The behaviour of a large dam at severe frost

Main Article Content

P. CALOI
M. MIGANI
M. C. SPADEA

Abstract

Synthesizing the problem, the action of the thrusts in the
behaviour of t h e dam of Pieve di Cadore, makes itself conspicuous expecially
during three periods of the year:
1. - About the end of June, the air temperature, 011 t h e average, overcomes
the water one in the watershed upstream the dam: the bending of
t h e dam upstream increases from the bottom to the top.
2. - About the end of October, the thermal conditions change; the
mean air temperature grows lower than the mean water temperature; the
dam begins her bending dowstream.
3. - When the air temperature is distinctly below 0 °C, the action of
t h e t h r u s t s grows more complexe; t h e rocky waterlogged system downstream
of t h e dam, while cooling, swells and pushes t h e bottom of t h e dam upstream;
at t h e higher quote, on the contrary, the t h r u s t downstream continues.
When the strenght limit of the medium is surpassed, arises a contrast
between the rocky system and the concrete structure: this contrast can origin
a t e very small fractures, revealed from seismic station installed into the
central ashlar (XIV) a t 660 metres height of t h e dam, under t h e form of microshocks
which energy is of about 10I0-10U erg.

Article Details

How to Cite
1.
CALOI P, MIGANI M, SPADEA MC. The behaviour of a large dam at severe frost. Ann. Geophys. [Internet]. 1972Nov.25 [cited 2021Sep.25];25(4):519-25. Available from: https://www.annalsofgeophysics.eu/index.php/annals/article/view/5119
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