Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains...
Transcript of Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains...
![Page 1: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/1.jpg)
Turnout and Crossings
Dr. Ahmed A. Khalil
4th year Civil4th year CivilWeek 13
![Page 2: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/2.jpg)
Turnouts & Crossings in a Yard
2
![Page 3: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/3.jpg)
Electric Left Turnout
3
![Page 4: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/4.jpg)
Manual Handling Right Turnout
4
![Page 5: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/5.jpg)
Right and Left Turnouts
5
![Page 6: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/6.jpg)
Turnout Parts
6
1- Switch part2- Middle (Lead) part3- Crossing part
![Page 7: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/7.jpg)
-The long, continuous rails that form the outside edges of theswitch are called the stock rails.-The movable parts that route the trains one way or the otherare called the points or point blades. The throw bar or tiebar ties the points together and controls their movement fromside to side.-The crossing in the middle where the rails meet is called thefrog.
7
frog.-The rails between the points and the frog are called theclosure rails.-The small lengths of rail along the stock rails (opposite thefrog) are called checkrails or guard rails. These keep thewheels from "picking the frog" and heading the wrong way,leading to a derailment.
![Page 8: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/8.jpg)
On a typical switch, the straight path is called themain route, and the path that curves away iscalled the diverging route.
In a railroad, the sharpness of this divergent route
8
In a railroad, the sharpness of this divergent routeis identified in one of two ways: either in termsof the radius, or by a number. The larger thefrog angle, the wider is the switch.
![Page 9: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/9.jpg)
- A guard rail (check rail) is a short pieceof rail placed alongside the main (stock)rail opposite the frog.- These exist to ensure that the wheelsfollow the appropriate flangeway throughthe frog and that the train does not derail.- Generally, there are two of these for eachfrog, one by each outer rail.
9
frog, one by each outer rail.
![Page 10: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/10.jpg)
Turnout Operation
10
![Page 11: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/11.jpg)
Facing and Trailing
11
![Page 12: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/12.jpg)
- Points can be moved laterally into one of two positions soas to determine whether a train coming from the narrowend will be led towards the straight path or towards thediverging path.- A train moving from the narrow end towards the pointblades is said to be executing a facing-pointmovement.
12
movement.
Unless the switch is locked, a train coming from either ofthe converging directs will pass through the points ontothe narrow end, regardless of the position of the points, asthe vehicle's wheels will force the points to move. Passagethrough a switch in this direction is known as a trailing-point movement.
![Page 13: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/13.jpg)
Various factors limiting speeds over turnouts are as follows
A-Kink in the turnout route at the toe of switch railB-Entry from straight to curve without transitionC- Lead curve without super-elevationD-Entry from curve to straight without transitionE-Gap at the V of crossing
13
![Page 14: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/14.jpg)
Straight switchesStraight switches
14
Partly curved switchesPartly curved switches
![Page 15: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/15.jpg)
NonNon-- intersecting typeintersecting type
Intersecting typeIntersecting type
15
Intersecting typeIntersecting type
![Page 16: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/16.jpg)
Tangential typeTangential type
16
![Page 17: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/17.jpg)
Type s of crossing (Frog)Type s of crossing (Frog)
Straight crossingStraight crossing Curved crossingCurved crossing
lead curve may take one of the following forms:lead curve may take one of the following forms:1- Simple Circular Curve
17
2- Partly Curved, having a straight length near the crossing3- Transition Curve
![Page 18: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/18.jpg)
18
![Page 19: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/19.jpg)
-- AbbreviationsAbbreviationsto be usedto be used
19
![Page 20: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/20.jpg)
20
![Page 21: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/21.jpg)
Representation of a turnout on centre lineRepresentation of a turnout on centre line
21
On the centre line the turnout is represented by two lines OPN1 Wand PN2 Z. In this OW represents the overall length of turnout fromSJ to the heel of crossing along the gauge line on which the crossinglies. To locate the turnouts on centre line method, it will be necessaryto knowthe different components of centre line representation.
![Page 22: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/22.jpg)
OP=APN1 =PN2 =MN1 W=N2 Z=KPW=PZ=B=M+KWhere A, M & K are known as turnout parameters
‘M’ is the distance from ‘P’ to the stock joint and can befound out as explained below:
22
![Page 23: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/23.jpg)
11-- Turnout with straight switchesTurnout with straight switches
23
![Page 24: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/24.jpg)
24
![Page 25: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/25.jpg)
25
![Page 26: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/26.jpg)
Offsets to Lead Curves forOffsets to Lead Curves forTurnout with StraightTurnout with StraightSwitchesSwitches
- The lead curve isextended from heel at point‘B’ to a point ‘H’ so thatthe tangent to the curveruns parallel to the gaugeline at a distance ‘Y’
26
line at a distance ‘Y’
- The point ‘H’ has been shown to lie inside the track, but in certainlayouts, depending on the switch angle and the radius, the point ‘H’may lie outside the track and therefore the value of ‘Y’ will workout as negative. The distance ‘BQ’ be denoted by ‘L’
![Page 27: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/27.jpg)
27
![Page 28: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/28.jpg)
ExampleExample
28
![Page 29: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/29.jpg)
22-- Turnout with CurvedTurnout with CurvedSwitchesSwitches
The lead curves in theselayouts at toe of switchesare tangential to theswitch angle and meetsthe straight leg of crossing
29
the straight leg of crossingat a distance ‘w’ from theTNC of the crossing.
![Page 30: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/30.jpg)
At toe of switch, thickness of tongue rail is ‘t’. Derivation forlead curve radius will be same as for straight switches. The samecan be derived by substituting ‘t’ (toe thickness) for ‘d’ (the heeldivergence).
30
![Page 31: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/31.jpg)
-- ExampleExample
Calculate the lead andthe radius of a 1 in 12turnout with curvedswitches.
31
![Page 32: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/32.jpg)
ApplicationsApplications
32
![Page 33: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/33.jpg)
Connections to Straight Parallel
Connections to Straight Parallel TracksConnections to Straight Parallel Tracks
Type of Layout connections between the straight parallel trackswill be dependent upon the distance between the two tracks andthe space availability in the yard. Accordingly distance betweenthe two tracks may be treated as Normal or Large distance.
33
Tracks
![Page 34: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/34.jpg)
Diamond CrossingDiamond Crossing
34
![Page 35: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/35.jpg)
- A crossover is a pair of switches that connects twoparallel rail tracks, allowing a train on one track to crossover to the other. Like the switches themselves,crossovers can be described as either facing or trailing.
- When two crossovers are present in opposite directions,one after the other, the four-switch configuration is
CrossoverCrossover
35
one after the other, the four-switch configuration iscalled a double crossover.
![Page 36: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/36.jpg)
Crossover Connection between Straight Parallel TracksCrossover Connection between Straight Parallel Tracks
36
![Page 37: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/37.jpg)
37
First of all the value of ‘D’ will be known from the field surveying.Turnout prarameters ‘A’, ‘B’ will be known once we have decidedthe type of turnout. Then from Eq 5.2 & 5.3, the values of ‘X’ &finally ‘OL’ will be calculated. Now with these values in the hand,location of one of ‘SJ’ can be fixed by keeping it at a distance ‘OL’apart in reference to another ’SJ’.After fixing the location of ‘SJ’, rest of the turnout can be set outby field surveying.
![Page 38: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/38.jpg)
Scissors
If the crossovers overlap in the shape of the letter X, it isdubbed a ‘scissors crossover or diamond crossover’ inreference to the diamond crossing in the centre. This makesfor a very compact track layout at the expense of using alevel junction.
38
![Page 39: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/39.jpg)
The same function can be achieved by two crossoversFacing each other.
39
![Page 40: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/40.jpg)
Single SlipSingle Slip
40
![Page 41: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/41.jpg)
Double SlipDouble Slip
41
![Page 42: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/42.jpg)
Typical Yard DepotTypical Yard DepotLadder TracksLadder Tracks
42
![Page 43: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/43.jpg)
Flying JunctionsFlying JunctionsBridgesBridges
43
![Page 44: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/44.jpg)
Level JunctionsLevel JunctionsDiamond CrossingsDiamond Crossings
44
![Page 45: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/45.jpg)
Bridge Guard Rail
45
![Page 46: Turnout and Crossings - Bu Shoubra/Civil Engineering... · -The movable parts that route the trains one way or the other are called the points or point blades. The throw bar or tie](https://reader033.fdocuments.us/reader033/viewer/2022041621/5e3efe8f8c550c4dff2281db/html5/thumbnails/46.jpg)
46