外文翻譯---淺談水泥混凝土路面縱向裂縫的防治-wenkub.com
2025-01-12 02:26 本頁面
【正文】 At the same time to prevent concrete segregation. 4 To deal with cracks the other is the fill section of the road bed is located on the embankment. The basis of the factors of vertical cracks, but there can be summarized in the following categories. (1) Fill Embankment Vertical cracking is mainly due to the high embankment of filling from the ground to the top surface of the road bed is greater than 80cm away from the roadbed subgrade paction of such degrees can not design or specification requirements. But sometimes also increase as a result of subroadbed filling the vertical joints and handled properly, or the thickness increase is too large, in the opening between the two has bee the weak side. (2) Half filled and halfdug into the old road embankment Halffilled and the old road a halfdug into the road in the new way to fill one side of the new and the old roadbed excavation side of the seven Department, if handled properly, it often appears in the vertical cracks here. In particular, the side excavation is hard soil or rock, there a greater chance of vertical cracks. (3) Zerofilling and excavation subgrade If this type of subgrade vertical crack is not handled properly or not based on thorough, based on the strength of the bid opening should be less than the capacity. In the past and the existing norms and standards, the excavation and zerofilled sections of the basis for the treatment of only the roadbed (way below the top surface slot 0 ~ 30cm) made a request, and on the road under the bed (the way trough the following top 30 ~ 80cm) do not require natural state can be. On ordinary soil, the natural state of the dry density of the soil maximum dry density is only about 80%. Its bearing capacity is relatively low。這種處理方法比較簡(jiǎn)單經(jīng)濟(jì)，但僅適用于路面由于自身強(qiáng)度不足而產(chǎn)生的裂縫。這種處理方法適用于各種原因引起的路面開裂。在處理之前，必須對(duì)裂縫產(chǎn)生的原因進(jìn)行調(diào)查分析，確定是什么原因引起的，然后再確定用什么方法處理。不合格的材料不用。所以攤鋪的混凝土板均勻、密實(shí)，無薄弱點(diǎn)或薄弱面。填方路基的壓實(shí)度應(yīng)該相應(yīng)地提高1~3個(gè)百分點(diǎn)。另外在路基填筑時(shí)必須全幅填筑，不應(yīng)分幅施工，人為地造成縱向工作縫而形成薄弱面。最終導(dǎo)致混凝土板的破碎。這樣，水泥混凝土板就不可能過到均勻密實(shí)。(2)施工攤鋪的原因而使混凝土板強(qiáng)度達(dá)不到設(shè)計(jì)值到目前為止，國(guó)內(nèi)的水泥混凝土路面攤鋪工藝不當(dāng)施工主要采用人工攤鋪和機(jī)械攤鋪兩種方法。(1)混凝土強(qiáng)度達(dá)不到設(shè)計(jì)要求導(dǎo)致混凝土自身的強(qiáng)度不足有兩個(gè)方面的因素。其承載力比較低；穩(wěn)定性聘書很差。尤其是挖 方側(cè)是硬土或是巖石，出現(xiàn)縱向裂縫的機(jī)率更大?；A(chǔ)縱向開裂的因素比較多，但歸納起來可分以下幾類。路面的基礎(chǔ)是路床。這種裂縫一般出現(xiàn)在行車道的中部，一旦發(fā)生就是幾塊或幾十塊混凝土板連續(xù)開裂，而且裂縫貫穿整個(gè)板厚；裂縫的寬度也是隨著時(shí)間的推移而不斷的發(fā)展，由剛開始時(shí)零點(diǎn)幾毫米、可發(fā)展到幾毫米、幾厘米，最寬的裂縫可達(dá)5cm以上。淺談水泥混凝土路面縱向裂縫的防治1前言水泥混凝土路面的裂縫形式是多種多樣的。水泥混凝土路面縱向裂縫是比較嚴(yán)重的一種病害。路床承受著路面所產(chǎn)生的恒載,同時(shí)還承受著由路面?zhèn)鱽淼男熊嚭奢d。(1)填方路堤縱向開裂的主要原因是路基的填筑高度從原地面至路床頂面的距離大于80cm這類路基的路基壓實(shí)度達(dá)不到設(shè)計(jì)或規(guī)范的要求。(3)零填及挖方路基這類路基如果出現(xiàn)縱向開裂 主要是基礎(chǔ)處理不當(dāng)或不徹底，基礎(chǔ)強(qiáng)度達(dá)不到應(yīng)有的承開能力。所以在路面恒載和汽車動(dòng)載的作用下，基礎(chǔ)首先出現(xiàn)了縱向裂縫。一是原材料質(zhì)量不合格。兩種施工方法的本提上的差異是振搗工藝，而影響混凝土板強(qiáng)度的主要原因是攤鋪中的振搗工藝。眾所周知，混凝土的密實(shí)程度 直接影響其強(qiáng)度。3縱向裂縫的預(yù)防措施水泥混凝土路面縱向裂縫 的預(yù)防必須從治本開始。(
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