Variable main span-depth lower auxiliary span short slope road crossing bridge

Abstract

The present invention relates to a main span depth variable lower secondary span short slope road overpass bridge. It is a road overpass bridge constructed by utilizing main crosshole and making it be connected with lower secondary crosshole and short bridge grade section. Said main crosshole is equipped with a device capable of making bridge be heightened and opened. Said road overpass bridge can completely solve the problem of urban traffic block.

Description

field of invention [0001] The invention relates to an improvement of a road crossing bridge. Especially the low auxiliary span and short slope road span bridge with variable main span height. technical background [0002] The development and rapid increase of automobiles make road traffic the bottleneck of urban development, and road intersections are the key to smooth traffic. In the prior art, traffic lights and overpass bridges are used to guide traffic at city road intersections. Red and green traffic lights alternately block traffic in a certain direction to guide traffic. Once the waiting time for vehicles to pass through the intersection exceeds the gap alternate time, congestion will occur. The overpass is to make the vehicles go their own way in the way of three-dimensional intersection to ensure the unimpeded intersection, but the tall and complex overpass has the disadvantages of occupying a large area, high cost, affecting the landscape, etc., so it is rarely u...

AI Technical Summary

Problems solved by technology

The overpass is to make the vehicles go their own way in the way of three-dimensional intersection to ensure the unimpeded intersection. However, the tall and complex overpass has the disadvantages of occupying a large area, high cost, affecting the landscape, etc., so it is rarely used so far.

Objectively analyze the characteristics of traffic flow in real urban areas. Cars and small cars account for about 60-70%, ordinary large passenger and large trucks account for up to 30%, and special ultra-high vehicles rarely drive in urban areas, but the technical standards for overpasses and even bridges we built They all take super-high vehicles to pass as the span height, so you can discover the huge waste hidden in the various overpasses and simple cross-road crossovers! For the passage of rare ultra-high vehicles, it is more than enough to build a crossing road with a span of 4 meters or more, which makes it more than enough for a car to pass through the bridge hole like a child passing through the gate, but the continuous flow of vehicles passing the bridge deck has to climb higher slopes.

In addition to the waste of bridge construction cost due to excessive span height, the increased bridge slope also wastes limited land, destroying and affecting the buildings and landscape around road intersections

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