【DOC】-道路桥梁工程专业外文翻译--高等级公路沥青路面预防性养护-桥梁设计.doc

英文文献 Highway asphalt pavement Preventive Maintenance Abstract: The high-grade highway asphalt pavement and damaged the various early stage disease, the type of damage and its causes, and made a crack repair, slurry seal asphalt pavement, such as preventive conservation technology. Key words: asphalt pavement; conservation  asphalt pavement and the type of damage causes  type of damage The asphalt pavement damage can be divided into: crack category, loose category, class and other types of deformation of the four major categories  Causes (1) horizontal cracks in this relatively common disease, mainly due to contraction of asphalt surface temperature and semi-rigid or temperature shrinkage of the shrinkage caused. Roadbed degree of compaction less than this will lead to disease (2) vertical cracks in most cases took place in a half filled or half-dug embankment road widening, mainly from the roadbed caused by uneven settlement. (3) cracking along its initial shape is round with a single trace or more of parallel vertical joints, gradually appeared in the horizontal or vertical Feng Jian oblique connection joints cracking form. Mainly due to lack of structural strength from the road (4) along the road to track performance with a horizontal height difference, mainly because of foot-graded asphalt mixture design unreasonable. Poor or because of the stability of the grass-roots level and degree of compaction of the lack of construction so that the wheel tracks with the material and layer and grass-roots role in the traffic load has repeatedly appeared in the consolidation of lateral shear deformation and displacement caused. In addition, the overloading of heavy vehicles and also produce too many of the important reasons for rutting (5) is the main reason for the wave of road construction material design unreasonable or of poor quality, the road leading to insufficient material level of resistance Mou round of the role: Zongpo paragraph, because the high