CN219280526U - Structure for longitudinally ejecting and dismantling existing bridge - Google Patents
Structure for longitudinally ejecting and dismantling existing bridge Download PDFInfo
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- CN219280526U CN219280526U CN202320570498.XU CN202320570498U CN219280526U CN 219280526 U CN219280526 U CN 219280526U CN 202320570498 U CN202320570498 U CN 202320570498U CN 219280526 U CN219280526 U CN 219280526U
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- 229910000831 Steel Inorganic materials 0.000 claims description 58
- 239000010959 steel Substances 0.000 claims description 58
- 238000009432 framing Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 19
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 8
- 238000011065 in-situ storage Methods 0.000 description 5
- 230000003014 reinforcing effect Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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Abstract
The utility model discloses a structure for longitudinally ejecting and dismantling an existing bridge, belongs to the technical field of highway and municipal traffic engineering, and solves the problems that an old overpass needs to be dismantled in the engineering such as new overpass construction, old bridge reconstruction and the like of a highway and an urban road, and when the traffic under the bridge is busy, the traffic cannot be interrupted and the old bridge cannot be dismantled. The existing bridge body is properly reinforced, then proper places are found at two sides of a crossing road and used as dismantling platforms, the bridge body is jacked to the dismantling platforms to be dismantled by walking type pushing, the traffic of the existing bridge road can be uninterrupted, the influence of bridge dismantling on the bridge road is minimized, and the bridge dismantling device has good economic benefit and social benefit.
Description
Technical Field
The utility model belongs to the technical field of highway and municipal traffic engineering, and particularly relates to a structure for longitudinally ejecting and dismantling an existing bridge.
Background
Along with the development of society, the construction of infrastructure also changes in the daily and monthly places, the traffic system is developed more and more, the rapid development of traffic network brings more and more convenience to the travel of people. When the existing bridge is damaged and cannot be used continuously or the old bridge cannot meet the urban construction and traffic requirements, the existing bridge needs to be dismantled or rebuilt, and the dismantling of the overpass bridge inevitably causes great interference to the traffic under the bridge.
The traditional bridge dismantling method mostly adopts in-situ dismantling, and the general construction method comprises three modes of in-situ integral dismantling, in-situ sectional dismantling and hoisting dismantling. In-situ integral dismantling mode, a full-bore bracket is generally erected, a small-span supporting beam is used for keeping through a local lane, and the road under the bridge is required to be totally or partially closed to interrupt or limit the traffic of vehicles under the bridge; in-situ sectional dismantling mode, the beam body is usually cut, and meanwhile, a bracket is required to be erected to partially seal the road under the bridge, and the traffic of vehicles under the bridge is interrupted or limited; the lifting and dismantling mode is used for limiting the weight of the beam, is generally used for bridges with smaller spans, and can interrupt or limit the traffic of vehicles under the bridge during the lifting construction.
For the expressway with heavy traffic and the urban road, the bridge is crossed, the space under the bridge is often limited, the bracket is difficult to build, and the traditional dismantling mode cannot meet the construction requirement under the complex condition. It is necessary to study a new way of dismantling bridges.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model provides a structure for longitudinally ejecting and dismantling the existing bridge, which adopts the structure for properly reinforcing the existing bridge body, then finds proper places at two sides of a crossing road as dismantling platforms, and utilizes walking type pushing to push the existing bridge body crossing a busy street to construction sites at two sides for dismantling without interrupting road traffic under the bridge, so that the influence of the bridge dismantling on the road under the bridge is minimized, and the utility model has good economic benefit and social benefit. The method solves the problems that the old overpass needs to be dismantled in projects such as new overpass construction of roads and urban roads, transformation of the old overpass and the like, and the old overpass cannot be dismantled when the traffic under the bridge is busy and cannot be interrupted, and is a novel treatment mode.
In order to solve the problems, the utility model adopts the following technical scheme: the utility model provides a structure of existing bridge is demolishd in vertical ejecting, includes bridge removal support platform, existing bridge wait to demolish the roof beam body, external prestressing steel restraints of beam portion, steel restraint guide block, back steel nose girder, pushing away platform, pushing away equipment, existing pier and temporary mound, bridge removal support platform wait to demolish the roof beam body with existing bridge and be connected, bridge removal support platform wait to demolish Liang Tian and install on existing pier with existing bridge, existing bridge wait to demolish to set up pushing away the platform on the existing pier of roof beam body, pushing away to set up pushing away equipment on pushing away to add the external prestressing steel restraints of beam portion on existing bridge wait to demolish the roof beam body, simultaneously set up back steel nose girder at pushing away the rear end of orientation.
Preferably, the bridge-removing support platform is built by adopting a full framing.
Preferably, temporary piers are added on the sides of the existing piers, and bailey beams are erected on the temporary piers to serve as bridge-dismantling support platforms.
Preferably, the steel beam on the top plate of the beam part external prestress steel beam is made on the top surface of the beam body to be dismantled of the existing bridge, and a steel beam guide block is arranged at the position of the beam top surface planted with the steel bar; the bottom steel bundles of the beam part external prestress steel bundles are arranged on the top surface of the lower bottom plate of the box beam or the position close to the bottom surface outside the beam body web plate, and steel bundle guide blocks are arranged at the positions of the steel bar planting; the external prestress steel beam of the beam part passes through the steel beam guide block and is fixed at the beam end of the beam body to be dismantled of the existing bridge.
Preferably, the pushing platform adopts a steel structure platform.
Preferably, the pushing device is jack combination device, which needs to be capable of lifting upwards, moving longitudinally against the object and moving transversely.
The construction method for ejecting and dismantling the existing bridge has the following advantages:
(1) The space outside the road is fully utilized, the beam body is dismantled outside the road traffic influence range, and the construction process is safe and reliable.
(2) The pushing process of the beam body is shorter, the beam body is detached and separated from road traffic, traffic pressure can be effectively relieved, and the method is particularly suitable for urban roads and high-grade roads with large traffic volume, and creates conditions for normal operation of the roads.
(3) The bridge-dismantling support platform, the external prestress steel beam, the steel guide beam, the pushing platform and the pushing equipment can be implemented simultaneously, so that the construction period can be greatly shortened.
(4) The installation is simple and convenient, the construction period is short, the technology is reliable and safe, the operation and maintenance cost is low, the economy and the applicability are realized, and the technology is innovative.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic illustration of a push front elevation arrangement of the present utility model;
FIG. 2 is a schematic illustration of a push mid-elevation arrangement of the present utility model;
FIG. 3 is a schematic illustration of a push-in-place elevation arrangement of the present utility model;
FIG. 4 is a beam reinforcement elevation schematic of the present utility model;
FIG. 5 is a schematic view of a beam reinforcement plane of the present utility model;
fig. 6 is a schematic diagram of the bridge pier arrangement of the present utility model.
In the figure: the bridge-dismantling support platform comprises a 1-bridge-dismantling support platform, a 2-bridge to be dismantled, a 3-beam part external prestress steel beam, a 4-steel beam guide block, a 5-rear steel guide beam, a 6-pushing platform, 7-pushing equipment, 8-existing bridge piers and 9-temporary piers.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1-6, the structure for longitudinally ejecting and dismantling the existing bridge comprises a bridge dismantling support platform 1, an existing bridge to be dismantled beam body 2, a beam part external prestress steel beam 3, a steel beam guide block 4, a rear steel guide beam 5, a pushing platform 6, pushing equipment 7, an existing bridge pier 8 and a temporary pier 9.
The bridge dismantling support platform 1 is arranged at the front end or the rear end according to the site condition of the front end and the rear end of the bridge dismantling body 2 of the existing bridge belt, when the site of a shorter bridge is not limited, the bridge dismantling support platform 1 is built by adopting a full framing, when the site of the shorter bridge is limited, the existing bridge pier 8 is utilized, a temporary pier 9 is added on the edge of the bridge dismantling support platform, and then a beret beam is built on the temporary pier 9 to serve as the bridge dismantling support platform 1.
The beam body 2 to be dismantled of the existing bridge generally spans a busy road, and the road traffic under the beam body is greatly influenced by site dismantling, so that the influence range of the road under the bridge is required to be ejected, and the beam body can be dismantled on the bracket. In order not to influence traffic under a bridge and improve the stability of a pushing process, a walking type pushing process is adopted, in the pushing process, the situation that tension and pressure appear alternately at each part of a beam body is different from a fixed stress mode of the beam body, the beam body is prevented from being broken under the condition that the same-direction force is superposed, dangers appear, an extra-body pre-stress steel beam 3 of the beam body is calculated according to the pushing construction process to protect the beam body 2 to be removed of the existing bridge, and meanwhile, a rear steel guide beam 5 is arranged at the rear end of the pushing direction to avoid dangers when the beam end is suspended.
The beam part external prestress steel beam 3 is arranged for reinforcing and protecting the beam body 2 to be dismantled of the existing bridge, steel beams on a top plate of the beam part external prestress steel beam are arranged on the top surface of the beam body 2 to be dismantled of the existing bridge, and steel beam guide blocks 4 are arranged on the top surface of the bridge according to calculated positions; the bottom steel beam is arranged on the top surface of the lower bottom plate of the box girder or the outer side of the web plate of the girder body near the bottom surface, and steel beam guide blocks 4 are arranged at the calculating position by planting bars. The external prestress steel beam 3 of the beam part passes through the steel beam guide block 4 and is fixed at the beam end of the beam body 2 to be dismantled of the existing bridge.
The pushing platform 6 utilizes the bridge pier of the beam body 2 to be dismantled by the existing bridge, builds a steel structure platform according to calculation within the allowable operation range, enlarges the pier top area, and meets the installation and construction operation space of the pushing equipment 7.
The pushing device 7 is jack combination device, in order to meet the requirement of walking type pushing, the requirement of lifting upwards and longitudinally moving against an object is required, and meanwhile, the object can be transversely moved for correcting left-right deviation or linear adjustment of curve beam pushing in the pushing process. The type and the size of the jack are calculated and determined according to the number of the beam body 2 to be removed and the pushing equipment 7 of the existing bridge.
In the pushing process of the beam body 2 to be removed of the existing bridge, according to the requirements of the size and the construction period of the bridge removing support platform 1, the beam body 2 to be removed of the existing bridge can be considered to be completely pushed to the bridge removing support platform 1, and then is removed at one time. Part of the steel guide beam 5 can be pushed onto the bridge-dismantling support platform 1, namely, part of the steel guide beam is dismantled, the dismantling length of the steel guide beam is determined according to the requirement, and the steel guide beam is guaranteed to smoothly enter the bridge-dismantling support platform 1 and be dismantled smoothly.
The main construction steps of the utility model are as follows:
1. and building a bridge-removing bracket platform 1 and a pushing platform 6 according to the design construction temporary pier 9.
2. And (4) constructing a steel beam guide block 4.
3. And (3) constructing a beam body external prestress steel beam 3, and reinforcing the beam body.
4. And (5) a steel guide beam after construction.
5. And constructing pushing equipment 7 on the pushing platform 6.
6. The beam body is jacked by jacking equipment 7, and the beam body is jacked towards the bridge-dismantling support platform 1 according to a set direction.
7. After the pushing of the girder body is finished, the steel guide girder 5 is removed after the bridge-dismantling support platform 1 is removed, and the girder body 2 of the existing bridge is removed.
8. And dismantling the bridge-dismantling support platform 1 and the temporary pier 9.
9. And dismantling the existing bridge pier 8, leveling the field and finishing dismantling construction.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (6)
1. The utility model provides a structure of existing bridge is demolishd in vertical ejecting, its characterized in that, including bridge removal support platform (1), existing bridge wait to demolish roof beam body (2), the external prestressing steel bundle of beam portion (3), steel bundle guide block (4), back steel guide beam (5), push away platform (6), push away equipment (7), existing pier (8) and interim mound (9), bridge removal support platform (1) be connected with existing bridge wait to demolish roof beam body (2), bridge removal support platform (1) and existing bridge wait to demolish roof beam body (2) and install on existing pier (8), existing bridge wait to demolish and set up on existing pier (8) of roof beam body (2) and push away platform (6) and set up pushing away equipment (7), increase beam portion external prestressing steel bundle (3) on existing bridge wait to demolish roof beam body (2), simultaneously at the rear end in pushing away the orientation to set up back steel guide beam (5).
2. The structure for removing an existing bridge through longitudinal ejection according to claim 1, wherein the bridge removing support platform (1) is built by using a full framing.
3. The structure for longitudinally ejecting and dismantling the existing bridge according to claim 1, wherein temporary piers (9) are added on the sides of the existing bridge pier (8), and bailey beams are erected on the temporary piers (9) to serve as a bridge dismantling support platform (1).
4. A structure for longitudinally ejecting and dismantling an existing bridge according to any one of claims 1-3, characterized in that steel bundles on a top plate of the pre-stress steel bundles (3) outside the bridge part are made on the top surface of the bridge body (2) to be dismantled of the existing bridge, and steel bundle guide blocks (4) are arranged at the positions of bar planting on the top surface of the bridge; the bottom steel bundles of the beam part external prestress steel bundles (3) are arranged on the top surface of the lower bottom plate of the box beam or the outer side of the web plate of the beam body near the bottom surface, and steel bundle guide blocks (4) are arranged at the positions of the steel bar planting; the external prestress steel beam (3) of the beam part passes through the steel beam guide block (4) and is fixed at the beam end of the beam body (2) to be dismantled of the existing bridge.
5. A structure for removing an existing bridge by longitudinal ejection according to any one of claims 1 to 3, wherein the pushing platform (6) is a steel structure platform.
6. A structure for removing an existing bridge by longitudinal ejection according to any one of claims 1-3, wherein the pushing device (7) is a jack combination device, which is required to be capable of lifting upwards, moving longitudinally against an object, and simultaneously moving the object laterally.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320570498.XU CN219280526U (en) | 2023-03-22 | 2023-03-22 | Structure for longitudinally ejecting and dismantling existing bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320570498.XU CN219280526U (en) | 2023-03-22 | 2023-03-22 | Structure for longitudinally ejecting and dismantling existing bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219280526U true CN219280526U (en) | 2023-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320570498.XU Active CN219280526U (en) | 2023-03-22 | 2023-03-22 | Structure for longitudinally ejecting and dismantling existing bridge |
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| Country | Link |
|---|---|
| CN (1) | CN219280526U (en) |
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- 2023-03-22 CN CN202320570498.XU patent/CN219280526U/en active Active
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