Gravity anchorage and tunnel anchorages in suspension bridge

Question

Explain the difference between gravity anchorage and tunnel anchorages in suspension bridges?

Answer 1

Gravity anchorages have mainly three parts:
1) Base block
2) Anchorage block
3) Weight block.
The weight block is always on top of anchor block and its load is not used for opposing the pull of cables.
Opposing loads from cables by mobilization of shear friction between the embedded concrete anchorage and the surrounding foundation comes under Tunnel anchorages.