CN213710150U - Connecting structure of precast concrete stair and ladder beam - Google Patents
Connecting structure of precast concrete stair and ladder beam Download PDFInfo
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- CN213710150U CN213710150U CN202022367976.6U CN202022367976U CN213710150U CN 213710150 U CN213710150 U CN 213710150U CN 202022367976 U CN202022367976 U CN 202022367976U CN 213710150 U CN213710150 U CN 213710150U
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- precast concrete
- wing plate
- concrete stair
- ladder
- upper wing
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Abstract
The utility model discloses a connecting structure of precast concrete stair and ladder beam, which relates to the technical field of steel structure building, the end of a platform slab is lapped on the ladder beam, the end of the upper reinforcing steel bar of the platform slab bends three sections towards an upper wing plate to respectively form a vertical part, a laminating part and an armpit part, the laminating part is laminated on the top surface of the upper wing plate and is connected and fixed, and a bolt nail of the platform slab passes through the laminating part and is connected with the upper wing plate; the bench front end overlap joint is in last pterygoid lamina top, and the landing slab peg that is connected with last pterygoid lamina penetrates in the peg hole that the bench front end was reserved, and grout in the hole fills and constitutes the grout structure. The ladder section and the ladder beam of the precast concrete stair are relatively limited through the bolt holes and the ladder section bolts, the connecting structure has certain rotation abdicating performance, the load of the precast concrete stair is fully transmitted to the ladder beam, and meanwhile, the torque is not transmitted to a stress system, so that the stress mode of the system is more reasonable; meanwhile, the stud holes are grouted, so that the reliability of structural connection is improved, and the stability of the whole structure is ensured.
Description
Technical Field
The utility model relates to a steel construction building technical field, concretely relates to connection structure of precast concrete stair and ladder roof beam.
Background
The progress of building industrialization brings continuous optimization of an assembly type building structure, and a steel structure building is taken as an important component of the assembly type building, is widely applied by the advantages of low resource consumption, less environmental pollution and quick construction rhythm, and provides healthy, applicable, efficient and environment-friendly use space and living environment for people. Precast concrete stair are the structure that is often used for in the steel construction building, and it compares in traditional cast-in-place stair greatly reduced the work load of site operation and shortened the time limit for a project. At present, the connection between precast concrete stair and the ladder beam adopts the connection mode of grouting after the splicing anchor, the seam gap of each precast concrete stair of the connection mode is not easy to control, and the seam is easy to crack in later use, so that the stability of the structure is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model discloses just in order to avoid the weak point that above-mentioned prior art exists, provide a connection structure of precast concrete stair and ladder roof beam.
The utility model discloses a solve technical problem and adopt following technical scheme: a connecting structure of a precast concrete stair and a stair beam comprises precast concrete stairs which are respectively arranged on the stair beams, a platform plate at the tail end of the precast concrete stair positioned in front and a stair section at the front end of the precast concrete stair positioned behind are connected and fixed on the same stair beam, and an end part gap is reserved between the platform plate and the stair section which are arranged on the same stair beam;
the platform plate comprises a pouring structure and platform plate upper part steel bars located on the inner upper part of the pouring structure, the tail end of the platform plate is lapped on the top of the upper wing plate of the ladder beam, the tail end of the platform plate upper part steel bars is bent towards the upper wing plate by three sections to respectively form a vertical part, a fitting part and an armpit part, the fitting part is fitted to the top surface of the upper wing plate and connected and fixed, and a platform plate stud penetrates through the fitting part and is connected with the upper wing plate;
the front end of the ladder section is lapped on a cement mortar layer which is arranged at the top of the upper wing plate and used for leveling, and a vertical bolt hole is reserved at the end part of the ladder section; the cement mortar layer is vertically provided with a ladder-shaped stud with the top end extending to the upper part of the cement mortar layer, the ladder-shaped stud penetrates into the stud hole and forms a hole with the stud hole, grouting is filled in the hole to form a grouting structure, and a molding mortar structure is constructed at the upper opening of the grouting structure;
the polystyrene board is filled in the end gap, the PE rod is densely filled at the upper opening of the end gap, and a glue injection molding structure is injected above the PE rod.
Furthermore, the pouring structure is provided with an armpit structure which inclines upwards at the edge of the upper wing plate, and the bending angle of the armpit structure corresponds to the inclination angle of the armpit structure.
Further, the inclination angle of the haunching structure is 45 degrees.
Further, the attaching portion is connected with the upper wing plate in a welding mode.
Further, the bench bolt is a C-level bolt.
The utility model provides a connection structure of precast concrete stair and ladder roof beam has following beneficial effect:
1. the ladder section and the ladder beam of the precast concrete stair are relatively limited through the bolt holes and the ladder section bolts, the connecting structure has certain rotation abdicating performance, the load of the precast concrete stair is fully transmitted to the ladder beam, and meanwhile, the torque is not transmitted to a stress system, so that the stress mode of the system is more reasonable; meanwhile, the stud holes are grouted, so that the reliability of structural connection is improved, and the stability of the whole structure is ensured;
2. the end part of the pouring structure of the utility model is provided with the haunching structure, so that the stress distribution at the joint of the platform plate and the ladder beam is more uniform, the structural damage caused by stress concentration is avoided, the concrete consumption is reduced, and the control of the construction cost is facilitated;
3. the utility model has the advantages that an end gap is reserved between the platform plate and the bench of the adjacent precast concrete stairs, so as to solve the problem of the existing installation caused by construction errors and machining errors;
4. the utility model discloses a precast concrete stair make in the mill, need not to arrange the scaffold frame in the connection structure construction, greatly reduced the work load of site operation, shortened the time limit for a project, do benefit to construction cost's control.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure:
1. a ladder beam 11, an upper wing plate; 2. the prefabricated concrete stair comprises a prefabricated concrete stair body 21, a platform plate 22, a platform plate stud 23, a platform plate upper portion steel bar 231, a vertical portion 232, a fitting portion 233, an armpit portion 24, a pouring structure 241 and an armpit structure; 25. The step, 251, bolt holes, 26, step bolts, 27, cement mortar layer, 28, grouting structure, 29 and mortar structure; 3. End gap 31, polystyrene board 32, PE rod 33, and glue injection structure.
Detailed Description
To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1, the structural relationship is: the prefabricated concrete staircases comprise prefabricated concrete staircases 2 which are respectively arranged on ladder beams 1, a platform plate 21 at the tail end of the prefabricated concrete staircase 2 positioned in front and a ladder section 25 at the front end of the prefabricated concrete staircase 2 positioned behind are fixedly connected on the same ladder beam 1, and an end part gap 3 is reserved between the platform plate 21 and the ladder section 25 which are arranged on the same ladder beam 1 so as to solve the problem of existing installation caused by construction errors and machining errors;
the platform plate 21 comprises a pouring structure 24 and platform plate upper part steel bars 23 positioned at the inner upper part of the pouring structure 24, the tail end of the platform plate 21 is lapped on the top of the upper wing plate 11 of the ladder beam 1, the tail end of the platform plate upper part steel bars 23 is bent towards the upper wing plate 11 into three sections to respectively form a vertical part 231, a fitting part 232 and an armpit 233, the fitting part 232 is fixedly connected with the top surface of the upper wing plate 11 in a fitting manner, and the platform plate studs 22 penetrate through the fitting part 232 to be connected with the upper wing plate 11 so as to meet the negative bending moment stress requirement of the platform plate upper part steel bars 23 at the ladder;
the front end of the ladder section 25 is lapped on a cement mortar layer 27 which is arranged at the top of the upper wing plate 11 and used for leveling, and a vertical stud hole 251 is reserved at the end part of the ladder section; the cement mortar layer 27 is vertically provided with a stepped stud 26 with the top end extending to the upper part of the cement mortar layer 27, the stepped stud 26 penetrates into the stud hole 251 and forms a pore with the stud hole 251, the pore is filled with grouting to form a grouting structure 28, and the upper opening of the grouting structure is constructed with a molding mortar structure 29;
the end gap 3 is filled with a polystyrene board 31, and the polystyrene board 31 has excellent heat preservation, heat insulation, water resistance, moisture resistance and corrosion resistance, and can meet the performance requirements of the building node area structure; the upper opening of the end gap 3 is densely filled with the PE rod 32, and a glue injection structure 33 is injected and molded above the PE rod 32.
Preferably, the pouring structure 24 is provided with an armpit structure 241 inclined upwards at the edge of the upper wing plate 11, and the bending angle of the armpit 233 is set corresponding to the inclination angle of the armpit structure 241.
Preferably, the inclination angle of the haunching structure 241 is 45 degrees, and the arrangement of the haunching structure 241 ensures that the stress distribution at the joint of the platform plate 21 and the upper wing plate 11 is more uniform, so that structural damage caused by stress concentration is avoided;
preferably, the attaching portion 232 is welded to the upper wing plate 11.
Preferably, the bench pegs 26 are class C pegs.
During the specific construction, the method comprises the following steps:
step one, arranging a platform plate stud 22 at one side of an upper wing plate 11 top of a ladder beam 1, mounting a platform plate 21, bending the tail end of a steel bar 23 at the upper part of the platform plate in three sections towards the upper wing plate 11 to form a vertical part 231, an attaching part 232 and an armpit part 233, and then welding and connecting the attaching part 232 with the upper wing plate 11;
step two, adding liquid at the edge of the upper wing plate 11 at the lower part of the platform plate 21 to form an armpit structure 241, wherein the bending angle of the armpit 233 is adapted to the inclination angle of the armpit structure 241;
step three, arranging a ladder section stud 26 on the other side of the top of the upper wing plate 11 of the ladder beam 1, and constructing cement mortar to form a cement mortar layer 27 for leveling;
step four, overlapping the stair section 25 on the upper wing plate 11, enabling the stair section studs 26 to penetrate into stud holes 251 reserved on the stair section 25, and positioning the precast concrete stair 2;
step five, grouting and forming a grouting structure 28 in a pore formed between the ladder section stud 26 and the stud hole 251, and pressing and forming a mortar structure 29 at the upper opening of the stud hole 251 by mortar;
step six, filling the polystyrene board 31 in the end gap 3, then arranging a PE rod 32 on the top of the polystyrene board 31, injecting glue from the upper opening of the end gap 3, performing compaction and flattening treatment, and forming a glue injection structure 33 to finish construction.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (5)
1. The utility model provides a connection structure of precast concrete stair and ladder beam, is including installing each precast concrete stair (2) on each ladder beam (1) respectively, and one precast concrete stair (2) terminal landing slab (21) that are located the place ahead and bench (25) that are located a precast concrete stair (2) front end of rear are connected and are fixed in same on ladder beam (1), its characterized in that: an end gap (3) is reserved between the platform plate (21) and the bench section (25) which are arranged on the same ladder beam (1);
the platform plate (21) comprises a pouring structure (24) and platform plate upper portion steel bars (23) located on the inner upper portion of the pouring structure (24), the tail end of the platform plate (21) is lapped on the top of an upper wing plate (11) of the ladder beam (1), the tail end of the platform plate upper portion steel bars (23) bends towards the upper wing plate (11) to form three sections, namely a vertical portion (231), a fitting portion (232) and an armpit portion (233), the fitting portion (232) is fitted with the top surface of the upper wing plate (11) to be connected and fixed, and a platform plate stud (22) penetrates through the fitting portion (232) to be connected with the upper wing plate (11);
the front end of the ladder section (25) is lapped on a cement mortar layer (27) which is arranged at the top of the upper wing plate (11) and used for leveling, and a vertical bolt hole (251) is reserved at the end part of the ladder section; the cement mortar layer (27) is vertically provided with a stepped stud (26) with the top end extending to the upper part of the cement mortar layer (27), the stepped stud (26) penetrates into the stud hole (251) and forms a pore with the stud hole (251), a grouting structure (28) is formed by grouting and filling in the pore, and a molding mortar structure (29) is constructed at the upper opening of the pore;
the polystyrene board (31) is filled in the end gap (3), the PE rod (32) is densely filled at the upper opening of the end gap (3), and a glue injection molding and injecting structure (33) is arranged above the PE rod (32).
2. A precast concrete stair and step beam connecting structure according to claim 1, wherein: the pouring structure (24) is characterized in that an armpit structure (241) which inclines upwards is arranged at the edge of the upper wing plate (11), and the bending angle of the armpit portion (233) corresponds to the inclination angle of the armpit structure (241).
3. A precast concrete stair and step beam connection structure according to claim 2, wherein: the inclination angle of the haunching structure (241) is 45 degrees.
4. A precast concrete stair and step beam connecting structure according to claim 1, wherein: the attaching part (232) is connected with the upper wing plate (11) in a welding mode.
5. A precast concrete stair and step beam connecting structure according to claim 1, wherein: the bench stud (26) is a C-grade stud.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022367976.6U CN213710150U (en) | 2020-10-22 | 2020-10-22 | Connecting structure of precast concrete stair and ladder beam |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022367976.6U CN213710150U (en) | 2020-10-22 | 2020-10-22 | Connecting structure of precast concrete stair and ladder beam |
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| CN213710150U true CN213710150U (en) | 2021-07-16 |
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| CN202022367976.6U Active CN213710150U (en) | 2020-10-22 | 2020-10-22 | Connecting structure of precast concrete stair and ladder beam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114941382A (en) * | 2022-05-31 | 2022-08-26 | 中建八局总承包建设有限公司 | Concrete structure and steel stair waterproof node and construction method thereof |
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2020
- 2020-10-22 CN CN202022367976.6U patent/CN213710150U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114941382A (en) * | 2022-05-31 | 2022-08-26 | 中建八局总承包建设有限公司 | Concrete structure and steel stair waterproof node and construction method thereof |
| CN114941382B (en) * | 2022-05-31 | 2023-12-08 | 中建八局总承包建设有限公司 | Waterproof node for concrete structure and steel stair and construction method thereof |
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