The software offers the facility of a personalized database which gathers a wide range of materials that can be used for different regions of the triangulation.
For every material is necessary to define the Rn and Rt restitution parameters , the description and a color that allows the identification of the area.
A material can be assigned to a single element or to an entire region.
Single element
To assign a material to a single element choose the appropriate tool, click with the mouse on the element to alter and select a material from the pop-up window.
N.B.
To assign the same material to other single elements press the "Ctrl" key while selecting the elements.
Region
To assign a material to a group of elements choose the appropriate tool, select an area from the graphic, click with the mouse and choose a material from the pop-up window.
Valori dei coefficienti di restituzione in letteratura
Valori ricavati da prove in sito da Pfeiffer e Bowen (1990)
CARATTERISTICHE DEL PENDIO |
Kn |
Kt |
SMOOTH SURFACES OF RESISTANT MATERIAL SUCH AS ROAD OR ROCKY SURFACE |
0.37 – 0.42 |
0.87 – 0.92 |
PREVALENCE OF INTACT BEDROCK WITH ISOLATED BLOCKS |
0.33 – 0.37 |
0.83 – 0.87 |
DETRIT CONSISTING OF LARGE BLOCKS WITH LITTLE AFFIORATING VEGETATION |
0.30 – 0.33 |
0.82 – 0.85 |
DETRIT COVERED BY ABUNDANT VEGETATION AND SPARSELY VEGETATED SOIL |
0.28 – 0.30 |
0.80 – 0.83 |
SLOPE IN THE EARTH. |
|
0.78 – 0.82 |
Richards, 1988
CHARACTERISTICS OF THE SLOPE |
Kn |
Kt |
BIBLIOGRAPHIC REFERENCE |
AFFLORATING ROCK |
0.90 – 0.80 |
0.75 – 0.65 |
PITEAU & CLAYTON |
DETRIT AND AFFIORATING ROCK |
0.80 – 0.50 |
0.65 – 0.45 |
|
SOLID DETRIT AND ROCK |
0.50 – 0.40 |
0.45 – 0.35 |
|
VEGETATION |
0.40 – 0.20 |
0.30 – 0.20 |
|
ROCKY SUBSTRATE (BEDROCK) |
0.53 |
0.99 |
HOEK (RAPPORTO NON PUBBLICATO PER I “DEPARTMENTS OF TRANSPORTATION IN USA, 1987) |
ROAD SURFACE |
0.40 |
0.90 |
|
AFFLORATING ROCK |
0.35 |
0.85 |
|
DETRIT |
0.32 |
0.82 |
|
DETRIT AND VEGETATION |
0.32 |
0.80 |
|
SOIL WITH LITTLE VEGETATION |
0.30 |
0.80 |
|
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