Ground model
The topographical survey, five geotechnical boreholes and stability checks established the geometry and sequence of the works. The technical assessment was integrated as a distinct source document underpinning the design.
Case study · Road infrastructure
DN1A, Măneciu. Stabilising an unstable road sector as one engineered system.
Lead design and multidisciplinary coordination for embankment stabilisation, carriageway reconstruction, retaining works and drainage along km 133+450–133+630.
- DN1A
- national road
- km 133+450–133+630
- designed sector
- approx. 180 m
- intervention length
- DALI · PAC · PTE · AT
- completed appointment
01 / Context and objective
The road, the slope and the water regime were assessed together.
The sector crosses mountainous terrain with a documented history of instability. Carriageway settlement, deterioration of the old retaining structures and deficient water disposal pointed to a problem that could not be solved at pavement level alone. The design objective was to stabilise the whole system and restore the road’s function.
02 / Design response
A sector-specific stabilisation strategy, coordinated through to the road details.
TOGES SERV incorporated the topographical data, geotechnical investigation and technical-assessment conclusions into a coordinated design covering the ground, retaining structures, drainage and pavement system.
Retaining structures
Bored-pile systems were configured to suit the individual subsections, connected by reinforced-concrete elements and coordinated with existing structures where the ground conditions allowed.
Drainage and culvert
Slope drainage, lined ditches and replacement of the deteriorated culvert were coordinated so that water could be collected and discharged without reactivating instability.
Road and safety
Reconstruction of the pavement, shoulders, vehicle-restraint system and road markings completes the structural works and restores the sector to serviceable conditions.
03 / Technical basis
From field evidence and analysis to a coordinated design response.
04 / Scope of appointment
TOGES SERV acted as lead designer for the completed design package.
Coordinated disciplines
- Road design
- Stabilisation and retaining structures
- Geotechnical interface
- Drainage, ditches and culvert
- Topographical-data integration
- Technical coordination and assistance
Principal deliverables
- DALI design documentation
- PAC approval documentation
- Technical and detailed design
- Coordinated written and graphical documents
- Cost documentation
- Technical assistance
The published material consists solely of anonymised technical extracts. The client’s identity, the authors of the supporting studies, contract values and administrative documents are not disclosed.
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