CN201151866Y - Arch beam type overbridge - Google Patents

Abstract

An arch-beam overpass comprises a pier and a pedestrian bridge. The utility model is characterized in that the two ends of the pedestrian bridge are arranged on the pier; an arch beam for supporting the pedestrian bridge is arranged between the two piers; the lower end of the arch beam is fixed on the ground; the arch beam supports or suspends the pedestrian bridge through a suspender cable. The arch-beam overpass with the advantages of reasonable structure and design, small construction difficulty, short time, high fastness and intensity and low production cost can meet the needs of pedestrian overpass construction and development with larger span and high safety and fastness, satisfy the optimal performance price ratio of the pedestrian overpass construction, increase the aesthetic outlook and reduce the adverse effects of the pedestrian overpass on road traffic.

Description

arch bridge

technical field

The utility model belongs to the field of bridge building structures, in particular to pedestrian overpasses, in particular to an arch beam type overpass with novel structure, firmness and durability and low manufacturing cost.

Background technique

With the increasing urbanization and road traffic pressure, more and more cities and regions choose to build on roads with relatively low traffic flow, and build overpasses to relieve traffic pressure and avoid conflicts between pedestrians and motor vehicles. Improve traffic safety. In addition, overpasses of various shapes also beautify urban construction and become a local or regional symbol.

At present, the overpasses built and under construction in our country all adopt steel frame or reinforced concrete bridge body, which has a long construction period, high manufacturing and installation costs, and a very limited service life, which has become the Achilles heel of urban overpass construction. Therefore, many places have to use underground passages with high cost and difficult management and maintenance to replace overpasses, and underground passages will bring greater impact and defects to the relocation of cities and road pipe networks. Objectively speaking, the traffic guiding function of pedestrian overpasses is stronger than that of underground passages. The construction period is relatively short and the cost is lower. It can solve the contradiction of pedestrians and vehicles in traffic nodes in the shortest time. , can well solve many problems existing in the current bridge construction.

Fiber reinforced composite (FRP) is a new type of structural material that has been widely used in civil engineering in recent years. It has significant advantages such as high strength, light weight, and corrosion resistance, and has been well applied in structural reinforcement, enclosure and anticorrosion. As the superior performance of FRP material is gradually recognized by the engineering community, many foreign projects have begun to apply it to new bridges, even long-span bridges. Since the 1970s, FRP materials have been tried to be applied in bridge engineering. The United Kingdom, the United States and Israel were the first to apply this new type of material as the main component of building structures and bridge structures. At that time, most of them used GFRP (glass fiber reinforced composite material, namely FRP). In the late 1970s, my country also began to study GFRP. In 1982, Beijing Miyun built a GFRP simply supported honeycomb box girder highway bridge with a span of 20.7 meters and a width of 9.2 meters. Component feasibility. After opening to traffic, honeycomb instability caused bridge deck subsidence and local buckling above the box girder web. It was overhauled in 1987, and the load-bearing system was transformed into a GFRP-concrete composite structure. It has been used so far and is in good condition.

At present, bridges constructed of fiber-reinforced composite materials, cable-stayed bridges, suspension bridges and other beautiful bridge buildings are used for long-span, high-load-bearing engineering bridges. Because of the difficulty of design and construction, they have never been used in the construction of urban pedestrian bridges. Build apps.

Utility model content

The purpose of this utility model is to provide an arch-beam type overpass with reasonable structural design, low construction difficulty, fast time, high firmness and low cost. It can adapt to the construction of pedestrian overpasses with increasingly large span requirements and high safety and firmness. To meet the needs of development and development, meet the best cost-effectiveness of pedestrian bridge construction, improve the aesthetics, and reduce the adverse impact of pedestrian bridges on road traffic.

For realizing above-mentioned purpose of the invention, the technical scheme that the utility model adopts is as follows:

An arch-beam type overpass bridge, comprising a bridge pier and a pedestrian crossing bridge, is characterized in that the two ends of the pedestrian crossing bridge are erected on the bridge pier, an arch beam supporting the pedestrian crossing bridge is arranged between the two bridge piers, and the lower end of the arch beam is connected to the bridge pier. Fixed on the ground, supported by arch beams or suspended by slings to cross the bridge.

Specifically, the pedestrian bridge is composed of single or plural main girders of fiber-reinforced composite materials connected together, and the fiber direction in the main beam of fiber-reinforced composite materials extends along the length direction of the pedestrian bridge. Beams are hollow tubular, solid or honeycomb structures of rectangular cross-section.

The pedestrian bridge is a main girder structure constructed of steel structure or reinforced concrete.

The two ends of the pedestrian bridge are provided with pedestrian climbing aisles or stairs, and the pedestrian climbing aisles or stairs are two arranged along both sides of the pedestrian bridge or one is arranged on one side of the pedestrian bridge.

The arch beam is composed of a main arch beam and an auxiliary arch beam. The two ends of the main arch beam are provided with auxiliary arch beams. Both ends of the main arch beam are fixed on the inner sides of the two piers. In the bridge, the auxiliary arch beam is located under the pedestrian bridge to support the pedestrian bridge, one end of which is fixed to the main arch beam and the other end is fixedly connected to the bridge pier.

The lower ends of the main arch beams are respectively fixed on both sides of the pedestrian crossing bridge, and the distance between the adjacent pier and the lower ends of the arch beams is the width of the sidewalk.

A sling is fixed on the main arch beam, and the other end of the sling is fixed to the main girder of the pedestrian crossing bridge to carry out load-bearing suspension to the middle part of the pedestrian crossing bridge.

Both ends of the pedestrian crossing bridge are provided with pedestrian climbing aisles or stairs, and both sides of the pedestrian crossing bridge and the pedestrian climbing bridge or stairs are provided with handrails, and the handrails are installed and fixed by handrail columns.

A protective plate is also fixedly arranged between the handrail columns, and the protective plate is made of multiple layers of transparent materials, and lighting fixtures are arranged between the transparent materials.

The step beams of the pedestrian climbing bridge aisle or stairs are provided with anti-skid plates, and the step beams are of translucent structure.

The arch-beam type overpass can be applied to various material shapes to meet the high-span requirements of current road construction, and fiber-reinforced composite materials can be used as the main beam of the pedestrian overpass, effectively reducing the load-bearing design requirements of cables and cable-stayed bridge towers At the same time, the pedestrian bridge with elastic support of cables works like a continuous beam with long-span and small-span elastic support. The internal stress is very small, the building strength is low, the self-weight is light, and the construction is convenient. Beam support, while the piers can also be used to support the pedestrian climbing aisles or stairs at both ends of the pedestrian bridge. In order to increase the solid performance of the arch-type overpass bridge, the load-bearing of the central part of the pedestrian bridge can also be transferred to the main arch beam in the form of slings, which can reduce the impact on the main beam and main arch of the pedestrian bridge while improving the aesthetics of the entire bridge body. Beam engineering requirements, reducing production costs.

The main arch beam can use metal pipe fittings to reduce the difficulty of construction. All parts of the bridge can be produced in a factory, which not only saves the production cost and construction strength, but also ensures the accuracy of the overall assembly. For pedestrian bridges spanning urban vehicular and pedestrian roads. The lower end of the main arch beam can be arranged between the sidewalk spanned by the pedestrian crossing bridge and the main road, the structure and shape are beautiful, and the function setting of the spanning road is not affected.

The main girder of the fiber-reinforced composite pedestrian bridge changes the structural form of the main body of the bridge deck after the laying of transverse fiber-reinforced composite bridge members commonly used at home and abroad. Instead, a single longitudinal fiber-reinforced composite main girder member or combination is used. It can realize single main girder, large span and larger span, which effectively reduces the safety hazards existing in the connection of transverse fiber reinforced composite bridge components, eliminates the influence of local resonance, and improves the strength and strength of the main girder of the pedestrian bridge. safety performance. Fiber-reinforced composite materials have the advantages of light weight, high strength, strong corrosion resistance, and high tensile strength. For example, the specific strength of FRP, a conventional fiberglass fiber composite material, is 20 to 50 times that of steel. The use of fiber-reinforced composite materials will greatly Reduce the weight of the structure. The use in pedestrian bridge engineering can greatly increase the limit span of the bridge, and can reduce the impact of earthquake action.

Handrails, handrails and step beams on both sides of pedestrian crossing bridges, pedestrian climbing bridge aisles or stairs can be fixed by bonding or bolts after mating and plugging, so as to realize convenient and quick disassembly and replacement. Lighting facilities, but also eliminates the problem of circuit laying.

The beneficial effect of the utility model is that the arch-beam type overpass has reasonable structural design, low construction difficulty, fast time, high firmness and low cost, and it can adapt to the construction and construction of pedestrian overpasses with increasingly larger span requirements and high safety and firmness. To meet the needs of development, meet the best cost performance of pedestrian bridge construction, and improve the aesthetics, reduce the adverse impact of pedestrian bridges on road traffic.

Description of drawings

Fig. 1 is the composition structure schematic diagram of the specific embodiment of the present utility model;

Fig. 2 is a schematic diagram of the structure along the direction A of Fig. 1 .

Detailed ways

As shown in Fig. 1 and Fig. 2, this arch-beam type overpass mainly consists of piers, pedestrian climbing stairs, pedestrian crossing bridge, main arch beam and two auxiliary arch beams located on both sides of the main arch beam, and the pedestrian crossing bridge 10 The two ends are erected on the bridge piers 6, and an arch beam supporting the pedestrian crossing bridge is arranged between the two bridge piers. The pedestrian bridge 10 is composed of a main girder of a single fiber-reinforced composite material, the fiber direction in the main girder of the fiber-reinforced composite material extends along the length direction of the pedestrian bridge, and the main girder is a honeycomb structure with a rectangular cross-section. The two ends of the pedestrian crossing bridge are provided with pedestrian bridge climbing stairs 1 and 1 ', and the pedestrian bridge climbing stairs are two arranged along both sides of the pedestrian crossing bridge. The arch beam is composed of the main arch beam 5 and the auxiliary arch beams 7 and 7'. The two ends of the main arch beam are provided with auxiliary arch beams. Both ends of the main arch beam are fixed on the inner sides of the two piers. The top of the main arch beam is In the pedestrian crossing bridge, the auxiliary arch beam is located under the pedestrian crossing bridge to support the pedestrian crossing bridge, one end of which is fixed to the main arch beam, and the other end is fixedly connected to the pier. The lower ends 8 and 8' of the main arch beam are respectively fixed on both sides of the pedestrian bridge, and the distance between the adjacent pier and the lower end of the arch beam is the width of the sidewalk. Sling 9 is fixed on the main arch beam, and the other end of sling is fixed with the main girder of pedestrian crossing bridge, and the middle part of pedestrian crossing bridge is carried out load-bearing suspension. There are handrails 3 on both sides of the stairs for pedestrian crossing and pedestrian bridge climbing. The handrails are installed and fixed through the handrail columns 4. There are also fixed protective plates 2 between the handrail columns. The protective plates are multiple layers of transparent materials, and lighting is arranged between the transparent materials. lamps. The step beams of the pedestrian bridge climbing stairs are provided with anti-skid plates, and the step beams are translucent structures.

Claims (10)

1. a kind of arch beam type overpass bridge, comprise pier and pedestrian crossing bridge, it is characterized in that the two ends of described pedestrian crossing bridge are erected on the pier, the arch beam supporting pedestrian crossing bridge is arranged between two pier, the arch beam of described arch girder The lower end is fixed to the ground, supported by arch beams or suspended by slings for pedestrians to cross the bridge. 2. The arch-beam type overpass according to claim 1, characterized in that the pedestrian bridge is composed of single or plural fiber-reinforced composite main beams connected together, and the fibers in the fiber-reinforced composite main beams The direction extends along the length direction of the pedestrian bridge, and the main girder is a hollow tubular, solid or honeycomb structure with a rectangular cross section. 3. The arch beam type overpass according to claim 1, characterized in that the pedestrian bridge is a main beam structure constructed of steel or reinforced concrete. 4. The arch-beam type overpass according to claim 1, characterized in that two ends of the pedestrian bridge are provided with pedestrian climbing aisles or stairs, and the pedestrian climbing aisles or stairs are along both sides of the pedestrian bridge. Two set up or one set up on the side of the pedestrian bridge. 5. The arched beam type overpass according to claim 1, wherein the arched beam is composed of a main arched beam and an auxiliary arched beam, the two ends of the main arched beam are provided with an auxiliary arched beam, and the two ends of the main arched beam are all fixed Set on the inner side of the two bridge piers, the top of the main arch beam is higher than the pedestrian bridge, and the auxiliary arch beam is located below the pedestrian bridge to support the pedestrian bridge, one end of which is fixed to the main arch beam and the other end is fixedly connected to the bridge pier. 6. The arch beam type overpass according to claim 5, characterized in that the lower ends of the main arch beams are respectively fixed on both sides of the pedestrian bridge, and the distance between the adjacent pier and the lower end of the arch beam is the width of the sidewalk. 7. The arch beam type overpass bridge according to claim 5, characterized in that a sling is fixed on the main arch beam, and the other end of the sling is fixed to the main girder of the pedestrian crossing bridge, and the middle part of the pedestrian crossing bridge Carry out load-bearing suspension. 8. The arch-beam type overpass according to claim 1, characterized in that the two ends of the pedestrian bridge are provided with pedestrian climbing aisles or stairs, and both sides of the pedestrian bridge and pedestrian climbing bridge or stairs are provided with The handrail is installed and fixed through the handrail post. 9. The arch-beam type overpass according to claim 8, characterized in that protective plates are fixedly arranged between the handrail columns, the protective plates are made of multiple layers of transparent materials, and lighting fixtures are arranged between the transparent materials. 10. The arch-beam type overpass according to claim 8, characterized in that the step beams of the pedestrian climbing aisles or stairs are provided with anti-skid plates, and the step beams are of translucent structure.

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