Reference Toolsसंदर्भ उपकरण
Railway Track Calculatorsरेलवे ट्रैक कैलकुलेटर
Quick reference tools and data tables for field use.क्षेत्र उपयोग के लिए त्वरित संदर्भ उपकरण और डेटा तालिकाएँ।
Curve Speed Calculator
As per IRPWM Para 401 onward
131.23 kmph
Vmax
°
R = 1750 m
kmph
kmph
mm
-42–108
m
Cant
Eq. Cant (Vm)
133mm
Eq. Cant (Vg)
33mm
Cd
73mmOK
Cex
27mmOK
Transition Length
Desir.Min.
L1: 0.0056×Ca×Vm4437
L2: 0.0056×Cd×Vm5445
L3: 0.72×Ca4422
TL needed5445Verification (TL = 120 m)
Rca (≤50/60)
18.1mm/sOK
RCd (≤50/60)
22.0mm/sOK
Cant Grad (≥720)
1 in 2000OK
TL vs Required
120 / 54mOK
Max Permissible Speed131.23 kmph
V = 0.27 × √((Ca + Cd) × R)
Vmax (131.23) ≥ Sectional speed (130) — No PSR needed
• CTE approval required if desirable transition length is not provided — IRPWM Para 405(3)
• PCE approval if curve cannot be designed for 160 (Grp A) / 130 kmph (Grp B) — Para 405(5)
• Not for turnout/crossover in curve — use separate rules
Crossover Length Calculator
O.L. (SRJ to SRJ) = X + 2A, where X = D × crossing number
A16,989 mm
X = 5,300 × 1263,600 mm
O.L.97,578 mm
(97.58 m)
Turnout Quick Reference
BG on PSC Sleepers with CMS Crossing
| Type | SRJ-TNC | A (mm) | ANC 52kg | ANC 60kg | Use |
|---|---|---|---|---|---|
| 1:8.5 | 26,295 | 12,025 | 132 | 141 | Goods yards, sidings |
| 1:12 | 37,100 | 16,989 | 186 | 198 | Loop lines, main line turnouts |
| 1:16 | 47,764 | 20,970 | 248 | 264 | High speed turnouts |
| 1:20 | 59,330 | 25,850 | 310 | 330 | Highest speed, passenger lines |
Abbreviations
ANCActual Nose of Crossing
ATSActual Toe of Switch
CMSCast Manganese Steel
CWRContinuously Welded Rail
LWRLong Welded Rail
PSCPre-Stressed Concrete
RDSOResearch Designs & Standards Organisation
SEJSwitch Expansion Joint
SRJStock Rail Joint
TNCTheoretical Nose of Crossing
TWSThick Web Switch
USFDUltrasonic Flaw Detection
WCMSWeldable CMS