外文翻譯---淺談水泥混凝土路面縱向裂縫的防治-文庫(kù)吧在線文庫(kù)
【正文】 適用于路面由于自身強(qiáng)度不足而產(chǎn)生的裂縫。 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。這種處理方法適用于各種原因引起的路面開(kāi)裂。不合格的材料不用。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)。最終導(dǎo)致混凝土板的破碎。(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。其承載力比較低；穩(wěn)定性聘書(shū)很差?；A(chǔ)縱向開(kāi)裂的因素比較多，但歸納起來(lái)可分以下幾類(lèi)。這種裂縫一般出現(xiàn)在行車(chē)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(kāi)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(kāi)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。水泥混凝土路面縱向裂縫是比較嚴(yán)重的一種病害。(1)填方路堤縱向開(kāi)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(lèi)路基的路基壓實(shí)度達(dá)不到設(shè)計(jì)或規(guī)范的要求。所以在路面恒載和汽車(chē)動(dòng)載的作用下，基礎(chǔ)首先出現(xiàn)了縱向裂縫。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。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(kāi)始。采用水泥混凝土路攤鋪機(jī)進(jìn)行施工是提高混凝土板的均勻性、密性、保證其質(zhì)量的最有利辦法之一。其次是混凝土拌和時(shí)控制施工配合比，各種材料計(jì)量必須準(zhǔn)確。但采用這種方法處理，費(fèi)用較大。 the stability of poor letter of appointment. Therefore, dead load on the road and the role of motor vehicles under the dynamic load, basic first vertical cracks. Cement Concrete Pavement strength Cement Concrete Pavement can not be sufficient if the arrival of the ability to engage in bendi
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