CN211848845U - Cable-stayed bridge with inhaul cables staggered in bridge direction and obliquely supported circular tower - Google Patents
Cable-stayed bridge with inhaul cables staggered in bridge direction and obliquely supported circular tower Download PDFInfo
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- CN211848845U CN211848845U CN202020446281.4U CN202020446281U CN211848845U CN 211848845 U CN211848845 U CN 211848845U CN 202020446281 U CN202020446281 U CN 202020446281U CN 211848845 U CN211848845 U CN 211848845U
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Abstract
The invention belongs to the technical field of cable-stayed bridges, and particularly relates to a cable-stayed bridge with staggered stay cables and an inclined-support circular tower along the bridge direction and a construction method thereof, wherein the cable-stayed bridge comprises a circular tower along the bridge direction, two sides of the lower part of the circular tower are fixedly connected with inclined struts respectively, the inclined struts are fixedly connected with a main beam, two ends of the main beam are supported on a bridge abutment through a support, the main beam is downwards fixedly connected with two inclined-leg bridge piers, and the inclined-leg bridge piers are fixedly connected with a foundation; inclined stay cables are anchored between the inner side of the upper part of the circular tower and the main beam side span in a staggered mode, the inclined stay cables are anchored between the lower part of the circular tower and the main beam side span, one end of each inclined stay cable anchored in a staggered mode is anchored at the upper part of the circular tower, and the other end of each inclined stay cable is anchored at the bottom of the main beam side span after penetrating through the circular tower. The cable-stayed bridge with the inhaul cables staggered along the bridge direction and the obliquely-supported circular tower improves the landscape effect of the bridge, improves the stress state of the circular tower, can span a narrow main river channel and is more suitable for the terrain.
Description
Technical Field
The invention belongs to the technical field of cable-stayed bridges, and particularly relates to a cable-stayed bridge with an inclined strut circular tower and staggered inhaul cables along the bridge direction.
Background
The forward-bridge circular tower cable-stayed bridge is a novel landscape bridge, and the built bridge is shown as Zhengzhou tide Cheng Lu butterfly lake bridge, Siping City purple qi road overpass and the like, so that the bridge has a mellow and beautiful shape and a prominent visual effect, is favored by designers and has a good development prospect.
When the existing cable-stayed bridge is designed along the bridge to the circular tower, the circular tower is directly placed or placed in a river channel or a water area through a pier, and the water-blocking area of the arrangement scheme is large, so that the cable-stayed bridge is not suitable for rivers with small widths. When directly placing the ring tower in river course or waters, because the ring tower lower extreme is in the bridge floor even below the surface of water, the visual effect goes up the ring integrality and also receives the influence. In addition, the scheme of arranging the stay cables in a fan-shaped manner from the forward bridge to the two sides of the circular tower causes the circular tower to bear larger bending moment, and the tower top area is a tension area, so that the bridge tower has smaller bearing potential and forms a restriction on increasing the span of the bridge.
Disclosure of Invention
The invention provides a cable-stayed bridge with an obliquely-supported circular tower and a staggered stay cable along the bridge direction and a construction method, aiming at solving the defects of the prior art.
The invention is realized by the following technical scheme:
a cable stayed bridge with staggered stay cables and obliquely supported circular towers along the bridge direction comprises a circular tower along the bridge direction, wherein two sides of the lower part of the circular tower are fixedly connected with oblique struts respectively; inclined stay cables are anchored between the inner side of the upper part of the circular tower and the main beam side span in a staggered manner, one ends of the inclined stay cables anchored in the staggered manner are anchored at the upper part of the circular tower, and the other ends of the inclined stay cables are anchored at the bottom of the main beam side span after penetrating through the circular tower; and a stay cable is anchored between the outer side of the lower part of the circular tower and the midspan of the main beam, one end of the stay cable is anchored at the lower part of the circular tower, and the other end of the stay cable is anchored at the bottom of the midspan of the main beam.
Preferably, a beam end cable guide pipe is embedded in the main beam, an anchor groove is formed in the bottom of the main beam, cable penetrating pipes are arranged on two sides of the circular tower, and a steel anchor box and a tower end cable guide pipe are arranged at the upper part of the circular tower; the upper ends of the diagonal cables which are anchored in a staggered mode penetrate through the tower end cable guide pipe and are anchored at the upper portion of the circular tower through the steel anchor box and the tower end anchorage device, the diagonal cables which are anchored in a staggered mode downwards penetrate through the cable penetrating pipe, the lower ends of the diagonal cables penetrate through the beam end cable guide pipe, and the diagonal cables which are anchored in the anchor groove are anchored on the main beam through the beam end anchorage device.
Preferably, the circular tower is a steel box provided with longitudinal stiffening ribs and a diaphragm plate.
Preferably, the support is a basin-shaped rubber support.
Preferably, the beam-end cable guide pipe, the tower-end cable guide pipe and the cable penetrating pipe are seamless steel pipes.
Preferably, the two sides of the lower part of the circular tower are fixedly connected with the inclined struts through perforated plates and anchor bars respectively.
Preferably, the anchor bars are prestressed threaded steel bars.
The invention also discloses a construction method of the cable-stayed bridge with the staggered guy cables along the bridge direction and the obliquely-supported circular tower, which comprises the following steps:
the method comprises the following steps of (I) casting construction of a field bracket, wherein the casting construction of the lower sections of a foundation, an inclined leg pier, a bridge abutment, a main beam and an inclined strut is included;
(II) manufacturing the circular tower in a factory in sections;
hoisting the steel box segment of the circular tower fixedly connected with the oblique strut in place, pouring the upper section of the oblique strut, and finishing the fixedly connection of the circular tower and the oblique strut after construction;
hoisting other steel box sections of the circular tower in place, and welding to form the circular tower;
one end of a diagonal cable which is anchored in a staggered mode is anchored on the inner side of the upper portion of the circular tower and penetrates through the opposite circular tower, and the other end of the diagonal cable is tensioned and anchored at the bottom of a main beam side span beam; one end of a lower stay cable is anchored at the lower part of the circular tower, and the other end of the lower stay cable is tensioned and anchored at the midspan bottom of the main beam;
and (VI) finishing the subsequent construction of the bridge deck system to form a bridge.
Preferably, in the step (II), the steel anchor box is prefabricated in the circular tower, and the perforated plate, the cable penetrating pipe and the tower end cable guide pipe are pre-welded on the prefabricated circular tower.
Preferably, in the step (III), the circular tower steel box sections connected with the oblique struts are hoisted, the steel bars in the oblique struts penetrate through the circular holes of the perforated plates, the anchor bars are pre-anchored in the lower sections of the oblique struts, the upper ends of the anchor bars penetrate through the reserved holes of the circular tower, then concrete at the upper sections of the oblique struts is poured, the design strength is achieved, and the anchor bars are tensioned in the circular tower for anchoring.
The cable-stayed bridge with the obliquely-supported circular towers and the staggered guy cables along the bridge direction improves the landscape effect of the bridge, improves the stress state of the circular towers, can span narrow main river channels, is more suitable for wide terrain, and widens the application range of the cable-stayed bridge with the horizontally-staggered circular towers. The invention adopts the diagonal leg rigid pier beam and the diagonal support circular tower to form a cable-stayed bridge of a tower beam pier consolidation system, and the diagonal leg pier crosses over the main river channel to solve the water blocking problem; the circular tower is completely arranged above the bridge floor through the inclined struts, and the whole circular tower is displayed above the bridge floor, so that the landscape effect is enhanced; this novel structure ring tower cable-stay bridge's crisscross anchor of suspension cable makes each cross-section of ring tower all be in the pressurized state at ring tower top inboard region, has improved ring tower stress state, makes ring tower department pressure-bearing, has improved ring tower and has born the weight of the potentiality, has created the advantage for increasing the bridge span. The novel circular tower cable-stayed bridge can be used for large-span landmark landscape bridges.
Drawings
Fig. 1 is an elevation view of the present invention.
Fig. 2 is a side view of fig. 1.
Fig. 3 is a plan view of fig. 1.
Fig. 4 is a main beam cross section.
Fig. 5 is an enlarged view of a portion a in fig. 4.
FIG. 6 is a structural view of the connection between the circular tower and the oblique strut.
Fig. 7 is a layout view of the circular tower anchor bars and the perforated plate.
Fig. 8 is a schematic view of an apertured plate construction.
Fig. 9 is a standard cross-sectional view of a circular tower.
FIG. 10 is a cross-sectional view of a diaphragm of the annular column.
FIG. 11 is a schematic diagram of a circular tower transverse partition structure.
FIG. 12 is a schematic structural diagram of a circular tower steel anchor box.
FIG. 13 is a schematic view of the anchoring structure at the upper part of the circular tower.
Fig. 14 is a general assembly view.
In the figure: the system comprises a foundation 1, a bridge abutment 2, an inclined leg pier 3, a support 4, a main beam 5, an anchor groove 6, a beam end cable guide pipe 7, an inclined strut 8, an anchor bar 9, a circular tower 10, longitudinal ribs 10-1, transverse partition plates 10-2, perforated plates 11, steel anchor boxes 12, perforated cover plates 12-1, box wall plates 12-2, stiffening plates 12-3, tower end cable guide pipes 13, a cable penetrating pipe 14, a stay cable 15, a tower end anchor 16 and a beam end anchor 17.
Detailed Description
The following embodiments of the present invention are provided, and it should be noted that the present invention is not limited to the following embodiments, and all equivalent changes based on the technical solutions of the present invention are within the protection scope of the present invention.
Example 1:
the invention provides a novel annular tower cable-stayed bridge structural system and a stay cable arrangement form, and the overall structure is as follows: two inclined leg piers 3 are fixedly connected with the foundation 1, the upper ends of the inclined leg piers 3 are fixedly connected with a main beam 5, and the two ends of the main beam 5 are supported on the bridge abutment 2 through a support 4. The main beam 5 is fixedly connected with two inclined struts 8 upwards, and the two inclined struts 8 are respectively fixedly connected with two sides of the lower part of the circular tower 10. The circular tower 10 is a forward-bridge circular tower, stay cables 15 are anchored between the inner side of the upper part of the circular tower 10 and two side spans of the main beam 5 in a staggered manner, the stay cables 15 are also anchored between the lower part of the circular tower 10 and the middle span of the main beam 5 in a staggered manner, one end of each stay cable 15 anchored in a staggered manner is anchored at the inner side of the upper part of the circular tower 10, and then the other end of each stay cable is anchored at the bottom of the side span of the main beam 5 after penetrating through the circular tower 10.
The cable-stayed bridge with the staggered guy cables along the bridge direction and the obliquely-supported circular tower designed by the invention has small water-blocking area and wider applicable terrain, and the circular tower 10 is completely arranged above the bridge floor through the oblique strut 8, so that the landscape effect is better. This novel structure ring tower cable-stay bridge's crisscross anchor of stay cable 15 has improved ring tower 10 stress state at ring tower 10 top of the tower inboard region, makes ring tower 10 department pressure-bearing, has improved ring tower 10 and has born the potential, has created the advantage for increasing the bridge span.
The forward-bridge-direction staggered guy cable obliquely-supported circular tower cable-stayed bridge designed by the invention can be completed by the following steps:
the cast-in-place support comprises a foundation 1, an inclined leg pier 3, a bridge abutment 2, a main beam 5 and an inclined strut 8, wherein the lower section of the inclined leg pier is cast.
The annular tower 10 is manufactured in sections in a factory.
And thirdly, hoisting the steel box segment of the circular tower 10 fixedly connected with the oblique strut 8 in place, pouring the upper section of the oblique strut 8, and finishing the construction to fixedly connect the circular tower 10 with the oblique strut 8.
And fourthly, hoisting other steel box sections of the circular tower 10 in place, and welding to form the circular tower 10.
One end of a diagonal cable 15 which is anchored in a staggered mode is anchored on the inner side of the upper portion of the circular tower 10 and penetrates through the circular tower 10 on the opposite side, and the other end of the diagonal cable is tensioned and anchored at the bottom of a side span beam of the main beam 5; one end of a lower stay cable 15 is anchored at the lower part of the circular tower 10, and the other end is tensioned and anchored at the midspan bottom of the main beam 5.
And (VI) finishing the subsequent construction of the bridge deck system to form a bridge.
Example 2:
referring to fig. 1-3, the cable-stayed bridge of the forward-bridge staggered cable-stayed circular bridge of the embodiment is a cable-stayed bridge of a tower-girder pier consolidation connection system. The pier beam system is a slant leg rigid frame type bridge structure and comprises a foundation 1, a bridge abutment 2, slant leg piers 3, a support 4 and a main beam 5, wherein a beam end cable guide pipe 7 is pre-embedded in the main beam 5, and a beam lower anchor groove 6 is pre-arranged. The bridge tower system comprises a circular tower 10, an inclined strut 8, a perforated plate 11, a steel anchor box 12 and a tower end cable guide pipe 13, wherein the circular tower 10 is a steel box type circular tower 10 provided with a cable penetrating pipe 14, and the inclined strut 8 and the circular tower 10 are connected through the perforated plate 11 and an anchor bar 9. The stay cable system comprises a stay cable 15, a tower end anchorage 16 and a beam end anchorage 17.
Wherein, the support 4 is a finished product basin-type rubber support; the inclined leg pier 3 is a thin plate pier; the anchor bars 9 are finished prestressed twisted steel bars; the beam-end cable guide pipe 7, the tower-end cable guide pipe 13 and the cable penetrating pipe 14 are seamless steel pipes; the perforated plate 11 is a steel plate provided with a plurality of rows of round holes; the stay cable 15 is a galvanized parallel steel wire finished cable; the tower end anchorage 16 and the beam end anchorage 17 are finished anchorage matched with the stay cable 15.
Referring to the attached drawings 4-5, a main beam 5 is a single-box multi-chamber box beam, a beam end cable guide pipe 7 is embedded in a middle web plate of the box beam, a beam lower anchor groove 6 is arranged at the bottom of the middle web plate, and a stay cable 15 is tensioned and anchored in the anchor groove 6 through a beam end anchor 17.
Referring to fig. 6-8, the tower, beam and pier are connected in a fixed manner. The main beam 5 and the inclined leg bridge pier 3 are both of reinforced concrete structures, and the concretion connection is realized through integral pouring. The ring tower 10 is connected with the oblique strut 8 through the concrete of trompil board 11 and anchor bar 9 realization consolidation, and is concrete, welds trompil board 11 on the ring tower 10, and the reinforcing bar in the oblique strut 8 passes the round hole of trompil board 11, and anchor bar 9 anchors in the oblique strut 8 in advance, and anchor bar 9 passes ring tower 10 and reserves the hole, and stretch-draw anchor in the steel case of ring tower 10.
Referring to fig. 9-13, the annular tower 10 is a welded steel box structure with longitudinal ribs 10-1 and diaphragms 10-2. A tower end cable guide pipe 13, a steel anchor box 12 and a tower end anchor 16 are arranged in the steel box of the circular tower 10. The steel anchor box 12 is a box-shaped anchoring device formed by welding steel plates and mainly formed by assembling and welding a perforated cover plate 12-1, a box wall plate 12-2 and a stiffening plate 12-3.
When the structure is adopted, the construction method comprises the following construction steps:
the cast-in-place support comprises a foundation 1, an inclined leg pier 3, a bridge abutment 2, a main beam 5 and an inclined strut 8, wherein the lower section of the inclined leg pier is cast.
The circular tower 10 is manufactured in a factory in sections, the steel anchor boxes 12 are prefabricated in the circular tower 10, the perforated plates 11, the cable penetrating pipes 14 and the tower end cable guide pipes 13 are pre-welded on the prefabricated circular tower 10, and the perforated plates 11 are respectively welded on two sides of the lower portion of the circular tower 10 and correspond to the positions of the inclined struts 8. The prefabrication of the circular tower 10 can be performed simultaneously with the cast-in-place construction of the bracket.
After the lower sections of the inclined leg bridge pier 3, the bridge abutment 2, the main beam 5 and the inclined strut 8 are poured and finished and the design strength is reached, then the ring tower 10 sections are hoisted on site through the support, the ring tower 10 sections connected with the inclined strut 8 are hoisted firstly, the steel bars in the inclined strut 8 penetrate through the circular hole of the perforated plate 11, the anchor bars 9 are pre-anchored in the lower sections of the inclined strut 8, the upper ends of the anchor bars 9 penetrate through the reserved holes of the ring tower 10, then the upper section concrete of the inclined strut 8 is poured and reaches the design strength, the anchor bars 9 are tensioned and anchored in the ring tower 10, and prestress is applied through the tensioned anchor bars 9 to realize the fixed connection of the ring tower 10 and the inclined strut 8.
And (IV) hoisting other sections of the circular tower 10, and welding the sections into the circular tower 10.
And (V) hanging a stay cable 15, wherein the stay cable 15 is divided into two parts, one part is the stay cable 15 which is anchored in a staggered manner between the upper part of the circular tower 10 and the side span of the main beam 5, and the other part is the stay cable 15 between the lower part of the circular tower 10 and the middle span of the main beam 5.
Specifically, the upper ends of stay cables 15 anchored in a staggered mode are arranged in a tower end cable guide pipe 13 in a penetrating mode, the stay cables 15 are anchored on the inner side of the upper portion of the circular tower 10 through a steel anchor box 12 and a tower end anchor 16, the stay cables 15 penetrate through a cable penetrating pipe 14 of the circular tower 10 on the opposite side downwards, the lower ends of the stay cables 15 are arranged in a beam end cable guide pipe 7 of the main beam 5 in a penetrating mode, the stay cables 15 on two side spans are anchored at the bottom of a side span beam of the main beam 5 in an anchor groove 6 through a beam end anchor 17, in this way, the stay cables 15 on the two side spans are staggered in the upper portion range of the circular tower 10, and side span load is transmitted to the.
One end of a stay cable 15 between the lower part of the circular tower 10 and the midspan of the main beam 5 is anchored at the lower part of the circular tower 10, and the other end is anchored at the bottom of the midspan of the main beam 5.
After the stay cable 15 is tensioned and anchored, the general assembly drawing is shown in fig. 14.
And (VI) finishing the subsequent construction of the bridge deck system to form a bridge.
The above-described embodiment is only one of the preferred embodiments of the present invention, and general changes and substitutions by those skilled in the art within the technical scope of the present invention are included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a along bridge to crisscross cable oblique ring tower cable-stay bridge of propping up, includes along bridge to ring tower (10), its characterized in that: the two sides of the lower part of the circular tower (10) are fixedly connected with oblique struts (8) respectively, the oblique struts (8) are fixedly connected with a main beam (5), two ends of the main beam (5) are supported on the bridge abutment (2) through supports (4), the main beam (5) is fixedly connected with two oblique leg bridge piers (3) downwards, and the oblique leg bridge piers (3) are fixedly connected with the foundation (1); stay cables (15) are anchored between the inner side of the upper part of the circular tower (10) and the side span of the main beam (5) in a staggered mode, the stay cables (15) are anchored between the lower part of the circular tower (10) and the middle span of the main beam (5), one end of each stay cable (15) which is anchored in a staggered mode is anchored at the upper part of the circular tower (10), and the other end of each stay cable (15) which penetrates through the circular tower (10) is anchored at the bottom of the side span of the main beam (5).
2. The forward-bridge-direction staggered guy cable inclined-support circular tower cable-stayed bridge according to claim 1, characterized in that: a beam-end cable guide pipe (7) is embedded in the main beam (5), an anchor groove (6) is formed in the bottom of the main beam (5), cable penetrating pipes (14) are arranged on two sides of the circular tower (10), and a steel anchor box (12) and a tower-end cable guide pipe (13) are arranged at the upper part of the circular tower (10); the upper ends of the diagonal cables (15) which are anchored in a staggered mode penetrate through the tower end cable guide pipe (13) and are anchored at the upper portion of the circular tower (10) through the steel anchor box (12) and the tower end anchorage device (16), the diagonal cables (15) which are anchored in a staggered mode penetrate through the cable penetrating pipe (14) downwards, the lower ends of the diagonal cables (15) which are anchored in the anchor groove (6) through the beam end anchorage device (17) at the side span beam bottom of the main beam (5).
3. The forward-bridge-direction staggered guy cable inclined-support circular tower cable-stayed bridge according to claim 1, characterized in that: the circular tower (10) is a steel box provided with longitudinal stiffening ribs and a diaphragm plate (10-2).
4. The forward-bridge-direction staggered guy cable inclined-support circular tower cable-stayed bridge according to claim 1, characterized in that: the support (4) is a basin-shaped rubber support.
5. The forward-bridge-direction staggered guy cable inclined-support circular tower cable-stayed bridge according to claim 2, characterized in that: the beam end cable guide pipe (7), the tower end cable guide pipe (13) and the cable penetrating pipe (14) are seamless steel pipes.
6. The forward-bridge-direction staggered guy cable inclined-support circular tower cable-stayed bridge according to claim 1, characterized in that: and two sides of the lower part of the circular tower (10) are fixedly connected with the inclined struts (8) through the perforated plates (11) and the anchor bars (9) respectively.
7. The forward-bridge staggered guy cable inclined-strut circular tower cable-stayed bridge according to claim 6, characterized in that: the anchor bars (9) are prestressed threaded steel bars.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020446281.4U CN211848845U (en) | 2020-03-31 | 2020-03-31 | Cable-stayed bridge with inhaul cables staggered in bridge direction and obliquely supported circular tower |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020446281.4U CN211848845U (en) | 2020-03-31 | 2020-03-31 | Cable-stayed bridge with inhaul cables staggered in bridge direction and obliquely supported circular tower |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111254806A (en) * | 2020-03-31 | 2020-06-09 | 济南城建集团有限公司 | Cable-stayed bridge with inhaul cables staggered in bridge direction and obliquely supported circular tower and construction method |
| CN115928931A (en) * | 2022-11-30 | 2023-04-07 | 北京建筑大学 | Plug-in type reeving ridge rod connecting node and construction and design method thereof |
-
2020
- 2020-03-31 CN CN202020446281.4U patent/CN211848845U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111254806A (en) * | 2020-03-31 | 2020-06-09 | 济南城建集团有限公司 | Cable-stayed bridge with inhaul cables staggered in bridge direction and obliquely supported circular tower and construction method |
| CN111254806B (en) * | 2020-03-31 | 2024-09-24 | 济南城建集团有限公司 | Cable-stayed bridge with clockwise staggered stay ropes and inclined support ring towers and construction method |
| CN115928931A (en) * | 2022-11-30 | 2023-04-07 | 北京建筑大学 | Plug-in type reeving ridge rod connecting node and construction and design method thereof |
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