A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Use of Ultra-Lightweight Geofoam to Reduce Stresses in Highway Culvert Extensions
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 the weaker portions of the culvert. To accommodate the increased stresses on the weaker portions of the culvert, lightweight material will be placed above the weaker portions of the culvert in the fields. Before construction begins, numerical analysis using FLAC 4.0 (Fast Lagrangian Analysis of Continua) was performed to predict stresses on the culvert. Results of the analysis show that geofoam has a great effect in reducing vertical stresses above and below the culvert. Valuable results using geofoam and foam concrete to reduce loads on a culvert are discussed in this report.
Use of Ultra-Lightweight Geofoam to Reduce Stresses in Highway Culvert Extensions
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 the weaker portions of the culvert. To accommodate the increased stresses on the weaker portions of the culvert, lightweight material will be placed above the weaker portions of the culvert in the fields. Before construction begins, numerical analysis using FLAC 4.0 (Fast Lagrangian Analysis of Continua) was performed to predict stresses on the culvert. Results of the analysis show that geofoam has a great effect in reducing vertical stresses above and below the culvert. Valuable results using geofoam and foam concrete to reduce loads on a culvert are discussed in this report.
Use of Ultra-Lightweight Geofoam to Reduce Stresses in Highway Culvert Extensions
L. Sun (author) / T. C. Hopkins (author) / T. L. Beckham (author)
2005
56 pages
Report
No indication
English
Civil Engineering , Construction Equipment, Materials, & Supplies , Highway construction , Embankments , Stress reduction , Numerical analysis , Tables(Data) , Numerical models , Material properties , Load analysis , Geofoam , Culvert extensions , Fast Lagrangian Analysis of Continua , Highway embankment construction , Expandable polystyrene (EPS) , FLAC 4.0 , Buried structure
Stress Reduction by Ultra-Lightweight Geofoam for High Fill Culvert: Numerical Analysis
| British Library Conference Proceedings | 2006
Load Reduction by Geofoam for Culvert Extension: Numerical Analysis
| British Library Conference Proceedings | 2006