Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Surface Settlement of Column-Supported Embankments: Results of Laboratory Tests
There is little published guidance describing how to relate settlement at the surface of a column-support embankment to settlement at the base. One method proposed by Russell et al. (2003) assumes that settlement at the base of the embankment produces zero volume change within the embankment. This paper describes results of extensive benchscale experiments that indicate that the embankment material dilates in response to internal deformation caused by base settlement. Laboratory scale experiments performed by Demerdash (1996) are also considered. The effect of dilation leads to surface settlement that is less than what is predicted using the zero volume change assumption. A modification to the method by Russell et al. (2003) is described to account for the effect of volume change within the embankment. The following conclusions can be drawn from the comparison of experimental measurements to the theoretical model proposed by Russell et al. (2003) relating uniform surface settlement to average base settlement: (1) Dilation of the embankment material is a significant factor in reducing uniform surface settlement for column-supported embankments above the critical height. The reduction in surface settlement due to dilation increased with increasing area replacement ratio in the experiments for replacement ratios from 0.01 to 0.25. (2) Preparing bench scale test samples at different initial relative densities in the range of 73 to 105% had little effect on surface settlement.
Surface Settlement of Column-Supported Embankments: Results of Laboratory Tests
There is little published guidance describing how to relate settlement at the surface of a column-support embankment to settlement at the base. One method proposed by Russell et al. (2003) assumes that settlement at the base of the embankment produces zero volume change within the embankment. This paper describes results of extensive benchscale experiments that indicate that the embankment material dilates in response to internal deformation caused by base settlement. Laboratory scale experiments performed by Demerdash (1996) are also considered. The effect of dilation leads to surface settlement that is less than what is predicted using the zero volume change assumption. A modification to the method by Russell et al. (2003) is described to account for the effect of volume change within the embankment. The following conclusions can be drawn from the comparison of experimental measurements to the theoretical model proposed by Russell et al. (2003) relating uniform surface settlement to average base settlement: (1) Dilation of the embankment material is a significant factor in reducing uniform surface settlement for column-supported embankments above the critical height. The reduction in surface settlement due to dilation increased with increasing area replacement ratio in the experiments for replacement ratios from 0.01 to 0.25. (2) Preparing bench scale test samples at different initial relative densities in the range of 73 to 105% had little effect on surface settlement.
Surface Settlement of Column-Supported Embankments: Results of Laboratory Tests
McGuire, Michael (Autor:in) / Filz, George (Autor:in) / Sloan, Joel (Autor:in)
2015
10 Seiten, Bilder, Tabellen, Quellen
Aufsatz (Konferenz)
Datenträger
Englisch
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