SU3716 : Structural monitoring equipment on old Romsey Road bridge

taken 2 months ago, near to Upton, Hampshire, Great Britain

Structural monitoring equipment on old Romsey Road bridge
Structural monitoring equipment on old Romsey Road bridge
A line of concrete blocks, each stated to be equivalent to five tonnes axle load, were installed across the eastern side of the bridge in 2016. I had not noticed this before, but there is a wire running along the top of these blocks, under tension from the bungee cords, which is connected to some kind of sensor in the black box. That in turn is connected to the siren seen in LinkExternal link . I suppose this wire would get pulled if there was any bowing in the bridge, but it is not what I had expected. Somehow I had expected some strain gauges.
Romsey Road bridge replacement scheme 2018
A concrete bridge carried the A3057 Romsey Road over the M27 motorway at Nursling. It was built in the 1970s and had a design life of 25 years. In 2016 bridge inspectors identified failings in the bearings, meaning the bridge was unable to move as designed. Developing cracks had also been observed in the ends of the pre-stressed concrete beams.

Structural monitoring equipment was installed to give early warning of any deterioration. A 26 tonne weight limit was imposed. Utilities running over the bridge were diverted.

In 2018, a scheme to replace the bridge was implemented. This involved works on the south side of the M27 west of the bridge. It was planned to build a new bridge on site, close the motorway, demolish the old bridge, and move the new bridge into position.

See LinkExternal link for demolition operations over the weekend of September 29 & 30 2018.
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SU3716, 133 images   (more nearby )
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Date Taken
Tuesday, 9 October, 2018   (more nearby)
Saturday, 20 October, 2018
Geographical Context
Lowlands  Roads, Road transport  Construction, Development 
Primary Subject of Photo
Subject Location
OSGB36: geotagged! SU 3758 1689 [10m precision]
WGS84: 50:57.0135N 1:27.9839W
Camera Location
OSGB36: geotagged! SU 3758 1689
View Direction
North-northeast (about 22 degrees)
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Image Type (about): close look 
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