CN110565502B - Folding bridge and application method thereof - Google Patents

Abstract

The present invention discloses a folding bridge and a method for using the same, comprising at least two bridge units, each of which comprises a support platform, a plurality of supporting piers are arranged on the support platform, and each supporting pier can slide along the support platform; a main beam is arranged on the upper end surface of each supporting pier, two bridge panels are hinged on each main beam, and the bridge panels between two adjacent supporting piers are hinged, and the bridge panels on the outer sides of the two supporting piers at both ends of the support platform are connected to the main tower through a sling, and the main tower is fixed on the support platform; when two adjacent supporting piers are close to each other, the two adjacent bridge panels are folded; when two adjacent supporting piers are far away from each other, the two adjacent bridge panels are unfolded; when the bridge panels of two adjacent bridge units are unfolded, the bridge panels between the two adjacent bridge units are butted. The present invention can improve the traffic capacity of campus landscape space, avoid traffic congestion, and realize the separation of pedestrians and motor vehicles on the roads around the landscape to prevent traffic accidents.

Description

A folding bridge and a method of using the same

Technical Field

The invention belongs to the technical field of traffic bridges, and in particular relates to a folding bridge and a use method thereof.

Background technique

Campus landscape space is not only an important place for teachers and students to relax, socialize and study, but also a carrier of school culture. With the change of educational concepts and the diversification of teachers' and students' needs, the quality of campus landscape space design has become increasingly important. Judging from the current development trend of campus planning, campus landscape planning has also paid more and more attention to the humanistic needs of teachers and students in the school. In addition, since artificial lakes have many advantages such as beautifying the environment and regulating microclimate, campus landscape space often plans a certain area of lake space.

Campus landscape space is a resident space, and its road design usually puts accessibility in a secondary position. The internal roads are mostly narrow and tortuous, which increases the walking time while also reducing the traffic capacity. The activities of teachers and students on campus are collective and regular. The traffic volume during peak hours is relatively large. At this time, the campus landscape space often affects such large-scale collective travel of teachers and students, causing traffic congestion and high traffic pressure. The roads around the landscape are often driveways, where people and vehicles often mix, posing certain safety hazards.

Summary of the invention

In response to the technical problems in the prior art, the present invention provides a folding bridge and a method for using the same, which can improve the traffic capacity of campus landscape space and avoid traffic congestion and relieve traffic pressure when the pedestrian traffic volume is relatively large during peak hours; it can also separate the passage of pedestrians and motor vehicles on roads around the landscape and prevent traffic accidents.

In order to solve the above technical problems, the present invention solves them through the following technical solutions:

A folding bridge comprises at least two bridge units, each of which comprises a supporting platform, a plurality of supporting piers are arranged on the supporting platform, and each of the supporting piers can slide along the supporting platform; a main beam is arranged on the upper end surface of each supporting pier, two bridge decks are hinged on each main beam, and the bridge decks between two adjacent supporting piers are hinged, and the outer bridge decks on the two supporting piers at both ends of the supporting platform are connected to the main tower through a sling, and the main tower is fixed on the supporting platform;

When two adjacent supporting piers are close to each other, the two adjacent bridge decks are folded; when two adjacent supporting piers are far away from each other, the two adjacent bridge decks are unfolded;

When the bridge decks of two adjacent bridge units are unfolded, the bridge decks between the two adjacent bridge units are butted.

Furthermore, a slide groove is provided on the support platform, the lower end of each of the supporting piers extends into the slide groove, and the lower end surface of each of the supporting piers is provided with a pulley matching the slide groove.

Furthermore, the cross section of the support platform is fan-shaped, and the slide groove is opened along the direction of the fan-shaped arc.

Furthermore, the main tower is arranged on a line connecting the midpoint of the sector arc and the center of the sector circle.

Furthermore, the bridge deck between two adjacent supporting piers is hinged via a hinge axis.

Furthermore, a driving device for driving the supporting piers to slide is provided between two adjacent supporting piers.

Furthermore, the driving device is a hydraulic press, which is fixed on the support platform; the telescopic rod end of the hydraulic press is hinged to one end of two connecting rods, the other end of one connecting rod is hinged to one supporting pier, and the other end of the other connecting rod is hinged to another supporting pier;

When the telescopic rod of the hydraulic press is extended, the connecting rod drives the two adjacent supporting piers to move away from each other, and the two adjacent bridge decks are unfolded; when the telescopic rod of the hydraulic press is retracted, the connecting rod drives the two adjacent supporting piers to move closer together, and the two adjacent bridge decks are folded.

Furthermore, a ladder is provided on the support platform, the bottom of the ladder is fixedly connected to the support platform, and the top extends toward the bridge deck.

Furthermore, the main beam is an I-beam, the upper end surface of the supporting pier is fixedly connected to the lower end surface of the I-beam, and one side of the bridge deck is hinged to the upper end surface of the I-beam.

A method for using a foldable bridge: when it is needed, a driving device is controlled to drive adjacent supporting piers to move away from each other, and the supporting piers drive the bridge deck to unfold; after use, the driving device is controlled to drive adjacent supporting piers to move closer to each other, and the supporting piers drive the bridge deck to fold.

Compared with the prior art, the present invention has at least the following beneficial effects: a folding bridge of the present invention installs at least two bridge units in a resident space such as a campus landscape space, specifically, each bridge unit includes a support platform, a plurality of supporting piers are arranged on the support platform, and each supporting pier can slide along the support platform, a main beam is arranged on the upper end face of each supporting pier, two bridge panels are hinged on each main beam, and the bridge panels between two adjacent supporting piers are hinged, and the outer bridge panels on the two supporting piers at both ends of the support platform are connected to the main tower through a sling, and the main tower is fixed on the support platform, and the sling plays a role in reinforcing the bridge. Such a structural design can realize the folding and unfolding of the bridge: when the passenger traffic volume is relatively large during peak hours, by controlling the two adjacent supporting piers to move away from each other, the bridge deck on the main beam hinged on the supporting piers can be unfolded as the supporting piers move away; when the bridge decks of two adjacent bridge units are unfolded, the bridge decks between the two adjacent bridge units are butt-jointed, allowing pedestrians to pass quickly, avoiding traffic congestion, alleviating traffic pressure, realizing the separation of pedestrians and motor vehicles on the roads around the landscape, and preventing traffic accidents; in other time periods, by controlling the two adjacent supporting piers to move closer to each other, the bridge deck on the main beam hinged on the supporting piers can be folded as the supporting piers move away; the lower space after the bridge deck is folded can be designed as a sheltered resting place, that is, the architectural gray space in the outdoor park, and supporting facilities can be set up according to needs. It can be seen that the folding bridge of the present invention is composed of a plurality of small-span bridge units, which can be spliced according to the span requirements of different locations, greatly increasing the versatility and practicality of the bridge. The present invention can avoid the sense of division of the original landscape of the campus by the newly built bridge and effectively solve the traffic problem. It can be unfolded into a bridge across the water surface during specific time periods such as classes to meet traffic needs. At this time, due to the manifestation of its access function, the residence function of the landscape is weakened; when it is closed during periods with relatively sparse population, it forms an architectural piece, integrates the bridge into the landscape, and uses the space formed after folding to provide corresponding functionality according to the needs of various colleges and universities, effectively improving the residence function of the landscape space.

Furthermore, a slide groove is opened on the support platform, the lower end of each supporting pier extends into the slide groove, and the lower end surface of each supporting pier is provided with a pulley matching the slide groove. The sliding of the supporting pier is achieved through the cooperation of the pulley and the slide groove, which can effectively reduce the frictional resistance between the supporting pier and the support platform when the bridge is unfolded and folded, realize the smooth sliding of the bridge supporting pier, and improve the service life of the bridge.

Furthermore, the cross-section of the support platform is fan-shaped, and the slide groove is opened along the direction of the fan-shaped arc, so that the main beam of the folding bridge can complete the opening and closing process along a smaller radius and reduce the footprint of the folding bridge in crowded areas or parks, thereby minimizing the impact of the opening and closing of the bridge on the surrounding environment.

Furthermore, the main tower is arranged on the line connecting the midpoint of the sector-shaped arc and the center of the sector-shaped circle. During the opening and closing process of the main beam, the inclined cable and the main beam always remain in the same plane, and the stress state thereof does not change significantly with the movement of the beam, thereby ensuring the stability of force transmission and the reliability of the overall structure. In addition, this position can further reduce the footprint of the folding bridge, and can share the foundation with the bridge piers, making the entire bridge more integrated.

Furthermore, the bridge deck between two adjacent supporting piers is hinged by a hinge shaft, which has a simple structure, is convenient to install and is easy to construct.

Furthermore, the driving device is a hydraulic press, which is fixed on the supporting platform. When the telescopic rod of the hydraulic press is extended, the connecting rod drives the two adjacent supporting piers to move away from each other, and the two adjacent bridge decks to unfold; when the telescopic rod of the hydraulic press is retracted, the connecting rod drives the two adjacent supporting piers to move closer together, and the two adjacent bridge decks to fold, so as to facilitate the control of the unfolding and folding of the bridge.

Furthermore, a ladder is arranged on the support platform, the bottom of the ladder is fixedly connected to the support platform, and the top extends toward the bridge deck, so as to facilitate pedestrians to climb onto the bridge deck through the platform.

In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the specific implementation modes of the present invention, the drawings required for use in the description of the specific implementation modes will be briefly introduced below. Obviously, the drawings described below are some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

FIG1 is a front view of the folded bridge deck structure of the present invention;

FIG2 is a front view of the bridge deck structure after unfolding of the present invention;

FIG3 is a front view of the unfolded full bridge structure of the present invention;

FIG4 is a top view of the unfolded full bridge structure of the present invention;

FIG5 is a left side view of the unfolded full bridge structure of the present invention;

FIG. 6 is a front view of the folding full-bridge structure of the present invention.

FIG7 is a top view of the folding full-bridge structure of the present invention;

FIG8 is a left view of the folding full-bridge structure of the present invention;

FIG9 is a front view of the folding power system in the unfolded state;

FIG10 is a top view of the folding power system in the unfolded state;

FIG11 is a front view of the folding power system in a closed state;

FIG. 12 is a top view of the folding power system in a closed state.

In the figure: 1-main beam; 2-supporting pier; 3-bridge deck; 4-hinge shaft; 5-sling; 6-main tower; 7-supporting platform; 8-chute; 9-ladder; 10-driving device; 11-connecting rod.

Detailed ways

In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

As a preferred embodiment of the present invention, a folding bridge of the present invention includes at least two bridge units, as shown in Figures 3 to 8, each bridge unit includes a support platform 7, a plurality of supporting piers 2 are arranged on the support platform 7, and each supporting pier 2 can slide along the support platform 7. Preferably, the cross section of the support platform 7 is fan-shaped with an angle of 90°. The specific structural design of the supporting pier 2 sliding along the support platform 7 is shown in Figures 4 and 7. A slide groove 8 is provided on the support platform 7, and the slide groove 8 is provided along the direction of the fan-shaped arc. The lower end of each supporting pier 2 extends into the slide groove 8, and the lower end surface of each supporting pier 2 is provided with a pulley matching the slide groove 8.

As shown in Figures 3 to 8, the upper end surface of each supporting pier 2 is fixedly connected with a main beam 1, and two bridge decks 3 are hinged on each main beam 1, and the bridge deck 3 between two adjacent supporting piers 2 is hinged. Specifically, the main beam 1 is an I-beam, the upper end surface of the supporting pier 2 is fixedly connected to the lower end surface of the I-beam, and one side of the bridge deck 3 is hinged to the upper end surface of the I-beam; the bridge deck 3 between two adjacent supporting piers 2 is hinged by a hinge shaft 4, and the hinge shaft 4 is similar to a hinged member such as a hinge connecting a door frame and a door leaf. A main tower 6 is fixedly installed on the support platform 7, and the bridge deck 3 on the outer side of the two supporting piers 2 at both ends of the support platform 7 is connected to the main tower 6 by a sling 5. Preferably, as shown in Figures 4 and 7, the main tower 6 is set on the line connecting the midpoint of the fan-shaped arc and the center of the fan-shaped circle. A ladder 9 is also set on the support platform 7, the bottom of the ladder 9 is fixedly connected to the support platform 7, and the top extends to the bridge deck 3. When the bridge deck is unfolded, pedestrians climb onto the bridge deck through the ladder 9.

A driving device 10 for driving the supporting piers 2 to slide is provided between two adjacent supporting piers 2. Specifically, as shown in Figures 9 to 12, the driving device 10 is a hydraulic press, which is fixed on the support platform 7. The telescopic rod end of the hydraulic press is hinged to one end of two connecting rods 11, wherein the other end of one connecting rod 11 is hinged to one supporting pier 2, and the other end of the other connecting rod 11 is hinged to the other supporting pier 2.

As shown in Figures 9 and 10, when the telescopic rod of the hydraulic press is extended, the telescopic rod drives the two adjacent supporting piers 2 to move away from each other through the connecting rod 11, and the two adjacent bridge decks 3 are unfolded to form a bridge deck for pedestrians to pass. As shown in Figures 11 and 12, when the telescopic rod of the hydraulic press is retracted, the telescopic rod drives the two adjacent supporting piers 2 to move closer to each other through the connecting rod 11, and the two adjacent bridge decks 3 are folded.

As shown in Figures 2 and 10, when the bridge of the present invention needs to be used, the telescopic rod of the driving device 10 is controlled to extend, thereby driving the adjacent supporting piers 2 to slide away along the slide groove 8. The movement of the supporting piers 2 can drive the bridge deck 3 to unfold to form a bridge deck. The bridge decks 3 between two adjacent bridge units can be fully connected after unfolding to form a bridge across the water.

As shown in Figures 1 and 12, after use, the telescopic rod of the driving device 10 is controlled to retract, thereby driving the adjacent supporting piers 2 to slide closer along the slide groove 8. The approach of the supporting piers 2 can drive the bridge deck 3 to fold, and the two bridge decks 3 hingedly connected by the hinge shaft 4 between the two adjacent supporting piers 2 can be folded upward.

In a preferred embodiment of the present invention:

The main beam 1 uses a steel main beam as a cantilever beam to support the bridge deck 3, and the two steel main beams on the edge are suspended to the top of the main tower 6 by steel cables. This embodiment includes four bridge units, each of which includes nine bridge decks 3. The bridge decks 3 can be folded upward at the steel main beam and can be folded downward at the hinge shaft 4. The expansion and folding of the bridge uses an electric hydraulic rod as a power device, which is installed on the support platform 7. The model is YTZ1000-/110 electro-hydraulic push rod, which is suitable for reciprocating push-pull linear motion, and can provide 1000kgf thrust and 750kgf pull to meet the structural force requirements.

The bridge deck 3 in this embodiment has different lengths. The longest beam is supported by a cable-stayed beam. The remaining beams are single cantilever beams. The length of a single bridge is 15m. The length of the bridge deck 3 of the four bridge units after being unfolded and combined is 62m. The material of the bridge deck 3 is a steel plate with a thickness of 20mm.

The main tower 6 is 6m high. The cross-section of the main load-bearing component is cylindrical and made of steel tube concrete. The cable tower uses C50 micro-expansive concrete. The core concrete is subjected to circumferential prestress through steel tubes. The external shape is a spiral rising geometric body splicing shape, which is shielded outside the cylinder by thin steel plates and does not participate in the load.

The cable has a diameter of 45 mm and is made of 1860 steel strands. The elastic modulus is 1.95x10 ⁸ kN/m2, the Poisson's ratio is 0.3, the linear expansion coefficient is 1.2x10 ^-5 1/[C], the weight is 78.5 kN/m ³ , and the damping ratio is 0.02. The cable is arranged on the outside of the longest beam and will not affect the clearance of the bridge deck, so it will not have a negative effect on pedestrian traffic.

The main beam 1 is an I-shaped steel beam, and the ribs are thickened at the cross-section change to meet the force requirements of larger bending moments.

The foundation for the bridge installation is bored cast-in-place piles, with a total of 2x2=4 piles, 14m long, 0.8m in diameter, 2.5m from the pile center in the longitudinal direction of the bridge, and 2.5m in the transverse direction of the bridge. The support platform 7 is 2m thick, 4.5m wide in the longitudinal direction of the bridge, and 4.5m wide in the transverse direction of the bridge.

The cable-stayed cantilever composite system bridge of this embodiment is a composite system consisting of high-strength steel cables (stays), main towers and main beams. The longest main beam on the outside is suspended by the oblique stays drawn from the tower column. The stays provide multi-point elastic support, which significantly reduces the bending moment and deflection of the main beam and improves the spanning capacity of the bridge. At the same time, the building height is small and the main beam is light, which can fully meet the clearance requirements under the bridge, and is conducive to the beauty of the bridge shape and reasonable force. The horizontal component of the oblique cable tension provides a pre-throw height for the main beam, which can improve the deformation resistance of the main beam.

The construction method of this embodiment is as follows:

1. Steel pile foundation construction:

Measurement and positioning → Pile driver installation → Pile driver moving to position → Pile hanging → Pile insertion → Hammering and sinking → Pile connection → Hammering to the designed depth → Internal cutting of steel piles → Precision cutting → Capping

2. Bridge main body construction:

Power plant installation → Steel tube concrete tower column construction → Temporary support erection → Steel truss transportation → Cantilever beam hoisting → Bridge deck assembly (including parametric plate and shell assembly) → Temporary support removal.

Of course, the present invention can also be applied to urban construction. Due to its standardized components and integrated structure, as well as the smaller deployment path and floor space brought about by its special structure, it can be well hidden in urban buildings, thereby better solving the problems of height restrictions on road transportation and blocked driver's sight lines caused by the low height of pedestrian overpasses in cities.

Specifically, in urban construction, the first thing that needs to be solved in design is functional organization and traffic planning. Based on the structural characteristics of the foldable bridge, in the era of big data, its functional attributes of at least two types of business and traffic can greatly reduce the complexity of urban functional organization and traffic planning, effectively coordinate the potential contradictions between the two, realize the multifunctional composite application of urban space (such as the application of staggered travel at different time periods, etc.), improve urban efficiency, and facilitate the development of resilient cities.

In the future commercial operation and promotion, for commercial complexes with large scale and many business formats, the business format layout and traffic line planning are more complex and more important. Therefore, the multifunctional and flexible foldable bridge has great development potential around similar functional areas such as urban commercial complexes. Not only that, the particularity of the working principle of the foldable bridge itself can make it a unique landscape in the city. It will definitely play a great role in promoting the commercial functions of the commercial complex (or similar functional areas), and under the functional radiation of the commercial complex, it contains huge commercial value.

Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (8)

1. A folding bridge, characterized in that: the bridge comprises at least two bridge units, wherein each bridge unit comprises a supporting table (7), a plurality of supporting piers (2) are arranged on the supporting table (7), and each supporting pier (2) can slide along the supporting table (7); the upper end face of each supporting pier (2) is provided with a main beam (1), each main beam (1) is hinged with two bridge panels (3), the bridge panels (3) between two adjacent supporting piers (2) are hinged, the bridge panels (3) positioned on the outer sides of the two supporting piers (2) at the two ends of the supporting table (7) are connected to a main tower (6) through slings (5), and the main tower (6) is fixed on the supporting table (7);

when two adjacent support piers (2) are close, the two adjacent bridge decks (3) are folded; when two adjacent supporting piers (2) are far away, the two adjacent bridge decks (3) are unfolded;

when the bridge decks (3) of two adjacent bridge units are unfolded, the bridge decks (3) between the two adjacent bridge units are butted;

a sliding groove (8) is formed in the supporting table (7), the lower end of each supporting pier (2) extends into the sliding groove (8), and pulleys matched with the sliding groove (8) are arranged on the lower end face of each supporting pier (2);

a driving device (10) for driving the support piers (2) to slide is arranged between two adjacent support piers (2).

2. A folding bridge according to claim 1, characterized in that: the cross section of the supporting table (7) is in a sector shape, and the sliding groove (8) is formed in the direction of a sector arc.

3. A folding bridge according to claim 2, characterized in that: the main tower (6) is arranged on a connecting line of the midpoint of the circular arc of the fan shape and the center of the circle of the fan shape.

4. A folding bridge according to claim 1, characterized in that: the bridge deck (3) between two adjacent supporting piers (2) is hinged through a hinge shaft (4).

5. A folding bridge according to claim 1, characterized in that: the driving device (10) is a hydraulic machine, and the hydraulic machine is fixed on the supporting table (7); the telescopic rod end of the hydraulic machine is hinged with one end of two connecting rods (11), the other end of one connecting rod (11) is hinged with one supporting pier (2), and the other end of the other connecting rod (11) is hinged with the other supporting pier (2);

when the telescopic rod of the hydraulic machine stretches out, the adjacent two supporting piers (2) are driven to be far away by the connecting rod (11), and the adjacent two bridge decks (3) are unfolded; when the telescopic rod of the hydraulic machine is retracted, the connecting rod (11) drives the adjacent two supporting piers (2) to approach, and the adjacent two bridge decks (3) are folded.

6. A folding bridge according to claim 1, characterized in that: the support bench (7) is further provided with a bench ladder (9), the bottom of the bench ladder (9) is fixedly connected with the support bench (7), and the top of the bench ladder extends to the bridge deck (3).

7. A folding bridge according to claim 1, characterized in that: the girder (1) is I-steel, the upper end face of the supporting pier (2) is fixedly connected with the lower end face of the I-steel, and one side of the bridge deck (3) is hinged to the upper end face of the I-steel.

8. A method of using a folding bridge according to any one of claims 1 to 7, characterized in that: when the bridge deck is required to be used, the driving device (10) is controlled to drive the adjacent supporting piers (2) to be away from each other, and the supporting piers (2) drive the bridge deck (3) to be unfolded; after the use is finished, the driving device (10) is controlled to drive the adjacent supporting piers (2) to approach each other, and the supporting piers (2) drive the bridge deck (3) to fold.