TRID
Text Size:

Title:

PAVEMENT DEFLECTION TESTING IN THEORY AND PRACTICE

Accession Number:

00792986

Record Type:

Component

Availability:

Find a library where document is available

Order URL: http://worldcat.org/isbn/8390730472

Abstract:

The paper, in its first sections, is concerned with theoretical aspects of the inverse problem solution for a multilayered pavement model for both main current pavement deflection testing arrangements: (a) deflectometer and (b) deflectograph. The solution methods are described that make use of the deflection sensitivity factors associated with changes in layer moduli. These solution procedures served as a basis for developing computer programs DEGARES and BACKLAY for the deflectograph and deflectometer testing, respectively. The standard overlay design method is further described based on current Czech design specifications TP 77 for flexible pavements. The design method applies elements of the theory of reliability. The selected results of the 1998 comparative measurements, organized by the Czech Road Directorate, with four FWD testing devices and two deflectographs having taken part, are then used as a basis for discussing several practical aspects of the pavement performance evaluation and overlay design with conclusion that backcalculation programs must be used with extreme caution and that additional research is needed to further refine the backcalculation process. (A) For the covering abstract see ITRD E104741.

Language:

English

Corporate Authors:

ROAD AND BRIDGE RESEARCH INSTITUTE

UL JAGIELLONSKA 80
WARSAW 03-301 Poland

Authors:

NOVOTNY, B

Pagination:

p. 319-6

Publication Date:

1999

ISBN:

83-907304-7-2

Features:

References (5)

Subject Areas:

Highways; Pavements

Source Agency:

Transport Research Laboratory

Crowthorne House, Nine Mile Ride
Wokingham, Berkshire RG40 3GA United Kingdom

Source Data:

IRRD E104760

Files:

ITRD

Created Date:

May 31 2000 12:00AM

More Records from this Conference: