Abstract
Large deformation of slope caused by earthquake can lead to the loss of stability of slope and its retaining structures. At present, there have been some research achievements about the slope reinforcement of stabilizing piles. However, due to the complexity of the structural system, the coupling relationship between soil and pile is still not well understood. Hence it is of great necessity to study its dynamic characteristics further. In view of this, a numerical model was established byFLAC3Din this paper, and the deformation and stress nephogram of sheet pile wall in peak ground motion acceleration (PGA) at 0.1 g, 0.2 g, and 0.4 g were obtained. Through the analysis, some conclusions were obtained. Firstly, based on the nephogram of motion characteristics and the positions of the slip surface and the retaining wall, the reinforced slope can be divided into 6 sections approximatively, namely, the sliding body parts of A, B, C, D, and E and the bedrock part F. Secondly, the deformation and stress distributions of slope reinforced by sheet pile wall were carefully studied. Based on the results of deformation calculation from time history analysis, the interaction force between structure and soil can be estimated by the difference of peak horizontal displacements, and the structure-soil coupling law under earthquake can be studied by this approach.
Highlights
Sheet pile wall is a typical supporting structure with advantages of safety, reliability, and low cost, which is widely used in the railway engineering, road engineering, and so forth
Takahashi et al [2] studied the seismic performance of pile wharf in the earthquake and analyzed the damage phenomena and failure mechanism of pile wharf caused by seismic permanent deformation; Abdoun et al [3] studied the dynamic response of the pile foundation in the earthquake by dynamic centrifuge model test; Jiao et al [4] analyzed the dynamic responses of the sheet pile wharf with separated relieving platform under horizontal seismic loadings; the Kobe and El Centro waves were taken to the numerical model, and it was found that the dynamic responses of the sheet pile wharf were affected by the dynamic characteristics, such as spectrum, wave energy density, and wave total energy
For the slope reinforced by sheet pile wall, Satoh et al [5] studied the status of slope reinforced by steel stabilizing pile in earthquake from dynamic centrifuge model test; Tao [6] studied the distribution law of pile stress and deformation in different seismic force by FLAC3D; Wang et al [7] studied the deformation law of cohesive soil slope reinforced by stabilizing pile through centrifuge model test
Summary
Sheet pile wall is a typical supporting structure with advantages of safety, reliability, and low cost, which is widely used in the railway engineering, road engineering, and so forth. For the slope reinforced by sheet pile wall, Satoh et al [5] studied the status of slope reinforced by steel stabilizing pile in earthquake from dynamic centrifuge model test; Tao [6] studied the distribution law of pile stress and deformation in different seismic force by FLAC3D; Wang et al [7] studied the deformation law of cohesive soil slope reinforced by stabilizing pile through centrifuge model test It divided the slope into four regions and compared the horizontal displacement of four regions in the same height; Giarlelis and Mylonakis [8] proposed the study about the dynamic properties of a cantilever wall. The results of this study can provide a reliable theoretical basis for revealing the seismic mechanism of slope reinforced by sheet pile wall
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