CN209779464U - Box girder cantilever section installation device - Google Patents
Box girder cantilever section installation device Download PDFInfo
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- CN209779464U CN209779464U CN201920350526.0U CN201920350526U CN209779464U CN 209779464 U CN209779464 U CN 209779464U CN 201920350526 U CN201920350526 U CN 201920350526U CN 209779464 U CN209779464 U CN 209779464U
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- box girder
- pull rod
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- rod seat
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Abstract
The utility model discloses a case roof beam cantilever section installation device, including letter support and pull rod seat, the bottom plate of letter support and case roof beam cantilever section links to each other, in order to carry on spacingly in vertical direction to the cantilever section, and the pull rod seat includes first pull rod seat and the second pull rod seat that links to each other with the roof of case roof beam cantilever section and canned paragraph respectively, is equipped with the regulation portion that is used for adjusting roof beam cantilever section and canned paragraph roof interval between first pull rod seat and second pull rod seat. In the use process, the bottom plate of the cantilever section of the box girder is in lap joint with the bottom plate of the fixed section through the simply-supported support, the first pull rod seat and the second pull rod seat are connected with the top plates of the simply-supported support and the fixed section through the adjusting part, and meanwhile, the distance between the two top plates is changed through the adjusting part, so that the fixed section and the cantilever section of the box girder can be well aligned. In addition, the construction amount of the connection of the simply supported support and the pull rod seat with the box girder is obviously less than that of the temporary tower shrinkage.
Description
Technical Field
The utility model relates to a construction equipment technical field, in particular to case roof beam cantilever section installation device.
Background
In the bridge construction process, the box girder is prefabricated firstly usually, and then the box girder is installed on a pier to complete the construction of the bridge. The construction mode of the prefabricated box girder can improve the construction efficiency and shorten the construction period, and is a main mode of bridge construction at present.
The box girders are required to be hoisted and aligned in the installation process and then connected, in the prior art, the box girders are generally aligned in two ways, firstly, installation and adjustment are carried out through a temporary tower shrinkage, and secondly, the vertical curve of the cantilever section is accurately adjusted by using a chain block, so that the former has large construction amount, complex working procedures and lower construction efficiency; the latter uses the chain block method to adjust and is not suitable for the installation of large-tonnage cantilever sections, the adjustment precision is low (the floating crane operation in water is influenced by tide and horizontal plane fluctuation, the onshore hoisting is influenced by the crane performance such as motor inner inclined leakage, and the installation precision is influenced), and larger potential safety hazard exists.
Therefore, how to ensure the installation accuracy of the box girder and reduce the construction amount is a technical problem which needs to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a case roof beam cantilever section installation device, it can be adjusted the case roof beam well through simple support and pull rod seat, has guaranteed the installation accuracy, has reduced the construction volume simultaneously.
In order to achieve the above object, the utility model provides a case roof beam cantilever section installation device, including simple support and pull rod seat, simple support links to each other with the bottom plate of case roof beam cantilever section, in order to carry on spacingly at vertical direction to the cantilever section, the pull rod seat includes first pull rod seat and the second pull rod seat that links to each other with the roof of case roof beam cantilever section and canned paragraph respectively, first pull rod seat with be equipped with the regulation portion that is used for adjusting roof beam cantilever section and canned paragraph roof interval between the second pull rod seat.
Preferably, the simple support comprises an L-shaped simple support and a rectangular simple support, the L-shaped simple support comprises a vertical section and a horizontal section, the lower end of the vertical section is connected with the bottom plate of the box girder cantilever section, the horizontal section is located at the upper end of the vertical section and is suspended outside the end face of the box girder cantilever section, the rectangular simple support is connected with the bottom plate of the box girder fixing section, and the height of the vertical section is equal to the height of the rectangular simple support.
Preferably, the pull rod seat comprises a top plate perpendicular to the cantilever section of the box girder and a connecting plate parallel to the end face of the box girder, the connecting plate is provided with a plurality of through holes penetrating along the thickness direction, and the adjusting part is a pull rod matched with the through holes.
Preferably, the pull rod seat further comprises a plurality of rib plates, two side edges of each rib plate are respectively connected with the connecting plate and the top plate of the cantilever section of the box girder, and the rib plates are arranged along the length direction of the connecting plate.
Preferably, one rib plate is arranged between two adjacent via holes.
Preferably, the number of the simply supported supports is two, and the simply supported supports are symmetrically distributed at symmetrical positions on the upper end face of the bottom plate of the cantilever section of the box girder.
Preferably, the number of the first pull rod seats and the number of the second pull rod seats are two, and the two pull rod seats are symmetrically distributed at symmetrical positions on the upper end face of the top plate of the cantilever section of the box girder.
Preferably, the simply supported support is provided with a reinforcing rib which is connected with the bottom plate of the box girder where the simply supported support is located so as to improve the supporting strength, and the reinforcing rib is parallel to the end face of the box girder where the simply supported support is located.
The utility model provides a box girder cantilever section installation device includes simple support and pull rod seat, and simple support links to each other with the bottom plate of box girder cantilever section, and the pull rod seat is including first pull rod seat and second pull rod seat respectively, and the two links to each other with the roof of box girder cantilever section and canned paragraph respectively.
In the use process, the bottom plate of the cantilever section of the box girder is in lap joint with the bottom plate of the fixed section through the simply-supported support, the first pull rod seat and the second pull rod seat are connected with the top plates of the simply-supported support and the fixed section through the adjusting part, the distance between the two top plates is changed through the adjusting part, the fixed section and the cantilever section of the box girder can be well aligned, and meanwhile, the construction amount of the simply-supported support and the pull rod seat connected with the box girder is obviously smaller than the construction amount required by temporary tower shrinkage.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural view of a box girder cantilever section installation device provided by the present invention in cooperation with a box girder;
FIG. 2 is a schematic view of the lever base;
fig. 3 is a schematic structural diagram of a simple support.
Wherein the reference numerals in fig. 1 to 3 are:
The pull rod seat comprises a pull rod seat 1, an L-shaped simple support seat 2, a rectangular simple support seat 3, a pull rod 4, a fixed section 5, a cantilever section 6, a connecting plate 11, a through hole 12, a rib plate 13, a vertical section 21 and a horizontal section 22.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In order to make the technical field of the present invention better understand, the present invention will be described in detail with reference to the accompanying drawings and the detailed description.
Referring to fig. 1 to 3, fig. 1 is a schematic structural view of a box girder cantilever section installation device provided by the present invention in cooperation with a box girder; FIG. 2 is a schematic view of the lever base; fig. 3 is a schematic structural diagram of a simple support.
The utility model provides a case roof beam cantilever section installation device, its overall structure can refer to figure 1, including simple support and pull rod seat 1, simple support links to each other with the bottom plate of case roof beam cantilever section 6, and pull rod seat 1 is including first pull rod seat and second pull rod seat respectively, and the two links to each other with the roof of case roof beam cantilever section 6 and canned paragraph 5 respectively, is equipped with regulating part between first pull rod seat and second pull rod seat, and the both ends of regulating part link to each other with first pull rod seat and second pull rod seat respectively, can adjust the interval of roof beam cantilever section 6 and canned paragraph 5 roof through regulating part.
In the installation process, the simply supported support is connected with the bottom plate of the box girder, and the first pull rod seat and the second pull rod seat are respectively connected with the top plates of the cantilever section 6 and the fixed section 5 of the box girder. Then the cantilever section 6 of the box girder is hoisted by hoisting equipment and is approximately aligned with the fixed section 5, and the box girder is just overlapped with the bottom plate of the fixed section 5 by the simple support. After the lap joint is finished, the bottom plate of the cantilever section 6 and the bottom plate of the fixed section 5 are attached to each other, and the limiting of the cantilever section 6 in the vertical direction is realized. The horizontal position of the cantilever section 6 is adjusted to align the first pull rod seat and the second pull rod seat. At this time, the cantilever section 6 and the fixed section 5 are aligned in the vertical direction and the horizontal direction, but the accuracy of the numerical curve of the cantilever section 6 still needs to be adjusted, that is, the axis of the cantilever section 6 and the axis of the fixed section 5 are not overlapped yet. And the adjusting part is used for connecting the first pull rod seat and the second pull rod seat, the distance between the first pull rod seat and the second pull rod seat is adjusted through the adjusting part, so that the included angle between the cantilever section 6 and the horizontal direction is changed, the elevation of the vertical curve of the cantilever section 6 is adjusted in a micro-way, and finally the accuracy adjustment of the installation of the cantilever section 6 of the bridge is realized. The adjusting part can be a pull rod 4, a hydraulic cylinder and other mechanisms positioned between the first pull rod seat and the second pull rod seat, and the length change of the adjusting part can achieve the purpose of adjusting the distance between the cantilever section 6 and the fixed section 5.
In this embodiment, the box girder cantilever section installation device completes the alignment of the cantilever section 6 in the vertical direction through the simply supported support, completes the alignment of the cantilever section 6 in the horizontal direction through the pull rod base 1, and then completes the accurate adjustment of the vertical curve of the cantilever section 6 by adjusting the included angle between the cantilever section 6 and the horizontal direction through the adjusting part. The box girder cantilever section installation device is simple in structure, the alignment process is convenient, and the construction amount of engineering is reduced on the basis of ensuring the alignment precision.
Alternatively, the simple support includes an L-shaped simple support and a rectangular simple support 3, which are connected to the bottom plates of the cantilever section 6 and the fixed section 5, respectively, as shown in fig. 1 and 3, and the L-shaped simple support 2 may be lapped on the upper surface of the rectangular simple support 3. Specifically, the L-shaped support 2 includes a vertical section 21 and a horizontal section 22, the lower end of the vertical section 21 is connected to the bottom plate of the cantilever section 6 of the box girder, one end of the horizontal section 22 is connected to the upper end of the vertical section 21, and the other end extends toward the fixed section 5 and is suspended outside the end surface of the cantilever section 6 of the box girder. When the box girder is installed, the horizontal section 22 of the L-shaped simple support seat 2 is lapped on the upper end surface of the rectangular simple support seat 3, obviously, the height of the vertical section 21 of the L-shaped simple support seat 2 is equal to that of the rectangular simple support seat 3, and when the lapping is completed, the bottom plate of the cantilever section 6 and the bottom plate of the fixed section 5 can be just aligned in the vertical direction.
Specifically, the L-shaped simple support and the rectangular simple support 3 are both of plate-shell type structures and are formed by welding steel plates, the thicknesses of a top plate and a bottom plate of the L-shaped simple support and the rectangular simple support are 20mm, the thickness of a web plate of the L-shaped simple support and the rectangular simple support are 18mm, and Q235qD steel plates are selected as materials.
Optionally, the letter support is two, L type letter support 2 and rectangle letter support 3 are two promptly, an L type letter support 2 and a rectangle letter support 3 constitute a set of letter support, two sets of letter supports symmetric distribution are in the position of box girder cantilever section 6's bottom plate up end symmetry, as shown in fig. 1, two sets of letter supports are equal with the lateral wall interval of its place one side, the two can make 6 bottom plates of cantilever section atress more even when the overlap joint, avoid the bottom plate to take place to damage because of local stress is too big. Preferably, the two simply supported supports are located at 1/3 and 2/3 of the width of the base plate, respectively.
Furthermore, the simple support is also provided with a reinforcing rib, the reinforcing rib is connected with the box girder bottom plate where the simple support is located and is connected with the box girder bottom plate, and stress generated in the installation process is dispersed to the bottom plate of the box girder through the reinforcing rib, so that stress concentration is avoided. Of course, the user can also adopt simple support seats with other shapes according to the needs, for example, the cross section of the trapezoidal simple support seat is isosceles trapezoid through the matching of the L-shaped simple support seat and the trapezoidal simple support seat, and the purpose of dispersing stress can also be achieved.
In this embodiment, the letter support includes L type letter support 2 and rectangle letter support 3, and the two is the lamella structure, and the stress that its can bear is bigger, can avoid stress direct action to case roof beam bottom plate, and the protection bottom plate is not damaged.
Optionally, the pull rod seat 1 includes a connecting plate 11, the connecting plate 11 has a plurality of through holes 12 penetrating along a thickness direction, the through holes 12 are uniformly distributed along a length direction of the connecting plate 11, as shown in fig. 2, 4 through holes 12 are provided on the connecting plate 11. The adjusting part is a pull rod 4 with 10.9 grades and a diameter of 32mm, and both ends of the pull rod 4 are provided with external threads. After the pull rod seat 1 is installed, the connecting plate 11 is perpendicular to the top plate of the cantilever section 6 of the box girder and is parallel to the end face of the box girder where the box girder is located, the positions of the connecting plates 11 of the first pull rod seat and the second pull rod seat correspond to each other, the through holes 12 of the first pull rod seat and the second pull rod seat correspond to each other one by one, the pull rods 4 penetrate through the through holes 12 of the two connecting plates 11, and the two ends of each pull.
Optionally, in order to facilitate alignment of the pull rod seat 1, the mounting device for the cantilever section of the box girder further comprises a guide part, one end of the guide part is connected with the side walls on two sides of the fixed section 5 or the cantilever section 6 of the box girder, the other end of the guide part is suspended outside the box girder, the two guide parts are located at the same height, and the distance between the two guide parts is gradually reduced along the direction far away from the box girder. When the cantilever section 6 is installed, the cavity is approximately aligned with the fixed section 5, and as the distance between the cantilever section 6 and the fixed section 5 is gradually reduced, the guide part can guide the cantilever section 6 to be gradually aligned with the two sides of the fixed section 5, and the two sides are aligned, so that the connecting plates 11 of the first pull rod seat and the second pull rod seat can be aligned.
Optionally, the number of the first pull rod seats and the number of the second pull rod seats are two, and the two pull rod seats are symmetrically distributed at symmetrical positions on the upper end face of the top plate of the cantilever section 6 of the box girder, and preferably, the two groups of pull rod seats 1 are respectively located at 1/3 and 2/3 of the width of the upper end face of the top plate.
the pull rod seat 1 needs to bear larger tensile stress in the use process, in order to avoid the stress deformation of the connecting plate 11, the pull rod seat 1 further comprises a plurality of rib plates 13, the rib plates 13 can be in the shapes of a rectangle, a right triangle and the like, two right-angle sides of the rib plates are respectively connected with the connecting plate 11 and a top plate of a box girder, and the plurality of rib plates 13 are arranged along the length direction of the connecting plate 11 to fulfill the aim of strengthening the stress strength of the connecting plate 11. Preferably, a rib plate 13 is arranged between two adjacent via holes 12, and two ends of the connecting plate 11 are respectively provided with a rib plate 13. The connecting plate 11 and the rib plate 13 can be Q345 steel plates with the thickness of 20 mm.
In this embodiment, the connection strength between the pull rod seat 1 and the box girder top plate is strengthened through the rib plate 13, and meanwhile, the stress strength of the connecting plate 11 is improved, so that the deformation of the pull rod seat 1 due to overlarge stress is avoided. Meanwhile, a plurality of through holes 12 are formed in the connecting plate 11, each through hole 12 can be provided with one pull rod 4, the load on each pull rod 4 can be reduced by increasing the number of the pull rods 4, and the pull rods 4 are prevented from being broken.
It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.
It is right above the utility model provides a box girder cantilever section installation device has carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (8)
1. The utility model provides a case roof beam cantilever section installation device, its characterized in that, includes simple support and pull rod seat (1), simple support links to each other with the bottom plate of case roof beam cantilever section (6), in order to carry on spacingly in vertical direction to cantilever section (6), pull rod seat (1) is including the first pull rod seat and the second pull rod seat that link to each other with the roof of case roof beam cantilever section (6) and canned paragraph (5) respectively, first pull rod seat with be equipped with the regulation portion that is used for adjusting roof beam cantilever section (6) and canned paragraph (5) roof interval between the second pull rod seat.
2. The box girder cantilever segment installation device according to claim 1, wherein the simple support comprises an L-shaped simple support (2) and a rectangular simple support (3), the L-shaped simple support (2) comprises a vertical section (21) and a horizontal section (22), the lower end of the vertical section (21) is connected with the bottom plate of the box girder cantilever segment (6), the horizontal section (22) is positioned at the upper end of the vertical section (21) and is suspended outside the end surface of the box girder cantilever segment (6), the rectangular simple support (3) is connected with the bottom plate of the box girder fixing segment (5), and the height of the vertical section (21) is equal to the height of the rectangular simple support (3).
3. The box girder cantilever section installation device according to claim 2, wherein, the draw bar seat (1) includes a connecting plate (11) perpendicular to the top plate of the box girder cantilever section (6) and parallel to the box girder end surface where the box girder cantilever section is located, the connecting plate (11) is provided with a plurality of through holes (12) penetrating along the thickness direction, and the adjusting part is a draw bar (4) matched with the through holes (12).
4. The box girder cantilever section installation device according to claim 3, wherein the pull rod seat (1) further comprises a plurality of rib plates (13) of which the side edges are respectively connected with the connecting plate (11) and the top plate of the box girder cantilever section (6), and the rib plates (13) are arranged along the length direction of the connecting plate (11).
5. The box girder cantilever segment mounting device according to claim 4, wherein, a piece of the rib plate (13) is arranged between two adjacent via holes (12).
6. The box girder cantilever section installation device of any one of claims 1 to 5, wherein, the number of the simply supported supports is two, and the simply supported supports are symmetrically distributed at the symmetrical positions of the upper end surface of the bottom plate of the box girder cantilever section (6).
7. The box girder cantilever section installation device of claim 6, wherein, the first draw bar seat and the second draw bar seat are both two and symmetrically distributed at the symmetrical position of the upper end surface of the top plate of the box girder cantilever section (6).
8. The cantilever section installation device for box girder according to any one of claims 1 to 5, wherein the simply supported support is provided with a reinforcing rib connected with the bottom plate of the box girder on which the simply supported support is arranged so as to improve the supporting strength, and the reinforcing rib is parallel to the end surface of the box girder on which the simply supported support is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920350526.0U CN209779464U (en) | 2019-03-19 | 2019-03-19 | Box girder cantilever section installation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920350526.0U CN209779464U (en) | 2019-03-19 | 2019-03-19 | Box girder cantilever section installation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209779464U true CN209779464U (en) | 2019-12-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920350526.0U Active CN209779464U (en) | 2019-03-19 | 2019-03-19 | Box girder cantilever section installation device |
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| Country | Link |
|---|---|
| CN (1) | CN209779464U (en) |
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2019
- 2019-03-19 CN CN201920350526.0U patent/CN209779464U/en active Active
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