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Use Of Ultra-Lightweight Geofoam To Reduce Stresses In Highway Culvert Extensions, Liecheng Sun, Tommy C. Hopkins, Tony L. Beckham
Use Of Ultra-Lightweight Geofoam To Reduce Stresses In Highway Culvert Extensions, Liecheng Sun, Tommy C. Hopkins, Tony L. Beckham
Kentucky Transportation Center Research Report
Culvert extension under highway embankment construction is a regular and important practice when roadway widening occurs. At some existing sites, concrete thickness and reinforcing steel of culvert tops and walls were stepped-down in sections of the culvert under the embankment slopes. The part of the culvert positioned under the embankment slopes was constructed weaker because the stresses under the portions of the slopes are much less than the stresses acting on the culvert section located under the main portion of the embankment. When additional fill is placed over the culvert due to roadway widening, much greater stresses are imposed on …
Reduction Of Stresses On Buried Rigid Highway Structures Using The Imperfect Ditch Method And Expanded Polystyrene (Geofoam), Liecheng Sun, Tommy C. Hopkins, Tony L. Beckham
Reduction Of Stresses On Buried Rigid Highway Structures Using The Imperfect Ditch Method And Expanded Polystyrene (Geofoam), Liecheng Sun, Tommy C. Hopkins, Tony L. Beckham
Kentucky Transportation Center Research Report
The study of earth pressure distribution on buried structures has a great practical importance in constructing highway embankments above pipes and culverts. Based on Spangler’s research, the supporting strength of a conduit depends primarily on three factors: 1. the inherent strength of the conduit; 2. the distribution of the vertical load and bottom reaction; and, 3. the magnitude and distribution of lateral earth pressures which act against the sides of the structure. Considering high fills above them and high earth pressures they may experience, rigid culverts are usually used underneath highway embankments. To reduce high vertical earth pressures acting on …