CN112048987B - Single-tower space cable-surface ground anchor cable-stayed bridge under limited space condition under bridge - Google Patents
Single-tower space cable-surface ground anchor cable-stayed bridge under limited space condition under bridge Download PDFInfo
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- CN112048987B CN112048987B CN202010815309.1A CN202010815309A CN112048987B CN 112048987 B CN112048987 B CN 112048987B CN 202010815309 A CN202010815309 A CN 202010815309A CN 112048987 B CN112048987 B CN 112048987B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/04—Cable-stayed bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
- E02D27/14—Pile framings, i.e. piles assembled to form the substructure
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
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Abstract
The application relates to a single-tower space cable-surface ground anchor cable-stayed bridge under the limited space condition under the bridge, which belongs to the technical field of cable-stayed bridges and comprises: the bridge tower comprises a lower tower column and an upper tower column, wherein the lower tower column is obliquely and upwards arranged along the transverse bridge direction, and the upper tower column is connected to the top of the lower tower column and extends upwards; the main beam is positioned on one side of the lower tower column and is positioned below the upper tower column; one end of the stay cable is anchored with the upper tower column, and the other end of the stay cable is anchored with the main beam; the anchor is positioned on the other side of the lower tower column along the transverse bridge direction and is far away from the main beam; and the back cables are provided with a plurality of back cables, one ends of the back cables are anchored with the upper tower column, and the other ends of the back cables are anchored with the anchor. The utility model provides a cable-stay bridge is for avoiding the underground works of having built, and the lower pylon of pylon upwards sets up to being the slope along the cross bridge, and the safety of the underground works of having built can be guaranteed to the pylon. The bridge tower is connected with the main beam through the plurality of stay cables in an anchoring mode, so that the bridge tower can be prevented from being erected above the built underground engineering, and the conflict with the space position of the built underground engineering is avoided.
Description
Technical Field
The application relates to the technical field of cable-stayed bridges, in particular to a single-tower space cable-surface ground anchored cable-stayed bridge under the condition of limited space under the bridge.
Background
With the gradual improvement of urbanization level, the contradiction between urban development and land resource shortage is more prominent, and the development and utilization of urban underground space become the content which is unavailable for human society. In order to improve the efficiency of traffic travel, a large number of underground projects such as urban subways and tunnels are built, and sometimes, the phenomena of overlapping or crossing of bridges, underground highway tunnels and subway tunnels on a plane occur.
When an underground highway tunnel or a subway tunnel is built in advance, in order to ensure the safety of the built underground engineering, the relationship between a newly-built bridge and the built underground engineering needs to be well coordinated, so that the damage to the underground engineering is avoided, and the bridge tower and the abutment foundation need to keep a sufficient safety distance with the existing underground engineering according to the relevant specification requirements. Under the construction condition, the conventional bridge is difficult to solve the contradiction of the conflict between the space positions of the newly-built bridge and the built underground engineering, so that the creation of the novel bridge structure system which meets the space limitation condition under the bridge and can meet the use function and aesthetic requirements of the bridge has certain significance.
The cable-stayed bridge has large spanning capacity, is a bridge structure consisting of a bridge tower, a main beam and a stay cable, and is generally divided into a double-tower cable-stayed bridge and a single-tower cable-stayed bridge. Traditional cable-stayed bridge structure, pylon and the coincidence of pylon basis center and bridge floor center, unable underground works of avoiding have great influence to existing underground works, can't satisfy the engineering construction under the restricted condition in space under the bridge.
Disclosure of Invention
The embodiment of the application provides an anchor cable-stayed bridge in single-pylon space cable surface under the limited condition of space under the bridge to traditional cable-stayed bridge structure can't avoid underground works among the solution correlation technique, and is great to existing underground works influence, can't satisfy the problem of the engineering construction under the limited condition of space under the bridge.
The embodiment of the application provides a single tower space cable-side ground anchor cable-stayed bridge under the limited condition of space under bridge, include:
the bridge tower comprises a lower tower column and an upper tower column, wherein the lower tower column is obliquely and upwards arranged along the transverse bridge direction, and the upper tower column is connected to the top of the lower tower column and extends upwards;
the main beam is positioned on one side of the lower tower column and is positioned below the upper tower column;
the stay cables are provided with a plurality of stay cables, one ends of the stay cables are anchored with the upper tower column, and the other ends of the stay cables are anchored with the main beam;
the anchor is positioned on the other side of the lower tower column along the transverse bridge direction and is far away from the main beam;
and the back cables are provided with a plurality of back cables, one ends of the back cables are anchored with the upper tower column, and the other ends of the back cables are anchored with the anchor.
In some embodiments: the lower tower column comprises two limbs, the bottoms of the two limbs are arranged at intervals along the bridge direction, the two limbs are inclined and upwards joined into a whole along the transverse bridge direction, and the lower tower column and the upper tower column form a broken line inverted Y-shaped structure.
In some embodiments: the bridge tower is a steel structure with the lower tower column and the upper tower column integrally formed.
In some embodiments: the upper tower column is plumbed to the main beam, and the main beam sequentially comprises a traffic lane area, a hollow area and a sidewalk area from inside to outside along the cross bridge;
the lane area is of a single-box multi-chamber steel box girder structure, the sidewalk area is of a cantilever beam structure, the hollowed area is a plurality of steel cross beams connected between the lane area and the sidewalk area, and the steel cross beams are arranged at intervals along the bridge direction.
In some embodiments: and a steel pull rod is further arranged between the upper tower column and the anchorage, one end of the steel pull rod is anchored with the upper tower column, and the other end of the steel pull rod is anchored with the anchorage.
In some embodiments: the stay cable of the highest anchoring point of the upper tower column is correspondingly anchored at a main beam anchoring point closest to the bridge tower;
the stay cable of the lowest anchoring point of the upper tower column is correspondingly anchored at the main beam anchoring point farthest away from the bridge tower;
the other stay cables are sequentially arranged in a crossed manner according to the rule and are arranged in a spatial net shape.
In some embodiments: the bottom of the bridge tower is provided with a pile foundation, and the pile foundation and the anchorage are of a reinforced concrete integrally-formed structure.
In some embodiments: the bottom of the bridge tower is provided with a pile foundation, the pile foundation and the anchorage are both of reinforced concrete structures, and the pile foundation and the anchorage are of split structures.
In some embodiments: the bridge abutment is arranged at each of two ends of the main beam and used for supporting the main beam.
In some embodiments: and stay cable anchoring points and back cable anchoring points are arranged at the same elevation on the upper tower column, the stay cable anchoring points are used for anchoring stay cables, and the back cable anchoring points are used for anchoring back cables.
The beneficial effect that technical scheme that this application provided brought includes:
the embodiment of the application provides a single-pylon space cable-surface ground anchor cable-stayed bridge under the condition of limited space under a bridge, and the cable-stayed bridge is provided with a bridge pylon, wherein the bridge pylon comprises a lower pylon column which is obliquely and upwards arranged along the transverse bridge direction and an upper pylon column which is connected to the top of the lower pylon column and upwards extends; the main beam is positioned on one side of the lower tower column and is positioned below the upper tower column; the stay cable is provided with a plurality of stay cables, one end of each stay cable is anchored with the upper tower column, and the other end of each stay cable is anchored with the main beam; the anchor is positioned on the other side of the lower tower column along the transverse bridge direction and is far away from the main beam; and the back cables are provided with a plurality of back cables, one ends of the back cables are anchored with the upper tower column, and the other ends of the back cables are anchored with the anchor.
Therefore, the cable-stayed bridge of the application is for avoiding the underground engineering that has been built, and the lower pylon of pylon upwards sets up to being the slope along the horizontal bridge, and the safety of the underground engineering that has been built can be guaranteed to the pylon. The bridge tower is connected with the main beam through the plurality of stay cables in an anchoring manner, so that the main beam can avoid the bridge tower from being erected above the built underground engineering, and the conflict with the space position of the built underground engineering is avoided. In order to improve the stress of the structural system of the cable-stayed bridge in the transverse bridge direction, a back rope and an anchorage are arranged to a bridge tower along the transverse bridge, the unbalanced force generated by the transverse bridge of the bridge tower under the load action is transmitted to the anchorage through the back rope, and the unbalanced horizontal force generated by the transverse bridge of the bridge tower under the load action is transmitted to the anchorage through the back rope.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural view of a cable-stayed bridge according to an embodiment of the present application along a transverse bridge direction;
fig. 2 is a schematic structural view of a cable-stayed bridge according to an embodiment of the present application along a forward direction;
fig. 3 is a transverse cross-sectional view of a main beam according to an embodiment of the present application.
Reference numerals:
1. lowering the tower column; 2. mounting the tower column; 3. a main beam; 4. a stay cable; 5. a back cable; 6. a steel tie rod; 7. pile foundations; 8. anchorage; 9. abutment, 10, single-box multi-chamber steel box girder; 11. a cantilever beam; 12. a steel beam; 13. underground works are built.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides an anchor cable-stayed bridge in single-pylon space cable surface under the limited condition of space under the bridge, which can solve the problem that the traditional cable-stayed bridge structure in the related art can not avoid underground engineering, has great influence on the existing underground engineering, and can not satisfy the engineering construction under the limited condition of space under the bridge.
Referring to fig. 1 and 2, an embodiment of the present application provides a single-pylon space cable-stayed bridge anchored on the ground on a cable plane under a condition that an underbridge space is limited, including:
the pylon, this pylon include along horizontal bridge to the slope lower pylon 1 that upwards sets up and connect at the top of pylon 1 down and the last pylon 2 that upwards extends, the pylon is pylon 1 and last pylon 2 integrated into one piece's steel construction down.
The main beam 3 is positioned at one side of the lower tower column 1, namely, above the built underground engineering, and is positioned below the upper tower column 2; in order to reduce the unbalanced force generated by the stay cable 4 to the upper tower column 2 and the main beam 3, the upper tower column 2 is folded to the center of the bridge 3 along the transverse bridge direction, and the upper tower column 2 is in a vertical or slightly inclined state according to the stress requirement, so that the bridge tower 1 is in a balanced state along the bridge direction under the action of constant load and the torque of the main beam 3 under the action of constant load is reduced.
The stay cables 4 are provided with a plurality of stay cables 4, one ends of the stay cables 4 are anchored with the upper tower column 2, and the other ends are anchored with the main beam 3; the bridge tower is connected with the main beam 3 in an anchoring mode through a plurality of stay cables 4, and therefore the main beam 3 can be erected above the built underground engineering and can be avoided from the bridge tower.
The anchor 8 is positioned on the other side of the lower tower column 1 along the transverse bridge direction, and is far away from the main beam 3; the anchorage 8 is used for balancing the unbalanced horizontal force of the bridge tower in the transverse bridge direction under the action of the dead load and the live load through the back cable 5.
The back cable 5 is provided with a plurality of back cables 5, one end of each back cable 5 is anchored with the upper tower column 2, the other end of each back cable 5 is anchored with the anchor 8, the back cables (5) are anchored between the bridge tower and the anchors 8, and the back cables are used for transmitting horizontal and vertical component forces of the bridge tower to be resisted through the anchors.
The utility model provides a cable-stay bridge is for avoiding having built underground works 13, and the lower pylon 1 of pylon upwards sets up to being the slope along the horizontal bridge, and the pylon can guarantee to have built underground works 13's safety. The bridge tower is connected with the main beam 3 in an anchoring mode through the plurality of stay cables 4, so that the main beam 3 can avoid the bridge tower from being erected above the built underground engineering 13, and the contradiction caused by the conflict between the construction of the cable-stayed bridge and the space position of the built underground engineering 13 is avoided.
In order to improve the stress of the structural system of the cable-stayed bridge in the transverse bridge direction, a back rope 5 and an anchor 8 are arranged to a bridge tower along the transverse bridge, the unbalanced force generated by the transverse bridge of the bridge tower under the action of constant load is transmitted to the anchor 8 through the back rope 5, and the unbalanced horizontal force generated by the transverse bridge of the bridge tower under the action of live load is transmitted to the anchor 8 through the back rope 5.
In some alternative embodiments: referring to fig. 2, an embodiment of the present application provides a single-pylon space cable-side ground anchored cable-stayed bridge under the condition of limited space under the bridge, where a lower pylon 1 of the cable-stayed bridge includes two limbs, the bottoms of the two limbs are arranged at intervals along the bridge direction, the two limbs are inclined and upwardly joined into a whole along the transverse bridge direction, and the lower pylon 1 and an upper pylon 2 form a broken-line inverted Y-shaped structure. The bridge tower is of a broken line inverted Y-shaped structure along the bridge direction so as to improve the rigidity of the bridge tower along the bridge direction.
In some alternative embodiments: referring to fig. 1 and 3, an embodiment of the present application provides a single-pylon space cable-stayed bridge anchored on the ground in a cable plane under a limited underbridge space, an upper pylon 2 of the cable-stayed bridge is perpendicular to a main beam 3, and the upper pylon 2 is in a vertical or slightly inclined state according to a stress requirement, so that a pylon under a constant load is in a balanced state along a bridge direction and a torque of the main beam 3 under the constant load is reduced.
The girder 3 is fish belly shape fretwork girder, and the girder 3 includes driving lane district, fretwork district and pavement district from inside to outside in proper order along the cross bridge. The lane area is single-box multi-chamber steel case roof beam 10 structure, and the pavement area is cantilever beam 11 structure, and the fretwork district is a plurality of steel crossbeams 12 of connecting between lane area and pavement area, and a plurality of steel crossbeams 12 are along following the bridge to the interval setting, fretwork between two adjacent steel crossbeams 12, and steel crossbeams 12 are used for anchor suspension cable 4.
In some alternative embodiments: referring to fig. 1, in the embodiment of the present application, a single-pylon space cable-side-to-ground cable-stayed bridge is provided under a condition that a space under the bridge is limited, a steel pull rod 6 is further disposed between an upper pylon 2 and an anchor 8 of the cable-stayed bridge, one end of the steel pull rod 6 is anchored with the upper pylon 2, and the other end of the steel pull rod is anchored with the anchor 8.
In order to improve the stress of the bridge tower, a strong steel pull rod 6 is arranged at the back of the bridge tower along the transverse bridge direction, the steel pull rod 6 and the lower tower column 1 form a stable triangular structure, and the bending moment of the lower tower column 1 under constant load is reduced by applying pretension to the steel pull rod 6, so that the unfavorable stress state of the lower tower column 1 is improved.
Meanwhile, in order to balance the unbalanced horizontal force of the bridge tower in the transverse bridge direction under the action of constant load and live load, the back of the bridge tower is provided with a back cable 5 and a steel pull rod 6, one end of the steel pull rod 6 is anchored on the upper tower column 2, and the other end of the steel pull rod is anchored on an anchorage 8. Horizontal and vertical component forces transmitted by the back cable 5 and the steel pull rod 6 are resisted through the anchorage 8.
In some alternative embodiments: referring to fig. 2, the embodiment of the present application provides a single-pylon space cable-surface ground anchored cable-stayed bridge under the condition of limited space under the bridge, and a stay cable 4 at the highest anchoring point of an upper pylon 2 of the cable-stayed bridge is correspondingly anchored at a main girder anchoring point closest to a pylon; the stay cable 4 at the lowest anchoring point of the upper tower column 2 is correspondingly anchored at the main beam anchoring point farthest away from the bridge tower; the other stay cables 4 are sequentially arranged in a cross way according to the rule and are arranged in a spatial net shape.
The stayed cable of the cable-stayed bridge is generally arranged in a fan shape, a harp shape or a radial type. The plurality of stay cables 4 of the present application are arranged in a spatial mesh. One end of the stay cable 4 is anchored on the upper tower column 2, and the other end is anchored on the steel beam 12 on the main beam 3. The stay cables 4 are arranged at the highest position of the anchor point at the end of the bridge tower, corresponding to the main beam anchor point, and are closest to the bridge tower, the stay cables 4 are arranged at the lowest position of the anchor point at the end of the bridge tower, corresponding to the main beam anchor point, and are farthest away from the bridge tower, and the rest stay cables 4 are sequentially arranged in a crossed manner according to the rule to form a net-shaped arrangement. The bridge tower stress is improved, the rhythm sense of the bridge is enhanced, and the appearance is more attractive.
In some alternative embodiments: referring to fig. 1 and 2, an embodiment of the application provides a single-tower space cable-stayed bridge anchored on the ground by cable surface under the condition of limited space under the bridge, a pile foundation 7 is arranged at the bottom of a bridge tower of the cable-stayed bridge, and the pile foundation 7 and an anchor 8 are of a reinforced concrete integrally-formed structure.
The horizontal component force of the back cable 5 and the pull rod 6 is opposite to the horizontal component force of the lower tower column 1 in direction, when the stratum around the pile foundation 7 is a soft soil layer, in order to reduce the horizontal force of the lower tower column 1 foundation under the action of constant load and live load, the pile foundation 7 and the anchor 8 are of a reinforced concrete integrated structure, so that the horizontal component force of the bridge tower foundation is reduced, and the engineering scale is reduced.
In some alternative embodiments: the embodiment of the application provides a single-tower space cable-stayed bridge under the limited space condition under the bridge, the bottom of the bridge tower of the cable-stayed bridge is provided with a pile foundation 7, the pile foundation 7 and an anchorage 8 are both of a reinforced concrete structure, and the pile foundation 7 and the anchorage 8 are of a split structure.
When the stratum around the pile foundation 7 is a hard rock layer, in order to save the construction cost, the pile foundation 7 and the anchorage 8 adopt a split structure, and when the anchorage 8 is buried in the hard rock layer, the anchorage 8 and the hard rock layer can jointly balance the acting force of the bridge tower on constant load and live load, so that the stress balance of the bridge tower is ensured, and the bridge tower is prevented from being subjected to adverse bending moment.
In some alternative embodiments: referring to fig. 1 and 2, in the embodiment of the present application, a single-pylon space cable-stayed bridge is provided under the condition of limited space under the bridge, abutment 9 is respectively provided at two ends of a main beam 3 of the cable-stayed bridge, and the abutment 9 is used for supporting the structure of the main beam 3 and is connected with an embankment. The function of the device is to transmit the load of the upper structure of the bridge to the foundation, and also has the functions of resisting the filling pressure behind the abutment, stabilizing the bridge head roadbed and connecting the bridge head circuit and the bridge upper circuit reliably and stably.
In some alternative embodiments: referring to fig. 1 and 2, in the embodiment of the present application, a single-pylon space cable-side ground anchored cable-stayed bridge under the condition of limited space under the bridge is provided, where an upper pylon 2 of the cable-stayed bridge is provided with a stay cable anchoring point and a back cable anchoring point at the same elevation, the stay cable anchoring point is used for anchoring a stay cable 2, and the back cable anchoring point is used for anchoring a back cable 5.
The stay cable anchoring points and the back cable anchoring points are arranged at the same height on the upper pylon 2, so that the stress balance of the upper pylon 2 can be balanced, and the unfavorable bending moment generated by uneven stress on the upper pylon 2 is reduced. The stay cable anchoring points and the back cable anchoring points are arranged on the upper tower column 2 at the same elevation, so that the tension between the stay cables 5 and the back cables 6 can be mutually offset.
Principle of operation
The embodiment of the application provides a single-pylon space cable-surface ground anchor cable-stayed bridge under the condition of limited space under a bridge, and the cable-stayed bridge is provided with a bridge pylon, wherein the bridge pylon comprises a lower pylon 1 which is obliquely and upwards arranged along the transverse bridge direction and an upper pylon 2 which is connected to the top of the lower pylon 1 and upwards extends; a main beam 3, wherein the main beam 3 is positioned at one side of the lower tower column 1 and is positioned below the upper tower column 2; the stay cables 4 are provided with a plurality of stay cables 4, one ends of the stay cables 4 are anchored with the upper tower column 2, and the other ends are anchored with the main beam 3; the anchor 8 is positioned on the other side of the lower tower column 1 along the transverse bridge direction, and is far away from the main beam 3; and a plurality of back cables 5 are arranged, one ends of the back cables 5 are anchored with the upper tower column 2, and the other ends of the back cables 5 are anchored with the anchor 8.
The utility model provides a cable-stay bridge is for avoiding having built underground works 13, and the lower pylon 1 of pylon upwards sets up to being the slope along the horizontal bridge, and the pylon can guarantee to have built underground works 13's safety. The bridge tower is connected with the main beam 3 in an anchoring mode through the plurality of stay cables 4, so that the main beam 3 can be erected above the built underground engineering 13 and the contradiction of conflict with the space position of the built underground engineering 13 is avoided. In order to improve the stress of the structural system of the cable-stayed bridge in the transverse bridge direction, a back rope 5, a steel pull rod 6 and an anchorage 8 are arranged along the transverse bridge to a bridge tower, the unbalanced force generated by the transverse bridge of the bridge tower under the action of constant load and live load is transmitted to the anchorage 8 through the back rope 5 and the steel pull rod 6, and the unbalanced horizontal force generated by the transverse bridge of the bridge tower under the action of the live load and the constant load is transmitted to the anchorage 8 through the back rope 5 and the steel pull rod 6.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The utility model provides a single-tower space cable-side ground anchor cable-stay bridge under limited condition of space under bridge which characterized in that includes:
the bridge tower comprises a lower tower column (1) which is obliquely and upwards arranged along the transverse bridge direction and an upper tower column (2) which is connected to the top of the lower tower column (1) and extends upwards;
the main beam (3) is positioned on one side of the lower tower column (1) and is positioned below the upper tower column (2);
the stay cable (4) is provided with a plurality of stay cables (4), one ends of the stay cables (4) are anchored with the upper tower column (2), and the other ends of the stay cables (4) are anchored with the main beam (3);
the anchor (8) is positioned on the other side of the lower tower column (1) along the transverse bridge direction and is far away from the main beam (3);
the back cables (5) are provided with a plurality of back cables (5), one ends of the back cables (5) are anchored with the upper tower column (2), and the other ends of the back cables (5) are anchored with the anchor (8);
the lower tower column (1) inclines along one side where the main beam (3) is located;
the upper tower column (2) is folded towards the center of the main beam (3) along the transverse bridge direction, so that the upper tower column (2) is perpendicular to the main beam (3);
the bottom of the bridge tower is provided with a pile foundation (7), and the pile foundation (7) and the anchor (8) are of a reinforced concrete integrally-formed structure; alternatively, the first and second electrodes may be,
the pile foundation (7) and the anchorage (8) are both of reinforced concrete structures, and the pile foundation (7) and the anchorage (8) are of split structures.
2. The single-pylon space cable-surface ground anchored cable-stayed bridge under the condition of limited space under the bridge as claimed in claim 1, wherein:
the lower tower column (1) comprises two limbs, the bottoms of the two limbs are arranged at intervals along the bridge direction, the two limbs are inclined and upwards intersected into a whole along the transverse bridge direction, and the lower tower column (1) and the upper tower column (2) form a broken line inverted Y-shaped structure.
3. The cable-stayed bridge anchored on the cable surface in the single-pylon space under the condition of limited space under the bridge as claimed in claim 1 or 2, wherein:
the bridge tower is a steel structure with the lower tower column (1) and the upper tower column (2) integrally formed.
4. The single-pylon space cable-surface ground anchored cable-stayed bridge under the condition of limited space under the bridge as claimed in claim 1, wherein:
the upper tower column (2) is perpendicular to the main beam (3), and the main beam (3) sequentially comprises a roadway area, a hollow area and a sidewalk area from inside to outside along a cross bridge;
the lane area is of a single-box multi-chamber steel box girder (10) structure, the sidewalk area is of a cantilever girder (11) structure, the hollow area is formed by a plurality of steel cross beams (12) connected between the lane area and the sidewalk area, and the steel cross beams (12) are arranged at intervals along the bridge direction.
5. The single-pylon space cable-surface ground anchored cable-stayed bridge under the condition of limited space under the bridge as claimed in claim 1, wherein:
and a steel pull rod (6) is arranged between the upper tower column (2) and the anchorage (8), one end of the steel pull rod (6) is anchored with the upper tower column (2), and the other end of the steel pull rod is anchored with the anchorage (8).
6. The single-pylon space cable-surface ground anchored cable-stayed bridge under the condition of limited space under the bridge as claimed in claim 1, wherein:
the stay cable (4) at the highest anchoring point of the upper tower column (2) is correspondingly anchored at a main beam anchoring point closest to the bridge tower;
the stay cable (4) at the lowest anchoring point of the upper tower column (2) is correspondingly anchored at the main beam anchoring point farthest away from the bridge tower;
the other stay cables (4) are sequentially arranged in a crossed manner according to the rule and are arranged in a spatial net shape.
7. The single-pylon space cable-surface ground anchored cable-stayed bridge under the condition of limited space under the bridge as claimed in claim 1, wherein:
the two ends of the main beam (3) are respectively provided with a bridge abutment (9), and the bridge abutment (9) is used for supporting the main beam (3).
8. The single-pylon space cable-surface ground anchored cable-stayed bridge under the condition of limited space under the bridge as claimed in claim 1, wherein:
stay cable anchor points and back cable anchor points are arranged at the same elevation on the upper tower column (2), the stay cable anchor points are used for anchoring stay cables (4), and the back cable anchor points are used for anchoring back cables (5).
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