design of buildings over or near railways - Queensland Rail

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DESIGN OF BUILDINGS OVER OR NEAR RAILWAYS, Revision CQueensland Rail reserves the right torestrict construction methods to those thatminimise interference to train operations,passengers and railway activities.Existing access to Queensland Rail propertyfor maintenance and emergency is to bemaintained at all times during constructionwork.All documentation for the construction ofbuildings is to allow for and include:• MCE-SR-002 Work in or aboutQueensland Rail property, and• MCE-SR-003 Work adjacent to overheadline equipment (where applicable).The drawings are to show:• design loads,• any special provisions, e.g. structuralredundancy and use of precast orprefabricated elements• railway centrelines in the vicinity of theproposed building,• clearances from building to track andOHLE,• railway kilometrage linked to the set out,and• details of all existing railwayinfrastructure, including maintenanceand emergency access under and in thevicinity of the proposed building.All structural drawings, including temporaryworks such as falsework and formwork shallbe certified as having been designed incompliance with the Professional EngineersAct.Prior to construction, copies of the drawingsand documentation consisting of:• overall scope of construction works,• demolition scheme,• collision protection measures,• assessment of risks from dangerousgoods transport with appropriate controlmeasures in the design, and• details of work within / over / adjacent toQueensland Rail property,are to be submitted to Queensland Rail forreview and a compliance check againstQueensland Rail’s Technical Requirementsand Standards.Construction is not to commence untilpermission has been received fromQueensland Rail.3.2 ClearancesClearances to railway tracks are to satisfythe minimum requirements of the following,unless otherwise approved by QueenslandRail:• Queensland Rail Standard Drawing No2754• trackside access roads,• formation drainage,• sighting requirements for railway signalsand level crossings,• special items of overhead traction wiringequipment, e.g. switches, transformers,wiring at turnouts,• passenger platform requirements, and• access to clean and maintain thebuilding.For buildings across existing and futureelectrified lines, the building’s supportstructure is to be located clear of theoverhead wiring system and to haveprotection screens installed in accordancewith Queensland Rail TechnicalRequirement MCE-SR-008 Protectionscreens.The drawings of the proposed building areto show the railway clearance outlinesuperimposed on an elevation of thebuilding at 90° to the track alignment.3.3 Earthquake ProtectionBuildings over or near railways are to beclassified as “importance level 2 structures”for the purposes of AS 1170.4 Structuraldesign actions: Part 4 Earthquake actions inAustralia.Buildings are to be designed to minimise therisk of collapse during earthquakes, withparticular attention being given to:• bearing arrangements,• widths of bearing shelves, and• reinforcing steel in columns.Page 4 of 11
DESIGN OF BUILDINGS OVER OR NEAR RAILWAYS, Revision C3.4 DurabilityThe design life of the building over oradjacent to the railway tracks needs to be aminimum of 100 years.Buildings are to be designed so thatmaintenance will have no effect onQueensland Rail’s operations. No accessfrom the railway corridor is allowed.3.5 Lighting and VentilationA building enclosing the railway is to bedesigned to maximise natural air flow andlighting within the railway corridor. Where abuilding abuts the railway corridor, it is not toproduce lighting or ventilation shafts withinor opening onto the railway corridor. Whereit is determined that artificial light andmechanical ventilation of the railway corridoris required, the building owner or its agent isto provide and maintain:• independent power supply for theseservices, and• back-up plant and power supply toensure continuous light and ventilation incase of failures and emergencies.3.6 DemolitionA building is to be designed so that it can bedemolished progressively without causinginterference to train operations, passengersand any railway activities. A demolitionscheme is to be included in the drawingsand documentation to be submitted toQueensland Rail as required by Section 3.1.4.0 SUBSTRUCTURE - FOUNDATIONSFoundations are to be designed to beinstalled with minimum interference torailway operations.No excavation within or under the railwaycorridor is permitted, unless agreed to byQueensland Rail. Permanent soil nails /rock anchors are not permitted to extendinto the railway corridor. Temporary soilnails / rock anchors may be permitted duringconstruction of the substructure. They mustbe designed not to interfere with railwayinfrastructure. On completion of each levelof the substructure, the temporary soil nails /rock anchors for that level are to be destressed,as agreed by Queensland Rail.The period from commencement ofexcavation until completion of thesubstructure to at least rail level adjacent tothe railway must not be more than 6 months.The design of shoring systems forexcavations adjacent to operating railwaytracks is to be submitted to Queensland Railfor review before construction commences.Foundations are not to interfere with corridordrainage. Provision is to be made forrailway formation drainage. Drains are to belined where appropriate and are to be clearof the track. Piers and foundations are to bedesigned to allow free drainage along theformation and are not to cause ponding. Fordeep excavations next to the corridor, thedesign of the retaining structures is toinclude provision for drainage.5.0 PIERS – COLLISION PROTECTION5.1 GeneralBuildings are to be a single clear span overexisting and future railway tracks, unlessagreed otherwise by Queensland Rail.Collision protection and collision loads are tobe in accordance with AS 5100 BridgeDesign and Queensland Rail TechnicalRequirement MCE-SR-012.5.2 Upgrading of Existing BuildingsExisting piers and columns which do notsatisfy the requirements in Section 5.1 areto have deflection walls provided.Independent deflection walls are to beprovided where space permits. For detailsrefer to Queensland Rail TechnicalRequirement MCE-SR-012.Page 5 of 11
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