Title: PAVEMENT DESIGN. SINO-BRITISH HIGHWAYS AND URBAN TRAFFIC CONFERENCE. PAPERS PRESENTED AT THE CONFERENCE HELD IN BEIJING 17TH-22ND NOVEMBER 1986
Abstract: The engineering design of road pavements aims to match provision with need, so that the total cost of building, using, and maintaining a road can be minimised. Many factors must be considered in choosing the best design for any particular site; this paper describes how these factors have been balanced in the United Kingdom in order to produce design standards catering for most situations. The principles used can be applied in other countries, because each factor influencing design can be characterised in a quantitative way. The critical stresses, induced in road materials by traffic loading, can be prevented from exceeding acceptable levels by satisfying several design criteria, both those that apply during road construction and those that apply when a road is carrying traffic. During construction, the lower layers are of primary importance; while traffic is being carried, the upper layers assume the major role. The choice of design life directly determines the design traffic loading. In 1985, in the United Kingdom, designs for flexible and flexible composite pavements were upgraded to give an 85% probability of achieving a 20-year design life to the critical condition; concrete roads are currently designed for a 40-year life to failure. The paper also discusses: (1) assessments of subgrade, traffic loading, and construction for design; (2) design standards for foundations, pavement layers, and surfacings; (3) current developments in the Department of Transport's design standards, analytical design methods, and materials. (TRRL)
Publication Year: 1986
Publication Date: 1986-01-01
Language: en
Type: article
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Cited By Count: 1
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