A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Maryland Highway Drainage Study. Volume VI. An Experimental Examination of the Subsurface Drainage of Roadways
The report describes a series of experiments conducted with an electric analog and Hele-Shaw Model to investigate the steady and unsteady flows in highway base courses. The Hele-Shaw Model was used to study the effects of the general groundwater table and local geometry of the system on the unsteady discharge into a typical ditch section. The geometry used was a fixed trench section without a pipe that modeled the field condition of a drainage ditch backfilled with coarse gravel. Before the experiments were started, a dimensional analysis was performed to isolate the important parameters influencing the discharge. The dimensional analysis was used to control the groundwater elevations set in the ditch and at the upper boundary and the distance from the trench bottom to the impervious layer. A hydrograph was obtained for each set of geometric conditions. The analog model was used to study the pipe-trench-sub-base system with a spatially varied infiltration entering the sub-base through the pavement and shoulder. The diameter of the drain was allowed to vary from four to twelve inches (300%) while the depth of the embedment varied.
Maryland Highway Drainage Study. Volume VI. An Experimental Examination of the Subsurface Drainage of Roadways
The report describes a series of experiments conducted with an electric analog and Hele-Shaw Model to investigate the steady and unsteady flows in highway base courses. The Hele-Shaw Model was used to study the effects of the general groundwater table and local geometry of the system on the unsteady discharge into a typical ditch section. The geometry used was a fixed trench section without a pipe that modeled the field condition of a drainage ditch backfilled with coarse gravel. Before the experiments were started, a dimensional analysis was performed to isolate the important parameters influencing the discharge. The dimensional analysis was used to control the groundwater elevations set in the ditch and at the upper boundary and the distance from the trench bottom to the impervious layer. A hydrograph was obtained for each set of geometric conditions. The analog model was used to study the pipe-trench-sub-base system with a spatially varied infiltration entering the sub-base through the pavement and shoulder. The diameter of the drain was allowed to vary from four to twelve inches (300%) while the depth of the embedment varied.
Maryland Highway Drainage Study. Volume VI. An Experimental Examination of the Subsurface Drainage of Roadways
R. S. Taylor (author) / R. M. Ragan (author)
1974
96 pages
Report
No indication
English
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