柔性路面外文翻譯-其他專(zhuān)業(yè)-wenkub.com
2025-01-15 05:53 本頁(yè)面
【正文】 hence the term “rigid. Similarly, a concrete base that supports a brick or block layer might be described as “rigid. All other types of pavements have traditionally been classed as “flexible. A monly used definition is that “a flexible pavement is a structure that maintains intimate contact will and distributes loads to the subgrade and depends on aggregate interlock, particle friction, and cohesion for stability. Thus, the classical flexible pavement includes primarily those pavements that are posed of a series of granular layers topped by a relatively thin highquality bituminous wearing surface. Typically, the highestquality materials are at or near the surface. It should be pointed out that certain pavements that have an asphalt surface may behave more thick asphalt surfaces or that have base courses posed of aggregate treated with asphalt, cement, or limefly ,for convenience of presentation , these pavements will be considered to be in the flexible class. In the construction of highway, because the pitch road surface has surface to levelled , drives a vehicle to resist the slippery , low in noise , short , characteristic of maintaining fortably , wearresistingly simply and conveniently etc. of cycle of constructing, and the extensive application of quilt. People go on the expressway by bus, the roughness can reflect the whole result after the expressway is open to the traffic directly , reflect road surface use quality and drive a vehicle most direct appearance index of fortableness. While Shanghai and Nanjing expressway and expressway pitch road surface of airport of Nanjing construct our pany, tight to anize, construct meticulously , make road surface roughness variance reach and more highlevel respectively, have finished striving for the national best goal satisfactorily. This text bines construction and practises the reason to influence the roughness of road surface of pitch to analyse, propose the corresponding countermeasure. The structure of the flexible pavement is posed of a “wearing surface, base, subbase (not always used), and subgrade. The wearing surface and the base often prise two or more layers that are somewhat different in position and that are put down in separate construction operations. On many heavyduty pavements, a subbase of select material is ofte placed between the
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