The Challenge:

Our client Severn Trent had a survey conducted on the access road bridge to the Yoxall Waste Water Treatment works. The survey findings showed that the structure was failing and had a maximum capacity of 3 tonnes. The client was made aware by the consultants of the bridges’ failing on Friday 22nd February 2019.

This posed an immediate and significant problem to the client insofar as an 18-tonne sludge tanker was required to enter, load and exit site on Friday 1st March 2019.

The client contacted Kier on Monday 25th February requesting a site visit to discuss potential solutions on Tuesday 26th February.

The Solution:

The ensuing site visit was attended a by a client representative together with relevant suppliers. The agreed solution was to install a Bailey Bridge as a temporary access whilst a permanent bridge solution was engineered.

This solution required some vegetation clearance around the bridge abutments along with removal of the bridge parapet copings. A 3 x 3m stone foundation for Hiab outriggers was set in place. A HIAB was then used to install timber bearing beams to each end of bridge abutments and metal side beams with handrails. handrail. Once decking panels were in place between the side beams, timber retainers were used in preparation for stoning including bagged prop support. Stone was then installed and graded back to road levels from each abutment. Once the stone was compacted a tarmac layer was used to consolidate the access roadway to Bailey Bridge.

The Impact

Reacting to a very short notice the Kier team provided a feasible solution and implemented a plan of works including liaising with the Land Owner and the works manager to facilitate a “clean” install with unimpeded access to the works. The bridge, from initial site visit to completion to enable the sludge tanker access for collection took less than 84 hours in total. A truly remarkable achievement which demonstrated the team’s ability to effectively communicate, adapt and deliver a demanding solution which help to prevent a possible environmental situation should the sludge not be tankered away in a timely fashion.

" This timely and efficient response enabled asset creation to continue their works with no impact, the site to stay operational and not go out of consent and more importantly everyone was kept safe. Great job all around "
Samantha Colleyshaw Project Manager Severn Trent

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