Types of Movable bridges

By…..

G.SHIVAKRISHNA

What is a bridge? What is movable bridge? Types of movable bridges? Advantages? Disadvantages?

Contents

A bridge is a structure built to span physical obstacles such as a body of water, valley, or road, for the purpose of providing passage over the

obstacle.

What Is a Bridge?

A moveable bridge, or movable bridge is a bridge that moves to allow passage (usually) for boats or barges.

What is Moveable bridge?

A drawbridge or draw-bridge is a type of movable bridge typically associated with the entrance of a castle surrounded by a moat

Draw Bridge

A bascule bridge (commonly referred to as a drawbridge) is a moveable bridge with a counterweight that continuously balances as pan, or "leaf," throughout its

upward swing to provide clearance for boat traffic

Bascule Bridge

 It is a three-segment bascule bridge that folds in the shape of the letter N.

Folding bridge

The bridge consists of eight triangular sections hinged at the walkway level and connected above by two-part links that can be collapsed towards the deck by 

hydraulic cylinders, which are concealed in vertical posts in the bridge parapets.

Curling bridge

A vertical-lift bridge or lift bridge is a type of movable bridge in which a span rises vertically while remaining parallel with the deck.

Vertical lifting bridges

A table bridge is a moveable bridge in which the deck moves along the vertical axis. Hydraulic pillars under the bridge raise the bridge deck to allow barge traffic

to pass beneath it

Table Bridges

A retractable bridge is a type of movable bridge in which the deck can be rolled or slid backwards to open a gap while crossing traffic, usually a ship on a

waterway. This type is sometimes referred to as a thrust bridge.

Retractable bridge

A submersible bridge is a type of movable bridge that lowers the bridge deck below the water level to permit waterborne traffic to use the waterway.

submersible bridge

A tilt bridge is a type of moveable bridge which rotates about fixed endpoints rather than lifting or bending, as with a drawbridge

Tilt bridge 

A swing bridge is a movable bridge that has as its primary structural support a vertical locating pin and support ring, usually at or near to its

center of gravity,

swing bridge

A transporter bridge (also ferry bridge or aerial transfer bridge) is a type of movable bridge that carries a segment of roadway across a river. The gondola

 is slung from a tall span by wires or a metal frame

Transporter bridge 

A jet bridge extends from an airport terminal gate to an airplane, allowing passengers to board and disembark without going outside.[

Jet bridge

AdvantagesAn advantage of making bridges moveable Is

the lower cost, due to the absence of high piers and long approaches

Disadvantages The principal disadvantage is that the traffic

on the bridge must be halted when it is opened for passages.

Reference

Wikipedia & Youtube

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