Construction chart
Construction sequence
1. Positioning and driving or vibrating of steel H beams at regular spacing. A vibration less method such as drilling may be applied to insert the H-beams (s métalliques)
2. At the first phase of the earth moving works, as excavation proceeds, installation of lagging consisting of wooden planks, precast concrete slabs or steel H sections.
3. Eventual anchoring of the wall (depending on the project and application)
4. Final phase of the earthwork, placement of the horizontal sheeting terminated – finished embedded retaining wall
Fields of application
• Very economical retaining wall (shoring) system in excavations
• Earth retaining wall, absence of groundwater over the retained height in the excavation area.
• Not water retaining (the wall is permeable)
• Excavations of limited area / confined spaces
Environmental impact
• Vibration and noise pollution
• A stable, dry and flat work platform is needed
• Not recommendable next to vibration-sensitive constructions (impact of vibrations) (cf. CSTC installation guidelines type 1 and type 2)
• Flexible system – if necessary, placement of anchors or additional shoring (strutting) to limit large displacements.
Technical specifications
• Shoring system used only as an earth retaining structure
• Applicable only if the groundwater level is lower than the maximum excavation level
• Temporary cohesion of the soil is needed in order to carry out the excavation and place the horizontal sheeting.
• Soil removal: depending on the construction process
• If necessary, placement of complementary anchors
• Depth: 12 to 15 m
• Retained height between 3 and 6 m
• Wall thickness / width: 0.20 to 0.40 m
