CN110939065A - Method for jacking bridge by using temporary steel support auxiliary frame - Google Patents
Method for jacking bridge by using temporary steel support auxiliary frame Download PDFInfo
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- CN110939065A CN110939065A CN201911236345.6A CN201911236345A CN110939065A CN 110939065 A CN110939065 A CN 110939065A CN 201911236345 A CN201911236345 A CN 201911236345A CN 110939065 A CN110939065 A CN 110939065A
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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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Abstract
The invention discloses a method for jacking a bridge by utilizing an auxiliary frame of a temporary steel support, and relates to the technical field of bridge construction. The method comprises the following steps: firstly, the method comprises the following steps: the temporary steel support and a limiting device are adopted, the temporary steel support is provided with a main body formed by welding and combining two I-shaped steels, stiffening rib steel plates and top and bottom steel plates, and the limiting device is assembled and welded on site; II, secondly: installation: the temporary steel support is arranged between two transverse lifting beam I-steels below the longitudinal beam I-steel, and the limiting device is arranged on the side surface of the top end of the temporary steel support; thirdly, the method comprises the following steps: and (3) force transmission of a jacking operation steel support: before jacking operation, laying a steel sliding plate on the top of the frame bridge along the jacking direction, and coating grease on the steel sliding plate; when the frame structure bridge is jacked in, the temporary steel support is positioned on the steel sliding plate to play a role in supporting and reducing friction force. The defects of large friction force, deformation, displacement and poor integral stability generated when the sleeper pile is used for jacking are overcome.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to a method for reinforcing and jacking a cross beam in bridge construction, namely a method for jacking a bridge by using a temporary steel support auxiliary frame.
Background
At present, in bridge construction, a cross beam is reinforced and jacked in a process, a sleeper pile is generally adopted for supporting, and the height difference exists between the bottom of the cross beam and the top surface of a frame structure bridge. During jacking operation, the sleeper pile materials are different from those of the cross lifting beam and the frame structure bridge, so that large friction force is generated, the sleeper pile for jacking operation in the blocking points is easy to deform and displace, the overall stability is poor, and labor and operation time are consumed. Therefore, the sleeper pile is not suitable for the reinforcing and jacking operation of the transverse lifting beam.
Disclosure of Invention
The invention provides a method for assisting frame structure bridge jacking by using a temporary steel support, aiming at strengthening temporary connection between a transverse lifting beam and a frame structure bridge, overcoming the defects of large friction force, deformation, displacement and poor integral stability generated when a sleeper pile is used for jacking, and solving the problem that the sleeper pile is not suitable for being used for reinforcing the jacking operation of the transverse lifting beam.
In order to solve the problems, the invention adopts the following technical scheme: a method for jacking a temporary steel support auxiliary frame bridge comprises the following process steps:
the method comprises the following steps: the temporary steel support and a limiting device are adopted, the temporary steel support is provided with a main body formed by welding and combining two I-shaped steels, stiffening rib steel plates and top and bottom steel plates, and the limiting device is assembled and welded on site;
step two: installation: the temporary steel support is arranged between two transverse lifting beam I-steels below the longitudinal beam I-steel, and the limiting device is arranged on the side surface of the top end of the temporary steel support;
after the temporary steel support is in place, the limiting device is assembled and welded on site by an electric welder to form the temporary steel support with a fixed top end and a movable lower end; the limiting device limits the positions among the temporary steel support, the longitudinal beam I-steel and the transverse lifting beam I-steel;
step three: and (3) force transmission of a jacking operation steel support: before jacking operation, laying a steel sliding plate on the top of the frame bridge along the jacking direction, and coating grease on the steel sliding plate; when the frame structure bridge is jacked in, the temporary steel support is positioned on the steel sliding plate to play a role in supporting and reducing friction force;
step four: repeating the third step, and circularly jacking;
step five: after the jacking position passes through the second row of longitudinal beams, performing the second step, and supporting the second row of longitudinal beams by the temporary steel supports;
step six: repeating the third step, and circularly jacking;
step seven: after the jacking position passes through the third row of longitudinal beams, performing the second step, and supporting the third row of longitudinal beams by the temporary steel supports;
step eight: and repeating the third step, and circularly jacking until the jacking reaches the designed position.
Further, the method for jacking the bridge by using the temporary steel support auxiliary frame structure further has the following characteristics: the temporary steel support comprises two vertical I-shaped steels arranged side by side, stiffening rib plates and a top bottom steel plate, the edges of transverse plates of the two vertically arranged I-shaped steels are welded together, the stiffening rib plates are arranged in gaps between the two welded I-shaped steels at equal intervals along the height direction, the stiffening rib plates are welded with the I-shaped steels, and the top and the bottom of the two I-shaped steels are welded with the top bottom steel plate.
Further, the method for jacking the bridge by using the temporary steel support auxiliary frame structure further has the following characteristics: stop device includes angle steel, two right triangle's triangle steel sheet, the I shaped steel board and the II shaped steel board of rectangle, and two opposite sides of the II shaped steel board that the level set up weld with the I shaped steel board bottom limit of the angle steel right angle inboard, vertical setting respectively, and 2 hypotenuses of two triangle steel sheets are relative, right angle and angle steel lateral surface welding.
Further, the method for jacking the bridge by using the temporary steel support auxiliary frame structure further has the following characteristics: and in the second step, the I-shaped steel plate of the limiting device is respectively welded with the longitudinal beam I-shaped steel, the transverse lifting beam I-shaped steel and the temporary steel support, and the outer right-angle sides of the two triangular steel plates of the limiting device are respectively welded with the transverse lifting beam I-shaped steel at the two sides.
Compared with the prior art, the invention has the beneficial effects that:
(1) the temporary steel support is simple and convenient to manufacture, and has the advantages of high strength, high rigidity and good stability.
(2) Practice proves that under the condition that the elevation difference exists between the transverse lifting beam and the frame structure top in the transverse lifting beam reinforcing jacking operation and the temporary steel support is adopted for assisting jacking, the jacking stroke of each shift is effectively increased through the invention, and the total jacking period is shortened by three days.
(3) Construction cost is effectively reduced while construction quality is guaranteed, labor force dragging is reduced, and time is greatly saved.
Drawings
FIG. 1 is a front view of a temporary steel support;
FIG. 2 is a side view of a temporary steel support;
FIG. 3 is a top view of a temporary steel support;
FIG. 4 is a front view of the spacing device;
FIG. 5 is a top view of the spacing device;
FIG. 6 is a side view of the stop device;
FIG. 7 is a top view of the connection of the limiting device and the temporary steel support;
FIG. 8 is a side view of the stop device connected to the temporary steel support;
FIG. 9 is a front schematic view of the structures of the frame bridge, the temporary steel support, the steel slide plate and the limiting device;
FIG. 10 is a structural plan view of the frame bridge, the temporary steel support, the steel slide plate and the limiting device;
FIG. 11 is a schematic side view of the structures of the frame bridge, the temporary steel support, the steel slide plate and the limiting device;
FIG. 12 is a schematic diagram of the jacking operation of the present invention.
Description of the symbols: the temporary steel support is 1, I-shaped steel is 1-1, stiffening rib plates are 1-2, steel plates on the top and bottom surfaces are 1-3, a limiting device is 2, angle steel is 2-1, triangular steel plates are 2-2, I-shaped steel plates are 2-3, II-shaped steel plates are 2-4, longitudinal beam I-shaped steel is 3, a first row of longitudinal beams is 3-1, a first row of longitudinal beams is 3-2, a first row of longitudinal beams is 3-3, transverse lifting beam I-shaped steel is 4, a steel sliding plate 5, a concrete buttress is 6, a frame bridge 7, a frame bridge top surface is 7-1, U-shaped fittings are 8, a protective pile 9, a jacking working range is 10, and a jacking direction is.
Detailed Description
The present invention will be described in detail with reference to the following preferred embodiments.
A method for jacking a temporary steel support auxiliary frame bridge comprises the following process steps:
the method comprises the following steps: as shown in fig. 1-6, a temporary steel support and a limiting device are adopted, the temporary steel support is mainly composed of two I-shaped steels I63C, stiffening rib steel plates with the thickness of 20mm, and top and bottom steel plates through welding to form a main body, the parts of the limiting device are formed by processing the steel plates with the thickness of 10mm, and the limiting device is assembled and welded on site.
The temporary steel support 1 comprises two vertical I-shaped steels 1-1 arranged side by side, stiffening rib plates 1-2 and top and bottom surface steel plates 1-3, the edges of transverse plates of the two vertically arranged I-shaped steels 1-1 are welded together, the stiffening rib plates 1-2 are arranged in gaps between the two welded I-shaped steels 1-1 at equal intervals along the height direction, the stiffening rib plates 1-2 are welded with the I-shaped steels 1-1, and the top and bottom surfaces of the two I-shaped steels 1-1 are welded with the top and bottom surface steel plates 1-3.
The limiting device 2 comprises angle steel 2-1, two right-angled triangle-shaped triangular steel plates 2-2, rectangular I-shaped steel plates 2-3 and II-shaped steel plates 2-4, two opposite sides of the horizontally arranged II-shaped steel plates 2-4 are respectively welded with the inner sides of the right angles of the angle steel 2-1 and the bottom sides of the vertically arranged I-shaped steel plates 2-3, the oblique sides of the two triangular steel plates 2-2 are opposite, and the right angles are welded with the outer sides of the angle steel 2-1.
Step two: installation: as shown in fig. 7-9, the temporary steel support is manually installed by mechanical cooperation, the temporary steel support 1 is installed between two cross-beam I-steels 4 below a longitudinal beam I-steel 3, the limiting device 2 is installed on the side surface of the top end of the temporary steel support 1, the I-shaped steel plates 2-3 are respectively welded with the longitudinal beam I-steel 3, the cross-beam I-steel 4 and the temporary steel support 1, and the outer right-angle sides and 2-1 of two triangular steel plates 2-2 of the limiting device 2 are respectively welded with the cross-beam I-steels 4 on two sides.
After the temporary steel support is in place, the limiting device is assembled and welded on site by an electric welder to form the temporary steel support with a fixed top end and a movable lower end; the position between the temporary steel support 1, the longitudinal beam I-steel 3 and the transverse lifting beam I-steel 4 is limited by the limiting device.
Step three: and (3) force transmission of a jacking operation steel support: as shown in fig. 10-12, before the jacking operation, the steel sliding plate 5 is laid on the top of the frame bridge 7 along the jacking direction, and is coated with grease for lubricating; when the frame structure bridge is jacked in, the temporary steel support is positioned on the steel sliding plate to play a role in supporting and reducing friction force. In the step, the key point of the invention is that the steel sliding plate, the temporary steel support and the limiting device are laid, and other modes of jacking operation are the same as the existing frame structure bridge jacking technology.
Step four: and repeating the third step and circularly jacking.
Step five: and step two is carried out after the jacking position passes through the second row of longitudinal beams, and the temporary steel supports support the second row of longitudinal beams.
Step six: and repeating the third step and circularly jacking.
Step seven: and step two is carried out after the jacking position passes through the third row of longitudinal beams, and the temporary steel supports support the third row of longitudinal beams.
Step eight: and repeating the third step, and circularly jacking until the jacking reaches the designed position.
Claims (4)
1. A method for jacking a bridge by utilizing an auxiliary frame of a temporary steel support is characterized by comprising the following process steps: the method comprises the following steps: the temporary steel support and a limiting device are adopted, the temporary steel support is provided with a main body formed by welding and combining two I-shaped steels, stiffening rib steel plates and top and bottom steel plates, and the limiting device is assembled and welded on site; step two: installation: the temporary steel support is arranged between two transverse lifting beam I-steels below the longitudinal beam I-steel, and the limiting device is arranged on the side surface of the top end of the temporary steel support; after the temporary steel support is in place, the limiting device is assembled and welded on site by an electric welder to form the temporary steel support with a fixed top end and a movable lower end; the limiting device limits the positions among the temporary steel support, the longitudinal beam I-steel and the transverse lifting beam I-steel; step three: and (3) force transmission of a jacking operation steel support: before jacking operation, laying a steel sliding plate on the top of the frame bridge along the jacking direction, and coating grease on the steel sliding plate; when the frame structure bridge is jacked in, the temporary steel support is positioned on the steel sliding plate to play a role in supporting and reducing friction force; step four: repeating the third step, and circularly jacking; step five: after the jacking position passes through the second row of longitudinal beams, performing the second step, and supporting the second row of longitudinal beams by the temporary steel supports; step six: repeating the third step, and circularly jacking; step seven: after the jacking position passes through the third row of longitudinal beams, performing the second step, and supporting the third row of longitudinal beams by the temporary steel supports; step eight: and repeating the third step, and circularly jacking until the jacking reaches the designed position.
2. The method for constructing the bridge jacking by using the temporary steel support auxiliary frame as claimed in claim 1, wherein the temporary steel support comprises two I-shaped steels which are vertically arranged side by side, stiffening rib plates and top and bottom steel plates, the edges of the transverse plates of the two I-shaped steels which are vertically arranged are welded together, the stiffening rib plates are arranged in the gap between the two welded I-shaped steels at equal intervals along the height direction, the stiffening rib plates are welded with the I-shaped steels, and the top and bottom steel plates of the two I-shaped steels are welded.
3. The method for jacking up a bridge by using a temporary steel support auxiliary frame as claimed in claim 1 or 2, wherein the limiting device comprises angle steel, two triangular steel plates with right triangle, a rectangular I-shaped steel plate and a rectangular II-shaped steel plate, two opposite sides of the horizontally arranged II-shaped steel plate are respectively welded with the inner side of the right angle of the angle steel and the bottom side of the vertically arranged I-shaped steel plate, the two triangular steel plates 2 have the inclined sides opposite to each other, and the right angle is welded with the outer side of the angle steel.
4. The method for jacking the bridge by using the temporary steel support auxiliary frame as claimed in claim 3, wherein in the second step, the I-shaped steel plate of the limiting device is welded with the longitudinal beam I-shaped steel, the transverse lifting beam I-shaped steel and the temporary steel support respectively, and the outer right-angle sides of the two triangular steel plates of the limiting device are welded with the transverse lifting beam I-shaped steel at the two sides respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911236345.6A CN110939065B (en) | 2019-12-05 | 2019-12-05 | Method for jacking bridge by using temporary steel support auxiliary frame |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911236345.6A CN110939065B (en) | 2019-12-05 | 2019-12-05 | Method for jacking bridge by using temporary steel support auxiliary frame |
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| CN110939065A true CN110939065A (en) | 2020-03-31 |
| CN110939065B CN110939065B (en) | 2021-12-17 |
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