【正文】 w fullcast concrete slab added to a wide range of singlelayer or doublereinforced, reinforced the general specifications of the steel used Φ10 made to 20 * 20cm spacing . This method is suitable for a variety of reasons arising from the road surface cracking. The use of this approach, the cost of the larger. Partial treatment Local processing is in the cracks on both sides of the range of not less than 50cm cutting a groove, deep groove thickness of ~ times the slot on both sides must be neat, should be cut cutting machine. Clean bottom, laying in the bottom Φ10mm reinforced with banding of 10 * 10cm steel net, and then poured with the same intensity of the original concrete pavement pebbles concrete, moisture transport and opening up health after 28 days. This method is relatively simple to deal with the economy, but only applies to the road as a result of their own strength and have a crack.。如果是由于基礎(chǔ)開(kāi)裂 而引起的路面開(kāi)裂，則應(yīng)在新澆混凝土板的全寬范圍內(nèi)加設(shè)單層或雙層鋼筋網(wǎng)，鋼筋網(wǎng)的規(guī)格一般用A10的鋼筋制成20*20cm間距即可。(3)半填半挖路段半填半挖及舊路加寬路基施工，心須認(rèn)真處理填方部分與舊路基或原山坡的接茬，在山坡上或舊路基邊坡上從填方坡腳向上挖成向內(nèi)傾斜的臺(tái)階。二是在拌和時(shí)計(jì)量不準(zhǔn)改變了混凝土的設(shè)計(jì)配合比。路床的基礎(chǔ)可分為兩類，一類是零填或挖方段，路床直接座落在天然土層上；另一種是填方路段，路床座落在路堤上。裂縫在車輪荷載的作用下，隨著時(shí)間的推移裂縫寬度不斷加寬，同時(shí)裂縫邊緣逐漸剝落破損，直至出現(xiàn)坑槽；由于這種裂縫是貫通板厚的，所以雨水會(huì)沿著裂縫下浸基層和路基，造成基礎(chǔ)強(qiáng)度下降，最后導(dǎo)致整個(gè)路面的破壞。水泥混凝土路面板如果不能夠有足夠抵搞彎拉的能力，那么在汽車荷載的作用下，必然產(chǎn)生縱向開(kāi)裂等破壞。前邊已經(jīng)對(duì)混凝土路面裂縫產(chǎn)生的主要原因進(jìn)行了分析，那么預(yù)防裂縫的發(fā)生就必須針對(duì)其采取有效措施。最后是控 制新拌混凝土從出機(jī)到人模的時(shí)間不能超過(guò)水泥的初凝時(shí)間；同時(shí)防止混凝土離析。 second is due to the reasons for the construction of paving concrete slabs less than the design value of strength. (1)Concrete strength less than the design requirements Lead to less than the strength of the concrete itself has two aspects. First, the quality of raw materials failed. No. away such as cement, aggregates of low strength or uneven grading standard, impurity content, such as transfinite. Second, when mixing the concrete measures are not allowed to change the mix design. (2)The construction of paving concrete slabs less than the design value of strengthSo far, domestic Cement Concrete Pavement Technology improper construction of the main manual and mechanical paver paving methods. Two construction methods of this difference on the vibration process, and impact strength of the concrete slab is mainly due to the vibration process paver. Artificial surface of the vibrated concrete paving process is usually inserted manually using vibrated vibrated point。局部處理是在裂縫兩側(cè)各不少于50cm范圍內(nèi)鑿一個(gè)槽，~，槽的兩邊必須整齊，應(yīng)采用切縫機(jī)切割。就滑模式攤鋪機(jī)而言，其混凝土振搗程序是先由振動(dòng)棒振搗，然后再由振動(dòng)梁振搗。人工攤鋪混凝土路面的振搗工藝通常是人工拿振搗插點(diǎn)式振搗；然后由人工拖平板振搗器橫向振搗，最后由人工拖振動(dòng)梁的表面振搗。但有時(shí)也由于路基分幅填筑而縱向接縫處理不當(dāng)，或分幅的厚度過(guò)大，在兩幅之間開(kāi)成了薄弱面。而對(duì)路面使用壽命影響最嚴(yán)重的當(dāng)屬縱向裂縫。就普通土而言，天然狀態(tài)下的土的干密度只有最大干密度的80%左右。一旦裂縫出現(xiàn)，則在裂縫的兩端就會(huì)發(fā)生應(yīng)力集中現(xiàn)象，所以，裂縫就很快向兩端延伸加長(zhǎng)，同時(shí)，縫寬也逐漸增加