CN212153086U - Concrete combined pier column - Google Patents
Concrete combined pier column Download PDFInfo
- Publication number
- CN212153086U CN212153086U CN201921670783.9U CN201921670783U CN212153086U CN 212153086 U CN212153086 U CN 212153086U CN 201921670783 U CN201921670783 U CN 201921670783U CN 212153086 U CN212153086 U CN 212153086U
- Authority
- CN
- China
- Prior art keywords
- layer
- uhpc
- concrete
- steel
- steel cylinder
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Bridges Or Land Bridges (AREA)
Abstract
The utility model provides a concrete combination pier stud, relates to western saline soil engineering application, combination pier stud contains the ordinary concrete column in positive center to and surround interior UHPC layer, steel cylinder, outer UHPC layer, prestressing wire layer and the UHPC protective layer that ordinary concrete column just set gradually from inlayer to skin. An object of the utility model is to provide a concrete combination pier stud, its corrosion resisting property is good, and each contact surface bonding property is good, and whole resistance to compression bearing capacity is strong.
Description
Technical Field
The utility model relates to a western saline soil engineering application specifically is a concrete combination pier stud.
Background
In western areas of China, a concrete structure is subjected to the combined action of various corrosive ions in soil during the use process. Among them, chloride ions, sulfate ions and magnesium ions are the most common, and these three ions have great adverse effects on the durability of a concrete structure (even a reinforced concrete structure), and also have adverse reactions such as concrete carbonization, concrete alkali-aggregate reaction, steel reinforcement rust and candle. In the process of bridge construction and use, influence of western saline soil on the bridge pier cannot be ignored, so that a concrete combined pier column structure suitable for the western saline soil construction needs to be developed, corrosion-resistant support is improved for large bridges, and foundation construction in one road in China is guaranteed.
In order to solve the problems, people combine a Prestressed Concrete Cylinder Pipe (PCCP for short) to design a Concrete combined pier column, and the inner diameter of the PCCP Pipe is filled with Concrete, so that the corrosion resistance of the pier is greatly improved, but the Concrete combined pier column still has the following defects:
1. the common concrete on the two sides of the steel cylinder has large contractibility, the ultimate cohesive force of the contact surface between the steel cylinder and the concrete is low, the steel cylinder can not fully play a role, and the bonding performance of the contact surface is poor.
2. The center of the concrete combined pier column is provided with a common concrete column, the Poisson ratio of common concrete is reduced along with the increase of bearing capacity, the phenomenon of rapid reduction of bearing capacity can occur after the maximum bearing capacity is reached, and the whole bearing capacity is poor.
SUMMERY OF THE UTILITY MODEL
To the defect that exists among the prior art, the utility model aims to provide a concrete combination pier stud, its corrosion resisting property is good, and each contact surface adhesive property is good, and whole resistance to compression bearing capacity is strong.
In order to achieve the above purpose, the utility model adopts the technical proposal that: the combined concrete pier column comprises a common concrete column in the center, and an inner UHPC layer, a steel cylinder, an outer UHPC layer, a prestressed wire layer and an UHPC protective layer which surround the common concrete column and are sequentially arranged from an inner layer to an outer layer.
On the basis of the technical scheme, the prestressed steel wire layer is formed by winding cold-drawn steel wires.
On the basis of the technical scheme, the minimum axial distance between two adjacent circles of cold-drawn steel wires of the prestressed steel wire layer is larger than the diameter of the used steel wire.
On the basis of the technical scheme, the thickness of the steel cylinder is 5-20 mm, and the thickness of the inner UHPC layer and the thickness of the outer UHPC layer are both 20-40 mm; the diameter of the cold-drawn steel wire is 5-9 mm and the axial distance between two adjacent circles is 20 mm.
On the basis of the technical scheme, the steel cylinder is made of a thin steel plate, and the minimum yield strength of the thin steel plate is larger than 215 MPa.
On the basis of the technical scheme, the steel cylinder is made of thin steel plates by adopting spiral welding, plate splicing welding or winding drum welding.
On the basis of the technical scheme, the deviation between the depression or the protrusion on the surface of the steel cylinder and the reference surface of the steel cylinder is not more than 10 mm.
On the basis of the technical scheme, the cement adopted by the common concrete column is P.O 42.5 or P.O 52.5 portland cement.
On the basis of the technical scheme, the UHPC is high-titanium heavy slag sand ultrahigh-performance concrete.
On the basis of the technical scheme, the high-titanium heavy slag sand ultrahigh-performance concrete comprises the following components: 650-800 kg/m cement3150-200kg/m fly ash micro-bead3130-200 kg/m of silica fume350-100 kg/m of composite expanding agent3970-1200 kg/m of high-titanium heavy slag sand315 to 20kg/m of modified rubber particles3100-200 kg/m of copper-plated steel fiber322.5-28.5 kg/m of ultra-dispersion shrinkage-reducing admixture3And 140-160 kg/m water3。
The beneficial effects of the utility model reside in that:
1. the Concrete combined pier column of the utility model has three layers of Ultra-High Performance Concrete layers, namely an inner UHPC (Ultra-High Performance Concrete) layer, an outer UHPC layer and an UHPC protective layer; compared with the whole use of common concrete, the utility model discloses a concrete combination pier stud contractibility is littleer, and interior UHPC layer and outer UHPC layer can slightly expand, with steel cylinder, common concrete column and the contact that prestressing wire layer is inseparable, has strengthened the contact surface frictional force of steel cylinder inner wall and outer wall, and the contact surface ultimate bonding strength of steel cylinder and concrete is high, has improved the bonding property of each contact surface of concrete combination pier stud; meanwhile, the UHPC protective layer is positioned on the outermost layer of the concrete combined pier stud, so that the corrosion resistance of the UHPC protective layer is further enhanced; in addition, compared with the tendency that the Poisson ratio of common concrete is reduced along with the increase of the bearing capacity, the compressive bearing capacity of the UHPC concrete is strong, and the load-strain curve can not be rapidly reduced like the common concrete after reaching the limit bearing capacity.
2. The concrete combined pier stud of the utility model fully combines the tensile property of the prestressed wire layer and the anti-permeability property of the steel cylinder; meanwhile, the advantages of high strength, high durability and the like of the UHPC are brought into play, the method is suitable for standardized mass production in factories, and the technical problem that the west saline soil corrodes the bridge pier is effectively solved.
Drawings
Fig. 1 is a schematic cross-sectional view of an embodiment of the present invention.
Fig. 2 is an axial sectional view of an embodiment of the present invention.
Reference numerals: 1-UHPC protective layer, 2-prestressed wire layer, 3-outer UHPC layer, 4-steel cylinder, 5-inner UHPC layer, 6-common concrete column, 7-UHPC steel cylinder.
Detailed Description
The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
As shown in fig. 1 and 2, the concrete combined pier stud comprises a common concrete column 6 in the center, and an inner UHPC layer 5, a steel cylinder 4, an outer UHPC layer 3, a prestressed wire layer 2 and a UHPC protective layer 1 which surround the common concrete column 6 and are sequentially arranged from the inner layer to the outer layer.
Preferably, the prestressed steel wire layer 2 is wound by cold-drawn steel wires.
Further, the minimum axial distance between two adjacent circles of cold-drawn steel wires forming the prestressed steel wire layer 2 is larger than the diameter of the steel wire.
In the embodiment, the thickness of the steel cylinder 4 is 5-20 mm, the thickness of the inner UHPC layer 5 and the thickness of the outer UHPC layer 3 are both 20-40 mm, the diameter of the prestressed steel wire is 5-9 mm, and the axial distance between two adjacent circles of prestressed steel wires is 20 mm.
Preferably, the steel cylinder 4 is made of sheet steel, the sheet steel from which the steel cylinder 4 is made meeting the specifications of GB 700, GB 912 and GB 11253, respectively, while the sheet steel has a minimum yield strength greater than 215 Mpa.
Specifically, the steel cylinder 4 is made of thin steel plate by spiral welding, plate welding or drum welding.
Further, the deviation between the depressions or projections on the surface of the steel cylinder 4 and the reference surface of the steel cylinder 4 is not more than l0 mm.
In this embodiment, the common concrete column 6 is a cylinder with a diameter of 240-400 mm. In other embodiments, the common concrete column 6 may also be other columns, such as a square column, a triangular column, and a prism.
In the embodiment, the cement used for the common concrete column 6 is P · O42.5 or P · O52.5 portland cement. In another embodiment, if the combination concrete column has higher requirements for overall performance, UHPC can be used to replace the ordinary concrete.
In this example, UHPC is high titanium heavy slag sand ultra high performance concrete (the high titanium heavy slag sand ultra high performance concrete is derived from chinese patent CN 105060793A).
Specifically, the high-titanium heavy slag sand ultrahigh-performance concrete comprises the following components: 650-800 kg/m cement3150-200kg/m fly ash micro-bead3130-200 kg/m of silica fume350-100 kg/m of composite expanding agent3970-1200 kg/m of high-titanium heavy slag sand315 to 20kg/m of modified rubber particles3100-200 kg/m of copper-plated steel fiber322.5-28.5 kg/m of ultra-dispersion shrinkage-reducing admixture3And 140-160 kg/m water3。
Specifically, the ignition loss of the fly ash micro-beads is less than or equal to 5.0 percent, the water demand ratio is less than or equal to 90 percent, and the volume ratio of the spherical particles is more than or equal to 95 percent. SiO of silica fume2The mass content is more than or equal to 95 percent, and the specific surface area is more than or equal to 15500m2The activity index of/kg, 28d is more than or equal to 100 percent. The high-titanium heavy slag sand is high-strength porous fine aggregate which is obtained by performing water cooling or natural cooling on molten slag generated in vanadium titano-magnetite smelting, magnetic separation, crushing and screening, and has the fineness modulus of 2.5-3.2, the dust content of 3-5% and the bulk density of 1650-1870 kg/m3The apparent density is 2970-3300 kg/m3The porosity is 15-20%, and the saturated surface dry water absorption is 6.0-9.0%. The modified rubber particles are prepared by crushing waste tires to prepare 40-80-mesh rubber and modifying the rubber with NaOH solution. The nominal length of the copper-plated steel fiber is 10-16 mm, the equivalent diameter is 0.18-0.35 mm, the breaking strength is larger than or equal to 3000MPa, and the elastic modulus is 200-220 GPa. The concrete has high strength, good quick hardening, corrosion resistance, frost resistance, reinforcement protection and other excellent performances, and has the advantages of simple production process, low investment, low energy consumption and little pollution.
The utility model discloses a processing method of concrete combination pier stud as follows:
1. making a steel cylinder 4
The steel cylinder 4 is made of thin steel plates by spiral welding, plate welding or drum welding, and the large thin steel plate can be made of small thin steel plates by butt welding or lap welding.
Cleaning and leveling the surface of the steel cylinder 4 to prevent the surface from being adhered with grease, rusty scale, scraps and other foreign matters which can reduce the bonding strength between the steel cylinder 4 and concrete; and ensures that the deviation between the concave or convex of the surface of the steel cylinder 4 and the reference surface of the steel cylinder 4 is not more than 10 mm.
2. Pouring an inner UHPC layer 5 and an outer UHPC layer 3
And placing the steel cylinder 4 into a mould, pouring the inner UHPC layer 5 and the outer UHPC layer 3 to embed the steel cylinder 4 into UHPC concrete, and strongly vibrating to finally form the UHPC steel cylinder 7.
And then, covering a protective material for natural curing to prevent the concrete from excessive dehydration, and timely watering and curing after the concrete is fully solidified.
3. Winding prestressed wire layer 2
When the strength of concrete reaches the designed strength, the outer surface of the UHPC steel cylinder 7 can be wound, the UHPC steel cylinder 7 is firstly hung to a workbench of a winding machine, then the steel wires are wound by using differential winding to generate corresponding tensile stress, the steel wires are spirally wound on the UHPC steel cylinder 7, and the distance between the wound steel wires meets the standard requirement, namely the minimum axial distance between the steel wires is larger than the diameter of the used steel wires, and the fluctuation value of the tensile stress does not deviate from the average stress by +/-10% in the winding process.
4. Pouring common concrete column 6 and UHPC protective layer 1
Installing a template on the outer surface of the UHPC steel cylinder 7 after the wire is wound, and pouring a UHPC protective layer 1; pour ordinary concrete column 6 simultaneously, form after the maintenance the utility model discloses a concrete combination pier stud.
The concrete combined pier stud manufactured by the processing method has three ultra-high performance concrete layers, namely an inner UHPC layer 5, an outer UHPC layer 3 and an UHPC protective layer 1; compared with the totally used common concrete, the shrinkage is smaller, the ultimate cohesive force of the contact surfaces of the steel cylinder 4 and the UHPC concrete layers on the two sides is strong, and the bonding performance of a plurality of contact surfaces (specifically, the common concrete column 6 and the inner UHPC layer 5, the inner UHPC layer 5 and the steel cylinder 4, the steel cylinder 4 and the outer UHPC layer 3, and the outer UHPC layer 3 and the prestressed steel wire 2) is good.
Meanwhile, the inner UHPC layer 5 and the outer UHPC layer 3 can slightly expand and are in close contact with the steel cylinder 4, the common concrete column 6 and the prestressed wire layer 2, so that the friction force of contact surfaces of the inner wall and the outer wall of the steel cylinder 4 is enhanced, the ultimate bonding strength of the contact surfaces of the steel cylinder 4 and the concrete is high, the bonding performance of each contact surface of the concrete combined pier column is further ensured, and the concrete combined pier column is strong in bearing capacity and compressive capacity.
And moreover, the UHPC protective layer is positioned on the outermost layer of the concrete combined pier stud, so that the corrosion resistance of the concrete combined pier stud is further enhanced, and the UHPC protective layer can be more suitable for western saline soil.
In addition, compared with the tendency that the Poisson ratio of common concrete is reduced along with the increase of the bearing capacity, the UHPC concrete has strong compressive bearing capacity and strong ultimate bearing capacity, and the load-strain curve does not have the phenomenon of rapid reduction like common concrete after reaching the ultimate bearing capacity.
The present invention is not limited to the above preferred embodiments, and any person can obtain other products in various forms without departing from the scope of the present invention, but any change in shape or structure is within the scope of protection.
Claims (9)
1. The concrete combined pier column is characterized by comprising a common concrete column (6) in the center, an inner UHPC layer (5), a steel cylinder (4), an outer UHPC layer (3), a prestressed steel wire layer (2) and a UHPC protective layer (1), wherein the inner UHPC layer, the steel cylinder (4), the outer UHPC layer, the prestressed steel wire layer and the UHPC protective layer are sequentially arranged from the inner layer to the outer layer to surround the common concrete column (6).
2. The concrete composite pier of claim 1, wherein: the prestressed steel wire layer (2) is formed by winding cold-drawn steel wires.
3. The concrete composite pier of claim 2, wherein: the minimum axial distance between two adjacent circles of cold-drawn steel wires of the prestressed steel wire layer (2) is larger than the diameter of the used steel wire.
4. A concrete composite pier stud as claimed in claim 3, wherein: the thickness of the steel cylinder (4) is 5-20 mm, and the thickness of the inner UHPC layer (5) and the thickness of the outer UHPC layer (3) are both 20-40 mm; the diameter of the cold-drawn steel wire is 5-9 mm and the axial distance between two adjacent circles is 20 mm.
5. The concrete composite pier of claim 1, wherein: the steel cylinder (4) is made of a steel sheet having a minimum yield strength of more than 215 Mpa.
6. The concrete composite pier of claim 5, wherein: the steel cylinder (4) is made of thin steel plates by adopting spiral welding, plate splicing welding or winding drum welding.
7. The concrete composite pier of claim 6, wherein: the deviation between the concave or convex of the surface of the steel cylinder (4) and the reference surface of the steel cylinder (4) is not more than 10 mm.
8. The concrete composite pier of claim 1, wherein: the cement adopted by the common concrete column (6) is P.O 42.5 or P.O 52.5 Portland cement.
9. The concrete composite pier of any one of claims 1 to 8, wherein: the UHPC is high-titanium heavy slag sand ultra-high performance concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921670783.9U CN212153086U (en) | 2019-10-08 | 2019-10-08 | Concrete combined pier column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921670783.9U CN212153086U (en) | 2019-10-08 | 2019-10-08 | Concrete combined pier column |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212153086U true CN212153086U (en) | 2020-12-15 |
Family
ID=73704507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921670783.9U Expired - Fee Related CN212153086U (en) | 2019-10-08 | 2019-10-08 | Concrete combined pier column |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212153086U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114164749A (en) * | 2021-12-16 | 2022-03-11 | 武汉理工大学 | High-crack-resistance anti-corrosion pier structure and construction method thereof |
| CN115045441A (en) * | 2022-06-13 | 2022-09-13 | 武汉理工大学 | UHPC template-steel pipe concrete superposed short column and construction method thereof |
| CN117071476A (en) * | 2023-10-17 | 2023-11-17 | 山西交通科学研究院集团有限公司 | Composite isolation gate upright post |
-
2019
- 2019-10-08 CN CN201921670783.9U patent/CN212153086U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114164749A (en) * | 2021-12-16 | 2022-03-11 | 武汉理工大学 | High-crack-resistance anti-corrosion pier structure and construction method thereof |
| CN115045441A (en) * | 2022-06-13 | 2022-09-13 | 武汉理工大学 | UHPC template-steel pipe concrete superposed short column and construction method thereof |
| CN117071476A (en) * | 2023-10-17 | 2023-11-17 | 山西交通科学研究院集团有限公司 | Composite isolation gate upright post |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212153086U (en) | Concrete combined pier column | |
| Wang et al. | Ultra-lightweight engineered cementitious composite using waste recycled hollow glass microspheres | |
| CN108360748A (en) | A kind of composite steel tube UHPC damping stubs | |
| CN107447646B (en) | Preparation method of steel-continuous fiber composite bar ECC-concrete composite column/pier | |
| CN202519664U (en) | High tensile reinforcement reinforced prestressed UHPC (Ultra High Performance Concrete) thin-wall tubular pile component | |
| CN205063178U (en) | Engineered cementitious composites combination beam component | |
| CN102587578A (en) | High-strength steel bar enhanced engineered cementitious composites (ECC)-hollow steel pipe ultra high performance concrete (UHPC) combination column member and manufacturing method thereof | |
| Chen | Basic mechanical properties and microstructural analysis of recycled concrete | |
| CN102898103B (en) | Section steel high-ductility fiber concrete combined column | |
| CN107245947A (en) | A kind of reinforced concrete structure containing early-strength ultra-high performance concrete | |
| CN108894432A (en) | A kind of very-high performance steel fiber concrete pipe constraint regeneration monolith column | |
| CN102888946B (en) | Steel pipe high-elongation fiber concrete combined column | |
| CN113293930A (en) | UHPC pipe restraint recycled concrete post externally pasted with FRP cloth | |
| Song et al. | Mechanical properties of polypropylene-fiber-reinforced high-performance concrete based on the response surface method | |
| CN103510738A (en) | High-durability large-bending-moment concrete electric pole | |
| CN111099865B (en) | High-temperature-cracking-resistant C250 reactive powder concrete and preparation, forming and curing methods thereof | |
| Kayali | Sustainability of fibre composite concrete construction | |
| CN114293539B (en) | Functional gradient self-healing high-strength concrete pipe pile and preparation method thereof | |
| CN110056129A (en) | FRP pipe profile sea sand fast hardening concrete square combination column | |
| CN104328735B (en) | Regeneration concrete Z-type pier stud | |
| CN113513016A (en) | Prestressed high-strength concrete mixed reinforcement pointed angle pile and preparation method thereof | |
| Zheng et al. | Research on Mechanical and Carbonization Properties of Hybrid Fiber Iron Tailings Concrete Based on Deep Learning | |
| CN111827579A (en) | Steel pipe desert sand lightweight aggregate concrete combined column | |
| CN220014209U (en) | UHPC pipe-waste fiber recycled concrete-Mi-shaped steel combined pier column | |
| CN104294754B (en) | T-shaped section steel pipe regeneration concrete pier shaft |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201215 |