登机桥 (None: Jet Bridge)

什么是登机桥？

A jet bridge — formally called a passenger boarding bridge (PBB) or aerobridge — is the enclosed, weather-protected, telescoping walkway that extends from an airport terminal gate directly to the door of a parked aircraft. Jet bridges replaced the open-air staircases that passengers once used to board aircraft, offering shelter from rain, wind, and extreme temperatures and dramatically improving the boarding experience. They are a universal feature of modern contact stands at major airports worldwide.

工作原理

Each jet bridge is mounted on a motorised wheeled cab that can rotate, extend, and adjust its height to align precisely with the aircraft fuselage door, regardless of aircraft type. An operator drives the bridge out to meet the aircraft after it parks at the stand on the apron. The bridge's floor angle adjusts via hydraulic jacks so the gradient between bridge and cabin sill is within safe limits. At the aircraft interface, a canopy hood seals around the fuselage to prevent wind and rain ingress. After boarding and deplaning are complete, ground handling teams retract the bridge so the aircraft can be pushed back.

类型和标准

• Single-aisle bridges: One bridge for narrow-body aircraft (737, A320), connecting to the forward left door (Door L1).
• Dual bridges: Two parallel bridges for wide-body aircraft, connecting to L1 and L2 simultaneously for faster boarding.
• A380 bridges: Upper-deck bridges that can reach Door L2 on the main deck and Door L1 on the upper deck simultaneously — Heathrow and Singapore Changi have purpose-built upper-deck bridges for A380 operations.
• Nose-loader bridges: Used at some airports for aircraft with nose-loading cargo capability.

Bridge reach varies from approximately 7 m to 45 m, and height adjustment typically covers 2.5 m to 7 m above ground.

趣味事实

• The first jet bridge was installed at O'Hare International Airport in Chicago in 1959, designed by United Airlines engineer Clifford Wetzel.
• Singapore Changi Airport operates over 100 jet bridges across its five terminals — all climate-controlled given the tropical heat and humidity.
• Airports charge airlines a "bridge fee" per use; airlines operating remote stands with bus boarding can save significant costs at price-sensitive airports.
• Modern jet bridges are equipped with 400 Hz ground power units and pre-conditioned air connections, allowing aircraft to shut down engines immediately on arrival and reduce fuel burn and emissions during turnaround.