CE 515 Railroad Engineering .


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Extension Types. Timber Trestles. Picture sources: http://members.cox.net/sn3nut/trestles section 1.htm. Steel Bridge. Picture Sources: http://upload.wikimedia.org/wikipedia/center/8/85/Forthrailbridgefromsouthqueensferry.jpg. http://farm1.static.flickr.com/225/493880918_adc1e46808.jpg. Solid Bridges.
Transcripts
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CE 515 Railroad Engineering Structures Source: AREMA Ch. 8.3,8.4 "Transportation exists to vanquish space and time - "

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Bridge Types Timber Trestles Steel Bridge Picture sources: http://members.cox.net/sn3nut/trestles%20part%201.htm Picture Sources: http://upload.wikimedia.org/wikipedia/lodge/8/85/Forthrailbridgefromsouthqueensferry.jpg Concrete Bridges Moveable Spans http://en.wikipedia.org/wiki/File:Pegasus_bridge_new.jpg http://farm1.static.flickr.com/225/493880918_adc1e46808.jpg

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Timber Trestles Trestle: an open, propped wooden structure that backings the railroad over the ground level. It comprises of a progression of indistinguishable (or almost so) vertical backings holding up a progression of limited abilities to focus. All wood parts of a trestle are intended to be in pressure and never in strain. Bring down introductory cost, simplicity of development and repair. Found on light thickness lines, branch lines, short lines and transitory intersection. Sources: Trestles – RGS Style Wooden Trestle Construction on the Rio Grande Southern Railroad by Bob Hyman, http://members.cox.net/sn3nut/trestles%20part%201.htm

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Timber Trestles Picture sources: http://www.railtrails.org.au/states/trails.php3?action=trail&trail=91&gallery=666

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Left: Straight Timber Trestle Right: Curved Timber Trestle Pictures sources: http://www.jvmodels.biz/ho_scale_models.htm

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Typical casing bowed trestle Pictures Sourceswww.donet.com/.../trestle/d_n_rg_bent.jpg

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Timber Bent Construction Details Picture Source: http://members.cox.net/sn3nut/trestles%20part%201.htm

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Timber Trestles Stringers: Structural individuals stretching out parallel to the rail and traversing the openings between the bents. Width: 7" - 10 ". Profundity: 14" - 18" Length: 13\' - 15\' Centered under the rail all together that the heap circulation is symmetrical Stringer Arrangement (Curved Trestle) Picture sources: http://members.cox.net/sn3nut/pictures/Trestle%20Clinic%20Images/Figure%207.gif

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Timber Trestles Caps: 12"- 16" in segment, amplify the width of the bowed, usually 13\'- 16\' for single tracks. Exchange loads from stringers to posts or the heap Sills, at the base are tops of similar measurements , yet longer long. Picture sources: http://members.cox.net/sn3nut/trestles%20part%201.htm

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Timber Trestles Timber Connectors: metal rings, plates or frameworks., implanted somewhat in the characteristics of covering individuals, transmits loads starting with one auxiliary part then onto the next. Part Rings Spike Grid Timber Connector Picture sources: http://clevelandsteel.thomasnet.com/classification/shear-plates-split-rings-spike-frameworks Picture sources: http://members.cox.net/sn3nut/trestles%20part%201.htm

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Steel Bridges The forward railroad extension is the most renowned scaffold in Scotland. Developed in 1890 it was the world first significant steel connect. From short basic bar ranges to vast through trusses. Simplicity of development and upkeep under movement Spans could be fell to various area. Picture Sources: http://upload.wikimedia.org/wikipedia/lodge/8/85/Forthrailbridgefromsouthqueensferry.jpg

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Steel Bridges Girder Spans: limited capacity to focus, or welded areas Practical greatest traverse length for moved steel is 50\' (why?), yet 70\' have been built For ranges more than 50\', utilizing a development segment to accomplish 150\' to 180\'. Two classes: Deck Plane Girders (DPG) and Through Plate Girders (TPG)

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Steel Bridges Deck Plane Girders (DPG): Design for areas where vertical freedom under extension is not basic, over stream, non-safe waterways. Required a more noteworthy aggregate envelope underneath the track structure, in this manner restricting clearances beneath The top rib of the deck plate brace can be used to bolster the deck. No ground surface framework is required . http://www.historicbridges.org/other/annarbor/PICT3639.JPG http://www.historicbridges.org/other/annarbor/AnnArborRR51.jpg

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Steel Bridges Through Plane Girders (TPG): Design for areas in tight freedom circumstances, for example, over roadways Less proficient than Deck Plate Girder of equivalent length: floor framework and knee props Google Map Street View: Stange Rd, Ames, IA http://www.historicbridges.org/other/annarbor/AnnArborRR21.jpg

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Steel Bridges Truss Spans: Solution for ranges more than 150\'- 180\'. Open website composition, top and base harmony individuals associated by vertical/corner to corner holders Two noteworthy auxiliary favorable circumstances: Primary part strengths are pivotal burdens. Furthermore, the open web framework could utilization of a more prominent by and large than equal strong web brace. Economy in material and diminish bargain stack and a more inflexible structure (lessen avoidance) Picture source: http://okbridges.wkinsler.com/manufacturers/oklahoma.html

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Diagrams of different sorts of truss extensions Pictures source: http://okbridges.wkinsler.com/innovation/index.html

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Truss Schematic chart of a through Pratt truss, showing the different individuals and their names. Individuals in pressure are in overwhelming lines, strain in light Pictures source: http://okbridges.wkinsler.com/innovation/index.html

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Steel Bridges Steel Trestles: Similar in development to a timber trestle aside from built of steel. Viaducts: Any arrangement of ranges, regardless of whether curves or steel braces, bolster on high towers. http://data2.collectionscanada.gc.ca/ap/an/a029691.jpg http://okbridges.wkinsler.com/developers/oklahoma.html

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Concrete Bridges Arches: work of stone workmanship or cement Rigid-Frame Bridge: oftentimes use regarding grade-partition ventures. Section Bridges: straightforward ranges laying on projections and wharfs. Fortified solid, I-bar, T-rail structures. Solid Trestles: constantly precast or cast set up with high early quality cement. Solid Girders: 25\'- 60\' traverse. Regular bar areas are sections, tees and voided single and twofold cell boxes.

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Concrete Bridges http://switzerlandinview.wordpress.com/2007/10/29/landwasser-viaduct/http://www.morscher.com/rr/1977/19770618_22.jpg http://farm1.static.flickr.com/225/493880918_adc1e46808.jpg

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Moveable Spans In areas where a settled extension can\'t gave adequate leeway (level and vertical) over a particular hindrance, for example, a safe conduit. Likewise could be found in spots that turntables and exchange tables are use to reposition autos and trains. Regular structures: Bascule, Lift and Swing Design contemplations past auxiliary plan: Integrated lift hardware, settled traverse for activity, straightforward outline, simple introduced and looked after, Clearance, particular stacking conditions (basic and wind stacking). The span and recurrence of extension opening and shutting must be considered.

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Moveable Spans Bascule Bridges: single leaf ranges of either plate support or truss development open toward one side to give the traversable opening. Why not twofold leaf bascule spans? Three fundamental sorts: Trunnion , Rolling Lift and Heel Trunnion

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Moveable Spans Trunnion Rolling Lift Heel Trunnion http://en.wikipedia.org/wiki/File:MovableBridge_draw.gif http://en.wikipedia.org/wiki/File:MovableBridge_roll.gif http://etc.usf.edu/clipart/6200/6259/bridge_8.htm http://en.wikipedia.org/wiki/File:Pegasus_bridge_new.jpg http://en.wikipedia.org/wiki/File:Mystic_River_Bridge.jpg http://en.wikipedia.org/wiki/File:Lake_Erie_Drawbridge.JPG

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Moveable Spans Swing Span Bridges Vertical Lift Bridges http://en.wikipedia.org/wiki/File:MovableBridge_swing.gif http://en.wikipedia.org/wiki/File:MovableBridge_lift.gif http://en.wikipedia.org/wiki/File:Govt_bridge_anim1.gif http://en.wikipedia.org/wiki/File:SteelBridgeOpen1.jpg

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Other Structures Drainage Structures Retaining Walls Tunnels Sheds

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Drainage Structures Culvert structures for railroads don\'t contrast in sort or capacity from expressway seepage structure. Be that as it may, because of the higher live loads, they have a tendency to be altogether sturdier. Other data please allude the waste address.

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Retaining Walls Retaining Walls: Gravity Retaining Walls: Reinforced concrete or mass solid structure intended to oppose the horizontal weight applied by material in its back. Counteracting sliding along a level plane. Lodging Walls: made of timber, precast cement or steel, planned under "gravity divider" hypothesis. Sheet Piling :sheet heap dividers are normally utilized as a part of delicate soils and tight spaces. Sheet heap dividers are made of wood, metal or solid which are crashed into the ground. Mechanically Stabilized Earth (MSE): the earth itself is fortified to end up distinctly an indispensable piece of the structure by utilizing strengthened straps, welded wire work or geotechnical texture.

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Retaining Walls Sheet Piling Gravity Retaining Wall Crib Wall http://www.concretenetwork.com/concrete/poured_concrete_retaining_walls/semi_gravity.htm http://www.p3planningengineer.com/photo%20gallery/machines/piling%20and%20diaphragm%20wall/piling%20and%20diaphragm%20wall.htm http://slopes.jkr.gov.my/Photos/Treatment/pages/Crib%20Wall%201.htm

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Retaining Walls MSE http://www.freepatentsonline.com/7125202-0-large.jpg http://www.gemtec.ca/display/photo04.jpg

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Tunnels The building related with passage plan and development is not particular to railroad designing. Be that as it may, the accompanying angles need to focus for railroad building: Overhead Clearance: Over stature hardware, superelevation and future level raises Side Clearance: For bended passage segments to suit most extreme railcar swingout. Ventilation and Pressure Equalization: When the interior pneumatic stress expanded, the resistance expanded. Legitimate ventilation required to discharge this weight develop. Waste: To p

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