A bridge with a total span l of more than 30m and less than 100m, or a single span (standard span) LK of more than 20m and less than 40m is called a medium bridge.
A bridge with a total length (distance between the front and rear edges of two abutments) L 1 greater than or equal to 8m and less than 30m and a calculated span (distance between two points of bridge structure) l greater than or equal to 5m and less than 20m is called a small bridge.
Extended data:
Extra large bridges refer to highway bridges with a total span exceeding 1000 meters or a single span exceeding 150 meters, and railway bridges with a length exceeding 500 meters. ..
The main purpose of bridge construction is to make the traffic scheme on the waterway and the steep sections such as canyons pass smoothly. Bridges in ancient China mainly included beam bridge, pontoon bridge, cable bridge and arch bridge.
Later it evolved into wooden bridge, stone bridge, brick bridge, bamboo bridge, salt bridge, ice bridge, rattan bridge, iron bridge, shizhu bridge, stone pier bridge, flood bridge, cantilever bridge, covered bridge, wind and rain bridge, bamboo bridge, stone bridge, telescopic bridge, cable-stayed bridge, triangular arch bridge, pointed arch bridge, round arch bridge, continuous arch bridge and flat arch bridge.
References:
Baidu Encyclopedia-Bridge (Chinese Vocabulary)
References:
Baidu encyclopedia-bridge
References:
Baidu Encyclopedia-Xiao Qiao (Vocabulary)