Mechanistic-empirical Modeling and Design Model Development of Geosynthetic Reinforced Flexible Pavements

Mechanistic-empirical Modeling and Design Model Development of Geosynthetic Reinforced Flexible Pavements
Author: Steven W. Perkins
Publisher:
Total Pages: 156
Release: 2001
Genre: Geogrids
ISBN:

This report provides an appendix for the report with the reference: Perkins, S.W. (2001) Mechanistic Empirical Modeling and Design Model Development of Geosynthetic Reinforced Flexible Pavements: Final Report, Montana Department of Transportation, Helena, Montana, FHWA/MT 01 002/99160 1A, 156p. This report contains output from the software program DARWin for each design example provided in Appendix B of the above referenced report.

Efficient Transportation and Pavement Systems: Characterization, Mechanisms, Simulation, and Modeling

Efficient Transportation and Pavement Systems: Characterization, Mechanisms, Simulation, and Modeling
Author: Imad L. Al-Qadi
Publisher: CRC Press
Total Pages: 924
Release: 2008-11-01
Genre: Technology & Engineering
ISBN: 0203881206

Internationally, significant attention is given to transport sustainability including planning, design, construction, evaluation, safety and durability of the road system. The 4th International Gulf Conference on Roads: Efficient Transportation and Pavement Systems - Characterization, Mechanisms, Simulation, and Modeling, hosted by the University o

Analysis of Data for a Geosynthetic-reinforced Flexible Pavement

Analysis of Data for a Geosynthetic-reinforced Flexible Pavement
Author: Thomas Michael Vick
Publisher:
Total Pages: 288
Release: 2006
Genre:
ISBN:

In the summer of 2005, a geosynthetic-reinforced flexible pavement section was constructed in Northeast Arkansas by the University of Arkansas. The pavement section was constructed with seventeen individual test sections (each 15 m [50 ft] long). The first eight sections had an aggregate base coarse that was 25.4 cm (10 in) thick, the last eight sections had an aggregate base coarse that was 15.2 cm (6 in) thick and the aggregate in the center transition section tapered from 25.4 cm (10 in) to 15.2 cm (6 in) thick. There were a total of seven different geosynthetic configurations and a control section for each aggregate base thickness. The outside wheel path was instrumented with earth pressure cells, asphalt strain gages, geosynthetic foil strain gages, T-type thermocouples, and moisture content probes. A data acquisition system was used to acquire the responses to over 2,000 passes of a loaded, single axle dump truck. Over the course of testing, over 800 files of data were generated and processed. A file management and data manipulation process was developed by the author to organize, filter, process, analyze, evaluate, present, and archive the wealth of data into useable formats. The data manipulation procedure, a discussion of the time effort involved, and the difficulties encountered are discussed herein. Additionally, data analysis using Asphalt Institute transfer functions and Miner's hypothesis were employed to empirically evaluate the vehicle load responses acquired in Arkansas. The transfer functions were used to predict the damage induced in terms of alligator fatigue cracking and sub grade rutting. Finally, the results of the empirical rutting analysis were compared to actual field measurements provided to the author. Approximately half of the service life (in terms of rutting) was expended during the test for approximately 25% of the test sections, assuming a 13 mm (0.5 in) failure criterion. Unfortunately, the test site received roughly 70% of the anticipated rainfall. Therefore, the anticipated benefit of the geosynthetics (during the weakest conditions) was not observed, and the potential benefits associated with the geosynthetics were inconclusive. Further testing on this geosynthetic-reinforced flexible pavement test section in Arkansas will likely continue in the future.

Evaluation of Geosynthetic Reinforced Flexible Pavement Systems Using Two Pavement Test Facilities

Evaluation of Geosynthetic Reinforced Flexible Pavement Systems Using Two Pavement Test Facilities
Author: Steven W. Perkins
Publisher:
Total Pages: 120
Release: 2002
Genre: Geosynthetics
ISBN:

Montana State University has previously completed experimental test section, numerical modeling and design model development projects for the Montana Department of Transportation. Test section work has led to a fundamental understanding of mechanisms by which geosynthetics provide reinforcement when placed in the aggregate layer of flexible pavements. Finite element numerical models have relied upon this knowledge as their basis while design models derived from these numerical models have been calibrated against results from test sections. The test sections used for the development of these models were limited by the number of subgrade types, geosynthetic types and loading type employed. This project was initiated to provide additional test section data to better define the influence of traffic loading type and geosynthetic reinforcement type. The loading provided to the test sections forming the basis of the models described above consisted of a cyclic load applied to a stationary plate. In this project, four full scale test sections were constructed and loaded with a heavy vehicle simulator located at the U.S. Army Corps of Engineers facility in Hanover, NH. The four test sections used three geosynthetics identical to those used in previous test sections and pavement layer materials and thickness similar to previous sections. Additional test sections were constructed in the pavement test box used in previous studies to examine the influence of base aggregate type, base course thickness reduction levels and reinforcement type. A rounded pit run aggregate was used in test sections to evaluate the influence of geosynthetic aggregate shear interaction parameters on reinforcement benefit. The 1993 AASHTO Design Guide was used to backcalculate the base course thickness reduction from previous test section results where a traffic benefit ratio (extension of life) was known. Sections were built to this base course thickness reduction to see if equivalent life to an unreinforced section was obtained. Finally, six different geosynthetic products were used in test sections to evaluate the influence of reinforcement type on pavement performance.

Advances in Geosynthetics Engineering

Advances in Geosynthetics Engineering
Author: Mohamed Meguid
Publisher: Springer
Total Pages: 269
Release: 2018-10-28
Genre: Science
ISBN: 3030019446

This volume contains contributions on advances in geosynthetics engineering. Soil reinforcement is a very useful technique to construct several cost-effective soil structures in an environmentally friendly and sustainable manner. The most commonly used reinforcement materials are galvanised steel strips, geosynthetics in the form of woven geotextiles, geogrids and geocomposites, and fibres from natural and waste products. In recent years, there have been advances in the area of soil reinforcement, especially in the utilization of the technique in field projects. The researchers have also been working to understand the behaviour of reinforced soil considering the field challenges of reinforced soil structures. The volume is based on the best contributions to the 2nd GeoMEast International Congress and Exhibition on Sustainable Civil Infrastructures, Egypt 2018 – The official international congress of the Soil-Structure Interaction Group in Egypt (SSIGE).