Method of embankment modeling using one-dimensional layered finite elements

Abstract

An original method of computer modeling of ground layers in road embankments has been presented in the paper. A particular areas of presented method application are structures with a large distinctions in the stiffness parameters of each layer of the ground. These changes could be done by an emergency situations or simply by the errors made during the realization processes. The issue of the method is the use of a special finite elements, as a springs, for modeling of whole layered cross-section of road embankment. One single special linear finite element, which describes spring in Finite Element Method, is divided into sub-areas. Each subarea can be separately integrated and the same can have different stiffness and geometric parameters corresponding to the particular layer of subsoil or road embankment. Shape functions in so defi ned finite element need to be modified. Modification is necessary for matching the strain field distribution to the changes of the ground parameters. An example for subsidence calculation of layered road embankment has been done. Results were obtained from the different calculation methods. Comparison of these obtained results has been presented in the paper. A precise description of a special finite element and example of its application in the modeling of road embankments has been explained in the paper.