CN103758033A - Integrated assembly type hollow slab bridge and construction method thereof - Google Patents
Integrated assembly type hollow slab bridge and construction method thereof Download PDFInfo
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- CN103758033A CN103758033A CN201310741427.2A CN201310741427A CN103758033A CN 103758033 A CN103758033 A CN 103758033A CN 201310741427 A CN201310741427 A CN 201310741427A CN 103758033 A CN103758033 A CN 103758033A
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Abstract
The invention belongs to the technical filed of construction of hollow slab bridges and particularly discloses an integrated assembly type hollow slab bridge and a construction method thereof. The integrated assembly type hollow slab bridge comprises two hollow slab edge plates which are oppositely arranged; hollow slab middle plates are laid between the two hollow slab edge plates continuously; tongue-and-groove seam concrete is arranged between the adjacent hollow slabs; a plurality of shear resistant blocks are arranged on the bilateral sides of the tongue-and-groove seam concrete along the slab height; the shear resistant blocks which are longitudinally continuous are groove-shaped or protruding-edge-shaped; the groove-shaped shear resistant blocks and the protruding-edge-shaped shear resistant blocks are alternately arranged when the number of the shear resistant blocks is more than two. The construction method comprises determining the number and the shape of the tongue-and-groove seam shear resistant blocks according to the design requirements; forming the grooves or the protruding edges which are longitudinally continuous on the inner sides of formworks which are arranged at the positions of tongue-and-groove seams along the slab height correspondingly; precasting the hollow slabs, hoisting the hollow slabs and performing cast-in-site construction on the tongue-and-groove seam concrete. According to the integrated assembly type hollow slab bridge and the construction method thereof, the practicability is strong, the construction is convenient, the shear resistance between the hollow slabs can be improved, and the integral mechanical performance of the hollow slab bridge can be improved.
Description
Technical field
The invention belongs to blank board bridge building technology field, relate in particular to a kind of assembled integral hollow slab bridge and construction method thereof.
Background technology
At present, single span is the Middle Or Small Span footpath highway bridge within the scope of 5m～30m across footpath, conventionally adopts the form of structure of steel concrete or prestressed concrete assembling hollow slab bridge.Hollowcore slab is prefabricated in Huo Liang factory of precast yard, the on-the-spot erection construction of bridge location, hollowcore slab cross section is generally single hole or diplopore section form, and prefabricated concrete hollow slab generally adopts pre-tensioning system, along plate, prestressed reinforcement is longitudinally set, hollowcore slab side is fold-line-shaped, and reserved ribbet reinforcing bar.Its construction method is first by prefabricated hollowcore slab hoisted in position, and then the ribbet position concreting between adjacent vacant core, is laterally connected to become integral body by each piece hollowcore slab along bridge by ribbet reinforcing bar and concrete.Owing to only depending on ribbet reinforcing bar to be connected with concrete between adjacent vacant core, Transfer of Shear limited in one's ability, poor along bridge transverse integral, bridge deck are prone in ribbet position Yan Qiao crack longitudinally, cause vehicle pitching, affect normal use and the durability of bridge, when situation is serious, there will be veneer stressed, to the current safety of bridge and structure durability, bury hidden trouble.
Summary of the invention
For overcoming the deficiencies in the prior art part, the object of the present invention is to provide a kind of assembled integral hollow slab bridge and construction method thereof, there is stronger exploitativeness, easy construction, can improve shear behavior between hollowcore slab, improve blank board bridge holistic resistant behavior.
For achieving the above object, the present invention adopts following technical scheme:
A kind of assembled integral hollow slab bridge, comprise the two hollowcore slab side plates that are oppositely arranged, between two hollowcore slab side plates, continuous laying has plate in hollowcore slab, between adjacent vacant core, (be in hollowcore slab side plate and hollowcore slab between plate, in two hollowcore slabs between plate) is provided with ribbet concrete, the concrete both sides of ribbet are provided with several shearing-resistance blocks along plate hight, described shearing-resistance blocks is longitudinal elongated groove type or protruding stupefied shape, and when shearing-resistance blocks quantity is when more than two, groove type and protruding stupefied shape shearing-resistance blocks are and are arranged alternately.
Further, the shearing-resistance blocks of ribbet concrete both sides is preferably symmetrical set.
Further again, the quantity of shearing-resistance blocks is 1～3.
Further, the height of (below) shearing-resistance blocks is not less than 5cm.
The construction method of above-mentioned assembled integral hollow slab bridge, comprises the following steps:
(1) prefabricated reinforced concrete or prefabricated concrete hollow slab: quantity and the shape of first by designing requirement, determining ribbet shearing-resistance blocks, then in ribbet position template inner side along longitudinal elongated groove (corresponding protruding stupefied shape shearing-resistance blocks) or protruding stupefied (the respective slot shape shearing-resistance blocks) of plate hight relative set, last according to the common process of steel concrete or prestressed concrete (reinforced concrete hollow slab: first assembling reinforcement skeleton, after-pouring hollowcore slab concrete; Pretensioning prestressed concrete hollowcore slab: first apply longitudinal prestressing steel bundle, after-pouring hollowcore slab concrete; Post stressed concrete hollowcore slab: first build the beam body of longitudinal prestressing steel bundle preformed hole, then build hollowcore slab concrete, lashing stretch-draw longitudinal prestressing steel bundle after maintenance) precast hollow slab, and reserved ribbet connecting reinforcement;
(2) lifting hollowcore slab: the prefabricated hollowcore slab completing is transported to bridge construction place hoisted in position;
(3) ribbet concrete cast-in-situ construction: arrange and the connecting reinforcement being connected between hollowcore slab ribbet, cast-in-place ribbet concrete also vibrates, and guarantees the concrete construction quality of ribbet, finally completes whole bridge span structure construction according to common process.
Preferably, in step (1), described template is steel form or wooden form, and protruding stupefied shape shearing-resistance blocks correspondence is respectively that rectangle and trapezium channel section steel is stupefied, the solid batten in square-section.
Better, the preferred bakelite template of described wooden form.
Preferably, in step (3), ribbet cast-in-situ concrete strength grade is not less than 90% of hollowcore slab concrete strength.
The invention provides a kind of assembled integral hollow slab bridge and construction method thereof.When hollowcore slab is prefabricated in precast yard, longitudinally elongated groove or protruding stupefied is set in the inner side of ribbet template, the longitudinal prestressing reinforcing bar of prefabricated concrete hollow slab still adopts pre-tensioning system or post-tensioned construction.After each piece hollowcore slab hoisted in position of full-bridge, arrange and the connecting reinforcement being connected between hollowcore slab ribbet, build ribbet concrete and vibrate, should notice that shearing-resistance blocks position is concrete to build, guarantee the concrete construction quality of ribbet.By shearing and ribbet concrete Transfer of Shear that longitudinally elongated shearing-resistance blocks produces between adjacent vacant core lateral plates, replace only relying on merely in traditional construction method ribbet Transfer of Shear, thereby improve shear behavior and structural entity stress performance between hollowcore slab.The present invention does not need existing equipment to carry out large change when prefabricated assembled hollowcore slab, constant to personnel's technical requirements, and construction technology process is almost constant.Adopt in ribbet and set up shearing-resistance blocks, only prefab form is simply processed, construct workable, increase hardly construction cost, the object that can realize lateral ties, homogenizing load cross direction profiles between Transfer of Shear between adjacent vacant core, raising assembling hollowcore slab, reaches and improves assembling hollow slab bridge holistic resistant behavior object.
Positive beneficial effect of the present invention is:
(1) by shearing and ribbet concrete Transfer of Shear that longitudinally elongated shearing-resistance blocks produces between adjacent vacant core side, overcome and in traditional hollow slab bridge construction method, only depend on that hollowcore slab ribbet concrete Transfer of Shear, transverse integral are poor, bridge deck are prone to the shortcoming along bridge longitudinal crack in hollowcore slab ribbet position, thereby improve shear behavior and structural entity stress performance between hollowcore slab.
(2) between hollowcore slab, the size of Shear transfer is relevant with ribbet anti-shear concrete number of blocks, can be according to the difference across footpath and plate hight of hollowcore slab, 1～3 shearing-resistance blocks is set to meet the different shearing resistance requirements of structure, solves between traditional handicraft hollow core the weak and single shortcoming of ribbet shear resistance.
(3), by increasing longitudinal elongated shearing-resistance blocks in the template at ribbet position, to homogenizing load cross direction profiles, the holistic resistant behavior of raising hollow slab bridge under Vehicle Load, can play advantageous effect.
(4) the prefabricated and construction technology of traditional hollowcore slab does not change substantially, constant to personnel's technical requirements, and in the template at ribbet position, the steel of welding groove tee section is stupefied or the easy construction of permanent moment tee section batten is feasible.
(5) the present invention is applicable to the various prestressed concretes across footpath or steel reinforced concrete assembling hollow slab bridge.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention, in figure: 1 is single hole hollowcore slab side plate; 2 is plate in single hole hollowcore slab; 3 is ribbet concrete; 4 is shearing-resistance blocks.
Fig. 2 is the 1/2 I-I profile of Fig. 1.
Fig. 3 is the enlarged drawing of a-quadrant in Fig. 2.
The specific embodiment
Embodiment:
A kind of assembled integral hollow slab bridge, comprise the two hollowcore slab side plates that are oppositely arranged, between two hollowcore slab side plates, continuous laying has plate in hollowcore slab, between adjacent vacant core, (be in hollowcore slab side plate and hollowcore slab between plate, in two hollowcore slabs between plate) is provided with ribbet concrete, the concrete both sides of ribbet are provided with 1～3 shearing-resistance blocks along plate hight, the height of (below) shearing-resistance blocks is not less than 5cm, described shearing-resistance blocks is longitudinal elongated groove type or protruding stupefied shape, and when shearing-resistance blocks quantity is when more than two, groove type and protruding stupefied shape shearing-resistance blocks are and are arranged alternately.
The construction method of above-mentioned assembled integral hollow slab bridge, comprises the following steps:
(1) prefabricated reinforced concrete or prefabricated concrete hollow slab: quantity and the shape of first by designing requirement, determining ribbet shearing-resistance blocks, then in ribbet position steel form inner side, along corresponding the striking of plate hight, to caving in, form longitudinally elongated groove (corresponding protruding stupefied shape shearing-resistance blocks) or weld longitudinally elongated rectangle and trapezium channel section steel stupefied (respective slot shape shearing-resistance blocks), the stupefied total quantity of groove and steel is 1～3, height at the bottom of (below) groove or the stupefied distance from bottom Method Pre-stress Concrete Hollow Slab of steel is not less than 5cm, if adopt wooden form or bakelite template, can be at the solid batten of above-mentioned position permanent moment tee section, last according to the common process of steel concrete or prestressed concrete (reinforced concrete hollow slab: first assembling reinforcement skeleton, after-pouring hollowcore slab concrete, pretensioning prestressed concrete hollowcore slab: first apply longitudinal prestressing steel bundle, after-pouring hollowcore slab concrete, post stressed concrete hollowcore slab: first build the beam body of longitudinal prestressing steel bundle preformed hole, then build hollowcore slab concrete, lashing stretch-draw longitudinal prestressing steel bundle after maintenance) precast hollow slab, and reserved ribbet connecting reinforcement,
(2) lifting hollowcore slab: the prefabricated hollowcore slab completing is transported to bridge construction place hoisted in position;
(3) ribbet concrete cast-in-situ construction: arrange and the connecting reinforcement being connected between hollowcore slab ribbet, cast-in-place ribbet concrete vibrate (ribbet cast-in-situ concrete strength grade be not less than hollowcore slab concrete strength 90%), should notice that shearing-resistance blocks position is concrete and build, guarantee the concrete construction quality of ribbet, finally according to common process, complete whole bridge span structure construction.
During concrete enforcement, can adopt following embodiment:
As shown in Figures 1 to 3, a kind of assembled integral hollow slab bridge, comprise the two hollowcore slab side plates 1 that are oppositely arranged, between two hollowcore slab side plates 1, continuous laying has plate 2 in four hollowcore slabs, between adjacent vacant core, (be in hollowcore slab side plate 1 and hollowcore slab between plate 2, in two hollowcore slabs between plate 2) is provided with ribbet concrete 3, the both sides of ribbet concrete 3 are arranged with two longitudinal elongated shearing-resistance blocks 4 along plate hight: from the bottom to top, be followed successively by groove type, protruding stupefied shape, the height at the bottom of (below) groove type shearing-resistance blocks 4 distance from bottom Method Pre-stress Concrete Hollow Slabs is not less than 5cm.
Construction method:
(1) according to design parameterss such as bridge class, span, bridge deck widths, carry out hollow slab bridge structural analysis, the sectional dimension of calculative determination hollowcore slab, plain bars and longitudinal prestressing reinforcing bar, and be two according to the quantity of shear Design requirement calculative determination ribbet shearing-resistance blocks between adjacent vacant core.
(2) according to designing requirement precast hollow slab, as build hollow slab bridge as shown in Fig. 1～3 and need altogether plate 2 in prefabricated two single hole hollowcore slab side plates 1 and four single hole hollowcore slabs, wherein two single hole hollowcore slab side plate 1 outer side edges are straight line, single hole hollowcore slab side plate 1 ribbet steel form inner side is along plate hight from the bottom to top: longitudinally the steel of elongated channel section is stupefied first to weld one, and the height of the stupefied distance from bottom hollowcore slab of steel punching block bottom is not less than 5cm, then beats steel form and to caving in, form a longitudinal elongated groove; Assembling reinforcement skeleton, adopts pre-tensioning system technique to apply longitudinal prestressing reinforcing bar, builds hollowcore slab concrete, is prefabricated into single hole hollowcore slab side plate 1, and reserved ribbet connecting reinforcement; In single hole hollowcore slab, plate 2 ribbet steel form inner sides along plate hight from the bottom to top: the steel that first welds a longitudinal elongated channel section is stupefied, and the height of the stupefied distance from bottom hollowcore slab of steel punching block bottom is not less than 5cm, then beats steel form and to caving in, form a longitudinal elongated groove; Assembling reinforcement skeleton, adopts pre-tensioning system technique to apply longitudinal prestressing reinforcing bar, builds hollowcore slab concrete, is prefabricated into plate 2 in single hole hollowcore slab, and reserved ribbet connecting reinforcement.
(3) plate 2 in prefabricated two single hole hollowcore slab side plates 1 that complete and four single hole hollowcore slabs is transported to bridge site hoisted in position, arranges and the connecting reinforcement that is connected ribbet position.
(4) arrange and the connecting reinforcement being connected between hollowcore slab ribbet, cast-in-situ concrete, forms ribbet concrete 3 and shearing-resistance blocks 4, cast-in-place ribbet concrete 3 intensity are not less than 90% of hollowcore slab concrete strength, notice that building of shearing-resistance blocks 4 is closely knit, concrete curing, guarantees construction quality.
The above specific embodiment is that the single span hollow slab bridge forming in conjunction with 6 single hole hollowcore slabs shown in Fig. 1～3 describes, and the present invention is equally applicable to adopt the single span of other borehole section forms, other hollowcore slab quantity or multispan assembling hollow slab bridge to build.
Claims (8)
1. an assembled integral hollow slab bridge, it is characterized in that: comprise the two hollowcore slab side plates that are oppositely arranged, between two hollowcore slab side plates, continuous laying has plate in hollowcore slab, between adjacent vacant core, be provided with ribbet concrete, the concrete both sides of ribbet are provided with several shearing-resistance blocks along plate hight, described shearing-resistance blocks is longitudinal elongated groove type or protruding stupefied shape, and when shearing-resistance blocks quantity is when more than two, and groove type and protruding stupefied shape shearing-resistance blocks are and are arranged alternately.
2. assembled integral hollow slab bridge as claimed in claim 1, is characterized in that: the shearing-resistance blocks of ribbet concrete both sides is symmetrical set.
3. assembled integral hollow slab bridge as claimed in claim 2, is characterized in that: the quantity of shearing-resistance blocks is 1～3.
4. assembled integral hollow slab bridge as claimed in claim 3, is characterized in that: the height of shearing-resistance blocks is not less than 5cm.
5. a method for the assembled integral hollow slab bridge of construction as described in any one of claim 1～4, is characterized in that comprising the following steps:
Prefabricated reinforced concrete or prefabricated concrete hollow slab: quantity and the shape of first by designing requirement, determining ribbet shearing-resistance blocks, then in ribbet position template inner side along the longitudinal elongated groove or protruding stupefied of plate hight relative set, last according to the common process precast hollow slab of steel concrete or prestressed concrete, and reserved ribbet connecting reinforcement;
(2) lifting hollowcore slab: the prefabricated hollowcore slab completing is transported to bridge construction place hoisted in position;
(3) ribbet concrete cast-in-situ construction: arrange and the connecting reinforcement being connected between hollowcore slab ribbet, cast-in-place ribbet concrete also vibrates, and guarantees the concrete construction quality of ribbet, finally completes whole bridge span structure construction according to common process.
6. construction method as claimed in claim 5, is characterized in that: in step (1), described template is steel form or wooden form, and protruding stupefied shape shearing-resistance blocks correspondence is respectively that rectangle and trapezium channel section steel is stupefied, the solid batten in square-section.
7. construction method as claimed in claim 5, is characterized in that: described wooden form is bakelite template.
8. construction method as claimed in claim 5, is characterized in that: in step (3), ribbet cast-in-situ concrete strength grade is not less than 90% of hollowcore slab concrete strength.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310741427.2A CN103758033A (en) | 2013-12-30 | 2013-12-30 | Integrated assembly type hollow slab bridge and construction method thereof |
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| CN201310741427.2A CN103758033A (en) | 2013-12-30 | 2013-12-30 | Integrated assembly type hollow slab bridge and construction method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105088937A (en) * | 2014-05-08 | 2015-11-25 | 郑州大学 | Hollow slab bridge with hinge joint having opposite grooves and building method of hollow slab bridge |
| CN108221637A (en) * | 2018-01-10 | 2018-06-29 | 湖南大学 | A kind of prefabricated assembled arch |
| CN108374356A (en) * | 2018-05-10 | 2018-08-07 | 山东交通学院 | A kind of old hollow slab bridge of hinge seam longitudinal prestressing reinforcing single hole constructs and construction method |
| CN112663494A (en) * | 2020-12-07 | 2021-04-16 | 辽宁省交通规划设计院有限责任公司 | Composite beam bridge deck and construction method thereof |
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| KR100903985B1 (en) * | 2004-03-24 | 2009-06-25 | 주식회사 삼표 | Shear key for precast concrete hollow slab |
| CN102733299A (en) * | 2012-07-13 | 2012-10-17 | 福州大学 | Novel assembly type steel concrete simple supported slab bridge hinge joint and construction method thereof |
| CN202595616U (en) * | 2012-04-13 | 2012-12-12 | 长沙理工大学 | Concrete bridge with durable hinge joint device |
| CN203639814U (en) * | 2013-12-30 | 2014-06-11 | 郑州大学 | Assembled monolithic hollow slab bridge |
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2013
- 2013-12-30 CN CN201310741427.2A patent/CN103758033A/en active Pending
Patent Citations (4)
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| KR100903985B1 (en) * | 2004-03-24 | 2009-06-25 | 주식회사 삼표 | Shear key for precast concrete hollow slab |
| CN202595616U (en) * | 2012-04-13 | 2012-12-12 | 长沙理工大学 | Concrete bridge with durable hinge joint device |
| CN102733299A (en) * | 2012-07-13 | 2012-10-17 | 福州大学 | Novel assembly type steel concrete simple supported slab bridge hinge joint and construction method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105088937A (en) * | 2014-05-08 | 2015-11-25 | 郑州大学 | Hollow slab bridge with hinge joint having opposite grooves and building method of hollow slab bridge |
| CN108221637A (en) * | 2018-01-10 | 2018-06-29 | 湖南大学 | A kind of prefabricated assembled arch |
| CN108374356A (en) * | 2018-05-10 | 2018-08-07 | 山东交通学院 | A kind of old hollow slab bridge of hinge seam longitudinal prestressing reinforcing single hole constructs and construction method |
| CN112663494A (en) * | 2020-12-07 | 2021-04-16 | 辽宁省交通规划设计院有限责任公司 | Composite beam bridge deck and construction method thereof |
| CN112663494B (en) * | 2020-12-07 | 2022-04-08 | 辽宁省交通规划设计院有限责任公司 | Composite beam bridge deck and construction method thereof |
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Application publication date: 20140430 |