CN109629449B - Mounting and positioning support and alignment method for steel-concrete combined section of arch foot of steel box arch bridge - Google Patents
Mounting and positioning support and alignment method for steel-concrete combined section of arch foot of steel box arch bridge Download PDFInfo
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- CN109629449B CN109629449B CN201910087069.5A CN201910087069A CN109629449B CN 109629449 B CN109629449 B CN 109629449B CN 201910087069 A CN201910087069 A CN 201910087069A CN 109629449 B CN109629449 B CN 109629449B
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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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Abstract
The invention discloses a mounting and positioning bracket and an alignment method for an arch springsteel-concrete combined section of a steel box arch bridge, which are used for mounting and aligning the steel-concrete combined section and arch springconcrete; the wall surface of the arch springing concrete for contraposition installation is a butt joint surface, the side wall below the butt joint surface is a supporting surface, and the two side walls in the transverse bridge direction are limiting surfaces; the positioning support comprises a supporting truss group and two lateral limiting trusses, wherein the supporting truss group comprises a plurality of supporting trusses, each supporting truss is provided with a supporting section and an installation section, and the supporting sections are provided with slideways for bearing the steel-concrete combination sections; the positioning support is provided with an installation state, when the positioning support is in the installation state, the plurality of supporting trusses are arranged at intervals along the transverse bridge direction, and the installation sections are fixed on the supporting surface; the bottom ends of the two lateral limiting trusses are respectively fixed on two limiting surfaces, and the top ends of the two lateral limiting trusses, the butt joint surface and the supporting section enclose to form a space for the steel-concrete combination section to slide. The positioning support is simple in structure, is directly installed on arch springing concrete when in use, and is simple and easy in installation and removal procedures.
Description
Technical Field
The invention relates to the technical field of steel box arch bridge construction, in particular to a mounting and positioning support and an alignment method for an arch springing and reinforced concrete combined section of a steel box arch bridge.
Background
The traditional mounting support of the steel box arch bridge arch foot steel concrete combination section is a floor type support, namely the mounting support is supported on a bearing platform or a foundation through a large steel pipe (or a lattice column), the construction process of the arch bridge with the height of the arch foot larger than 30m is complicated in the mode, more rod pieces and welded nodes (mainly including a connecting system, an embedded part, a counterfort and the like) need to be hoisted, after the steel concrete combination section is installed, the combination section and the support are locally overlapped on a plane, a tower crane is needed to assist oblique hoisting when the large steel pipe (or the lattice column) is dismantled, and the hoisting working condition is dangerous.
When large-scale hoisting equipment (a floating crane or a cable crane) is adopted to install the arch springing steel box segments, when the number of the arch springing steel boxes and the number of pier body anchor rods are large, the requirement on the positioning accuracy of the large-segment steel boxes is high, and the field construction is difficult.
The conventional floor positioning support mode has the defects of complex installation and disassembly, difficult guarantee of installation and alignment precision, large material consumption and at least 1.5 months of installation period.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the mounting and positioning support for the steel-concrete combined section of the arch springing of the steel box arch bridge, which has a simple structure, is directly mounted on arch springing concrete when in use, and has simple mounting and dismounting procedures.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows: a mounting and positioning support for an arch springsteel-concrete combined section of a steel box arch bridge is used for mounting and aligning the steel-concrete combined section and arch springconcrete; the wall surface of the arch springing concrete used for contraposition installation is a butt joint surface, the side wall positioned below the butt joint surface is a supporting surface, and the two side walls positioned in the transverse bridge direction are limiting surfaces;
it includes:
the supporting truss group comprises a plurality of supporting trusses, each supporting truss is provided with a supporting section and an installation section for being fixed on a supporting surface, and the supporting sections are provided with slideways for bearing the steel-concrete combination sections;
two lateral limiting trusses;
the positioning support is provided with an installation state, when the positioning support is in the installation state, the plurality of supporting trusses are arranged at intervals along the transverse bridge direction, and the installation sections are fixed on the supporting surface; the bottom ends of the two lateral limiting trusses are respectively fixed on two limiting surfaces, and the top ends of the two lateral limiting trusses, the butt joint surface and the supporting section enclose to form a space for the steel-concrete combination section to slide.
Further, the positioning bracket further comprises a pushing device, and when the positioning bracket is in an installation state, the pushing device is arranged on the supporting section and used for pushing the steel-concrete combining section upwards along a direction parallel to the butt joint surface.
Further, the pushing device adopts a jack.
Further, the slide comprises a plurality of sliding seats, and the sliding seats are arranged at intervals along the length direction of the supporting section.
Furthermore, the support truss is provided with a connecting rod and an anchor block, when the support truss is in an installation state, one end of the connecting rod is connected with the corresponding installation section, and the other end of the connecting rod penetrates through the arch springing concrete from the supporting surface and is anchored on the arch springing concrete through the anchor block.
Further, the connecting rod is anchored on the side wall of the arch springing concrete opposite to the supporting surface through the anchor block.
Furthermore, the locating support also comprises a plurality of climbing cones, and when the locating support is in an installation state, the installation section is fixed on the supporting surface through the climbing cones.
The invention also provides a steel box arch bridge arch foot steel-concrete combined section alignment method, which comprises the following steps:
providing a positioning bracket according to claim 1;
the plurality of supporting trusses are arranged at intervals along the transverse bridge direction, the mounting section is fixed on the supporting surface, and the bottom ends of the limiting trusses at two sides are respectively fixed on the two limiting surfaces;
hoisting the reinforced concrete combined section to bear on the slideway by using a sling;
and (4) the connection between the sling and the reinforced concrete combined section is released, so that the reinforced concrete combined section slides to be aligned with the arch springing concrete along the slideway.
Furthermore, after the steel-concrete combined section is lifted to be borne on the slideway and before the connection between the sling and the steel-concrete combined section is released, the alignment method further comprises the step of adjusting the alignment installation angle of the steel-concrete combined section.
Further, the step of adjusting the alignment installation angle of the steel-concrete combined section specifically comprises the following steps:
providing a pushing device and a steel plate copying pad, wherein the pushing device is arranged on the supporting section;
pushing the steel-concrete combined section upwards along the direction parallel to the butt joint surface by a pushing device until the alignment installation angle of the steel-concrete combined section reaches a design angle;
and arranging a steel plate copying pad between the steel-concrete combined section and the slideway.
Compared with the prior art, the invention has the advantages that:
(1) compared with a floor type support, the positioning support provided by the invention is simple in structure, is directly installed on arch springing concrete when in use, and is simple in installation and removal procedures.
(2) When the device is disassembled, the device can be directly disassembled in an auxiliary mode through a chain block or a winch, and safety is greatly improved.
Drawings
Figure 1 is a schematic view of a soffit concrete structure;
fig. 2 is a layout diagram of the positioning bracket according to the embodiment of the present invention in an installation state (the reinforced concrete joint section is not aligned);
FIG. 3 is a schematic view of FIG. 2 taken along the direction D-D;
FIG. 4 is a schematic view taken along the line E-E in FIG. 2;
FIG. 5 is a schematic view of an embodiment of the present invention after installation of a pushing device;
fig. 6 is a layout view of the positioning bracket according to the embodiment of the present invention in an installation state (the steel-concrete bonded section is aligned).
In the figure: A. a butt joint surface; B. a support surface; C. a limiting surface; 1. supporting the truss; 10. a support section; 11. an installation section; 12. a slide base; 13. climbing a cone; 14. a connecting rod; 15. an anchor block; 2. a lateral limiting truss; 3. a pushing device; 4. a steel-concrete combined section; 5. arch foot concrete; 50. an anchor rod; 6. a sling.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Referring to fig. 1, a wall surface of the arch springing concrete 5 for aligned installation is defined as an abutting surface a, a side wall below the abutting surface a is defined as a supporting surface B, two side walls in a transverse direction of the bridge are defined as limiting surfaces C, one end of the anchor rod 50 is located in the arch springing concrete 5, the other end of the anchor rod 50 penetrates out of the abutting surface a, and the anchor rod 50 is generally perpendicular to the abutting surface a.
Referring to fig. 2, an embodiment of the present invention provides a mounting and positioning bracket for an arch springing and reinforced concrete combined section of a steel box arch bridge, which is used for mounting and aligning a reinforced concrete combined section 4 and an anchor rod 50 on arch springing concrete 5; referring to fig. 2 to 4, the positioning bracket comprises a supporting truss group and two lateral limiting trusses 2; the supporting truss group comprises a plurality of supporting trusses 1, each supporting truss 1 is provided with a supporting section 10 and an installation section 11, a slide way for bearing the steel-concrete combined section 4 is arranged on each supporting section 10, and when the steel-concrete combined sections 4 are aligned, the steel-concrete combined sections 4 slide on the slide ways towards the anchor rods 50 by taking the extending direction of the anchor rods 50 as the sliding direction;
referring to fig. 2, the positioning bracket has an installation state, when in the installation state, a plurality of supporting trusses 1 are arranged at intervals along the transverse bridge direction, and an installation section 11 of each supporting truss 1 is fixed on a supporting surface B; along the extension direction of the top end of the anchor rod 50, the support section 10 protrudes out of the butt joint surface A, and the length extension direction of the support section 10 is parallel to the anchor rod 50; the bottom ends of the two lateral limiting trusses 2 are fixed on two limiting faces C respectively, the top ends of the two lateral limiting trusses protrude out of the butt joint face A, and form a space for sliding of the steel-concrete joint section 4 by enclosing the two lateral limiting trusses 2 with the butt joint face A and the supporting section 10, the lateral limiting trusses 2 can keep the steel-concrete joint section 4, and the steel-concrete joint section 4 is prevented from being laterally deviated along a transverse bridge direction.
For the console mode support, the locating support simple structure that this embodiment provided is direct mount on the arch springing concrete when using, need not set up the console mode support that highly is 60m, and the installation is simple and easy with the process of demolising, and installation cycle shortens greatly, and the material quantity also significantly reduces, in 4 counterpoint installation of reinforced concrete combined section, slides through the slide and targets in place, and positioning accuracy can obtain guaranteeing.
When the device is disassembled, the device can be directly disassembled in an auxiliary mode through a chain block or a winch, and safety is greatly improved.
Referring to fig. 2 and 5, the positioning bracket further includes a pushing device 3, when the positioning bracket is in an installation state, one end of the pushing device 3 is disposed on the supporting section 10, the other end of the pushing device is a power output end, the power output end abuts against the steel-concrete combining section 4, and the power output end of the pushing device 3 pushes the steel-concrete combining section 4 upwards by taking a straight line extending direction which is located in a plane where the longitudinal bridge direction is located and is parallel to the butt joint surface a as a pushing direction. In the present embodiment, the pushing device 3 is a jack.
Referring to figure 2, the ramp comprises a plurality of carriages 12, the carriages 12 being spaced apart along the length of the support section 10. Referring to fig. 5, in the present embodiment, the slideway comprises two sliding bases 12, and two thrusters 3 are arranged between the two sliding bases 12.
Referring to fig. 2 and 3, the support truss 1 is provided with a connecting rod 14 and an anchor block 15, and when in the installation state, one end of the connecting rod 14 is connected to the corresponding installation section 11, and the other end of the connecting rod 14 passes through the arch springing concrete 5 from the supporting surface B and is anchored to the arch springing concrete 5 through the anchor block 15, in this embodiment, the connecting rod 14 is made of finish-rolled twisted steel.
In order to better transmit the loads to which the support section 10 is subjected to the soffit concrete 5, the connecting rods 14 are anchored by means of anchor blocks 15 to the side walls of the soffit concrete 5 opposite the support face B.
Referring to fig. 2, the positioning bracket further comprises a plurality of climbing cones 13, and when in an installation state, the installation section 11 is fixed on the supporting surface B through the climbing cones 13. The lateral limiting truss 2 can also be fixed on the limiting surface C through the climbing cone 13.
Referring to fig. 2 and 6, an embodiment of the present invention further provides a method for aligning a steel-concrete combined arch springing section of a steel box arch bridge, including the following steps:
s1: providing the positioning bracket;
s2: the supporting trusses 1 are arranged at intervals along the transverse bridge direction, the mounting sections 11 are fixed on the supporting surfaces B, and the bottom ends of the limiting trusses 2 in the two lateral directions are respectively fixed on the two limiting surfaces C;
s3: hoisting the reinforced concrete combined section 4 to bear on the slideway by using a sling 6;
s4: and (4) the sling 6 is disconnected with the steel-concrete combined section 4, so that the steel-concrete combined section 4 slides along the slideway to be aligned with the arch springing concrete 5.
When the installation locating support, guarantee as far as possible that the counterpoint installation angle of reinforced concrete joint section 4 is unanimous with the design angle, make reinforced concrete joint section 4 directly slide and target in place, if counterpoint installation angle is inconsistent with the design angle, then need adjust the counterpoint installation angle of reinforced concrete joint section 4, consequently, after lifting reinforced concrete joint section 4 to bearing in the slide, untie before being connected of hoist rope 6 and reinforced concrete joint section 4, can adjust according to following step:
a1: providing a pushing device 3 and a steel plate lifting pad, and arranging the pushing device 3 on the supporting section 10;
a2: pushing the steel-concrete combined section 4 upwards along the pushing direction by the pushing device 3 until the alignment installation angle of the steel-concrete combined section 4 reaches a design angle;
a3: and arranging a steel plate copying pad between the steel-concrete combined section 4 and the slideway.
After the steel-concrete combined section 4 is aligned, the installation is carried out according to a set scheme, after the installation is finished, the restraint of the climbing cone 13 and the connecting rod 14 is removed, and the dismantling is assisted by a chain block or a winch. This locating support sets up on hunch foot concrete 5, need not set up the console mode support that highly is 60m, and this locating support simple structure, the installation is simple and easy with the demolish process, and installation cycle can be accomplished about half a month, and installation time shortens greatly, and the material quantity also significantly reduces, in the installation, slides through the slide and targets in place, and positioning accuracy can obtain guaranteeing.
The auxiliary dismantling can be directly carried out through chain blocks or windlasses in the dismantling process, the safety is greatly improved, and the auxiliary dismantling device has strong reference significance in the construction of bridges of the same type.
The present invention is not limited to the above-described embodiments, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements are also considered to be within the scope of the present invention. Those not described in detail in this specification are within the skill of the art.
Claims (10)
1. A mounting and positioning support for an arch springsteel-concrete combined section of a steel box arch bridge is used for mounting and aligning a steel-concrete combined section (4) and arch springconcrete (5); the wall surface of the arch foot concrete (5) used for contraposition installation is a butt joint surface (A), the side wall positioned below the butt joint surface (A) is a supporting surface (B), and the two side walls positioned in the transverse bridge direction are limiting surfaces (C);
it is characterized in that it comprises:
the supporting truss group comprises a plurality of supporting trusses (1), each supporting truss (1) is provided with a supporting section (10) and an installation section (11) fixed on a supporting surface (B), and a slideway used for bearing the steel-concrete combination section (4) is arranged on each supporting section (10);
two lateral limiting trusses (2);
the positioning support is provided with an installation state, when the positioning support is in the installation state, a plurality of supporting trusses (1) are arranged at intervals along the transverse bridge direction, and the installation sections (11) are fixed on a supporting surface (B); the bottom ends of the lateral limiting trusses (2) are respectively fixed on two limiting surfaces (C), and the top ends of the lateral limiting trusses, the butt joint surface (A) and the supporting section (10) enclose a space for the steel-concrete combining section (4) to slide.
2. The positioning frame of claim 1, wherein: the positioning support further comprises a pushing device (3), and when the positioning support is in an installation state, the pushing device (3) is arranged on the supporting section (10) and used for pushing the steel-concrete combining section (4) upwards along a direction parallel to the butt joint face (A).
3. The positioning frame of claim 2, wherein: the pushing device (3) adopts a jack.
4. The positioning frame of claim 1, wherein: the slide comprises a plurality of sliders (12), wherein the sliders (12) are arranged at intervals along the length direction of the support section (10).
5. The positioning frame of claim 1, wherein: the supporting truss (1) is provided with a connecting rod (14) and an anchor block (15), when the supporting truss is in an installation state, one end of the connecting rod (14) is connected with the corresponding installation section (11), and the other end of the connecting rod (14) penetrates through the arch springing concrete (5) from a supporting surface (B) and is anchored on the arch springing concrete (5) through the anchor block (15).
6. The positioning frame of claim 5, wherein: the connecting rod (14) is anchored on the side wall of the arch springing concrete (5) opposite to the supporting surface (B) through an anchor block (15).
7. The positioning frame of claim 1, wherein: the positioning support further comprises a plurality of climbing cones (13), and when the positioning support is in an installation state, the installation section (11) is fixed on the supporting surface (B) through the climbing cones (13).
8. A steel reinforced concrete combined section alignment method for an arch foot of a steel box arch bridge is characterized by comprising the following steps:
providing a positioning bracket as recited in claim 1;
the supporting trusses (1) are arranged at intervals along the transverse bridge direction, the mounting sections (11) are fixed on the supporting surface (B), and the bottom ends of the two lateral limiting trusses (2) are respectively fixed on the two limiting surfaces (C);
hoisting the steel-concrete combined section (4) to bear on the slideway by using a sling (6);
and the sling (6) is disconnected from the reinforced concrete combining section (4), so that the reinforced concrete combining section (4) slides along the slideway to be aligned with the arch springing concrete (5).
9. The alignment method as claimed in claim 8, wherein the alignment method further comprises the step of adjusting the alignment installation angle of the steel-concrete combining section (4) after the steel-concrete combining section (4) is hoisted to be carried on the slideway and before the sling (6) is disconnected from the steel-concrete combining section (4).
10. The alignment method according to claim 9, wherein the step of adjusting the alignment installation angle of the steel-concrete joint section (4) comprises the following steps:
providing a pushing device (3) and a steel plate copying pad, wherein the pushing device (3) is arranged on the supporting section (10);
pushing the steel-concrete combined section (4) upwards along the direction parallel to the butt joint surface (A) by the pushing device (3) until the alignment installation angle of the steel-concrete combined section (4) reaches a design angle;
and the steel plate mat is arranged between the steel-concrete combined section (4) and the slideway.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910087069.5A CN109629449B (en) | 2019-01-29 | 2019-01-29 | Mounting and positioning support and alignment method for steel-concrete combined section of arch foot of steel box arch bridge |
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| CN201910087069.5A CN109629449B (en) | 2019-01-29 | 2019-01-29 | Mounting and positioning support and alignment method for steel-concrete combined section of arch foot of steel box arch bridge |
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| CN109629449A CN109629449A (en) | 2019-04-16 |
| CN109629449B true CN109629449B (en) | 2020-07-17 |
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| CN110593082A (en) * | 2019-09-25 | 2019-12-20 | 中国五冶集团有限公司 | Structure for pre-embedding installation of tied arch bridge steel structure arch foot |
| CN112982181B (en) * | 2021-02-05 | 2022-11-08 | 中交第三公路工程局有限公司 | Construction method for steel-concrete combined section of through-type steel box continuous arch bridge |
| CN113737661B (en) * | 2021-10-11 | 2023-01-31 | 中铁二局集团有限公司 | Construction method for steel-concrete combined section of tower base of cable-stayed bridge |
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| JP2632922B2 (en) * | 1988-05-16 | 1997-07-23 | 大成建設株式会社 | Bridge construction method |
| CN102071644B (en) * | 2010-12-31 | 2012-06-13 | 中铁港航工程局有限公司 | Lifting installation method of integral bridge arch rib |
| CN204199181U (en) * | 2014-10-30 | 2015-03-11 | 中铁十八局集团第五工程有限公司 | A kind of bridge main subarch rib docking auxiliary stand structure |
| CN204311359U (en) * | 2014-12-01 | 2015-05-06 | 中铁山桥集团有限公司 | A kind of steel pipe concrete arch rib bridge arch pin is installed and is used stiffness support |
| CN104562936B (en) * | 2014-12-08 | 2016-11-23 | 中铁六局集团有限公司 | A kind of tie-rod steel pipe arch bridge construction method continuously |
| CN108611958A (en) * | 2018-06-20 | 2018-10-02 | 杭州江润科技有限公司 | CFST Arch Bridge external wrapping concrete arch springing structure and construction method |
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