CN105155399A - Small box girder bridge and building method thereof - Google Patents
Small box girder bridge and building method thereof Download PDFInfo
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- CN105155399A CN105155399A CN201510464675.6A CN201510464675A CN105155399A CN 105155399 A CN105155399 A CN 105155399A CN 201510464675 A CN201510464675 A CN 201510464675A CN 105155399 A CN105155399 A CN 105155399A
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- small box
- box girder
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Abstract
The invention belongs to the field of bridge structural engineering and provides a small box girder bridge and a building method thereof. The small box girder bridge comprises at least two small box girders which are transversely connected. The joint of flange plates of every two transversely-connected small box girders is provided with a groove with an upward opening. Due to the fact that each groove is formed in the joint of the two corresponding small box girders and steel plates or concrete plates or composite material plates serving as bottom molds of cast-in-place wet joints are placed in the grooves, leakage and falling objects can be effectively prevented, potential safety hazards to the position below the bridge are reduced and even eradicated, and safety of construction above an electrified railway, a road or a building is guaranteed; wet joint construction is performed in the grooves, the wet joints will be connected with a prefabricated plate after being formed in a poured manner, the bending rigidity of the wet joints is greatly improved, and meanwhile, the transverse integrity of the bridge is enhanced to a certain extent; and continuity is high in the on-site transverse connecting construction work process of the small box girders, construction quality is improved, and the blocking and controlling time of trains and roads is greatly shortened.
Description
Technical field
The invention belongs to bridge construction engineering field, particularly relate to a kind of small box girder bridge and construction method thereof.
Background technology
Case beam is the girder construction of a kind of similar boxed-section shape in bridge engineering, small box girder due to its bridge construction globality better, also relatively strong on the convenience of erection, bridge most form adopting split type combination small box girder when crossing over existing railway, highway of current medium and small span.
Electric railway line, the operation of small box girder bridge construction is done when such as building the constructions such as wet seam above road or structure, concrete slurry may be had, aggregate is under even template associated components etc. falls to bridge, if encounter contact net or vehicle, lead to great driving accident, security risk is huge, therefore the operation of small box girder bridge construction all needs to do safeguard procedures, protection method of the prior art is generally sets up protecting canopy frame, set up defences in frame upper berth again above electric railway high-voltage breakdown insulating slab (all-insulated plate) isolation, all material all wants Fire Hazard Area, pay special attention to continuous print current when construction can not flow on railroad high voltage wire.This kind of protection method is unobstructed above electric railway, road, and under there is the condition setting up frame basis both sides, adopts physically-isolated mode to solve the problem falling thing above electrochemical line.But this kind of protection method also has certain limitation, particularly above electric railway, such as when wet seam is built on top, cannot complete 100% problem of accomplishing isolated top dropping; There is works wired top again or both, and the clear distance of railway electrification line and works cannot meet the requirement of setting up frame, and the method for frame physical isolation now just cannot be leaned on to have dealt with problems.
In addition, small box girder bridge construction scheme must through railway, the relevant departments such as road carry out review, evaluation is by rear, must to railway, road agency application is blocked, control time point is implemented, and to railway, it is limited with each duration of power off time that point is blocked in the application of road relevant departments, only have every day can carry out line operates very short a period of time, be pressed for time, cause limited efficacy, time prior art medium and small box girder construction bridge floor lateral connection (wet seam), the time of meeting at substantial carries out reinforcing bar binding, welding, vertical film, build, the work such as maintenance, required on-line operation overlong time, cause the duration than non-railway, road elongates nearly ten times even tens times across place, overall work progress is caused to follow up.
Summary of the invention
The object of the embodiment of the present invention is to provide a kind of small box girder bridge and construction method thereof, to solve the problem of prior art length consuming time.
The embodiment of the present invention is achieved in that a kind of small box girder bridge, and described bridge comprises the small box girder that at least two transverse directions are connected, and the junction of the frange plate 1 of the small box girder of any two lateral connection is provided with opening direction groove upwards.
A construction method for small box girder bridge, comprising: step 1, makes and settles small box girder;
The upper edge of the frange plate at the described small box girder made and the lateral connection place of small box girder described in another, is provided with the re-entrant angle caving inward and formed; During arrangement, two described re-entrant angles of the junction of the described small box girder that two transverse directions are connected are combined to form opening direction groove upwards;
Step 2, the bottom surface of described groove is placed the precast plate that size and described groove size match;
Step 3, fills airtight filler in the gap of the seam crossing of described precast plate and described frange plate;
Step 4, carries out cast-in-place wet seam on precast plate described in described inside grooves;
Step 5, lays C50 waterproof concrete layer and carries out connection and build on the junction of two described small box girder of lateral connection.
The beneficial effect of a kind of small box girder bridge provided by the invention and construction method thereof comprises:
A kind of small box girder bridge that the embodiment of the present invention provides and construction method thereof, by arranging groove two small box girder junctions, the steel plate of the bed die being used as cast-in-place wet seam is placed in groove, effectively can prevent the generation of water clock and pendant thing, reduce and even stopped construction period to the potential safety hazard under bridge, ensure that the safety of constructing above electrified railway, road or structure.
Wet seam is carried out in groove, directly be bed die with precast plate and precast plate one side upward plucking before placement because upper lateral connects, can be connected with precast plate after wet seam builds shaping, improve the bending rigidity of wet seam crossing significantly, also enhance the globality of bridge lateral simultaneously to a certain extent.
In small box girder bridge construction process, on-the-spot small box girder lateral connection construction working process continuity is high, improve construction quality, highly shortened bridge down train influence time, the time that essence need interrupt railway operation or highway road traffic at least can reduce half, drastically increase the service efficiency of railway and road, also greatly reduce conveyance loss expense simultaneously.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the embodiment of the enclosed construction of the small box girder of two lateral connection in a kind of small box girder bridge provided by the invention;
Fig. 2 is part A partial enlarged drawing in Fig. 1;
In figure, 1 is frange plate, and 2 is precast plate, and 3 is layer of concrete, and 4 is C50 waterproof concrete layer, and 5 is filler.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
In order to technical solutions according to the invention are described, be described below by specific embodiment.
Embodiment one
Embodiment one provided by the invention is the embodiment of a kind of small box girder bridge provided by the invention, in the embodiment of a kind of small box girder bridge provided by the invention:
Be illustrated in figure 1 the structural representation of the embodiment of the enclosed construction of the small box girder of two lateral connection in a kind of small box girder bridge provided by the invention, be illustrated in figure 2 part A partial enlarged drawing in Fig. 1 provided by the invention, from Fig. 1 and Fig. 2, in this enclosed construction:
The width of groove and the degree of depth can adjust according to the practical structures of small box girder and operation environment, and the scope of width can be 300-1000mm, and the scope of the degree of depth can be 15-25mm.The cross section of groove can be trapezoidal, U-shaped or rectangle.In the embodiment that Fig. 1 and Fig. 2 provides, the width of groove is 400mm, and the degree of depth is 20mm, and cross section is rectangle.
Further, the bottom surface of this groove being placed with the precast plate 2 that size and groove size match, as the bed die of cast-in-place wet seam, inside grooves precast plate 2 is layer of concrete 3.
Precast plate 2 can be steel plate, concrete slab or composite board, and the body that this composite board edge can be fixed on beam body bracket has comparatively large rigidity, and fixing Hou Ban center is indeformable.The thickness of precast plate 2 and layer of concrete 3 sets flexibly according to site environment, and when precast plate 2 is steel plate, thickness range can be 0.5-3cm; During for concrete slab, thickness range can be 4-10cm; During for composite board, thickness range can be respectively 2cm and 18cm in the embodiment that provides of 2-18cm, Fig. 1 and Fig. 2.
Preferably, before building wet seam this steel plate and frange plate 1 seam crossing gap in be filled with airtight filler 5.This filler 5 can be half flexible long-acting filler, such as epoxy resin or elastic body (TST) etc.Can prevent concrete slurries from dropping to bridge from gap, and have certain link effect.
Further, after carrying out wet seam in groove, the layer of concrete 3 that wet seam is formed and two small box girder be equipped with C50 waterproof concrete layer 4 above, the thickness of this C50 waterproof concrete layer 4 sets according to on-site actual situations, scope can be 10cm in the embodiment that provides of 8-20cm, Fig. 1 and Fig. 2.
A kind of bridge that the present embodiment provides, any two transverse directions be connected the junction of small box girder be provided with groove, the precast plate of the bed die being used as cast-in-place wet seam is placed in groove, effectively can prevent the generation of water clock and pendant thing, reduce and even stopped construction period to the potential safety hazard under bridge, ensure that the safety of constructing above electrified railway, road or structure.
Wet seam is carried out in groove, directly be bed die with precast plate and precast plate one side upward plucking before placement because upper lateral connects, can be connected with precast plate after wet seam builds shaping, improve the bending rigidity of wet seam crossing significantly, also enhance the globality of bridge lateral simultaneously to a certain extent.
Embodiment two
Embodiment two provided by the invention is the embodiment of the construction method of a kind of small box girder bridge provided by the invention, and the embodiment of the construction method of a kind of small box girder bridge provided by the invention comprises the steps:
Step 1, makes and settles small box girder;
The upper edge of the frange plate at the small box girder made and the lateral connection place of another small box girder, is provided with the re-entrant angle caving inward and formed; During arrangement, two re-entrant angles of the junction of the small box girder that two transverse directions are connected are combined to form opening direction groove upwards;
Step 2, the bottom surface of groove is placed the precast plate that size and groove size match;
Step 3, fills airtight filler in the gap of the seam crossing of precast plate and frange plate;
Step 4, carries out cast-in-place wet seam on inside grooves precast plate;
Step 5, lays C50 waterproof concrete layer and carries out connection and build on the junction of two small box girder of lateral connection.
Further, the small box girder made in step 1, width and the degree of depth of the groove of two small box girder lateral connection formation can adjust according to the practical structures of small box girder and operation environment, and the scope of width can be 300-1000mm, and the scope of the degree of depth can be 15-25mm.The cross section of groove can be trapezoidal, U-shaped or rectangle.
In step 2, precast plate can be steel plate, concrete slab or composite board, and the body that this composite board edge can be fixed on beam body bracket has comparatively large rigidity, and fixing Hou Ban center is indeformable.The thickness of precast plate sets flexibly according to site environment, is 2cm in the embodiment that Fig. 1 and Fig. 2 provides.
In step 3, the filler of filling in the gap of the seam crossing of precast plate and frange plate can be half flexible long-acting filler, such as epoxy resin or elastic body (TST) etc.Can prevent concrete slurries from dropping to bridge from gap, and have certain link effect.
The thickness carrying out the layer of concrete that cast-in-place wet seam is formed in step 4 sets flexibly according to site environment, is 18cm in the embodiment that Fig. 1 and Fig. 2 provides.
The thickness of C50 waterproof concrete layer 4 laid in step 5 sets according to on-site actual situations, and scope can be in the embodiment that provides of 8-20cm, Fig. 1 and Fig. 2 be 10cm.
The construction method of a kind of small box girder bridge provided by the invention, on-the-spot small box girder lateral connection construction working process continuity is high, improve construction quality, highly shortened bridge down train influence time, the time that essence need interrupt railway operation or highway road traffic at least can reduce half, drastically increase the service efficiency of railway and road, also greatly reduce conveyance loss expense simultaneously.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a small box girder bridge, is characterized in that, described bridge comprises the small box girder that at least two transverse directions are connected, and the junction of the frange plate (1) of the small box girder of any two lateral connection is provided with opening direction groove upwards.
2. small box girder bridge as claimed in claim 1, is characterized in that, the cross section of described groove is trapezoidal, U-shaped or rectangle;
The scope of the width of described groove is 300-500mm, and the scope of the degree of depth is 15-25mm.
3. small box girder bridge as claimed in claim 1, is characterized in that, the bottom surface of described groove is placed with the precast plate (2) that size and described groove size match.
4. small box girder bridge as claimed in claim 3, is characterized in that, described precast plate (2) is steel plate, concrete slab or composite material; During for steel plate, thickness range is 0.5-3cm; During for concrete slab, thickness range is 4-10cm; During for composite board, thickness range is 2-18cm.
5. bridge as claimed in claim 3, is characterized in that, is filled with airtight filler (5) in described precast plate (2) and the gap of the seam crossing of described frange plate (1).
6. small box girder bridge as claimed in claim 5, it is characterized in that, described filler (5) is half flexible long-acting filler, comprises epoxy resin and elastic body.
7. small box girder bridge as claimed in claim 1, is characterized in that, the upper layer of concrete (3) for wet seam formation of precast plate (2) described in described concave part.
8. small box girder bridge as claimed in claim 7, is characterized in that, is equipped with C50 waterproof concrete layer (4) above the described layer of concrete (3) that wet seam is formed and two described small box girder;
The scope of the thickness of described C50 waterproof concrete layer (4) is 8-20cm.
9. a construction method for small box girder bridge, is characterized in that, described method comprises:
Step 1, makes and settles small box girder;
The upper edge of the frange plate at the described small box girder made and the lateral connection place of small box girder described in another, is provided with the re-entrant angle caving inward and formed; During arrangement, two described re-entrant angles of the junction of the described small box girder that two transverse directions are connected are combined to form opening direction groove upwards;
Step 2, the bottom surface of described groove is placed the precast plate that size and described groove size match;
Step 3, fills airtight filler in the gap of the seam crossing of described precast plate and described frange plate;
Step 4, carries out cast-in-place wet seam on precast plate described in described inside grooves;
Step 5, lays C50 waterproof concrete layer and carries out connection and build on the junction of two described small box girder of carrying out the lateral connection that described cast-in-place wet joint treatment is crossed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510464675.6A CN105155399A (en) | 2015-07-31 | 2015-07-31 | Small box girder bridge and building method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510464675.6A CN105155399A (en) | 2015-07-31 | 2015-07-31 | Small box girder bridge and building method thereof |
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| CN105155399A true CN105155399A (en) | 2015-12-16 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105672135A (en) * | 2016-01-26 | 2016-06-15 | 浙江兴土桥梁临时钢结构工程有限公司 | Simulation pre-pressing method for concrete box girder construction supporting frame |
| CN105926426A (en) * | 2016-05-06 | 2016-09-07 | 烟台图文马克化工科技有限公司 | Building method of small box beam bridge |
| CN106835931A (en) * | 2017-02-20 | 2017-06-13 | 孙英 | A kind of small box girder bridge |
| CN107354857A (en) * | 2017-08-30 | 2017-11-17 | 中铁工程设计咨询集团有限公司 | A kind of high-speed railway repairing combined box beam and its assemble method |
| CN108396637A (en) * | 2018-04-28 | 2018-08-14 | 福州大学 | Based on short-line prefabrication assembly girder construction and its construction method |
| CN109403199A (en) * | 2018-11-22 | 2019-03-01 | 上海市政交通设计研究院有限公司 | A kind of small box girder bridge floor connection structure and construction method |
| CN110607738A (en) * | 2019-09-05 | 2019-12-24 | 中交武汉港湾工程设计研究院有限公司 | Small box girder structure suitable for medium-small span simply supported girder bridge and construction method thereof |
| CN115928558A (en) * | 2023-02-21 | 2023-04-07 | 湖南大学 | Transverse joint structure of UHPC combined box girder and construction method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105672135A (en) * | 2016-01-26 | 2016-06-15 | 浙江兴土桥梁临时钢结构工程有限公司 | Simulation pre-pressing method for concrete box girder construction supporting frame |
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| CN108396637A (en) * | 2018-04-28 | 2018-08-14 | 福州大学 | Based on short-line prefabrication assembly girder construction and its construction method |
| CN109403199A (en) * | 2018-11-22 | 2019-03-01 | 上海市政交通设计研究院有限公司 | A kind of small box girder bridge floor connection structure and construction method |
| CN110607738A (en) * | 2019-09-05 | 2019-12-24 | 中交武汉港湾工程设计研究院有限公司 | Small box girder structure suitable for medium-small span simply supported girder bridge and construction method thereof |
| CN115928558A (en) * | 2023-02-21 | 2023-04-07 | 湖南大学 | Transverse joint structure of UHPC combined box girder and construction method thereof |
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