CN108678161B - Prestressed concrete row frame column and construction method - Google Patents
Prestressed concrete row frame column and construction method Download PDFInfo
- Publication number
- CN108678161B CN108678161B CN201810759309.7A CN201810759309A CN108678161B CN 108678161 B CN108678161 B CN 108678161B CN 201810759309 A CN201810759309 A CN 201810759309A CN 108678161 B CN108678161 B CN 108678161B
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- CN
- China
- Prior art keywords
- column
- steel strand
- prestressed steel
- unbonded
- concrete
- 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.)
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- 239000011513 prestressed concrete Substances 0.000 title claims abstract description 13
- 238000010276 construction Methods 0.000 title claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 53
- 239000010959 steel Substances 0.000 claims abstract description 53
- 238000004873 anchoring Methods 0.000 claims abstract description 26
- 239000004567 concrete Substances 0.000 claims abstract description 17
- 239000011248 coating agent Substances 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 10
- 230000001050 lubricating effect Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 239000004033 plastic Substances 0.000 claims description 10
- 238000005260 corrosion Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 6
- 239000010426 asphalt Substances 0.000 claims description 3
- 239000011083 cement mortar Substances 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 239000004519 grease Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 239000011150 reinforced concrete Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/19—Three-dimensional framework structures
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/34—Columns; Pillars; Struts of concrete other stone-like material, with or without permanent form elements, with or without internal or external reinforcement, e.g. metal coverings
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/19—Three-dimensional framework structures
- E04B1/1903—Connecting nodes specially adapted therefor
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention provides a prestressed concrete row frame column, which comprises a foundation, a lower column and an upper column; the foundation, the lower column and the upper column are sequentially connected from bottom to top; the foundation is internally embedded with a lower anchoring device, the lower anchoring device is anchored with an unbonded prestressed steel strand, and the unbonded prestressed steel strand is positioned in the lower column and the upper column; the unbonded prestressed steel strands are provided with vertical stress bars, and the surfaces of the vertical stress bars are tied with transverse stirrups; the top end of the unbonded prestress steel strand is fixedly connected with an upper anchoring device. The invention reduces or counteracts the concrete pulling force caused by the load by applying the prestress pressure to the concrete bent column, thereby reducing the tensile stress of the concrete bent column, meeting the rigidity and deformation control requirements of the factory building on the concrete bent column, simultaneously reducing the section size of the concrete bent column and the consumption of the steel bars as much as possible, reducing the civil engineering scale and investment of the factory building, and achieving the effects of simple, firm and reliable construction.
Description
Technical Field
The invention relates to a prestressed concrete bent column and a construction method thereof, and belongs to the technical field of hydraulic and hydroelectric engineering.
Background
The bent is an upper supporting structure commonly used in hydropower plants, the reinforced concrete bent is composed of a roof truss, a bent column and a foundation, the upper portion of the bent column is hinged with the roof truss, and the lower portion of the bent column is just connected with the foundation. Wherein the racking column is the primary stress member to bear both vertical and horizontal loads.
The reinforced concrete bent column is generally composed of an upper column, a lower column and bracket, and the section type is mainly rectangular. Besides meeting the requirement of bearing capacity, the reinforced concrete bent column should also ensure enough rigidity so as to prevent the deformation of the factory building from being too large, thereby affecting the normal operation of the bridge machine, or causing cracks on the wall body and the roof, and affecting the normal use of the factory building. At present, due to the running and maintenance requirements of the hydropower station plant, the bridge crane has larger load, so that the section size of the bent frame column is increased to meet the deflection requirement, and the size of the bent frame column is increased to increase the size of the lower part of the plant, thereby increasing the civil engineering scale of the whole plant and increasing the investment.
Disclosure of Invention
In order to solve the technical problems, the invention provides a prestressed concrete frame column and a construction method thereof, which solve the defects that the section size of the frame column is enlarged due to the limitation of rigidity and deformation control conditions of a structure required by the specification of the conventional hydropower station plant concrete frame column, so that the civil engineering scale of the plant is required to be enlarged and the investment is increased.
The invention is realized by the following technical scheme.
The invention provides a prestressed concrete row frame column, which comprises a foundation, a lower column and an upper column; the foundation, the lower column and the upper column are sequentially connected from bottom to top; the foundation is internally embedded with a lower anchoring device, the lower anchoring device is anchored with an unbonded prestressed steel strand, and the unbonded prestressed steel strand is positioned in the lower column and the upper column; the unbonded prestressed steel strands are provided with vertical stress bars, and the surfaces of the vertical stress bars are tied with transverse stirrups; the top end of the unbonded prestress steel strand is fixedly connected with an upper anchoring device.
The vertical stress bars and the transverse stirrups are positioned in the lower column and the upper column.
The unbonded prestressed steel strand comprises a prestressed steel strand, wherein the surface of the prestressed steel strand is coated with an anti-corrosion lubricating coating material layer, and a plastic jacket is wrapped outside the anti-corrosion lubricating coating material layer.
The anti-corrosion lubricating coating material layer is asphalt.
The plastic jacket is made of plastic paper.
Based on a construction method of a prestressed concrete row frame column; the method comprises the following steps:
(1) embedding a plurality of lower anchoring devices in the foundation, and anchoring unbonded prestressed steel strands on each lower anchoring device;
(2) installing a vertical stress bar on the unbonded prestressed steel strand, and installing a transverse stirrup on the surface of the vertical stress bar;
(3) pouring concrete into the unbonded prestressed steel strands to form a lower column and an upper column, and tensioning the unbonded prestressed steel strands by using a jack when the strength of the concrete is not less than 75%;
(4) after the unbonded prestressed steel strand is tensioned, the top of the unbonded prestressed steel strand is fixed by an upper anchoring device, and the unbonded prestressed steel strand is subjected to grease sealing or epoxy resin cement mortar sealing.
The invention has the beneficial effects that: the prestressed pressure is applied to the concrete bent columns to reduce or offset the concrete tensile force caused by the load, so that the tensile stress of the concrete bent columns is reduced, the requirements of the factory building on rigidity and deformation control of the concrete bent columns are met, the section size and the steel bar consumption of the concrete bent columns are reduced as much as possible, the civil engineering scale and investment of the factory building are reduced, and the effects of simplicity in construction, firmness and reliability are achieved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a top view of the upper column of the present invention;
FIG. 3 is a top view of the lower column of the present invention;
FIG. 4 is a schematic structural view of an unbonded prestressed steel strand according to the present invention;
in the figure: 1-foundation, 2-lower column, 3-upper column, 4-vertical stress rib, 5-transverse stirrup, 6-unbonded prestressed steel strand, 7-lower anchoring device, 8-upper anchoring device, 9-prestressed steel strand, 10-anticorrosion lubricating coating material layer and 11-plastic jacket.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the above.
As shown in fig. 1 to 3, a prestressed concrete bent column comprises a foundation 1, a lower column 2 and an upper column 3; the foundation 1, the lower column 2 and the upper column 3 are sequentially connected from bottom to top; the foundation 1 is internally embedded with a lower anchoring device 7, the lower anchoring device 7 is anchored with an inherent unbonded prestressed steel strand 6 (no hole is reserved, the tensioning is convenient), and the unbonded prestressed steel strand 6 is positioned in the lower column 2 and the upper column 3; the unbonded prestressed steel strand 6 is provided with a vertical stress rib 4, and the surface of the vertical stress rib 4 is tied with a transverse stirrup 5; the top end of the unbonded prestressed steel strand 6 is fixedly connected with an upper anchoring device 8.
The vertical stress bars 4 and the transverse stirrups 5 are positioned in the lower column 2 and the upper column 3.
The unbonded prestressed steel strand 6 comprises a prestressed steel strand 9, wherein an anti-corrosion lubricating coating material layer 10 is coated on the surface of the prestressed steel strand 9, and a plastic jacket 11 is wrapped outside the anti-corrosion lubricating coating material layer 10, as shown in fig. 4.
The anti-corrosion lubricating coating material layer 10 is asphalt.
The plastic outer sleeve 11 is made of plastic paper.
Based on a construction method of a prestressed concrete row frame column; the method comprises the following steps:
(1) embedding a plurality of lower anchoring devices 7 in the foundation 1, and anchoring unbonded prestressed steel strands 6 on each lower anchoring device 7;
(2) the vertical stress steel strand 6 is provided with a vertical stress steel strand 4, and the surface of the vertical stress steel strand 4 is provided with a transverse stirrup 5;
(3) pouring concrete into the unbonded prestressed steel strands 6 to form a lower column 2 and an upper column 3, and tensioning the unbonded prestressed steel strands 6 by using a jack when the strength of the concrete is not less than 75%;
(4) after the unbonded prestressed steel strand 6 is tensioned, the top of the unbonded prestressed steel strand 6 is fixed by an upper anchoring device 8, and the unbonded prestressed steel strand 6 is subjected to grease sealing or epoxy resin cement mortar sealing.
Claims (4)
1. The construction method of the prestressed concrete row frame column comprises a foundation (1), a lower column (2) and an upper column (3), and is characterized in that: the foundation (1), the lower column (2) and the upper column (3) are sequentially connected from bottom to top; the foundation (1) is internally embedded with a lower anchoring device (7), the lower anchoring device (7) is anchored with an unbonded prestressed steel strand (6), and the unbonded prestressed steel strand (6) is positioned in the lower column (2) and the upper column (3); the unbonded prestressed steel strand (6) is provided with a vertical stress rib (4), and the surface of the vertical stress rib (4) is tied with a transverse stirrup (5); the top end of the unbonded prestress steel strand (6) is fixedly connected with an upper anchoring device (8);
the unbonded prestressed steel strand (6) comprises a prestressed steel strand (9), an anti-corrosion lubricating coating material layer (10) is coated on the surface of the prestressed steel strand (9), and a plastic jacket (11) is wrapped outside the anti-corrosion lubricating coating material layer (10);
the method comprises the following steps:
(1) embedding a plurality of lower anchoring devices (7) in the foundation (1), and anchoring unbonded prestressed steel strands (6) on each lower anchoring device (7);
(2) the method comprises the steps that a vertical stress rib (4) is arranged on an unbonded prestress steel strand (6), and a transverse stirrup (5) is arranged on the surface of the vertical stress rib (4);
(3) pouring concrete into the unbonded prestressed steel strand (6) to form a lower column (2) and an upper column (3), and tensioning the unbonded prestressed steel strand (6) by using a jack when the strength of the concrete is not less than 75%;
(4) after the unbonded prestressed steel strand (6) is tensioned, the top of the unbonded prestressed steel strand (6) is fixed by an upper anchoring device (8), and the unbonded prestressed steel strand (6) is subjected to grease sealing or epoxy resin cement mortar sealing.
2. The method of constructing a prestressed concrete bent column according to claim 1, wherein: the vertical stress bars (4) and the transverse stirrups (5) are positioned in the lower column (2) and the upper column (3).
3. The method of constructing a prestressed concrete bent column according to claim 1, wherein: the anti-corrosion lubricating coating material layer (10) is asphalt.
4. The method of constructing a prestressed concrete bent column according to claim 1, wherein: the plastic jacket (11) is made of plastic paper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810759309.7A CN108678161B (en) | 2018-07-11 | 2018-07-11 | Prestressed concrete row frame column and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810759309.7A CN108678161B (en) | 2018-07-11 | 2018-07-11 | Prestressed concrete row frame column and construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108678161A CN108678161A (en) | 2018-10-19 |
| CN108678161B true CN108678161B (en) | 2024-01-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810759309.7A Active CN108678161B (en) | 2018-07-11 | 2018-07-11 | Prestressed concrete row frame column and construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108678161B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111350893A (en) * | 2020-03-08 | 2020-06-30 | 中国路桥工程有限责任公司 | Connecting type conduit device for underwater concrete pouring |
| CN112095657A (en) * | 2020-09-27 | 2020-12-18 | 中冶京诚工程技术有限公司 | Retaining wall foundation structure |
Citations (8)
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|---|---|---|---|---|
| CN101440650A (en) * | 2008-12-17 | 2009-05-27 | 中国建筑东北设计研究院有限公司 | Heat preserving load bearing single layer concrete wall panel with crane beam |
| KR20100066857A (en) * | 2008-12-10 | 2010-06-18 | 한국건설기술연구원 | Connecting structure steel composite bent and cast in a place concrete pile and constructing method thereof |
| CN102418383A (en) * | 2010-09-28 | 2012-04-18 | 杨峰 | Single-layer plant mixed structure system with traveling crane and construction method |
| CN103147458A (en) * | 2013-02-27 | 2013-06-12 | 同济大学 | Self-restoring frame column base joint |
| CN103938757A (en) * | 2014-04-16 | 2014-07-23 | 同济大学 | Prestressed self-reset shear wall with bottom provided with horizontal seam |
| CN103966953A (en) * | 2013-02-06 | 2014-08-06 | 永升建设集团有限公司 | Large-span concrete beam construction method based on unbonded steel strand prestress post-tensioning |
| CN104452566A (en) * | 2014-10-22 | 2015-03-25 | 大连海事大学 | Swing self-reset bridge bent frame with ductility replaceable collar beam and installation method thereof |
| CN208650256U (en) * | 2018-07-11 | 2019-03-26 | 中国电建集团贵阳勘测设计研究院有限公司 | A kind of prestressed concrete bent columns |
-
2018
- 2018-07-11 CN CN201810759309.7A patent/CN108678161B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100066857A (en) * | 2008-12-10 | 2010-06-18 | 한국건설기술연구원 | Connecting structure steel composite bent and cast in a place concrete pile and constructing method thereof |
| CN101440650A (en) * | 2008-12-17 | 2009-05-27 | 中国建筑东北设计研究院有限公司 | Heat preserving load bearing single layer concrete wall panel with crane beam |
| CN102418383A (en) * | 2010-09-28 | 2012-04-18 | 杨峰 | Single-layer plant mixed structure system with traveling crane and construction method |
| CN103966953A (en) * | 2013-02-06 | 2014-08-06 | 永升建设集团有限公司 | Large-span concrete beam construction method based on unbonded steel strand prestress post-tensioning |
| CN103147458A (en) * | 2013-02-27 | 2013-06-12 | 同济大学 | Self-restoring frame column base joint |
| CN103938757A (en) * | 2014-04-16 | 2014-07-23 | 同济大学 | Prestressed self-reset shear wall with bottom provided with horizontal seam |
| CN104452566A (en) * | 2014-10-22 | 2015-03-25 | 大连海事大学 | Swing self-reset bridge bent frame with ductility replaceable collar beam and installation method thereof |
| CN208650256U (en) * | 2018-07-11 | 2019-03-26 | 中国电建集团贵阳勘测设计研究院有限公司 | A kind of prestressed concrete bent columns |
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| Publication number | Publication date |
|---|---|
| CN108678161A (en) | 2018-10-19 |
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