Reinforced wall with strain monitoring

Reinforced wall with strain monitoring

N138 Saint Saturnin bypass, France | MDB Texinov

The national road N138 goes over the Antonniere river (West of France, Département de la Sarthe). The local road authority decided to build a bridge abutment made with reinforcing geotextiles and a facing wall using the Leromur® process. The wall combines geotextile layers ensuring stability with a concrete blocks facing and looks like a traditional rock facing wall.
Moreover, a system for a periodic measurement of elongation was installed in the reinforced structure.

Specifications:
Bridge 10m high
Backfilling materials: powdered, good friction angle, no cohesion
high pH conditions (> 9)

N138 Saint Saturnin bypass, France | MDB Texinov

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Technical solution:
Reinforced wall with Texinov geogrid PP 150/50 made of polypropylen, alkali resistant, layers spacing 0,39m
The special warp knitted textile construction of this geogrid makes it together highly resistant and easy to handle, to unroll and to install.
Facing: Betoconcept Leromur® system
Strain monitoring: fibre optics sensor Tencate Geodetect®

During all the lifetime of the construction,   deformations are controlled. This innovative project was granted with the IVOR label from DRAST, French Ministry of Transport.