Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Behavior of the Rebuilt Wolf Creek Culvert
The failure of an 18.5 foot diameter structural-plate culvert under 83 feet of cover led to its reconstruction using the 'imperfect trench' type of construction as well as other changes. The reconstructed culvert was instrumented to study its behavior. Computer programs were developed to determine stresses and earth pressures from data obtained by periodic readings of the instruments. Overall, the instrumentation performed satisfactorily. Results from strain gages, stress meters, and rubber pressure cells, correlated well and demonstrated that the vertical load on the culvert was much less than the weight of the overlying column of earth - a highly favorable load condition which the 'imperfect trench' method of construction was expected to produce. The SR-4 strain gages, which measured bending strains in addition to circumferential compression, showed that significant residual bending stresses were induced in the plates during erection. They also monitored bending stress changes that occurred at the strain gage sites during and after the backfilling operation. The vigorous compaction of the backfill on each side of the culvert, during the early stages of backfilling, produced a bending stress pattern in the side walls that persisted throughout the embankment construction period and thereafter. There was no measurable differential settlement of the pavement attributable to the 'imperfect trench' type of construction.
Behavior of the Rebuilt Wolf Creek Culvert
The failure of an 18.5 foot diameter structural-plate culvert under 83 feet of cover led to its reconstruction using the 'imperfect trench' type of construction as well as other changes. The reconstructed culvert was instrumented to study its behavior. Computer programs were developed to determine stresses and earth pressures from data obtained by periodic readings of the instruments. Overall, the instrumentation performed satisfactorily. Results from strain gages, stress meters, and rubber pressure cells, correlated well and demonstrated that the vertical load on the culvert was much less than the weight of the overlying column of earth - a highly favorable load condition which the 'imperfect trench' method of construction was expected to produce. The SR-4 strain gages, which measured bending strains in addition to circumferential compression, showed that significant residual bending stresses were induced in the plates during erection. They also monitored bending stress changes that occurred at the strain gage sites during and after the backfilling operation. The vigorous compaction of the backfill on each side of the culvert, during the early stages of backfilling, produced a bending stress pattern in the side walls that persisted throughout the embankment construction period and thereafter. There was no measurable differential settlement of the pavement attributable to the 'imperfect trench' type of construction.
Behavior of the Rebuilt Wolf Creek Culvert
G. A. Willett (Autor:in) / A. C. Scheer (Autor:in)
1968
170 pages
Report
Keine Angabe
Englisch
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