CN111962373A - Cast-in-situ RC and prefabricated UHPC combined box arch structure and construction method - Google Patents
Cast-in-situ RC and prefabricated UHPC combined box arch structure and construction method Download PDFInfo
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- CN111962373A CN111962373A CN202010901959.8A CN202010901959A CN111962373A CN 111962373 A CN111962373 A CN 111962373A CN 202010901959 A CN202010901959 A CN 202010901959A CN 111962373 A CN111962373 A CN 111962373A
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- 239000011374 ultra-high-performance concrete Substances 0.000 title claims abstract description 75
- 238000010276 construction Methods 0.000 title claims abstract description 17
- 238000011065 in-situ storage Methods 0.000 title claims description 27
- 229910000831 Steel Inorganic materials 0.000 claims description 21
- 239000010959 steel Substances 0.000 claims description 21
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 14
- 239000004567 concrete Substances 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims 1
- 239000011150 reinforced concrete Substances 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000002131 composite material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 238000009432 framing Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D4/00—Arch-type bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- 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
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention aims to solve the problems of difficult template erection, complicated arch ring bracket erection and overlarge bearing caused by the cast-in-place reinforced concrete box-section arch, and provides a cast-in-place RC and prefabricated UHPC combined box arch structure and a construction method. A cast-in-place RC and prefabricated UHPC combined box arch structure is integrally parabolic, is longitudinally divided into more than one box chamber and is transversely divided into a plurality of sections of combined units; each combined unit comprises a cast-in-place RC bottom plate and a prefabricated UHPC groove component, the cast-in-place RC bottom plate is provided with a first groove arranged downwards, the prefabricated UHPC groove component is provided with a second groove arranged upwards, the prefabricated UHPC groove component is arranged on the outer side of the cast-in-place RC bottom plate, and the cast-in-place RC bottom plate and the prefabricated UHPC groove component are connected through a seam, so that a hollow box-type structure is formed between the first groove and the second groove; and a connecting rib is arranged between the adjacent combined units.
Description
Technical Field
The invention relates to a cast-in-place RC and prefabricated UHPC combined box arch structure and a construction method, belonging to the technical field of bridges.
Background
The reinforced concrete arch bridge is a commonly adopted arch bridge form, and generally adopts a box-shaped section to reduce the dead weight due to the large dead weight, but the box-shaped section can cause the difficulty in arranging templates in the box. In addition, when the full framing construction method is adopted, the erection of the frames required by the cast-in-place arch ring is too complex, the load bearing of the frames is too large, the construction risk of the frames is higher, the construction difficulty is also higher, a lot of manpower and material cost is required to be invested, and the economic benefit of the reinforced concrete arch bridge is influenced.
In order to solve the problems, a better method is to carry out corresponding optimization design on the section structure of the arch ring, reduce the workload of concrete cast-in-place of the box-shaped arch and the workload of template erection in a box chamber, thereby reducing the construction difficulty and improving the economic effect.
Disclosure of Invention
The invention aims to solve the problems of difficult template erection, complicated arch ring bracket erection and overlarge bearing caused by the cast-in-place reinforced concrete box-section arch, and provides a cast-in-place RC and prefabricated UHPC combined box arch structure and a construction method.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a cast-in-place RC and prefabricated UHPC combined box arch structure is integrally parabolic, is longitudinally divided into more than one box chamber and is transversely divided into a plurality of sections of combined units; each combined unit comprises a cast-in-place RC bottom plate and a prefabricated UHPC groove component, the cast-in-place RC bottom plate is provided with a first groove arranged downwards, the prefabricated UHPC groove component is provided with a second groove arranged upwards, the prefabricated UHPC groove component is arranged on the outer side of the cast-in-place RC bottom plate, and the cast-in-place RC bottom plate and the prefabricated UHPC groove component are connected through a seam, so that a hollow box-type structure is formed between the first groove and the second groove; and a connecting rib is arranged between the adjacent combined units.
According to the preferable scheme of the cast-in-place RC and prefabricated UHPC combined box arch structure, a first steel bar which is vertical to and exposes out of the cast-in-place RC bottom plate is embedded in a cast-in-place RC bottom plate, a cushion block is reserved in the cast-in-place RC bottom plate, a second steel bar which is vertical to and exposes out of a prefabricated UHPC groove component is embedded in a prefabricated UHPC groove component, a cast-in-place belt is reserved between the cast-in-place RC bottom plate and the prefabricated UHPC groove component, the first steel bar and the second steel bar are welded and connected, UHPC is poured in the cast-in-place belt to form a.
According to the preferable scheme of the cast-in-place RC and prefabricated UHPC combined box arch structure, a cast-in-place RC base plate is provided with stressed reinforcing steel bars, and only constructional reinforcing steel bars are arranged in prefabricated UHPC groove type components and connecting ribs.
According to the preferable scheme of the cast-in-place RC and prefabricated UHPC combined box arch structure, an outer chamfer is arranged at the contact position of two adjacent prefabricated UHPC groove type components.
According to the preferable scheme of the cast-in-place RC and prefabricated UHPC combined box arch structure, inner chamfers are arranged on a first groove of a prefabricated UHPC groove component and a second groove of a cast-in-place RC base plate.
According to the preferable scheme of the cast-in-place RC and prefabricated UHPC combined box arch structure, the connecting ribs and the seams are UHPC.
The preferable scheme of the cast-in-place RC and prefabricated UHPC combined box arch structure is that the thickness of a joint is 10-15 cm; the thickness of the transverse ribs is 600-800 mm.
A construction method of a cast-in-place RC and prefabricated UHPC combined box arch structure comprises the following steps:
(1) erecting an arch ring bracket according to the design size and the requirement thereof, and installing a cast-in-situ RC bottom plate (1) template after the bracket is erected;
(2) after the cast-in-place RC bottom plate template is installed, pre-pressing the bracket to eliminate the influence caused by foundation settlement;
(3) binding reinforcing steel bars of the cast-in-situ RC bottom plate, and installing the reinforcing steel bars into the template, wherein first reinforcing steel bars are reserved at the transverse ribs and the joints;
(4) after the reinforcing steel bars are installed, pouring common concrete in the cast-in-place RC bottom plate template, and maintaining the bottom plate after the cushion blocks are reserved and poured;
(5) after the cast-in-place RC bottom plate concrete reaches 70% of the design strength, hoisting the prefabricated UHPC groove-shaped component, finishing the prefabricated UHPC groove-shaped component in a factory, and reserving transverse ribs and second steel bars at seams during manufacturing;
(6) and after the hoisting is finished, pouring the connecting ribs and the joints, after the pouring is finished, naturally curing for 48 hours, then performing steam curing for 48 hours, and after the design strength is reached, performing construction on other parts.
The invention has the advantages that: the construction method has the advantages of reasonable structure, simple construction and short period, can better solve the problems of difficult erection of the box-section template, complex erection of the arch ring bracket and overlarge bearing of the bracket, can reduce the workload of cast-in-place concrete, and reduces the dead weight and the maintenance cost of the arch ring by utilizing the ultrahigh strength and the higher durability of the UHPC, thereby having good application prospect.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
FIG. 1 is an elevational view of one embodiment of the present invention;
FIG. 2 is a sectional view A-A of the composite box arch structure of the present invention;
fig. 3 is a detailed structural view of the seam 2 of the present invention.
In the figure: 1-cast-in-place RC bottom plate, 2-prefabricated UHPC groove type parts, 3-UHPC transverse ribs, 4-cast-in-place UHPC seams, 5-RC bottom plate steel bar joints, 6-UHPC groove type part steel bar joints and 7-cushion blocks.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate directions
The positional or positional relationship is based on that shown in the drawings and is for convenience of description and simplicity of illustration only
Rather than indicating or implying that the device or element so referred to must have a particular orientation, be constructed and arranged in a particular orientation
Operation, and therefore, should not be construed as limiting the invention. Furthermore, "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Referring to fig. 1 and 2, a cast-in-place RC and prefabricated UHPC combined box arch structure is parabolic in shape, and is divided into more than one box chamber in the longitudinal direction and multi-segment combined units in the transverse direction; each combined unit comprises a cast-in-place RC base plate 1 and a prefabricated UHPC groove component 2, the cast-in-place RC base plate 1 is provided with a first groove arranged downwards, the prefabricated UHPC groove component 2 is provided with a second groove arranged upwards, the prefabricated UHPC groove component 2 is arranged on the outer side of the cast-in-place RC base plate 1, and the cast-in-place RC base plate 1 and the prefabricated UHPC groove component 2 are connected through a joint 4, so that a hollow box-type structure is formed between the first groove and the second groove; and a connecting rib 3 is arranged between the adjacent combined units.
Referring to fig. 3, a first steel bar 5 perpendicular to and exposing the cast-in-situ RC bottom plate 1 is embedded in the cast-in-situ RC bottom plate 1, a cushion block 7 is reserved in the cast-in-situ RC bottom plate, a second steel bar 6 perpendicular to and exposing the prefabricated UHPC groove part 2 is embedded in the prefabricated UHPC groove part 2, a cast-in-situ strip is reserved between the cast-in-situ RC bottom plate 1 and the prefabricated UHPC groove part 2, the first steel bar 5 and the second steel bar 6 are welded and connected, UHPC is poured in the cast-in-situ strip to form a joint 4, and the cast-in-situ RC bottom plate 1 and the.
In this embodiment, the cast-in-place RC base plate 1 is configured with stressed steel bars, and only constructional steel bars are arranged in the prefabricated UHPC groove type component 2 and the connecting ribs 3.
In this embodiment, an outer chamfer is arranged at the contact position of two adjacent prefabricated UHPC groove-shaped components 2. And inner chamfers are arranged on a first groove of the prefabricated UHPC groove-shaped component 2 and a second groove of the cast-in-situ RC base plate 1.
In this embodiment, the connecting ribs 3 and the joints 4 are UHPC.
In the embodiment, the thickness of the seam 4 is 10-15 cm; the transverse rib 3 can be arranged at the 1/4 arch of the whole combined box arch structure, and can be additionally arranged at the arch crown or other positions according to the actual engineering conditions, and the thickness of the transverse rib 3 is 600-800 mm.
A construction method of a cast-in-place RC and prefabricated UHPC combined box arch structure comprises the following steps:
(1) erecting an arch ring bracket according to the design size and the requirement thereof, and installing a cast-in-situ RC bottom plate (1) template after the bracket is erected;
(2) after the cast-in-place RC bottom plate 1 template is installed, pre-pressing the bracket to eliminate the influence caused by foundation settlement;
(3) binding reinforcing steel bars of the cast-in-situ RC bottom plate 1, and installing the reinforcing steel bars into the template, wherein first reinforcing steel bars 5 are reserved at the transverse ribs and the joints;
(4) after the reinforcing steel bars are installed, ordinary concrete is poured in the cast-in-place RC bottom plate 1 formwork, and after the cushion block 7 is reserved for pouring, the bottom plate is maintained;
(5) after the concrete of the cast-in-situ RC base plate 1 reaches 70% of the design strength, the prefabricated UHPC groove type component (2) can be hoisted, the prefabricated UHPC groove type component 2 is manufactured in a factory, and transverse ribs and second steel bars 6 at joints are reserved during manufacturing;
(6) and after the hoisting is finished, pouring the connecting ribs 3 and the joints 4, after the pouring is finished, naturally curing for 48 hours, then performing steam curing for 48 hours, and after the design strength is reached, performing construction on other parts.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a cast-in-place RC and prefabricated UHPC combination case arch structure which characterized in that: the whole body is in a parabola shape, and is longitudinally divided into more than one box chamber and transversely divided into a plurality of sections of combined units; each combined unit comprises a cast-in-place RC base plate (1) and a prefabricated UHPC groove component (2), the cast-in-place RC base plate (1) is provided with a first groove arranged downwards, the prefabricated UHPC groove component (2) is provided with a second groove arranged upwards, the prefabricated UHPC groove component (2) is arranged on the outer side of the cast-in-place RC base plate (1), and the cast-in-place RC base plate (1) and the prefabricated UHPC groove component (2) are connected through a seam (4), so that a hollow box structure is formed between the first groove and the second groove; and a connecting rib (3) is arranged between the adjacent combined units.
2. The cast-in-place RC and prefabricated UHPC combined box arch structure of claim 1, wherein: a first steel bar (5) which is perpendicular to and exposes out of the cast-in-situ RC base plate (1) is embedded in the cast-in-situ RC base plate (1), a cushion block (7) is reserved in the cast-in-situ RC base plate, a second steel bar (6) which is perpendicular to and exposes out of the prefabricated UHPC groove component (2) is embedded in the prefabricated UHPC groove component (2), a cast-in-situ belt is reserved between the cast-in-situ RC base plate (1) and the prefabricated UHPC groove component (2), the first steel bar (5) and the second steel bar (6) are connected in a welding mode, UHPC is poured in the cast-in-situ belt to form a joint (4), and the cast-in-situ RC base plate.
3. A cast-in-place RC and prefabricated UHPC combined box arch structure according to claim 1 or 2, wherein: the cast-in-situ RC bottom plate (1) is provided with stressed steel bars, and only constructional steel bars are arranged in the prefabricated UHPC groove type component (2) and the connecting ribs (3).
4. A cast-in-place RC and prefabricated UHPC combined box arch structure according to claim 1 or 2, wherein: and an outer chamfer is arranged at the contact position of two adjacent prefabricated UHPC groove-shaped components (2).
5. A cast-in-place RC and prefabricated UHPC combined box arch structure according to claim 1 or 2, wherein: and inner chamfers are arranged on a first groove of the prefabricated UHPC groove-shaped component (2) and a second groove of the cast-in-situ RC base plate (1).
6. A cast-in-place RC and prefabricated UHPC combined box arch structure according to claim 1 or 2, wherein: the connecting ribs (3) and the joints (4) are UHPC.
7. A cast-in-place RC and prefabricated UHPC combined box arch structure according to claim 1 or 2, wherein: the thickness of the seam (4) is 10-15 cm; the thickness of the transverse rib (3) is 600-800 mm.
8. A construction method of a cast-in-place RC and prefabricated UHPC combined box arch structure is characterized by comprising the following steps: the method comprises the following steps:
(1) erecting an arch ring bracket according to the design size and the requirement thereof, and installing a cast-in-situ RC bottom plate (1) template after the bracket is erected;
(2) after the cast-in-place RC bottom plate (1) template is installed, pre-pressing the bracket to eliminate the influence caused by foundation settlement;
(3) binding reinforcing steel bars of the cast-in-situ RC bottom plate (1), and installing the reinforcing steel bars into the template, wherein first reinforcing steel bars (5) are reserved at the transverse ribs and the joints;
(4) after the reinforcing steel bars are installed, ordinary concrete is poured in the template of the cast-in-place RC bottom plate (1), and after the cushion block (7) is reserved for pouring, the bottom plate is maintained;
(5) after the concrete of the cast-in-situ RC base plate (1) reaches 70% of the design strength, the prefabricated UHPC groove type component (2) can be hoisted, the prefabricated UHPC groove type component (2) is manufactured in a factory, and transverse ribs and second steel bars (6) at seams are reserved during manufacturing;
(6) and after the hoisting is finished, pouring the connecting ribs (3) and the joints (4), after the pouring is finished, naturally curing for 48 hours, then performing steam curing for 48 hours, and after the design strength is reached, performing construction on other parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010901959.8A CN111962373A (en) | 2020-09-01 | 2020-09-01 | Cast-in-situ RC and prefabricated UHPC combined box arch structure and construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010901959.8A CN111962373A (en) | 2020-09-01 | 2020-09-01 | Cast-in-situ RC and prefabricated UHPC combined box arch structure and construction method |
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| CN111962373A true CN111962373A (en) | 2020-11-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112627054A (en) * | 2021-02-01 | 2021-04-09 | 中铁大桥局集团第一工程有限公司 | Synchronous symmetrical construction method for multi-hole arch ring of arch bridge |
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| KR20120134282A (en) * | 2011-06-02 | 2012-12-12 | 위영민 | Slab-type box girder with a vertical connecting structure made by precast concrete and method constructing the bridge thereof |
| CN203593939U (en) * | 2013-11-25 | 2014-05-14 | 湖南大学 | Connecting structure of concrete beams differing in performance |
| CN108589535A (en) * | 2018-04-09 | 2018-09-28 | 中交第二航务工程局有限公司 | A kind of reinforced concrete box girder construction method |
| CN109016127A (en) * | 2018-07-27 | 2018-12-18 | 中国十七冶集团有限公司 | A kind of bridge arch box Prefabrication and its lateral connection method |
| CN109267654A (en) * | 2018-09-26 | 2019-01-25 | 重庆普珞沃建筑科技有限公司 | Combine prefabricated arch floor and overlapping arch sheet |
| CN212452232U (en) * | 2020-09-01 | 2021-02-02 | 山东省路桥集团有限公司 | Cast-in-situ RC and prefabricated UHPC combined box arch structure |
-
2020
- 2020-09-01 CN CN202010901959.8A patent/CN111962373A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120134282A (en) * | 2011-06-02 | 2012-12-12 | 위영민 | Slab-type box girder with a vertical connecting structure made by precast concrete and method constructing the bridge thereof |
| CN203593939U (en) * | 2013-11-25 | 2014-05-14 | 湖南大学 | Connecting structure of concrete beams differing in performance |
| CN108589535A (en) * | 2018-04-09 | 2018-09-28 | 中交第二航务工程局有限公司 | A kind of reinforced concrete box girder construction method |
| CN109016127A (en) * | 2018-07-27 | 2018-12-18 | 中国十七冶集团有限公司 | A kind of bridge arch box Prefabrication and its lateral connection method |
| CN109267654A (en) * | 2018-09-26 | 2019-01-25 | 重庆普珞沃建筑科技有限公司 | Combine prefabricated arch floor and overlapping arch sheet |
| CN212452232U (en) * | 2020-09-01 | 2021-02-02 | 山东省路桥集团有限公司 | Cast-in-situ RC and prefabricated UHPC combined box arch structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112627054A (en) * | 2021-02-01 | 2021-04-09 | 中铁大桥局集团第一工程有限公司 | Synchronous symmetrical construction method for multi-hole arch ring of arch bridge |
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