CN109972531B - An external prestressing device for increasing the span of a temporary Bailey beam support - Google Patents
An external prestressing device for increasing the span of a temporary Bailey beam support Download PDFInfo
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- CN109972531B CN109972531B CN201910393460.8A CN201910393460A CN109972531B CN 109972531 B CN109972531 B CN 109972531B CN 201910393460 A CN201910393460 A CN 201910393460A CN 109972531 B CN109972531 B CN 109972531B
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- portal
- bailey
- span
- bailey beam
- steering member
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D4/00—Arch-type bridges
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
本发明公开了一种用于提高贝雷梁临时支架跨度的体外预应力装置，包括用于跨越通航河道或既有道路的贝雷梁组，还包括体外预应力索，所述贝雷梁组的下方四周分别设置有支撑组件，贝雷梁组的下端中间安装有纵向延伸的下横梁，下横梁的前后两端下部安装有下横梁转向件，所述支撑组件上安装有门架组件，门架组件顶部安装有门架横梁转向件，所述支撑组件对应门架横梁转向件正下方安装有千斤顶，所述体外预应力索穿设在下横梁转向件内，体外预应力索的左右两端分别绕过门架横梁转向件并与对应的千斤顶伸缩端锚固连接。本发明结构布置合理，大幅提高了贝雷梁支架的跨径，能有效保证贝雷梁支架下方通航及交通安全，扩大了支架法施工的应用范围。
The present invention discloses an external prestressing device for improving the span of a temporary support of a Bailey beam, comprising a Bailey beam group for crossing a navigable river or an existing road, and an external prestressing cable, wherein support components are respectively arranged around the lower side of the Bailey beam group, a longitudinally extending lower crossbeam is installed in the middle of the lower end of the Bailey beam group, a lower crossbeam steering member is installed at the lower parts of the front and rear ends of the lower crossbeam, a portal frame component is installed on the support component, a portal frame crossbeam steering member is installed on the top of the portal frame component, a jack is installed directly below the portal frame crossbeam steering member of the support component, the external prestressing cable is passed through the lower crossbeam steering member, and the left and right ends of the external prestressing cable respectively bypass the portal frame crossbeam steering member and are anchored and connected with the corresponding telescopic end of the jack. The present invention has a reasonable structural arrangement, greatly improves the span of the Bailey beam support, can effectively ensure navigation and traffic safety below the Bailey beam support, and expands the application scope of the support method construction.
Description
Technical Field
The invention relates to the technical field of construction of a structural support method of a concrete arch bridge part, in particular to an in-vitro prestress device for improving the span of a temporary support of a bailey beam.
Background
The construction of the steel tube concrete arch bridge part structure generally adopts a bracket method. When a bridge spans a navigation river or an existing road, the bracket is generally designed as a bailey beam bracket in order to ensure the navigation capability of the river or road traffic. However, when the requirements of the navigable holes are wider or the existing road surface is wider and the traffic is heavier, if the span of the conventional bailey beam bracket is too large, the mid-span downwarping of the bracket becomes large, and the linear requirements of the beam part structure cannot be met. Under the linear requirement of the beam part structure, the bracket method construction can not be implemented, or the huge safety risk is raised, the requirements of the navigation channel or the road passing are sacrificed, and the span of the beret beam bracket is reduced. Therefore, the advantages of convenience, rapidness, high efficiency and low cost of the bracket method construction cannot be exerted.
Disclosure of Invention
The invention aims to provide an in-vitro pre-stressing device for improving the span of a temporary support of a bailey beam, so as to solve the problems in the prior art. The span of the Bailey beam support can be greatly improved, and the navigation and traffic safety width below the support are ensured.
In order to achieve the above purpose, the present invention provides the following technical solutions:
The utility model provides an external prestressing force device for improving bailey beam temporary support span, is including being used for crossing over the bailey beam group of navigation river course or existing road, still includes external prestressing force cable, be provided with supporting component around the below of bailey beam group respectively, install the lower beam of longitudinal extension in the middle of the lower extreme of bailey beam group, the lower beam steering member is installed to the front and back both ends lower part of lower beam, install the portal subassembly on the supporting component, portal beam steering member is installed at portal subassembly top, supporting component corresponds the portal beam steering member and installs the jack under, external prestressing force cable wears to establish in the lower beam steering member, and the left and right sides both ends of external prestressing force cable walk the portal beam respectively and turn to the piece and be connected with the flexible end anchor of jack that corresponds.
As a further scheme of the invention: the support 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 beret beam group are respectively anchored on the corresponding longitudinal anchoring beams.
As a further scheme of the invention: the portal assembly comprises a pair of portal posts fixed on the transverse anchoring beams and supporting brackets obliquely arranged, the tops of the two portal posts are fixedly provided with portal beams extending longitudinally, the left side and the right side of each portal post are fixedly provided with the supporting brackets, the lower ends of the supporting brackets are fixed on the transverse anchoring beams, the middle of each portal beam is provided with a guy rope perforation, the side of each guy rope perforation is fixedly provided with a portal beam steering piece, and the jack is arranged under each guy rope perforation.
As a further scheme of the invention: the top of each portal frame column is fixedly provided with a wind cable, and the other end of the wind cable is anchored on a concrete foundation of a bridge bearing platform or a river bank.
As a further scheme of the invention: a group of omega-shaped installation components are longitudinally welded in the middle of the lower end of the Bailey beam group, and the lower cross beam is arranged in the omega-shaped installation components in a penetrating mode.
As a further scheme of the 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 steel bars.
As a further scheme of the invention: the lower beam comprises a pair of I-beams, the upper end surfaces and the lower end surfaces of the two I-beams are respectively welded and fixed with a cover plate, and the length of the lower 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 tube.
As a further scheme of the invention: the portal frame column adopts steel pipes, the structure of a portal frame beam is the same as that of a lower beam, a guy cable perforation is reserved in the middle of a cover plate of the portal frame beam, and a portal frame beam steering piece is formed by bending and processing seamless steel pipes.
Compared with the prior art, the invention has the beneficial effects that: compared with the traditional bailey beam bracket, the external prestressing device is adopted, so that the span of the bailey beam bracket is greatly improved, the navigation and traffic safety below the bailey beam bracket can be effectively ensured, and the application range of the bracket construction is enlarged.
Drawings
FIG. 1 is a schematic elevational view of an in vitro prestressing device for increasing the span of a temporary support for a bailey beam;
FIG. 2 is a schematic top view of an in vitro prestressing device for increasing the span of a temporary support of a bailey beam;
FIG. 3 is a schematic view of the structure of section A-A of an in vitro prestressing device for increasing the span of a temporary support of a bailey beam;
FIG. 4 is a schematic diagram of a side view of a gantry assembly in an in vitro prestressing device for increasing the span of a temporary support of a bailey beam;
FIG. 5 is a schematic top view of a gantry assembly in an in vitro prestressing device for increasing the span of a temporary support for a bailey beam;
Fig. 6 is a schematic structural view of a lower cross beam in an external prestressing device for improving the span of a temporary support of a beret beam.
In the figure: the steel-reinforced concrete composite beam comprises a 1-bailey beam group, a 2-omega-shaped mounting assembly, a 3-lower beam, a 4-basic steel pipe pile, a 5-transverse anchoring beam, a 6-portal column, a 7-external prestressed cable, an 8-concrete foundation, a 9-longitudinal anchoring beam, a 10-cover plate, 11-I-steel, 12-stay cable perforation, a 301-lower beam steering block, 601-supporting brackets, 602-portal beams, 603-portal beam steering pieces, 604-jacks and 605-wind cables.
Detailed Description
The following description of the embodiments of the present invention 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 invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the 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 bailey beam temporary support span, is including being used for crossing over bailey beam group 1 of navigation river course or existing road, still includes external prestressing force cable 7, be provided with supporting component around bailey beam group 1's below respectively, install the lower beam 3 of longitudinal extension in the middle of bailey beam group 1's the lower extreme, lower beam steering member 301 is installed to lower beam 3's front and back both ends lower part, install the portal subassembly on the supporting component, portal beam steering member 603 is installed at portal subassembly top, supporting component corresponds portal beam steering member 603 and installs jack 604 under, external prestressing force cable 7 wears to establish in lower beam steering member 301, and the left and right sides of external prestressing force cable 7 is walked around portal beam steering member 603 respectively and is connected with the flexible end anchor of jack 604 that corresponds.
During construction, the tensioning force of the external pre-stressing cable 7 is adjusted through the jack 604, so that the downwarping of the bailey beam set 1 is controlled.
The support 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 posts 6 fixed on the transverse anchoring beams 5 and supporting brackets 601 which are obliquely arranged, wherein portal beams 602 which extend longitudinally are fixed at the tops of the two portal posts 6, the supporting brackets 601 are fixed at the left side and the right side of the top of each portal post 6, the lower ends of the supporting brackets 601 are fixed on the transverse anchoring beams 5, a guy rope perforation 12 is arranged in the middle of each portal beam 602, portal beam steering members 603 are fixed beside the guy rope perforation 12, and jacks 604 are arranged under the guy rope perforation 12.
A wind cable 605 is fixed to the top of each portal column 6, and the other end of the wind cable 605 is anchored to a concrete foundation 8 of a bridge deck or a river bank. Lateral stability of the door frame column 6 is ensured by the wind cable 605.
Preferably, a group of omega-shaped mounting assemblies 2 are welded in the middle of the lower end of the beret beam group 1 in a longitudinal distribution manner, and the lower cross beam 3 is arranged in the omega-shaped mounting assemblies 2 in a penetrating manner.
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 steel bars. The function of the omega-shaped mounting assembly 2 is to enable a safe and convenient suspension of the lower cross member 3.
Preferably, referring to fig. 6, the lower 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 beam 3 is longer than the width of the beret beam set 1; the lower beam steering 301 is formed by bending a seamless steel pipe.
Preferably, the gantry column 6 adopts a steel pipe, the structure of the gantry beam 602 is the same as that of the lower beam 3, a guy cable perforation 12 is reserved in the middle of the cover plate 10 of the gantry beam 602, and the gantry beam steering member 603 is formed by bending a seamless steel pipe.
The construction process flow of the invention is as follows: the prefabricated lower cross beam 3 passes through the prefabricated omega-shaped mounting component 2 and is bound and fixed, the prefabricated lower cross beam 3 is lifted to the midspan bottom of the Bailey beam group 1 by using floating equipment, the prefabricated lower cross beam 2 and the prefabricated Bailey beam group 1 are firmly welded, and the prefabricated 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 the two ends of the erected bailey beam group 1, gantry columns 6 are erected on the transverse anchoring beam 5, the stability of the gantry columns 6 is kept by supporting brackets 602 at two sides of the gantry columns 6, and gantry beams 602 are arranged above the two gantry columns 6. The seamless steel pipe is bent into 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 welded firmly at two ends of the lower beam 3, and the portal beam steering block 603 is welded firmly on the portal beam 602. The external prestressed cable 7 passes through the lower beam steering block 301, is anchored at the telescopic end of the jack 604 through the portal beam steering block 603, and the tensile force is adjusted by the jack 604, so that the lateral stability of the portal column 6 is anchored on the concrete foundation 8 of the bridge bearing platform or the river bank by the wind cable 605. So far, the external prestressing device for improving the span of the temporary support of the bailey beam is installed.
In this embodiment, after the external prestressing device for improving the span of the bailey beam temporary support is installed in place, the external prestressing cable 7 is pretensioned and tensioned. Accordingly, the bailey beam set 1 is normally constructed according to the existing construction scheme to apply load. According to the down-warping condition of the bailey beam set 1, the jack 604 is utilized to adjust the tension at any time, so as to control the down-warping of the bailey beam set 1 within the required range. After the construction is finished, the temporary load on the Bailey beam set 1 is firstly unloaded, and then the jack 604 is used for unloading the tension of the external prestressing device, so that the dismantling can be finished.
Wherein, the control equation for adjusting the tension force is: Wherein: /(I) W is the adjustment target deflection; f is the tensile force of the outer prestressed cable 7, and L is the span of the bailey beam group 1 in fig. 1; h is the height of the door jamb 6 in fig. 1; EI is the bending stiffness of the beret beam set 1 (specifically, table 1 can be looked up).
Table 1 table of the geometric characteristics of the beret beam group
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. 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 disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (8)
1. An external prestressing device for improving bailey beam temporary support span, including being used for crossing over navigation river course or the bailey beam group (1) of existing road, its characterized in that: still include external prestressing force cable (7), be provided with supporting component around the below of bailey beam group (1) respectively, install longitudinally extending's lower beam (3) in the middle of the lower extreme of bailey beam group (1), lower beam steering member (301) are installed to both ends lower part around lower beam (3), install 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 prestressing force cable (7) wear to establish in lower beam steering member (301), and both ends are walked around portal crossbeam steering member (603) respectively and are connected with the flexible end anchor of jack (604) that corresponds about external prestressing force cable (7).
2. An in vitro prestressing device for increasing the span of a temporary support of a bailey beam according to claim 1, characterized in that: the support 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. An in vitro prestressing device for increasing the span of temporary brackets of bailey beams according to claim 2, characterized in that: the portal assembly comprises a pair of portal posts (6) fixed on a transverse anchoring beam (5) and supporting brackets (601) which are obliquely arranged, wherein portal beams (602) extending longitudinally are fixed at the tops of the two portal posts (6), the supporting brackets (601) are fixed at the left side and the right side of the top of each portal post (6), the lower ends of the supporting brackets (601) are fixed on the transverse anchoring beam (5), a guy rope perforation (12) is arranged in the middle of the portal beams (602), portal beam steering members (603) are fixed beside the guy rope perforation (12), and jacks (604) are arranged under the guy rope perforation (12).
4. An in vitro prestressing device for increasing the span of a temporary support of a bailey beam according to claim 3, characterized in that: the top of each portal column (6) is fixedly provided with a wind cable (605), and the other end of the wind cable (605) is anchored on a concrete foundation (8) of a bridge bearing platform or a river bank.
5. An in vitro prestressing device for increasing the span of a temporary support of a bailey beam according to claim 1, characterized in that: a group of omega-shaped mounting assemblies (2) are longitudinally welded in the middle of the lower end of the Bailey beam group (1), and the lower cross beam (3) is arranged in the omega-shaped mounting assemblies (2) in a penetrating mode.
6. An in vitro prestressing device for increasing the temporary stent span of a bailey beam according to claim 5, characterized in that: the omega-shaped mounting assembly (2) is formed by bending a plurality of omega-shaped single components, and the omega-shaped single components are formed by bending steel bars.
7. An in vitro prestressing device for increasing the span of a temporary support of a bailey beam according to claim 3, characterized in that: the lower cross beam (3) comprises 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.
8. An in vitro prestressing device for increasing the temporary stent span of a bailey beam according to claim 7, characterized in that: the portal beam steering piece (603) is formed by bending seamless steel pipes, wherein the portal beam (602) is of the same structure as the lower beam (3), a guy cable through hole (12) is reserved in the middle of a cover plate (10) of the portal beam (602).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910393460.8A CN109972531B (en) | 2019-05-13 | 2019-05-13 | An external prestressing device for increasing the span of a temporary Bailey beam support |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910393460.8A CN109972531B (en) | 2019-05-13 | 2019-05-13 | An external prestressing device for increasing the span of a temporary Bailey beam support |
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| CN109972531A CN109972531A (en) | 2019-07-05 |
| CN109972531B true CN109972531B (en) | 2024-04-23 |
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| CN201910393460.8A Active CN109972531B (en) | 2019-05-13 | 2019-05-13 | An external prestressing device for increasing the span of a temporary Bailey beam support |
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| CN110593115A (en) * | 2019-09-27 | 2019-12-20 | 宁波大学 | Cast-in-place box girder support system and its construction method |
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| CN108708267A (en) * | 2018-04-28 | 2018-10-26 | 江苏省交通工程集团有限公司 | Long span assembled Bailey beam bridge and its erection method |
| CN109537470A (en) * | 2019-01-03 | 2019-03-29 | 中铁北京工程局集团第二工程有限公司 | The Y structure construction bracket structure of battered leg stress can be adjusted in real time |
| CN208803382U (en) * | 2018-08-31 | 2019-04-30 | 中铁二十四局集团安徽工程有限公司 | A kind of CFST Arch Bridge intermediate transverse girder promotion positioning apparatus |
| CN209958229U (en) * | 2019-05-13 | 2020-01-17 | 中铁二十四局集团安徽工程有限公司 | External prestressing device for improving span of temporary support of Bailey beam |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628368B (en) * | 2012-04-26 | 2014-07-09 | 李信斌 | Tunnel self-advancing support shed |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108708267A (en) * | 2018-04-28 | 2018-10-26 | 江苏省交通工程集团有限公司 | Long span assembled Bailey beam bridge and its erection method |
| CN208803382U (en) * | 2018-08-31 | 2019-04-30 | 中铁二十四局集团安徽工程有限公司 | A kind of CFST Arch Bridge intermediate transverse girder promotion positioning apparatus |
| CN109537470A (en) * | 2019-01-03 | 2019-03-29 | 中铁北京工程局集团第二工程有限公司 | The Y structure construction bracket structure of battered leg stress can be adjusted in real time |
| CN209958229U (en) * | 2019-05-13 | 2020-01-17 | 中铁二十四局集团安徽工程有限公司 | External prestressing device for improving span of temporary support of Bailey beam |
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