Trade 01 · Civil works · Core trade
Civil works
Trenches, house connection trenches, hand excavation, traffic management and surfaces – with our own equipment and crews.
1Services
Cable and utility trenches
Open-cut construction in roads, footpaths and open ground: breaking up, excavation, laying and backfill compacted in layers.
House connections
From the distribution point to the house wall: connection trenches and building entries for fibre and utility lines.
Crossings
Road, path and driveway crossings – coordinated with the road authority and traffic authority.
Traffic management
Site safety according to the traffic order, so residents, pedestrians and traffic can pass safely.
Surface reinstatement
Asphalt, paving, slabs and green areas – restored as found.
Documentation
Measurements, photo documentation and as-built records for network operators and clients.
2Service items
What we take on in civil works – as items, the way they appear in the bill of quantities.
| Item | Service | Description | Unit |
|---|---|---|---|
| 01.10 | Open-cut cable trench | Breaking up, excavation and shoring, laying in the sand bed, backfilled and compacted in layers – in footpaths, roads and open ground. | m |
| 01.20 | House connection trench | From the branch on the route to the house wall – coordinated with owner and network operator. | pc |
| 01.30 | Hand excavation | By hand at existing utilities, in root zones and wherever an excavator cannot reach. | m |
| 01.40 | Surface reinstatement | Paving, slabs, asphalt and green areas – restored as found. | m² |
| 01.50 | Traffic management | Site safety according to the traffic order: beacons, barriers, signage. | LS |
| 01.60 | Measurement and photo documentation | Measurements and photos with time and location stamp for network operators and clients. | LS |
3Methods
| Method | Use | Kalwer Netzbau |
|---|---|---|
| Open-cut construction | Routes in footpaths, roads and open ground | own crews |
| Hand excavation | House connections, existing utilities, root zones | own crews |
| Paving and asphalt work | Surface after backfilling | own crews |
| Soil displacement (impact mole) | House connection under driveway or garden | through partner firms |
| Directional drilling (HDD) | Road and watercourse crossings | through partner firms |
| Microtrenching | Narrow routes in asphalt | through partner firms |
4Standard cross-section
A cable route in cross-section: surface, base course, backfill, warning tape, sand bed and duct bundle. Kalwer Netzbau builds every layer itself.
01 · Civil works
Trench
Breaking up, excavation and shoring, then backfilling and compaction in layers.
02 · FTTH · Fibre
Duct
Microduct bundle and cable ducts to DIN 16874 in the sand bed with warning tape above; then blowing and splicing.
03 · E-mobility
Connection
Cable route to the charger's foundation, installation and commissioning of the station.
04 · Surface
Finish
Asphalt or paving reinstated and joined to the existing surface.
5Construction sequence
Site visit and quotation
We inspect the route on site and then send you a written quotation.
Permits
Excavation permit and traffic order are obtained before work starts.
Breaking up and excavation
The surface is cut and removed, the trench excavated and secured.
Laying
Ducts and cables are laid in the sand bed, with route warning tape above.
Backfill
Backfilled and compacted in layers so that nothing settles later.
Surface
Asphalt or paving is reinstated.
Acceptance and documentation
Handover with measurements, photos and as-built records.
6Photos
Enlarge photo
Enlarge photoEnlarge photoEnlarge photoEnlarge photo7Enquiry
Enquire: Civil works
This trade's items can be carried straight into the enquiry form.
Contact
Request a project
Send us your bill of quantities, route plan or simply location and scope. We will get back to you personally.
- Contractor
- Kalwer Netzbau, Bergedorf
- Phone
- 040 66969 120
- Mobile
- 040 66969 121
- 040 66969 121
- Contact person
- Jens Kalwer · j.kalwer@kalwer-netzbau.example
- Working hours
- Monday to Friday, 8 am – 5 pm