行業(yè)資訊
瀝青冷再生分析路面的裂縫種類及成因！
來源：http://hk-pinyan.cn/ 日期：2021-03-09
瀝青冷再生租賃路面的裂縫種類及成因：
The types and causes of cracks in asphalt cold recycling rental pavement are as follows
瀝青路面出現(xiàn)的裂縫，按其成因不同分為橫向裂縫、縱向裂縫和網(wǎng)狀裂縫。裂縫是瀝青路面主要的一種破損形式。
The cracks of asphalt pavement can be divided into transverse cracks, longitudinal cracks and network cracks according to their causes. Crack is a main damage form of asphalt pavement.
（1）橫向裂縫是指垂直于行車方向的裂縫。按成因不同分為載荷型裂縫與非載荷型裂縫，載荷裂縫是由于路面結(jié)構(gòu)設(shè)計(jì)不當(dāng)或施工質(zhì)量低劣或者由于車輛嚴(yán)重超載，致使瀝青面層或半剛性基層內(nèi)產(chǎn)生拉應(yīng)力超過其疲勞強(qiáng)度而斷裂。非載荷型裂縫是橫向裂縫的主要形式，這種裂縫又分為兩種情況：瀝青面層溫度縮裂荷基層反射裂縫。
(1) Transverse crack refers to the crack perpendicular to the driving direction. According to the different causes, it can be divided into load crack and non load crack. Load crack is due to improper design of pavement structure or poor construction quality or serious overload of vehicles, resulting in tensile stress in asphalt surface or semi-rigid base exceeding its fatigue strength. Non load crack is the main form of transverse crack, which can be divided into two kinds: temperature shrinkage crack of asphalt surface course and reflection crack of base course.
（2）縱向裂縫產(chǎn)生的原因一種情況是瀝青面層分幅攤鋪時(shí)，兩幅接茬處未處理好，在車輛載荷與環(huán)境因素作用下逐漸開裂；另一種情況是由于路基壓實(shí)度不均勻（含半填半挖路段）或由于路基邊緣受水浸泡產(chǎn)生不均勻沉陷而引起。
(2) One of the reasons for the longitudinal cracks is that the joints of the two sections are not well treated when the asphalt surface is spread in different sections, and gradually crack under the action of vehicle load and environmental factors; the other is due to the uneven compaction of the subgrade (including the half fill and half cut section) or the uneven settlement of the subgrade edge caused by water immersion.
（3）網(wǎng)狀裂紋主要是由于路面的整體強(qiáng)度不足而引起。其原因可能是路面結(jié)構(gòu)
(3) Network cracks are mainly caused by the lack of overall strength of the pavement. The reason may be the pavement structure
設(shè)計(jì)不合理，路基路面壓實(shí)度不足，路面材料配比不當(dāng)或未拌和均勻等，或者由于路面出現(xiàn)橫向或縱向裂縫后未及時(shí)封填，致使水分滲入下層，導(dǎo)致路面整體強(qiáng)度下降而引起。瀝青路面在施工期間以及在長期使用過程中的老化也是導(dǎo)致瀝青面層形成網(wǎng)裂的原因之一。
Unreasonable design, insufficient compactness of subgrade and pavement, improper proportioning or unevenness of pavement materials, etc., or due to the failure of timely sealing after transverse or longitudinal cracks on the pavement, water seeps into the lower layer, resulting in the decline of the overall strength of the pavement. The aging of asphalt pavement during construction and long-term use is also one of the reasons for the formation of Network Cracks in asphalt pavement.
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