CN215800928U - Equal internal section reinforced concrete box girder structure - Google Patents
Equal internal section reinforced concrete box girder structure Download PDFInfo
- Publication number
- CN215800928U CN215800928U CN202120254763.4U CN202120254763U CN215800928U CN 215800928 U CN215800928 U CN 215800928U CN 202120254763 U CN202120254763 U CN 202120254763U CN 215800928 U CN215800928 U CN 215800928U
- Authority
- CN
- China
- Prior art keywords
- box girder
- reinforced concrete
- girder
- continuous
- concrete box
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000011150 reinforced concrete Substances 0.000 title claims abstract description 26
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 10
- 230000002146 bilateral effect Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000009417 prefabrication Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract description 2
- 239000011241 protective layer Substances 0.000 abstract description 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 12
- 230000002787 reinforcement Effects 0.000 description 12
- 239000004567 concrete Substances 0.000 description 11
- 229910000831 Steel Inorganic materials 0.000 description 10
- 239000010959 steel Substances 0.000 description 10
- 238000010276 construction Methods 0.000 description 9
- 239000003973 paint Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 230000001680 brushing effect Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 238000010422 painting Methods 0.000 description 4
- 230000000149 penetrating effect Effects 0.000 description 4
- 238000005498 polishing Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 239000010410 layer Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Images
Landscapes
- Bridges Or Land Bridges (AREA)
Abstract
The equal inner section reinforced concrete box girder structure has the structure that the cavity in the box girder is completely the same equal section from the head end to the other end, and the web plate is gradually thickened outwards at the position close to the two ends. The utility model can change the structure that the middle cavity of the traditional reinforced concrete box girder is large and the outlets at two ends are narrow, is beneficial to the installation and the removal of the internal mold during the prefabrication and can effectively ensure the positioning of the reinforcing steel bar protective layer.
Description
Technical Field
The utility model relates to the technical field of bridge construction, in particular to a reinforced concrete box girder structure with equal inner sections.
Background
One kind of bridge engineering center sill, the inside is hollow, and there is the flange on upper portion both sides, similar case, therefore gets the name. The vertical ribs on two sides of the box girder are called web plates, the upper edge of the box-shaped section is called a top plate, the part, which is picked out of the box girder, on two sides of the top plate is called a wing plate, and the lower edge, opposite to the top plate, of the box girder section is called a bottom plate.
When the box girder is used as a bridge main body, most of the box girder is made of reinforced concrete, the stress analysis can be simplified into a simple supporting girder, a continuous girder or various stress forms, when the box girder dead weight generates a negative bending moment, a steel strand cable is often required to be arranged at the position where the negative bending moment stress of the box girder is maximum for drawing, and the damage of the load to the girder body is reduced. A hogging moment reserved tooth block is arranged at the joint of the steel strands and embedded in the top plate.
Because the box girder is longer, the positive and negative bending moments applied to each position of the box girder after construction and erection are different, and particularly, the two ends of the box girder are stress concentration positions, the design often reduces the cavities at the two ends of the box girder, and the web plate of the box girder is thickened inwards, so that the torsion resistance of the box girder is enhanced. However, the traditional box girder thickening design causes the box girder cavity to be changed into a shape with a large middle and narrow outlets at two ends. The construction method comprises the following steps: the template consists of a bottom die, a side die and an inner die, the components are manufactured in advance respectively, the support is built firstly, then the bottom die and the side die are built, then the inner die forming the cavity of the box girder is built, and concrete can be poured after the inner die is built. The conventional box girder structure has the following disadvantages: 1. because form the support that cavity department densely covered different in size in the case roof beam, centre form quantity is also and huge, big in the middle of according to traditional case roof beam, the structure of both ends export narrowness, support and centre form transport business turn over case roof beam from both ends export very difficult, need reserve the manhole in roof department when concreting even, make things convenient for the material transportation, but this is done and is influenced case roof beam overall structure's integrality again, produce the hidden danger to the structural safety of case roof beam, the later stage has increased work load again to the filling of manhole, it takes a lot of work and time. 2. When the internal mold is installed, due to the inner wall with the variable cross section inclined, the inclination of the internal mold needs to be accurately controlled when the internal mold is built, and the internal mold is very inconvenient.
Disclosure of Invention
The equal-internal-section reinforced concrete box girder structure and the prefabricating method can change the structure that the middle cavity of the traditional reinforced concrete box girder is large and the outlets at two ends are narrow, are beneficial to the installation and the removal of an internal mold during prefabrication and can effectively ensure the positioning of a reinforcing steel bar protective layer.
The technical scheme is realized by the following steps:
the equal inner section reinforced concrete box girder structure has the structure that the cavity in the box girder is completely the same equal section from the head end to the other end, and the web plate is gradually thickened outwards at the position close to the two ends. The thickened size is calculated by the stress of the box girder.
The box girder comprises three forms, namely a two-end continuous girder, a two-end simply supported girder and a one-end continuous simply supported girder. No matter any box girder form, the technical effect of the utility model can be realized only by keeping the section of the inner cavity of the box girder unchanged and changing the size of the outwards thickened web plate.
The box girder is provided with one or more groups of reserved holes for the hogging moment tooth blocks at the continuous end, and the hogging moment tooth blocks are arranged on the wing plates in a bilateral symmetry manner. Move traditional hogging moment tooth piece preformed hole to pterygoid lamina both sides by roof central line position, make the roof keep planar complete, reduce the phenomenon that the reinforcing bar is broken by the preformed hole, be favorable to the atress of case roof beam, secondly also do benefit to the balance of case roof beam, dispersed the point of application of force, can design the hogging moment tooth piece preformed hole size littleer.
And the box girder is provided with an expansion joint connecting reinforcing steel bar at the simply supported end.
The box girder is half length and is the simply supported roof beam, and half length is continuous roof beam, and box girder outer wing board department both sides equipartition hogging moment tooth piece preformed hole on the length of continuous roof beam.
And under the condition that the box girder is used as the boundary beam, the wing plate is reserved with anti-collision wall connecting reinforcing steel bars and water drainage holes.
The prefabricating method of the reinforced concrete box girder structure with the equal inner section comprises the following steps: a. Hoisting and installing side templates at two sides of a base die of the pedestal, and painting demolding paint on the inner side surface;
B. hoisting and placing the bottom plate and the web plate reinforcement cage which are bound and formed above the pedestal;
C. b, polishing the outer side of the inner mold template, brushing demolding paint, and integrally hoisting the inner mold template and putting the inner mold template into the middle of the base plate and the web plate steel reinforcement framework in the step B; a pull rod is arranged at a preset drainage hole of the box girder to fixedly connect the inner mold template with the pedestal; D. binding a steel bar framework of a box girder top plate and a wing plate, wherein a hogging moment tooth block reserved hole at two sides of the wing plate is reserved; e. Pouring concrete, and vibrating during pouring;
F. after the concrete solidification and maintenance are finished, the inner die is turned inwards and separated from the inner cavity of the box girder;
g, arranging a dragging table on the end face of the box girder, wherein the upper plane of the dragging table is flush with the lower bottom surface of the inner mold, fixing a winch on the dragging table, and connecting a wire rope of the winch with the end head of the inner mold to horizontally drag the whole inner mold out of the inner cavity of the box girder;
H. and (3) separating and dismantling the side templates at the two sides, lifting off, penetrating prestressed reinforcements, tensioning, grouting and sealing holes, and finishing the construction of the reinforced concrete box girder with the equal inner cross section.
The utility model has the prominent substantive characteristics and remarkable progress that:
1. the structure that the middle cavity of the traditional variable cross-section reinforced concrete box girder is large and the outlets at two ends are narrow is changed into the structure that the middle cavity of the box girder is of an equal cross section from the beginning to the end, and the web plate is gradually thickened outwards at the position close to the two ends; the strength of the integral structure of the box girder can be guaranteed, the inner die template can be conveniently pulled out from the outlets at two ends of the box girder from the head to the tail, and the construction efficiency of prefabrication of the box girder is greatly improved.
2. The box girder hogging moment tooth block preformed holes are formed in the two sides of the outer wing plate of the box girder, the inner mold templates are all of the same size and specification due to the fact that no hogging moment tooth block preformed holes exist, complex management work of inner mold numbering is not needed, building convenience and efficiency of the inner mold are improved, and construction difficulty is reduced.
3. The thickness of the inner cavity concrete layer is easy to control, and the positioning of the reinforcing steel bar protection layer can be effectively ensured.
4. The box girder hogging moment tooth block preformed holes are formed in the two sides of the outer wing plate of the box girder, so that the situation that the hogging moment tooth block preformed holes are formed in the center line of the top plate of the box girder in the traditional mode is changed, the preformed holes are prevented from interfering with a box girder cavity, the integrity of the cavity structure is kept, and the integral structure and stress are facilitated; in addition, no slope concrete appears at the groove of the reserved hole in the inner cavity of the box girder, and the arrangement and the separation of the inner mold are not influenced.
5. The structure of the utility model is suitable for box girder structures with various stress conditions such as simple supported beams, continuous beams and the like, and has wide application range.
Drawings
FIG. 1 is a schematic view of the overall appearance structure of a conventional box girder;
FIG. 2 is a side view of a conventional box girder;
FIG. 3 is a side view of a half-section structure of a conventional box girder;
FIG. 4 is a cross-sectional view taken along line A-A of FIG. 2;
FIG. 5 is a sectional view taken along line B-B of FIG. 2;
FIG. 6 is a cross-sectional view taken along line C-C of FIG. 2;
FIG. 7 is a schematic view of the entire appearance structure of embodiment 1 of the present invention;
FIG. 8 is a schematic structural diagram of the side view of the embodiment 1 of the present invention;
FIG. 9 is a side view, partly in section, schematically illustrating the structure of embodiment 1 of the present invention;
FIG. 10 is a cross-sectional view taken along line D-D of FIG. 8;
FIG. 11 is a cross-sectional view taken along line E-E of FIG. 8;
FIG. 12 is a sectional view taken along section F-F of FIG. 8;
FIG. 13 is a schematic view of the entire appearance structure of embodiment 2;
FIG. 14 is a schematic view of the entire appearance structure of embodiment 3;
the sequence number names in the figure are: 1. a top plate; 2. a wing plate; 3. a web; 4. a base plate; 5. and a hole is reserved in the hogging moment tooth block.
Detailed Description
Example 1
The equal inner section reinforced concrete box girder structure is in a two-end continuous beam box form, the cavity in the beam is completely the same equal section from the head end to the other end, and the web plate is gradually thickened outwards at the position close to the two ends.
The box girder comprises three forms, namely a two-end continuous girder, a two-end simply supported girder and a one-end continuous simply supported girder.
The box girder is provided with one or more groups of reserved holes for the hogging moment tooth blocks at the continuous end, and the hogging moment tooth blocks are arranged on the wing plates in a bilateral symmetry manner.
And the box girder is provided with an expansion joint connecting reinforcing steel bar at the simply supported end.
The box girder is half length and is the simply supported roof beam, and half length is continuous roof beam, and box girder outer wing board department both sides equipartition hogging moment tooth piece preformed hole on the length of continuous roof beam.
The prefabricating method of the reinforced concrete box girder structure with the equal inner section comprises the following steps: a. Hoisting and installing side templates at two sides of a base die of the pedestal, and painting demolding paint on the inner side surface;
B. hoisting and placing the bottom plate and the web plate reinforcement cage which are bound and formed above the pedestal;
C. b, polishing the outer side of the inner mold template, brushing demolding paint, and integrally hoisting the inner mold template and putting the inner mold template into the middle of the base plate and the web plate steel reinforcement framework in the step B; a pull rod is arranged at a preset drainage hole of the box girder to fixedly connect the inner mold template with the pedestal;
D. binding a steel bar framework of a box girder top plate and a wing plate, wherein a hogging moment tooth block reserved hole at two sides of the wing plate is reserved; e. Pouring concrete, and vibrating during pouring;
F. after the concrete solidification and maintenance are finished, the inner die is turned inwards and separated from the inner cavity of the box girder;
g, arranging a dragging table on the end face of the box girder, wherein the upper plane of the dragging table is flush with the lower bottom surface of the inner mold, fixing a winch on the dragging table, and connecting a wire rope of the winch with the end head of the inner mold to horizontally drag the whole inner mold out of the inner cavity of the box girder;
H. and (3) separating and dismantling the side templates at the two sides, lifting off, penetrating prestressed reinforcements, tensioning, grouting and sealing holes, and finishing the construction of the reinforced concrete box girder with the equal inner cross section.
Example 2
The equal inner section reinforced concrete box girder structure is in a form of simply supported beams at two ends, the cavities in the beam are completely the same equal sections from the head end to the other end, and the web plates are gradually thickened outwards at the positions close to the two ends.
And expansion joint connecting reinforcing steel bars are reserved at two ends of the box girder.
The prefabricating method of the reinforced concrete box girder structure with the equal inner section comprises the following steps: a. Hoisting and installing side templates at two sides of a base die of the pedestal, and painting demolding paint on the inner side surface;
B. hoisting and placing the bottom plate and the web plate reinforcement cage which are bound and formed above the pedestal;
C. b, polishing the outer side of the inner mold template, brushing demolding paint, and integrally hoisting the inner mold template and putting the inner mold template into the middle of the base plate and the web plate steel reinforcement framework in the step B; a pull rod is arranged at a preset drainage hole of the box girder to fixedly connect the inner mold template with the pedestal;
D. binding the steel bar frameworks of the top plate and the wing plate of the box girder; e. Pouring concrete, and vibrating during pouring;
F. after the concrete solidification and maintenance are finished, the inner die is turned inwards and separated from the inner cavity of the box girder;
g, arranging a dragging table on the end face of the box girder, wherein the upper plane of the dragging table is flush with the lower bottom surface of the inner mold, fixing a winch on the dragging table, and connecting a wire rope of the winch with the end head of the inner mold to horizontally drag the whole inner mold out of the inner cavity of the box girder;
H. and (3) separating and dismantling the side templates at the two sides, lifting off, penetrating prestressed reinforcements, tensioning, grouting and sealing holes, and finishing the construction of the reinforced concrete box girder with the equal inner cross section.
Example 3
The equal inner section reinforced concrete box girder structure is in a form of a simply supported girder with one continuous end, the cavity in the girder is completely the same equal section from the head end to the other end, and the web plate is gradually thickened outwards at the position close to the two ends.
The box girder is provided with one or more groups of reserved holes for the hogging moment tooth blocks at the continuous end, and the hogging moment tooth blocks are arranged on the wing plates in a bilateral symmetry manner.
And the box girder is provided with an expansion joint connecting reinforcing steel bar at the simply supported end.
And the two sides of the outer wing plate of the box girder are uniformly provided with hogging moment tooth block preformed holes on the length of the continuous girder.
The prefabricating method of the reinforced concrete box girder structure with the equal inner section comprises the following steps: a. Hoisting and installing side templates at two sides of a base die of the pedestal, and painting demolding paint on the inner side surface;
B. hoisting and placing the bottom plate and the web plate reinforcement cage which are bound and formed above the pedestal;
C. b, polishing the outer side of the inner mold template, brushing demolding paint, and integrally hoisting the inner mold template and putting the inner mold template into the middle of the base plate and the web plate steel reinforcement framework in the step B; a pull rod is arranged at a preset drainage hole of the box girder to fixedly connect the inner mold template with the pedestal;
D. binding a steel bar framework of a box girder top plate and a wing plate, wherein a hogging moment tooth block reserved hole at two sides of the wing plate is reserved; e. Pouring concrete, and vibrating during pouring;
F. after the concrete solidification and maintenance are finished, the inner die is turned inwards and separated from the inner cavity of the box girder;
g, arranging a dragging table on the end face of the box girder, wherein the upper plane of the dragging table is flush with the lower bottom surface of the inner mold, fixing a winch on the dragging table, and connecting a wire rope of the winch with the end head of the inner mold to horizontally drag the whole inner mold out of the inner cavity of the box girder;
H. and (3) separating and dismantling the side templates at the two sides, lifting off, penetrating prestressed reinforcements, tensioning, grouting and sealing holes, and finishing the construction of the reinforced concrete box girder with the equal inner cross section.
Claims (5)
1. Equal inner cross section reinforced concrete box girder structure, its characterized in that: the cavity in the box girder is completely the same uniform section from the head end to the other end, and the web plate is gradually thickened outwards at the position close to the two ends;
the box girder comprises three forms, namely a two-end continuous girder, a two-end simply supported girder and a one-end continuous simply supported girder.
2. The equal inner section reinforced concrete box girder structure according to claim 1, wherein: the box girder is provided with one or more groups of reserved holes for the hogging moment tooth blocks at the continuous end, and the hogging moment tooth blocks are arranged on the wing plates in a bilateral symmetry manner.
3. The equal inner section reinforced concrete box girder structure according to claim 1, wherein: and the box girder is provided with an expansion joint connecting reinforcing steel bar at the simply supported end.
4. The equal inner section reinforced concrete box girder structure according to claim 1, wherein: the box girder is half length and is the simply supported roof beam, and half length is continuous roof beam, and box girder outer wing board department both sides equipartition hogging moment tooth piece preformed hole on the length of continuous roof beam.
5. The equal inner section reinforced concrete box girder structure according to claim 1, wherein: and under the condition that the box girder is used as the boundary beam, the wing plate is reserved with anti-collision wall connecting reinforcing steel bars and water drainage holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120254763.4U CN215800928U (en) | 2021-01-29 | 2021-01-29 | Equal internal section reinforced concrete box girder structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120254763.4U CN215800928U (en) | 2021-01-29 | 2021-01-29 | Equal internal section reinforced concrete box girder structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215800928U true CN215800928U (en) | 2022-02-11 |
Family
ID=80125997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120254763.4U Active CN215800928U (en) | 2021-01-29 | 2021-01-29 | Equal internal section reinforced concrete box girder structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215800928U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112554032A (en) * | 2021-01-29 | 2021-03-26 | 广西路建工程集团有限公司 | Equal-inner-section reinforced concrete box girder structure and prefabricating method |
-
2021
- 2021-01-29 CN CN202120254763.4U patent/CN215800928U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112554032A (en) * | 2021-01-29 | 2021-03-26 | 广西路建工程集团有限公司 | Equal-inner-section reinforced concrete box girder structure and prefabricating method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1322211C (en) | Reinforced concrete building floor with solid load-carrying structure | |
| CN114808722A (en) | Construction method of cable-stayed bridge reinforced concrete main beam | |
| CN109025017A (en) | Reinforced concrete hollow overlaps two-way ribbed slab floor and its method of construction | |
| CN116641310B (en) | A reinforced frame arch bridge external concrete formwork system and its construction method | |
| CN114607153B (en) | A hoisting construction technology for long-span cable-stayed multi-layer steel frames | |
| CN112554032A (en) | Equal-inner-section reinforced concrete box girder structure and prefabricating method | |
| CN215800928U (en) | Equal internal section reinforced concrete box girder structure | |
| CN106042173A (en) | bridge production system | |
| CN100560899C (en) | A reinforced concrete three-dimensional load-bearing structure floor | |
| CN214995385U (en) | Scissors type laminated plate type stair assembled in sections | |
| CN101082241B (en) | Formwork for reinforced bar concrete solid load-carrying structural storied building cover | |
| CN216446340U (en) | A prefabricated reinforced concrete beam structure | |
| CN101012681B (en) | Reinforced bar concrete solid load-carrying structural storied building cover | |
| CN112746563A (en) | Totally-enclosed separated operating platform for ultrahigh hollow thin-wall pier and construction method thereof | |
| CN117702624B (en) | Construction method of prefabricated assembly type cross beam of large-span steel tube concrete arch bridge | |
| CN206299120U (en) | A kind of arch formwork for placing | |
| CN222456016U (en) | Hollow box structure of prefabricated cover plate of lock head of ship lock | |
| CN220184419U (en) | Reinforced prefabricated base plate or beam member | |
| CN223647299U (en) | Non-reinforcement laminated slab bottom plate based on inclined grooves formed in plate edges | |
| CN100441804C (en) | Reinforced concrete stereo bearing structure floorslab | |
| CN114016663B (en) | A kind of assembled reinforced concrete beam structure and manufacturing method | |
| CN101016775B (en) | Reinforced concrete tridimensional load-carrying structure floor | |
| CN101173540B (en) | Reinforced concrete building roof with solid load-carrying construction | |
| CN118223403A (en) | Zipper-meshed prefabricated assembly cable tower and construction method thereof | |
| CN100408777C (en) | Steel reinforced concrete stereo force bearing structure floor slab |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |