Analysis Of The Urban Expressway Embankment Filling Construction Stability And Deformation

Abutments, culverts and retaining walls and other structures through the embankment road, usually required after the completion of the construction of embankment construction. But in order to save the construction period, often the first pile construction, abutments, culverts and retaining walls and other structures, after construction of subgrade, subgrade filling due to "rush period" needs quickly. Subgrade filling too fast, on the one hand is not conducive to a stable bridge, culverts, walls and other structures; and there is a big difference in the transition section on the other hand ground subsidence late consolidation, bridge, road culvert, a direct impact of road traffic safety and quality. In this paper, based on the theoretical analysis, through field tests and numerical simulation to study the effects of backfill compaction process resulting structures are discussed, the main results are:At the construction site by laying the instrument to measure the displacement of the abutment backfill compaction process, box culvert and retaining walls and other structures suffered earth pressure and produce, according to the observations, analyzes the changes in the vertical and horizontal stress trends, found not only increase the vertical stress when rolling roller, will increase the level of stress, but when the load disappears almost completely dissipated vertical stress, and stress levels will be a part of the retained residual stress; just rolling action increased levels of stress, affect depth of about 2m or so, does not influence on the vertical stress, and stress levels are not increased linearly with increasing depth, was first increased substantially unchanged even after decreasing trend; abutments and retaining wall displacement increased with filling height increases, gradually increasing from bottom to top; culvert parabolic top soil pressure distribution on both sides of the earth pressure greatly exceeds severe soil of high fill culvert shall take the necessary load reduction measures to reduce the damage caused by this unfavorable situation and so on.Geotechnical engineering analysis software using Plaxis right abutment, culvert structures such as numerical analysis, simulation under different conditions, subgrade filling for the impact structures. Combined with the results found in the residual stress abutment roller compacted after mainly in the upper part, about 1/3 of the time rolling around, for the lower part of the basic no residual stress, and the additional stress generated by the roller with an approximate load distance linearly decreasing trend; when both sides of the filling box culvert more stable, a small displacement, but in the case of filling one side, there is a greater horizontal displacement, which is mainly caused by rolling action of the roller, in produced when filling rolling horizontal slip, leading to destruction, to avoid this from happening.