CN209958229U - External prestressing device for improving span of temporary support of Bailey beam - Google Patents
External prestressing device for improving span of temporary support of Bailey beam Download PDFInfo
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- CN209958229U CN209958229U CN201920682777.9U CN201920682777U CN209958229U CN 209958229 U CN209958229 U CN 209958229U CN 201920682777 U CN201920682777 U CN 201920682777U CN 209958229 U CN209958229 U CN 209958229U
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- portal
- span
- steering member
- bailey
- temporary support
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- 238000004873 anchoring Methods 0.000 claims description 26
- 229910000831 Steel Inorganic materials 0.000 claims description 21
- 239000010959 steel Substances 0.000 claims description 21
- 238000005452 bending Methods 0.000 claims description 10
- 238000000338 in vitro Methods 0.000 claims description 8
- 230000000712 assembly Effects 0.000 claims description 6
- 238000000429 assembly Methods 0.000 claims description 6
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model discloses an external prestressing force device for improving interim support span of bailey roof beam, including the bailey roof beam group that is used for strideing across navigation river course or existing road, still include external prestressed cable, the below of bailey roof beam group is provided with supporting component all around respectively, installs longitudinal extension's bottom end rail in the middle of the lower extreme of bailey roof beam group, and the bottom end rail steering member is installed to both ends lower part around the bottom end rail, install the portal subassembly on the supporting component, portal crossbeam steering member is installed at portal subassembly top, install the jack under the supporting component corresponds portal crossbeam steering member, external prestressed cable wears to establish in the bottom end rail steering member, and portal crossbeam steering member is walked around respectively and is linked firmly with the flexible end anchor of jack that corresponds to both ends about external prestressed cable. The utility model discloses structural arrangement is reasonable, has improved the span of bei lei beam support by a wide margin, can effectively guarantee bei lei beam support below navigation and traffic safety, has enlarged the range of application of support method construction.
Description
Technical Field
The utility model relates to a concrete arch bridge portion of a bridge structure support method construction technical field specifically is an external prestressing force device for improving bailey beam temporary stand span.
Background
The construction of the steel pipe concrete arch bridge beam part structure generally adopts a support method. When a bridge spans a navigation river channel or an existing road, in order to ensure the navigation capacity of the river channel or road traffic, the support is generally designed as a Bailey beam support. However, when the navigation hole is required to be wider or the road surface is wider and the traffic is busy, if the span of the conventional bailey beam support is too large, the midspan downward deflection of the support becomes too large, and the linear requirement of the beam part structure cannot be met. Under the linear requirement of roof beam portion structure, the construction of support method will not implement, perhaps risks greatly safely, sacrifices the current demand of channel or road, reduces the span of beiLei beam support. Therefore, the advantages of convenience, rapidness, high efficiency and low cost of the construction of the support method cannot be exerted.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an external prestressing force device for improving interim support span of bailey roof beam to solve the problem that provides among the above-mentioned background art. The span of the Bailey beam support can be greatly improved, and the navigation and traffic safety width below the support can be ensured.
In order to achieve the above object, the utility model provides a following technical scheme:
the utility model provides an external prestressing force device for improving interim support span of bailey beam, is including being used for strideing across the bailey beam group of navigation river course or existing road, still includes external prestressing cable, be provided with supporting component around the below of bailey beam group respectively, install longitudinal extension's bottom end rail in the middle of the lower extreme of bailey beam group, bottom end rail steering member is installed to both ends lower part around the bottom end rail, install the portal subassembly on the supporting component, portal crossbeam steering member is installed at portal subassembly top, the supporting component corresponds and installs the jack under the portal crossbeam steering member, external prestressing cable is worn to establish in the bottom end rail steering member, and portal crossbeam steering member is walked around respectively and is linked firmly with the flexible end anchor of jack that corresponds to both ends about external prestressing cable.
As a further aspect of the present invention: the supporting assembly comprises a transverse anchoring beam and a group of foundation steel pipe piles for supporting the transverse anchoring beam, a plurality of longitudinal anchoring beams are fixed between the transverse anchoring beam at the front end and the transverse anchoring beam at the rear end, and the left side and the right side of the lower end of the Bailey beam group are respectively anchored on the corresponding longitudinal anchoring beams.
As a further aspect of the present invention: the portal assembly comprises a pair of portal columns fixed on the transverse anchoring beam and supporting brackets arranged obliquely, longitudinally extending portal beams are fixed to the tops of the two portal columns, the left side and the right side of the top of each portal column are respectively fixed with the supporting brackets, the lower ends of the supporting brackets are fixed on the transverse anchoring beam, stay ropes are arranged in the middles of the portal beams and are perforated, portal beam steering pieces are fixed beside the stay ropes, and the jacks are arranged under the stay ropes.
As a further aspect of the present invention: the top of each portal frame column is fixed with a wind cable rope, and the other end of the wind cable rope is anchored on a concrete foundation of a bridge bearing platform or a river bank.
As a further aspect of the present invention: a group of omega-shaped mounting assemblies are longitudinally distributed and welded in the middle of the lower ends of the Bailey beam group, and the lower cross beam penetrates through the omega-shaped mounting assemblies.
As a further aspect of the present invention: the omega-shaped mounting assembly is composed of a plurality of omega-shaped single components, and the omega-shaped single components are formed by bending and processing reinforcing steel bars.
As a further aspect of the present invention: the lower cross beam comprises a pair of I-shaped steels, cover plates are respectively welded and fixed on the upper end surfaces and the lower end surfaces of the two I-shaped steels, and the length of the lower cross beam is longer than the width of the Bailey beam group; the lower beam steering piece is formed by bending and processing a seamless steel pipe.
As a further aspect of the present invention: the portal frame column is made of steel pipes, the structure of the portal frame cross beam is the same as that of the lower cross beam, a stay cable through hole is reserved in the middle of a cover plate of the portal frame cross beam, and the portal frame cross beam steering piece is formed by bending seamless steel pipes.
Compared with the prior art, the beneficial effects of the utility model are that: compared with the traditional Bailey beam support, the external prestress device is adopted, so that the span of the Bailey beam support is greatly increased, navigation and traffic safety below the Bailey beam support can be effectively guaranteed, and the application range of support method construction is expanded.
Drawings
Fig. 1 is a schematic elevation structure of an external prestressing device for increasing the span of a temporary support of a bailey beam;
fig. 2 is a schematic top view of an external prestressing device for increasing the span of a temporary support for a beret beam;
FIG. 3 is a schematic structural diagram of a section A-A in an in vitro prestressing device for increasing the span of a temporary support of a Bailey beam;
FIG. 4 is a side view of the door frame assembly of the external prestressing device for increasing the span of the temporary support of the Bailey beam;
FIG. 5 is a schematic top view of a door frame assembly of an external prestressing apparatus for increasing the span of a temporary support for a Bailey beam;
fig. 6 is a schematic structural diagram of a lower cross beam in an external prestressing device for increasing the span of a temporary support of a bailey beam.
In the figure: the method comprises the following steps of 1-Bailey beam group, 2-omega-shaped mounting assembly, 3-lower cross beam, 4-foundation steel pipe pile, 5-transverse anchoring beam, 6-portal column, 7-external prestressed cable, 8-concrete foundation, 9-longitudinal anchoring beam, 10-cover plate, 11-I-steel, 12-stay cable through hole, 301-lower cross beam steering block, 601-supporting bracket, 602-portal cross beam, 603-portal cross beam steering piece, 604-jack and 605-wind cable.
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.
Referring to fig. 1 to 6, the present invention provides a technical solution: the utility model provides an external prestressing force device for improving interim support span of bailey beam, is including being used for strideing across the bailey beam group 1 of navigation river course or existing road, still includes external prestressing cable 7, be provided with supporting component around the below of bailey beam group 1 respectively, install longitudinal extension's bottom end rail 3 in the middle of the lower extreme of bailey beam group 1, bottom end rail steering member 301 is installed to both ends lower part around bottom end rail 3, install the portal subassembly on the supporting component, portal crossbeam steering member 603 is installed at portal subassembly top, supporting component corresponds portal crossbeam steering member 603 and installs jack 604 under, external prestressing cable 7 wears to establish in bottom end rail steering member 301, and portal crossbeam steering member 603 is walked around respectively and is connected with the flexible end anchor of jack 604 that corresponds to both ends about external prestressing cable 7.
During construction, the tension of the external prestressed cable 7 is adjusted by the jack 604, so that the downwarping of the bailey beam group 1 is controlled.
The supporting assembly comprises a transverse anchoring beam 5 and a group of foundation steel pipe piles 4 for supporting the transverse anchoring beam 5, a plurality of longitudinal anchoring beams 9 are fixed between the transverse anchoring beam 5 at the front end and the transverse anchoring beam 5 at the rear end, and the left side and the right side of the lower end of the Bailey beam group 1 are respectively anchored on the corresponding longitudinal anchoring beams 9.
The portal assembly comprises a pair of portal columns 6 fixed on the transverse anchoring beam 5 and supporting brackets 601 obliquely arranged, longitudinally extending portal beams 602 are fixed at the tops of the two portal columns 6, the supporting brackets 601 are fixed on the left side and the right side of the top of each portal column 6, the lower ends of the supporting brackets 601 are fixed on the transverse anchoring beam 5, stay cable through holes 12 are formed in the middles of the portal beams 602, portal beam steering pieces 603 are fixed beside the stay cable through holes 12, and the jacks 604 are arranged under the stay cable through holes 12.
The top of each portal frame column 6 is fixed with a wind cable rope 605, and the other end of the wind cable rope 605 is anchored on a concrete foundation 8 of a bridge bearing platform or a river bank. The lateral stability of the door frame post 6 is ensured by the wind cables 605.
Preferably, a group of omega-shaped mounting assemblies 2 are longitudinally distributed and welded in the middle of the lower end of the Bailey beam group 1, and the lower cross beam 3 penetrates through the omega-shaped mounting assemblies 2.
The omega-shaped mounting component 2 is composed of a plurality of omega-shaped single components which are formed by bending and processing reinforcing steel bars. The omega-shaped mounting component 2 is used for safely and conveniently suspending the lower cross beam 3.
Preferably, referring to fig. 6, the lower cross beam 3 includes a pair of i-beams 11, the upper end surfaces and the lower end surfaces of the two i-beams 11 are respectively welded and fixed with a cover plate 10, and the length of the lower cross beam 3 is longer than the width of the bailey beam group 1; the lower beam steering member 301 is formed by bending a seamless steel pipe.
Preferably, the gantry column 6 is made of a steel pipe, the structure of the gantry beam 602 is the same as that of the lower beam 3, a cable through hole 12 is reserved in the middle of the cover plate 10 of the gantry beam 602, and the gantry beam steering part 603 is formed by bending and processing a seamless steel pipe.
The utility model discloses a construction process flow is: and (2) penetrating the prefabricated lower cross beam 3 through the pre-processed omega-shaped mounting component 2, binding and fixing, lifting to the midspan bottom of the Bailey beam group 1 by using floating crane equipment, and firmly welding the omega-shaped mounting component 2 and the Bailey beam group 1, wherein the lower cross beam 3 can be suspended below the Bailey beam group 1. A transverse anchoring beam 5 is additionally arranged on the foundation steel pipe piles 4 at two ends of the Bailey beam group 1, portal columns 6 are erected on the transverse anchoring beam 5, the two sides of each portal column 6 keep stability by utilizing supporting brackets 602, and portal beams 602 are arranged above the two portal columns 6. The seamless steel tube is bent to a certain radian to manufacture a lower beam steering block 301 and a portal beam steering block 603, the lower beam steering block 301 is firmly welded at two ends of the lower beam 3, and the portal beam steering block 603 is firmly welded on the portal beam 602. The external prestressed cable 7 penetrates through the lower crossbeam steering block 301, is anchored at the telescopic end of a jack 604 through a portal crossbeam steering block 603, the tension force is adjusted by the jack 604, and the transverse stability of the portal column 6 is anchored on a concrete foundation 8 of a bridge bearing platform or a river bank by an air cable 605. And finally, finishing the installation of the external prestress device for improving the span of the temporary support of the Bailey beam.
After the external prestressed device for increasing the span of the temporary support of the bailey beam is installed in place in the embodiment, the external prestressed cable 7 is pretensioned and tensioned. Accordingly, the load is normally applied to the Bailey beam group 1 according to the existing construction scheme. According to the downwarping condition of the Bailey beam group 1, the tension force is adjusted at any time by using the jack 604, so that the downwarping of the Bailey beam group 1 is controlled within a required range. After the construction is finished, the temporary load on the bailey beam group 1 is unloaded, and then the tension force of the external prestressing device is unloaded by using the jack 604, so that the dismantling can be finished.
Wherein, the control equation for adjusting the tension force is as follows:
wherein:
w is the adjustment target deflection; f is the tensile force of the external prestressed cable 7, and L is the span of the Bailey beam group 1 in the figure 1; h is the height of the gantry column 6 in FIG. 1; EI is the bending stiffness of beret beam set 1 (specifically, table 1 can be looked up).
TABLE 1 geometric characteristics table of Bailey beam set
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. An external prestressing force device for improving the span of a temporary support of a Bailey beam comprises a Bailey beam group (1) for crossing a navigation river channel or an existing road, and is characterized in that: still include external prestressed cable (7), be provided with supporting component around the below of bailey beam group (1) respectively, install longitudinal extension's bottom end rail (3) in the middle of the lower extreme of bailey beam group (1), bottom end rail steering member (301) are installed to the front and back both ends lower part of bottom end rail (3), install the portal subassembly on the supporting component, portal crossbeam steering member (603) are installed at portal subassembly top, supporting component corresponds portal crossbeam steering member (603) and installs jack (604) under, external prestressed cable (7) are worn to establish in bottom end rail steering member (301), and portal crossbeam steering member (603) and the flexible end anchor connection of jack (604) with corresponding are walked around respectively to the both ends about external prestressed cable (7).
2. The in vitro prestressing device for increasing the span of a temporary support for a beret beam according to claim 1, wherein: the supporting assembly comprises a transverse anchoring beam (5) and a group of foundation steel pipe piles (4) used for supporting the transverse anchoring beam (5), a plurality of longitudinal anchoring beams (9) are fixed between the transverse anchoring beam (5) at the front end and the transverse anchoring beam (5) at the rear end, and the left side and the right side of the lower end of the Bailey beam group (1) are respectively anchored on the corresponding longitudinal anchoring beams (9).
3. The in vitro prestressing device for increasing the span of a temporary support for a beret beam according to claim 2, wherein: portal subassembly includes a pair of portal post (6) of fixing on horizontal anchor roof beam (5) and support bracket (601) that the slope was arranged, two portal post (6) tops are fixed with longitudinal extension's portal crossbeam (602), every portal post (6) top left and right sides all is fixed with support bracket (601), the lower extreme of supporting bracket (601) is fixed on horizontal anchor roof beam (5), the centre of portal crossbeam (602) has been seted up the cable and has been perforated (12), the next door of cable perforation (12) is fixed with portal crossbeam steering member (603), jack (604) are arranged under cable perforation (12).
4. The in vitro prestressing apparatus for increasing the span of a temporary support for a beret beam according to claim 3, wherein: the top of each portal frame column (6) is fixed with a wind cable rope (605), and the other end of the wind cable rope (605) is anchored on a concrete foundation (8) of a bridge bearing platform or a river bank.
5. The in vitro prestressing device for increasing the span of a temporary support for a beret beam according to claim 1, wherein: a group of omega-shaped mounting assemblies (2) are longitudinally distributed and welded in the middle of the lower end of the Bailey beam group (1), and the lower cross beam (3) penetrates through the omega-shaped mounting assemblies (2).
6. The in vitro prestressing apparatus for increasing the span of a temporary support for a bailey beam according to claim 5, wherein: the omega-shaped mounting assembly (2) is composed of a plurality of omega-shaped single components, and the omega-shaped single components are formed by bending and processing reinforcing steel bars.
7. The in vitro prestressing apparatus for increasing the span of a temporary support for a beret beam according to claim 3, wherein: the lower cross beam (3) comprises a pair of I-shaped steels (11), the upper end surfaces and the lower end surfaces of the two I-shaped steels (11) are respectively fixedly welded with a cover plate (10), and the length of the lower cross beam (3) is longer than the width of the Bailey beam group (1); the lower beam steering piece (301) is formed by bending and processing a seamless steel pipe.
8. The in vitro prestressing apparatus for increasing the span of a temporary support for a beret beam according to claim 7, wherein: the portal frame column (6) is made of steel pipes, the structure of the portal frame cross beam (602) is the same as that of the lower cross beam (3), a stay cable through hole (12) is reserved in the middle of a cover plate (10) of the portal frame cross beam (602), and the portal frame cross beam steering piece (603) is formed by bending seamless steel pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920682777.9U CN209958229U (en) | 2019-05-13 | 2019-05-13 | External prestressing device for improving span of temporary support of Bailey beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920682777.9U CN209958229U (en) | 2019-05-13 | 2019-05-13 | External prestressing device for improving span of temporary support of Bailey beam |
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| Publication Number | Publication Date |
|---|---|
| CN209958229U true CN209958229U (en) | 2020-01-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920682777.9U Withdrawn - After Issue CN209958229U (en) | 2019-05-13 | 2019-05-13 | External prestressing device for improving span of temporary support of Bailey beam |
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| CN (1) | CN209958229U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109972531A (en) * | 2019-05-13 | 2019-07-05 | 中铁二十四局集团安徽工程有限公司 | It is a kind of for improving the external prestressing device of Bailey beam falsework span |
| CN109972531B (en) * | 2019-05-13 | 2024-04-23 | 中铁二十四局集团安徽工程有限公司 | External prestressing device for improving temporary support span of bailey beam |
-
2019
- 2019-05-13 CN CN201920682777.9U patent/CN209958229U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109972531A (en) * | 2019-05-13 | 2019-07-05 | 中铁二十四局集团安徽工程有限公司 | It is a kind of for improving the external prestressing device of Bailey beam falsework span |
| CN109972531B (en) * | 2019-05-13 | 2024-04-23 | 中铁二十四局集团安徽工程有限公司 | External prestressing device for improving temporary support span of bailey beam |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20200117 Effective date of abandoning: 20240423 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200117 Effective date of abandoning: 20240423 |