Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Determination of Stabilizing Forces Acting on Piles to Reinforce Slurry Trench against Globe Collapse
https://orcid.org/0000-0002-1214-0719
Concrete piles are used conventionally to reinforce slurry trench against global collapse during excavation in surrounding soft soil layers. In this paper, the stabilizing forces acting on piles were analyzed with the framework of the upper-bound approach of limit analysis combined with a rotational failure mechanism in undrained soil conditions. A trench without pile reinforcement was considered first, and the results obtained in the proposed approach agreed well with those obtained through the limit-equilibrium and variational limit-equilibrium closed-form solutions. It was shown that the trench has a deeper critical excavation depth as the stabilizing force provided by piles becomes greater. In addition, the critical sliding surface tended to be shallower with a decrease in the ground surcharge coupled with a surcharge near the edge of the trench. Finally, the required stabilizing forces were needed to increase rapidly to enhance the safety factor of the trench to 1.0. However, due to the reinforcement of slurry pressure and soil self-stabilization, the stabilizing forces were not always required at all excavation depths; only when excavation exceeds a certain depth could the reinforcing effect of piles be exerted.
Determination of Stabilizing Forces Acting on Piles to Reinforce Slurry Trench against Globe Collapse
https://orcid.org/0000-0002-1214-0719
Concrete piles are used conventionally to reinforce slurry trench against global collapse during excavation in surrounding soft soil layers. In this paper, the stabilizing forces acting on piles were analyzed with the framework of the upper-bound approach of limit analysis combined with a rotational failure mechanism in undrained soil conditions. A trench without pile reinforcement was considered first, and the results obtained in the proposed approach agreed well with those obtained through the limit-equilibrium and variational limit-equilibrium closed-form solutions. It was shown that the trench has a deeper critical excavation depth as the stabilizing force provided by piles becomes greater. In addition, the critical sliding surface tended to be shallower with a decrease in the ground surcharge coupled with a surcharge near the edge of the trench. Finally, the required stabilizing forces were needed to increase rapidly to enhance the safety factor of the trench to 1.0. However, due to the reinforcement of slurry pressure and soil self-stabilization, the stabilizing forces were not always required at all excavation depths; only when excavation exceeds a certain depth could the reinforcing effect of piles be exerted.
Determination of Stabilizing Forces Acting on Piles to Reinforce Slurry Trench against Globe Collapse
https://orcid.org/0000-0002-1214-0719
Concrete piles are used conventionally to reinforce slurry trench against global collapse during excavation in surrounding soft soil layers. In this paper, the stabilizing forces acting on piles were analyzed with the framework of the upper-bound approach of limit analysis combined with a rotational failure mechanism in undrained soil conditions. A trench without pile reinforcement was considered first, and the results obtained in the proposed approach agreed well with those obtained through the limit-equilibrium and variational limit-equilibrium closed-form solutions. It was shown that the trench has a deeper critical excavation depth as the stabilizing force provided by piles becomes greater. In addition, the critical sliding surface tended to be shallower with a decrease in the ground surcharge coupled with a surcharge near the edge of the trench. Finally, the required stabilizing forces were needed to increase rapidly to enhance the safety factor of the trench to 1.0. However, due to the reinforcement of slurry pressure and soil self-stabilization, the stabilizing forces were not always required at all excavation depths; only when excavation exceeds a certain depth could the reinforcing effect of piles be exerted.
Determination of Stabilizing Forces Acting on Piles to Reinforce Slurry Trench against Globe Collapse
Int. J. Geomech.
Zhang, Jingwu (Autor:in) / Li, Mingdong (Autor:in) / Yi, Jinxiang (Autor:in) / Liu, Zhidan (Autor:in)
01.06.2022
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
| DOAJ | 2021
Deep foundations with soil excavation: Bored piles, root piles, CFA piles, slurry trench walls
| British Library Conference Proceedings | 1994
The stability of piles adjacent to a slurry-supported trench
| British Library Conference Proceedings | 2006
Measurement of shear forces of frozen soil swelling acting on piles
| Online Contents | 1988
Design of slope stabilizing piles
| British Library Conference Proceedings | 1999