- 2071 Chaitra · 2 marks
Types of mechanical splices
Short answer
Three mechanical splices: (1) Threaded coupler - bars threaded and screwed into internally threaded sleeve; (2) Swaged sleeve - steel sleeve hydraulically pressed onto bar ends to grip ribs; (3) Grouted sleeve - bars inserted into sleeve filled with high-strength non-shrink grout. Used for bars >36mm or where lapping causes congestion.
Enlist and make sketch of three kinds of mechanical splices.
Mechanical splices join bars end to end with a coupling device, without overlapping the bars. Three common kinds are:
- Threaded (screwed) coupler - the bar ends are threaded (parallel or taper) and screwed into a long internally threaded sleeve.
- Swaged (cold-pressed) sleeve - a steel sleeve is slipped over the two bar ends and squeezed with a hydraulic press so that it grips the ribs of both bars.
- Grouted sleeve (or wedge-lock sleeve) - the bar ends are inserted into a steel sleeve that is filled with high-strength non-shrink grout (or locked by wedges).
1. Threaded coupler
====[ thread | thread ]====
<- internal thread ->
2. Swaged sleeve
======(##########)======
pressed zone
3. Grouted sleeve
=====[ grout filled ]=====
<- sleeve + grout ->
Mechanical splices are used for large bars (above 36 mm) and where lapping would cause congestion.
✓ Answer checked by Claude Opus 5.5 (high effort)
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