CN113863166B - Reverse order construction method for swivel-first and mounting support - Google Patents
Reverse order construction method for swivel-first and mounting support Download PDFInfo
- Publication number
- CN113863166B CN113863166B CN202111418610.XA CN202111418610A CN113863166B CN 113863166 B CN113863166 B CN 113863166B CN 202111418610 A CN202111418610 A CN 202111418610A CN 113863166 B CN113863166 B CN 113863166B
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- support
- embedded steel
- steel plate
- reserved anchor
- filler
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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
- E01D21/08—Methods or apparatus specially adapted for erecting or assembling bridges by rotational movement of the bridge or bridge sections
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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
- E01D19/00—Structural or constructional details of bridges
- E01D19/04—Bearings; Hinges
-
- 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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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a reverse order construction method of a swivel-first mounting support, which comprises the steps of mounting an embedded steel plate and a reserved anchor sleeve in a beam body according to a designed position, and mounting a filler embedded steel bar in a side pier, wherein the embedded steel plate is horizontally arranged and provided with a plurality of reserved anchor rod holes, and the positions and the number of the reserved anchor sleeves are matched with the positions and the number of the reserved anchor rod holes in the embedded steel plate; after the beam body rotates in place, positioning the position of the support, so that the reserved anchor rod hole on the top plate of the support is opposite to the reserved anchor rod hole on the embedded steel plate; jacking up the support through the jack to enable the top plate of the support to be attached to the embedded steel plate, and screwing the lower screw rod into the reserved anchoring sleeve in the beam body through the reserved anchor rod hole in the top plate of the support and the reserved anchor rod hole in the embedded steel plate in sequence to enable the support to be hung below the beam body; installing a stiff steel support at the bottom of the support, and removing the jack; binding the filler reinforced bars and installing the templates, and pouring concrete to form the filler.
Description
Technical Field
The invention relates to the technical field of bridge swivel construction, in particular to a reverse order construction method of a swivel-first mounting support.
Background
With the continuous development of national traffic industry, the phenomenon of three-dimensional intersection of bridge structures is generally formed. The bridge swivel construction can reasonably arrange prefabrication by utilizing site conditions, the construction right above a line is changed into parallel existing line construction, traffic is not influenced, the defects that special environments such as deep valleys and rapid flows are difficult to cast in situ or prefabrication box girders are difficult to hoist and the like can be overcome, a large amount of wood or steel can be saved, and the bridge swivel construction is widely applied to overpass bridges such as overstock railways, highways and rivers in recent years. The conventional support construction process at the present stage at home and abroad is to install the support first and then pour or hoist the beam body, but in the construction process of directly transferring the cantilever end of the swivel bridge to the upper part of the pier, because the gap between the bottom of the beam and the pier is smaller, if the support is installed first, the difficulty of swivel can be greatly increased and even the swivel of the bridge can be hindered, so that it is necessary to design a reverse construction process of installing the support first and then rotating the bridge, so as to overcome the problems.
Disclosure of Invention
According to the defects of the prior art, the invention provides a reverse order construction method for first turning and then installing a support, wherein the first bridge turning operation is carried out, and the second support is installed, so that the construction difficulty of the bridge turning is effectively reduced.
The invention is realized by the following technical scheme:
a reverse order construction method for a swivel-first mounting support is characterized in that: the construction method comprises the following steps:
installing an embedded steel plate and a reserved anchor sleeve in a beam body according to a designed position, and installing a filler stone embedded steel bar in a side pier, wherein the embedded steel plate is horizontally arranged and provided with a plurality of reserved anchor rod holes, and the positions and the number of the reserved anchor sleeves are matched with the positions and the number of the reserved anchor rod holes in the embedded steel plate;
after the beam body rotates in place, positioning the position of the support, so that a reserved anchor rod hole on a top plate of the support is opposite to a reserved anchor rod hole on the embedded steel plate;
jacking up the support through a jack to enable a top plate of the support to be attached to the embedded steel plate, and screwing a lower screw rod into a reserved anchor sleeve in the beam body through a reserved anchor rod hole in the top plate of the support and a reserved anchor rod hole in the embedded steel plate in sequence to enable the support to be hung below the beam body;
installing a stiff steel support at the bottom of the support, and removing the jack;
binding the filler reinforced bars and installing the templates, and pouring concrete to form the filler.
Before the stiff steel support is installed, pre-jacking force is applied to the support according to design requirements, so that the support and the embedded steel plate are tightly adhered.
The positioning method of the support comprises the following steps: and drawing an outer contour line of the design position of the support at the top of the side pier, and placing the support at the design position.
After the template is installed, the embedded iron wires are arranged below the support, and after the concrete pouring is completed, air bubbles in the concrete are eliminated by dragging the embedded iron wires in the concrete.
A plurality of threaded holes matched with foundation bolts are formed in the bottom plate of the support, and the foundation bolts are installed in the filler stone through the threaded holes.
The top plate of the support is larger than the bottom plate of the support.
The filler steel bars are respectively connected with the filler embedded bars and the stiff steel supports.
The invention has the advantages that: the construction process is simple and practical, safe and reliable, the construction efficiency is high, the influence of the support and the filler stone on the bridge rotation is avoided, the gap between the bottom of the bridge and the bridge pier is increased when the bridge is directly rotated to the bridge pier, and the difficulty of positioning the bridge once rotation is greatly reduced; the embedded iron wires are used for dragging back and forth to replace a vibrating rod so as to remove air bubbles of the cushion concrete, the compactness of the concrete is effectively guaranteed, the construction is simple and easy to operate, the practical effect is obvious, and meanwhile, the engineering cost is reduced.
Drawings
FIG. 1 is a schematic view of a beam body swivel to pier according to the present invention;
FIG. 2 is a plan view of the mounting of the stand of the present invention;
FIG. 3 is a cross-sectional view of the mount of the present invention;
fig. 4 is a schematic illustration of the casting of a packing stone according to the present invention.
Detailed Description
The features of the invention and other related features are described in further detail below by way of example in conjunction with the following figures to facilitate understanding by those skilled in the art:
as shown in fig. 1-4, the marks 1-14 in the drawings are respectively represented by a beam body 1, a side pier 2, a support 3, a reserved anchor rod hole 4, a filler stone 5, an embedded steel plate 6, a lower screw rod 7, a top plate 8, a bottom plate 9, an anchor bolt 10, a stiff steel support 11, filler stone embedded steel bars 12, embedded iron wires 13 and filler stone steel bars 14.
Examples: as shown in fig. 1 to 4, the present embodiment relates to a reverse order construction method of a swivel-first-mount-then-mount support, the construction method comprising the steps of:
1. when the box girder is suspended and poured to the last section, the embedded steel plate 6 and the reserved anchor sleeve are installed in the girder body 1 according to the designed position, wherein the embedded steel plate 6 is positioned at the bottom of the girder body 1, namely the bottom surface of the embedded steel plate 6 can be used as the bottom surface of the girder body 1. In this embodiment, the pre-buried steel plate 6 is fixed by an upper screw in the beam body 1, so as to ensure the horizontal arrangement of the pre-buried steel plate 6. The four corners of the pre-buried steel plate 6 are respectively provided with a reserved anchor rod hole 4, and the positions and the number of the reserved anchor sleeves are matched with the positions and the number of the reserved anchor rod holes 4 on the pre-buried steel plate 6. In the process of the construction of the beam body 1, the reserved anchor rod holes 4 are required to be protected, and the blocking of the holes caused by the entering of concrete is prevented. In addition, when the side pier 2 is constructed, the filler stone embedded steel bars 12 are required to be installed in the side pier 2, and the tops of the filler stone embedded steel bars 12 extend out of the side pier 2.
2. After the beam body 1 is accurately positioned, an outer contour line of a design position of the support 3 is drawn at the top of the side pier 2, the support 3 is placed on the side pier 2, and the support 3 is horizontally moved to the design position, so that the reserved anchor rod holes 4 on the top plate 8 of the support 3 are opposite to the reserved anchor rod holes 4 of the embedded steel plate 6. In addition, the size of the top plate 8 of the support 3 is larger than that of the bottom plate 9 of the support 3, so that the stress area of the support 3 can be increased, and the reliability of the support 3 is improved.
3. The support 3 is jacked up by the jack, so that the top plate 8 of the support 3 is attached to the embedded steel plate 6, and the lower screw rod 7 is screwed into the reserved anchoring sleeve of the beam body 1 sequentially through the reserved anchor rod hole 4 on the top plate 8 of the support 3 and the reserved anchor rod hole 4 of the embedded steel plate 6, so that the support 3 is hung below the beam body 1. In this embodiment, a pre-jacking force is applied to the support 3 according to design requirements, so as to eliminate the assembly gap between the support 3 and the beam 1 and the compression amount of the support 3, and ensure that the elevation of the beam 1 does not change before and after the support 3 is installed.
4. After the support 3 and the embedded steel plate 6 are tightly adhered, a stiff steel support 11 is arranged at the bottom of the support 3, and then the jack is dismantled.
5. Binding the filler steel bars 14, connecting the filler steel bars 14 with the filler embedded steel bars 12 and the stiff steel supports 11 respectively, reinforcing the connection between the filler 5 and the side pier 2, installing a template, pouring concrete, and removing the template after the concrete is coagulated to form the filler 5. After the template is installed, in order to ensure that concrete below the support 3 is poured compactly, pre-buried iron wires 13 with the diameter of 3mm are arranged longitudinally and transversely, and the pre-buried iron wires 13 penetrate below the support 3; the concrete adopts shrinkage-free micro-expansion concrete, the concrete surface is 5mm higher than the bottom surface of the bottom plate 9 of the support 3, and the air bubbles in the concrete are eliminated and the compactness of the concrete is ensured by dragging the embedded iron wires 13 (the longitudinally arranged embedded iron wires 13 are dragged back and forth along the transverse direction and the transversely arranged embedded iron wires 13 are dragged back and forth along the longitudinal direction). In addition, four threaded holes matched with foundation bolts 10 are formed in the bottom plate 9 of the support 3, and the foundation bolts 10 are installed in the cushion stones 5 through the threaded holes and used for reinforcing connection of the cushion stones 5 and the support 3.
Although the foregoing embodiments have been described in some detail with reference to the accompanying drawings, it will be appreciated by those skilled in the art that various modifications and changes may be made thereto without departing from the scope of the invention as defined in the appended claims, and thus are not repeated herein.
Claims (3)
1. The reverse order construction method of the swivel-first mounting support is characterized by comprising the following steps of:
installing an embedded steel plate and a reserved anchor sleeve in a beam body according to a designed position, and installing a filler embedded steel bar in an edge pier, wherein the top of the filler embedded steel bar extends out of the edge pier; the embedded steel plate is horizontally arranged, a plurality of reserved anchor rod holes are formed in the embedded steel plate, and the positions and the number of the reserved anchor sleeves are matched with those of the reserved anchor rod holes in the embedded steel plate;
after the beam body rotates in place, positioning the position of the support, so that a reserved anchor rod hole on a top plate of the support is opposite to a reserved anchor rod hole on the embedded steel plate; the positioning method of the support comprises the following steps: drawing an outer contour line of the design position of the support at the top of the side pier, and placing the support at the design position;
jacking up the support through a jack to enable a top plate of the support to be attached to the embedded steel plate, and screwing a lower screw rod into a reserved anchor sleeve in the beam body through a reserved anchor rod hole in the top plate of the support and a reserved anchor rod hole in the embedded steel plate in sequence to enable the support to be hung below the beam body;
installing a stiff steel support at the bottom of the support, and removing the jack; before the stiff steel support is installed, pre-jacking force is applied to the support according to design requirements, so that the support and the embedded steel plate are tightly adhered to each other;
binding and template mounting of the filler steel bars, and pouring concrete to form filler, wherein the filler steel bars are respectively connected with the filler embedded steel bars and the stiff steel supports; after the template is installed, the embedded iron wires are arranged below the support, the embedded iron wires with the diameters of 3mm are arranged longitudinally and transversely, and after the concrete pouring is completed, air bubbles in the concrete are eliminated by dragging the embedded iron wires in the concrete.
2. The reverse construction method of a swivel-first-then-mount support according to claim 1, wherein a bottom plate of the support is provided with a plurality of threaded holes matched with anchor bolts, and the anchor bolts are mounted in the filler stone through the threaded holes.
3. A reverse construction method for a swivel-first-mount support as claimed in claim 2, wherein the top plate of the support is larger than the bottom plate of the support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111418610.XA CN113863166B (en) | 2021-11-26 | 2021-11-26 | Reverse order construction method for swivel-first and mounting support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111418610.XA CN113863166B (en) | 2021-11-26 | 2021-11-26 | Reverse order construction method for swivel-first and mounting support |
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| Publication Number | Publication Date |
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| CN113863166A CN113863166A (en) | 2021-12-31 |
| CN113863166B true CN113863166B (en) | 2023-07-25 |
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| CN202111418610.XA Active CN113863166B (en) | 2021-11-26 | 2021-11-26 | Reverse order construction method for swivel-first and mounting support |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114606874B (en) * | 2022-03-16 | 2023-09-19 | 中铁二院昆明勘察设计研究院有限责任公司 | Railway deviation three-wire bridge abutment deviation rectifying processing method |
| CN115030066A (en) * | 2022-06-22 | 2022-09-09 | 广东长大道路养护有限公司 | Reverse installation construction method for basin-type support of bridge |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103161298B (en) * | 2011-12-14 | 2015-08-12 | 五冶集团上海有限公司 | Large-area concrete ground preparation method |
| CN203222997U (en) * | 2013-04-07 | 2013-10-02 | 中铁四局集团第三建设有限公司 | Self-excited oscillation precast beam pedestal |
| CN105421248B (en) * | 2015-12-31 | 2018-01-30 | 中铁二十局集团第一工程有限公司 | Large-Span Continuous girder span building up station turns and closure construction method |
| CN205934703U (en) * | 2016-06-30 | 2017-02-08 | 重庆建工第十一建筑工程有限责任公司 | A high damping shock insulation rubber bearing mounting structure for cast -in -place bridge |
| JP6712201B2 (en) * | 2016-08-31 | 2020-06-17 | 東急建設株式会社 | How to build a pier |
| CN108487080B (en) * | 2018-04-21 | 2019-07-26 | 中铁十七局集团第五工程有限公司 | Super-span T-type rigid structure beam side earnestly supports pinner reversed construction method |
| CN108589555A (en) * | 2018-05-02 | 2018-09-28 | 中铁十局集团第二工程有限公司 | A kind of Rotary ball hinge and Rotary ball hinge installation method |
| CN110468725B (en) * | 2019-08-30 | 2021-05-07 | 中铁六局集团太原铁路建设有限公司 | Rear mounting construction method for side pier support of swivel bridge |
| CN112813850A (en) * | 2021-03-10 | 2021-05-18 | 中铁二十局集团第六工程有限公司 | Construction method of swivel bridge in water-rich area |
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