CN103924505A - Prefabricated steel-concrete combination T beam with corrugated steel web and construction method - Google Patents
Prefabricated steel-concrete combination T beam with corrugated steel web and construction method Download PDFInfo
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Abstract
The invention discloses a prefabricated steel-concrete combination T beam with a corrugated steel web and a construction method. A plurality of prefabricated steel-concrete combination T beam section units (4) formed by combination of H-shaped wave-shaped steel web steel beams (1) and concrete bridge face plates (3) are included. Adjacent combination T beam section units (4) form a whole through a longitudinal connecting section (5) and a beam end wet joint horizontal beam (11). The advantages of a traditional steel-concrete combination beam structure with a flat steel plate are achieved, the stability of the web and be improved, influence of concrete shrinkage and creep is avoided, meanwhile, the shortcoming of a current construction method of the steel-concrete combination beam can be effectively overcome, and the prefabricated steel-concrete combination T beam has the advantages of being convenient to convey, easy to assemble, small in site welding amount, small in concrete placing amount, high in construction speed, small in influence on ground traffic and the like.
Description
Technical field
The invention belongs to the bridge technology field of highway and urban road, what relate generally to is prefabricated steel-concrete combination T beam and the construction method that adopts Wavelike steel webplate.
Background technology
The full welded steel beam of I shape is lightweight, bearing capacity is large, be widely used, but the web of this i-shape steel beam all adopts plain plate for a long time with the compound beam of concrete slab composition in highway and Urban Bridge, and advantage is that between plain plate, welding is relatively simple; Shortcoming is that plain plate welding residual stress is large, need to adopt more stiffening rib to improve Web Stability, and prestressing force efficiency is low, and the shrinkage and creep of concrete slab can cause extra subsidiary stress to girder steel, and the concrete of position of the fulcrum is easy to crack.
The construction method of steel-concrete composite beam mainly contains two kinds at present, and one is full span erection method, and set up in the whole hole of the method, advantage is that speed of application is fast, shortcoming be beam length between 25m ~ 40m, transport difficulty is large, erection process is prone to stability problem, and practical application is little; Another is full framing method, the method is at regular intervals, set up passive scaffold, form operating platform, then girder steel is installed on support and is welded, then fluid concrete top board, the method advantage is not need Large-scale Hoisting equipment, on support, carry out segment girder steel welding coupling, solved the problem of long beam transport, shortcoming is that the construction period is long, Site Welding amount is large, full framing affects traffic above-ground and surrounding enviroment.
Summary of the invention
The present invention is directed to the deficiency that existing Steel-concrete Combined Beam Structures form and construction method exist, proposed to adopt prefabricated steel-concrete combination T beam and the construction method of Wavelike steel webplate.Both there is traditional Steel-concrete Combined Beam Structures, can improve again the stability and the impact of avoiding concrete shrinkage and creep of web, simultaneously can effectively overcome the deficiency existing in the current construction method of steel-concrete composite beam, there is convenient transportation, be easy to assembling, Site Welding amount is little, concreting amount is little, speed of application fast, to remarkable advantages such as ground traffic impact are little.
The technical scheme that the present invention takes is for achieving the above object: the prefabricated steel-concrete combination T beam that adopts Wavelike steel webplate, comprise the prefabricated steel-concrete combination T beam beam segment unit that multiple I shape Wavelike steel webplate girder steels and concrete slab combine, adjacent beams segment unit forms entirety by junction steel plate and the wet seam of concreting.
Prefabricated steel-concrete combination T beam beam segment unit of the present invention is prefabricated T-shaped section beam.
Horizontal connecting reinforcement by Prefabricated composite beam element between the concrete slab of Prefabricated composite beam element of the present invention is connected with the wet seam of horizontal concrete, is connected by longitudinal connecting reinforcement of Prefabricated composite beam element and the wet seam crossbeam of beam-ends.
Longitudinal link position of I shape Wavelike steel webplate girder steel of the present invention is at falsework top.
The present invention realizes the construction method of the prefabricated steel-concrete combination T beam that adopts Wavelike steel webplate, is first prefabricated in the factory containing the steel-concrete combination T beam of Wavelike steel webplate; Secondly, construct permanent abutment and bridge pier, set up falsework form limited bracket system at bridge pier place at bridge location place, the segmentation of the steel-concrete that prefabrication is completed combination T beam is arranged on strutting system, compound beam in length and breadth to being reserved with connecting reinforcement; Then, prefabricated steel-concrete is combined to the vertical and horizontal steel work part of T beam and carry out bolt or welding, to form beam lattice system; Finally, prefabricated steel-concrete is combined to carrying out colligation and be welded to connect to reserved steel bar in length and breadth of T beam, the wet seam of the horizontal concrete of cast Prefabricated composite beam element top board and the wet seam crossbeam of beam-ends complete the connection construction between beam body after concrete strength reaches requirement, remove falsework.
The present invention realizes the construction method of the prefabricated steel-concrete combination T beam that adopts Wavelike steel webplate, the prefabricated process of described steel-concrete combination T beam beam segment unit is, I shape Wavelike steel webplate girder steel is put smooth, Shear connection key between I shape Wavelike steel webplate girder steel top flange welding concrete and girder steel, by the reinforcing bar in concrete roof and the colligation of Shear connection key or weld together, lay concrete roof template, the concrete slab of cast Prefabricated composite beam element also carries out maintenance, concrete reaches intensity stripping, complete steel-concrete combination T beam beam segment unit prefabricated,
The present invention described set up and concreting process in girder steel is carried out temporary fixed, I shape Wavelike steel webplate girder steel is laterally connected to form beam lattice system by laterally interim.
The present invention is complete in described I shape Wavelike steel webplate girder steel connection, the wet seam crossbeam of composite beams beam-ends carries out small size jacking to the fulcrum of falsework before pouring into a mould, then the wet seam crossbeam of cast, after concrete strength reaches requirement, the fulcrum of falsework is resetted, distribute to adjust the internal force of optimizing between girder steel and concrete slab.
The present invention has following advantage compared with prior art:
(1) beam section simple structure, dimensional standard is unified, is easy to factory normalization prefabricated, meets conventional movement requirement, has avoided the long wide construction bringing of beam body and transportation problem, and exploitativeness is improved;
(2) base plate tensile zone adopts steel work, and top board pressurized zone adopts concrete structure, and the easy unstability of web region adopts corrugated sheet steel structure, takes full advantage of the characteristic of multiple material or structure, and stock utilization is high, and anti-flexion capabilities significantly improves;
(3) beam body weight is light, adopts small mechanical equipment just can complete lifting construction, and the connecting portion of cooperation limited bracket construction method can multiple spot concurrent construction, operation is few, and site operation workload is little, and it is fast that speed is set up in construction, limited bracket is little to ground area occupied, little to original traffic impact.
Brief description of the drawings
Fig. 1 is prefabricated steel-concrete combination T beam construction sequence figure ().
Fig. 2 is prefabricated steel-concrete combination T beam construction sequence figure (two).
Fig. 3 is the elevation of prefabricated steel-concrete combination T beam rigging out.
Fig. 4 is the longitudinal linkage section partial enlarged drawing between I shape Wavelike steel webplate girder steel.
Fig. 5 is prefabricated steel-concrete combination T beam construction sequence figure (three).
Fig. 6 is the cross-sectional drawing of Fig. 5.
Fig. 7 is the wet seam connection diagram of the non-crossbeam of Fig. 5 position.
Fig. 8 is the wet seam connection diagram of Fig. 5 crossbeam position.
Fig. 9 is prefabricated steel-concrete combination T beam construction sequence figure (four).
In figure: 1, I shape Wavelike steel webplate girder steel (1-1, base plate; 1-2, web; 1-3, top board); 2, steel-concrete Shear connection key; 3, concrete slab (the horizontal connecting reinforcement of 3-1; 3-2, longitudinal connecting reinforcement); 4, beam segment unit; 5, longitudinal linkage section; 6, permanent abutment or bridge pier; 7, falsework; 8, laterally interim connection; 9, wet seaming position Shear connection key; 10, connecting bolt or weld seam; 11, wet seam crossbeam; 12, the wet seam of horizontal concrete; 13, manhole.
Detailed description of the invention
By reference to the accompanying drawings, provide embodiments of the invention as follows, but the present invention does not limit to following examples, the present invention also can be used for continuous beam on many supports construction.
As shown in Fig. 1-9: the prefabricated steel-concrete combination T beam of the employing Wavelike steel webplate as described in the present embodiment, comprise multiple prefabricated steel-concrete combination T beam beam segment units 4 that combined by I shape Wavelike steel webplate girder steel 1 and reinforced concrete bridge deck plate 3, adjacent steel-concrete Composite T Beam beam segment unit 4 forms entirety by the longitudinal linkage section 5 between I shape Wavelike steel webplate girder steel and the wet seam crossbeam 11 of building Prefabricated composite beam element beam-ends, described compound beam beam segment unit 4, being laterally reserved with connecting reinforcement 3-1, is longitudinally reserved with connecting reinforcement 3-2.Described I shape Wavelike steel webplate girder steel 1 is made up of plain plate 1-3, the plain plate 1-1 of base plate and the corrugated sheet steel 1-2 of web of top board.Described prefabricated steel-concrete combination T beam beam segment unit 4 is prefabricated T-shaped section beam.The top board 1-3 of described prefabricated steel-concrete combination T beam beam segment unit 4 its I shape Wavelike steel webplate girder steels is connected with the concrete slab 3 of Prefabricated composite beam element by Shear connection key 2.1, the I shape Wavelike steel webplate girder steel of described prefabricated steel-concrete combination T beam beam segment unit 4 in length and breadth to connecting by connecting bolt or weld seam 10.3 of the concrete slabs of described Prefabricated composite beam element are connected with the wet seam 12 of horizontal concrete by horizontal connecting reinforcement 3-1, are connected by the wet seam crossbeam 11 of longitudinal connecting reinforcement 3-2 and beam-ends.The wet seam crossbeam 11 of described beam-ends is reserved with the current manhole 13 of constructability and inspection.On the top board 1-3 of described I shape Wavelike steel webplate girder steel, contain Shear connection key 2, Shear connection key 2 is connected by welding or colligation with reinforcing bar, after concreting, forms entirety with I shape Wavelike steel webplate girder steel.Longitudinal link position of described I shape Wavelike steel webplate girder steel 1 is at falsework 7 tops.
The Specific construction step of the prefabricated steel-concrete combination T beam construction method of above-mentioned employing Wavelike steel webplate is as follows:
First, as shown in Figure 1: steel-concrete combination T beam beam segment unit 4 prefabricated processes are, single I shape Wavelike steel webplate girder steel 1 is put smooth, Shear connection key 2 between I shape Wavelike steel webplate girder steel 1 top flange welding concrete and girder steel, by the reinforcing bar in concrete roof and 2 colligations of Shear connection key or weld together, lay concrete roof template, the concrete slab 3 of cast Prefabricated composite beam element also carries out maintenance, concrete reaches intensity stripping, completes steel-concrete combination T beam beam segment unit 4 prefabricated;
Secondly, as shown in Figure 2,3: construct permanent abutment and bridge pier 6, set up falsework 7 at bridge pier place.Falsework 7 can adopt steel pipe scaffold or shaped steel, steel-concrete combination T beam 4 segmental hoistings that prefabrication is completed are in the limited bracket system that forever abutment or bridge pier 6 and falsework 7 form, compound beam be laterally reserved with connecting reinforcement 3-1, be longitudinally reserved with connecting reinforcement 3-2;
Then, as shown in Fig. 4 ~ 8: longitudinally use connecting bolt or weld seam 10 to connect longitudinal linkage section 5 of 1, I shape Wavelike steel webplate girder steel at the steel-concrete combination T beam 4 having set up; Set up and concreting process in girder steel is carried out temporary fixed, I shape Wavelike steel webplate girder steel 1 is laterally connected to 8 to form beam lattice system by laterally interim, improve the stability of beam body, its form is as shown in Figure 6.
Finally, as shown in Figure 9: the laterally reserved connecting reinforcement 3-1 of combination T beam beam segment unit 4 is carried out to colligation and is welded to connect, the Shear connection key 9 of longitudinally reserving connecting reinforcement 3-2 and composite beams longitudinal wet seaming position is carried out to colligation and is welded to connect, the wet seam 12 of the horizontal concrete of cast combination T beam 4 top board and the wet seam crossbeam 11 of beam-ends, after concrete strength reaches requirement, complete the connection construction between beam body, remove falsework 7.
Except above-mentioned work progress, can before connecting wet seam crossbeam 11 cast of complete, composite beams beam-ends, I shape Wavelike steel webplate girder steel 1 carry out small size jacking to the fulcrum of falsework 7, then the wet seam crossbeam 11 of cast, after concrete strength reaches requirement, the fulcrum of falsework 7 is resetted, distribute to adjust the internal force of optimizing between girder steel and concrete slab.
Claims (8)
1. one kind adopts the prefabricated steel-concrete combination T beam of Wavelike steel webplate, it is characterized in that: comprise the prefabricated steel-concrete combination T beam beam segment unit (4) that multiple I shape Wavelike steel webplate girder steels (1) and concrete slab (3) combine, adjacent combination T beam beam segment unit (4) forms entirety by longitudinal linkage section (5) and the wet seam crossbeam (11) of beam-ends.
2. the prefabricated steel-concrete of employing Wavelike steel webplate according to claim 1 combination T beam, is characterized in that: described prefabricated steel-concrete combination T beam beam segment unit (4) is prefabricated T-shaped section beam.
3. the prefabricated steel-concrete of employing Wavelike steel webplate according to claim 1 combination T beam, it is characterized in that: the horizontal connecting reinforcement (3-1) by Prefabricated composite beam element (4) between the concrete slab (3) of described Prefabricated composite beam element is connected with the wet seam (12) of horizontal concrete, is connected by longitudinal connecting reinforcement (3-2) of Prefabricated composite beam element and the wet seam crossbeam (11) of beam-ends.
4. the prefabricated steel-concrete of employing Wavelike steel webplate according to claim 1 combination T beam, is characterized in that: longitudinal link position of described I shape Wavelike steel webplate girder steel (1) is at falsework (7) top.
5. realize a prefabricated steel-concrete combination T beam construction method that adopts Wavelike steel webplate described in claim 1, it is characterized in that, be first prefabricated in the factory containing the steel-concrete combination T beam (4) of Wavelike steel webplate; Secondly, construct at bridge location place permanent abutment or bridge pier and falsework form limited bracket system, and the segmentation of the steel-concrete that prefabrication is completed combination T beam (4) is arranged on strutting system, compound beam in length and breadth to being reserved with connecting reinforcement (2-1,2-2); Then, prefabricated steel-concrete is combined to the vertical and horizontal steel work part of T beam and carry out bolt or welding, to form beam lattice system; Finally, prefabricated steel-concrete is combined to carrying out colligation and be welded to connect to reserved steel bar in length and breadth of T beam (4), the wet seam (12) of the horizontal concrete of cast Prefabricated composite beam element top board and the wet seam crossbeam (11) of beam-ends, after concrete strength reaches requirement, complete the connection construction between beam body, remove falsework.
6. the prefabricated steel-concrete of employing Wavelike steel webplate according to claim 5 combination T beam construction method, it is characterized in that: the prefabricated process of steel-concrete combination T beam beam segment unit (4) is, I shape Wavelike steel webplate girder steel (1) is put smooth, Shear connection key (2) between I shape Wavelike steel webplate girder steel (1) top flange welding concrete and girder steel, by the reinforcing bar in concrete roof and (2) colligation of Shear connection key or weld together, lay concrete roof template, the concrete slab (3) of cast Prefabricated composite beam element also carries out maintenance, concrete reaches intensity stripping, complete steel-concrete combination T beam beam segment unit (4) prefabricated.
7. the prefabricated steel-concrete of employing Wavelike steel webplate according to claim 5 combination T beam construction method, it is characterized in that: set up and concreting process in girder steel is carried out temporary fixed, by I shape Wavelike steel webplate girder steel (1) laterally by horizontal interim connection (8) to form beam lattice system.
8. the prefabricated steel-concrete of employing Wavelike steel webplate according to claim 5 combination T beam construction method, it is characterized in that: before described I shape Wavelike steel webplate girder steel (1) connects wet seam crossbeam (11) cast of complete, composite beams beam-ends, the fulcrum of falsework (7) is carried out to small size jacking, then the wet seam crossbeam (11) of cast, after concrete strength reaches requirement, the fulcrum of falsework (7) is resetted, distribute to adjust the internal force of optimizing between girder steel and concrete slab.
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| CN201410189813.XA CN103924505B (en) | 2014-05-07 | 2014-05-07 | Use prefabricated steel-concrete combination T beam and the construction method of Wavelike steel webplate |
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| CN104260199A (en) * | 2014-09-26 | 2015-01-07 | 中铁二十局集团第五工程有限公司 | Prefabricating construction process for corrugated steel web prestressed concrete I-shaped beam |
| CN106012791A (en) * | 2016-07-14 | 2016-10-12 | 湖南联智桥隧技术有限公司 | Three-span antinode I-shaped beam-transverse wave-three-steel and concrete combined T-shaped continuous beam |
| CN106049255A (en) * | 2016-07-22 | 2016-10-26 | 邵旭东 | Simple-support variant-continuous structure of steel-ultrahigh performance concrete light composite beam and construction method for same |
| CN106049289A (en) * | 2016-06-30 | 2016-10-26 | 中铁第四勘察设计院集团有限公司 | Construction method for transforming Bailey beam temporary bridge into reinforced concrete combined permanent bridge |
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| CN104260199A (en) * | 2014-09-26 | 2015-01-07 | 中铁二十局集团第五工程有限公司 | Prefabricating construction process for corrugated steel web prestressed concrete I-shaped beam |
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| CN106049289A (en) * | 2016-06-30 | 2016-10-26 | 中铁第四勘察设计院集团有限公司 | Construction method for transforming Bailey beam temporary bridge into reinforced concrete combined permanent bridge |
| CN106012791A (en) * | 2016-07-14 | 2016-10-12 | 湖南联智桥隧技术有限公司 | Three-span antinode I-shaped beam-transverse wave-three-steel and concrete combined T-shaped continuous beam |
| CN106049255A (en) * | 2016-07-22 | 2016-10-26 | 邵旭东 | Simple-support variant-continuous structure of steel-ultrahigh performance concrete light composite beam and construction method for same |
| CN106049255B (en) * | 2016-07-22 | 2018-02-09 | 邵旭东 | The light-duty combination beam Simply supported non-uniform structure construction of steel and ultra-high performance concrete and its construction method |
| CN106638686A (en) * | 2017-03-09 | 2017-05-10 | 河南省交通规划设计研究院股份有限公司 | Comprehensive pipe gallery with corrugated steel plate shear walls and construction method of comprehensive pipe gallery |
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| CN107186878B (en) * | 2017-07-14 | 2023-05-02 | 中铁十四局集团第五工程有限公司 | Adjustable prefabricated U-shaped beam steel bar binding clamping fixture and construction method |
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| CN108316125A (en) * | 2018-02-11 | 2018-07-24 | 中交高新科技产业发展有限公司 | Assembled combination folding web grider bridge |
| CN108221634A (en) * | 2018-03-16 | 2018-06-29 | 中交高新科技产业发展有限公司 | The Wavelike steel webplate I-shaped composite beam bridge of maximum assembling |
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