行業(yè)資訊
道路瀝青冷再生出現(xiàn)裂痕的表現(xiàn)形式有哪些？
來源：http://www.bystreet.cn/ 日期：2021-02-06
一般來說，瀝青冷再生混凝土路面裂縫大體分為兩種類型：一種是荷載型裂縫，即主要由于行車荷載作用下產(chǎn)生的裂縫。在車輛荷載作用下，半剛性基層底部產(chǎn)生拉應(yīng)力，如果拉應(yīng)力大于基層材料的抗拉強(qiáng)度，則基層底部很快開裂，直影響到瀝青面層；另一種是非荷載型裂縫，以溫度裂縫為主的低溫收縮裂縫和溫度疲勞裂縫；由于施工工藝不當(dāng)或用了不合格材料產(chǎn)生的裂縫。兩種類型的裂縫分別通過橫向裂縫、縱向裂縫、網(wǎng)裂和反射裂縫等形式表現(xiàn)出來。
Generally speaking, the cracks of asphalt cold recycled concrete pavement can be divided into two types: one is the load type crack, which is mainly caused by the driving load. Under the action of vehicle load, tensile stress is produced at the bottom of semi-rigid base. If the tensile stress is greater than the tensile strength of base material, the bottom of base will crack quickly until it affects the asphalt surface; the other is non load crack, which is mainly low temperature shrinkage crack and temperature fatigue crack; the other is crack caused by improper construction technology or unqualified materials. The two types of cracks are shown by transverse cracks, longitudinal cracks, net cracks and reflection cracks.
縱向裂縫現(xiàn)象為：裂縫走向基本與行車方向平行，裂縫長(zhǎng)度和寬度不一。一般都發(fā)生在高填方的路基上?？v向裂縫容易形成沿行車方向呈臺(tái)階狀，影響行車舒適性。
The longitudinal crack phenomenon is: the crack strike is basically parallel to the driving direction, and the crack length and width are different. It usually occurs on the high fill subgrade. The longitudinal cracks are easy to form, which are stepped along the driving direction and affect the driving comfort.
網(wǎng)狀裂縫現(xiàn)象為：裂縫縱橫交錯(cuò)，將面層分隔成若干多邊形的小塊，一般縫寬1mm以上，縫距40cm以下。網(wǎng)狀裂縫導(dǎo)致瀝青路面松散或坑槽，嚴(yán)重影響sbs改性瀝青路面的綜合服務(wù)水平。
The network crack phenomenon is: the crack crisscross, divides the surface layer into several polygon small pieces, generally the joint width is more than 1 mm, and the joint distance is less than 40 cm. Network Cracks lead to loose asphalt pavement or potholes, which seriously affect the comprehensive service level of SBS modified asphalt pavement.
橫向裂縫現(xiàn)象為：裂縫與路中心線基本垂直，縫寬不一，縫長(zhǎng)有的貫穿整個(gè)路幅，有的貫穿部分路幅，裂縫彎彎曲曲、有枝有叉。橫向裂縫中的唧漿導(dǎo)致裂縫兩側(cè)凹陷，橋頭跳車處的路面橫向裂縫，在路面積水的作用下加速跳車發(fā)展的速度，同時(shí)會(huì)對(duì)路基造成沖刷。
The transverse cracks are as follows: the cracks are basically vertical to the center line of the road, the width of the cracks is different, the length of the cracks runs through the whole road width, some runs through part of the road width, and the cracks are curved, with branches and forks. The pumping in the transverse cracks leads to the depression on both sides of the cracks. The transverse cracks on the road surface at the bump at the bridgehead accelerate the speed of bump development under the action of water accumulation on the road surface, and at the same time cause erosion to the subgrade.
反射裂縫現(xiàn)象為：基層產(chǎn)生裂縫以后，在溫度和行車荷載的作用下，裂縫逐漸反射到瀝青混凝土面層，路面的裂縫形式與基層裂縫形式基本一致。對(duì)于半剛性基層以橫向裂縫居多，對(duì)于柔性路面上加蓋的瀝青結(jié)構(gòu)層，裂縫形式不一，主要取決下承層。
The reflection crack phenomenon is: after the base cracks, under the effect of temperature and traffic load, the cracks gradually reflect to the asphalt concrete surface, and the crack form of the pavement is basically the same as that of the base. For the semi-rigid base, the majority of transverse cracks, for the asphalt structure layer covered on the flexible pavement, the crack forms are different, which mainly depends on the underlying layer.
以上是道路瀝青冷再生出現(xiàn)裂痕的表現(xiàn)形式的介紹，相信大家都有所了解了，如想了解更多精彩資訊請(qǐng)點(diǎn)擊我們的網(wǎng)站：冷再生機(jī)租賃http://www.bystreet.cn
The above is the presentation of cracks in the cold recycling of road asphalt. I believe you all know it. For more wonderful information, please click our website: cold recycling machine rental http://www.bystreet.cn
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