)(jin)保(bao)護層厚度(du)必須(xu)得到保(bao)證，預(yu)(yu)埋(mai)(mai)鋼筋(jin)(jin)應與梁(liang)(liang)體、背(bei)(bei)(bei)墻(qiang)(qiang)(qiang)(qiang)(qiang)結構鋼筋(jin)(jin)有(you)效連接；梁(liang)(liang)端(duan)預(yu)(yu)留(liu)槽的(de)高度(du)、寬度(du)符合設(she)計(ji)要求，其(qi)中(zhong)需(xu)特(te)別(bie)注意核對(dui)背(bei)(bei)(bei)墻(qiang)(qiang)(qiang)(qiang)(qiang)頂(ding)(ding)的(de)設(she)計(ji)高程(cheng)，一(yi)般在橋(qiao)臺背(bei)(bei)(bei)墻(qiang)(qiang)(qiang)(qiang)(qiang)設(she)計(ji)圖中(zhong)背(bei)(bei)(bei)墻(qiang)(qiang)(qiang)(qiang)(qiang)頂(ding)(ding)高度(du)在路面(mian)結構層底，故在施工(gong)背(bei)(bei)(bei)墻(qiang)(qiang)(qiang)(qiang)(qiang)時需(xu)留(liu)出伸(shen)(shen)(shen)(shen)(shen)縮(suo)縫(feng)(feng)安(an)(an)裝(zhuang)高度(du)。伸(shen)(shen)(shen)(shen)(shen)縮(suo)縫(feng)(feng)安(an)(an)裝(zhuang)高度(du)需(xu)0.2m，降噪d40型橋(qiao)梁(liang)(liang)伸(shen)(shen)(shen)(shen)(shen)縮(suo)縫(feng)(feng)，背(bei)(bei)(bei)墻(qiang)(qiang)(qiang)(qiang)(qiang)頂(ding)(ding)設(she)計(ji)高度(du)至路面(mian)為(wei)0.1m，在施工(gong)背(bei)(bei)(bei)墻(qiang)(qiang)(qiang)(qiang)(qiang)時需(xu)將背(bei)(bei)(bei)墻(qiang)(qiang)(qiang)(qiang)(qiang)頂(ding)(ding)施工(gong)高程(cheng)調低0.1m才能滿足伸(shen)(shen)(shen)(shen)(shen)縮(suo)縫(feng)(feng)安(an)(an)裝(zhuang)要求，否則后期伸(shen)(shen)(shen)(shen)(shen)縮(suo)縫(feng)(feng)安(an)(an)裝(zhuang)時需(xu)鑿除背(bei)(bei)(bei)墻(qiang)(qiang)(qiang)(qiang)(qiang)超(chao)高部分，并將導致伸(shen)(shen)(shen)(shen)(shen)縮(suo)縫(feng)(feng)預(yu)(yu)埋(mai)(mai)鋼筋(jin)(jin)在鑿除施工(gong)時被破(po)壞。

瀝(li)(li)青(qing)(qing)(qing)混(hun)凝(ning)(ning)(ning)(ning)土(tu)路(lu)面(mian)過縫(feng)(feng)(feng)處(chu)理(li)一般在(zai)(zai)(zai)瀝(li)(li)青(qing)(qing)(qing)混(hun)凝(ning)(ning)(ning)(ning)土(tu)橋面(mian)鋪(pu)裝層施(shi)(shi)工(gong)完(wan)成(cheng)后(hou)(hou)再進(jin)行(xing)伸(shen)(shen)縮(suo)(suo)縫(feng)(feng)(feng)施(shi)(shi)工(gong)，在(zai)(zai)(zai)施(shi)(shi)工(gong)瀝(li)(li)青(qing)(qing)(qing)混(hun)凝(ning)(ning)(ning)(ning)土(tu)路(lu)面(mian)時(shi)，對伸(shen)(shen)縮(suo)(suo)縫(feng)(feng)(feng)預留(liu)槽采(cai)用(yong)(yong)(yong)填塞沙袋，再鋪(pu)碎石砂(sha)礫混(hun)合(he)料進(jin)行(xing)鋪(pu)墊，松(song)鋪(pu)高度稍高于水泥混(hun)凝(ning)(ning)(ning)(ning)土(tu)橋面(mian)鋪(pu)裝2~3cm，并(bing)壓實。縮(suo)(suo)縫(feng)(feng)(feng)開(kai)槽要(yao)點伸(shen)(shen)縮(suo)(suo)縫(feng)(feng)(feng)開(kai)槽施(shi)(shi)工(gong)時(shi)需(xu)對道路(lu)交(jiao)通進(jin)行(xing)封閉(bi)，禁止車輛、行(xing)人誤入施(shi)(shi)工(gong)場地(di)。伸(shen)(shen)縮(suo)(suo)縫(feng)(feng)(feng)開(kai)槽在(zai)(zai)(zai)瀝(li)(li)青(qing)(qing)(qing)混(hun)凝(ning)(ning)(ning)(ning)土(tu)路(lu)面(mian)鋪(pu)裝完(wan)成(cheng)后(hou)(hou)進(jin)行(xing)，開(kai)槽寬度以(yi)設計值為(wei)基準，以(yi)檢測(ce)尺檢查伸(shen)(shen)縮(suo)(suo)縫(feng)(feng)(feng)處(chu)瀝(li)(li)青(qing)(qing)(qing)路(lu)面(mian)壓實后(hou)(hou)或(huo)行(xing)車碾(nian)壓后(hou)(hou)沉陷(xian)情況，確定伸(shen)(shen)縮(suo)(suo)縫(feng)(feng)(feng)開(kai)槽寬度，不宜過寬。開(kai)槽采(cai)用(yong)(yong)(yong)切(qie)割(ge)機先切(qie)縫(feng)(feng)(feng)，深度為(wei)瀝(li)(li)青(qing)(qing)(qing)混(hun)凝(ning)(ning)(ning)(ning)土(tu)面(mian)層厚(hou)度。開(kai)槽后(hou)(hou)瀝(li)(li)青(qing)(qing)(qing)混(hun)凝(ning)(ning)(ning)(ning)土(tu)的鑿(zao)除采(cai)用(yong)(yong)(yong)小型(xing)氣動錘或(huo)電鎬，為(wei)避免預埋(mai)鋼筋和(he)橋梁(liang)混(hun)凝(ning)(ning)(ning)(ning)土(tu)結構遭受破(po)壞，伸(shen)(shen)縮(suo)(suo)縫(feng)(feng)(feng)開(kai)槽清(qing)理(li)嚴禁使用(yong)(yong)(yong)液壓破(po)碎錘，塞縫(feng)(feng)(feng)的混(hun)填砂(sha)礫墊層采(cai)用(yong)(yong)(yong)高壓水沖(chong)洗法清(qing)除，梁(liang)體d40型(xing)橋梁(liang)伸(shen)(shen)縮(suo)(suo)縫(feng)(feng)(feng)，并(bing)將混(hun)凝(ning)(ning)(ning)(ning)土(tu)接茬面(mian)清(qing)洗干凈和(he)鑿(zao)毛處(chu)理(li)，在(zai)(zai)(zai)伸(shen)(shen)縮(suo)(suo)縫(feng)(feng)(feng)施(shi)(shi)工(gong)完(wan)成(cheng)后(hou)(hou)需(xu)再清(qing)理(li)蓋梁(liang)頂面(mian)遺留(liu)雜物。

mzl160橋(qiao)(qiao)梁(liang)伸(shen)縮縫(feng)安裝施工，其(qi)施工質量好壞直接影響橋(qiao)(qiao)梁(liang)使(shi)用年限和行車(che)舒適。

施工順序：橋面清理—標高復(fu)測調整—伸縮(suo)縫鋼構(gou)件檢查、確認、安(an)裝(zhuang)—澆搗C50鋼纖(xian)維混凝土—養(yang)護

切縫開槽

根(gen)據現(xian)場實際(ji)情(qing)況(kuang)，確(que)定切(qie)割(ge)寬度；

在開槽切割線內，首先用風鎬打松瀝青(qing)混凝土，d40型橋(qiao)梁伸(shen)(shen)縮(suo)縫(feng)，一要確保原伸(shen)(shen)縮(suo)縫(feng)安全，二(er)是防止切縫(feng)區外（路(lu)面(mian)(mian)和橋(qiao)面(mian)(mian)）松動(dong)。

清理預留槽

表層清(qing)除(chu)后，采用人工對(dui)縫區清(qing)理(li)；

清(qing)理干凈后(hou)，對槽區內混凝土面進行鑿毛處理，此工序作用增加新、老混凝土粘結。