Pedemontana Veneta

Crossing beneath the route of the Superstrada Pedemontana Veneta to divert the Seriola and Brugnola streams, with two PALADEX DN 2000 pipelines in class SN 16.

Location
Superstrada Pedemontana Veneta
Scope
Crossing and stormwater drainage
Year
2016
Installation of two PALADEX DN 2000 pipelines beneath the Pedemontana Veneta

The works

ClassC = SN 16
Internal diameter2000 mm
Quantity250 m

The design comprises two reinforced concrete structures, an inlet structure with two manual sluice gates and an outlet structure that splits the flows between the channels, connected by two parallel pipelines of about 100 metres each that act as an inverted siphon. Upstream, the connection to the Roggia Breganze is made via an earth channel; downstream, the flow is divided between the Roggia Brugnola to the west and the Roggia Seriola to the east.

After excavation to design level, the pipelines were laid, welded internally with a manual extruder and covered with sand, lean concrete and double-layer mesh.

The results

The site team appreciated the ease of installation and handling and the greater accuracy in aligning the pipeline. Assembly was completed in a very short time. The internal welding achieved hydraulic tightness above 2 bar, more than 4 times the value required by the standard.

Hydraulic performance also improves, thanks to very low roughness coefficients and the absence of sockets, which limits solid deposits.

The article

Excavation for laying the pipelines
Pedemontana Veneta: the excavation at design level before laying
Laying a PALADEX DN 2000 pipeline
Pedemontana Veneta: laying a PALADEX DN 2000 pipeline, class SN 16
The two PALADEX DN 2000 pipelines side by side
Pedemontana Veneta: the two PALADEX DN 2000 pipelines side by side, operating as an inverted siphon
Internal welding with a hand-held extruder
Pedemontana Veneta: internal welding with a hand-held extruder, watertight above 2 bar
Pedemontana Veneta construction site with PALADEX pipelines
Pedemontana Veneta: the construction site beneath the expressway alignment

Source: Servizi a Rete, September–October 2016

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