Landslides - Techniques of Evaluating Hazard

This report discusses current techniques used to evaluate landslide hazard in three stages. Firstly, the landslide hazard of an area is evaluated by collecting existing data, field reconnaissance, etc. At several specified sites along a route, more detailed investigations are then conducted, such as geophysical exploration, borings and stability analyses. The results are used to evaluate the landslide hazard at the sites more precisely and to design works to prevent possible landslides. [...]

Equipment and Methods Specific to Soil Treatment Works

To avoid the report on "Field treatment of soils with lime or hydraulic or pozzolanic binders" presented at the XIXth World Road Congress at Marrakech in 1991 (PIARC ref. 19.12.B), being too long, the Technical Committee on Earthworks, Drainage, Subgrade (C12) decided to limit the discussion of equipment and methods for stabilization to a simple listing. However, aware of the decisive practical impact of these points upon the quality of soil treatment works, C12 has decided to complete the report [...]

Leightweight Filling Materials

This document presents various lightweight filling materials for different applications in road construction. Details are given regarding material properties, design considerations, specifications related to the construction, pavement structure, environmental considerations if any, availability and economy. Practical use in particular projects are exemplified by various case histories from different countries. References are also given to documents where further details may be obtained. Since [...]

In Situ Assessment of Subgrade Materials

It is important to be able to forecast the performance of the subgrade, especially its acceptable limits of deformation derived for both the construction stage and during the working life of the pavement. Ten types of in situ test apparatus are described briefly and comparisons made between them, setting out their usefulness, field of application and limitations. Three studies comparing in situ tests are identified and described. The tests using large platens gave reasonably consistent results and [...]

Marginal Materials - State of the art

Three PIARC Technical Committees have devoted part of their preliminary work to the XVIIIth Congress (Brussels, 1987) to the use of marginal materials in road technology: Technical Committee on Testing of Road Materials, Technical Committee on Flexible Roads, Technical Committee on Earthworks, Drainage, Subgrade. The first part of the document concerns the use of marginal materials in earthworks and subgrade. The second part deals with the use of marginal materials in the construction of flexible [...]