CN110792032A - Steel hoop structure for additionally arranging steel bent cap on pier stand column and installation method - Google Patents
Steel hoop structure for additionally arranging steel bent cap on pier stand column and installation method Download PDFInfo
- Publication number
- CN110792032A CN110792032A CN201910968515.3A CN201910968515A CN110792032A CN 110792032 A CN110792032 A CN 110792032A CN 201910968515 A CN201910968515 A CN 201910968515A CN 110792032 A CN110792032 A CN 110792032A
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- CN
- China
- Prior art keywords
- steel
- installation method
- concrete
- upright post
- sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 187
- 239000010959 steel Substances 0.000 title claims abstract description 187
- 238000000034 method Methods 0.000 title claims description 26
- 238000009434 installation Methods 0.000 title claims description 20
- 239000011083 cement mortar Substances 0.000 claims abstract description 21
- 238000007788 roughening Methods 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000011440 grout Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000004570 mortar (masonry) Substances 0.000 description 4
- 239000003292 glue Substances 0.000 description 3
- 238000010008 shearing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
Abstract
The invention relates to a steel hoop structure for additionally arranging a steel bent cap on a pier upright post, wherein a steel sleeve is arranged around a concrete upright post, a gap is arranged between the steel sleeve and the concrete upright post, a cement mortar layer is arranged in the gap, so that the steel sleeve forms a steel hoop, and one or more steel members extending outwards are arranged outside the steel hoop to form the steel bent cap structure. Because high-strength cement mortar is poured between the steel anchor ear and the concrete upright post, the bearing capacity of the steel bent cap or the steel corbel is provided by utilizing the strong frictional resistance of the structure, and the purposes of simple structure, reliable connection, convenient construction and low cost are achieved.
Description
Technical Field
The invention relates to the technical field of reinforcing and rebuilding of bridge structures, in particular to a steel hoop structure for additionally arranging a steel capping beam on a pier column and an installation method, and particularly relates to an externally-added steel capping beam structure of a pier concrete column structure.
Background
At present, when a concrete upright post of a pier is reinforced or rebuilt, a steel structure capping beam or a bracket is additionally arranged, in the prior art, a steel sleeve is arranged around the upright post for manufacturing, then a shear resistant screw or an anchor bolt is planted, a gap between the steel sleeve and concrete is bonded by organic glue, and the steel capping beam is connected with an original concrete upright post into a whole through the shear resistant screw and a bonding layer to bear force together. However, due to manufacturing errors of the column structure and the steel structure, the steel sleeve and the concrete column cannot be closely attached, the glue layer is thick and thin, even a plurality of parts are hollow, the bonding force of organic glue is weak, the bonding effect is greatly reduced, the bearing capacity of the steel bent cap mainly depends on a shear-resistant screw or an anchor bolt, and the bearing capacity is relatively low.
And because a larger shearing force is born between the steel sleeve and the concrete upright column, the steel sleeve is one of key parts for force transmission. Therefore, it is necessary and urgent to find a connection structure for more effectively transferring shear force between the steel sleeve and the concrete column.
Disclosure of Invention
The invention aims to provide an improved steel hoop structure for additionally arranging a steel cover beam on a pier column and an installation method.
In order to achieve the purpose, the technical scheme of the invention is as follows: the utility model provides a steel staple bolt structure that is used for pier stand to add steel bent cap, its includes the concrete stand, its characterized in that: set up the steel sleeve around the concrete stand, be equipped with the clearance between steel sleeve and the concrete stand, be equipped with the cement mortar layer in the clearance for the steel sleeve forms the steel staple bolt, and the steel staple bolt outside sets up the steel member formation steel lid beam structure of one or more outside extensions.
Preferably, the gap is 15-30mm in size.
Further, the steel sleeve is made of a steel plate, a plurality of horizontally arranged shear key structures are welded on the inner side of the steel sleeve, and the shear key structures are made of thin steel bars or flat steel.
The utility model provides an installation method that is used for pier stand to add steel staple bolt structure of steel bent cap, its characterized in that: the mounting method comprises the following steps: a. sleeving a steel sleeve around a concrete upright post of the pier, and reserving a gap between the steel sleeve and the concrete upright post; b. pouring high-strength shrinkage-free cement mortar between the steel sleeve and the concrete upright column to enable the steel sleeve and the concrete upright column to be closely attached, so that the steel sleeve becomes a steel anchor ear; c. the steel hoop is externally provided with one or more outwardly extending steel members forming a steel capping beam or a steel corbel.
Compared with the prior art, the technical scheme of the invention comprises the improvement of a plurality of details besides the improvement of the whole technical scheme, and particularly has the following beneficial effects:
1. according to the improved scheme, the steel sleeve is arranged around the concrete upright post, the cement mortar layer is poured between the steel sleeve and the concrete upright post, so that the steel sleeve forms the steel hoop, the steel bent cap structure is arranged on the outer side of the steel hoop, and the steel hoop is closely attached to the concrete structure, so that strong frictional resistance is formed between the steel hoop and the concrete, and the purpose of providing the bearing capacity of the steel bent cap is achieved;
2. in the technical scheme of the invention, the outer surface of the concrete upright post is subjected to roughening treatment; the frictional resistance can be further increased;
3. according to the invention, a plurality of horizontally arranged thin steel bars, flat steel and the like are welded on the inner side of the steel hoop to form shear keys so as to increase the combination effect of the steel hoop and the concrete upright post and increase the friction resistance;
4. the structure of the invention has the characteristics of simple structure, convenient construction, reliable stress and economic cost, and is convenient for popularization and utilization.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 a-2 d are cross-sectional views of different embodiments of the invention in the direction a-a in fig. 1.
Fig. 3 a-3B are enlarged views of different embodiments of the portion B of fig. 1 according to the present invention.
Reference numerals:
concrete column 1, high-strength cement mortar 2, steel anchor ear 3, steel bent cap 4, concrete column surface scabbling part 5, round steel bar 6, flat steel bar 7.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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.
The invention provides a steel hoop structure for additionally arranging a steel capping beam on an upright post of a pier, and particularly relates to a steel hoop structure shown in figure 1, which comprises a concrete upright post, and is different from the prior art in that: set up the steel sleeve around the concrete stand, be equipped with the clearance between steel sleeve and the concrete stand, be equipped with the cement mortar layer in the clearance for the steel sleeve forms the steel staple bolt, and the steel staple bolt outside sets up the steel member formation steel bent cap or the steel corbel structure of one or more outside extensions.
Specifically, the concrete column may have various structures, such as square, circular, oval, triangular, rectangular and other polygonal structural shapes, and the steel sleeve matched with the concrete column and sleeved outside the concrete column is formed by welding or fixedly connecting two ends of a steel plate, and the steel sleeve is matched with the concrete column, and a gap with a proper width is left between the steel sleeve and the concrete column for subsequent grouting of cement mortar. It should be noted that the high-strength cement mortar poured here is shrinkage compensation type or micro expansion type mortar.
In one embodiment, the concrete upright posts are roughened at the positions corresponding to the steel cover beams, rough surfaces with the roughness not less than 6mm are formed by roughening, and the rough surfaces are cleaned. And a plurality of horizontally arranged thin steel bars, flat steel and the like are welded on the inner side of the steel hoop to form shear keys so as to increase the combination effect. The installation steel bent cap forms confined steel staple bolt, and the concrete stand lasts the moist certain time of watering, pours high strength cement mortar in the space between steel staple bolt and concrete stand, takes measures to make the mortar layer closely knit simultaneously. The strong frictional resistance of the structure is utilized to provide the bearing capacity of the steel bent cap or the steel bracket, and the purposes of simple structure, reliable connection, convenient construction and economic manufacturing cost are achieved.
Specifically, a gap is arranged between the steel sleeve and the concrete upright column, and the size of the gap is 15-30mm, preferably 20-25 mm. The factors considered by the width of the gap include processing errors, guarantee of the strength of a high-strength cement mortar layer, requirements of cement mortar grouting or mud jacking operation, influence on the shearing resistance of the screw rod and the like.
In another embodiment, the steel hoop surrounding the upright column is a steel hoop which is welded or bolted by steel plates and surrounds a circle, the steel hoop is made of the steel plates, a plurality of horizontally arranged shear key structures are welded on the inner side of the steel hoop, and the shear key structures are made of thin steel bars, round steel bars or flat steel. 3-7 shear key structures can be horizontally arranged, the shear keys can be arranged on the bottom of the shear key structure to be compact, and the shear keys can be arranged on the top of the shear key structure to be loose.
Specifically, the method is applied to the anti-overturning reinforcement project of the single-column pier of the welcome interchange of the highway, the single-column pier of the welcome interchange of the highway is a cylinder with the diameter of 1.5m, the height of each steel ferrule is 1.6m, 7 horizontal annular shear keys are uniformly arranged on the inner wall in the height direction, and each shear key is 2x30mm flat steel. The clear distance of the clearance between the steel anchor ear and the concrete upright post is 20mm, 100MPa high-strength non-shrinkage cement slurry is poured, shear-resistant studs are arranged, the distance is 300x300mm, the diameter of the full-thread stud is 30mm, and the embedded bar depth is 250 mm. The newly-installed steel cover beam is used for jacking the upper concrete box girder to replace the support, the jacking force provided by the steel cover beam can reach 810 tons, and the bearing capacity of the steel hoop is fully verified.
Specifically, the cross section of the steel anchor ear can be in various shapes such as a circle, an ellipse, a square rounded corner, a rectangle, a rectangular rounded corner or other polygons according to the different cross sections of the concrete columns. High-strength cement mortar is poured between the steel anchor ear and the concrete upright post, and the mortar is shrinkage compensation type or micro expansion type. Meanwhile, a shear resistant screw rod can be arranged between the steel hoop and the concrete upright post, so that the effect is further enhanced.
In a specific embodiment of the installation method, the installation method comprises the following steps: a. sleeving a steel sleeve around a concrete upright post of the pier, and reserving a gap between the steel sleeve and the concrete upright post; b. pouring high-strength shrinkage-free cement mortar between the steel sleeve and the concrete upright column to enable the steel sleeve and the concrete upright column to be closely attached, so that the steel sleeve becomes a steel anchor ear; c. the steel hoop is externally provided with one or more outwardly extending steel members forming a steel capping beam or a steel corbel.
Specifically, in the step a, before the concrete upright post is sleeved with the steel sleeve, roughening treatment is performed on the outer surface of the concrete upright post, wherein the thickness of the gap is 15-30 mm. And b, before cement mortar is poured, sprinkling water on the concrete upright column to keep the concrete upright column moist for 1-2 days, and the measure ensures that the cement mortar keeps moisture in the strength increasing process of the cement mortar, so that the mortar layer can reach the design strength and can be firmly combined with the concrete upright column. Grouting from the bottom of the steel anchor ear, performing pressure grouting by a top grout outlet method, vibrating and tamping during grouting, wherein an attached vibrator is adopted for vibrating, and a tamping piece made of an elastically bent flat steel piece is adopted for tamping, so that a high-strength cement mortar layer poured between the steel anchor ear and the concrete upright post is compact. And a plurality of horizontally arranged thin steel bars or flat steel bars are welded on the inner side of the steel hoop, so that the shear key of the steel hoop is increased.
The method of the invention can generate strong frictional resistance between the upright post and the steel hoop, thereby providing partial or whole bearing capacity of the steel bent cap. The structure has the characteristics of simple structure, convenient construction, reliable stress and economic manufacturing cost.
The foregoing is a more detailed description of the present invention in connection with specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific details set forth herein. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. The utility model provides a steel staple bolt structure that is used for pier stand to add steel bent cap, its includes the concrete stand, its characterized in that: set up the steel sleeve around the concrete stand, be equipped with the clearance between steel sleeve and the concrete stand, be equipped with the cement mortar layer in the clearance for the steel sleeve forms the steel staple bolt, and the steel staple bolt outside sets up the steel member formation steel lid beam structure of one or more outside extensions.
2. The steel hoop structure for the additional steel bent cap of the pier column according to claim 1, which is characterized in that: the outer surface of the concrete upright post is subjected to scabbling treatment, and the size of the gap is 15-30 mm.
3. The steel hoop structure for the additional steel bent cap of the pier column according to claim 1, which is characterized in that: the steel sleeve is made of a steel plate, a plurality of horizontally arranged shear key structures are welded on the inner side of the steel sleeve, and the shear key structures are made of thin steel bars or flat steel.
4. The steel hoop structure for the additional steel bent cap of the pier column according to claim 1, which is characterized in that: and a shear resistant screw is arranged between the steel hoop and the concrete upright post.
5. The installation method of the steel hoop structure for the pier stud additionally provided with the steel capping beam according to claim 1, wherein the installation method comprises the following steps: the mounting method comprises the following steps: a. sleeving a steel sleeve around a concrete upright post of the pier, and reserving a gap between the steel sleeve and the concrete upright post; b. pouring high-strength shrinkage-free cement mortar between the steel sleeve and the concrete upright column to enable the steel sleeve and the concrete upright column to be closely attached, so that the steel sleeve becomes a steel anchor ear; c. the steel hoop is externally provided with one or more outwardly extending steel members forming a steel capping beam or a steel corbel.
6. The installation method of the steel hoop structure for the pier stud additionally provided with the steel capping beam according to claim 1, wherein the installation method comprises the following steps: in the step a, before the concrete upright post is sleeved with the steel sleeve, roughening treatment is firstly carried out on the outer surface of the concrete upright post, and the thickness of the gap is 15-30 mm.
7. The installation method of the steel hoop structure for the pier stud additionally provided with the steel capping beam according to claim 1, wherein the installation method comprises the following steps: and b, before pouring cement mortar, sprinkling water on the concrete upright column to keep the concrete upright column moist for 1-2 days.
8. The installation method of the steel hoop structure for the pier stud additionally provided with the steel capping beam according to claim 1, wherein the installation method comprises the following steps: and b, grouting from the bottom of the steel hoop, performing pressure grouting by a top grout outlet method, and vibrating and tamping during grouting.
9. The installation method of the steel hoop structure for the pier stud additionally provided with the steel capping beam according to claim 1, wherein the installation method comprises the following steps: and b, welding a plurality of horizontally arranged thin steel bars or flat steel on the inner side of the steel hoop so as to enlarge the shear key of the steel hoop.
10. The installation method of the steel hoop structure for the pier stud additionally provided with the steel capping beam according to claim 1, wherein the installation method comprises the following steps: in the step a, a shear resistant screw is arranged between the concrete upright post and the steel sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910968515.3A CN110792032A (en) | 2019-10-12 | 2019-10-12 | Steel hoop structure for additionally arranging steel bent cap on pier stand column and installation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910968515.3A CN110792032A (en) | 2019-10-12 | 2019-10-12 | Steel hoop structure for additionally arranging steel bent cap on pier stand column and installation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110792032A true CN110792032A (en) | 2020-02-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910968515.3A Pending CN110792032A (en) | 2019-10-12 | 2019-10-12 | Steel hoop structure for additionally arranging steel bent cap on pier stand column and installation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110792032A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111424530A (en) * | 2020-03-25 | 2020-07-17 | 苏交科集团股份有限公司 | Oblique-pulling type single-column pier anti-overturning device |
| CN113136793A (en) * | 2021-04-30 | 2021-07-20 | 四川省交通勘察设计研究院有限公司 | Novel steel structure capping beam and construction method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202730672U (en) * | 2012-07-19 | 2013-02-13 | 西安建筑科技大学 | Supporting device for large traffic viewing screen and accessory equipment of the municipal bridge |
| CN202865750U (en) * | 2012-10-25 | 2013-04-10 | 新疆交通建设（集团）有限责任公司 | Load-bearing device of concrete bent cap |
| CN106437194A (en) * | 2016-11-11 | 2017-02-22 | 陕西省建筑科学研究院 | Node connection structure and node connection method for increasing section of concrete beam |
| CN209277020U (en) * | 2018-12-25 | 2019-08-20 | 河南丰力路桥科技有限公司 | A kind of only pier stud of antidumping reinforced type bridge |
-
2019
- 2019-10-12 CN CN201910968515.3A patent/CN110792032A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202730672U (en) * | 2012-07-19 | 2013-02-13 | 西安建筑科技大学 | Supporting device for large traffic viewing screen and accessory equipment of the municipal bridge |
| CN202865750U (en) * | 2012-10-25 | 2013-04-10 | 新疆交通建设（集团）有限责任公司 | Load-bearing device of concrete bent cap |
| CN106437194A (en) * | 2016-11-11 | 2017-02-22 | 陕西省建筑科学研究院 | Node connection structure and node connection method for increasing section of concrete beam |
| CN209277020U (en) * | 2018-12-25 | 2019-08-20 | 河南丰力路桥科技有限公司 | A kind of only pier stud of antidumping reinforced type bridge |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111424530A (en) * | 2020-03-25 | 2020-07-17 | 苏交科集团股份有限公司 | Oblique-pulling type single-column pier anti-overturning device |
| CN113136793A (en) * | 2021-04-30 | 2021-07-20 | 四川省交通勘察设计研究院有限公司 | Novel steel structure capping beam and construction method |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20200214 |