Seismic Design Of Embankment

Geosynthetic reinforced embankment under seismic load calculation and analysis is a very complex issue, involving fillers, reinforcing materials, embankment type, filler and reinforcement of the interaction and so on. Gabion retaining walls is only recently began to study China and the use of the new structure of the project site, the retaining wall of mechanism and the dynamic characteristics of the research are very limited. In this paper, Geotechnical special software Geo-Studio, combined with the general project site embankment and gabion retaining walls, the quasi static and dynamic finite element analysis, Reinforced embankment proposed a general optimization method, the mechanism of gabion retaining walls and the dynamic characteristics, the reinforced embankment and gabion retaining walls for the construction and promotion of reference.The content and results of this study are as follows:(1) Static method through the study found that vehicle load on the embankment in the overall stability under seismic loading has little effect.4 m-20 m minimum security standards for Embankment in September near the dangerous state under the standard required measures to strengthen, in seven degrees, eight seismic loads, the standard embankment basically stable. Grading and installation of platform can effectively improve the seismic stability of the embankment as a whole, especially for high embankment, the slope of platform can grow up into several general slope, effectively reduce the risk of landslides sliding range, improve the embankment the overall stability of the slope. For improving the overall stability of reinforced embankment and reduce the embankment under earthquake displacement, have an important role, is to improve the seismic stability of embankment effective means.(2) General summary of reinforced embankment optimization program, usually after grading and setting the platform embankment, embankment at the top of the upper platform at the first level is the most dangerous parts, need to focus on strengthening the embankment for different heights, according to the situation in the upper due to the short ribs strengthened. Specifically, less than the 20m standard embankment and embankment slopes in the upper top of the first platform, the general shop for geogrid, the laying of the short ribs to the upper right,20m-30m of standard embankment and embankment slopes, in the to the top of a platform, the full shop and grille and the upper part of the interval by 0.5-1m short ribs can be laid.(3) Gabion retaining walls with good seismic performance, especially for large earthquakes, the effect is obvious, retaining walls under earthquake loading, the maximum pressure at the top of the ground-breaking, bottom of the smaller, intermediate minimum, top and middle of the acceleration amplification factor greater than the bottom, under the action of the earthquake, the damage in the form of gabion retaining wall crack and impact the top of the deformation. After the reinforced gabion retaining wall 0.45H (H is wall height) to the top of the wall of the range, is the need to focus on strengthening the parts.(4) Gabion retaining walls under earthquake loading, wall play a major role. Gabion embankment reinforcement can improve the overall stability, and to some extent, improve the gabion retaining wall of the seismic effect. Gabion retaining wall because of their stiffness and severe than embankment large earthquake under the constraint of the effective displacement of embankment, reducing the overall deformation of the embankment. Gabion retaining walls such as reinforced by the strengthening of the back in the top of the geogrid to be paved, in the upper part of the short ribs need to be properly added.