Simple Approach to Estimation of Pavement Structural Capacity

Transportation Research Record - Tập 1652 Số 1 - Trang 198-205 - 1999
Stefan A. Romanoschi1, J B Metcalf1
1Department of Civil Engineering, 1419 CEBA, Louisiana State University, Baton Rouge, LA 70803

Tóm tắt

The use of the falling weight deflectometer (FWD) as a tool for investigating the structural strength of flexible and rigid pavements is now common. The backcalculation of layer moduli is the primary technique for data interpretation. This technique is cumbersome and expensive to apply to low-volume roads. A simple way of relating the FWD surface deflections to the performance of pavement structures, expressed by the structural number (SN), is presented. The technique is proposed as an alternative to existing methods in Louisiana using Dynaflect data. The relationship was deduced by statistical analysis, using the data collected at the Louisiana Transportation Research Center Pavement Research Facility. The study found that the correlation between the SN and the FWD deflections is satisfactory. Two different relationships are recommended for flexible and semirigid pavements. Both relationships can be applied in a pavement management environment because they allow evaluation of the required thickness for the asphalt overlay. It was found that the structural layer coefficients must be assigned functions of the laboratory moduli determined by the indirect tensile test, not functions of the backcalculated moduli.

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Tài liệu tham khảo

1993, AASHTO Guide for Design of Pavement Structures

Til V., 1972, NCHRP Report 128: Evaluation of AASHTO Interim Guides for Design of Pavement Structures

Witczak M., 1975, Principles of Pavement Design, 2

PatersonW. O. Road Deterioration and Maintenance Effects: Models for Planning and Management—HDM III. The World Bank, Washington, D.C., 1987, pp. 135–147.

Temple W. H., 1990, Implementation of the New AASHTO Pavement Design Procedure in Louisiana

Bohn A., 1972, Proc., 3rd International Conference on the Structural Design of Asphalt Pavements, 1

Tholen O., 1982, Proc., International Symposium on Bearing Capacity of Roads and Airfields, 446

Haas R., 1994, Modern Pavement Management

10.1520/STP19799S

10.1007/978-1-4757-2287-1

Ullitz P., 1987, Pavement Analysis

Kim Y. R., 1995, Transportation Research Record 1473, 55

1993, SHRP Procedure for Temperature Correction of Maximum Deflections

Johnson A. M., 1992, Transportation Research Record 1335

Jameson G. W., 1993, Development of Procedures to Predict Structural Number and Subgrade Strength from Falling Weight Deflectometer Deflections

Jameson G. W., 1992, Development of Philippines Asphalt Overlay Procedures—Pavement Management System

Rohde G. T., 1994, Transportation Research Record 1448, 61

King W., 1996, Construction and Comparison of Louisiana’s Conventional and Alternative Base Courses Under Accelerated Loading

1993, Manual for FWD Testing in the Long-Term Pavement Performance Program

Scullion T., 1991, MODULUS 4.0, User’s Manual

Roberts F. L., 1992, Analysis and Evaluation of Methods for Backcalculations of MR Values, 1

Newcomb D. E., 1987, Proc., Association of Asphalt Paving Technologists, 56, 91

Lytton, Germann, and Chou, 1990, PASELS—Determination of Asphaltic Concrete Pavement Properties by Nondestructive Testing

1993, SHRP’s Layer Moduli Backcalculation Procedure

Rada G. R., 1988, Transportation Research Record 1207, 134

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Transportation Research Record

Tập 1652 Số 1

198-205

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