Pavement drainage and pavement-shoulder joint evaluation and rehabilitation
Abstract
The objectives of this research were: (i) to evaluate the performance of pavement subdrainage systems; (ii) study the behavior of moisture conditions below pavements; and (iii) provide recommendations for improved drainage criteria based on analysis of field data. Existing and retrofitted subdrainage collector systems were inspected through external visual inspection in combination with a probe for internal inspection. Distresses and deficiencies in construction observed were listed and compiled on video. A methodology for inspection is presented that can be used by highway agencies in monitoring the condition, need for maintenance, and performance of collector systems. Pavements with various types of subdrainage systems were instrumented to monitor the effects of different parameters influencing flow. The instrumentation package included pressure transducers, moisture blocks, thermistor probe, raingage, tipping bucket flow meter and a data recording and storage system. Laboratory investigations were conducted on subgrade and subbase samples collected from instrumented sites to assess their material and hydraulic properties. Parameters obtained by fitting Brooks & Corey's model and Van Genuchten's model to experimental data have shown good correlations with measured values. Data collected from instrumented sites show varying response rate and time of outflow with respect to precipitation for different types of pavements and collector systems. Statistical Analysis has shown significant influence of base permeability in addition to pavement and drain types on pavement outflow. High correlations exist between precipitation and pore pressure underneath pavements. Data from instrumentation and laboratory tests will help in calibrating and validating an analytical seepage program developed separately as part of this research project.
Degree
Ph.D.
Advisors
White, Purdue University.
Subject Area
Civil engineering
Off-Campus Purdue Users:
To access this dissertation, please log in to our
proxy server.