CN211947881U - Upper bearing type longitudinal block prefabricated box girder - Google Patents
Upper bearing type longitudinal block prefabricated box girder Download PDFInfo
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- CN211947881U CN211947881U CN202020364199.7U CN202020364199U CN211947881U CN 211947881 U CN211947881 U CN 211947881U CN 202020364199 U CN202020364199 U CN 202020364199U CN 211947881 U CN211947881 U CN 211947881U
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- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000009423 ventilation Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 11
- 238000009434 installation Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 9
- 230000007774 longterm Effects 0.000 abstract 1
- 239000003643 water by type Substances 0.000 abstract 1
- 239000011324 bead Substances 0.000 description 4
- 239000011150 reinforced concrete Substances 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 238000009415 formwork Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004567 concrete Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000004540 pour-on Substances 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
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Abstract
The utility model discloses a prefabricated case roof beam of vertical piecemeal of formula of taking on, Z shape longeron A and Z shape longeron B are for setting up in opposite directions, and the bottom of Z shape longeron A, Z shape longeron B is passed through the wet seam connection of bottom plate, and Z shape longeron A and Z shape longeron B's both ends head passes through the end crossbeam and connects, and the superimposed sheet is assembled each other on the step on Z shape longeron A and Z shape longeron B upper portion, waters the layer behind the roof and pours on the upper portion cavity that Z shape longeron A, Z shape longeron B and superimposed sheet formed. The utility model has the advantages that: the box girder is longitudinally divided into a plurality of longitudinal beams with lighter self-weight and larger span and a plurality of laminated plates, and conventional engineering mechanical equipment can be adopted for transportation and installation, so that the problem that the prefabricated assembly process cannot be pushed because the viaduct is usually discontinuously arranged and is difficult to adopt large-scale special bridge equipment for continuous operation in municipal engineering is solved, and the influence of the on-site long-term construction operation of the full-hall support in the traditional cast-in-place process on municipal road and urban environment is avoided.
Description
Technical Field
The utility model relates to a box girder erects technical field, especially vertically the prefabricated box girder of piecemeal of formula of holding on.
Background
The box girder is divided into a prefabricated box girder and a cast-in-place box girder. The prefabricated box girder can be prefabricated by whole holes or prefabricated by transverse sections, after the lower engineering is completed, large-scale transportation equipment and a bridge erecting frame are used for on-site erection or splicing, the construction progress is fast, the on-site operation time is short, but the turnover utilization rate of bridge erecting machine equipment is considered, and the overhead bridge girder is required to be continuously more than 10 kilometers. The cast-in-place box girder can be completed by adopting a mode of moving a slip form or erecting a full-space support on site, all operations are completed on site, the field operation time is long, and particularly the full-space support system has great influence on municipal roads and urban environment. The steel reinforced concrete box girder consists of prestressed reinforced concrete box girders, steel box girders and steel-concrete combination girders. The prestressed reinforced concrete box girder is constructed on site, and transverse prestress is also arranged in some cases besides longitudinal prestress; the steel box girder is generally processed in a factory and then transported to a site for installation, and has an all-steel structure and a partially reinforced concrete pavement layer.
The existing prefabricated box girder needs a large-scale bridge girder erection machine to erect during construction, the turnover utilization rate of bridge girder erection machine equipment is considered, the overhead bridge girder is required to be continuously more than 10 kilometers generally, the prefabricated box girder is inconvenient to transport in areas with complex terrain and inconvenient traffic, a prefabricated girder field is difficult to construct, the traditional prefabricated box girder process is difficult to adopt in the overhead region with shorter length, the cast-in-place process is intelligently adopted, the field operation time of each cross box girder needs about 2 months, the influence on municipal roads is large, and the construction period is long.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's shortcoming, provide a prefabricated case roof beam of vertical piecemeal of formula of holding on the head that site operation cycle is short, the case roof beam erects the convenience, requires lowerly to the overhead region continuous length.
The purpose of the utility model is realized through the following technical scheme: the prefabricated box girder of formula longitudinal partitioning of taking over, including Z shape longeron A, Z shape longeron B, superimposed sheet, the wet seam of bottom plate, the end crossbeam, the roof post-cast layer, Z shape longeron A and Z shape longeron B set up for in opposite directions, the bottom of Z shape longeron A, Z shape longeron B is connected through the wet seam of bottom plate, the both ends head of Z shape longeron A and Z shape longeron B is connected through the end crossbeam, the superimposed sheet is assembled on the step on Z shape longeron A and Z shape longeron B upper portion each other, the roof post-cast layer is pour on the upper portion cavity that Z shape longeron A, Z shape longeron B and superimposed sheet formed.
Preferably, an inverted T-shaped longitudinal beam is further arranged between the Z-shaped longitudinal beam A and the Z-shaped longitudinal beam B, a gap between the bottom of the inverted T-shaped longitudinal beam and the bottom of the Z-shaped longitudinal beam A is connected through a bottom plate wet joint, a gap between the bottom of the inverted T-shaped longitudinal beam and the bottom of the Z-shaped longitudinal beam B is connected through a bottom plate wet joint, and the top of the inverted T-shaped longitudinal beam is pressed against the bottom of the laminated slab.
Preferably, each of the Z-shaped longitudinal beams a and B has a base plate, a web plate and a flange, and the base plate beam end of the Z-shaped longitudinal beam a and the base plate beam end of the Z-shaped longitudinal beam B are supported on the support.
Preferably, the top of the outer side of the flange of each of the Z-shaped longitudinal beam A and the Z-shaped longitudinal beam B is provided with a rib, and the upper surface of the top plate post-cast layer is not higher than the upper surface of the rib.
Preferably, the laminated slab is a flat plate or an arched plate, and the top surface of the laminated slab is provided with connecting steel bars.
Preferably, the bottom plate is provided with a plurality of through holes.
Preferably, the web plate is provided with a plurality of vent holes.
Preferably, two ends of the bottom plate are provided with prestressed anchor toothed plates.
The utility model has the advantages of it is following: the utility model discloses a prefabricated case roof beam of vertical piecemeal of deck formula vertically falls into the Z shape longeron of two symmetries with traditional case roof beam, can add down T shape longeron when necessary to and top superimposed sheet, the component monomer dead weight after the split is light, can adopt conventional engineering equipment to prefabricate, transport and hoist and mount, during the installation, the longeron can directly be taken up and establish on substructure's support, forms the operation platform of cast-in-place construction in later stage, avoids setting up formwork support. The Z-shaped longitudinal beam, the inverted T-shaped longitudinal beam and the laminated slab are prefabricated by adopting factory line production, when the Z-shaped longitudinal beam, the inverted T-shaped longitudinal beam and the laminated slab are installed, the engineering machinery is adopted to hoist the prefabricated components in place quickly, and the wet joints are used for connecting the prefabricated components into the whole span box girder. After the prefabricated parts and the lower structures are finished, the longitudinal beams can be installed to form the operation platform only through conventional equipment, then the longitudinal beams are used as the operation platform to pour end cross beams, wet joints of bottom plates and install laminated slabs, and top plate post-pouring layers are poured on the laminated slabs, so that erection of box girders is achieved. The process has low requirements on transportation and installation equipment and low site conditions and line conditions, so the process can be flexibly applied to urban elevated district structures.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the installation of the laminated slab;
fig. 3 is an installation schematic diagram of a toothed plate and a through hole on a bottom plate;
FIG. 4 is a schematic cross-sectional view of an end of a box girder;
FIG. 5 is an end view of the middle of the box girder;
FIG. 6 is a schematic view of the installation of an inverted T stringer;
in the figure, 1-Z-shaped longitudinal beam A, 2-Z-shaped longitudinal beam B, 3-bottom plate wet joint, 4-end cross beam, 5-laminated slab, 6-top plate post-cast layer, 7-inverted T-shaped longitudinal beam, 11-bottom plate, 12-web plate, 13-flange, 14-convex rib, 15-vent hole, 16-through hole, 17-toothed plate and 18-step.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the present invention, the embodiments and the features of the embodiments may be combined with each other without conflict.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which the products of the present invention are conventionally placed in use, or the position or positional relationship which the skilled person conventionally understand, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the reference is made must have a specific position, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 to 5, the top-loading type longitudinal block prefabricated box girder comprises a Z-shaped longitudinal beam a1, a Z-shaped longitudinal beam B2, a laminated slab 5, a bottom plate wet joint 3, an end cross beam 4, a top plate post-cast layer 6, a Z-shaped longitudinal beam a1 and a Z-shaped longitudinal beam B2 which are arranged oppositely, a Z-shaped longitudinal beam a1, a web 12, a Z-shaped longitudinal beam B2 and the laminated slab 5 which are all prefabricated and processed in a factory, and then transported to a site for installation, of course, a construction shed can be built at a construction site, the prefabrication of the Z-shaped longitudinal beam a1, the Z-shaped longitudinal beam B2 and the laminated slab 5 is completed in the construction shed, in this embodiment, as shown in fig. 3, the Z-shaped longitudinal beam a1 and the Z-shaped longitudinal beam B2 are both provided with a bottom plate 11, a web 12 and a flange 13, the bottom plates 11 of the Z-shaped longitudinal beam a1 and the Z-shaped longitudinal beam B2 are both supported on a support, the bottoms of the Z-shaped longitudinal beam a1 and the Z, further, the two webs 12 are outwardly inclined.
In the embodiment, as shown in fig. 2 and 4, two ends of a Z-shaped longitudinal beam a1 and a Z-shaped longitudinal beam B2 are connected through an end cross beam 4, the end cross beam 4 and a bottom plate wet joint 3 connect the Z-shaped longitudinal beam a1 and the Z-shaped longitudinal beam B2 together, so that the connection strength of the Z-shaped longitudinal beam a1 and the Z-shaped longitudinal beam B2 is ensured, furthermore, a post-cast strip is poured between the Z-shaped longitudinal beam a1 and the Z-shaped longitudinal beam B2, the post-cast strip is connected with the inner side of the end cross beam 4, and when pouring, the end cross beam 4 can be poured firstly, and the end cross beam 4 and the post-cast strip can also be poured together.
In this embodiment, as shown in fig. 3, the composite slab 5 is assembled to each other on the step 18 at the upper part of the Z-shaped longitudinal beam a1 and the Z-shaped longitudinal beam B2, and the top plate post-cast layer 6 is poured on the upper cavity formed by the Z-shaped longitudinal beam A, Z and the composite slab 5. Further, step 18 sets up the junction at web 12 and 13 upper surfaces on the edge of a wing, superimposed sheet 5's both ends are located step 18, superimposed sheet 5 is dull and stereotyped or arch shaped plate, it is preferred, superimposed sheet 5 is the arch shaped plate, its structural strength is high, its bearing capacity is compared in dull and stereotyped bearing capacity and is strong, the top in the 13 outside on edge of a wing is provided with bead 14, the upper surface of watering layer 6 behind the roof is not higher than bead 14's upper surface, it is preferred, the upper surface of watering layer 6 behind the roof flushes with the upper surface of bead 14, make the difficult overflow of mortar through bead 14, it pours the convenience to water layer 6 behind the roof, it is further, be equipped with the splice bar at 5 top surfaces of superimposed sheet, thereby strengthen the joint strength between roof post-watering layer 6 and the superimposed sheet 5.
In this embodiment, as shown in fig. 3, a plurality of through holes 16 are formed in the bottom plate 11, the through holes 16 are used for hoisting a bottom plate wet joint formwork in a construction period, the through holes 16 serve as drain holes in an operation period to drain away accumulated water in the box girder, further, a plurality of vent holes 15 are formed in the web 12, and the vent holes 15 can ventilate, so that the vent holes 15 can ventilate when cross wind occurs, air pressures on the inner side and the outer side of the box girder are balanced, the use reliability of the box girder is ensured, and the hole positions can be properly adjusted if contradiction exists between the ventilation holes and the prestressed beams.
In the present embodiment, as shown in fig. 3, the prestressed anchor toothed plates 17 are provided at both ends of the bottom plate 11 to receive concentrated loads when the bridge system is tensioned.
In this embodiment, as shown in fig. 6, when the width of the beam is large, a plurality of inverted T-shaped longitudinal beams need to be added between the Z-shaped longitudinal beam a1 and the Z-shaped longitudinal beam B2, that is, a plurality of inverted T-shaped longitudinal beams need to be arranged between the Z-shaped longitudinal beam a1 and the Z-shaped longitudinal beam B2, gaps between bottoms of the inverted T-shaped longitudinal beams and bottoms of the Z-shaped longitudinal beam a1 are connected through the bottom plate wet joint 3, gaps between bottoms of the inverted T-shaped longitudinal beams and bottoms of the Z-shaped longitudinal beam B2 are connected through the bottom plate wet joint 3, tops of the inverted T-shaped longitudinal beams abut against the bottom of the composite slab 5, and the longitudinally split prefabricated box girder can be applied to a box girder with a large beam width through the inverted T-shaped longitudinal.
In conclusion, the deck-type longitudinally-partitioned prefabricated box girder longitudinally divides the traditional box girder into two symmetrical Z-shaped longitudinal beams and a top laminated slab 5, an inverted T-shaped longitudinal beam can be additionally arranged if necessary, the separated component monomer has light dead weight, and can be prefabricated, transported and hoisted by adopting conventional engineering equipment, and during installation, the longitudinal beam can be directly erected on a support of a substructure to form an operation platform for later-stage cast-in-place construction, so that a formwork support is prevented from being erected. The Z-shaped longitudinal beam, the inverted T-shaped longitudinal beam and the laminated slab 5 are prefabricated by adopting factory line production, when the prefabricated Z-shaped longitudinal beam, the inverted T-shaped longitudinal beam and the laminated slab are installed, the engineering machinery is adopted to be quickly hoisted in place, all prefabricated components are connected into the whole span box girder by using wet joints, the process of prefabricating the humidifying joints is used for completing most operations in a factory, and a small part of operations are completed on site, so that the construction efficiency is improved, the labor environment of workers is improved, and the influence on municipal road traffic interference, urban environment dust and noise pollution is further reduced. After the prefabricated parts and the lower structures are finished, the longitudinal beams can be installed to form the operation platform only through conventional equipment, then the longitudinal beams are used as the operation platform to pour the end cross beams 4, the bottom plate wet joints 3 and the laminated slabs 5, and the top plate post-pouring layers 6 are poured on the laminated slabs 5, so that erection of the box girders is achieved. The process has low requirements on transportation and installation equipment and low site conditions and line conditions, so the process can be flexibly applied to urban elevated district structures.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (8)
1. Prefabricated case roof beam of vertical piecemeal of formula of holding on, its characterized in that: pour the layer after A, Z shape longeron B, superimposed sheet, the wet seam of bottom plate, end crossbeam, roof of Z shape longeron A with Z shape longeron B sets up for in opposite directions, Z shape longeron A the bottom of Z shape longeron B passes through the wet seam of bottom plate is connected, Z shape longeron A with Z shape longeron B's both ends head passes through the end crossbeam is connected, the superimposed sheet is assembled each other on the step on Z shape longeron A and Z shape longeron B upper portion, pour the layer behind the roof and pour Z shape longeron A Z shape longeron B with on the upper portion cavity that the superimposed sheet formed.
2. The deck-type longitudinally segmented precast box girder according to claim 1, wherein: still be provided with the longeron of falling T between Z shape longeron A and the Z shape longeron B, the bottom of the longeron of falling T with clearance between the Z shape longeron A bottom is through the wet seam connection of bottom plate, the bottom of the longeron of falling T with clearance between the bottom of Z shape longeron B is through the wet seam connection of bottom plate, the top of the longeron of falling T is in the bottom of superimposed sheet.
3. The deck-type longitudinal block precast box girder according to claim 1 or 2, wherein: the Z-shaped longitudinal beam A and the Z-shaped longitudinal beam B are respectively provided with a bottom plate, a web plate and a flange, and the end part of the bottom plate beam of the Z-shaped longitudinal beam A and the end part of the bottom plate beam of the Z-shaped longitudinal beam B are both supported on the support.
4. The deck-type longitudinally segmented precast box girder according to claim 2, wherein: the top of the outer side of the flange of each of the Z-shaped longitudinal beam A and the Z-shaped longitudinal beam B is provided with a convex edge, and the upper surface of the top plate post-pouring layer is not higher than the upper surface of the convex edge.
5. The deck-type longitudinally segmented precast box girder according to claim 3, wherein: the laminated slab is a flat plate or an arched plate, and the top surface of the laminated slab is provided with connecting steel bars.
6. The deck-type longitudinally segmented precast box girder according to claim 4, wherein: the bottom plate is provided with a plurality of through holes.
7. The deck-type longitudinally segmented precast box girder according to claim 5, wherein: a plurality of ventilation holes are formed in the web plate.
8. The deck-type longitudinally segmented precast box girder according to claim 6, wherein: and two ends of the bottom plate are provided with prestressed anchor toothed plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020364199.7U CN211947881U (en) | 2020-03-20 | 2020-03-20 | Upper bearing type longitudinal block prefabricated box girder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020364199.7U CN211947881U (en) | 2020-03-20 | 2020-03-20 | Upper bearing type longitudinal block prefabricated box girder |
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| CN211947881U true CN211947881U (en) | 2020-11-17 |
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| CN202020364199.7U Active CN211947881U (en) | 2020-03-20 | 2020-03-20 | Upper bearing type longitudinal block prefabricated box girder |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111172855A (en) * | 2020-03-20 | 2020-05-19 | 重庆市轨道交通设计研究院有限责任公司 | Upper bearing type longitudinal block prefabricated box girder |
| CN111172855B (en) * | 2020-03-20 | 2024-11-15 | 重庆市轨道交通设计研究院有限责任公司 | Upper bearing type longitudinal block prefabricated box girder |
-
2020
- 2020-03-20 CN CN202020364199.7U patent/CN211947881U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111172855A (en) * | 2020-03-20 | 2020-05-19 | 重庆市轨道交通设计研究院有限责任公司 | Upper bearing type longitudinal block prefabricated box girder |
| CN111172855B (en) * | 2020-03-20 | 2024-11-15 | 重庆市轨道交通设计研究院有限责任公司 | Upper bearing type longitudinal block prefabricated box girder |
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Address after: Building 1, No. 19 Wealth Avenue, North New District, Chongqing, 400000 (No. 3, 4, 5, and 6, 8th floor, Building A, No. 3 Wealth Park, Chongqing High tech) Patentee after: CHONGQING RAIL TRANSIT DESIGN AND RESEARCH INSTITUTE Co.,Ltd. Country or region after: China Patentee after: Chongqing Monorail Transit Engineering Group Co.,Ltd. Address before: Building 1, No. 19 Wealth Avenue, North New District, Chongqing, 400000 (No. 3, 4, 5, and 6, 8th floor, Building A, No. 3 Wealth Park, Chongqing High tech) Patentee before: CHONGQING RAIL TRANSIT DESIGN AND RESEARCH INSTITUTE Co.,Ltd. Country or region before: China Patentee before: CHONGQING MONORAIL TRAFFIC ENGINEERING CO.,LTD. |
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