Ground anchor type spatial cable plane suspension bridge

Abstract

The application relates to a ground anchor type spatial cable plane suspension bridge, which comprises two cable towers, a main beam connected with the two cable towers, two main cables installed on the top of the two cable towers, a sling connecting the main beam and the main cables, the end of the two main cables extending to the outside of the cable tower, and the two main cables being combined and anchored on an anchor after passing through the bridge deck from the transverse center of the main beam after the side span approaches the center of the main beam; the projection of the main cable on the plane is a variable interval curve, and the transverse center interval of the two main cables gradually widens from the side span to the main beam. The ground anchor type spatial cable plane suspension bridge changes the position of the main cable passing through and changes the transverse interval of the main cables into a variable interval, so that the main cable does not need to pass through close to the outer edge of the main beam on the side span and no longer conflicts with the widened main beam or ramp space.

Description

Technical Field

[0001] This application relates to the field of bridge engineering technology, specifically to a ground-anchored spatial cable-stayed suspension bridge. Background Technology

[0002] Suspension bridges are a type of long-span bridge, widely used in long-span bridges due to their strong spanning capacity. Traditional suspension bridges typically employ a parallel double-cable-plane arrangement, where the main cables and suspenders on both sides of the main beam are located within the same vertical plane. The main cables pass under the outer edge of the main beam on the side span and are then anchored in the anchorage.

[0003] In urban bridges, due to the need to alleviate near-shore traffic congestion, ramps are usually required within the main cable area of ​​the side span. The main beams that connect to the ramps need to be widened within a certain range, which often causes a space conflict between the main cable of the side span and the widened main beams or ramps. Summary of the Invention

[0004] This application provides a ground-anchored spatial cable-stayed suspension bridge to solve the technical problem in related technologies where the main cable passes under the main beam close to the outer edge of the side span, causing spatial conflict between the side span main cable and the widened main beam or ramp.

[0005] This application provides a ground-anchored spatial cable-stayed suspension bridge, which includes two towers, a main beam connected to the two towers, two main cables installed at the top of the two towers, and suspenders connecting the main beam and the main cables. The ends of the two main cables extend to the outside of the towers, and after converging towards the center of the main beam in the side span, they pass under the bridge deck from the transverse center of the main beam and are anchored to the anchorage. The projection of the main cables on the plane is a curve, and the transverse center distance between the two main cables gradually widens from the side span to the main beam.

[0006] In some embodiments, the lateral center-to-center distance between the two main cables is at its maximum at mid-span.

[0007] In some embodiments, the slings are arranged laterally and inwardly.

[0008] In some embodiments, a limiting cable clamp is provided at the side span to adjust the alignment of the main cable; the lateral center-to-center distance between the two main cables is minimized at the limiting cable clamp.

[0009] In some embodiments, the suspension bridge is provided with a cable saddle at the anchorage, and the main cable achieves spatial turning through the cable saddle. At the cable saddle and the limiting cable clamp, the lateral center distance between the two main cables is the same.

[0010] In some embodiments, the two main cables share the same cable saddle.

[0011] In some embodiments, the lateral center-to-center distance between the two main cables at the front anchor face of the anchorage is greater than the lateral center-to-center distance at the cable saddle.

[0012] In some embodiments, at the anchor face location, the two main cables are sequentially anchored at the transverse center of the anchor.

[0013] In some embodiments, a main cable saddle is provided at the top of the tower, and the main cable achieves spatial turning through the main cable saddle. The bottom surface of the main cable saddle is an inclined plane or a plane. At the top of the same tower, there is no connection between the two main cable saddles.

[0014] In some embodiments, the main girder is a steel truss girder with a double-layer bridge deck or a steel box girder with a single-layer bridge deck.

[0015] The beneficial effects of the technical solution provided in this application include:

[0016] This application provides a ground-anchored spatial cable-stayed suspension bridge, in which the projection of the main cable on the plane is a variable-spacing curve. From the side span to the main beam, the transverse center-to-center distance between the two main cables gradually widens. After the main cable moves closer to the center of the main beam in the side span, it passes under the bridge deck at the transverse center of the main beam and is anchored to the anchorage. This changes the position of the main cable passing under the bridge deck and changes the transverse spacing between the main cables to a variable spacing. The main cable does not need to pass under the main beam close to the outer edge on the side span side, and it no longer conflicts with the widened main beam or ramp space. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the elevation structure of a ground-anchored spatial cable-stayed suspension bridge according to an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the planar structure of a ground-anchored spatial cable-stayed suspension bridge according to an embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the structure of a cable tower in one embodiment of the present invention.

[0021] Figure 4 This is a schematic diagram of the main cable saddle in one embodiment of the present invention.

[0022] Figure 5 This is a structural schematic diagram of the cross-section of the main beam in one embodiment of the present invention.

[0023] Figure 6 This is a schematic diagram of the structure of one side anchorage in one embodiment of the present invention.

[0024] Figure 7 for Figure 6 The diagram shows the structure of the anchorage along the AA direction.

[0025] Figure 8 This is a schematic diagram of the structure of the other anchorage in one embodiment of the present invention.

[0026] Figure 9 for Figure 8 The diagram shows the structure of the anchorage along the BB direction.

[0027] Figure 10 This is a schematic diagram of the cooperation between the cable saddle and the main cable in one embodiment of the present invention.

[0028] Figure label:

[0029] 1. Tower; 11. Main cable saddle; 2. Main beam; 3. Main cable; 4. Suspension cable; 5. Anchorage; 51. Cable saddle; 6. Cable clamp. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] like Figure 1 and Figure 2 As shown, where, Figure 1 This is a schematic diagram of the elevation structure of a ground-anchored spatial cable-stayed suspension bridge according to an embodiment of the present invention. Figure 2 This is a schematic diagram of the planar structure of a ground-anchored spatial cable-stayed suspension bridge according to an embodiment of the present invention.

[0032] This application provides a ground-anchored spatial cable-stayed suspension bridge, which includes two towers 1, a main beam 2 connected to the two towers 1, two main cables 3 installed on the top of the two towers 1, and suspenders 4 connecting the main beam 2 and the main cables 3. The ends of the two main cables 3 extend to the outside of the towers 1. After the side spans move towards the center of the main beam 2, they pass under the bridge deck from the transverse center of the main beam 2 and are anchored to the anchorage 5.

[0033] The projection of the main cable 3 on the plane is a variable spacing curve. From the side span to the main beam 2, the transverse center spacing of the two main cables 3 gradually widens.

[0034] This application provides a ground-anchored spatial cable-stayed suspension bridge. The projection of the main cable on the plane is a variable-spacing curve. From the side span to the main beam, the transverse center-to-center distance between the two main cables gradually widens. After the main cable moves closer to the center of the main beam in the side span, it passes under the bridge deck at the transverse center of the main beam and is anchored to the anchorage. This changes the position of the main cable passing under the bridge deck and changes the transverse spacing between the main cables to a variable spacing. The main cable does not need to pass under the main beam close to the outer edge on the side span side, and it no longer conflicts with the widened main beam or ramp space.

[0035] like Figure 3 As shown, Figure 3 This is a schematic diagram of the structure of a cable tower in one embodiment of the present invention.

[0036] Tower 1 is a concrete tower with an elliptical shape.

[0037] like Figure 4 As shown, Figure 4 This is a schematic diagram of the main cable saddle in one embodiment of the present invention.

[0038] In some embodiments, a main cable saddle 11 is provided at the top of the tower 1, and the main cable 3 achieves spatial turning through the main cable saddle 11. The bottom surface of the main cable saddle 11 is an inclined surface.

[0039] The bottom surface of the main cable saddle 11 is preferably designed as a slope to avoid the concrete base bearing the lateral shear force of the main cable saddle 11. The slope is perpendicular to the resultant force direction of the lateral horizontal reaction force and the vertical reaction force at the bottom of the main cable saddle 11, and slopes from the outside to the inside.

[0040] Of course, in other embodiments, the bottom surface of the main cable saddle 11 can also be designed as a plane. At the top of the same tower 1, there is no connection between the two main cable saddles 11.

[0041] like Figure 5 As shown, Figure 5 This is a structural schematic diagram of the cross-section of the main beam in one embodiment of the present invention.

[0042] In some embodiments, the main girder 2 is a triangular steel truss girder with a double-layered bridge deck. Roads and rail transit are arranged on both the upper and lower decks. In other embodiments, the main girder 2 can be a steel box girder with a single-layered bridge deck, on which roads and rail transit are arranged.

[0043] In some embodiments, the suspenders 4 are arranged laterally and inwardly. The main cable 3 is connected to the suspenders 4 at mid-span, and the horizontal component of the force exerted by the suspenders 4 on the main cable 3 is outward. Under the action of the suspenders 4, the main cable 3 at mid-span is curved in both the plane and the elevation.

[0044] like Figure 2As shown, in some embodiments, a limiting cable clamp 6 is provided at the side span to adjust the alignment of the main cable 3. Due to the inward restraint of the limiting cable clamp 6, the planar alignment of the main cable 3 can be slightly adjusted.

[0045] like Figures 6 to 9 As shown, where, Figure 6 This is a schematic diagram of the structure of one side anchorage in one embodiment of the present invention. Figure 7 for Figure 6 The diagram shows the structure of the anchorage along the AA direction. Figure 8 This is a schematic diagram of the structure of the other anchorage in one embodiment of the present invention. Figure 9 for Figure 8 The diagram shows the structure of the anchorage along the BB direction.

[0046] In some embodiments, the anchor 5 is a single-saddle-chamber gravity anchor, and the anchor foundation adopts a diaphragm wall and enlarged foundation scheme.

[0047] In some embodiments, at the anchor face location, the two main cables 3 are sequentially anchored at the transverse center of the anchor 5.

[0048] like Figure 10 As shown, Figure 10 This is a schematic diagram of the cooperation between the cable saddle and the main cable in one embodiment of the present invention.

[0049] In some embodiments, the suspension bridge is provided with a cable saddle 51 at the anchorage 5, and the main cable 3 achieves spatial steering through the cable saddle 51.

[0050] In some embodiments, the two main cables 3 share the same cable saddle 51, which can counteract the reaction force of the main cable when bending.

[0051] like Figure 2 As shown, the lateral center-to-center distance between the two main cables 3 is B1 at mid-span, B2 at the main cable saddle 11 at the top of the tower, B3 at the limiting cable clamp 6, B4 at the loose cable saddle 51, and B5 at the front anchor face of the anchorage 5, where B1 > B2 > B3 = B4, and B3 = B4 < B5. That is, the lateral center-to-center distance between the two main cables 3 is the largest at mid-span, and the same and smallest at the loose cable saddle 51 and the limiting cable clamp 6.

[0052] By varying the transverse center spacing of the two main cables 3, a suitable space is provided to facilitate the main cables to converge and anchor under the transverse center of the main beam after moving closer to the center of the main beam in the side span.

[0053] In some embodiments, the lateral center-to-center distance between the two main cables at the front anchor face of the anchor 5 is greater than the lateral center-to-center distance at the cable saddle 51.

[0054] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the method or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0055] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0056] The above are merely specific embodiments of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A ground anchored spatial cable plane suspension bridge, characterized in that, The suspension bridge includes two towers (1), a main beam (2) connected to the two towers (1), two main cables (3) installed on the top of the two towers (1), and a suspender (4) connecting the main beam (2) and the main cable (3). The ends of the two main cables (3) extend to the outside of the towers (1), and after the side spans approach the center of the main beam (2), they pass under the bridge deck from the transverse center of the main beam (2) and are anchored to the anchorage (5). The projection of the main cable (3) on the plane is a variable spacing curve. From the side span to the main beam (2), the transverse center spacing of the two main cables (3) gradually widens. The tower (1) is equipped with a main cable saddle (11) at the top of the tower. The main cable (3) achieves spatial turning through the main cable saddle (11). The side span is equipped with a limiting cable clamp (6) to adjust the alignment of the main cable (3). The suspension bridge is equipped with a cable saddle (51) at the anchorage (5). The two main cables (3) share the same cable saddle (51). The main cable (3) achieves spatial turning through the cable saddle (51). The transverse center distance between the two main cables (3) at the mid-span is B1, the transverse center distance at the main cable saddle (11) is B2, the transverse center distance at the limiting cable clamp (6) is B3, the transverse center distance at the loose cable saddle (51) is B4, and the transverse center distance at the front anchor face of the anchor (5) is B5, where B1 > B2 > B3 = B4, B3 = B4 < B5, so that the transverse center distance between the two main cables (3) is the largest at the mid-span and the smallest at the limiting cable clamp (6).

2. An earth-anchored cable-plane suspension bridge as defined in claim 1, characterized in that The sling (4) is arranged laterally and inwardly.

3. An earth-anchored cable-plane suspension bridge as defined in claim 1, wherein At the anchor position, the two main cables (3) are anchored sequentially at the transverse center of the anchor (5).

4. An earth-anchored cable-plane suspension bridge as defined in claim 1, wherein The bottom surface of the main cable saddle (11) is an inclined plane or a plane. At the top of the same cable tower (1), there is no connection between the two main cable saddles (11).

5. An earth-anchored cable-plane suspension bridge as defined in claim 1, wherein The main beam (2) is a steel truss beam with a double-layer bridge deck or a steel box beam with a single-layer bridge deck.

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