CN112854007A - Construction method of bridge deck steel bar protection layer - Google Patents
Construction method of bridge deck steel bar protection layer Download PDFInfo
- Publication number
- CN112854007A CN112854007A CN202110223585.3A CN202110223585A CN112854007A CN 112854007 A CN112854007 A CN 112854007A CN 202110223585 A CN202110223585 A CN 202110223585A CN 112854007 A CN112854007 A CN 112854007A
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- Prior art keywords
- reinforcing
- steel bar
- protection layer
- bridge deck
- bars
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 57
- 239000010959 steel Substances 0.000 title claims abstract description 57
- 238000010276 construction Methods 0.000 title claims abstract description 14
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 84
- 238000000034 method Methods 0.000 claims abstract description 15
- 230000007246 mechanism Effects 0.000 claims abstract description 10
- 230000008569 process Effects 0.000 claims abstract description 4
- 239000010410 layer Substances 0.000 claims description 28
- 239000011241 protective layer Substances 0.000 claims description 20
- 238000005096 rolling process Methods 0.000 claims description 11
- 230000008093 supporting effect Effects 0.000 claims description 10
- 239000000725 suspension Substances 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000004888 barrier function Effects 0.000 claims description 2
- 239000000758 substrate Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims 1
- 239000007921 spray Substances 0.000 claims 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 23
- 210000002414 leg Anatomy 0.000 description 6
- 230000002787 reinforcement Effects 0.000 description 6
- 210000002435 tendon Anatomy 0.000 description 3
- 238000005507 spraying Methods 0.000 description 2
- 238000009435 building construction Methods 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Images
Classifications
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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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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to a construction method of a bridge deck steel bar protection layer, which comprises a concrete base layer, a calibration mechanism and a steel bar protection layer, wherein the calibration mechanism comprises a rack and a reference lath, two sides of the concrete base layer along the width direction of a bridge are respectively provided with an elevation band of a concrete structure extending along the length direction of the bridge, the steel bar protection layer is positioned between the elevation bands of two days, two ends of the rack are supported on the elevation bands to move along the length direction of the bridge deck, a gap between the upper surface of the steel bar protection layer and the reference lath is observed in the moving process to judge whether the steel bar protection layer generates a depression, when the steel bar protection layer generates the depression, the depression part is fixed after the depression depth is increased to meet the requirement, and the depression part is kept in a. The method has the advantages of conveniently knowing the flatness of the reinforcing mesh and correcting the flatness, and solves the problem that the flatness and the correction of the reinforcing mesh of the surface reinforcing bar protection layer cannot be conveniently known.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a construction method of a bridge deck steel bar protection layer.
Background
In the bridge construction process, the bridge engineering concrete bridge deck pavement reinforcing bars mostly adopt 10cm x 10cm cold rolling ribbed shaped reinforcing bar net piece, relate to the vertical and horizontal overlap joint of reinforcing bar net piece, the ligature overlap joint of net piece and pre-buried shear bar and with crashproof guardrail reinforcing bar overlap joint technology during installation and construction, including constructor inevitable walking tramples simultaneously, very easily cause reinforcing bar protective layer thickness deviation, and then influence bridge floor bearing capacity and durability. Particularly, with the increase of traffic demands, the construction of a multi-lane (six-lane and eight-lane) bridge becomes a normal state, the difficulty of controlling the pavement elevation and the gradient of a concrete bridge is increased with the increase of the width of the bridge, particularly, when a conventional elevation measuring method is adopted, the work efficiency is low, and the walking and treading of personnel on the reinforcing mesh can easily cause the height fluctuation of the reinforcing mesh, so that the thickness of a protective layer is directly influenced, and the pavement quality of the concrete bridge is influenced.
Disclosure of Invention
The invention provides a construction method of a steel bar mesh deck steel bar protection layer, which can conveniently know the flatness of a steel bar mesh and correct the flatness, and solves the problem that the flatness of the steel bar mesh of a surface steel bar protection layer cannot be conveniently known and corrected.
The technical problem is solved by the following technical scheme: the utility model provides a bridge floor steel bar protective layer construction method, includes concrete-based layer, examines school mechanism and sets up the steel bar protective layer on concrete-based layer, examine the school mechanism and include the frame, the frame rigid coupling has the benchmark lath, respectively sets up the elevation area of a concrete structure that extends along bridge length direction in concrete-based layer along bridge width direction's both sides, the steel bar protective layer is located two days between the elevation area, make the both ends of frame support and carry out along bridge floor length direction removal on the elevation area, the clearance between the observation steel bar protective layer upper surface and the benchmark lath is in order to judge whether the steel bar protective layer produces sunkenly, mentions the sunken degree of depth when the steel bar protective layer produces sunkenly on the sunken part and fixes the sunken part and make the sunken part keep in the state that the degree of depth meets the requirements.
Preferably, the reinforcing bar protecting layer comprises a plurality of inverted U-shaped reinforcing bar supporting legs with lower ends cast on the concrete base layer and a reinforcing bar net connected to the reinforcing bar supporting legs, wherein the reinforcing bar net comprises longitudinal reinforcing bars and transverse reinforcing bars which are crisscrossed and connected together, so that the recessed portion is maintained in a state of a desired depth by supporting the lower ends of the vertical reinforcing bar heads on the concrete base layer and welding the upper ends of the vertical reinforcing bar heads with the reinforcing bar net. It is convenient and feasible to keep the concave portion in a state where the depth is as required.
Preferably, the machine frame is rotatably connected with a rolling roller; when the two ends of the rack are supported on the concrete barrier strips, one end of the axis of the rolling roller extends to the other end along the width direction of the bridge deck, the rolling roller is supported on the plane where the reinforcing mesh is located, and when the rack travels along the length direction of the bridge deck, the rolling roller rolls the reinforcing mesh so as to press down the protruding part of the reinforcing mesh to enable the reinforcing mesh to be flat. The phenomenon that the reinforcing steel bar protective layer protrudes upwards can be eliminated.
Preferably, the calibration mechanism travels on the rail with the reference strip in front of the rear crushing roller. The reference lath can be prevented from being damaged by the projection.
Preferably, the reference lath is provided with an electromagnet for adsorbing the reinforcing steel bar net to lift the concave part of the reinforcing steel bar net, when the depth of the concave part of the reinforcing steel bar net is greater than a set value, the reference lath is stopped above the concave part, the electromagnet is started to suck the concave part, the reinforcing steel bar head is inserted into the concave part until the lower end of the reinforcing steel bar head is supported on the concrete substrate, then the upper end of the reinforcing steel bar head is welded with the reinforcing steel bar net, after welding, the electromagnet is switched off, and the machine frame is enabled to move forwards continuously. So that the lifting of the recess is facilitated.
Preferably, the rack is provided with a walking trolley, the walking trolley is provided with a steel bar coil suspension shaft and a cutting machine, the cutting machine comprises a cutting blade and a cutting motor for driving the cutting blade to rotate, a rotating shaft of the cutting blade is in a vertical state, the cutting blade is located below the reference lath, the steel bar coil is suspended on the steel bar coil suspension shaft, the electromagnet sucks up the concave part, then loosens the steel bars on the steel bar coil to the head of the steel bars and supports the head of the steel bars on the concrete base layer, then welds the steel bars and the steel bar mesh together, moves the walking trolley along the width direction of the bridge floor and starts the cutting motor to enable the cutting blade to pass through the steel bars to cut the steel bars, and the steel bars are cut to form the steel bar head. A method and apparatus for forming a tendon head is provided.
Preferably, the reference lath is provided with a plurality of through holes, and the steel bar is inserted into the concrete base layer through the through holes above the concave part. Can provide the supporting effect of the reinforcing steel bar head.
Preferably, the rack is provided with a limit groove extending along the width direction of the bridge deck, the walking trolley is provided with trolley part walking wheels, and the trolley part walking wheels are located in the limit groove. The travelling trolley can be prevented from walking to cause that the steel bars cannot be accurately cut, and the convenience and the reliability in cutting are realized.
Preferably, after the tendon heads are welded, the bent portions of the mesh reinforcement where the recessed portions are formed are heated and softened, and then cooled, so that the elasticity of the bent portions is eliminated to reduce the stress on the welded portions of the tendon heads and the mesh reinforcement. The reliability at the corresponding height can be maintained by the mesh reinforcement.
Preferably, the cooling is performed by water spraying. The rigidity of the reinforcing mesh can be improved.
Preferably, the frame is provided with a frame part walking wheel, and the frame is supported on the elevation belt through the walking wheel.
The invention has the following advantages: the elevation belt is arranged to support and move the reference plate strip so as to detect the flatness of the reinforcing mesh, and whether the reinforcing mesh is sunken or not can be conveniently known; the elevation belt can be used as a template for the subsequent concrete pouring of the covering reinforcing steel bar protective layer, so that the concrete pouring is convenient; the reinforcing bar net is fixed on pre-buried supporting legs for the reinforcing bar net is fixed reliable, thereby makes to fix the reinforcing bar net after the levelling through the reinforcing bar head and prevents to realize.
Drawings
FIG. 1 is a schematic illustration of the present invention during its construction;
fig. 2 is a partially enlarged view of a portion a of fig. 1.
In the figure: concrete base 1, elevation area 2, frame 3, frame portion walking wheel 4, benchmark lath 5, roller 6, reinforcing bar supporting legs 7, longitudinal reinforcement 8, horizontal reinforcing bar 9, walking dolly 10, reinforcing bar book hanging shaft 11, cutting piece 12, cutting motor 13, spacing groove 14, dolly portion walking wheel 15, via hole 16, vertical reinforcing bar head 17, reinforcing bar book hang 18, reinforcing bar 19.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and 2, a bridge deck steel bar protection layer construction method includes a concrete base layer 1, a calibration mechanism and a steel bar protection layer arranged on the concrete base layer. And two sides of the concrete base layer along the width direction of the bridge are respectively provided with an elevation band 2 of the concrete structure extending along the length direction of the bridge. The calibration mechanism comprises a frame 3. Both ends of the frame are provided with frame part walking wheels 4. The frame and the travelling wheels are supported on the elevation belt to move. The frame is fixedly connected with a reference lath 5 and a rolling roller 6 in a rotating connection. The reinforcing bar protective layer is located two days between the elevation area, the reinforcing bar protective layer includes that the lower extreme pours a plurality of reinforcing bar supporting legss 7 of the type of falling U of concrete-base and connects the reinforcing bar net on the reinforcing bar supporting legss, and the reinforcing bar net includes vertical reinforcement 8 and the transverse reinforcement 9 that vertically and horizontally staggered links together. The frame is provided with a walking trolley 10, and particularly the walking trolley is arranged on the reference lath. Be equipped with reinforcing bar book suspension axis 11 and cutting machine on the walking dolly, the cutting machine includes cutting piece 12 and drive cutting piece pivoted cutting motor 13, and the pivot of cutting piece is in vertical state, and the cutting piece is located the below of benchmark lath. The reference lath is provided with a limit groove 14 extending along the width direction of the bridge floor, the walking trolley is provided with a trolley part walking wheel 15, and the trolley part walking wheel is positioned in the limit groove. The reference lath is provided with a plurality of through holes 16. The reference lath is provided with an electromagnet for adsorbing the reinforcing mesh so as to lift the concave part of the reinforcing mesh.
The two ends of the rack are supported on the elevation belt through the rack walking wheels to move along the length direction of the bridge deck, specifically, the calibration mechanism walks on the track in a mode that the reference lath is in front of the rolling roller at the back, one end of the axis of the rolling roller in the width direction of the bridge deck extends to the other end, the rolling roller is supported on the plane where the reinforcing mesh is located to roll the reinforcing mesh, so that the convex part of the reinforcing mesh is pressed down to enable the reinforcing mesh to be flat, the gap between the upper surface of the reinforcing protective layer and the reference lath is observed in the moving process to judge whether the reinforcing protective layer generates the depression, and when the reinforcing protective layer generates the depression, the depression depth is referred to the depression depth to meet the requirement, and then the depression part is fixed to enable the. The recessed portion is maintained at a desired depth by supporting the vertical reinforcing heads 17 on the concrete base at their lower ends and welding the upper ends to the reinforcing mesh.
Specifically, the method comprises the following steps: hanging a reinforcing steel bar roll suspension 18 on a reinforcing steel bar roll suspension shaft, stopping a reference batten above a concave part when the depth of the concave part of the reinforcing steel bar net is larger than a set value, starting an electromagnet to suck the concave part, scattering reinforcing steel bars 19 on the reinforcing steel bar roll to the head of the reinforcing steel bars, inserting the heads of the reinforcing steel bars into the concrete base layer through holes above the concave part, then welding the reinforcing steel bars and the reinforcing steel bar net together, cutting the reinforcing steel bars by moving the walking trolley along the width direction of the bridge floor and starting a cutting motor to enable cutting pieces to pass through the reinforcing steel bars, and cutting the reinforcing steel bars to form reinforcing steel bar heads. After the reinforcing bar heads are welded, the bent parts of the reinforcing bar net which form the concave parts are heated and softened and then cooled, so that the elasticity of the bent parts is eliminated, and the stress of the welded parts of the reinforcing bar heads and the reinforcing bar net is reduced. The cooling is performed by spraying water.
Claims (10)
1. A construction method of a bridge deck steel bar protective layer comprises a concrete base layer and a steel bar protective layer arranged on the concrete base layer, it is characterized by also comprising a calibration mechanism, the calibration mechanism comprises a frame, a reference lath is fixedly connected with the frame, two sides of the concrete base layer along the width direction of the bridge are respectively provided with an elevation belt of the concrete structure extending along the length direction of the bridge, the steel bar protection layer is located two days between the elevation area, make the both ends of frame support and be in the removal of bridge floor length direction is gone up to the elevation area, and the clearance between the observation steel bar protection layer upper surface and the benchmark lath is in order to judge in the removal process whether the steel bar protection layer produces sunkenly, fixes the sunk part and makes the sunk part keep in the state that the degree of depth meets the requirements after mentioning the sunk depth and meeting the requirements on the sunk part when the steel bar protection layer produces sunkenly.
2. A method according to claim 1 wherein the protective layer of reinforcing bars comprises a plurality of inverted U-shaped support bars having lower ends cast on the concrete base and a reinforcing mesh connected to the support bars, the reinforcing mesh comprising longitudinal reinforcing bars and transverse reinforcing bars connected to each other in a criss-cross pattern, such that the recesses are maintained at a desired depth by supporting the lower ends of the vertical bar heads on the concrete base and welding the upper ends of the vertical bar heads to the reinforcing mesh.
3. The method of claim 2, wherein the frame is rotatably connected to a roller; when the two ends of the rack are supported on the concrete barrier strips, one end of the axis of the rolling roller extends to the other end along the width direction of the bridge deck, the rolling roller is supported on the plane where the reinforcing mesh is located, and when the rack travels along the length direction of the bridge deck, the rolling roller rolls the reinforcing mesh so as to press down the protruding part of the reinforcing mesh to enable the reinforcing mesh to be flat.
4. A method of constructing a deck reinforcing cover according to claim 3, wherein said calibration means travels on said track with said reference strip in front of a rear roller.
5. A method for constructing a protective layer on a bridge deck reinforcing bar according to claim 1, 2, 3 or 4, wherein the reference lath is provided with an electromagnet for attracting the reinforcing bar net to lift the concave part of the reinforcing bar net, when the depth of the concave part of the reinforcing bar net is greater than a predetermined value, the reference lath is stopped above the concave part, the electromagnet is turned on to suck the concave part, the reinforcing bar head is inserted into the concave part until the lower end of the reinforcing bar head is supported on the concrete substrate, then the upper end of the reinforcing bar head is welded with the reinforcing bar net, and after welding, the electromagnet is turned off and the frame is moved forward.
6. The bridge deck steel bar protection layer construction method according to claim 1, 2, 3 or 4, wherein a traveling trolley is arranged on the frame, a steel bar coil suspension shaft and a cutting machine are arranged on the traveling trolley, the cutting machine comprises a cutting piece and a cutting motor driving the cutting piece to rotate, a rotating shaft of the cutting piece is in a vertical state, the cutting piece is located below the reference lath, the steel bar coil is suspended on the steel bar coil suspension shaft, the electromagnet sucks up the concave part, then disperses the steel bars on the steel bar coil to the heads of the steel bars and supports the heads on the concrete base layer, then welds the steel bars and the steel bar mesh together, cuts the steel bars by moving the traveling trolley along the width direction of the bridge deck and starting the cutting motor to enable the cutting piece to pass through the steel bars, and the steel bars are cut to form the steel bar heads.
7. A method according to claim 6, wherein said datum rail is provided with a plurality of through holes, and said reinforcing bars are inserted through said through holes above said recessed portions and onto said concrete base.
8. The construction method of the bridge deck steel bar protection layer according to claim 6, wherein the frame is provided with a limit groove extending along the width direction of the bridge deck, the walking trolley is provided with trolley walking wheels, and the trolley walking wheels are located in the limit groove.
9. A method for constructing a protective layer of reinforcing bars on a bridge deck according to claim 2, 3 or 4, wherein after the reinforcing heads are welded, the bent portions of the reinforcing mesh where the recessed portions are formed are softened by heating and then cooled, thereby eliminating the elastic force at the bent portions to reduce the stress at the welded portions of the reinforcing heads and the reinforcing mesh.
10. A method according to claim 9 wherein said cooling is by water spray.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110223585.3A CN112854007A (en) | 2021-03-01 | 2021-03-01 | Construction method of bridge deck steel bar protection layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110223585.3A CN112854007A (en) | 2021-03-01 | 2021-03-01 | Construction method of bridge deck steel bar protection layer |
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| CN112854007A true CN112854007A (en) | 2021-05-28 |
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| CN202110223585.3A Pending CN112854007A (en) | 2021-03-01 | 2021-03-01 | Construction method of bridge deck steel bar protection layer |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006265899A (en) * | 2005-03-23 | 2006-10-05 | Daimei Kk | Scaffolding construction method |
| CN103382699A (en) * | 2013-07-03 | 2013-11-06 | 天津城建大学 | Construction method for bridge deck pavement layer on steel bridge |
| CN105401520A (en) * | 2015-12-25 | 2016-03-16 | 广东冠粤路桥有限公司 | Integrated layer whole-width construction device for light truss type bridge and construction method of construction device |
| CN205152790U (en) * | 2015-11-25 | 2016-04-13 | 中铁二十局集团第一工程有限公司 | Concrete bridge face and pavement construction are supported and stop device with reinforcing bar net piece |
| CN207176511U (en) * | 2017-08-26 | 2018-04-03 | 河南省公路工程局集团有限公司 | The leveling tool of deck paving bar-mat reinforcement |
| CN207760740U (en) * | 2018-01-17 | 2018-08-24 | 杭州市交通工程集团有限公司 | Deck paving cover to reinforcement examines purlin vehicle |
| CN112144414A (en) * | 2020-09-29 | 2020-12-29 | 江西省地质工程(集团)公司 | Construction method for embedded ribs of small box girder top plate |
-
2021
- 2021-03-01 CN CN202110223585.3A patent/CN112854007A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006265899A (en) * | 2005-03-23 | 2006-10-05 | Daimei Kk | Scaffolding construction method |
| CN103382699A (en) * | 2013-07-03 | 2013-11-06 | 天津城建大学 | Construction method for bridge deck pavement layer on steel bridge |
| CN205152790U (en) * | 2015-11-25 | 2016-04-13 | 中铁二十局集团第一工程有限公司 | Concrete bridge face and pavement construction are supported and stop device with reinforcing bar net piece |
| CN105401520A (en) * | 2015-12-25 | 2016-03-16 | 广东冠粤路桥有限公司 | Integrated layer whole-width construction device for light truss type bridge and construction method of construction device |
| CN207176511U (en) * | 2017-08-26 | 2018-04-03 | 河南省公路工程局集团有限公司 | The leveling tool of deck paving bar-mat reinforcement |
| CN207760740U (en) * | 2018-01-17 | 2018-08-24 | 杭州市交通工程集团有限公司 | Deck paving cover to reinforcement examines purlin vehicle |
| CN112144414A (en) * | 2020-09-29 | 2020-12-29 | 江西省地质工程(集团)公司 | Construction method for embedded ribs of small box girder top plate |
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Application publication date: 20210528 |