CN110725193A - Full-prefabricated steel pipe concrete space truss-UHPC waffle slab composite beam and construction method - Google Patents
Full-prefabricated steel pipe concrete space truss-UHPC waffle slab composite beam and construction method Download PDFInfo
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- CN110725193A CN110725193A CN201910581517.7A CN201910581517A CN110725193A CN 110725193 A CN110725193 A CN 110725193A CN 201910581517 A CN201910581517 A CN 201910581517A CN 110725193 A CN110725193 A CN 110725193A
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- space truss
- uhpc
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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
- E01D19/00—Structural or constructional details of bridges
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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
- E01D19/00—Structural or constructional details of bridges
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for bridges
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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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
Abstract
The invention discloses a fully-prefabricated steel pipe concrete space truss-UHPC waffle slab composite beam and a construction method. The construction method comprises the following steps: (1) processing, manufacturing and assembling the steel pipe concrete space truss; (2) prefabricating and transporting the UHPC waffle bridge deck; (3) and (5) pouring a shear groove and a wet joint. The steel pipe concrete space truss and the prefabricated waffle bridge deck are fixed together through the shear groove connecting piece. The combined beam has the advantages of reasonable stress, high strength, large rigidity, small height, full satisfaction of clearance requirements, light self weight, convenience in transportation, hoisting and splicing, good seismic performance and fatigue resistance, and good economic benefit and practical value.
Description
Technical Field
The invention relates to the technical field of bridge engineering, in particular to a full-prefabricated concrete filled steel tube space truss-UHPC waffle slab composite beam and a construction method.
Background
The rapid bridge construction (ABC) originates from the United states, and is a technology for accelerating the construction speed of a bridge site by mainly prefabricating components in an industrial manner and adopting special transportation equipment to transport the components to the site and install the components. The steel-concrete composite beam has excellent mechanical property that the upper concrete plate is pressed and the lower steel beam is pulled, is easy to realize the assembly of the steel beam and the precast concrete plate, is considered by engineering personnel firstly, and is applied to the rapid construction of the bridge. However, the traditional concrete slab is thick and has large self weight, so that the hoisting requirement is not easy to realize, and the concrete in the negative bending area is easy to crack under tension, so that the durability of the composite beam is poor.
Therefore, it is proposed to replace the conventional concrete slab with an Ultra High Performance Concrete (UHPC) slab, which has excellent mechanical characteristics and good durability, and is light in weight. Because of the high material strength of UHPC, the stress requirement can be met by a small plate thickness, but the rigidity is insufficient due to the insufficient plate thickness, and then a waffle plate structure with longitudinal and transverse ribs is provided. The traditional I-shaped steel-concrete combined beam is single in form, limited in span and poor in torsion resistance.
Disclosure of Invention
The invention aims to provide a fully-prefabricated steel tube concrete space truss-UHPC waffle slab composite beam and a construction method.
In order to achieve the above purpose, one technical solution of the present invention is: the full-prefabricated steel pipe concrete space truss-UHPC waffle slab combination beam comprises a prefabricated steel pipe concrete space truss, wherein the steel pipe concrete space truss is formed by mutually splicing flange bolts and prefabricated nodes, a prefabricated UHPC waffle slab is placed above the steel pipe concrete space truss, and the prefabricated UHPC waffle slab and the steel pipe concrete space truss are mutually connected through a shear groove connecting piece.
Furthermore, the cross section of the steel pipe concrete space truss is single-truss single-row, multi-truss multi-row, multi-truss single-row or multi-truss multi-row.
Furthermore, the section of the steel tube concrete space truss is in a shape of three limbs, namely a triangle, four limbs, namely a rectangle, or five limbs, namely a trapezoid.
Furthermore, the steel pipe concrete space truss is composed of an upper chord member, a web member and a lower chord member and is divided into a standard beam section, a hogging moment section and a node section, wherein concrete is poured on only the lower chord member of the standard beam section, and concrete is poured on both the upper chord member and the lower chord member of the hogging moment section.
Furthermore, the steel pipes in the concrete filled steel pipe space truss are round steel pipes, rectangular steel pipes and trapezoidal steel pipes.
Furthermore, a stiffening structure consisting of studs or perforated steel plates is arranged in the concrete filled steel tube space truss.
Furthermore, the shear groove connecting piece is a tenon type connecting piece or a group nail shear connecting piece.
Further, the cross section of the prefabricated UHPC waffle bridge panel is rectangular, trapezoidal or U-shaped.
In order to achieve the above object, another technical solution of the present invention is: a construction method of a full-prefabricated steel pipe concrete space truss-UHPC waffle slab composite beam comprises the following steps:
(1) processing, manufacturing and installing the steel pipe concrete space truss: dividing the processed steel pipe into an upper chord member, a web member and a lower chord member, respectively carrying out the step of whether concrete is poured or not, respectively assembling the upper chord member, the web member and the lower chord member into a standard beam segment, a negative bending moment segment and a node segment, pre-tightening different segments through flange bolts and prefabricated nodes to form an integral space truss or a partial space truss, positioning and welding a shear groove connecting piece on the steel pipe concrete space truss, and then transporting to the site;
(2) prefabricating and transporting the UHPC waffle bridge deck: dividing the bridge deck into a plurality of bridge deck units according to the width and the span of the bridge deck, pouring UHPC waffle bridge deck units with different sizes and provided with shear grooves and tooth-shaped joints in a specified template system, removing the template after 72-hour normal-temperature maintenance, performing 72-hour steam maintenance, and conveying the bridge deck to a site after the maintenance is finished;
(3) pouring a shear groove and a wet joint: the steel pipe space truss flange bolts are finally tightened, the steel pipe concrete space truss and the bridge deck are respectively hoisted to the designated positions, the shear grooves are poured, the truss and the bridge deck are connected through the connecting pieces, longitudinal and transverse wet joints are poured, and different bridge deck units are connected into a whole, compared with the prior art, the steel pipe space truss structure has the advantages that:
1. the novel full-prefabricated steel tube concrete space truss-UHPC waffle slab composite beam comprises standard beam sections, hogging moment sections and node sections, wherein the sections are connected through flanges and bolts, so that complete prefabricated assembly can be achieved, and rapid construction of assembly is facilitated. Compared with the traditional I-shaped steel-concrete composite beam, the composite beam has the advantages of reasonable stress, high bearing capacity, high bending rigidity, good stability and integrity, good anti-seismic performance and fatigue resistance performance and the like, and meanwhile, the composite beam has the advantages of light structure, simplicity and convenience in construction, low manufacturing cost and smaller height, and fully meets the clearance requirement.
2. According to the construction method of the steel pipe concrete space truss-UHPC waffle slab combination beam, the UHPC waffle slabs and the steel pipe concrete space truss are fully combined through pouring the shear grooves, and the UHPC waffle slabs are connected into a whole through pouring the longitudinal and transverse wet joints. Can realize the batchization prefabrication, it is high-efficient convenient to construct, be convenient for transportation, hoist and mount and concatenation, environmental protection safety to can guarantee combination beam construction precision, have good economic benefits and practical value.
Drawings
FIG. 1 is a schematic structural view of a composite beam according to the present invention;
FIG. 2 is a schematic structural view of a concrete filled steel tube space truss according to the present invention;
3-1 and 3-2 are detailed structural schematic diagrams of the concrete filled steel tube space truss joint of the invention;
FIG. 4 is a schematic cross-sectional view of a standard girder segment and a hogging moment segment of a pier of the composite girder according to the present invention.
Fig. 5-1 to 5-4 are four schematic cross-sectional views of the concrete filled steel tube space truss according to the present invention.
Fig. 6-1 to 6-8 are schematic cross-sectional views of eight kinds of steel pipes according to the present invention.
Fig. 7 is a flow chart illustrating a construction method of the composite beam according to the present invention.
The labels in the figure are: 1-upper chord, 2-web member, 3-lower chord, 4-steel pipe concrete space truss, 5-shear groove connecting piece, 6-UHPC waffle bridge deck, 7-flange, 8-bolt, 9-prefabricated node, 10-bolt, 11-perforated steel plate, 12-standard beam segment, 13-hogging moment segment and 14-node segment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described with reference to the accompanying drawings.
As shown in fig. 1 to 3-2, the fully-prefabricated steel pipe concrete space truss-UHPC waffle slab composite beam comprises a prefabricated steel pipe concrete space truss 4, the steel pipe concrete space truss 4 is spliced through a flange 7, a bolt 8 and a prefabricated node 9, a prefabricated UHPC waffle bridge deck 6 is placed on the steel pipe concrete space truss 4, and the prefabricated UHPC waffle bridge deck 6 is connected with the steel pipe concrete space truss 4 through a shear groove connecting piece 5.
In the embodiment of the present invention, as shown in fig. 1 and 2, the cross-sectional shape of the concrete filled steel tube space truss 4 may be three-limb, i.e., triangular, or may be four limbs, i.e., rectangular), or five limbs, i.e., trapezoidal.
In the embodiment of the present invention, as shown in fig. 3-1 to 4, the steel pipe concrete space truss 4 is composed of a rod system including an upper chord member 1, a web member 2, a lower chord member 3, and the like, and is divided into sections including a standard beam section 12, a pier negative bending moment section 13, a node section 14, and the like, wherein only the lower chord member of the standard beam section 12 is poured with concrete, and both the upper chord member and the lower chord member of the pier negative bending moment section 13 are poured with concrete. The upper chord member 1, the web members 2 and the lower chord member 3 are all made of steel pipes.
In the embodiment of the present invention, as shown in fig. 5-1 to 5-4, the cross section of the concrete-filled steel tube space truss 4 may be a plurality of single rows, or may be a single row, a plurality of rows, or a plurality of rows.
In the embodiment of the present invention, as shown in fig. 6-1 to 6-3, the steel pipe is a circular steel pipe, but may be a rectangular steel pipe or a trapezoidal steel pipe.
In the embodiment of the present invention, as shown in fig. 6-1 to 6-6, the concrete filled steel tube may be solid concrete filled steel tube, or may be hollow concrete filled steel tube.
In the embodiment of the present invention, as shown in fig. 6 to 7 and 6 to 8, the concrete filled steel tube internal stiffening structure is a stud 10, but may be an open-pore steel plate 11.
In the embodiment of the invention, as shown in fig. 1 and 2, the shear groove connecting piece is a tenon type connecting piece, and can be a group nail connecting piece.
In the embodiment of the present invention, as shown in fig. 1 and 4, the cross section of the prefabricated UHPC waffle slab 6 is rectangular, but may be trapezoidal or U-shaped.
As shown in fig. 7, a construction method of a fully-prefabricated steel pipe concrete space truss-UHPC waffle slab composite beam includes the following steps:
(1) processing, manufacturing and installing the steel pipe concrete space truss: dividing the processed steel pipe into an upper chord member, a web member and a lower chord member, respectively carrying out the step of whether concrete is poured or not, respectively assembling the upper chord member, the web member and the lower chord member into a standard beam segment, a pier negative bending moment segment and a node segment, pre-tightening different segments through flange bolts and prefabricated nodes to form an integral space truss or a partial space truss, positioning and welding a shear groove connecting piece on the steel pipe concrete space truss, and then transporting to the site;
(2) prefabricating and transporting the UHPC waffle bridge deck: dividing the bridge deck into a plurality of bridge deck units according to the width and the span of the bridge deck, pouring UHPC waffle bridge deck units with different sizes and provided with shear grooves and tooth-shaped joints in a specified template system, removing the template after 72-hour normal-temperature maintenance, performing 72-hour steam maintenance, and conveying the bridge deck to a site after the maintenance is finished;
(3) pouring a shear groove and a wet joint: and finally tightening the flange bolts of the steel pipe space truss, respectively hoisting the steel pipe concrete space truss and the bridge deck slab to specified positions, pouring a shear groove to connect the truss and the bridge deck slab through a connecting piece, and pouring longitudinal and transverse wet joints to connect different bridge deck slab units into a whole. The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. The full-prefabricated steel pipe concrete space truss-UHPC waffle slab combination beam comprises a prefabricated steel pipe concrete space truss, wherein the steel pipe concrete space truss is formed by mutually splicing flange bolts and prefabricated nodes, a prefabricated UHPC waffle slab is placed above the steel pipe concrete space truss, and the prefabricated UHPC waffle slab and the steel pipe concrete space truss are mutually connected through a shear groove connecting piece.
2. The fully-prefabricated steel pipe concrete space truss-UHPC waffle slab composite beam as claimed in claim 1, wherein the cross section of the steel pipe concrete space truss is single-row, single-row and multi-row, multi-row and multi-row.
3. The fully-prefabricated concrete-filled steel tube space truss-UHPC waffle slab composite beam as claimed in claim 1, wherein the cross-sectional shape of the concrete-filled steel tube space truss is three-limb, namely triangular, four limbs, namely rectangular or five limbs, namely trapezoidal.
4. The fully prefabricated concrete-filled steel tube space truss-UHPC waffle slab composite beam as claimed in claim 1, wherein the concrete-filled steel tube space truss is composed of an upper chord, a web member and a lower chord, and is divided into a standard beam section, a hogging moment section and a node section, wherein only the lower chord of the standard beam section is poured with concrete, and the upper chord and the lower chord of the hogging moment section are both poured with concrete.
5. The fully-prefabricated concrete-filled steel tube space truss-UHPC waffle slab composite beam as claimed in claim 1, wherein the steel tubes in the concrete-filled steel tube space truss are round steel tubes, rectangular steel tubes or trapezoidal steel tubes.
6. The fully prefabricated concrete-filled steel tube space truss-UHPC waffle slab composite beam as claimed in claim 1, wherein a stiffening structure consisting of studs or perforated steel plates is arranged in the concrete-filled steel tube space truss.
7. The fully prefabricated concrete filled steel tube space truss-UHPC waffle slab composite beam as claimed in claim 1, wherein the shear groove connectors are tenon type connectors or group nail shear connectors.
8. The fully prefabricated concrete filled steel tube space truss-UHPC waffle slab composite beam as claimed in claim 1, wherein the cross section of the prefabricated UHPC waffle slab is rectangular, trapezoidal or U-shaped.
9. The construction method of the fully prefabricated steel tube concrete space truss-UHPC waffle slab combination beam as claimed in claim 1, comprising the following steps:
(1) processing, manufacturing and installing the steel pipe concrete space truss: dividing the processed steel pipe into an upper chord member, a web member and a lower chord member, respectively splicing the upper chord member, the web member and the lower chord member into a standard beam segment, a pier negative bending moment segment and a node segment according to the requirement of whether concrete is poured or not, pre-tightening different segments through flange bolts and prefabricated nodes to splice an integral space truss or a partial space truss, positioning and welding a shear groove connecting piece on the steel pipe concrete space truss, and then transporting to the site;
(2) prefabricating and transporting the UHPC waffle bridge deck: dividing the bridge deck into a plurality of bridge deck units according to the width and the span of the bridge deck, pouring UHPC waffle bridge deck units with different sizes and provided with shear grooves and tooth-shaped joints in a specified template system, removing the template after 72-hour normal-temperature maintenance, performing 72-hour steam maintenance, and conveying the bridge deck to a site after the maintenance is finished;
(3) pouring a shear groove and a wet joint: and finally tightening the flange bolts of the steel pipe concrete space truss, respectively hoisting the steel pipe concrete space truss and the UHPC waffle bridge deck to specified positions, pouring a shear groove to connect the truss and the bridge deck through a shear groove connecting piece, and pouring longitudinal and transverse wet joints to connect different UHPC waffle bridge deck units into a whole.
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| CN201910581517.7A CN110725193A (en) | 2019-06-29 | 2019-06-29 | Full-prefabricated steel pipe concrete space truss-UHPC waffle slab composite beam and construction method |
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| CN201910581517.7A CN110725193A (en) | 2019-06-29 | 2019-06-29 | Full-prefabricated steel pipe concrete space truss-UHPC waffle slab composite beam and construction method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112942050A (en) * | 2021-02-05 | 2021-06-11 | 中铁大桥勘测设计院集团有限公司 | Combination beam without upper flat connection steel truss girder and construction method |
| CN113106845A (en) * | 2021-05-20 | 2021-07-13 | 中南大学 | Assembled tie bar rectangular steel tube concrete truss composite beam and construction method thereof |
| CN113389217A (en) * | 2021-02-10 | 2021-09-14 | 国机集团科学技术研究院有限公司 | Method for designing micro-vibration-proof base of precision exposure and coating equipment |
| CN114703734A (en) * | 2022-04-01 | 2022-07-05 | 山东高速集团有限公司创新研究院 | Steel-concrete combined beam bridge and construction method |
| CN114934434A (en) * | 2022-06-27 | 2022-08-23 | 四川省交通勘察设计研究院有限公司 | Prefabricated steel truss concrete small box girder and prefabricated assembled type combined girder bridge comprising same |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202055171U (en) * | 2011-04-01 | 2011-11-30 | 深圳市市政设计研究院有限公司 | Multi-chord combined beam structure |
| CN103821087A (en) * | 2014-03-07 | 2014-05-28 | 天津城建大学 | Precast bridge deck space steel pipe concrete truss composite beam and construction method |
| CN104831617A (en) * | 2015-05-26 | 2015-08-12 | 福州大学 | Steel-super high performance concrete composite beam based on ribbed plate type bridge deck and construction method |
| CN207973983U (en) * | 2018-02-08 | 2018-10-16 | 湖南工业大学 | It can rapidly-assembled precast bridge |
| KR20190041276A (en) * | 2017-10-12 | 2019-04-22 | 한국교통대학교산학협력단 | Thrust Structure Using Double Steel Tube and Construction Method Therefor |
-
2019
- 2019-06-29 CN CN201910581517.7A patent/CN110725193A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202055171U (en) * | 2011-04-01 | 2011-11-30 | 深圳市市政设计研究院有限公司 | Multi-chord combined beam structure |
| CN103821087A (en) * | 2014-03-07 | 2014-05-28 | 天津城建大学 | Precast bridge deck space steel pipe concrete truss composite beam and construction method |
| CN104831617A (en) * | 2015-05-26 | 2015-08-12 | 福州大学 | Steel-super high performance concrete composite beam based on ribbed plate type bridge deck and construction method |
| KR20190041276A (en) * | 2017-10-12 | 2019-04-22 | 한국교통대학교산학협력단 | Thrust Structure Using Double Steel Tube and Construction Method Therefor |
| CN207973983U (en) * | 2018-02-08 | 2018-10-16 | 湖南工业大学 | It can rapidly-assembled precast bridge |
Non-Patent Citations (2)
| Title |
|---|
| 李亚东: "《桥梁工程概论（第三版）》", 28 February 2014, 西南交通大学出版社 * |
| 罗世东等: "《铁路钢箱混合组合梁斜拉桥》", 31 December 2017, 中国铁道出版社 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112942050A (en) * | 2021-02-05 | 2021-06-11 | 中铁大桥勘测设计院集团有限公司 | Combination beam without upper flat connection steel truss girder and construction method |
| CN113389217A (en) * | 2021-02-10 | 2021-09-14 | 国机集团科学技术研究院有限公司 | Method for designing micro-vibration-proof base of precision exposure and coating equipment |
| CN113389217B (en) * | 2021-02-10 | 2022-09-20 | 国机集团科学技术研究院有限公司 | Method for designing micro-vibration-proof base of precision exposure and coating equipment |
| CN113106845A (en) * | 2021-05-20 | 2021-07-13 | 中南大学 | Assembled tie bar rectangular steel tube concrete truss composite beam and construction method thereof |
| WO2022241814A1 (en) * | 2021-05-20 | 2022-11-24 | 中南大学 | Fabricated tie bar rectangular steel tube concrete truss composite beam and construction method therefor |
| CN114703734A (en) * | 2022-04-01 | 2022-07-05 | 山东高速集团有限公司创新研究院 | Steel-concrete combined beam bridge and construction method |
| CN114703734B (en) * | 2022-04-01 | 2024-02-02 | 山东高速集团有限公司创新研究院 | Steel-concrete composite girder bridge and construction method |
| CN114934434A (en) * | 2022-06-27 | 2022-08-23 | 四川省交通勘察设计研究院有限公司 | Prefabricated steel truss concrete small box girder and prefabricated assembled type combined girder bridge comprising same |
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