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道路沥青冷再生出现裂痕的表现形式有哪些?

来源:https://www.sddhfjx.com/ 日期:2021-02-06
一般来说,沥青冷再生混凝土路面裂缝大体分为两种类型:一种是荷载型裂缝,即主要由于行车荷载作用下产生的裂缝。在车辆荷载作用下,半刚性基层底部产生拉应力,如果拉应力大于基层材料的抗拉强度,则基层底部很快开裂,直至影响到沥青面层;另一种是非荷载型裂缝,以温度裂缝为主的低温收缩裂缝和温度疲劳裂缝;由于施工工艺不当或用了不合格材料产生的裂缝。两种类型的裂缝分别通过横向裂缝、纵向裂缝、网裂和反射裂缝等形式表现出来。
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.
纵向裂缝现象为:裂缝走向基本与行车方向平行,裂缝长度和宽度不一。一般都发生在高填方的路基上。纵向裂缝容易形成沿行车方向呈台阶状,影响行车舒适性。
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.
网状裂缝现象为:裂缝纵横交错,将面层分隔成若干多边形的小块,一般缝宽1mm以上,缝距40cm以下。网状裂缝导致沥青路面松散或坑槽,严重影响sbs改性沥青路面的综合服务水平。
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.
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横向裂缝现象为:裂缝与路中心线基本垂直,缝宽不一,缝长有的贯穿整个路幅,有的贯穿部分路幅,裂缝弯弯曲曲、有枝有叉。横向裂缝中的唧浆导致裂缝两侧凹陷,桥头跳车处的路面横向裂缝,在路面积水的作用下加速跳车发展的速度,同时会对路基造成冲刷。
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.
反射裂缝现象为:基层产生裂缝以后,在温度和行车荷载的作用下,裂缝逐渐反射到沥青混凝土面层,路面的裂缝形式与基层裂缝形式基本一致。对于半刚性基层以横向裂缝居多,对于柔性路面上加盖的沥青结构层,裂缝形式不一,主要取决下承层。
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.
以上是道路沥青冷再生出现裂痕的表现形式的介绍,相信大家都有所了解了,如想了解更多精彩资讯请点击我们的网站:冷再生机租赁http://www.sddhfjx.com
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.sddhfjx.com
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