N 231, Schiphol-Oost HOLLAND – 2000
Roads (01-018-A)
01-018-A – pag 2/3
Problem Bad subsoil, widening of the road embankment through frontfill.
Cubic Area: approx. 3,400 m3. Load: Approx. 20,000 vehicles/day.
Composition Road bed 3.5 cm asphalt wearing course 0/11; 4.0 cm asphalt binder 0/16; 6.0 cm asphalt base course; Geogrid in transition areas; 7.0 cm asphalt base course; 30.0 cm recycled concrete. Base LecaÂŽ in varying thicknesses, up to approx. 2.5 m. Subsoil Soft subsoil.
Construction
Cross-section: Embankment fill and detail of road superstructure.
Site plan: Embankment fill on the cycle lane side.
construction is
01-018-A – pag 3/3
Building method 1. Removal of the topsoil; 2. Creation of support structure from sand materials; 3. Layered application of the Leca® fill; 4. Construction of the superstructure.
Quality control No data.
Performance
Maintenance work Not known.
Appraisal/Experiences Variation in the oedometric modulus leads to differences in load-bearing performance –› consequence: load causes cracks parallel to the transition between sand and Leca®. Try to avoid transitions on the carriageway as far as is possible.
Measurements No data Flaws/damage Inspection on 21.01.2003 Type: longitudinal cracks in the road surface in transition areas between the Leca ® fill and the conventional embankment structure. Time: relatively shortly after completion – around 2-3 years (photos from 2003).
Longitudinal crack in the road surface in the transition area between the expanded clay fill and the conventional fill a) View facing away from the crossroads b) View looking towards the crossroads.
www.maxit-group.com maxitGroup AB, Box 415, SE-191 24 Sollentuna, Sweden Tel.: +46 (0)8 858 70 64 00, E-mail: info@maxit-group.com
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