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ROAD, RAIL & WATERWAY BRIDGES

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Foundation lowering - new Forth Crossing Lifting complete bridge above flood level Long-term motorway bridge work
Bearing replacement Pre-stressing box girders Foyle Bridge N. Ireland Bridge slide on A38

We have broad experience in projects involving the controlled hydraulic movement of road, rail and waterway bridges using a wide range of hydraulic jacks and ancilliary equipment. A brief overview is highlighted in the images above. During these projects we work closely with the appropriate local authorities, national bodies, contractors and civil engineers. Our aim is to provide professional services that cause minimum disruption and maximum safety. Before any hydraulic jacking can take place, considerable planning and preparation takes place to ensure the jacks provide exactly right forces at exactly the right place and time. This typically involved additional support frames and structures. Health and safety considerations throughout our projects are of paramount importance.

BRIDGE SLIDING

Bridge sliding is a particular speciality for Bill Boley Ltd. Complete replacement bridge sections, weighing over 1000 tonnes, can be built alongside existing roads or rail lines and then pulled into position along rails using jacking sleds and strand jacks. This part of the process can be carried out in a matter of hours, thereby ensuring road or rail closures are kept to a minimum.

You can see an example on our Video page showing how a new rail underbridge is pulled into place, having been built next to the railtrack to allow the construction of a new dual carriageway road under the railway for the South Bristol Link Metrobus project.

LIFTING LOWERING PROPPING BEARING REPLACEMENT GEODETIC MONITORING
SLIDING TENSIONING STRESSING STRAND JACKING WEIGHING

Projects range from short term lifting for repair work, through to long term work lasting months or even years. Our work is carried out to meet specific client's requirements and cause minimise disruption.

In most applications the jacking processes are computer controlled for optimum precision and control. During the jacking procedures we utilise a range of sensors for monitoring position, displacement and force. We also use geodetic monitoring for specific applications, especially longer term projects.

More information about our capabilities in the hydraulic movement of road rail and waterway bridges can be found in the following case studies.

Long term load monitoring and jacking on M4 bridge Jn 13 adjacent to Chievley Services Download>>>
Lowering underwater frame-work for the foundations of the new Forth Crossing in Scotland Download>>>
Aligning bridge sections above the M40 near Warwick using 250 computer controlled jacks Download>>>
Sliding a complete new bridge section of the A38 in Devon. The work was carried out over the week-end to avoid congestion Download>>>
Pre-stressing the internal box girders of the Foyle road bridge in Northern Ireland Download>>>
Positioning and supporting temporary bridge deck so unsafe bridge could be replaced without affecting rail services below Download>>>
Lifting concrete slabs weighing 40 tonnes to strengthen bridge in Glasgow under very confined conditions Download>>>
Lifting, weighing and tensioning complete foot bridge section installed across the River Severn in Shropshire Download>>>

 

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