CN107654085A - A kind of method for reinforcing H-shaped girder steel and more Span Continuous steel Eurya plant bars - Google Patents
A kind of method for reinforcing H-shaped girder steel and more Span Continuous steel Eurya plant bars Download PDFInfo
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- CN107654085A CN107654085A CN201710853575.1A CN201710853575A CN107654085A CN 107654085 A CN107654085 A CN 107654085A CN 201710853575 A CN201710853575 A CN 201710853575A CN 107654085 A CN107654085 A CN 107654085A
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- steel
- bending
- shaped girder
- steel cable
- span centre
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 209
- 239000010959 steel Substances 0.000 title claims abstract description 209
- 241000610361 Eurya Species 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 21
- 238000005452 bending Methods 0.000 claims abstract description 86
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910052742 iron Inorganic materials 0.000 claims abstract description 11
- 239000000839 emulsion Substances 0.000 claims description 4
- 239000003351 stiffener Substances 0.000 claims description 4
- 238000007596 consolidation process Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 241000196324 Embryophyta Species 0.000 description 6
- 230000002787 reinforcement Effects 0.000 description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000035882 stress Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention discloses a kind of method for reinforcing H-shaped girder steel and more Span Continuous steel Eurya plant bars, at the both ends of H-shaped girder steel, overhang bracket backing plate is set, in the span centre bottom of H-shaped girder steel, one piece or two pieces of span centre bearing plates are set, two overhang bracket backing plates connect one end of non-bending steel cable by single hole anchor device respectively, the span centre turning point support of non-bending steel cable applies prestressing force in the downside of span centre bearing plate, to non-bending steel cable.In the span centre bottom of two adjacent steel Eurya plant bars, a piece steel rest is set, bridle iron is set on the top surface of H-shaped girder steel, the bridle iron of two ends connects one end of non-bending steel cable by single hole anchor device respectively, the span centre turning point support of non-bending steel cable is in the downside of steel rest, non-bending steel cable rides over the upside of remaining bridle iron, non-bending steel cable is formed continuous two broken line shape of multispan, prestressing force is applied to non-bending steel cable.The present invention has the advantages of operating expenses is low, consolidation effect is good, small to normal Influence of production.
Description
Technical field
The present invention relates to steel structural plant roof reinforcement technique field, and H-shaped girder steel and multispan are reinforced more particularly to one kind
The method of continuous steel Eurya plant bar.
Background technology
H-shaped girder steel and more Span Continuous steel Eurya plant bars are the main bearing members that steel-structure factory building bears roof load.Its feature
That component span is big, roof load is light, with bear roofing deadweight and snow load based on.The safety stock of this structure is smaller,
Often it is required for carrying out consolidation process to H-shaped girder steel and more Span Continuous steel Eurya plant bars when roof load increase.
Country is wideling popularize photovoltaic generation project now, and the existing a large amount of structural steel industrial building roofings in China are very suitable
For doing photovoltaic generation.The problem of this just makes the H-shaped girder steel of steel-structure factory building and more Span Continuous steel Eurya plant bars how to reinforce is more urgent
Compel.
Traditional reinforcement technique is mainly increasing section method for strengthening, i.e., increases cutting for steel member with the method for steel bonding or welding
Face.But because the span of component is big, quantity is more, it is often higher to reinforce expense；And the method for welding is to normal Influence of production
Bigger, the method organic gel of steel bonding wants aging, and service life is short, and processing of preventing fires is difficult.
The content of the invention
It is above-mentioned existing to solve it is an object of the invention to provide a kind of method for reinforcing H-shaped girder steel and more Span Continuous steel Eurya plant bars
The problem of with the presence of technology, the reinforcing expense of H-shaped girder steel and more Span Continuous steel Eurya plant bars is reduced, and accelerate speed of application, reduction pair
The influence normally produced.
To achieve the above object, the invention provides following scheme：
The invention provides a kind of method for reinforcing H-shaped girder steel, and overhang bracket backing plate is set at the both ends of H-shaped girder steel,
The span centre bottom of the H-shaped girder steel sets one piece or two pieces of span centre bearing plates, and two overhang bracket backing plates pass through respectively
Single hole anchor device connects one end of non-bending steel cable, and the span centre turning point support of the non-bending steel cable is in the span centre support pads
The downside of plate, non-bending steel cable is formed two broken lines or tri linear shape, prestressing force is applied to the non-bending steel cable, made
The non-bending steel cable produces upward counter-force at the span centre bearing plate, reverse bending moment is formed, to balance the H
Shape girder steel needs the moment of flexure supplied.
Preferably, the quantity of the span centre bearing plate is one piece, is arranged on the bottom surface of the H-shaped girder steel, is made described
Non-bending steel cable forms two broken line shapes.
Preferably, the quantity of the span centre bearing plate is two pieces, the non-bending steel cable is formed tri linear shape.
Preferably, when the H-shaped girder steel is multispan consecutive hours, in being set on the top surface of the H-shaped girder steel at the middle bearing
Bearing support backing plate, and the non-bending steel cable is ridden over to the upside of the middle bearing support backing plate, make the soap-free emulsion polymeization steel
Twisted wire forms the continuous tri linear of multispan or two broken line shapes.
Preferably, the H-shaped girder steel supports with the overhang bracket backing plate, the middle bearing support backing plate and the span centre
The side of web corresponding to backing plate is provided with stiffener.
Preferably, the single hole anchor device is the clip type single hole anchor device of round buss three.
Preferably, the non-bending steel cable uses u φj15.2 underrelaxation non-bending steel cables, application it is described it is pre- should
The size of power is no more than the 75% of the non-bending steel cable ultimate tension.
Preferably, the non-bending steel cable is at least two.
Present invention also offers a kind of method for reinforcing more Span Continuous steel Eurya plant bars, the more Span Continuous of steel Eurya plant bar are shelved on H side by side
On the top surface of shape girder steel, a piece steel rest is set in the span centre bottom of two adjacent steel Eurya plant bars, in the H-shaped girder steel
Bridle iron is set on top surface, the bridle iron of two ends connects one end of non-bending steel cable by single hole anchor device respectively,
For the span centre turning point support of the non-bending steel cable in the downside of the steel rest, the non-bending steel cable rides over remaining institute
The upside of bridle iron is stated, the non-bending steel cable is formed continuous two broken line shape of multispan, to the non-bending steel cable
Apply prestressing force, the non-bending steel cable is produced upward counter-force at the steel rest, form reverse bending moment, to flat
Weighing apparatus steel Eurya plant bar needs the moment of flexure supplied.
The present invention achieves following technique effect relative to prior art：
For the present invention by using two broken line shapes or the non-bending steel cable of tri linear shape, applying prestressing force later can
Upward counter-force is produced in span centre turning point, forms reverse bending moment, to balance after steel structural plant roof increase load to H-shaped steel
Moment of flexure caused by beam and more Span Continuous steel Eurya plant bars, reach the purpose of reinforcing steel structural plant roof structure.The present invention has
Operating expenses is low, consolidation effect is good, it is small to normal Influence of production the advantages of.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
The accompanying drawing needed to use is briefly described.It should be evident that drawings in the following description are only some implementations of the present invention
Example, for those of ordinary skill in the art, on the premise of not paying creative work, can also be obtained according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is the schematic diagram for the method that the present invention reinforces H-shaped girder steel；
Fig. 2 is the schematic diagram for the method that the present invention reinforces more Span Continuous steel Eurya plant bars；
Fig. 3 is the schematic cross-sectional view in A-A faces in Fig. 2；
Wherein：1-H shape girder steels, 2- overhang bracket backing plates, 3- span centre bearing plates, 4- non-bending steel cables, 5- single hole anchors
Have, bearing in 6-, bearing support backing plate in 7-, 8- stiffeners, 9- steel Eurya plant bars, 10- steel rests, 11- bridle irons.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
It is above-mentioned existing to solve it is an object of the invention to provide a kind of method for reinforcing H-shaped girder steel and more Span Continuous steel Eurya plant bars
The problem of with the presence of technology, the reinforcing expense of H-shaped girder steel and more Span Continuous steel Eurya plant bars is reduced, and accelerate speed of application, reduction pair
The influence normally produced.
In order to facilitate the understanding of the purposes, features and advantages of the present invention, it is below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is further detailed explanation.
Explanation of technical terms：
1) prestressing force：It is previously applied stress.
2) external prestressing：Stress is previously applied outside component.
3) non-bending steel cable：It is yellow by the wire harness of several high tensile steel wires strand together, overcoat plastic bushing, the interior filling of sleeve pipe
Oil, wire harness can slidably in sleeve pipe, and will not corrosion.
4) single hole anchor device：Single non-bending steel cable is fixed on other components after applying stress with it, steel strand wires
Pulling force be delivered to other components up.
5) bearing plate：The ironware that concentrated force suffered by end anchorage is passed on H-shaped girder steel overhang bracket face.
6) span centre bearing plate：Upward power caused by steel strand wires is transmitted to H-shaped girder steel by span centre non-bending steel cable turning point
Ironware on the bearing-surface of bottom surface.
7) bearing support backing plate in：When the girder steel of reinforcing is multispan consecutive hours, the bearing plate of middle holder top is located at, will
The downward force of non-bending steel cable is transmitted to the ironware on H-shaped girder steel top surface bearing-surface.
8) steel rest：Hold in the palm in the bottom of two adjacent steel Eurya plant bars, upward power caused by steel strand wires is passed to adjacent steel Eurya plant
The rod member of bar.
Embodiment 1：As shown in figure 1, a kind of method for reinforcing H-shaped girder steel is present embodiments provided, the two of H-shaped girder steel 1
End sets overhang bracket backing plate 2, and one piece or two pieces of span centre bearing plates 3, two ends are set in the span centre bottom of H-shaped girder steel 1
Bearing plate 2 connects one end of non-bending steel cable 4, the span centre turning point support of non-bending steel cable 4 by single hole anchor device 5 respectively
In the downside of span centre bearing plate 3.When the quantity of span centre bearing plate 3 is one piece, span centre bearing plate 3 is arranged on H-shaped steel
On the bottom surface of the span centre of beam 1, non-bending steel cable 4 is set to form two broken line shapes；When the quantity of span centre bearing plate 3 is two pieces,
The bottom surface of H-shaped girder steel 1 is symmetricly set on, non-bending steel cable 4 is formed tri linear shape.Single hole anchor device 5 is preferably round buss
Three clip type single hole anchor devices, non-bending steel cable 4 preferentially use u φj15.2 underrelaxation non-bending steel cable.Soap-free emulsion polymeization steel is twisted
Line 4 applies prestressing force, preferably external prestressing, and prestressed size is no more than the ultimate tensile strength of non-bending steel cable 4
75%, non-bending steel cable 4 is produced upward counter-force at span centre bearing plate 3, reverse bending moment is formed, to balance H-shaped
Girder steel 1 needs the moment of flexure supplied, and the pulling force on non-bending steel cable 4 preferably passes to H-shaped girder steel 1 by overhang bracket backing plate 2,
The quantity of non-bending steel cable 4 need to be depending on the size of reverse bending moment to be provided, by adjusting non-bending steel cable 4
Difference in height can adjust the size of reverse bending moment.
When H-shaped girder steel 1 is multispan consecutive hours, bearing support backing plate in being set on the top surface of H-shaped girder steel 1 at the middle bearing 6
7, and non-bending steel cable 4 is ridden over to the upside of middle bearing support backing plate 7, non-bending steel cable 4 is formed multispan continuous three
Broken line or two broken line shapes, it can be achieved the component of non-bending steel cable 4 vertically passing to middle bearing 6.H-shaped girder steel 1
Stiffener 8 is provided with the side of 3 corresponding web of overhang bracket backing plate 2, middle bearing support backing plate 7 and span centre bearing plate.
The present embodiment applies prestressing force and turned to later in span centre by using the non-bending steel cable 4 in tri linear shape
Place can produce upward counter-force, act on the bottom surface of H-shaped girder steel 1, form reverse bending moment, increase to balance steel structural plant roof
Loading carry after to moment of flexure caused by H-shaped girder steel 1, reach the purpose of reinforcing steel structural plant roof.The present embodiment, which has, to be applied
Expenses of labour with it is low, consolidation effect is good, without bonding, welding capacity is small, small to normal Influence of production the advantages of.
Embodiment 2：As shown in Figures 2 and 3, a kind of method for reinforcing more Span Continuous steel Eurya plant bars, steel are present embodiments provided
Eurya plant bar 9 is usually C-shaped steel Eurya plant bar, and steel Eurya plant bar Span Continuous more than 9 is shelved on the top surface of H-shaped girder steel 1 side by side, in two adjacent steel
The span centre bottom of Eurya plant bar 9 sets a steel rest 10, and bridle iron 11, the steel branch of two ends are set on the top surface of H-shaped girder steel 1
Seat 11 connects one end of non-bending steel cable 4 by single hole anchor device 5 respectively, and the span centre turning point support of non-bending steel cable 4 is in steel
The downside of rest 10, non-bending steel cable 4 ride over the upside of remaining bridle iron 11, non-bending steel cable 4 is formed more bridgings
Two continuous broken line shapes, the preferably clip type single hole anchor device of round buss three of single hole anchor device 5, the preferred u φ of non-bending steel cable 4j15.2 underrelaxation non-bending steel cable.Apply prestressing force, preferably external prestressing to non-bending steel cable 4, it is prestressed big
It is small no more than the ultimate tensile strength of non-bending steel cable 4 75%, non-bending steel cable 4 is produced at steel rest 10 upward
Counter-force, reverse bending moment is formed, the moment of flexure supplied to balance steel Eurya plant bar 9 to need.Pulling force on non-bending steel cable 4 preferably passes through
Bridle iron 11 passes to H-shaped girder steel.
The present embodiment applies prestressing force and turned to later in span centre by using the non-bending steel cable 4 in two broken line shapes
Steel rest 10 at can produce upward counter-force, act on the bottom surface of steel Eurya plant bar 9, reverse bending moment formed, to balance steel construction
To moment of flexure caused by steel Eurya plant bar 9 after factory building roof increase load, reach the purpose of reinforcing steel structural plant roof.This implementation
Example has the advantages of operating expenses is low, consolidation effect is good, small to normal Influence of production.
It should be noted that：H-shaped girder steel and steel Eurya plant bar can use two fold-line-shapeds or the soap-free emulsion polymeization steel of tri linear shape to twist
Line reinforcement means；The reinforcement means of the present invention is applied to reinforce the girder steel and steel Eurya plant bar of various cross sectional shapes, girder steel and steel Eurya plant bar
Cross sectional shape should not be construed as limiting the invention.
Apply specific case in this specification to be set forth the principle and embodiment of the present invention, above example
Explanation be only intended to help understand the present invention method and its core concept；Meanwhile for those of ordinary skill in the art,
According to the thought of the present invention, in specific embodiments and applications there will be changes.In summary, in this specification
Appearance should not be construed as limiting the invention.
Claims (9)
- A kind of 1. method for reinforcing H-shaped girder steel, it is characterised in that：Overhang bracket backing plate is set at the both ends of H-shaped girder steel, described The span centre bottom of H-shaped girder steel sets one piece or two pieces of span centre bearing plates, and two overhang bracket backing plates pass through single hole respectively Anchorage connects one end of non-bending steel cable, and the span centre turning point support of the non-bending steel cable is in the span centre bearing plate Downside, non-bending steel cable is formed two broken lines or tri linear shape, prestressing force is applied to the non-bending steel cable, make described Non-bending steel cable produces upward counter-force at the span centre bearing plate, reverse bending moment is formed, to balance the H-shaped steel Beam needs the moment of flexure supplied.
- 2. the method according to claim 1 for reinforcing H-shaped girder steel, it is characterised in that：The quantity of the span centre bearing plate For one piece, it is arranged on the bottom surface in the middle part of the H-shaped girder steel, the non-bending steel cable is formed two broken line shapes.
- 3. the method according to claim 1 for reinforcing H-shaped girder steel, it is characterised in that：The quantity of the span centre bearing plate For two pieces, the non-bending steel cable is set to form tri linear shape.
- 4. the method according to any one of claim 1 to 3 for reinforcing H-shaped girder steel, it is characterised in that：When the H-shaped steel Beam is multispan consecutive hours, bearing support backing plate in being set on the top surface of the H-shaped girder steel at the middle bearing, and by the soap-free emulsion polymeization Steel strand wires ride over the upside of the middle bearing support backing plate, the non-bending steel cable is formed the continuous tri linear of multispan or two Broken line shape.
- 5. the method according to claim 4 for reinforcing H-shaped girder steel, it is characterised in that：The H-shaped girder steel and the end branch The side of rim plate, the middle bearing support backing plate and web corresponding to the span centre bearing plate is provided with stiffener.
- 6. the method according to claim 1 for reinforcing H-shaped girder steel, it is characterised in that：The single hole anchor device is round buss list Hole anchorage.
- 7. the method according to claim 1 for reinforcing H-shaped girder steel, it is characterised in that：The non-bending steel cable uses u φj15.2 underrelaxation non-bending steel cables, the prestressed size of application are no more than the non-bending steel cable Ultimate Tensile The 75% of intensity.
- 8. the method according to claim 1 for reinforcing H-shaped girder steel, it is characterised in that：The non-bending steel cable is at least Two.
- A kind of 9. method for reinforcing more Span Continuous steel Eurya plant bars, it is characterised in that：The more Span Continuous of steel Eurya plant bar are shelved on H-shaped girder steel side by side Top surface on, two adjacent steel Eurya plant bars span centre bottom set a steel rest, on the top surface of the H-shaped girder steel Bridle iron is set, and the bridle iron of two ends connects one end of non-bending steel cable, the nothing by single hole anchor device respectively The span centre turning point support of steel strand wires is bonded in the downside of the steel rest, the non-bending steel cable rides over remaining described steel branch The upside of seat, the non-bending steel cable is formed continuous two broken line shape of multispan, the non-bending steel cable is applied pre- Stress, the non-bending steel cable is produced upward counter-force at the steel rest, reverse bending moment is formed, to balance steel Eurya plant Bar needs the moment of flexure supplied.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710853575.1A CN107654085B (en) | 2017-09-20 | 2017-09-20 | A method of reinforcing H-shaped girder steel and multispan continuous purline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710853575.1A CN107654085B (en) | 2017-09-20 | 2017-09-20 | A method of reinforcing H-shaped girder steel and multispan continuous purline |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107654085A true CN107654085A (en) | 2018-02-02 |
| CN107654085B CN107654085B (en) | 2019-11-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710853575.1A Expired - Fee Related CN107654085B (en) | 2017-09-20 | 2017-09-20 | A method of reinforcing H-shaped girder steel and multispan continuous purline |
Country Status (1)
| Country | Link |
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| CN (1) | CN107654085B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108824839A (en) * | 2018-08-29 | 2018-11-16 | 国网江苏省电力有限公司扬州供电分公司 | A kind of drag-line ruggedized construction of existing C-type steel purlin |
| CN109853980A (en) * | 2019-01-29 | 2019-06-07 | 广东庆余堂建筑科技有限公司 | The prestressed reinforcement device of Cracks On Concrete Floors closure |
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| KR100265697B1 (en) * | 1998-05-07 | 2000-09-15 | 한만엽 | Anchoring method and apparatus for improving end bearing structure in external prestress reinforcement |
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| CN201605825U (en) * | 2009-12-30 | 2010-10-13 | 贵阳铝镁设计研究院 | Steel beam reinforced structure |
| CN204152236U (en) * | 2014-08-27 | 2015-02-11 | 唐昌辉 | A kind of external prestressing strengthening device |
| CN104929381A (en) * | 2015-06-02 | 2015-09-23 | 项剑锋 | Steel-support non-cohesive steel strand lower support type prestress floor reinforcing method |
| CN205153241U (en) * | 2015-11-30 | 2016-04-13 | 华电重工股份有限公司 | Purlin structure, purlin combined system and roofing |
| CN105735653A (en) * | 2014-12-09 | 2016-07-06 | 东北林业大学 | Novel bamboo and wood continuous beam prestressing force exertion system |
| CN105781012A (en) * | 2016-05-12 | 2016-07-20 | 中建八局第建设有限公司 | Steel box girder external prestressed construction technology of civil building |
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2017
- 2017-09-20 CN CN201710853575.1A patent/CN107654085B/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100265697B1 (en) * | 1998-05-07 | 2000-09-15 | 한만엽 | Anchoring method and apparatus for improving end bearing structure in external prestress reinforcement |
| CN2916133Y (en) * | 2006-04-12 | 2007-06-27 | 永城煤电(集团)有限责任公司 | H-shape girder steel with reinforcement device |
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| CN105735653A (en) * | 2014-12-09 | 2016-07-06 | 东北林业大学 | Novel bamboo and wood continuous beam prestressing force exertion system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108824839A (en) * | 2018-08-29 | 2018-11-16 | 国网江苏省电力有限公司扬州供电分公司 | A kind of drag-line ruggedized construction of existing C-type steel purlin |
| CN108824839B (en) * | 2018-08-29 | 2023-11-24 | 国网江苏省电力有限公司扬州供电分公司 | Cable reinforcement structure of existing C-shaped steel purline |
| CN109853980A (en) * | 2019-01-29 | 2019-06-07 | 广东庆余堂建筑科技有限公司 | The prestressed reinforcement device of Cracks On Concrete Floors closure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107654085B (en) | 2019-11-01 |
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