Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Physical model tests on the interaction of h-type stabilizing piles and landslides in bedrock with upper hard and lower weak strata
Combined stabilizing piles are an effective measure to reinforce large-scale landslides with complex strata. However, the reinforcement mechanism of h-type stabilizing piles in composite strata, such as strata with upper hard and lower weak bedrock, still needs to be studied in depth. Based on a set of self-developed physical devices for landslide-h-type stabilizing piles in bedrock with upper hard and lower weak strata, monitoring of stress and strain, laser range finder, high speed camera, and particle image velocimetry (PIV) techniques were adopted to study the internal forces and displacement of h-type stabilizing piles in landslides bedrock with upper hard and lower weak strata and the deformation characteristics of landslides, through which the interaction mechanism between h-type anti-sliding piles and landslides were revealed. The results showed that under the loading at the tope of the landslide, the h-type stabilizing pile reinforced landslide exhibited progressive failure characterized by four stages of creep, constant-speed deformation, accelerated deformation, and failure. Influenced by the beam, the displacement of the pile head and front and rear piles is small, but the piles have the maximum strain near the sliding mass. The bending moment of the rear piles showed an "S" type distribution curve, while that of the front piles showed a triangular distribution curve, and the maximum negative bending moment occurred at a depth of 20 cm below the beam. With the increase in the volume content of the hard stratum (φβ), the displacement of the pile head gradually decreased, and the maximum bending moment of the front and rear piles gradually decreased and tended to be stable as φβ exceeded 60%. When φβ was 20% and 40%, the soil pressure behind the rear piles showed a parabolic distribution curve; when φβ was 60% and 80%, it changed to the reverse "S" distribution curve, and the second maximum value occurred near the sliding surface. The soil pressure behind the front piles showed a parabolic distribution type versus the change of φβ. The results of this study can provide a theoretical reference for understanding the reinforcement mechanisms and design theories of combined stabilizing piles.
Physical model tests on the interaction of h-type stabilizing piles and landslides in bedrock with upper hard and lower weak strata
Combined stabilizing piles are an effective measure to reinforce large-scale landslides with complex strata. However, the reinforcement mechanism of h-type stabilizing piles in composite strata, such as strata with upper hard and lower weak bedrock, still needs to be studied in depth. Based on a set of self-developed physical devices for landslide-h-type stabilizing piles in bedrock with upper hard and lower weak strata, monitoring of stress and strain, laser range finder, high speed camera, and particle image velocimetry (PIV) techniques were adopted to study the internal forces and displacement of h-type stabilizing piles in landslides bedrock with upper hard and lower weak strata and the deformation characteristics of landslides, through which the interaction mechanism between h-type anti-sliding piles and landslides were revealed. The results showed that under the loading at the tope of the landslide, the h-type stabilizing pile reinforced landslide exhibited progressive failure characterized by four stages of creep, constant-speed deformation, accelerated deformation, and failure. Influenced by the beam, the displacement of the pile head and front and rear piles is small, but the piles have the maximum strain near the sliding mass. The bending moment of the rear piles showed an "S" type distribution curve, while that of the front piles showed a triangular distribution curve, and the maximum negative bending moment occurred at a depth of 20 cm below the beam. With the increase in the volume content of the hard stratum (φβ), the displacement of the pile head gradually decreased, and the maximum bending moment of the front and rear piles gradually decreased and tended to be stable as φβ exceeded 60%. When φβ was 20% and 40%, the soil pressure behind the rear piles showed a parabolic distribution curve; when φβ was 60% and 80%, it changed to the reverse "S" distribution curve, and the second maximum value occurred near the sliding surface. The soil pressure behind the front piles showed a parabolic distribution type versus the change of φβ. The results of this study can provide a theoretical reference for understanding the reinforcement mechanisms and design theories of combined stabilizing piles.
Physical model tests on the interaction of h-type stabilizing piles and landslides in bedrock with upper hard and lower weak strata
Yuehua Feng (Autor:in) / Xiaojuan Luo (Autor:in) / Junliang Li (Autor:in) / Zehua Cao (Autor:in) / Wenmin Yao (Autor:in) / Chengbin Song (Autor:in)
2022
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
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| British Library Online Contents | 2016