CN113863172A - Rapid urban bridge dismantling and rebuilding construction method based on gantry crane - Google Patents
Rapid urban bridge dismantling and rebuilding construction method based on gantry crane Download PDFInfo
- Publication number
- CN113863172A CN113863172A CN202111222195.0A CN202111222195A CN113863172A CN 113863172 A CN113863172 A CN 113863172A CN 202111222195 A CN202111222195 A CN 202111222195A CN 113863172 A CN113863172 A CN 113863172A
- Authority
- CN
- China
- Prior art keywords
- bridge
- gantry crane
- steel
- old
- cutting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010276 construction Methods 0.000 title claims abstract description 37
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 109
- 239000010959 steel Substances 0.000 claims abstract description 109
- 238000005520 cutting process Methods 0.000 claims abstract description 49
- 238000000034 method Methods 0.000 claims abstract description 20
- 238000003466 welding Methods 0.000 claims description 15
- 239000011384 asphalt concrete Substances 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- 239000010410 layer Substances 0.000 claims description 6
- 238000003801 milling Methods 0.000 claims description 6
- 238000000354 decomposition reaction Methods 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 239000011083 cement mortar Substances 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000011150 reinforced concrete Substances 0.000 claims description 3
- 239000002344 surface layer Substances 0.000 claims description 3
- 238000004873 anchoring Methods 0.000 claims description 2
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 238000004064 recycling Methods 0.000 abstract description 3
- 238000011065 in-situ storage Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000011218 segmentation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a construction method for quickly dismantling and rebuilding an urban bridge based on a gantry crane, belonging to the field of bridge engineering, and comprising the following steps of S1: constructing an auxiliary road bridge, and guiding traffic to the auxiliary road bridge; step S2: erecting a main bridge gantry crane; step S3: erecting a bridge dismantling support; step S4: erecting an arch rib support; step S5: dismantling the old bridge auxiliary structure and the bridge deck system; step S6: cutting the bridge flange plate by a wire saw and hanging off; step S7: the hanger rods are removed and then transported out of the construction site; step S8: cutting arch ribs and hoisting the arch ribs away by using a gantry crane in sections; step S9: cutting and decomposing the main beam and hoisting off the main beam by sections by using a gantry crane; step S10: constructing an old bridge pier steel sheet pile cofferdam and decomposing and hanging off a lower structure; the invention discloses a quick dismantling and rebuilding method which realizes ecological dismantling of an old bridge and quick erection of a new bridge by recycling a bridge dismantling gantry crane, meets the requirements of navigation restriction and environmental protection, and ensures normal traffic of urban trunk road traffic.
Description
Technical Field
The invention relates to the field of bridge engineering, in particular to a construction method for quickly dismantling and rebuilding an urban bridge based on a gantry crane.
Background
Some steel pipe concrete tied arch bridges built in early city main roads cannot meet the existing traffic requirements along with the increase of operation time, the increase of traffic volume and the improvement of load grade, and are often required to be dismantled and rebuilt in situ.
However, part of bridges are limited by inland river navigation conditions and are ecological and environment-friendly, the processes such as integral removal and blasting methods cannot be realized, and the old bridges can only be dismantled by a reverse-sequence reverse-dismantling method, so that the method needs a long construction period, equipment and facilities in the bridge dismantling process cannot be utilized during newly building the bridges, the time for building a new bridge temporary structure again is long, and the requirement of quickly reconstructing urban main road bridges cannot be met.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to solve the technical problem of providing a quick dismantling and rebuilding method which realizes ecological dismantling of an old bridge and quick erection of a new bridge by recycling a bridge dismantling gantry crane, meets the requirements of navigation restriction and environmental protection, and ensures normal traffic of urban trunk road traffic.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a gantry crane based quick urban bridge demolition and reconstruction construction method, which comprises the following steps:
step S1: constructing auxiliary road bridge, and changing traffic guidance to auxiliary road bridge
Constructing a bored pile of the auxiliary road bridge, pouring an auxiliary road bridge bearing platform and an upright column, hoisting and welding an auxiliary road bridge steel box girder, erecting from two sides to a midspan, and then changing traffic guidance to the auxiliary road bridge;
step S2: main bridge gantry crane erection
Inserting and driving steel pipe pile foundations of a gantry crane on two sides of an old bridge, cutting redundant steel pipes after insertion and driving are completed, connecting the steel pipe piles, installing a Bailey beam on the bridge floor of the old bridge and paving a gantry crane track, and then installing and debugging the gantry crane through the pile foundations of the gantry crane;
step S3: bridge-dismantling support erection
Taking holes in an existing bridge on a main beam of an old bridge, driving down double rows of steel pipe piles, welding a steel pipe connection system, and erecting double-spliced I-shaped steel beams on the tops of the double rows of steel pipe piles;
step S4: arch rib support erection
Erecting an arch rib bracket between an arch rib of an old bridge and a main beam of the old bridge by using a gantry crane, arranging a cable rope anchor in the cross section direction of the existing bridge, and connecting longitudinal upright columns of the existing bridge by using channel steel;
step S5: old bridge auxiliary structure and bridge deck system dismantling method
When the bridge deck auxiliary structure is dismantled, fixing the dismantled object by using an automobile crane or a forklift, and dismantling the bridge deck by using gas cutting by constructors; when the bridge deck system is dismantled, chiseling by using an air pick, then exploring an asphalt concrete layer and a pavement depth of the original bridge deck system, determining the planing and milling thickness, cleaning by using an excavator after crushing, and transferring an earthwork vehicle to a specified abandoning point;
step S6: cutting and hanging bridge flange plate by using wire saw
Cutting a wing plate between the two cross beams, binding the wing plate by using a steel wire rope after cutting, hoisting the wing plate to a flat car through a gantry crane, and transporting the wing plate to the outside of a field for secondary decomposition;
step S7: transporting out of construction site after dismantling boom
Before a single suspender is dismantled, suspenders on two sides are bound for protection, an anchor head at a position 1.5 meters above a bridge floor is fused by oxygen welding, an old bridge tie rod is cut, the suspender is naturally loosened, and then cutting is carried out;
step S8: arch rib cutting and sectional hoisting by gantry crane
The method comprises the following steps of cutting old bridge arch ribs in sections by using a rope saw, immediately hoisting each section to a transport vehicle by using a gantry crane after cutting, and transporting the section out of a site;
step S9: girder cutting and decomposing and gantry crane subsection hoisting
Firstly, drawing a line on a dismantled structure, marking a cutting block, then drilling an operation hole at the intersection point position of cutting lines, firstly cutting along the bridge direction, then cutting along the transverse bridge direction, transferring to a transport vehicle to transport out of the site after cutting one block, and decomposing and crushing again after transporting out of the site;
step S10: to old bridge pier steel sheet pile cofferdam construction and substructure decomposition, hang from
The method comprises the following steps of (1) driving underwater pier columns to remove a steel sheet pile cofferdam, cutting old abutment blocks by adopting ropes, hoisting the removed old abutment blocks to two banks by using a gantry crane to crush the old abutment blocks, and transporting an earthwork vehicle out of the field;
step S11: mounting and welding main bridge steel box girders and dismantling temporary supports
Install and pour the stand main bridge pile foundation cushion cap, through double steel-pipe pile extension, the length direction of main bridge divides 14 sections, and first section new construction steel box girder width direction does not divide the segmentation, and all the other 13 sections divide 7 sections in the width direction, set up the bed-jig between each section, and the hoist and mount direction is hoist and mount to south from north, and at the limit mound accurate positioning after first section new construction steel box girder integral hoisting, the arm is picked after first box room main part, hoist and mount in proper order from the centre to both ends.
The invention preferably adopts the technical scheme that the steel pipe pile is connected with a top part and provided with an I-shaped steel beam, and a limiting device is welded on the top part.
The preferable technical scheme of the invention is that in the step S1, before the beam body is dismantled, the pier beam needs to be temporarily consolidated, and the gaps around the support are filled with cement mortar.
The preferable technical scheme of the invention is that the dismantling modes of the hanger rod and the old bridge arch rib are symmetrically carried out from midspan to two sides.
In the preferred technical scheme of the invention, in the step S5, the asphalt concrete surface layer of the bridge deck system is removed by a planing and milling machine, the reinforced concrete pavement layer is chiseled by a small excavator provided with a breaking hammer, and the chiseling is symmetrically performed from two sides to the middle.
The preferable technical scheme of the invention is that in the step S9, before the block is cut and separated in the transverse bridge direction, the beam body to be lifted off is bound by a steel wire rope, after the whole block is cut off, the beam body is lifted by a portal crane by two-point lifting for about 20cm, the beam body stays for 5-10 minutes, the periphery of the beam body and the condition of the steel wire rope are checked, and the beam body is dispatched to a transport vehicle to be transported out of the site after being confirmed to be correct.
The preferable technical scheme of the present invention is that, in step S10, before the old abutment is removed, a steel sheet pile with a length of 9m is used for maintenance and removal construction.
The preferable technical scheme of the invention is that before the new steel box girder is installed in step S11, an adjusting steel pipe for positioning the new steel box girder needs to be arranged on the operation platform, and a new pier is arranged at the bottom side of the new steel box girder.
The preferable technical scheme of the invention is that in the step S11, the double-row steel pipe piles are subjected to gas cutting to remove the limit welding seam between the support beam and the steel pipe upright post, the hanging beam is bound to the transport ship by a steel wire rope, the steel pipe connection system is cut and hung one by one, the lifting lugs are welded on the upper part of the steel pipe, and the steel pipe is fixedly removed by the steel wire rope and the clamping ring and then cut and hung one by one.
The present invention preferably has a technical solution in which the double row of steel pipe piles is disposed between two sets of old bridge supports composed of old bridge abutments and old bridge piers in step S3.
The invention has the beneficial effects that: the method mainly aims at the existing bridge dismantling and in-situ reconstruction with limited space and navigation limitation, the auxiliary bridge is firstly constructed, the old bridge is dismantled by using the gantry crane after the traffic is guided to the auxiliary bridge, and the gantry crane is used for completing the construction of the continuous steel box girder bridge after the old bridge is dismantled, so that the temporary facility used for dismantling the bridge is fully utilized, the equipment can be repeatedly utilized, the reconstruction in the next bridge dismantling construction is not needed, the requirement of quick reconstruction of the urban trunk road bridge is met, and in the bridge dismantling construction process, the method has the advantages of short construction period and simplicity and convenience in construction, meanwhile, the construction cost is saved, and the requirements of navigation limitation and environmental protection are met.
The quick dismantling and rebuilding method provided by the invention realizes ecological dismantling of an old bridge and quick erection of a new bridge by recycling the bridge dismantling gantry crane, meets the requirements of navigation restriction and environmental protection, and ensures normal traffic of urban trunk road traffic.
Drawings
FIG. 1 is a schematic process flow diagram of a method for rapidly demolishing a bridge according to an embodiment of the present invention;
FIG. 2 is a schematic illustration of an old bridge removal bracket provided in an embodiment of the present invention;
FIG. 3 is a schematic illustration of an old bridge removal elevation provided in an embodiment of the present invention;
FIG. 4 is a schematic illustration of a removed cross-section of an old bridge provided in an embodiment of the present invention;
FIG. 5 is a schematic elevation view of a newly-built steel box girder bridge according to an embodiment of the present invention;
FIG. 6 is a schematic cross-sectional view of a newly-built steel box girder bridge according to an embodiment of the present invention;
in the drawings, the components represented by the respective reference numerals are listed below:
1. old bridge arch rib; 2. an arch rib support; 3. an old bridge tie bar; 4. double rows of steel pipe piles; 5. old bridge piers; 6. a gantry crane pile foundation; 7. a gantry crane; 8. connecting the steel pipe piles; 9. a Bailey beam; 10. a gantry crane track; 11. an old bridge girder; 12. an operating platform; 13. a guy rope; 15. adjusting the steel pipe; 16. newly building a bridge pier; 17. newly building a steel box girder; 18. a steel pipe connection system; 19. double-spliced I-shaped steel cross beams; 20. a limiting device; 21. old abutment.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
A construction method for quickly dismantling and rebuilding an urban bridge based on a gantry crane comprises the following steps:
step S1: constructing auxiliary road bridge, and changing traffic guidance to auxiliary road bridge
Constructing a bored pile of the auxiliary road bridge, pouring an auxiliary road bridge bearing platform and an upright column, hoisting and welding the steel box girder of the auxiliary road bridge, erecting from two sides to a midspan, and then changing traffic guidance to the auxiliary road bridge;
step S2: main bridge gantry crane erection
Inserting and driving a gantry crane steel pipe pile foundation 6 by matching crawler cranes on two sides of an old bridge with a vibration hammer, cutting redundant steel pipes after inserting and driving are finished, connecting 8 by adopting the steel pipe piles, installing a Bailey beam 9 on the bridge floor of the old bridge by adopting a truck crane and paving a gantry crane track 10, and then installing and debugging a gantry crane 7 through the gantry crane pile foundation 6;
step S3: bridge-dismantling support erection
Taking holes of an existing bridge by using a water mill drill on an old bridge main beam 11, driving down double rows of steel pipe piles 4 by using a vibration hammer, then welding steel pipe connecting systems 18, and erecting double-spliced I-shaped steel cross beams 19 at the tops of the double rows of steel pipe piles 4;
step S4: arch rib support erection
An arch rib bracket 2 is erected between an old bridge arch rib 1 and an old bridge main beam 11 by using a gantry crane 7, and a guy rope 13 is arranged along the cross section direction of the existing bridge for pulling and anchoring, and is connected by using channel steel along the longitudinal upright columns of the existing bridge;
step S5: old bridge auxiliary structure and bridge deck system dismantling method
When the bridge deck auxiliary structure is dismantled, fixing the dismantled object by using an automobile crane or a forklift, and dismantling the bridge deck by using gas cutting by constructors; when the bridge deck system is dismantled, chiseling by using an air pick, then exploring an asphalt concrete layer and a pavement depth of the original bridge deck system, determining the planing and milling thickness, cleaning by using an excavator after crushing, and transferring an earthwork vehicle to a specified abandoning point;
step S6: cutting and hanging bridge flange plate by using wire saw
Cutting a wing plate between the two cross beams, binding the wing plate by using a steel wire rope after cutting, hoisting the wing plate to a flat car through a gantry crane 7, transporting the wing plate to the outside of a field, and decomposing again;
step S7: transporting out of construction site after dismantling boom
Before the single suspender 3 is dismantled, the suspenders 3 at two sides are bound for protection, the anchor head at the position 1.5 meters above the bridge floor is fused by oxygen welding, the old bridge tie rod is cut, the suspender 3 is naturally loosened and then cut, and the dismantling sequence of the suspender 3 is that the suspender 3 is symmetrically dismantled from midspan to two sides;
step S8: arch rib cutting and sectional hoisting by gantry crane
Dismantling the old bridge arch rib 1 from a midspan to a side span, symmetrically carrying out single arch from the midspan to two sides, cutting the old bridge arch rib 1 in sections by adopting a wire saw, immediately hoisting each section to a transport vehicle by adopting a gantry crane 7 after cutting, and transporting the section out of the site;
step S9: girder cutting and decomposing and gantry crane subsection hoisting
Firstly, drawing a line on a dismantled structure, marking a cutting block, then drilling a working hole with the diameter of 100mm at the intersection point of cutting lines, firstly cutting along the bridge direction, then cutting along the bridge direction, lifting off one block when cutting, transferring to a transport vehicle, transporting to a site, allowing only the previous transport vehicle each time according to the erection condition of a support, and preventing the transport vehicle from getting on a bridge span being dismantled. Decomposing and crushing again after being transported out of the site;
step S10: to old bridge pier steel sheet pile cofferdam construction and substructure decomposition, hang from
According to the water depth condition of a construction area, an old abutment 21 needs to be dismantled to a river bed surface, in order to prevent the dismantling construction from polluting water, a steel sheet pile with the length of 9m is adopted for maintenance dismantling construction, an underwater pier column is arranged for dismantling a steel sheet pile cofferdam, a gantry crane 7 is used for hoisting the old abutment 21 to two banks for crushing after the old abutment is cut into blocks by adopting ropes, and an earthwork vehicle is transported out of the field;
step S11: mounting and welding main bridge steel box girders and dismantling temporary supports
Install and pour the stand main bridge pile foundation cushion cap, connect long through double steel-pipe pile 4, the length direction of main bridge divides 14 sections, and the newly-built steel box girder 17 width direction of first section does not divide into the segmentation, and all the other 13 sections divide into 7 sections in width direction, set up the bed-jig between each section, and the hoist and mount direction is from north to south hoist, and the newly-built steel box girder 17 of first section is accurate positioning at the side pier after whole hoist, and the cantilever arm behind the first box room main part is hoist and mount in proper order from the centre to both ends.
The invention mainly aims at the existing bridge dismantling and in-situ reconstruction with space limitation and navigation limitation, in the embodiment, the existing bridge is taken as a continuous beam-arch combined bridge, and the newly-built bridge is taken as a variable-section three-span continuous steel box girder as an example, but the dismantled bridge is not limited to the continuous beam-arch combined bridge, and the newly-built bridge is also not limited to the continuous steel box girder bridge.
As a possible implementation manner of the scheme, preferably, an i-shaped steel beam is erected on the top of the steel pipe pile connection 8, and a limiting device 20 is welded.
As a possible implementation manner of this solution, preferably, in step S1, before the beam body is demolished, the pier beam needs to be temporarily consolidated, and the gap around the support is filled with cement mortar to prevent the beam body from shifting during the demolishing process.
In a possible embodiment of this aspect, preferably, in step S5, the asphalt concrete surface layer of the bridge deck system is removed by a milling machine, and the reinforced concrete pavement layer is chiseled by installing a breaking hammer by a mini-excavator, and the chiseling is performed symmetrically from two sides to the middle.
As a possible embodiment of this embodiment, it is preferable that, in step S9, before the block is cut and separated in the transverse direction, the block is bound by a steel wire rope and lifted off the beam, after the block is cut off, the beam is lifted by a gantry crane by two-point lifting for about 20cm, the beam stays for 5 to 10 minutes, the periphery of the beam and the condition of the steel wire rope are checked, and the beam is dispatched to a transport vehicle and transported out of the site after the situation is confirmed.
As a possible embodiment of the present invention, it is preferable that, before the new steel box girder 17 is installed in step S11, the adjusting steel pipes 15 for positioning the new steel box girder 17 are installed on the operation platform 12, and the new piers 16 are installed on the bottom side of the new steel box girder 17.
As a possible implementation manner of the present disclosure, preferably, in step S11, the double-row steel pipe piles 4 are configured to remove the limit welding seam between the support beam and the steel pipe column by gas cutting, bind the hanging beam to the transport ship by using a steel wire rope, cut and hang the steel pipe connection system 18 one by one, weld lifting lugs on the upper portions of the steel pipes, and fixedly remove the steel pipes by using the steel wire rope and a snap ring, and then cut and hang the steel pipes one by one.
As one possible embodiment of this embodiment, it is preferable that the double row of the steel-pipe piles 4 is installed between the two sets of the old bridge supports composed of the old bridge abutments 21 and the old bridge piers 5 in step S3.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. The present invention is not to be limited by the specific embodiments disclosed herein, and other embodiments that fall within the scope of the claims of the present application are intended to be within the scope of the present invention.
Claims (10)
1. A construction method for quickly dismantling and rebuilding an urban bridge based on a gantry crane is characterized by comprising the following steps: the method comprises the following steps:
step S1: constructing auxiliary road bridge, and changing traffic guidance to auxiliary road bridge
Constructing a bored pile of the auxiliary road bridge, pouring an auxiliary road bridge bearing platform and an upright column, hoisting and welding an auxiliary road bridge steel box girder, erecting from two sides to a midspan, and then changing traffic guidance to the auxiliary road bridge;
step S2: main bridge gantry crane erection
Inserting and driving steel pipe pile foundations (6) of a gantry crane on two sides of an old bridge, cutting redundant steel pipes after inserting and driving are finished, connecting the steel pipe piles (8), installing a Bailey beam (9) on the bridge floor of the old bridge and paving a gantry crane track (10), and then installing and debugging the gantry crane (7) through the gantry crane pile foundations (6);
step S3: bridge-dismantling support erection
Taking a hole in an existing bridge on an old bridge main beam (11), driving down double rows of steel pipe piles (4), welding a steel pipe connecting system (18), and erecting double-spliced I-shaped steel beams (19) at the tops of the double rows of steel pipe piles (4);
step S4: arch rib support erection
An arch rib bracket (2) is erected between an old bridge arch rib (1) and an old bridge main beam (11) by using a gantry crane (7), and a cable rope (13) is arranged along the cross section direction of the existing bridge for pulling and anchoring, and is connected by using channel steel between longitudinal upright columns of the existing bridge;
step S5: old bridge auxiliary structure and bridge deck system dismantling method
When the bridge deck auxiliary structure is dismantled, fixing the dismantled object by using an automobile crane or a forklift, and dismantling the bridge deck by using gas cutting by constructors; when the bridge deck system is dismantled, chiseling by using an air pick, then exploring an asphalt concrete layer and a pavement depth of the original bridge deck system, determining the planing and milling thickness, cleaning by using an excavator after crushing, and transferring an earthwork vehicle to a specified abandoning point;
step S6: cutting and hanging bridge flange plate by using wire saw
Cutting a wing plate between the two cross beams, binding the wing plate by using a steel wire rope after cutting, hoisting the wing plate to a flat car through a gantry crane (7), and transporting the wing plate to the outside of a field for secondary decomposition;
step S7: transporting out of construction site after dismantling boom
Before the single suspender (3) is dismantled, the suspenders (3) on two sides are bound for protection, the anchor head at the position 1.5 meters above the bridge floor is fused by oxygen welding, the old bridge tie rod is cut, the suspender (3) is naturally loosened, and then cutting is carried out;
step S8: arch rib cutting and sectional hoisting by gantry crane
The old bridge arch rib (1) is cut in sections by adopting a rope saw, and after each section is cut, the old bridge arch rib is immediately lifted to a transport vehicle by adopting a gantry crane (7) and transported out of the site;
step S9: girder cutting and decomposing and gantry crane subsection hoisting
Firstly, drawing a line on a dismantled structure, marking a cutting block, then drilling an operation hole at the intersection point position of cutting lines, firstly cutting along the bridge direction, then cutting along the transverse bridge direction, transferring to a transport vehicle to transport out of the site after cutting one block, and decomposing and crushing again after transporting out of the site;
step S10: to old bridge pier steel sheet pile cofferdam construction and substructure decomposition, hang from
The underwater pier columns are arranged to remove the steel sheet pile cofferdam, the old abutment (21) is cut into blocks by adopting ropes, the removed old abutment (21) is lifted to two banks by using a gantry crane (7) to be crushed, and an earthwork vehicle is transported out of the field;
step S11: mounting and welding main bridge steel box girders and dismantling temporary supports
Install and pour the stand main bridge pile foundation cushion cap, connect long through double steel-pipe pile (4), the length direction of main bridge divides 14 sections, newly-built steel box girder (17) width direction of first section does not divide into segments, all the other 13 sections divide into 7 sections in width direction, establish the bed-jig between each section, hoist and mount direction from north to south, newly-built steel box girder (17) of first section is accurate positioning at the side mound after whole hoist and mount, the cantilever arm behind the first box room main part, hoist in proper order from the centre to both ends.
2. The rapid demolition and reconstruction construction method for the urban bridge based on the gantry crane according to claim 1, characterized in that:
and an I-shaped steel beam is erected at the top of the steel pipe pile connection (8) and welded with a limiting device (20).
3. The rapid demolition and reconstruction construction method for the urban bridge based on the gantry crane according to claim 1, characterized in that:
in the step S1, before the beam body is dismantled, the pier beam needs to be temporarily consolidated, and the gaps around the support are filled with cement mortar.
4. The rapid demolition and reconstruction construction method for the urban bridge based on the gantry crane according to claim 1, characterized in that:
the hanging rod and the old bridge arch rib (1) are all symmetrically dismantled from midspan to two sides.
5. The rapid demolition and reconstruction construction method for the urban bridge based on the gantry crane according to claim 1, characterized in that:
in the step S5, the asphalt concrete surface layer of the bridge deck system is removed by a planing and milling machine, and the reinforced concrete pavement layer is chiseled by a small excavator with a breaking hammer, wherein the chiseling is symmetrically performed from two sides to the middle.
6. The rapid demolition and reconstruction construction method for the urban bridge based on the gantry crane according to claim 1, characterized in that:
in the step S9, before the block is cut and separated in the transverse bridge direction, the beam body to be lifted is bound by a steel wire rope, after the block is cut off integrally, the beam body is lifted by a portal crane by two-point lifting for about 20cm, the beam body stays for 5 to 10 minutes, the periphery of the beam body and the condition of the steel wire rope are checked, and the beam body is dispatched to a transport vehicle to be transported out of the site after being confirmed to be correct.
7. The rapid demolition and reconstruction construction method for the urban bridge based on the gantry crane according to claim 1, characterized in that:
in the step S10, before the old abutment (21) is removed, a steel sheet pile with a length of 9m is used for maintenance and removal construction.
8. The rapid demolition and reconstruction construction method for the urban bridge based on the gantry crane according to claim 1, characterized in that:
in the step S11, before the new steel box girder (17) is installed, an adjusting steel pipe (15) for positioning the new steel box girder (17) needs to be arranged on the operation platform (12), and a new bridge pier (16) is arranged on the bottom side of the new steel box girder (17).
9. The rapid demolition and reconstruction construction method for the urban bridge based on the gantry crane according to claim 1, characterized in that:
in the step S11, the double-row steel pipe piles (4) are subjected to gas cutting to remove the limit welding seams between the support beams and the steel pipe stand columns, the steel wire ropes are used for binding and hoisting the support beams to a transport ship, the steel pipe connection systems are cut and hoisted one by one, lifting lugs are welded on the upper portions of the steel pipes, and the steel pipes are fixedly removed by adopting the steel wire ropes and clamping rings and then cut and hoisted one by one.
10. The rapid demolition and reconstruction construction method for the urban bridge based on the gantry crane according to claim 1, characterized in that:
in the step S3, the double rows of steel pipe piles (4) are arranged between two groups of old bridge supports consisting of old bridge abutments (21) and old bridge piers (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111222195.0A CN113863172A (en) | 2021-10-20 | 2021-10-20 | Rapid urban bridge dismantling and rebuilding construction method based on gantry crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111222195.0A CN113863172A (en) | 2021-10-20 | 2021-10-20 | Rapid urban bridge dismantling and rebuilding construction method based on gantry crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113863172A true CN113863172A (en) | 2021-12-31 |
Family
ID=78996890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111222195.0A Pending CN113863172A (en) | 2021-10-20 | 2021-10-20 | Rapid urban bridge dismantling and rebuilding construction method based on gantry crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113863172A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114351598A (en) * | 2022-01-26 | 2022-04-15 | 中铁二十二局集团第三工程有限公司 | Construction method for hoisting steel box girder in confined space of complex navigation water area |
| CN114673102A (en) * | 2022-03-31 | 2022-06-28 | 中铁二十二局集团第三工程有限公司 | Steel pipe arch rib dismounting device for tied arch bridge and construction method |
| CN115787524A (en) * | 2022-11-28 | 2023-03-14 | 广东省水利水电第三工程局有限公司 | Construction method for reconstruction of pedestrian bridge based on BIM |
| CN116122189A (en) * | 2023-04-20 | 2023-05-16 | 中铁二十二局集团第二工程有限公司 | Arch bridge dismantling method |
| CN116791494A (en) * | 2023-07-27 | 2023-09-22 | 中国水利水电第三工程局有限公司 | Demolishing and newly-built construction method for riverbed power station traffic bridge |
| CN117188347A (en) * | 2023-08-08 | 2023-12-08 | 中国铁建港航局集团有限公司 | Through bridge dismounting method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU903465A1 (en) * | 1980-05-16 | 1982-02-07 | Специальное Конструкторское Бюро Главмостостроя | Method of dismantling tightened arch-cantilever bridge span structure |
| CN101265690A (en) * | 2007-10-08 | 2008-09-17 | 中铁四局集团有限公司 | Method for dismantling arch bridge for protection |
| CN102146660A (en) * | 2011-02-25 | 2011-08-10 | 中交四航局第一工程有限公司 | Installation methods of cross-arch-rib gantry crane and butterfly arch bridge space structure system |
| CN109235290A (en) * | 2018-10-11 | 2019-01-18 | 中建钢构有限公司 | Bridge peace tears construction method open |
| CN111593665A (en) * | 2020-05-09 | 2020-08-28 | 中铁第五勘察设计院集团有限公司 | Bridge construction method integrating dismantling and construction |
| CN113356056A (en) * | 2021-02-10 | 2021-09-07 | 南通振华重型装备制造有限公司 | Factory assembly and chemical integral manufacturing method for long-span steel bridge |
-
2021
- 2021-10-20 CN CN202111222195.0A patent/CN113863172A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU903465A1 (en) * | 1980-05-16 | 1982-02-07 | Специальное Конструкторское Бюро Главмостостроя | Method of dismantling tightened arch-cantilever bridge span structure |
| CN101265690A (en) * | 2007-10-08 | 2008-09-17 | 中铁四局集团有限公司 | Method for dismantling arch bridge for protection |
| CN102146660A (en) * | 2011-02-25 | 2011-08-10 | 中交四航局第一工程有限公司 | Installation methods of cross-arch-rib gantry crane and butterfly arch bridge space structure system |
| CN109235290A (en) * | 2018-10-11 | 2019-01-18 | 中建钢构有限公司 | Bridge peace tears construction method open |
| CN111593665A (en) * | 2020-05-09 | 2020-08-28 | 中铁第五勘察设计院集团有限公司 | Bridge construction method integrating dismantling and construction |
| CN113356056A (en) * | 2021-02-10 | 2021-09-07 | 南通振华重型装备制造有限公司 | Factory assembly and chemical integral manufacturing method for long-span steel bridge |
Non-Patent Citations (4)
| Title |
|---|
| 张兴立: "上承式钢筋混凝土桁架拱桥主拱圈拆除方案", 《山西建筑》, no. 1 * |
| 王新明: "浅谈柔性系杆拱桥拆除施工技术", 《四川水泥》 * |
| 王新明: "浅谈柔性系杆拱桥拆除施工技术", 《四川水泥》, no. 12, 31 December 2019 (2019-12-31), pages 147 * |
| 黄志猛: "85t龙门吊在拆除新建水中桥施工中的应用", 《中国新技术新产品》, no. 16 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114351598A (en) * | 2022-01-26 | 2022-04-15 | 中铁二十二局集团第三工程有限公司 | Construction method for hoisting steel box girder in confined space of complex navigation water area |
| CN114351598B (en) * | 2022-01-26 | 2023-09-22 | 中铁二十二局集团第三工程有限公司 | Hoisting construction method for steel box girder in limited space of complex navigable water area |
| CN114673102A (en) * | 2022-03-31 | 2022-06-28 | 中铁二十二局集团第三工程有限公司 | Steel pipe arch rib dismounting device for tied arch bridge and construction method |
| CN115787524A (en) * | 2022-11-28 | 2023-03-14 | 广东省水利水电第三工程局有限公司 | Construction method for reconstruction of pedestrian bridge based on BIM |
| CN115787524B (en) * | 2022-11-28 | 2023-09-01 | 广东省水利水电第三工程局有限公司 | BIM-based pedestrian bridge reconstruction construction method |
| CN116122189A (en) * | 2023-04-20 | 2023-05-16 | 中铁二十二局集团第二工程有限公司 | Arch bridge dismantling method |
| CN116791494A (en) * | 2023-07-27 | 2023-09-22 | 中国水利水电第三工程局有限公司 | Demolishing and newly-built construction method for riverbed power station traffic bridge |
| CN116791494B (en) * | 2023-07-27 | 2024-03-08 | 中国水利水电第三工程局有限公司 | Demolishing and newly-built construction method for riverbed power station traffic bridge |
| CN117188347A (en) * | 2023-08-08 | 2023-12-08 | 中国铁建港航局集团有限公司 | Through bridge dismounting method |
| CN117188347B (en) * | 2023-08-08 | 2024-03-29 | 中国铁建港航局集团有限公司 | Through bridge dismounting method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113863172A (en) | Rapid urban bridge dismantling and rebuilding construction method based on gantry crane | |
| CN108060683B (en) | A kind of middle weathering geology top-down construction method | |
| CN112575670B (en) | T-shaped rigid frame bridge suitable for tunnel to pass through giant karst cave and construction technology thereof | |
| CN110331675B (en) | Construction method for rebuilding and expanding bridge | |
| CN110670615A (en) | Subway green construction adjustment method based on limited space | |
| CN111501584A (en) | Bridge dismantling construction method for prestressed concrete continuous beam | |
| CN106939553A (en) | A kind of Steel Bridge Deck and steel box arch rib installation method | |
| CN112252212A (en) | Method for dismantling prestressed concrete variable cross-section continuous beam bridge | |
| CN111254804A (en) | Construction method of steel box girder bridge of overpass highway | |
| CN110552706A (en) | Permanent-temporary combined shield hoisting hole sealing structure and method | |
| CN113106833A (en) | Special-shaped pedestrian landscape bridge structure and construction method thereof | |
| CN111608435A (en) | Subway station and viaduct combined construction structure and construction method thereof | |
| CN110820519A (en) | Tunnel arch bridge convenient for rapid construction and construction method thereof | |
| CN114411721B (en) | Replacement construction method for steel trestle bridge forming and then anchoring steel pipe pile | |
| KR20210078779A (en) | Underground roadway removed upper structure between upper slab and surface of road after constructing the steel continuous wall in the earth by top-down method and method for constructing the same | |
| Hulme et al. | SINGAPORE MASS RAPID TRANSIT SYSTEM: CONSTRUCTION. | |
| CN115748483A (en) | Pile-pier-beam integrated bridge fabrication machine construction method | |
| CN112627002B (en) | Continuous beam bridge suitable for tunnel to pass through giant karst cave and construction technical method thereof | |
| CN211312225U (en) | Pile-column integrated structure based on bridge transformed from existing road surface | |
| CN211900603U (en) | Face combination shield structure hole of hoist enclosed construction forever | |
| CN212317585U (en) | Subway station and viaduct co-construction structure | |
| CN219931050U (en) | Steel column underpinning device by cover digging method | |
| CN220927477U (en) | Assembled under-bridge small box girder is as supporting pile to propping construction structure concurrently | |
| CN114908673B (en) | Deep water foundation trestle and drilling platform construction method | |
| CN220927778U (en) | Large-diameter pile foundation operation platform for deep water karst geology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211231 |
|
| RJ01 | Rejection of invention patent application after publication |