Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Micropile and Ground Anchor Retaining Structures for Stabilization of the Blue Trail Landslide
An innovative retention system consisting of battered micropiles and permanent ground anchors attached to a concrete cap beam was used to stabilize the Blue Trail on U.S. Highway 26/89 in Wyoming. Design, construction, and performance of the system are described in this report. Field instrumentation used for monitoring and performance analysis included strain gages and load cells on four permanent ground anchors. Slope inclinometer readings, survey monuments, and tiltmeter measurements were used to determine ground and wall movements during and after construction. Pressure transducers in ground water observation wells were used to monitor pore water pressures. Field observations show that this stabilization system is highly effective in controlling ground movements that had been causing roadway damage for over twenty years. It is also concluded that this system provided the Wyoming DOT with an economical and environmentally acceptable solution to a difficult engineering problem. Assumption and procedures used in the design of the system are reviewed and compared to field observations. It was found that the installation and post-tensioning of permanent ground anchors followed with micropiles could result in micropile loads, which are opposite in direction compared to those assumed for design purposes. This load reversal was observed in micropiles of one wall studied for this project. Recommendations for improving design procedures are presented.
Micropile and Ground Anchor Retaining Structures for Stabilization of the Blue Trail Landslide
An innovative retention system consisting of battered micropiles and permanent ground anchors attached to a concrete cap beam was used to stabilize the Blue Trail on U.S. Highway 26/89 in Wyoming. Design, construction, and performance of the system are described in this report. Field instrumentation used for monitoring and performance analysis included strain gages and load cells on four permanent ground anchors. Slope inclinometer readings, survey monuments, and tiltmeter measurements were used to determine ground and wall movements during and after construction. Pressure transducers in ground water observation wells were used to monitor pore water pressures. Field observations show that this stabilization system is highly effective in controlling ground movements that had been causing roadway damage for over twenty years. It is also concluded that this system provided the Wyoming DOT with an economical and environmentally acceptable solution to a difficult engineering problem. Assumption and procedures used in the design of the system are reviewed and compared to field observations. It was found that the installation and post-tensioning of permanent ground anchors followed with micropiles could result in micropile loads, which are opposite in direction compared to those assumed for design purposes. This load reversal was observed in micropiles of one wall studied for this project. Recommendations for improving design procedures are presented.
Micropile and Ground Anchor Retaining Structures for Stabilization of the Blue Trail Landslide
R. N. Hasenkamp (Autor:in) / J. P. Turner (Autor:in)
2000
112 pages
Report
Keine Angabe
Englisch
Soil & Rock Mechanics , Highway Engineering , Pile foundations , Landslides , Soil stabilization , Wyoming , Construction , Performance tests , Monitoring , Strain gages , Slopes , Inclinometers , Surveying instruments , Tiltmeters , Seismicity , Pressure transducers , Pore water pressures , Groundwater , Observation wells , Posttensioning , Loads , Concrete structures , Pile caps , Embarkments , Roads , Structural design , Retaining walls , Structural engineering , Soil mechanics , Highway engineering , Geotechnical engineering , Micropiles , Permanent ground anchors , Blue Trail Landslide
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