Limit analysis under seismic conditions of a slope reinforced with prestressed anchor cables

Centrifuge modeling of seismic response and failure mode of a slope reinforced by a pile-anchor structure

Model establishment and response analysis of slope reinforced by frame with prestressed anchors under seismic considering the prestress

Experimental and numerical study on the seismic behavior of anchoring frame beam supporting soil slope on rock mass

Shaking table test and numerical simulation on a combined retaining structure response to earthquake loading

Seismic response of a sheet-pile wall with anchoring frame beam by numerical simulation and shaking table test

In order to study the engineering behaviors of reinforced gabion retaining wall, laboratory model test was carried out. Cyclic load and unload of five levels (0–50, 0–100, 0–50, 0–200 and 0–250 kPa) were imposed. Vertical earth pressure, lateral earth pressure, deformation behaviors of reinforcements, potential failure surface and deformation behaviors of wall face were studied. Results show that vertical earth pressure is less than theoretical value, the ratio of vertical earth pressure to theoretical value increases nearly linearly with increasing load, and the correlation coefficient of regression equation is 0.92 for the second layer and 0.79 for the fifth layer. The distribution of lateral earth pressure along the wall back is nonlinear and it is less than theoretical value especially when the load imposed at the top of retaining wall is large. Therefore, reinforced gabion retaining wall will be in great safety when current method is adopted. The deformation behaviors of reinforcements both in the third layer and the fifth layer are single-peak distributions, and the position of the maximum strain is behind that determined by 0.3H (Here H refers to the height of retaining wall) method or Rankine theory. Lateral deformation of wall face increases with increasing load, and the largest lateral deformation occurs in the fourth layer, which lead to a bulging in the middle of wall face.

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engineering behaviors of reinforced gabion retaining wall based on laboratory test

The evaluation of seismic passive earth pressure is an important aspect in designing safe retaining walls. In this paper, a slice analysis method is adopted to study the nonlinear distribution of seismic passive earth pressure while considering most of the possible parameters. The closed-form expressions for the resultant force of seismic passive earth pressure, earth pressure distribution, and its application position are obtained. The explicit solution for the critical failure angle of seismic passive earth pressure is proposed by simplifying the relation between the resultant force and the failure angle based on a graphical analysis method. Under certain conditions, the present method correlates with classical passive earth pressure theories. By comparing the present method with test results and previously published solutions, the results are found to be consistent. The influence of the seismic coefficients on seismic passive earth pressure is also studied.

A closed-form solution for seismic passive earth pressure behind a retaining wall supporting cohesive–frictional backfill

In order to study interface friction characteristics between reinforcements and red sandstone, pullout tests were carried out. Three reinforcements were chosen: 2.2 mm gabion mesh, 2.7 mm gabion mesh and 70RE geogrid. The pullout coefficient, cohesion and friction angle of these three reinforcements were obtained. The curves of pullout friction coefficient and normal stress, shear stress and pullout displacement were established. Test results showed: Pullout friction coefficient decreased nonlinearly with the increase of normal stress; When the pullout displacement reached a certain value, shear stress tended to be stable, and most of which presented a peak value; Pullout coefficients of different reinforcements differed greatly; Double twisted hexagonal gabion mesh had better interface friction characteristic than geogrid; The smaller the diameter of gabion mesh was, the better the interface friction characteristic would be; In general, the pulling-out process of reinforcements could be divided into three stages: initial stage, developing stage and yield stage. During the test, special clamping system was installed to limit lateral deformation of specimen.

Yun Li

Papers

Experimental and numerical study on the seismic behavior of anchoring frame beam supporting soil slope on rock mass

Seismic response of a sheet-pile wall with anchoring frame beam by numerical simulation and shaking table test

engineering behaviors of reinforced gabion retaining wall based on laboratory test

A closed-form solution for seismic passive earth pressure behind a retaining wall supporting cohesive–frictional backfill

Pullout Test Study on Interface Friction Characteristics of Reinforcements with Red Sandstone as Filler