Rail Work
Monday, May 18, 2009
Over the years HRS have inspected literally 1000's of rail structures. Bridges, shafts, station roofs, culverts down to lowly cattle creeps; confined spaces under platforms up to spaces the size of cathedrals in bridge abutments have all been accessed safely and works carried out.
Numerous consulting engineers have drawn on our wide range of skills to extend their project capability. Centred on difficult access, HRS Services can support inspection, surveying, testing and sampling and maintenance jobs as required. We effectively co-ordinate and manage all aspects of the access and site works freeing up engineers to carry out their contracts, more cost effectively.
Major Structures worked on have included bridges-Forth, Tay, Tamar, Newcastle High Level; stations - Kings Cross, Liverpool Street.
A condition survey of the concrete deck, piers and cable stays of the Flintshire Bridge in North Wales has recently been completed by consulting engineer Pell Frischmann in conjunction with roped access specialist HRS Services. The bridge carries a dual two-lane highway over the navigation channel of the Dee estuary.
The structure has approach viaducts totalling 660m in length, and a 118m high inverted Y-shaped tower supporting the 194m-long main span and 100m of back spans. The tender for the principal inspection of the bridge was put out by Gifford on behalf of Flintshire County Council.
The shape and location of the bridge poses particular problems for inspections, and Pell Frischmann engineers trained in roped-access worked with HRS to access all areas of the structure.
The arrangement allowed Pell Frischmann to concentrate on the engineering aspects of the contract, leaving HRS to manage the access arrangements and proposals. The contract was won on the strength of the detailed proposal and method statement. All parts of the bridge had to be inspected hands-on, so a range of access equipment and methods was required.
These included 20m mobile access platforms for reaching the soffits and access hatches to the internal confined space deck voids; a 54m platform for the lower part of the main tower and roped-access techniques for the upper tower and cable stays. In order to inspect the underside of the deck above the river, HRS fabricated a lightweight aluminium movable truss which was sequentially moved under the 30m-wide deck in a longitudinal direction.
This provided a stable basis for inspection whilst imparting manageable loads on the delicate parapet detail and producing benefits in time, quality of inspection, cost and flexibility.
Numerous consulting engineers have drawn on our wide range of skills to extend their project capability. Centred on difficult access, HRS Services can support inspection, surveying, testing and sampling and maintenance jobs as required. We effectively co-ordinate and manage all aspects of the access and site works freeing up engineers to carry out their contracts, more cost effectively.
Major Structures worked on have included bridges-Forth, Tay, Tamar, Newcastle High Level; stations - Kings Cross, Liverpool Street.
A condition survey of the concrete deck, piers and cable stays of the Flintshire Bridge in North Wales has recently been completed by consulting engineer Pell Frischmann in conjunction with roped access specialist HRS Services. The bridge carries a dual two-lane highway over the navigation channel of the Dee estuary.
The structure has approach viaducts totalling 660m in length, and a 118m high inverted Y-shaped tower supporting the 194m-long main span and 100m of back spans. The tender for the principal inspection of the bridge was put out by Gifford on behalf of Flintshire County Council.
The shape and location of the bridge poses particular problems for inspections, and Pell Frischmann engineers trained in roped-access worked with HRS to access all areas of the structure.
The arrangement allowed Pell Frischmann to concentrate on the engineering aspects of the contract, leaving HRS to manage the access arrangements and proposals. The contract was won on the strength of the detailed proposal and method statement. All parts of the bridge had to be inspected hands-on, so a range of access equipment and methods was required.
These included 20m mobile access platforms for reaching the soffits and access hatches to the internal confined space deck voids; a 54m platform for the lower part of the main tower and roped-access techniques for the upper tower and cable stays. In order to inspect the underside of the deck above the river, HRS fabricated a lightweight aluminium movable truss which was sequentially moved under the 30m-wide deck in a longitudinal direction.
This provided a stable basis for inspection whilst imparting manageable loads on the delicate parapet detail and producing benefits in time, quality of inspection, cost and flexibility.
Labels: rail work
