Placement Rates for Highway Embankment. Volume I. Development of Design Charts and Computer Programs: Fid-Bau Portal

Placement Rates for Highway Embankment. Volume I. Development of Design Charts and Computer Programs

R. J. Krizek / P. K. Krugmann

The controlled rate of construction procedure is investigated with regard to highway embankments resting on a soft, compressible soil layer which is underlain by a firm substratum. Special attention is given to the advantages of using vertical sand drains, and typical soil conditions, as well as sand drain installation procedures and their effect on the performance of a sand drain design, are considered. A precompression analysis involves problems associated with (a) the distribution of initial excess pore water pressures, (b) the dissipation of these excess pore water pressures, (c) the resulting settlements, and (d) the stability of the embankment-subsoil system. Solutions to each of these problems are presented, and charts are given to facilitate a preliminary precompression design. A well-documented set of computer programs, to illustrate the handling of input parameters, together with flow diagrams, is included to aid in making the final design or in checking a given design. Three examples are presented to elucidate the use of the programs.