CN111172883B - Assembly type box girder assembled temporary buttress and construction method thereof - Google Patents
Assembly type box girder assembled temporary buttress and construction method thereof Download PDFInfo
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- CN111172883B CN111172883B CN202010034251.7A CN202010034251A CN111172883B CN 111172883 B CN111172883 B CN 111172883B CN 202010034251 A CN202010034251 A CN 202010034251A CN 111172883 B CN111172883 B CN 111172883B
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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
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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Abstract
The invention discloses an assembled box girder assembly temporary buttress and a construction method thereof, wherein the assembled box girder assembly temporary buttress comprises a concrete foundation, a steel pipe column, a bolt, a first steel plate, a preformed hole, a fixed box, a jack, a second steel plate, an inclined strut, a horizontal strut, a plate support, a section steel beam, a baffle, a movable steel pipe and a stop block; the concrete foundation upper surface is provided with the bolt of vertical installation, the bolt lower extreme extends to inside the concrete foundation. The bolt penetrates through the preformed hole, the nut is used for fixing the bolt on the upper part, the first steel plate and the second steel plate can be connected together, if the elevation of the top of the section steel beam needs to be adjusted, the nut on the upper part of the bolt can be moved upwards, the height of the jack is adjusted, and free elevation control is achieved; the baffle and the activity steel pipe that the shaped steel roof beam top set up can realize the interim hinge support in the case roof beam installation, and vertical both ends symmetry welding dog can prevent that the case roof beam from controlling to slide simultaneously.
Description
Technical Field
The invention belongs to the field of bridge engineering, and particularly relates to an assembled box girder assembled temporary buttress and a construction method thereof.
Background
In the construction of large-span bridge, the prefabricated box girder installation need be set up full hall support, and it is time-consuming to take up labour, and factor of safety is low, and a large amount of steel pipe leases and leads to construction cost higher, and the camber sets up not to the best of the people simultaneously. In order to solve the problems, a device for assembling the temporary buttress by the assembly type box girder is urgently needed to realize the quick installation of the large-span box girder.
Disclosure of Invention
The invention aims to solve the problems in the background art and provides an assembled box girder assembled temporary buttress and a construction method thereof.
In order to achieve the purpose, the invention provides the following technical scheme:
an assembled box girder assembled temporary buttress comprises a concrete foundation, a steel pipe column, a bolt, a first steel plate, a preformed hole, a fixed box, a jack, a second steel plate, an inclined strut, a horizontal strut, a plate support, a section steel beam, a baffle, a movable steel pipe and a stop block;
the upper surface of the concrete foundation is provided with a vertically installed bolt, the lower end of the bolt extends into the concrete foundation, the upper end of the bolt is exposed outside the concrete foundation, and the upper end of the bolt is provided with a thread; the first steel plate and the second steel plate are both provided with preformed holes matched with the bolts; a fixed box is fixedly arranged on the upper surface of the first steel plate, a jack is movably arranged on the upper surface of the fixed box, and the height of the second steel plate is adjusted by vertically adjusting the jack; the bolt penetrates through the preformed hole to fixedly connect the first steel plate and the second steel plate with the concrete foundation;
a plurality of steel pipe columns are vertically arranged on the upper surface of the second steel plate, inclined struts are welded among the steel pipe columns in a crossed mode, two ends of each inclined strut are welded on the steel pipe columns, horizontal struts for connecting adjacent steel pipe columns are welded on the upper portions of the steel pipe columns, and plate supports are fixedly arranged at the tops of the steel pipe columns; a section steel beam is fixedly arranged above the plate support; the section steel beam is welded on the plate support, and two baffle plates are fixedly arranged at the flange of the upper part of the section steel beam; the baffle plates are symmetrically welded in the middle of the upper flange of the section steel beam, movable steel pipes are placed between the baffle plates, and baffle blocks are fixedly arranged at the longitudinal two ends of each baffle plate; the movable steel pipe is used for placing the prefabricated box girder.
Preferably, the jack is hydraulic.
Preferably, the number of the steel pipe columns is 4.
Preferably, the section steel beam is I-shaped steel or H-shaped steel.
Preferably, the concrete foundation is a large-volume concrete foundation provided with a steel mesh, and the base of the concrete foundation is subjected to dynamic compaction treatment.
A construction method for assembling a temporary buttress by an assembly type box girder is characterized by comprising the following steps:
firstly: positioning and measuring the position of a foundation pit of an excavated concrete foundation, performing dynamic compaction treatment on the foundation, paving a reinforcing mesh, pre-burying and fixing bolts, pouring the concrete foundation, hoisting a first steel plate to the upper surface of the concrete foundation and enabling the bolts to correspondingly penetrate through reserved holes;
then: welding a second steel plate, the steel pipe column, the inclined strut, the horizontal strut and the plate support to form an upper structure buttress;
secondly, the method comprises the following steps: processing an upper structure buttress and a section steel beam, welding a baffle plate and a stop block, enabling the clear distance between the two stop blocks to be equal to the width of the lower part of a box girder, and integrally welding the section steel beam on an upper structure buttress plate support;
and finally: integrally hoisting the upper structure buttress on the first steel plate, enabling the bolt to penetrate through the preformed hole of the second steel plate, and temporarily fixing the upper structure buttress by using a nut; and loosening the screw cap according to the bottom elevation and the pre-camber of the box girder to be installed, jacking the jack to the designed height, and then fastening the screw cap, so that the pre-camber control for the installation of the large-span bridge can be realized.
Compared with the prior art, the bolt penetrates through the preformed hole, the nut is used for fixing the bolt on the upper part, the first steel plate and the second steel plate can be connected together, if the height mark of the top of the section steel beam needs to be adjusted, the nut on the upper part of the bolt can be moved upwards, the height of the jack is adjusted, and free control of the height mark is achieved; the baffle and the activity steel pipe that the shaped steel roof beam top set up can realize the interim hinge support in the case roof beam installation, and vertical both ends symmetry welding dog can prevent that the case roof beam from controlling to slide simultaneously.
Drawings
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a structural view of the steel section beam according to the present invention.
In the figure: 1. a concrete foundation; 2. a bolt; 3. a first steel plate; 4. reserving a hole; 5. a fixing box; 6. a jack; 7. a second steel plate; 8. steel pipe columns; 9. bracing; 10. horizontally supporting; 11. a plate support; 12. a section steel beam; 13. a baffle plate; 14. a movable steel pipe; 15. and a stop block.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, the present invention provides embodiment 1:
an assembled box girder assembled temporary buttress comprises a concrete foundation 1, a steel pipe column 8, a bolt 2, a first steel plate 3, a preformed hole 4, a fixed box 5, a hydraulic jack 6, a second steel plate 7, an inclined strut 9, a horizontal strut 10, a plate support 11, an I-steel section beam 12, a baffle 13, a movable steel pipe 14 and a stop block 15;
the upper surface of the concrete foundation 1 is provided with a vertically installed bolt 2, the lower end of the bolt 2 extends into the concrete foundation 1, the upper end of the bolt 2 is exposed outside the concrete foundation 1, and the upper end of the bolt 2 is provided with threads; the first steel plate 3 and the second steel plate 7 are both provided with a preformed hole 4 matched with the bolt 2; a fixed box 5 is fixedly arranged on the upper surface of the first steel plate 3, a jack 6 is movably arranged on the upper surface of the fixed box 5, and the elevation of the second steel plate 7 is adjusted by adjusting the jack 6 up and down; the bolt 2 penetrates through the preformed hole 4 to fixedly connect the first steel plate 3 and the second steel plate 7 with the concrete foundation 1;
4 steel pipe columns 8 are vertically arranged on the upper surface of the second steel plate 7, inclined struts 9 are welded among the steel pipe columns 8 in a crossed mode, two ends of each inclined strut 9 are welded on the steel pipe columns 8, horizontal struts 10 for connecting the adjacent steel pipe columns 8 are welded on the upper portions of the steel pipe columns 8, and plate supports 11 are fixedly arranged at the tops of the steel pipe columns 8; a section steel beam 12 is fixedly arranged above the plate support 11; the section steel beam 12 is welded on the plate support 11, and two baffle plates 13 are fixedly arranged at the flange position of the upper part of the section steel beam 12; the baffle plates 13 are symmetrically welded at the middle positions of the flanges of the section steel beams 12, movable steel pipes 14 are placed between the baffle plates 13, and the two longitudinal ends of each baffle plate 13 are fixedly provided with baffle blocks 15; the movable steel pipe 14 is used for placing the precast box girder. The concrete foundation 1 is a large-volume concrete foundation provided with a steel mesh, and the base of the concrete foundation 1 is subjected to dynamic compaction treatment.
Referring to fig. 1-3, the present invention provides embodiment 2:
the difference from example 1 is that: the section steel beam 12 is H-shaped steel.
Referring to fig. 1-3, the present invention provides embodiment 3:
a construction method for assembling a temporary buttress by an assembly type box girder comprises the following steps:
firstly: positioning and measuring the position of a foundation pit of an excavated concrete foundation 1, performing dynamic compaction treatment on the foundation, paving a reinforcing mesh, pre-burying and fixing bolts 2, pouring the concrete foundation 1, hoisting a first steel plate 3 to the upper surface of the concrete foundation 1, and enabling the bolts 2 to correspondingly penetrate through reserved holes 4;
then: welding a second steel plate 7, a steel pipe column 8, an inclined strut 9, a horizontal strut 10 and a plate support 11 to form an upper structure buttress;
secondly, the method comprises the following steps: processing an upper structure buttress and a section steel beam 12, welding baffle plates 13 and baffle blocks 15, enabling the clear distance between the two baffle blocks 15 to be equal to the width of the lower part of a box girder, and integrally welding the section steel beam 12 on an upper structure buttress plate support 11;
and finally: integrally hoisting the upper structure buttress on the first steel plate 3, enabling the bolt 2 to penetrate through the preformed hole 4 of the second steel plate 7, and temporarily fixing the upper structure buttress by using a nut; and loosening the screw cap according to the bottom elevation and the pre-camber of the box girder to be installed, jacking the jack 6 to the designed height, and then fastening the screw cap, so that the pre-camber control for installing the large-span bridge can be realized. A section of the hoisting box girder is placed between the stop blocks 15 on the section steel girder 12. After the connection is finished, only the nut on the bolt 2 needs to be dismounted, and the jack 6 is dismounted.
The invention has the beneficial effects that: the bolt penetrates through the preformed hole, the nut is used for fixing the bolt on the upper part, the first steel plate and the second steel plate can be connected together, if the elevation of the top of the section steel beam needs to be adjusted, the nut on the upper part of the bolt can be moved upwards, the height of the jack is adjusted, and free elevation control is achieved; the baffle and the activity steel pipe that the shaped steel roof beam top set up can realize the interim hinge support in the case roof beam installation, and vertical both ends symmetry welding dog can prevent that the case roof beam from controlling to slide simultaneously.
Claims (6)
1. The utility model provides a temporary buttress is assembled to assembled box girder, includes concrete foundation (1) and steel-pipe column (8), its characterized in that: the steel plate support is characterized by further comprising a bolt (2), a first steel plate (3), a preformed hole (4), a fixing box (5), a jack (6), a second steel plate (7), an inclined strut (9), a horizontal strut (10), a plate support (11), a section steel beam (12), a baffle plate (13), a movable steel pipe (14) and a stop block (15);
the upper surface of the concrete foundation (1) is provided with a vertically installed bolt (2), the lower end of the bolt (2) extends into the concrete foundation (1), the upper end of the bolt (2) is exposed outside the concrete foundation (1), and the upper end of the bolt (2) is provided with threads; the first steel plate (3) and the second steel plate (7) are respectively provided with a preformed hole (4) matched with the bolt (2); a fixed box (5) is fixedly arranged on the upper surface of the first steel plate (3), a jack (6) is movably arranged on the upper surface of the fixed box (5), and the elevation of the second steel plate (7) is adjusted by vertically adjusting the jack (6); the bolt (2) penetrates through the preformed hole (4) to fixedly connect the first steel plate (3) and the second steel plate (7) with the concrete foundation (1);
a plurality of steel pipe columns (8) are vertically arranged on the upper surface of the second steel plate (7), cross-arranged inclined struts (9) are welded among the steel pipe columns (8), two ends of each inclined strut (9) are welded on the steel pipe columns (8), horizontal struts (10) for connecting adjacent steel pipe columns (8) are welded on the upper portions of the steel pipe columns (8), and plate supports (11) are fixedly arranged at the tops of the steel pipe columns (8); a section steel beam (12) is fixedly arranged above the plate support (11); the section steel beam (12) is welded on the plate support (11), and two baffle plates (13) are fixedly arranged at the flange of the upper part of the section steel beam (12); the baffle plates (13) are symmetrically welded in the middle of the upper flange of the section steel beam (12), movable steel pipes (14) are placed between the baffle plates (13), and the two longitudinal ends of the baffle plates (13) are fixedly provided with baffle blocks (15); the movable steel pipe (14) is used for placing the prefabricated box girder.
2. The fabricated box girder assembled temporary buttress according to claim 1, wherein: the jack (6) is hydraulic.
3. The fabricated box girder assembled temporary buttress according to claim 1, wherein: the number of the steel pipe columns (8) is 4.
4. The fabricated box girder assembled temporary buttress according to claim 1, wherein: the section steel beam (12) is I-shaped steel or H-shaped steel.
5. The fabricated box girder assembled temporary buttress according to claim 1, wherein: the concrete foundation (1) is a large-volume concrete foundation provided with a steel bar net piece, and the base of the concrete foundation (1) is subjected to dynamic compaction treatment.
6. The construction method for assembling the temporary buttress by the fabricated box girder according to any one of claims 1 to 5, wherein:
firstly: positioning and measuring the position of a foundation pit of an excavated concrete foundation (1), performing dynamic compaction treatment on the foundation, paving a reinforcing mesh, pre-burying and fixing bolts (2), pouring the concrete foundation (1), hoisting a first steel plate (3) to the upper surface of the concrete foundation (1) and enabling the bolts (2) to correspondingly penetrate through reserved holes (4);
then: welding a second steel plate (7), a steel pipe column (8), an inclined strut (9), a horizontal strut (10) and a plate support (11) to form an upper structure buttress;
secondly, the method comprises the following steps: processing an upper structure buttress and a section steel beam (12), welding a baffle (13) and a stop block (15), enabling the clear distance between the two stop blocks (15) to be equal to the width of the lower part of a box girder, and integrally welding the section steel beam (12) on an upper structure buttress plate support (11);
and finally: integrally hoisting the upper structure buttress on the first steel plate (3), enabling the bolt (2) to penetrate through the preformed hole (4) of the second steel plate (7), and temporarily fixing the bolt by using a nut; and loosening the screw cap according to the bottom elevation and the pre-camber of the box girder to be installed, jacking the jack (6) to the designed height, and then fastening the screw cap, so that the pre-camber control for installing the large-span bridge can be realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010034251.7A CN111172883B (en) | 2020-01-14 | 2020-01-14 | Assembly type box girder assembled temporary buttress and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010034251.7A CN111172883B (en) | 2020-01-14 | 2020-01-14 | Assembly type box girder assembled temporary buttress and construction method thereof |
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| CN111172883A CN111172883A (en) | 2020-05-19 |
| CN111172883B true CN111172883B (en) | 2021-06-01 |
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| CN101476291B (en) * | 2009-01-21 | 2011-04-06 | 中铁一局集团有限公司 | Segment-assembling simply supported box girder movable falsework construction method |
| KR20120108073A (en) * | 2011-03-23 | 2012-10-05 | (주)삼현피에프 | Manufacturing method of box type steel-concrete composite girder and construction method of thereof |
| CN103469733B (en) * | 2013-09-23 | 2015-09-16 | 中建五局土木工程有限公司 | A kind of from falling molding box joist steel Guan Beilei door opening support and bearing method thereof |
| CN206887794U (en) * | 2017-06-30 | 2018-01-16 | 中铁二局集团有限公司 | A kind of supporting apparatus system during the segmentation dismounting for Continuous Bridge |
| JP2019027103A (en) * | 2017-07-28 | 2019-02-21 | 公益財団法人鉄道総合技術研究所 | Concrete filled steel tube column structure |
| CN208803367U (en) * | 2018-07-24 | 2019-04-30 | 中铁七局集团第二工程有限公司 | A kind of assembled steel and concrete combination beam trestle |
| CN110080116A (en) * | 2019-05-30 | 2019-08-02 | 甘肃路桥建设集团有限公司 | A kind of large-span prestressed bent cap supporting apparatus and its construction method |
| CN110387822B (en) * | 2019-06-25 | 2024-04-26 | 浙江欣捷建设有限公司 | Cast-in-situ bent cap assembly type steel pipe support and construction method thereof |
| CN110541353A (en) * | 2019-08-12 | 2019-12-06 | 中铁广州工程局集团桥梁工程有限公司 | Movable type bent cap pouring support and construction method |
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