three dimensional finite element modeling of pavement subsurface drainage systems

241 Pages·2017·4.21 MB·English

by  Yinhui Liu

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University of Kentucky Doctoral Dissertations Graduate School
2005
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University of Kentucky
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Liu, Yinhui, "THREE DIMENSIONAL FINITE ELEMENT MODELING OF PAVEMENT SUBSURFACE DRAINAGE
SYSTEMS" (2005). University of Kentucky Doctoral Dissertations. 311.
https://uknowledge.uky.edu/gradschool_diss/311
This Dissertation is brought to you for free and open access by the Graduate School at UKnowledge. It has been
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ABSTRACT OF DISSERTATION

Yinhui Liu

The Graduate School
University of Kentucky
2005
THREE DIMENSIONAL FINITE ELEMENT MODELING OF
PAVEMENT SUBSURFACE DRAINAGE SYSTEMS

ABSTRACT OF DISSERTATION

A dissertation submitted in partial fulfillment of the requirements for the degree
of Doctor of Philosophy in the College of Engineering at the University of
Kentucky

By
Yinhui Liu

Lexington, Kentucky

Director: Dr. Kamyar C. Mahboub, Professor of Civil Engineering at University
of Kentucky

Lexington, Kentucky

2005

Copyright @ Yinhui Liu 2005
ABSTRACT OF DISEERTATION

THREE DIMENSIONAL FINITE ELEMENT MODELING
OF PAVEMENT SUBSURFACE DRAINAGE SYSTEMS

Pavement subsurface drainage systems (PSDS) are designed to drain the entrapped water
out of pavement. To investigate the effects of various factors on the performance of PSDS,
three dimensional models were developed using the finite element method to simulate the
unsaturated drainage process in pavement. The finite element models were calibrated using the
field information on outflow, peak flow, layer saturations, and time to drain. Through a series
of parametric analyses, the factors that significantly influence the performance of PSDS were
screened out, and a set of recommendations were made to improve our current drainage
practices.

The effects of pavement geometry on drainage were studied in this research. The analysis
results indicate that edgedrain system can significantly improve the drainage efficiency of a
pavement. The drainage performance of a pavement is mainly affected by the geometric factors
that related to the edgedrain itself and the geometric factors related to the driving lanes have very
limited effects.

To investigate the influences of the properties of various pavement materials, some
physical-empirical equations were developed in this research. These equations were used to
predict the material hydraulic properties from their grain-size distributions and aggregate/asphalt
contents. The analysis results of the models with various material properties indicate that the
use of permeable base is effective in improving the drainage ability of a pavement. The
performance of PSDS is not only affected by material permeability but also by their water
retention ability. The pavement works as an integrated hydraulic system and the hydraulic
compatibility of materials must be considered in the PSDS design.

The effects of climatic factors on pavement drainage were also studied in this research. A
method was developed in this research to numerically describe the rainfall events. The analysis
results of the models under various rainfall events indicate that rainfall duration is a more
important parameter than the rainfall quantity in influencing the pavement drainage. Based on
the analysis results, regression equations were developed for the estimation of pavement
drainage. Finally, for design application purpose, a series of tables were included in this report
to help with proper selected of pavement drainage options.

KEYWORDS: Pavement Subsurface Drainage, 3-D Finite Element Modeling, Unsaturated Soil
Mechanics, Hydraulic Property Prediction, Rainfall Event Description

Yinhui Liu

July 14th, 2005
THREE DIMENSIONAL FINITE ELEMENT MODELING
OF PAVEMENT SUBSURFACE DRAINAGE SYSTEMS

By

Yinhui Liu

Kamyar C. Mahboub, Ph.D., PE
Director of Dissertation

Kamyar C. Mahboub, Ph.D., PE
Director of Graduate Study

July, 14th, 2005
Date
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DISSERTATION

Yinhui Liu

The Graduate School
University of Kentucky

2005
THREE DIMENSIONAL FINITE ELEMENT MODELING
OF PAVEMENT SUBSURFACE DRAINAGE SYSTEMS

DISSERTATION

A dissertation submitted in partial fulfillment of the requirements
for the degree of Doctor of Philosophy in the College of Engineering at the
University of Kentucky

By
Yinhui Liu

Lexington, Kentucky

Director: Dr. Kamyar C. Mahboub, Professor of Civil Engineering at University
of Kentucky

Lexington, Kentucky

2005

Copyright @ Yinhui Liu 2005
DEDICATION

To My Parents: Weixin Liu and Shurong Yin

My Daughter: Ruth Wu