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March 2008 February 2008 Esk Mill Danby Ground Investigation Earthworks Emergency Works to Scottish Rail Network January 2008 Quality, Health and Safety and Environment North Field, Filton, Sewer Tunnels December 2007 Clay Cross South Feasibility Study November 2007 Thames Tideway Tunnel, Concept Design Poor Rock Slope Examinations 2007-2008 October 2007 Cambrian Street Pumping Station, Llanelli August 2007 Barrow DG5 Flood Relief Scheme, AMCO DonelonEarthworks Examinations, 2007-08, Network Rail July 2007 Sustrans, National Cycle Route Network Rail – London North East Territory June 2007 Karachaganak Phase III –WSP facility May 2007 Coventry Station Platform Reconstruction, Galliford Try Rail April 2007 Florence Road, Poole – Flood Alleviation Scheme: Wessex Water March 2007 Hitchin – Resignalling: Westinghouse Rail Systems Calver Mill Weir Restoration Project February 2007 Bradway Tunnel – Network Rail LNE Harrow & Wealdstone Footbridge Repairs, Galliford Try Rail January 2007 Park Place, Croydon – McNicholas Construction Services Ltd Sough & Watford Fast Tunnels – AMCO Rail Hidden Shaft Investigation works for Network Rail, LNW, AMCO Rail
Bramhope Tunnel – Network Rail LNE DAL have been awarded a contract by Network Rail LNET to undertake remedial design schemes to structures associated with Bramhope Tunnel, near Leeds. The first part of the remit is to undertake a feasibility study of the Sighting Tower located on Bramhope Moor to determine whether it can be repaired or needs to be reconstructed. The stone-built Tower is one of two towers that were erected during the construction of the tunnel to assist with setting out – the other tower has been demolished – and it originally had timber stairs and a viewing platform which are now collapsed. The second part of the remit is for the detailed design of remedial works to the Weeton Portal which is at the northern end of the tunnel. This again is a stone built structure and has some interesting feature castellated towers and turrets. The remedial works will include the replacement of missing stone copers, repairs to cracking, reinstatement of missing window mullions, improvements to drainage and the installation of anti-vandal measures. Both parts of the remit are to be completed by early July 2008.
Esk Mill Danby Ground Investigation – Network Rail LNE Fast flow in the River Esk has resulted in erosion of the river bank adjacent to a railway embankment at Esk Mill, near Danby, in the North Yorkshire Moors. The embankment lies on sidelong ground and the natural hillside above the railway is also displaying signs of distress. In order to manage the risk of failure of the embankment, Network Rail appointed Donaldson Associates to undertake a desk study ground investigation and implement a monitoring scheme to determine the stability history, site history and underlying ground conditions of the site. A detailed topographic survey of the site is also required. Earthworks Emergency Works to Scottish Rail Network – Edmund Nuttall Ltd Recent bad weather across Scotland has resulted in a number of earthworks failures on the rail network. Two of the failures caused closure of the lines due to blockage or loss of support, with the failed material in other cases lying adjacent to the sleepers. Network Rail tasked their Minor Works Framework Contractor, Edmund Nuttall Ltd with reinstatement of the earthworks on an emergency basis. Edmund Nuttall commissioned Donaldson Associates to design the work, supervise construction and provide reports on the cause of each event.
Quality, Health and Safety and Environment DAL is delighted to announce that it has been successful in obtaining full accreditation for ISO 14001:2004, ISO 9001:2000 and OHSAS 18001:1999 with NQA Limited. These accreditations cover all our offices nationally and were awarded in October 2007. In our commitment to continually improve systems and ensure compliance with Quality, Environmental and Health and Safety legislation, DAL has recently invested in a new fully electronic Integrated Management System (IMS) which has been implemented and well-received by both staff and clients. North Field, Filton, Sewer Tunnels – Peter Brett Associates Peter Brett Associates have commissioned Donaldson Associates to prepare a feasibility report and preliminary design for a new foul sewer tunnel to connect a new development to the existing Frome Valley Relief Sewer. The proposed tunnel will be used to pick up the sewage from 2200 new dwellings and from 8000 square feet of new commercial buildings. The two main options for the proposed 1.2km tunnel to be considered are either a small bored tunnel (900mm diameter pipejack) or a large bored tunnel (1800mm diameter pipejack). East Whitwood Feasibility – May Gurney Ltd In order to manage the risk of failure of the East Whitwood embankment, May Gurney appointed Donaldson Associates to undertake a detailed feasibility study and ground investigation to determine the stability history, site history and underlying ground conditions of the site. A detailed topographic survey of the site is also required, facilitating stability analysis for the site and remedial solution optioneering.
Clay Cross South Feasibility Study Following the report of slipped material from a cutting face encroaching within 1.5m of the London bound cess rail of the 100mph St. Pancras to Chesterfield railway line, Network Rail undertook emergency remedial works comprising slope re-grade and the installation of slope drainage. In order to reduce the risk of similar future failures, Network Rail has appointed Donaldson Associates to undertake a feasibility study for drainage improvements and slope repairs throughout the ¾ long cutting. The works will comprise of a detailed desk study, ecological survey, full topographic survey, ground investigation, walkover survey and the installation of rows of nylon survey points for subsequent stability monitoring.
Thames Tideway Tunnel, Concept Design Donaldson Associates has been engaged as a sub-consultant by Faber Maunsell to assist with the development of a concept design for the Thames Tideway Project. This Thames Water £2.2 billion scheme comprises 32km of 7 metre diameter tunnel running underneath the River Thames from Hammersmith to Beckton. Its purpose is to intercept flows from 36 unsatisfactory combined sewer overflows which presently discharge into the river during storm conditions. Donaldson Associates forms part of the Faber Maunsell/Mott McDonald study team which will recommend a concept to be taken forward to detailed design. Poor Rock Slope Examinations 2007-2008 Following the successful completion of the 2005/2006 Rock Slope Examinations, Donaldson Associates has been appointed by Network Rail to undertake the re-examination of 66 No. Poor rock slopes in London North East Territory (LNET) as part of their cyclic earthworks examinations for 2007/2008. These examinations are to be carried out using the Network Rail prescribed system known as Rail Rock Slope Risk Assessment (RRSRA). Each slope will be subjectively assessed by the examiner and a Subjective Risk Rating assigned to it. Each sub-section of slope will be given a Rock Slope Hazard Index (RSHI) classification in accordance with the Network Rail Standard for Examination of Earthworks (NR/SP/CIV/065).
GSM-R Scheme Donaldson Associates was appointed as a Designer to Edmund Nuttall Ltd for their D&C contract for the GSM-R scheme, which involves the installation of Telecoms/communications equipment at many sites across the LNWT rail network. DAL were awarded an initial set of six sites in the Gloucester area, then further sites at Wigan and Penrith. Designs were carried out for the installation of masts and REBs and some Undertrack crossings. DAL was also contracted to carry out the site investigations with boreholes being drilled at all of the sites, together with insitu SPT and resistivity testing. Cambrian Street Pumping Station, Llanelli DAL has been appointed to act as Civil & Geotechnical Engineering designer for the project from feasibility state through to detailed design stage. The project aim is to improve the overflow measurement and performance for the Cambrian Street pumping station whose overflow / outfall pipe is currently partially submerged in estuary silt and so cannot be accurately monitored. Currently at feasibility stage, the restricted site size, proximity to a tidal river, complex geotechnics and >10m deep structure are dictating close working between client, contractor and designer to evolve a co-ordinated design for temporary and permanent works design which satisfies the design brief and client requirements.
Barrow DG5 Flood Relief Scheme, AMCO Donelon DAL has been appointed by AMCO to undertake the temporary works design for the Barrow Flood Relief Scheme. The aim of the scheme for United Utilities is to remove 65 properties from the DG5 flood register. The works comprise a 23m diameter storage tank with a 2.1m internal diameter tunnel approximately 500m in length constructed through interbedded Glacial clay and Glacial sand and gravels. DAL will design for the proposed tunnel lining, timber headings, temporary steel frames in the shafts for launch and reception of a pipejack and settlement assessment. Earthworks Examinations, 2007-08, Network Rail DAL has been appointed for a fifth consecutive year as earthworks examination consultant to Network Rail Scotland. The contract involves examination of railway embankments and cuttings over the entire 1600 miles of railway line in Scotland and the subsequent assessment of risk and preparation of reports for submission to Network Rail.
Sustrans, National Cycle Route DAL has been appointed by Sustrans to work with them in developing the first stage of Route 78 of the National Cycle Network. The proposed cycle and walkway runs from Oban to Fort William through beautiful scenery in the Highlands of Scotland. DAL is engaged as designer on Phase 1c of the works which involves the upgrading of the solume and structures over several miles of dis-used railway. Network Rail – London North East Territory In May 2006 Donaldson Associates was appointed by Network Rail to undertake monitoring of existing instrumentation on problematic railway embankments and cuttings throughout the London North East Territory, from North London to Marshall Meadows in the northeast of England and Fenton in the northwest of England. The contract comprised 3 monthly visits to 68 sites to read in excess of 700 inclinometers and piezometers and in excess of 900 survey pegs over a twelve month period through successful partnership with Geotechnical Engineering Limited and Soil Instruments Limited. Following successful completion of this contract, Donaldson Associates was awarded the follow-on Contract for monitoring during the 2007/2008 Network Rail financial year.
Karachaganak Phase III –WSP facility Phase III development works at the Karachaganak Oil and Gas field in Kazakhstan include the need for waste storage polygons (WSPs) to provide temporary storage for waste from the drilling process. The WSP’s will provide approximately 120,000m³ of storage volume and will be covered with roof structures which limit snow, rain and wind blown sand ingress. Donaldson Assiociates Ltd have been commissioned by Petrofac Engineering Ltd to undertake design works in 3 stages over an 11 month period: A) Options and concepts report; B) Design for construction tender purposes; C) Detailed design for construction. Teignmouth, ENL In July 2007 Edmund Nuttall Ltd was requested to undertake emergency repair works to a collapsed culvert which was causing subsidence to the railway near Teignmouth in Devon. DAL was requested to provide a design solution to the problem and supervise construction of the works. The solution comprises a new 600m diameter culvert installed by micro-tunneling techniques together with grouting of the existing culvert and disturbed section of embankment. The scheme is on the tidal shore of the River Teign and will involve temporary works and sequencing of the construction to overcome the tidal constraint. DAL will also undertake the temporary works design including the drive and reception pits, headwalls and reprofiling of the inlet and outlet channels.
Coventry Station Platform Reconstruction, Galliford Try Rail DAL has been engaged by GTCR for the repair work at Coventry station for 4 no 300m+ platforms. The existing platform walls are of pre-cast concrete construction that is life expired. DAL will undertake track geometry surveys along with gauging surveys to allow a new platform wall and cooper alignment to be designed. The new platform walls will be of PCC block design. The numerous existing services and station hardware will also need to be accommodated within the new scheme.
Contractors Assurance Case We are delighted to advise our clients that DAL has successfully achieved the full Contractors Assurance Case for Network Rail. The certificate is valid from 4th April 2007 until 4th April 2010, certificate number FAC/2087/01. Florence Road, Poole – Flood Alleviation Scheme: Wessex Water DAL has been commissioned by Wessex Water to undertake the detailed design of a sewerage improvement scheme at Florence Road and Bournemouth Road, Poole. The purpose of the scheme is to protect a number of properties (DG5) from flooding from the public sewer system. The scheme will generally comprise: detailed hydraulic design, 3 no. storage shafts, approximately 480 metres of micro-tunnel tank sewer, online replacement of 125 metres of sewer and a submersible pumping installation.
Calver Mill Weir Restoration Project DAL have been appointed by Calver Weir Restoration Project to produce a preliminary design for remedial works to a Grade II listed stone masonry faced dam built in 1778 which acts as a weir on the River Derwent at Calver in Derbyshire. Originally the “S” shaped weir controlled the level of water in the river and allowed water to be diverted into a “goyt” to power the water wheels for the nearby Calver Mill. Although the mill is no longer in operation the weir still functions as a dam across the river. Over the years there have been several repairs to holes in the weir but these have been generally emergency repairs with no overall maintenance plan. Our commission is to produce a plan to reinstate the structural and hydraulic integrity of the weir and carry out more sympathetic and effective repairs to the weir faces. Hitchin – Resignalling: Westinghouse Rail Systems DAL has been appointed to undertake all civil engineering design and documentation for the structural elements on the Hitchin re-signalling project on behalf of Westinghouse. The project consists of the site investigation, Form A and Form B design of 50 signals and 20 up/down location platforms with 50 further location cases positioned on ground bases. Site investigation will take the form of SPTs and a detailed geotechnical desk study will be undertaken. The civil design work is required to support a GRIP 4 scheme which will include a single form A document containing generic foundation designs.
Bradway Tunnel – Network Rail LNE Following successful completion of investigation and feasibility studies, DAL has been appointed by Network Rail London North Eastern Territory to prepare a Form A (outline design) for major repair works to Bradway tunnel on the Midland Main Line between Sheffield and Chesterfield. The works are due to be carried out during a blockade of the line planned for 2008/9. The remedial works are to control water ingress into the tunnel to limit the effect of ongoing deterioration and control the rate of deterioration in existing repair areas using a sprayed concrete lining or injection of the existing brickwork as appropriate. Harrow & Wealdstone Footbridge Repairs, Galliford Try Rail DAL has been appointed as designer for Galliford Try Rail for the refurbishment of the footbridge at Harrow and Wealdstone Station in North London. This is an early example of a four span cyhalf through girder bridge of riveted construction and is listed due to the status of the station itself. The main girders are to be strengthened which requires the removal of the windows and propping of the roof structure whilst new plates are installed. The strengthening plate installation needs to be carefully sequenced to avoid affecting the load-bearing capacity of the bridge in the temporary state. The windows will be replaced on completion, sympathetic to the original structure
Park Place, Croydon – McNicholas Construction Services Ltd The Park Place Retail Development will form a significant part of the regeneration of retail facilities in central Croydon. DAL was appointed by McNicholas Construction Services Ltd to carry out the design of service diversions required to clear the site for the Park Place Retail Development. The service divisions are to be designed using a common trench philosophy to avoid the road being closed for installation of each service in turn. The works will include open cut trenches, tunnels and shafts, installation of ducts and pipework etc. A new car park exit tunnel is also required in Katharine Street. This is likely to be constructed by cut and cover techniques with a BT diversion in bored tunnel running underneath and perpendicular to it. This is a technically and logistically demanding project. Sough & Watford Fast Tunnels – AMCO Rail As part of Network Rail’s investigation into lining ring separation in tunnels, DAL has been appointed by AMCO Rail to undertake detailed condition surveys of both Sough and Watford Fast tunnels and prepare reports on the results of the condition and Acoustic Energy Meter Surveys for each of the tunnels. Similar surveys have already been carried out in Disley and Bradway tunnels. Hidden Shaft Investigation works for Network Rail, LNW, AMCO Rail DAL has been appointed by AMCO Rail to direct and prepare reports on the search for a total of some 16 hidden shafts in Halton, Dudley, Bangor and Llandegai tunnels. The shaft locations in the tunnel are found by probe drilling and endoscope surveys. The TMS documents prepared for Network Rail by DAL provide the basis of the search for the shafts. The investigation methods are similar to those used to locate hidden shafts in Bramhope tunnel.
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