Study On Composite Foundation Settlement Of Railway High Fill Road Base

The layered composite foundation is often seen in engineering. With the rapiddevelopment of railway construction, special foundation of high fill embankment and specialarea appeared. At present domestic and international research for ordinary laminatedcomposite foundation settlement is relatively more, but for high embankment foundationshould be relatively less research on larger additional force of layered composite foundation.The stress in the high fill road base foundation superstructure, foundation subgrade slope ishigher, the settlement of subgrade influence is bigger, the types of foundation has realisticmeaning settlement. At present, the layered settlement of composite foundation is the mostcommonly used method is combined with the experiment by theory or by empirical formulato predict the settlement. Composite foundation method through experiment and computersimulation on clay, mudstone and coal rock consisting of larger in high embankmentfoundation added shall complete the construction of foundation under the action of force totrain operation foundation settlement deformation study.This paper first particularity of high embankment and layered composite foundation isintroduced in this paper, the engineering properties and the present research situation oflayered soil, clay, shale and coal layers of foundation are discussed. To determine theoptimum water content, the modulus of compressibility and friction angle and other physicalparameters by the compaction test and triaxial compression test of three. The expansive forceof the main components determination of mudstone and mudstone under different soilmoistures, provides the data support for the mudstone as foundation filler; throughcompaction test and the three axle test the compression modulus, friction angle and otherphysical parameters measured mudstone mudstone; relationship between the paving thickness,compaction and compaction times was determined by field compaction experiments ofmudstone, mudstone is the best paving thickness and rolling times. By assumption ofgeometric model, using the experimentally measured parameters foundation layers of filler,were built without considering the confining pressure, confining pressure effect of computermodel under consideration, determine the ground in the presence of different base foundationunder additional pressure deformation and coal for the impact of foundation settlement.The results of this study show that will occur to some extent during the verticaldeformation of the foundation in the filling after formal operation to train. In the absence ofsurrounding ground settlement with larger pressure conditions, with the junction between0.091m to0.126m of different roadbed settlement center line of subgrade slope height at thefoundation; under confining pressure center line of the vertical settlement of subgradefoundation between0.071to0.107m account. Horizontal rigid constraint constraint effect tosome extent on the deformation of foundation up to. Coal seam exists to stress diffusion effectto a certain extent, the foundation played a role.