CN213538648U - A laterally unbalanced oblique pull buckle system - Google Patents
A laterally unbalanced oblique pull buckle system Download PDFInfo
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- CN213538648U CN213538648U CN202022029279.XU CN202022029279U CN213538648U CN 213538648 U CN213538648 U CN 213538648U CN 202022029279 U CN202022029279 U CN 202022029279U CN 213538648 U CN213538648 U CN 213538648U
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Abstract
一种横向不平衡的斜拉扣挂体系，包括扣塔、扣索、拱肋节段、锚索、锚索锚碇、侧风缆、侧风缆锚碇，扣塔包括扣塔塔架、底部结构物、分配梁、张拉锚梁、侧风缆锚头，扣塔塔架的上部分层设有沿横桥向设置的分配梁，每层分配梁上设有沿纵桥向设置的张拉锚梁，张拉锚梁的两端设有锚头，扣塔塔架的顶部设有侧风缆锚头；扣索和锚索分别锚固于张拉锚梁的两端，实现纵向水平力的自平衡，抵消了大部分横向水平力，优化了扣塔塔架的受力情况；其中，上下游锚索呈横桥向不平衡状态布置，采用在扣塔的横桥向偏移方向的反向设置侧风缆，通过分阶段施加侧风缆索力平衡剩余的横向水平力，调整了扣塔横向偏移量，保证了整体安全稳定。
A laterally unbalanced cable-stayed buckle system includes a buckle tower, a buckle cable, an arch rib segment, an anchor cable, an anchor cable anchor, a side wind cable, and a side wind cable anchor. Bottom structures, distribution beams, tension anchor beams, cross-wind cable anchor heads, and the upper layer of the buckle tower tower are provided with distribution beams arranged in the transverse bridge direction, and each layer of distribution beams is provided with a distribution beam arranged in the longitudinal bridge direction. The tension anchor beam, the two ends of the tension anchor beam are provided with anchor heads, and the top of the buckle tower tower is provided with side wind cable anchor heads; The self-balance of the force offsets most of the lateral horizontal force and optimizes the stress condition of the tower; among them, the upstream and downstream anchor cables are arranged in an unbalanced state in the transverse bridge direction, and the offset direction of the transverse bridge direction of the buckle tower is adopted. The side wind cable is set in the opposite direction, and the remaining lateral horizontal force is balanced by applying the force of the side wind cable in stages, and the lateral offset of the buckle tower is adjusted to ensure the overall safety and stability.
Description
Technical Field
The utility model belongs to the technical field of the arch bridge construction, concretely relates to system is buckled to one side to horizontal unbalanced pulling.
Background
Along with the continuous construction of the large-span arch bridge in China, the construction technology of the large-span arch bridge is also continuously improved, and particularly in the construction of the large-span arch bridge in a valley of a mountain area, cantilever construction is frequently performed by adopting an inclined pull buckle hanging method in recent years. The technology maintains the stress balance and the structural stability in the construction process by matching the anchor cables and buckling and hanging the arch rib sections. The common cable-stayed buckling and hanging system is generally designed to be a balanced symmetrical structure, and after the anchor cable adjusts the stress balance of the longitudinal bridge system, the transverse bridge balance can be basically ensured, so that the stress of the system in all directions is in a balanced and stable state. However, when the situation of lateral imbalance inevitably occurs due to the limitation of terrain conditions, the cable-stayed buckling and hanging system needs to be further researched and improved.
SUMMERY OF THE UTILITY MODEL
The utility model provides a to above-mentioned problem, a transversely unbalanced draws to one side and detains system of hanging is provided.
The purpose of the utility model can be realized by the following technical scheme: a transversely unbalanced cable-stayed buckling and hanging system comprises a buckling tower, a buckling cable, an arch rib segment, an anchor cable anchorage, a side wind cable and a side wind cable anchorage;
the buckling tower comprises a buckling tower frame, a bottom structure, distribution beams, stretching anchor beams and side wind cable anchor heads, the buckling tower frame is installed on the bottom structure, more than one layer of distribution beams are arranged at the upper part of the buckling tower frame, the distribution beams are arranged along the transverse bridge direction, the number of the distribution beams on each layer is more than two, a plurality of stretching anchor beams are arranged on each layer of distribution beams at equal intervals along the transverse bridge direction, each stretching anchor beam is arranged along the longitudinal bridge direction, the anchor heads are arranged at two ends of each stretching anchor beam, and the side wind cable anchor heads are arranged at the top of the buckling tower frame;
two ends of each buckling cable are respectively connected with an anchor head at one end of one pulling anchor beam and a buckling point on one arch rib section; the anchor cables comprise upstream anchor cables and downstream anchor cables, the anchor cables comprise upstream anchor cable anchors and downstream anchor cable anchors, one end of each upstream anchor cable and one end of each downstream anchor cable are respectively connected with an anchor head at the other end of one anchor pulling beam, the other ends of all the upstream anchor cables are connected with the upstream anchor cable anchors, the upstream anchor cable anchors are fixed on the ground at the upstream of the buckling tower, the other ends of all the downstream anchor cables are connected with the downstream anchor cable anchors, the downstream anchor cable anchors are fixed on the ground at the downstream of the buckling tower, and the upstream anchor cable anchors and the downstream anchor cable anchors are irregularly arranged, so that the upstream anchor cables and the downstream anchor cables are arranged in a cross-bridge unbalanced state;
the side wind cables are reversely arranged on the side faces of the buckled towers in the offset direction along the transverse bridge of the buckled towers and are perpendicular to the axis of the bridge, the two ends of each side wind cable are respectively connected with the side wind cable anchor heads and the side wind cable anchors of the buckled towers, and the side wind cable anchors are fixed on the ground.
Further, the number of the buckling cables and the anchor cables corresponds to the number of the tensioning anchor beams of the buckling tower.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the buckling cables and the anchor cables are respectively anchored at two ends of the tensioning anchor beam to realize self-balance of longitudinal horizontal force, the distribution beam is arranged below the tensioning anchor beam to ensure that most of transverse horizontal force generated by buckling cable force and anchor cable force can be mutually offset, and the distribution beam and the tensioning anchor beam are arranged to optimize a force transmission path, avoid the complex stress condition of the buckling tower frame and simplify the structural design of the buckling tower frame;
2. aiming at the problem that the transverse horizontal force cannot be completely counteracted due to the unbalanced state of the anchor cables, the side wind cables are arranged in the reverse direction of the transverse bridge of the buckling tower in the offset direction, and the cable force of the side wind cables is exerted in stages to balance the residual transverse horizontal force in the system, so that the transverse offset of the buckling tower is adjusted, and the integral safety and stability of the system are ensured.
Drawings
Fig. 1 is a schematic plan view of the present invention.
Fig. 2 is a schematic view of the front vertical surface structure of the present invention.
Fig. 3 is a schematic side elevation structure of the present invention.
Fig. 4 is a schematic view of a front vertical structure of the upper part of the tower frame of the present invention.
Fig. 5 is a schematic side elevation view of the upper part of the tower frame of the present invention.
The parts in the figures are numbered as follows:
1 detain tower
101 detain tower
102 bottom structure
103 distribution beam
104 stretch-draw anchor beam
105 side wind cable anchor head
2 buckling rope
3 Arch rib segment
4 anchor cable
401 upstream anchor line
402 downstream anchor line
5 anchor cable anchorage
501 upstream anchor cable anchorage
502 downstream anchor rope anchorage
6 side wind cable
7 side wind cable anchorage
8 approach bridge body
9 approach bridge pier
10 river shoreline
11 side slope line
12 roads.
Detailed Description
The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings to make it clear to those skilled in the art how to practice the invention. While the invention has been described in connection with its preferred embodiments, these embodiments are intended to be illustrative, and not to limit the scope of the invention.
Referring to fig. 1 to 3, a diagonal pulling buckling-hanging system with transverse unbalance comprises a buckling tower 1, a buckling rope 2, an arch rib segment 3, an anchor rope 4, an anchor rope anchorage 5, a crosswind cable 6 and a crosswind cable anchorage 7.
The buckling tower 1 comprises a buckling tower frame 101, a bottom structure 102, a distribution beam 103, a tension anchor beam 104 and a side wind cable anchor head 105. The tower buckling frame 101 is installed on the bottom structure 102, the tower buckling frame 101 needs to be specially designed, the bottom structure 102 can comprehensively consider the structural characteristics and the topographic conditions of the bridge main body, and the existing structure is utilized.
Referring to fig. 4 and 5, the upper portion of the tower buckling frame 101 is provided with more than one layer of distribution beams 103, the distribution beams 103 are arranged along the transverse bridge direction, the number of each layer of distribution beams 103 is more than two, each layer of distribution beams 103 is provided with a plurality of tension anchor beams 104 which are distributed at equal intervals along the transverse bridge direction, each tension anchor beam 104 is arranged along the longitudinal bridge direction, both ends of each tension anchor beam are provided with anchor heads, and the top of the tower buckling frame 101 is provided with a side wind cable anchor head 105. The transversely unbalanced cable-stayed buckling and hanging system transversely connects a plurality of tensioning anchor beams 104 into a whole through the distribution beam 103, so that the transverse horizontal forces of the upstream part and the downstream part can be mutually offset; the number of each layer of the tensioning anchor beams 104 is determined according to the actual engineering requirements, and anchor heads at two ends of each layer of the tensioning anchor beams 104 are respectively used for connecting a padlock and an anchor cable 4, so that the longitudinal stress balance of the transversely unbalanced cable-stayed buckling and hanging system is realized.
The number of the buckling ropes 2 and the anchor cables 4 corresponds to the number of the tensioned anchor beams 104. Two ends of each buckling cable 2 are respectively connected with an anchor head at one end of one anchor pulling beam 104 and a buckling point on one arch rib section 3, and the plurality of arch rib sections 3 are constructed by section-by-section suspension assembly by adopting an inclined pulling buckling hanging method to form the arch rib. The anchor cables 4 include upstream anchor cables 401 and downstream anchor cables 402, the anchor cable anchors 5 include upstream anchor cable anchors 501 and downstream anchor cable anchors 502, one end of each upstream anchor cable 401 and one end of each downstream anchor cable 402 are respectively connected to an anchor head at the other end of one anchor pulling beam 104, the other ends of all upstream anchor cables 401 are connected to the upstream anchor cable anchors 501, the upstream anchor cable anchors 501 are fixed to the ground at the upstream of the buckle tower 1, the other ends of all downstream anchor cables 402 are connected to the downstream anchor cable anchors 502, the downstream anchor cable anchors 502 are fixed to the ground at the downstream of the buckle tower 1, the upstream anchor cable anchors 501 and the downstream anchor cables 502 are limited by terrain conditions and are irregularly arranged, and the upstream anchor cables 401 and the downstream anchor cables 402 are arranged in a cross-bridge unbalanced state. The transversely unbalanced cable-stayed buckling and hanging system adjusts the offset of the buckling tower 1 in the longitudinal direction of the bridge through the buckling ropes 2 and the anchor cables 4, and maintains the structural stability of the arch rib in the suspension splicing state.
The lateral wind cables 6 are reversely arranged on the side faces of the buckling towers 1 in the shifting direction of the transverse bridge of the buckling towers 1 and are perpendicular to the axis of the bridge, two ends of each lateral wind cable 6 are respectively connected with a lateral wind cable anchor head 105 and a lateral wind cable anchor 7 of the buckling towers 1, and the lateral wind cable anchors 7 are fixed on the ground. The transversely unbalanced cable-stayed buckling and hanging system adjusts the transverse bridge offset of the buckling tower 1 through the side wind cable 6 and maintains the transverse stress balance of the system.
In specific implementation, all the components and the connection structure need to be specifically designed according to the actual engineering situation, and corresponding parameter information such as materials, specifications, quantities and the like is determined through detailed calculation. Firstly, calculating the buckling cable force required for maintaining the arch rib suspension splicing state, then calculating and adjusting the anchor cable force stage by stage according to the buckling cable force, ensuring the longitudinal bridge direction offset of the buckling tower and the longitudinal stress balance of the system in the whole construction process, and then applying the lateral wind cable force stage by stage according to the buckling tower transverse bridge direction offset of each construction stage, and ensuring the buckling tower transverse bridge direction offset and the overall stability of the system.
Taking a project as an example, in a large-span basket arch bridge in a certain mountain area, an arch ring is designed into a structure consisting of a stiff framework and outer concrete, and the span is calculated to be 340m and the rise is calculated to be 74 m. The stiff skeleton is designed into a steel pipe truss arch rib structure, the structure is totally divided into 32 sections, the arch foot is installed to the vault section by adopting a cable hoisting and cable-stayed buckling and hanging method, and due to the limitation of topographic conditions, the buckling and hanging system is designed into a transversely unbalanced cable-stayed buckling and hanging system.
Firstly, according to the actual conditions of engineering, the design characteristics of main structures such as a steel arch rib segment 3, a boundary pier, a bridge approach body 8 and a bridge approach pier 9, as well as factors such as the terrain conditions of onsite mountainous areas such as a river bank line 10, a slope line 11 and a highway 12 and the distribution of structures are comprehensively considered, the positions of a tower buckling tower frame 101, an anchor cable anchorage 5 and a crosswind cable anchorage 7 are reasonably selected, and the arrangement of a buckling and hanging system is preliminarily determined. The boundary pier is used as a bottom structure 102, a buckled tower 101 is arranged on the boundary pier, distribution beams 103 are arranged on the upper portion of the buckled tower 101 in a layered mode along the transverse bridge direction, and tensioning anchor beams 104 are arranged on each layer of the distribution beams 103 along the longitudinal bridge direction.
All components and connection structures in the transversely unbalanced cable-stayed buckling and hanging system are designed specifically according to the actual engineering situation, and the corresponding parameter information such as materials, specifications, quantity and the like is determined through detailed calculation. The tower buckling tower frame 101 is made of steel pipe vertical columns with the diameter of 780 multiplied by 16mm and made of Q345B, sufficient bearing capacity can be provided, the steel pipe vertical columns are connected through steel pipes with the diameter of 325 multiplied by 10mm, and the overall stability of the structure is enhanced. Corresponding to the specific division quantity of the arch rib segments 3, 16 groups of buckle cables 2 and 16 groups of anchor cables 4 are arranged on each bank, the tension operation space and the structural stress of the buckle cables 2 and the anchor cables 4 on the upper portion of the buckle tower frame 101 are considered, three layers of distribution beams 103 are arranged on the upper portion of the buckle tower frame 101, the distribution beams 103 are arranged in the transverse bridge direction, and the specific section size of each layer of distribution beams 103 is determined according to stress calculation. On each layer of distribution beam 103, a tensioning anchor beam 104 is correspondingly arranged according to the number of the required buckling ropes 2 and anchor cables 4. And two ends of each tensioning anchor beam 104 are provided with anchor heads for connecting the buckling ropes 2 and the anchor ropes 4. One end of the arch rib section 3 and one end of the tension anchor beam 104 are connected by a buckle cable 2, and the other end of the anchor cable anchorage 5 and the other end of the tension anchor beam 104 are connected by an anchor cable 4.
Since the project is limited by mountainous terrain and roads 12 pass nearby, the upstream anchor cable 401 and the downstream anchor cable 402 are arranged in an unbalanced manner in the transverse bridge direction. After the stress balance in the longitudinal bridge direction is achieved by adjusting the anchor cables 4 and the buckle cables 2, as the outer fork angle of the downstream anchor cable 402 is obviously larger (as can be seen from fig. 3), the horizontal force at the upper part of the buckle tower frame 101 cannot be completely offset by the distribution beam 103, and the horizontal force in the horizontal unbalance causes the buckle tower frame 101 to shift towards the downstream side, so that the internal stress of the rod piece of the buckle tower frame 101 is obviously increased, and the stress safety of the structure is influenced. At this time, the lateral wind cable 6 is transversely adjusted, the top of the tower-buckling tower frame 101 is provided with a lateral wind cable anchor head 105, the upper end of the lateral wind cable 6 is connected with the lateral wind cable anchor head 105, and the lower end of the lateral wind cable 6 is connected to the lateral wind cable anchor 7. And the side wind cable anchor 7 is arranged at the upstream side of the buckling tower 1, and a connecting line between the side wind cable anchor 7 and the buckling tower 1 is basically vertical to the axis of the bridge. By applying cable force on the side wind cable 6 in stages, the transverse horizontal force generated by unbalance of the anchor cable 4 is resisted, and the purposes of adjusting the transverse offset of the tower buckling tower frame 101 and realizing the overall safety and stability of the system are achieved.
It should be noted that many variations and modifications of the embodiments of the present invention are possible, which are fully described, and are not limited to the specific examples of the above embodiments. The above embodiments are merely illustrative of the present invention and are not intended to limit the present invention. In conclusion, the scope of the present invention should include those changes or substitutions and modifications which are obvious to those of ordinary skill in the art.
Claims (2)
1. A transversely unbalanced cable-stayed buckling and hanging system is characterized by comprising a buckling tower, a buckling cable, an arch rib segment, an anchor cable anchorage, a side wind cable and a side wind cable anchorage;
the buckling tower comprises a buckling tower frame, a bottom structure, distribution beams, stretching anchor beams and side wind cable anchor heads, the buckling tower frame is installed on the bottom structure, more than one layer of distribution beams are arranged at the upper part of the buckling tower frame, the distribution beams are arranged along the transverse bridge direction, the number of the distribution beams on each layer is more than two, a plurality of stretching anchor beams are arranged on each layer of distribution beams at equal intervals along the transverse bridge direction, each stretching anchor beam is arranged along the longitudinal bridge direction, the anchor heads are arranged at two ends of each stretching anchor beam, and the side wind cable anchor heads are arranged at the top of the buckling tower frame;
two ends of each buckling cable are respectively connected with an anchor head at one end of one pulling anchor beam and a buckling point on one arch rib section; the anchor cables comprise upstream anchor cables and downstream anchor cables, the anchor cables comprise upstream anchor cable anchors and downstream anchor cable anchors, one end of each upstream anchor cable and one end of each downstream anchor cable are respectively connected with an anchor head at the other end of one anchor pulling beam, the other ends of all the upstream anchor cables are connected with the upstream anchor cable anchors, the upstream anchor cable anchors are fixed on the ground at the upstream of the buckling tower, the other ends of all the downstream anchor cables are connected with the downstream anchor cable anchors, the downstream anchor cable anchors are fixed on the ground at the downstream of the buckling tower, and the upstream anchor cable anchors and the downstream anchor cable anchors are irregularly arranged, so that the upstream anchor cables and the downstream anchor cables are arranged in a cross-bridge unbalanced state;
the side wind cables are reversely arranged on the side faces of the buckled towers in the offset direction along the transverse bridge of the buckled towers and are perpendicular to the axis of the bridge, the two ends of each side wind cable are respectively connected with the side wind cable anchor heads and the side wind cable anchors of the buckled towers, and the side wind cable anchors are fixed on the ground.
2. The laterally unbalanced cable-stayed buckling system according to claim 1, wherein the number of the buckling cables and the anchor cables corresponds to the number of the tensioned anchor beams of the buckling tower.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2020205215566 | 2020-04-10 | ||
| CN202020521556 | 2020-04-10 |
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| CN213538648U true CN213538648U (en) | 2021-06-25 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115369780A (en) * | 2022-09-07 | 2022-11-22 | 腾达建设集团股份有限公司 | Balance device and method for asymmetric stressed cantilever beam |
| CN116516833A (en) * | 2023-06-12 | 2023-08-01 | 广西路桥工程集团有限公司 | Method for adjusting horizontal force of buckling tower of cable-stayed buckling system |
| CN116641297A (en) * | 2023-06-07 | 2023-08-25 | 广西路桥工程集团有限公司 | A cable-stayed buckle-hanging system and construction method for an arch bridge |
| CN119465795A (en) * | 2024-12-24 | 2025-02-18 | 中铁上海工程局集团有限公司 | A method for vertical assembly and rotation of arch ribs |
-
2020
- 2020-09-16 CN CN202022029279.XU patent/CN213538648U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115369780A (en) * | 2022-09-07 | 2022-11-22 | 腾达建设集团股份有限公司 | Balance device and method for asymmetric stressed cantilever beam |
| CN116641297A (en) * | 2023-06-07 | 2023-08-25 | 广西路桥工程集团有限公司 | A cable-stayed buckle-hanging system and construction method for an arch bridge |
| CN116516833A (en) * | 2023-06-12 | 2023-08-01 | 广西路桥工程集团有限公司 | Method for adjusting horizontal force of buckling tower of cable-stayed buckling system |
| CN119465795A (en) * | 2024-12-24 | 2025-02-18 | 中铁上海工程局集团有限公司 | A method for vertical assembly and rotation of arch ribs |
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