Kalvarsky Most - Cyclist Bridge across the River Nitra

Kalvarsky Most - Cyclist Bridge across the River Nitra
© Matus Nedecky

KALVARSKY MOST - CYCLIST BRIDGE ACROSS THE RIVER NITRA

Strasky, Husty a partneri (SHP) + NOPS

CONTRACTOR
Strabag

AUTHOR OF THE ARCHITECTURAL DESIGN
Jiri Strasky (SHP) and Vojtech Varga (NOPS)

DESIGN FOR THE CONSTRUCTION PERMISSION
Martin Formanek (SHP)

GEOTECHNICAL ENGINEERS
WH Geotrend

CLIENT
City of Nitra

TENDER DESIGN AND CONSTRUCTION ENGINEERING
Pavel Kalab (SHP), Vojtech Varga, Anton Bendis (NOPS)

CATEGORY
Bridges, Detail

PHOTOGRAPHS
Matus Nedecky

LOCATION
Nitra, Slovakia

AREA
248 m²

YEAR
2021

Text description provided by architect.

The bridge connects pedestrian and cyclist trails situated along both banks of the River Nitra in a city of the same name.

Kalvarsky Most - Cyclist Bridge across the River Nitra
© Matus Nedecky
Kalvarsky Most - Cyclist Bridge across the River Nitra
© Matus Nedecky

Due to local constraints the bridge structure with a very slender deck was required. Also, any load bearing members, such as pylons and cables, situated beyond the sidewalks were not allowed.

Therefore, an economical tied arch structure, which represents a most logical solution, has been chosen. To allow an un-disturbing view of a historic centre of the city, the rise of the arches is as small as possible.

Kalvarsky Most - Cyclist Bridge across the River Nitra
© Matus Nedecky
Kalvarsky Most - Cyclist Bridge across the River Nitra
© Matus Nedecky

To open the space and to invite using the bridge, the deck is suspended on outwards inclined arch ribs. In this way the river bridging received a modern, dynamic appearance.

The bridge deck is in a crest curve with a maximum longitudinal slope of 5.0%. The span length is 49.50 m, the free width between the railings is 4.00 m.

Kalvarsky Most - Cyclist Bridge across the River Nitra
© Matus Nedecky
Kalvarsky Most - Cyclist Bridge across the River Nitra
© Matus Nedecky

Since the bridge deck is fixed connected with the end abutments supported by micro-piles, the structure forms an integral structural system.

The deck, which is composed of two steel edge girders stiffened by floor beams and precast concrete slab members, is on its edges suspended on steel arch ribs of trapezoidal box sections.

Kalvarsky Most - Cyclist Bridge across the River Nitra
© Matus Nedecky
Kalvarsky Most - Cyclist Bridge across the River Nitra
© Matus Nedecky

To avoid cracks in the concrete deck, the structure is longitudinally post-tensioned by prestressing cables situated in the boxes of the edge girders.

To eliminate the erection towers in the riverbed, the steel deck assembled of edge girders and floor beams was temporary stiffened by ties situated under the edge girders. 

Kalvarsky Most - Cyclist Bridge across the River Nitra
© Matus Nedecky
Kalvarsky Most - Cyclist Bridge across the River Nitra
© Matus Nedecky

After the deck was erected, the steel arches were placed and precast slab members were erected.

When the joints between the members were cast and prestressed, the deck was suspended on the arch ribs.

Kalvarsky Most - Cyclist Bridge across the River Nitra
© Matus Nedecky
Kalvarsky Most - Cyclist Bridge across the River Nitra
© Matus Nedecky

The function of the bridge was verified by static and dynamic loading tests.

The steel structure is painted white, the walking surface is illuminated by LED lights situated in the hand rails.

Both, the arches and edge girders are illuminated by LED lights situated at their bottom flanges.

Kalvarsky Most - Cyclist Bridge across the River Nitra
© Matus Nedecky


Kalvarsky Most - Cyclist Bridge across the River Nitra
© Matus Nedecky
Kalvarsky Most - Cyclist Bridge across the River Nitra
© Matus Nedecky
Kalvarsky Most - Cyclist Bridge across the River Nitra
© Matus Nedecky
Kalvarsky Most - Cyclist Bridge across the River Nitra
© Matus Nedecky


Kalvarsky Most - Cyclist Bridge across the River Nitra
Elevation Plan
Kalvarsky Most - Cyclist Bridge across the River Nitra
Cross Section 


Kalvarsky Most - Cyclist Bridge across the River Nitra
Structure
Kalvarsky Most - Cyclist Bridge across the River Nitra
Structure
Kalvarsky Most - Cyclist Bridge across the River Nitra
Structure