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   Contention walls

Contention walls

CONTENTION WALLS ARE USED TO HOLD
BACK MASSES OF EARTH OR OTHER LOOSE MATERIALS WHEN
THE CONDITIONS DO NOT ALLOW THESE MASSES TO LIE
AT THEIR NATURAL SLOPES.

These conditions arise when the width of an excavation, cutting or embankment is restricted by the conditions of ownership, use of the structure or economy. For example, in construction of railways or roads, the easement width of the track is fixed and the cutting or embankment must be contained within that width. Likewise, the basement walls of buildings must be located with the party lines of the property and contain the soil around the basement.
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GRAVITY WALLS: GABION

These are those whose weight counters the thrust of the land. Due to their large size, they suffer practically no flection efforts, so they are not usually reinforced.

Under these conditions, the most adequate solution is the gabion wall. Gabion structures provide a wide field of applications in the environment and stabilise land. The basic characteristic of triple twist hexagonal mesh grid is that it facilitates absorption of the efforts borne by these gravity structures.
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REINFORCED EARTH WALLS: TRESMA® AND GEOSYNTHETIC

If an embankment is built using unstable ground or a greater slope than the internal friction angle of the material, the resulting structure will be unstable. Soil behaviour must be improved using materials that may increase their stability. That ensures that the material works as a unit. The importance of reinforcment consists in providing the soil cohesion, decreasing the thrust of the earth the wall has to bear. The construction phase is very important, as one must compact by layers of scarce thickness, to provide the soil greater resistance.

Bianchini has developed specific products with high technical features that allow swift, simple placement, such as Tesma® Verde, Tesma® Gabion and the Geomeshes MACGRID® WG, PARAGRID®, PARALINK and PARADRAIN®. It also guarantees continuous technical support at all levels of the works.
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REINFORCED EARTH WALLS: MACSTARS®

Bianchini provides advice in all kinds of projects and assigns these powerful analysis and calculation tools, such as MacStars®, a software to calculate Reinforced Earth Walls that analyse all the characteristics of your project and calculate the most efficient solution.
The MacStars® program performs the necessary analysis for reinforced wall projects with TRESMA® elements. Taking the properties of the ground as a base (internal friction angle, cohesian and specific weight), the profiles and loads (concentrated, distributed, seismic action, etc.) the program allows analysis of Global Stability, Internal Stability, Overturning and Slipping for Reinforced Earth structures. The methods used in the calculations refer to the Balance Limit Method.

DESIGN SCHEMES OF GRAVITY WALLS WITH GABIONS AND WITH REINFORCED EARTH