A composite bridge with four independent "Bu"-shaped bifurcated bridges in the long and short right-hand system

Abstract

The invention discloses a combined bridge consisting of four independent left-handed long-short Y-shaped bifurcate bridges. The combined bridge is in a combined structure which is composed of four independent bifurcate arch bridges and enables a plurality of bridges at a crossroad to be uncrowded. Each bifurcate arch bridge has a straight-going arch bridge and a right-turn bridge, the right-turn bridge is positioned at the right side of the straight-going arch bridge, the right-turn bridge is separated from the straight-going arch bridge from the right-turn side thereof so as to form a Y-shaped bifurcate bridge, and four bifurcate arch bridges are formed into four synclastically-bifurcate Y-shaped bridges; and two synclastically-bifurcate Y-shaped bridges are formed into a branch combined bridge, and the one-way sections of two straight-going arch bridges of two branch combined bridges are formed into a three-dimensional cross structure. The combined bridge disclosed by the invention has the advantages that the degree of hazard (caused by local geological accidents) to the whole combined bridge is reduced; and the right-turn bridge can be used as a right-turn / left-turn shared bridge and has a wider bridge floor as a merged lane section, therefore, the situation of traffic congestion is not easily caused, and the vehicles can directly turn right without redundant detouring, so that a small crossroad of a dual 6-lane can be completely interchanged.

Description

technical field [0001] The present invention belongs to the overpass bridge that makes motor vehicle traffic unimpeded at crossroads, particularly four independent bifurcated arch bridges that can make straight-going motor vehicles (hereinafter referred to as: straight-going vehicles) and left-turning motor vehicles (hereinafter referred to as: left-turning vehicle) a smooth combined structure of multiple bridges without cross-occupancy conflicts. Background technique [0002] At present, the traffic at level crossings of international and domestic urban arterial roads is very crowded and often blocked, which is a common problem in major cities all over the world. The reason is that two roads intersect at a level. At the intersection, the two roads overlap to become one road. Motor vehicles on the two roads can only share one road at the node, and half of the road resources are lost. Coupled with the mixed traffic of pedestrians, non-motor vehicles and motor vehicles, conge...

AI Technical Summary

Problems solved by technology

Its disadvantages: drivers must recognize the traffic signs clearly at the crossroads. Once they do not see clearly or after seeing clearly, they can no longer change lanes, which will lead to traffic jams at the crossroads at the crossroads when they change lanes

In a word, the road division specification of going straight --- turn left --- turn right from inside to outside required by the overpass is different from the existing road division specification of turn left --- go straight --- turn right, so that the overpass cannot be On-road application of existing specifications

[0004] Chinese patent 200820230509.5 "Direct Left and Right Turning Interchange Overpass" discloses a kind of overpass. Since the patent claims and instructions describe the technical solution very clearly, it seems that the net frame overpass can be understood with the accompanying drawings. The structure and defects are as follows: 1. Unnecessary height and length are added: at the position of the ground branch road away from the intersection, the straight bridge passes under the left-turn bridge on the opposite side and then continues for a section of the bridge body before connecting with the ground, so that the upper floor The height of the bridge from the ground is very high, which increases the total length of the bridge, which makes the entire bridge body tall, long and large, which wastes the cost of building the bridge and blocks the urban landscape.

2. Partial damage leads to overall damage: After the left-turning bridge passes under the straight bridge and the left-turning bridge of the left ground branch, it is connected to the ground after being leveled with the lower bridge section of the straight bridge on the right ground branch. The height of the upper bridge from the ground is very high, the total length of the bridge is increased, and the entire bridge body is connected into a large-scale integral bridge. Once there is a geological change in the part of the large-scale integral bridge, if its part is damaged, the entire large-scale integral bridge will be damaged. overall bridge damage

3. The entire bridge takes up too much area in the form of a net frame: the overall shape of the overpass is a net frame bridge body with two diagonal lines, and the minimum circular diameter of the open space without buildings at the intersection is required to be 115 meters, while in the old There are almost no two-way six-lane crossroads in the urban area with a diameter of 115 meters, that is, the overpass provided by the attached drawing of the manual can hardly be used for the two-way six-lane crossroads in the old city

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