Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effect of the construction sequence of bridge approach on piled abutments in soft silty clay
A series of well-established 3-D numerical analyses based on centrifuge tests were conducted to examine the effect of the construction sequence on a piled abutment over soft ground. Two extreme construction sequences were studied: (i) a sequence involving installing the piled abutment until its settlement is totally stable, then followed by constructing the approach embankment (i.e., test X); (ii) a sequence involving installing the piled bridge abutment and constructing the approach embankment simultaneously (i.e., test T). Results indicated that owing to more adequate consolidation process of soft soil after the abutment installation for test X, the normal contact pressure in magnitude was larger than that for test T along the entire pile shaft. By comparison between tests T and X, the rotation direction of the abutment wall is closely associated with the moment equilibrium dominated by earth pressures against the abutment wall and normal contact pressures resisted on the piles. The construction sequence imposed a limited influence on the maximum bending moments, accounting for about 55% of the ultimate bending moment capacity of the pile in both tests T and X.
Effect of the construction sequence of bridge approach on piled abutments in soft silty clay
A series of well-established 3-D numerical analyses based on centrifuge tests were conducted to examine the effect of the construction sequence on a piled abutment over soft ground. Two extreme construction sequences were studied: (i) a sequence involving installing the piled abutment until its settlement is totally stable, then followed by constructing the approach embankment (i.e., test X); (ii) a sequence involving installing the piled bridge abutment and constructing the approach embankment simultaneously (i.e., test T). Results indicated that owing to more adequate consolidation process of soft soil after the abutment installation for test X, the normal contact pressure in magnitude was larger than that for test T along the entire pile shaft. By comparison between tests T and X, the rotation direction of the abutment wall is closely associated with the moment equilibrium dominated by earth pressures against the abutment wall and normal contact pressures resisted on the piles. The construction sequence imposed a limited influence on the maximum bending moments, accounting for about 55% of the ultimate bending moment capacity of the pile in both tests T and X.
Effect of the construction sequence of bridge approach on piled abutments in soft silty clay
Xiao, Dong (Autor:in) / Wen, Lina (Autor:in)
06.11.2021
490200 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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