Reinforced Soil Structures

VEGETATED REINFORCED SLOPE

Reinforcement, drainage and vegetation cover as one system.

Reinforced soil slope with a fully established vegetation cover over the whole face.
SYSTEM BUILD-UP

TYPICAL SECTION · VEGETATED REINFORCED SOIL SLOPE

Reinforced soil slope with a vegetated face: layered reinforcement, drainage and protective mesh.

VEGETATED SLOPE FACE

with protection net

PRIMARY REINFORCEMENT

HG-U geogrid · 0.5 m spacing

REINFORCED FILL

compacted in layers

DRAINAGE LAYER

500 mm crushed stone

BENCHED EXCAVATION

bench ≥ 2 m

FOUNDATION SOIL

HLG · F-01 · TYPICAL SECTION · VEGETATED REINFORCED SOIL SLOPE 10.0 m11.1 m21.6 m 1V : 0.75H 1V : 0.75H L = 16.0 m L = 22.0 m 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1VEGETATED SLOPE FACEwith protection net 2PRIMARY REINFORCEMENTHG-U geogrid · 0.5 m spacing 3SECONDARY REINFORCEMENTshort 4TRI-AXIAL GEOGRIDHG-T 5REINFORCED FILLcompacted in layers 6CLAY SEAL0.5 m 7CREST DRAINAGE DITCH 8BENCH DRAIN0.4 × 1.0 m · at 10 m 9DRAINAGE PIPEφ10 10DRAINAGE LAYER500 mm crushed stone 11FILTER LAYERgeotextile and stone 0.4 m 12TOE WALLand drainage ditch 13BENCHED EXCAVATIONbench ≥ 2 m 14BACKFILLand original ground 15GROUNDWATER LEVEL 16FOUNDATION SOIL TYPICAL SECTION · VEGETATED REINFORCED SOIL SLOPERedrawn from the construction drawing of a completed project · levels, borehole numbers and chainage removedHLG · F-01 LEGEND Primary reinforcement Secondary reinforcement Reinforced fill Original ground surface Crushed stone · drainage Original ground / backfill C20 / C25 plain concrete Section redrawn from the construction drawing of a completed project; levels, borehole numbers and chainage removed. Number of reinforcement layers, reinforcement length, slope steepness and drainage detailing are determined by project-specific design.

◀ drawing is wider than the screen · scroll ▶

TYPICAL SECTION · VEGETATED REINFORCED SOIL SLOPE TYPICAL SECTION · VEGETATED REINFORCED SOIL SLOPE 1V : 0.75H 1V : 0.75H L = 16.0 m L = 22.0 m 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1 VEGETATED SLOPE FACE with protection net 2 PRIMARY REINFORCEMENT HG-U geogrid · 0.5 m spacing 3 SECONDARY REINFORCEMENT short 4 TRI-AXIAL GEOGRID HG-T 5 REINFORCED FILL compacted in layers 6 CLAY SEAL 0.5 m 7 CREST DRAINAGE DITCH 8 BENCH DRAIN 0.4 × 1.0 m · at 10 m 9 DRAINAGE PIPE φ10 10 DRAINAGE LAYER 500 mm crushed stone 11 FILTER LAYER geotextile and stone 0.4 m 12 TOE WALL and drainage ditch 13 BENCHED EXCAVATION bench ≥ 2 m 14 BACKFILL and original ground 15 GROUNDWATER LEVEL 16 FOUNDATION SOIL Redrawn from the project construction drawing; levels and borehole numbers removed. Layer count, reinforcement length and drainage are set by project-specific design.
HLG · F-01Redrawn from the construction drawing of a completed project · levels, borehole numbers and chainage removed

SYSTEM CAPABILITY

The table below sets out the typical capability of the system and the corresponding values recorded on a completed project.

PARAMETERSYSTEM CAPABILITYCOMPLETED PROJECT
SLOPE STEEPNESSSYSTEM CAPABILITYup to 1V:0.5H≈63°COMPLETED PROJECT1V : 0.75H
HEIGHTSYSTEM CAPABILITYby designset by soil, loads and engineering calculationCOMPLETED PROJECT21.6 mtwo benches, 10.0 m and 11.1 m
REINFORCEMENTSYSTEM CAPABILITYHG-U geogriduni-axialCOMPLETED PROJECTL = 16.0 / 22.0 m0.5 m spacing

Values depend on soil, fill, groundwater, loads and engineering calculation.

Number of reinforcement layers, reinforcement length, slope steepness and drainage detailing are determined by project-specific design.

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