Page 114 - Navy Journal 219

Navy Journal 2019

e. Retaining wall. Retaining wall, also known by the name of "crib faces"
are special supporting walls made of head grids prefabricated in reinforced
concrete or wood. The heads have a length of about 1–2 m and the wall can
reach 5 m in height. Compacted granular material is inserted in the spaces
of the grid. The modularity of the system confers notable flexibility of use,
both in terms of adaptability to the ground morphology.

Fig 10: Retaining wall to prevent landslide

RETAINING WALL SLOPE
(CUT, FILL OR NATURAL)

f. Thermo-Mechanical Treatment. Another method for improving the
mechanical characteristics of the ground is thermal treatment of potentially
unstable hillsides made up of clayey materials. Historically, unstable
clayey slopes along railways were hardened by lighting of wood or coal
fires within holes dug into the slope. In large diameter holes (from 200 to
400 mm.), about 0.8-1.2m apart and horizontally interconnected, burners
were introduced to form cylinders of hardened clay. The temperatures
reached were around 800 °C. These clay cylinders worked like piles giving
greater shear strength to the creep surface. This system was useful for
surface creep only. Other stabilization attempts were made by using
electro-osmotic treatment of the ground. This type of treatment is
applicable only in clayed grounds. 7

106