CN210737389U - Guide beam device with pre-tensioning stress and guide beam assembly - Google Patents
Guide beam device with pre-tensioning stress and guide beam assembly Download PDFInfo
- Publication number
- CN210737389U CN210737389U CN201921584584.6U CN201921584584U CN210737389U CN 210737389 U CN210737389 U CN 210737389U CN 201921584584 U CN201921584584 U CN 201921584584U CN 210737389 U CN210737389 U CN 210737389U
- Authority
- CN
- China
- Prior art keywords
- support body
- girder
- pull rod
- strength bolt
- prestressing force
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Bridges Or Land Bridges (AREA)
Abstract
The utility model relates to a bridge erection technical field, especially a nose girder device and nose girder subassembly with pretension stress, wherein the nose girder device includes the support body, the root of support body is provided with first high strength bolt group, first high strength bolt group be used for with the support body is connected on the girder, still including a plurality of prestressing force pull rods, the one end of prestressing force pull rod with the support body is connected, the other end with the girder is connected. A nose girder device with pretension stress, transmit the hogging moment that the nose girder bore through first high strength bolt group, make support body and girder become an organic whole, when concrete beam body cantilever overlength caused the hogging moment that the nose girder bore too big, it is closed with the junction of girder front end to guarantee the nose girder through the prestressing force pull rod that is in the pretension stress state, greatly reduced appears the potential safety hazard that the fracture exists because of the junction of nose girder and girder front end.
Description
Technical Field
The utility model relates to a bridge erects technical field, especially a nose girder device and nose girder subassembly with pretension stress.
Background
When a dragging method or a pushing method is used for erecting a beam, a guide beam is used as a temporary auxiliary structure to ensure the longitudinal anti-overturning stability of the beam during movement and reduce the overhanging length of the beam so as to reduce the installation stress, the guide beam is usually arranged at the front end of a main beam, the existing guide beam is generally a steel truss beam or a steel plate beam with an equal cross section or a variable cross section, an embedded part is arranged at the front end of the main beam, and the guide beam is connected with the steel guide beam through a bolt through the embedded part.
However, when the guide beam is used for large-span pushing construction, the too long cantilever of the concrete beam body causes the too large negative bending moment borne by the guide beam, and generates too large tensile stress, so that a crack occurs at the joint of the guide beam and the front end of the main beam, and great potential safety hazard exists.
Therefore, in view of the above, there is a need for a guide beam device to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: aiming at the problems that in the prior art, when the guide beam is used for large-span pushing construction, the overlong cantilever of the concrete beam body causes overlarge negative bending moment borne by the guide beam, so that the joint of the guide beam and the front end of the main beam is cracked, and great potential safety hazards exist, the guide beam device with pre-tensioning stress and the guide beam assembly are provided.
In order to realize the purpose, the utility model discloses a technical scheme be:
a guide beam device with pre-tensioning stress comprises a frame body, wherein a first high-strength bolt group is arranged at the root of the frame body and used for connecting the frame body to a main beam, and the guide beam device also comprises a plurality of pre-tensioning pull rods, wherein one ends of the pre-tensioning pull rods are connected with the frame body, and the other ends of the pre-tensioning pull rods are connected with the main beam.
When being installed, the guide beam device with the pre-tensioning stress of the utility model firstly connects the frame body and the main beam with a plurality of pre-tensioning pull rods through the first high-strength bolt group, and leads the pre-tensioning pull rods to be in a pre-tensioning state; during construction, the negative bending moment borne by the guide beam is transmitted mainly through the first high-strength bolt group, so that the frame body and the main beam are integrated, when the negative bending moment borne by the guide beam is too large due to the fact that the cantilever of the concrete beam body is too long, the connection between the guide beam and the front end of the main beam is closed through the prestressed pull rod in the prestressed state, and potential safety hazards caused by cracks at the connection between the guide beam and the front end of the main beam are greatly reduced.
Preferably, be provided with on the support body a plurality of with the corresponding connecting pipe of prestressing force pull rod, the prestressing force pull rod runs through correspondingly the connecting pipe, the prestressing force pull rod is close to the one end of support body be provided with first screw thread portion and with first screw thread portion matched with first nut, first nut external diameter is greater than the internal diameter of connecting pipe.
When the device is installed, the prestress pull rod penetrates through the corresponding connecting pipe and then is connected with the main beam, then a first nut is arranged on a first thread part at one end, close to the frame body, of the prestress pull rod, then the first nut is installed, the outer diameter of the first nut is larger than the inner diameter of the connecting pipe, the connecting pipe can serve as a support, the first nut is in thread fit with the first thread part, the first nut moves towards one end of the connecting pipe, and after one end is away from the connecting pipe, the prestress pull rod can be in a prestress state.
Preferably, the support body includes two at least sections support body units, and is adjacent the support body unit is connected through four at least groups second high strength bolt group, is located the root the support body unit is used for being connected with the girder, the connecting pipe sets up be located the root on the support body unit.
The support body is formed through the concatenation of two sections at least support body units, and its preparation, transportation are easier, and are convenient, and moreover, adjacent the support body unit is connected through four group at least second high strength bolt groups, and it does not influence the whole bending resistance's of support body ability.
Preferably, the frame body unit located at the root comprises two side piece frames which are arranged at a vertical interval, the two corresponding ends of the side piece frames are respectively connected through a cross piece frame, and all the connecting pipes are distributed on the two side piece frames.
The vertical bending moment born by the frame body is mainly born by the side piece frames, so that all the connecting pipes are distributed on the two side piece frames and are matched with the prestressed pull rod, and during construction, the connection part of the guide beam and the front end of the main beam can be better ensured to be closed by the prestressed pull rod in a prestressed state, so that the potential safety hazard caused by the crack at the connection part of the guide beam and the front end of the main beam is greatly reduced.
Preferably, the number of the connection pipes is an even number, and all the connection pipes are equally distributed on the two side panel frames.
Preferably, all the connection pipes on the same side panel frame are vertically spaced apart.
Preferably, the side panel frames and the cross panel frames are connected by at least one third high-strength bolt group.
The side piece frame is connected with the transverse piece frame through at least one group of third high-strength bolt groups, so that a frame structure formed by the side piece frame and the transverse piece frame is more stable.
Preferably, at least one group of the first high-strength bolt groups is respectively arranged at two vertical ends of the root part of each side piece frame.
The utility model also discloses a nose girder subassembly of nose girder device with pretension stress, including the girder with like this application the nose girder device, nose girder device root is provided with first high strength bolt group, the nose girder device with the girder passes through first high strength bolt group is connected, still including a plurality of prestressing force pull rods, the one end of prestressing force pull rod with the nose girder device is connected, the other end with the girder is connected.
When being installed, the guide beam assembly of the guide beam device with the pre-tensioning stress of the utility model is characterized in that the frame body and the main beam are connected with a plurality of pre-tensioning pull rods through the first high-strength bolt group, and the pre-tensioning pull rods are in a pre-tensioning state; during construction, the negative bending moment borne by the guide beam is transmitted mainly through the first high-strength bolt group, so that the frame body and the main beam are integrated, when the negative bending moment borne by the guide beam is too large due to the fact that the cantilever of the concrete beam body is too long, the connection between the guide beam and the front end of the main beam is closed through the prestressed pull rod in the prestressed state, and potential safety hazards caused by cracks at the connection between the guide beam and the front end of the main beam are greatly reduced.
Preferably, at least two cross beams are arranged on the main beam, connecting holes corresponding to the prestressed pull rods are formed in the cross beams, the prestressed pull rods penetrate through the corresponding connecting holes, second threaded portions and second nuts matched with the second threaded portions are arranged at one ends, close to the main beam, of the prestressed pull rods, and the outer diameters of the second nuts are larger than the hole diameters of the connecting holes.
When the device is installed, after the prestressed pull rod is connected with the guide beam device, the prestressed pull rod penetrates through the corresponding connecting hole, then a first nut is installed on a second thread part of one end, close to the main beam, of the prestressed pull rod, and then the outer diameter of the second thread part is larger than the aperture of the connecting hole, so that the cross beam can be used as a support, the second nut is in thread fit with the second thread part, the second nut moves towards one end of the connecting hole, and after one end is moved for a distance, the prestressed pull rod can be in a prestressed state.
In the above scheme, the first nut may be adjusted to move the first nut toward one end of the connecting pipe, the second nut may be adjusted to move the second nut toward one end of the connecting hole, or the first nut and the second nut may be adjusted to be relatively close to each other at the same time, so that the prestressed pull rod is finally in a prestressed state.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
1. the utility model provides a nose girder device with pretension stress, the hogging moment that the nose girder bore is transmitted through first high strength bolt group, make support body and girder become an organic whole, when concrete beam body cantilever overlength caused the hogging moment that the nose girder bore too big, guarantee through the prestressing force pull rod that is in the pretension stress state that the junction of nose girder and girder front end is closed, greatly reduced because of the potential safety hazard that the crack exists appears in the junction of nose girder and girder front end.
2. The utility model provides a nose girder device and nose girder subassembly with prestressing force, all the connecting pipe distributes in two on the lateral plate frame to cooperate with the prestressing force pull rod, can guarantee better that the junction of nose girder and girder front end is closed through the prestressing force pull rod that is in the prestressing force state, greatly reduced because of the potential safety hazard that the crack exists appears in the junction of nose girder and girder front end.
3. The utility model provides a nose girder subassembly of nose girder device with pretension stress, the hogging moment that the nose girder bore is transmitted through first high strength bolt group, make support body and girder become an organic whole, when concrete beam body cantilever overlength causes the hogging moment that the nose girder bore too big, it is closed to guarantee the junction of nose girder and girder front end through the prestressing force pull rod that is in the pretension stress state, greatly reduced because of the potential safety hazard that the crack exists appears in the junction of nose girder and girder front end.
Drawings
FIG. 1 is a front view of a pre-stressed guide beam assembly according to the present application;
FIG. 2 is a schematic illustration of a pre-stressed girder assembly according to the present application in conjunction with a main girder;
FIG. 3 is a schematic view of the side panel frame and cross panel frame of the present application in combination.
The labels in the figure are: 1-beam guide device, 10-frame body, 11-connecting pipe, 12-frame body unit, 121-side sheet frame, 122-cross sheet frame, 13-second high-strength bolt group, 14-third high-strength bolt group, 2-first high-strength bolt group, 3-main beam, 31-cross beam, 311-connecting hole and 4-prestress pull rod.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Example 1
As shown in fig. 1 to 3, a pre-stressed beam guiding device includes a frame body 10, a first high-strength bolt set 2 is disposed at the root of the frame body 10, the first high-strength bolt set 2 is used for connecting the frame body 10 to a main beam 3, and a plurality of pre-stressed pull rods 4, one end of each pre-stressed pull rod 4 is connected to the frame body 10, and the other end is connected to the main beam 3.
When the guide beam device with the pre-tensioning stress is installed, the frame body 10 and the main beam 3 are connected with a plurality of pre-tensioning pull rods 4 through the first high-strength bolt group 2, and the pre-tensioning pull rods 4 are in a pre-tensioning stress state; during construction, the hogging moment borne by the guide beam is transmitted mainly through the first high-strength bolt group 2, so that the frame body 10 and the main beam 3 are integrated, when the hogging moment borne by the guide beam is too large due to too long cantilever of the concrete beam body, the connection between the guide beam and the front end of the main beam is closed through the pre-stressed pull rod 4 in a pre-stressed state, and potential safety hazards caused by cracks at the connection between the guide beam and the front end of the main beam are greatly reduced.
On the basis, in a further preferred mode, the frame body 10 is provided with a plurality of connecting pipes 11 corresponding to the prestressed pull rods 4, the prestressed pull rods 4 penetrate through the corresponding connecting pipes 11, the prestressed pull rods 4 are close to one ends of the frame body 10 are provided with first thread portions and first nuts matched with the first thread portions, and the outer diameters of the first nuts are larger than the inner diameters of the connecting pipes 11.
When the prestressed tension rod 4 is installed, the prestressed tension rod 4 penetrates through the corresponding connecting pipe 11 and then is connected with the main beam 3, then a first nut is arranged on a first thread part at one end, close to the frame body 10, of the prestressed tension rod 4, and then the first nut is installed, because the outer diameter of the first nut is larger than the inner diameter of the connecting pipe 11, the connecting pipe 11 can be used as a support, the first nut is in threaded fit with the first thread part, the first nut is enabled to move towards one end of the connecting pipe 11, and after one end is away from the first thread part, the prestressed tension rod 4 can be in a prestressed state.
On the basis, in a further preferable mode, the frame body 10 includes at least two sections of frame body units 12, the adjacent frame body units 12 are connected through at least four second high-strength bolt groups 13, the frame body unit 12 located at the root is used for being connected with the main beam 3, and the connecting pipe 11 is arranged on the frame body unit 12 located at the root.
The frame body 10 is formed by splicing at least two sections of frame body units 12, the manufacturing and the transportation are easier and more convenient, and the adjacent frame body units 12 are connected through at least four groups of second high-strength bolt groups 13 without influencing the whole bending resistance of the frame body 10.
On the basis, in a further preferred mode, the frame body unit 12 located at the root portion includes two side sheet frames 121 vertically arranged at intervals, two corresponding two ends of the two side sheet frames 121 are respectively connected through a cross sheet frame 122, and all the connecting pipes 11 are distributed on the two side sheet frames 121.
Because the vertical bending moment borne by the frame body 10 is mainly borne by the side piece frames 121, all the connecting pipes 11 are distributed on the two side piece frames 121 and are matched with the prestressed pull rod 4, and during construction, the connection between the guide beam and the front end of the main beam can be better ensured to be closed through the prestressed pull rod 4 in a prestressed state, so that the potential safety hazard caused by cracks at the connection between the guide beam and the front end of the main beam is greatly reduced.
In addition to the above, it is further preferable that the number of the connection pipes 11 is even, and all the connection pipes 11 are equally distributed on the two side sheet frames 121.
In addition to the above, it is further preferable that all the connection pipes 11 on the same side sheet frame 121 are vertically spaced.
In addition to the above, it is further preferable that the side panel frames 121 and the cross panel frames 122 are connected by at least one third high-strength bolt group 14.
The side panel frame 121 is connected to the cross-piece frame 122 through at least one third set of high-strength bolts 14, so that the frame structure formed by the side panel frame 121 and the cross-piece frame 122 is more stable.
In addition, in a further preferable mode, at least one first high-strength bolt group 2 is respectively disposed at two vertical ends of the root portion of each side sheet frame 121.
Example 2
As shown in fig. 2 and 3, a guiding beam assembly of a guiding beam device with pretension comprises a main beam 3 and the guiding beam device 1 according to embodiment 1, wherein the root of the guiding beam device 1 is provided with a first high-strength bolt group 2, the guiding beam device 1 is connected with the main beam 3 through the first high-strength bolt group 2, and further comprises a plurality of prestressing pull rods 4, one end of each prestressing pull rod 4 is connected with the guiding beam device 1, the other end of each prestressing pull rod is connected with the main beam 3, wherein the main beam 3 is provided with at least two cross beams 31, the cross beams 31 are provided with connecting holes 311 corresponding to the prestressing pull rods 4, the prestressing pull rods 4 penetrate through the corresponding connecting holes 311, one end of each prestressing pull rod 4 close to the main beam 3 is provided with a second thread part and a second nut matched with the second thread part, the outer diameter of the second nut is larger than the aperture of the connection hole 311.
When being installed, the guide beam assembly of the guide beam device with the pre-tensioning stress of the utility model is characterized in that the frame body 10 and the main beam 3 are connected with a plurality of pre-tensioning pull rods 4 through the first high-strength bolt group 2, and the pre-tensioning pull rods 4 are in a pre-tensioning stress state; during construction, the hogging moment borne by the guide beam is transmitted mainly through the first high-strength bolt group 2, so that the frame body 10 and the main beam 3 are integrated, when the hogging moment borne by the guide beam is too large due to too long cantilever of the concrete beam body, the connection between the guide beam and the front end of the main beam is closed through the pre-stressed pull rod 4 in a pre-stressed state, and potential safety hazards caused by cracks at the connection between the guide beam and the front end of the main beam are greatly reduced.
When the prestressed tension rod 4 is installed, after the prestressed tension rod 4 is connected with the girder guide device 1, the prestressed tension rod 4 passes through the corresponding connecting hole 311, then a first nut is installed on a second thread part at one end of the prestressed tension rod 4 close to the girder 3, then the outer diameter of the second thread part is larger than the aperture of the connecting hole 311, so that the cross beam 31 can be used as a support, the second nut is in thread fit with the second thread part, the second nut moves towards one end of the connecting hole 311, and after one end is moved for a distance, the prestressed tension rod 4 can be in a prestressed state.
In the above solution, after the prestressed tension rod 4 passes through the corresponding connecting hole 311 and the corresponding connecting pipe 11, the first nut and the second nut are adjusted to be relatively close to each other, and finally the prestressed tension rod 4 is in a prestressed state.
It is also possible to adjust one of the first nut or the second nut to a position and then to adjust the other nut so that the first nut and the second nut are relatively close to each other, and finally to place the prestressed tension rod 4 in a prestressed state.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A guide beam device with pretension stress, characterized in that: including support body (10), the root of support body (10) is provided with first high strength bolt group (2), first high strength bolt group (2) be used for with support body (10) are connected on girder (3), still including a plurality of prestressing force pull rods (4), the one end of prestressing force pull rod (4) with support body (10) are connected, the other end with girder (3) are connected.
2. The apparatus of claim 1, wherein: be provided with on support body (10) a plurality of with corresponding connecting pipe (11) of prestressing force pull rod (4), prestressing force pull rod (4) run through correspondingly connecting pipe (11), prestressing force pull rod (4) are close to the one end of support body (10) be provided with first screw thread portion and with first screw thread portion matched with first nut, first nut external diameter is greater than the internal diameter of connecting pipe (11).
3. The apparatus of claim 2, wherein: the support body (10) comprises at least two sections of support body units (12), the adjacent support body units (12) are connected through at least four groups of second high-strength bolt groups (13), the support body units (12) located at the root are used for being connected with the main beam (3), and the connecting pipes (11) are arranged on the support body units (12) located at the root.
4. A prestressed guide beam unit according to claim 3, characterized in that: the rack body unit (12) located at the root comprises two side piece frames (121) which are vertically arranged at intervals, the two corresponding ends of the side piece frames (121) are connected through cross piece frames (122), and all the connecting pipes (11) are distributed on the two side piece frames (121).
5. The apparatus of claim 4, wherein: the number of the connecting pipes (11) is even, and all the connecting pipes (11) are evenly distributed on the two side piece frames (121).
6. The apparatus of claim 4, wherein: all the connecting pipes (11) on the same side piece frame (121) are arranged at intervals in the vertical direction.
7. The apparatus of claim 4, wherein: the side panel frame (121) and the cross panel frame (122) are connected by at least one third high-strength bolt group (14).
8. The apparatus of claim 4, wherein: and two vertical ends of the root part of each side piece frame (121) are respectively provided with at least one group of first high-strength bolt groups (2).
9. A guide beam assembly having a pre-stressed guide beam arrangement, comprising: the beam guide device comprises a main beam (3) and the beam guide device (1) as claimed in any one of claims 1 to 8, wherein a first high-strength bolt group (2) is arranged at the root of the beam guide device (1), the beam guide device (1) is connected with the main beam (3) through the first high-strength bolt group (2), the beam guide device further comprises a plurality of prestressed pull rods (4), one end of each prestressed pull rod (4) is connected with the beam guide device (1), and the other end of each prestressed pull rod is connected with the main beam (3).
10. The guide beam assembly of claim 9, wherein: be provided with two piece at least crossbeams (31) on girder (3), be provided with on crossbeam (31) with corresponding connecting hole (311) of prestressing force pull rod (4), prestressing force pull rod (4) run through the correspondence connecting hole (311), prestressing force pull rod (4) are close to the one end of girder (3) is provided with second screw thread portion and with second screw thread portion matched with second nut, second nut external diameter is greater than the aperture of connecting hole (311).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921584584.6U CN210737389U (en) | 2019-09-23 | 2019-09-23 | Guide beam device with pre-tensioning stress and guide beam assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921584584.6U CN210737389U (en) | 2019-09-23 | 2019-09-23 | Guide beam device with pre-tensioning stress and guide beam assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210737389U true CN210737389U (en) | 2020-06-12 |
Family
ID=70985632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921584584.6U Active CN210737389U (en) | 2019-09-23 | 2019-09-23 | Guide beam device with pre-tensioning stress and guide beam assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210737389U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113832859A (en) * | 2021-09-22 | 2021-12-24 | 中建钢构工程有限公司 | Construction method for connecting joint of steel box girder and guide beam |
-
2019
- 2019-09-23 CN CN201921584584.6U patent/CN210737389U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113832859A (en) * | 2021-09-22 | 2021-12-24 | 中建钢构工程有限公司 | Construction method for connecting joint of steel box girder and guide beam |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108894430B (en) | Construction method for reinforcing steel structure beam or column | |
| CN210737389U (en) | Guide beam device with pre-tensioning stress and guide beam assembly | |
| CN109750791A (en) | A kind of assembled large overhanging steel structure | |
| KR20090027075A (en) | Beam, structure, parking structure having the beam, method of manufacturing the beam and method of manufacturing structure without column | |
| CN215564318U (en) | Rigid pull rod large-cantilever scaffold platform structure | |
| CN212376021U (en) | Steel corbel and support-free installation connecting node comprising same | |
| CN211286756U (en) | Temporary reinforcing device for structural beam | |
| CN220057647U (en) | Arch bridge outsourcing concrete bottom plate die block with construction channel | |
| CN218438564U (en) | Guide rail and removable torch pylon | |
| KR101250473B1 (en) | three-dimensional structure under tension system | |
| CN219602998U (en) | Elevator attachment stress conversion device | |
| CN109629398B (en) | External prestress reinforcing device of six-four type railway military beam | |
| CN101012694A (en) | Concrete beam with built-in transverse prestressed reinforcing steel bar | |
| CN216304400U (en) | Reinforcing structure at cable fastening saddle of assembled universal rod tower | |
| CN203373662U (en) | Combined type steel strand limiting device | |
| CN217840924U (en) | Multi-component prestress tensioning device | |
| CN220318368U (en) | Guide beam structure | |
| CN203411899U (en) | Bolt type steel strand limiting device | |
| CN217352087U (en) | Anti-overturning box girder | |
| CN217398305U (en) | Tower crane who takes root temporarily on boiler steel construction adheres to roof beam | |
| CN218713983U (en) | Novel all-bolt square column connecting piece and connecting structure | |
| CN213806534U (en) | Adjustable scaffold | |
| CN211080961U (en) | Telescopic adjustable core section of thick bamboo regularization protection work platform | |
| CN114277662B (en) | Steel-concrete composite beam cable-stayed bridge | |
| CN219931619U (en) | Transverse back edge and formwork support system of building construction formwork |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |