CN211228171U - Beam end sliding auxiliary device for beam falling construction - Google Patents
Beam end sliding auxiliary device for beam falling construction Download PDFInfo
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- CN211228171U CN211228171U CN201922162818.4U CN201922162818U CN211228171U CN 211228171 U CN211228171 U CN 211228171U CN 201922162818 U CN201922162818 U CN 201922162818U CN 211228171 U CN211228171 U CN 211228171U
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Abstract
The utility model relates to a roof beam construction end beam that falls slides auxiliary device, it highly is greater than the roof beam end support height and includes the stone pad that can fix beam end support both sides on the abutment, it has the heating member to bury in the stone pad, and the heating member can heat to the hot melt state to the stone pad, the stone pad top surface is fixed with support piece, and the support piece top surface is provided with the recess, is provided with a plurality of roller bearings in the recess, and the roller bearing can roll along the vertical direction of bridge in the recess, and the diameter of roller bearing is greater than the recess degree of depth setting, uses the utility model discloses a slide auxiliary device can effectively avoid the damage of steel box girder to the roof beam end support when the roof beam construction that falls.
Description
Technical Field
The utility model relates to a civil engineering bridge technical field, concretely relates to roof beam construction beam-ends slip auxiliary device falls.
Background
The steel-concrete combined box girder is a novel structure developed on the basis of steel structures and concrete structures, and consists of an upper reinforced concrete slab and a lower steel box girder. The concrete slab and the steel box girder are connected through a shear connector. The concrete slab on the upper part bears the compressive stress of the beam body, and the steel box beam on the lower part bears the tensile force. The structure can better exert material performance, and has the advantages of small self weight, good shock resistance and durability, convenient construction and the like, so the structure is more widely applied to the construction of highway bridges.
However, in the case of the steel-concrete composite continuous beam, since it is a hyperstatic structural system, in the hogging moment region, the combined action between the steel beam and the concrete slab may cause the composite beam to be in an unfavorable state of tension of the concrete and compression of the steel beam, and it is very easy to cause cracking of the concrete slab. At present, the engineering industry adopts a 'beam falling method' for a steel-concrete combined continuous beam to avoid the problem. The 'girder falling method' is characterized in that a pier top cushion block is used in the installation process of the steel box girder, the top surface of a main pier support is higher than the design elevation by about 50cm, then a concrete slab is poured, after the strength and age of the concrete meet the design requirements, the pier top cushion block is removed, and a pier top main girder is sunk by 50cm, so that the concrete slab on the top surface is in a stressed state, and cracks are avoided.
The inventor finds that although the 'beam falling method' can effectively avoid early cracking of a concrete slab, in the beam falling process of the main pier top, the main beam falls by 50cm, so that the main beam is longitudinally extended, the end part of the main beam generates longitudinal displacement along the bridge direction, although the displacement is not large, the end part support of the main beam has frictional resistance, so that the end part support of the main beam is easily longitudinally sheared and damaged, and the overall quality of the structure is influenced, and at present, a better solution is not provided.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the not enough of prior art, provide a roof beam construction end beam slip auxiliary device falls, can effectively avoid falling in the roof beam work progress, the longitudinal displacement of girder tip is to the longitudinal shear destruction of roof beam end support.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a roof beam construction end beam that falls slides auxiliary device, its highly is greater than the beam-ends support height, including can fixing the bed stone in abutment upper beam-ends support both sides, bury in the bed stone and have the heating member, the heating member can heat to the hot melt state to the bed stone, the bed stone top surface is fixed with support piece, and the support piece top surface is provided with the recess, is provided with a plurality of roller bearings in the recess, and the roller bearing can roll along the longitudinal direction of bridge in the recess, and the diameter of roller bearing is greater than the recess degree of depth and sets up.
Furthermore, the pad stone is formed by pouring sulfur mortar.
Furthermore, the heating element adopts a resistance wire.
Furthermore, the plurality of rollers are arranged along the length direction of the groove, the length direction of the groove is parallel to the longitudinal direction of the bridge, and the axis of each roller is perpendicular to the longitudinal direction of the bridge.
Furthermore, the support piece is of a cuboid structure and made of steel, and a groove is formed in the top surface of the support piece.
Furthermore, scale marks are marked on the side face, parallel to the longitudinal direction of the bridge, of the supporting piece and used for measuring the longitudinal sliding distance of the beam end.
The utility model also discloses a use method of roof beam construction beam-ends slip auxiliary device falls, including following step:
step 1: and (4) pouring cushion stones at the positions of two sides of the support at the upper beam end of the abutment, and installing the supporting piece after the cushion stones reach set strength.
Step 2: a plurality of rollers are placed inside the grooves of the support.
And step 3: and hoisting the steel box girder of the side span at the end part of the bridge, placing the steel box girder on the rolling shaft, and supporting the steel box girder of the side span of the bridge by using the girder-falling construction beam-end sliding auxiliary device.
And 4, step 4: closing the steel box girder of the bridge side span and the steel box girder of the midspan, pouring a concrete bridge deck after closing, then carrying out girder dropping construction on the steel box girder of the midspan of the bridge, extruding the steel box girder of the bridge side span by the steel box girder of the midspan of the bridge, and sliding the steel box girder of the bridge side span along the supporting piece through the rolling shaft.
And 5: after the steel box girder of bridge midspan construction of falling the roof beam is accomplished, start the heating member, heat the bed stone, the bed stone heats to the hot melt state gradually, and the steel box girder of side span falls to the beam-ends support on, behind beam-ends support column steel box girder, takes off support piece and roller bearing to clear up the bed stone of hot melt.
Further, before step 3, the side groove surface of the groove is evenly coated with engine oil, so that the two ends of the rolling shaft are prevented from being clamped in the groove.
Furthermore, in step 2, after the rolling shaft is placed in the groove, the positioning piece is used for positioning and fixing, and in step 3, after the rolling shaft supports the steel box girder, the positioning piece is taken down.
Furthermore, the positioning piece is made of wedge-shaped wood blocks.
The utility model has the advantages that:
1. use the utility model discloses a slip auxiliary device, moreover, the steam generator is simple in structure, supporting mechanism's whole height highly is greater than the height of beam-ends support, the steel box roof beam of midspan falls during the roof beam construction, usable slip auxiliary device supports the steel box roof beam of sidespan, make the steel box roof beam of sidespan not contact with the beam-ends support, under the effect of roller bearing, the steel box roof beam can follow support piece and carry out longitudinal sliding, because the steel box roof beam does not contact with the beam-ends support, its longitudinal sliding can not produce the longitudinal shear destruction to the beam-ends support, the bed stone can be hot melt gradually under the effect of heating member, can make the steel box roof beam slowly fall to the beam-ends support, and convenient for construction, and fast, construction efficiency is greatly improved, construction time is saved, and good engineering economy is possessed.
2. The utility model discloses a slip auxiliary device, the bed stone adopts sulphur mortar bed stone, has higher intensity under the normal atmospheric temperature, support steel box roof beam that can be stable, can the hot melt soften after being heated, realized with the slow whereabouts of steel box roof beam to the beam-ends support on, avoided the damage of steel box roof beam to the beam-ends support.
3. The utility model discloses a slip auxiliary device is provided with the scale mark on support piece's the side, and when can detecting the roof beam construction that falls, the beam-ends vertical slip distance can assist the inspection to fall roof beam safety and quality.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
Fig. 1 is a schematic side view of the overall structure of embodiment 1 of the present invention;
fig. 2 is a schematic front view of the overall structure of embodiment 1 of the present invention;
fig. 3 is a schematic side view of a sliding assistance device according to embodiment 2 of the present invention in a use state;
fig. 4 is a schematic front view of a sliding assistance device according to embodiment 2 of the present invention in a use state;
the steel box girder comprises a base, a supporting piece, a groove, a rolling shaft, a scale mark, a beam end support, a support cushion block, a bridge abutment and a steel box girder, wherein the base comprises 1 part of a cushion stone, 2 parts of a supporting piece, 3 parts of a groove, 4 parts of a rolling shaft, 5 parts of a scale mark, 6 parts of a girder end support, 7 parts of a support cushion block, 8.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
For convenience of description, the words "upper", "lower", "left" and "right" in the present application, if any, merely indicate correspondence with the upper, lower, left and right directions of the drawings themselves, and do not limit the structure, but merely facilitate the description of the present invention and simplify the description, rather than indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Just as the introduction of background art, when current beam construction that falls was carried out, the steel box girder of sidespan produced longitudinal displacement, produced the vertical shear failure to the beam-ends support easily, to the above-mentioned problem, this application has proposed a beam construction beam-ends slip auxiliary device that falls.
In a typical embodiment example 1 of this application, as shown in fig. 1-2, a roof beam construction beam end slip auxiliary device falls, including being used for setting up the base stone 1 in beam-ends support one side, the base stone is the cuboid structure, and its size is 50cmX50cmX25cm, adopts the pouring of sulphur mortar to form, and its inside pre-buried heating member, the heating member adopts the resistance wire, and under the normal atmospheric temperature, the base stone has higher intensity, can provide stable holding power, and under the heating effect of resistance wire, the base stone can be heated gradually to the hot melt state by the resistance wire, is heated the softening, can't provide sufficient holding power.
The top surface of stone pad is fixed with support piece 2, support piece is the cuboid structure, is made by steel, and its bottom surface size is the same with the top surface size of stone pad, support piece's top surface is provided with recess 3, the width of recess is 40cm, and the degree of depth is 2.5cm, the length direction parallel of recess sets up with the longitudinal direction of bridge, four roller bearings 4 have been placed in the recess, the length of roller bearing is 39cm, slightly is less than the width of recess, the diameter of roller bearing is 5cm, is greater than the degree of depth of recess for the top of roller bearing can stretch out to the support piece top, the longitudinal direction setting of the axis perpendicular to bridge of roller bearing makes the roller bearing can roll along the longitudinal direction of bridge in the recess.
The lateral surface that support piece is on a parallel with bridge longitudinal direction is provided with scale mark 5, the scale mark sets up along bridge longitudinal direction, and the distance between the adjacent scale mark is 5mm for measure the sliding distance of steel box girder along bridge longitudinal direction.
In this embodiment, the overall height of the sliding auxiliary device formed by the pad, the supporting member, and the roller after being installed on the abutment is about 1cm higher than the top surface of the beam-end support 6, so that the sliding auxiliary device can support the steel box girder without the bottom surface of the steel box girder contacting with the top surface of the beam-end support.
Example 2:
the embodiment discloses a use method of a beam end sliding auxiliary device for beam falling construction, which comprises the following steps: as shown in fig. 3-4, a support cushion block 7 is poured on an abutment 8 at a beam end in advance, the beam end support is fixed on the support cushion block after the support cushion block reaches a set strength, and the use method of the beam end sliding auxiliary device for beam falling construction comprises the following specific steps:
step 1: utilize sulphur mortar to pour into a mould the stone pad on the abutment position of beam-ends support both sides, during the pouring, at the inside pre-buried resistance wire of stone pad, the stone pad of beam-ends support both sides is for beam-ends support symmetric distribution, after the stone pad reaches and sets for intensity, fixes support piece on the top surface of stone pad.
Step 2: evenly paint machine oil on two side groove faces of the support piece groove, evenly arrange four rollers at the middle position inside the groove, set up the axis of four rollers perpendicular to the longitudinal direction of the bridge, and utilize the setting element to fix a position four rollers temporarily, preferably, the setting element adopts the wedge-shaped billet, machine oil plays the lubrication action, prevents that the roller both ends card is inside the groove.
And step 3: the steel box girder 9 of the bridge end side span is hoisted, the steel box girder is placed on a roller of a supporting piece after being hoisted to a set position, the steel box girder is supported by the girder falling construction beam end sliding auxiliary device, the wedge-shaped wood block is taken down, at the moment, the sliding auxiliary device supports the steel box girder, and the steel box girder is not contacted with the beam end support because the height of the sliding auxiliary device is greater than that of the beam end support.
And 4, step 4: after the sliding auxiliary device supports the steel box girder of the bridge side span, a mark line is drawn on the steel box girder of the bridge side span, then the steel box girder of the bridge side span and the steel box girder of the midspan are closed, a concrete bridge deck is poured after closing, after pouring of the concrete bridge deck is completed, beam falling construction is carried out on the steel box girder of the midspan part of the bridge, in the beam falling construction process, the steel box girder of the midspan extrudes the steel box girder of the side span, the steel box girder of the side span slides along the longitudinal direction of the bridge, the steel box girder slides along the supporting piece under the action of the rolling shaft, the position before and after the mark line slides is recorded by utilizing and using the scale line, and the sliding distance of the steel box girder of the bridge side span is obtained.
And 5: after the steel box girder of bridge midspan part fell the roof beam construction and accomplish, to the resistance wire circular telegram, start the resistance wire, heat the bed stone, the bed stone is heated and is gradually changed to the hot melt state, it softens to be heated, can't provide sufficient holding power to the steel box girder, the steel box girder slowly falls, until falling to the beam-ends support on, the beam-ends support supports the steel box girder, in the bed stone heating process, artifical supplementary sulphur mortar to the hot melt is cleared up, after the steel box girder of bridge side span was supported to the beam-ends support, support piece and roller bearing were taken off, and clear up remaining sulphur mortar.
Adopt the slip auxiliary device of this embodiment, when the steel box roof beam of midspan part of bridge fell the roof beam construction, because slip auxiliary device's supporting role, the beam-ends support does not contact with the steel box roof beam of sidespan, the longitudinal movement of the steel box roof beam of sidespan can not lead to the fact vertical shearing to destroy to the beam-ends support, after the roof beam construction of falling is accomplished, the stone setting heating changes the hot melt state into, become soft, can make the steel box roof beam slowly fall to the beam-ends support on, convenient construction, construction efficiency is improved, the engineering time is saved, and good engineering economy is realized.
Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.
Claims (6)
1. The utility model provides a roof beam construction end beam that falls slides auxiliary device, its characterized in that, its highly be greater than the beam-ends support height including can fixing the bed stone in abutment upper beam-ends support both sides, bury in the bed stone and have the heating member, the heating member can heat to the hot melt state to the bed stone, the bed stone top surface is fixed with support piece, and the support piece top surface is provided with the recess, is provided with a plurality of roller bearings in the recess, and the roller bearing can roll along the longitudinal direction of bridge in the recess, and the diameter of roller bearing is greater than the depth of groove setting.
2. The sliding auxiliary device for an end beam in beam falling construction of claim 1, wherein the pad stone is cast by sulfur mortar.
3. The beam falling construction end beam sliding auxiliary device as claimed in claim 1, wherein the heating element is a resistance wire.
4. The sliding assistance device for an end beam in beam falling construction according to claim 1, wherein a plurality of rollers are arranged along a length direction of the groove, the length direction of the groove is parallel to a longitudinal direction of the bridge, and axes of the rollers are arranged perpendicular to the longitudinal direction of the bridge.
5. The sliding auxiliary device for the end beam in beam falling construction as claimed in claim 1, wherein the supporting member is of a rectangular parallelepiped structure, is made of steel, and has a groove on the top surface.
6. The sliding assistance device for an end beam in beam falling construction according to claim 5, wherein the side surface of the support member parallel to the longitudinal direction of the bridge is marked with graduation marks for measuring the longitudinal sliding distance of the beam end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922162818.4U CN211228171U (en) | 2019-12-04 | 2019-12-04 | Beam end sliding auxiliary device for beam falling construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922162818.4U CN211228171U (en) | 2019-12-04 | 2019-12-04 | Beam end sliding auxiliary device for beam falling construction |
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| Publication Number | Publication Date |
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| CN211228171U true CN211228171U (en) | 2020-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922162818.4U Active CN211228171U (en) | 2019-12-04 | 2019-12-04 | Beam end sliding auxiliary device for beam falling construction |
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