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澳大利亚新南威尔士由于把弯拉裂缝看成沥青路面破坏的主要模式,就特别需要以弯沉为标准的结构设计法。就一般设计而言,由于贝克曼梁已被认为是量测弯沉时最适当的工具,所以首先需要制定一种路面分析方法来整理其弯沉测定结果。这种路面分析法包括使用弹性理论来分析贝克曼梁的弯沉盆以确定路基的柔性和路面的总抗弯强度。这种弹性理论分析法已从理论上和实际上加以检验,以确定其应用范围并提供其用于实践时所需要的可靠程度。现场非破坏性试验特别适用于改建和补强设计。为此,把弹性理论分析发展成设计方法。由于路面总抗弯强度是以标准基层材料的等效厚度来表示的,所以设计方法采用了AASHO的路面基本模型。它包括用贝克曼梁的设计弯沉值[这是根据现有路面的使用性能和英国运输与道路研究所(TRRL)的弯沉设计标准的关系来确定的]来设计路面。本文叙述路面分析方法和用于改建与补强设计的结构法,其中也包括一个补强设计实例,用来说明这种方法。
New South Wales, Australia. Due to the bending and bending cracks as the main mode of asphalt pavement damage, especially the need for structural design as the standard deflection. As far as the general design is concerned, since Beckermann beam has been considered as the most suitable tool for measuring deflection, we first need to develop a pavement analysis method to finish the deflection measurement results. This method of pavement analysis involves the use of elastic theory to analyze bucky bowls of Beckmann beams to determine the subgrade’s flexibility and the total flexural strength of the pavement. This theory of elastic theory has been tested both theoretically and practically to determine its scope of application and to provide the degree of reliability it requires in practice. On-site nondestructive testing is particularly suitable for retrofitting and reinforcement design. To this end, the elastic theory analysis developed into the design method. Since the total flexural strength of the pavement is expressed as the equivalent thickness of the standard base material, the design method uses the basic pavement model of AASHO. It includes the design of the pavement using the design deflection of the Becker beams [which is based on the relationship between the serviceability of the existing pavement and the deflection design criteria of the British Transport and Roads Institute (TRRL]]. This article describes pavement analysis methods and structural methods for rebuilding and reinforcing designs, including a reinforcement design example to illustrate this approach.