CN219931451U - Precast concrete stair section with bottom end beam arranged in step in invisible mode - Google Patents

Precast concrete stair section with bottom end beam arranged in step in invisible mode Download PDF

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Publication number
CN219931451U
CN219931451U CN202321255459.7U CN202321255459U CN219931451U CN 219931451 U CN219931451 U CN 219931451U CN 202321255459 U CN202321255459 U CN 202321255459U CN 219931451 U CN219931451 U CN 219931451U
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precast concrete
section
end beam
bottom end
stair section
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CN202321255459.7U
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Inventor
孟凡林
战美秋
徐帅
李兆杰
李建科
桑思宇
梁媛
殷承诺
孟祥瑞
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Jilin Zhongding Architectural Design Co ltd
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Jilin Zhongding Architectural Design Co ltd
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Abstract

The utility model discloses a precast concrete stair section with a bottom end beam arranged in a step in a stealth manner, belonging to the technical field of building engineering, wherein the bottom end beam of the precast concrete stair section is arranged in a first running step at the bottom of the precast concrete stair section in a stealth manner, so that the length of the precast concrete stair section is shortened, the calculated span and the section size of the precast concrete stair section are reduced, and the consumption of steel bars and concrete is reduced; the folded line section at the bottom end of the precast concrete stair section is canceled, and the precast concrete stair section is prepared by adopting a horizontal die back-forging process with convenient preparation and lower production cost; when the bottom support of the precast concrete stair section is constructed, the top surface of the beam side lug is flush with the top surface of the stair platform plate, sinking is not needed, construction formwork support, binding and concrete pouring are convenient, and the precast concrete stair section is convenient to construct and install; the production and construction costs can be significantly reduced. After the folding line section is eliminated in the precast concrete stair section, the section size is further reduced by adopting a prestress technology, the material consumption is reduced, and the cost is reduced.

Description

Precast concrete stair section with bottom end beam arranged in step in invisible mode
Technical Field
The utility model belongs to the technical field of building construction engineering, relates to a concrete member prefabrication construction technology, and particularly relates to a precast concrete stair section and a preparation method.
Background
In order to avoid the damage of the prefabricated concrete building section in the production, preparation and storage and transportation processes and improve the overall strength and rigidity, the prefabricated concrete building section is provided with end beams at two ends, namely, the bottom end and the top end of the prefabricated concrete building section are provided with end beams, and the end beams at the bottom are usually arranged outside the building section steps, so that the prefabricated concrete building section is in a folded line shape, and pages 8-10 of the national standard atlas (prefabricated reinforced concrete slab building section) (15G 367-1).
For the scissor stairs for high-rise residential buildings, due to the fact that the span is large, the scheme plate thickness of the plate type stairs is large, the plate type stairs reach 200mm, and the folded linear end beams are added, the scissor stairs for high-rise residential buildings are seen from pages 28-30 of the national standard chart set (15G 367-1), the span is large, the dead weight is large, and the lifting is extremely difficult.
The utility model patent application specification CN201810389138.3 discloses a prefabricated prestressed concrete stair, which comprises stair steps, a stair plate and a ribbed beam positioned below the stair plate, wherein the stair plate consists of an inclined stair section and a platform section, and prestressed steel bars are arranged in the ribbed beam. Solves the technical problems that the dead weight of the ladder plate in the plate type stair is large or the rib beam height is high in the beam type stair. However, in the case of a folded ribbed beam, especially in the case of a smaller cross section, the prestressed reinforcement may be damaged when being released, but the prestressed reinforcement does not play a role when the prestress is small or when the prestress is applied by adopting a linear segment or a non-linear segment.
The end beam at the bottom of the precast concrete stairway section is arranged outside the stairway section, and the following defects exist: firstly, the length of the precast concrete stairway section is increased, and the consumption of the precast concrete stairway section concrete and the consumption of the steel bars are increased; secondly, the calculated span of the precast concrete stair section is increased, and the section height and the reinforcement amount are required to be increased; thirdly, the bottom end of the precast concrete stair section needs to be lengthened to be in a folded shape, the precast concrete stair section is difficult to prepare by adopting a horizontal die back-forging process with convenient preparation and lower production cost, and most of the precast concrete stair sections are also prepared by adopting a side-standing production process with higher production cost; fourthly, when the bottom support of the precast concrete stair section is constructed, the beam side lug needs to sink, which not only makes construction formwork, binding and concrete pouring difficult, but also makes construction and installation of the precast concrete stair section inconvenient; fifthly, the prestress applied to the folded precast concrete stair sections is dangerous and difficult, and the advantages of the prestress technology cannot be exerted. These disadvantages not only bring inconvenience to the production, preparation and construction and installation processes, but also raise the construction cost.
There is a need for a new solution to these problems.
Disclosure of Invention
The technical problems to be solved by the utility model are as follows: the utility model provides a precast concrete bench in marking time is stealthy to arrange to bottom end beam, the stealthy arrangement of bottom end beam is in the first marking time of marking time in precast concrete bench's bottom, the length of precast concrete bench has been shortened, the calculation span of precast concrete bench has been reduced, the section of book of precast concrete bench bottom has been cancelled, can adopt the preparation to make things convenient for the lower horizontal mould reverse construction technology preparation precast concrete bench of manufacturing cost, it is more convenient when being under construction to make precast concrete bench's bottom support, production preparation and construction installation work efficiency have been improved, can show reduction in production and construction cost. After the broken line section is eliminated in the precast concrete stair section, the section size can be further reduced by adopting a prestress technology, the material consumption is reduced, and the cost is reduced.
The precast concrete bench in marking time is stealthy to the arrangement of bottom end beam, and precast concrete bench includes bench bottom end beam and bench top end beam, and the stealthy setting of bench bottom end beam is in the first marking time of precast concrete bench bottom.
The precast concrete stair section is a precast concrete slab stair section or a precast concrete beam stair section; the bottom end beam of the building section is a plate-type building section bottom end beam or a beam-type building section bottom end beam; the top end beam of the building section is a plate-type building section top end beam or a beam-type building section top end beam.
Through the design scheme, the utility model has the following beneficial effects: the bottom end beam is arranged in the precast concrete stair section in a hidden manner, and the bottom end beam of the precast concrete stair section is arranged in the first running step at the bottom of the precast concrete stair section in a hidden manner, so that the length of the precast concrete stair section is shortened, the calculated span and the section size of the precast concrete stair section are reduced, and the consumption of steel bars and concrete is reduced; the folded line section at the bottom end of the precast concrete stair section is eliminated, and the precast concrete stair section can be prepared by adopting a horizontal die reverse forging process with convenient preparation and lower production cost; when the bottom support of the precast concrete stair section is constructed, the top surface of the beam side lug is flush with the top surface of the stair platform plate, sinking is not needed, construction formwork support, binding and concrete pouring are convenient, and the precast concrete stair section is convenient to construct and install; the production and construction costs can be significantly reduced. After the broken line section is eliminated in the precast concrete stair section, the section size can be further reduced by adopting a prestress technology, the material consumption is reduced, and the cost is reduced.
Drawings
The utility model is further described with reference to the drawings and detailed description which follow:
FIG. 1 is a schematic longitudinal cross-sectional view of a precast concrete deck section according to the present utility model;
FIG. 2 is a schematic longitudinal cross-sectional view of a precast concrete deck of the present utility model after installation;
FIG. 3 is a schematic longitudinal cross-sectional view of a bottom die and side die of a middle plate stair section of the present utility model;
FIG. 4 is a schematic cross-sectional view of the bottom end beam bottom flat form of the present utility model along the longitudinal direction of the stairway section;
FIG. 5 is a schematic cross-sectional view of the top end beam bucket mold of the present utility model taken longitudinally along the stairway section;
fig. 6 is a schematic longitudinal section view of the prefabricated concrete slab type stair section steel bar of the utility model after being bound;
FIG. 7 is a schematic view of a longitudinal section of a precast concrete slab prepared in accordance with the present utility model after the bottom end beam bottom flat form and the top end beam bucket form are installed in a stairway;
FIG. 8 is a schematic longitudinal cross-sectional view of the precast concrete deck of the present utility model with the bottom end beam bottom flat form and top end beam bucket form removed;
FIG. 9 is a schematic longitudinal cross-sectional view of the precast concrete deck of the present utility model after stripping;
FIG. 10 is a schematic view of a longitudinal section of a precast concrete deck according to the present utility model after a section of the precast concrete deck is demolded and inverted;
FIG. 11 is a schematic view of a longitudinal section of a precast concrete beam at a stair section side rib beam according to the present utility model;
FIG. 12 is a schematic view of a longitudinal section of the precast concrete beam form of the present utility model at the center of a stairway section;
FIG. 13 is a schematic view of a cross-section of the middle thinnest portion of a precast concrete beam type stairway section of the present utility model;
FIG. 14 is a schematic longitudinal cross-sectional view of a precast concrete beam landing stage of the present utility model after installation;
FIG. 15 is a schematic view of a longitudinal cross section of a bottom die and side die of a mid-beam landing stage of the present utility model;
FIG. 16 is a schematic longitudinal cross-sectional view of the precast concrete beam type stairway section reinforcement of the present utility model after binding;
FIG. 17 is a schematic view of a longitudinal section of a prefabricated concrete beam building according to the present utility model after the bottom end beam bottom flat form and the top end beam bucket form are installed;
FIG. 18 is a schematic longitudinal cross-sectional view of the precast concrete beam form of the present utility model with the bottom end beam bottom flat form and top end beam bucket form removed during preparation of the precast concrete beam form;
FIG. 19 is a schematic longitudinal cross-sectional view of a precast concrete beam type stairway section according to the present utility model after stripping;
fig. 20 is a schematic longitudinal section view of the precast concrete beam type stairway section according to the present utility model after demoulding and overturning.
In the figure, a 1-precast concrete slab type stairway, a 2-plate type stairway bottom die and side dies, a 3-bottom end beam bottom flat die, a 4-top end beam bucket die, a 5-plate type stairway reinforcing steel bar, 6-concrete, a 7-precast concrete beam type stairway, an 8-beam type stairway bottom die and side dies, a 9-beam type stairway reinforcing steel bar, a 101-plate type stairway bottom end beam, a 102-plate type stairway top end beam, a 701-beam type stairway bottom end beam and a 702-beam type stairway top end beam.
Detailed Description
The precast concrete stairway section with the bottom end beam arranged in the steps in a stealth manner comprises two forms of precast concrete slab stairway section 1 with the bottom end beam arranged in the steps in a stealth manner as shown in fig. 1 and 2 and precast concrete beam stairway section 7 with the bottom end beam arranged in the steps in a stealth manner as shown in fig. 11-14:
as shown in fig. 1 and 2, the bottom end beam is arranged in a precast concrete slab type stairway section 1 in a hidden manner in the steps, the stairway section is in a plate type structure, and comprises a plate type stairway section bottom end beam 101 and a plate type stairway section top end beam 102, wherein the plate type stairway section bottom end beam 101 is arranged in a first step at the bottom of the precast concrete slab type stairway section 1 in a hidden manner;
as shown in fig. 11 to 14, the bottom end beam is arranged in the precast concrete beam type stairway 7 in a stepping manner, the stairway is in a beam type structure, and comprises a beam type stairway bottom end beam 701 and a beam type stairway top end beam 702, and the beam type stairway bottom end beam 701 is arranged in the first stepping manner at the bottom of the precast concrete beam type stairway 7 in a stealth manner.
Example 1:
the preparation method of the precast concrete slab type stair section with the bottom end beam arranged in the step in a hidden manner, as shown in fig. 1 to 10, comprises the following steps in sequence:
step one, preparing a die
Preparing a bottom die and a side die 2 of a plate type stair section shown in fig. 3 by adopting a traditional method, preparing a bottom end beam bottom flat die 3 shown in fig. 4 and a top end beam bucket-shaped die 4 shown in fig. 5, wherein the top of the bottom end beam bottom flat die 3 is flush with the top planes of the bottom die and the side die 2 of the plate type stair section, and the bottom end beam bottom flat die 3 is matched with the bottom surface of a bottom end beam 101 of the plate type stair section and is movably connected with the bottom die and the side die 2 of the plate type stair section; as shown in fig. 5, the top end beam bucket mold 4 is funnel-shaped, and corresponds to the opening of the side end surface of the top of the precast concrete slab stair section 1, and the top end beam bucket mold 4 is matched with the bottom surface of the top end beam 102 of the slab stair section and is movably connected with the bottom mold and the side mold 2 of the slab stair section;
step two, formwork support binding bar pouring concrete
As shown in fig. 6, the bottom die and the side die 2 of the supporting plate type stair section are used for binding the plate type stair section steel bars 5, the longitudinal stress steel bars of the plate type stair section steel bars 5 are common steel bars or prestressed steel bars, and when the prestressed steel bars are adopted, tensile stress is applied to the prestressed steel bars; then as shown in fig. 7, installing a bottom end beam bottom flat die 3, enabling the top of the bottom end beam bottom flat die 3 to be flush with the top plane of the bottom die and the side die 2 of the plate-type building section, connecting the bottom end beam bottom flat die 3 to the bottom die and the side die 2 of the plate-type building section and fixing, installing a top end beam bucket die 4, enabling an opening of the top end beam bucket die 4 to correspond to the top side end face of the precast concrete slab-type building section 1, and connecting the top end beam bucket die 4 to the bottom die and the side die 2 of the plate-type building section and fixing; pouring concrete 6 into the formwork and vibrating, wherein the concrete 6 of the top end beam 102 of the plate-type building section is poured from the top end beam bucket-shaped formwork 4 and is pressed and vibrated by adopting a plane vibrator until the side end face of the top of the precast concrete slab-type building section 1 is flat, and the exposed face of the concrete 6 is exposed; as shown in fig. 8, the bottom end beam bottom flat die 3 and the top end beam bucket die 4 are removed, and then the film is covered and maintained;
step three, demolding and overturning
As shown in fig. 9, the concrete 6 is demolded after reaching the demolded strength; as shown in fig. 10, the precast concrete slab type stair section 1 is turned over and then stored for stacking;
when the longitudinal stress steel bars of the plate-type stair section steel bars 5 adopt prestress steel bars, the prestress steel bars are firstly put, the steel bars extending out of the precast concrete plate-type stair section 1 are cut off by a cutting machine, and then the precast concrete plate-type stair section 1 is demolded and turned over for storage and stacking for later use;
the preparation method of the precast concrete slab type stair section 1 with the bottom end beam arranged in the tread in a hidden way is completed.
As shown in fig. 2, the installation of the precast concrete deck 1 with the bottom end beam stealth disposed in the step is completed.
Example 2:
the preparation method of the precast concrete beam type stair section with the bottom end beam arranged in the step in a hidden manner, as shown in fig. 3, 4 and 11-20, comprises the following steps in sequence:
step one, preparing a die
Preparing a beam-type stair section bottom die and a side die 8 shown in fig. 15 by adopting a traditional method, preparing a bottom end beam bottom flat die 3 shown in fig. 4 and a top end beam bucket die 4 shown in fig. 5, wherein the top of the bottom end beam bottom flat die 3 is flush with the top planes of the beam-type stair section bottom die and the side die 8, and the bottom end beam bottom flat die 3 is matched with the bottom surface of a beam-type stair section bottom end beam 701 and movably connected with the beam-type stair section bottom die and the side die 8; as shown in fig. 5, the top end beam bucket mold 4 is funnel-shaped, and is opened corresponding to the side end surface of the top of the precast concrete beam type stair section 7, and the top end beam bucket mold 4 is matched with the bottom surface of the top end beam 702 of the beam type stair section and is movably connected with the bottom mold and the side mold 8 of the beam type stair section;
step two, formwork support binding bar pouring concrete
As shown in fig. 16, the bottom die and the side die 8 of the corbel type stair section are used for binding the steel bars 9 of the girder type stair section, the longitudinal stress steel bars of the steel bars 9 of the girder type stair section adopt common steel bars or prestressed steel bars, and when the prestressed steel bars are adopted, tensile stress is applied to the prestressed steel bars; then, as shown in fig. 17, installing a bottom end beam bottom flat die 3, wherein the top of the bottom end beam bottom flat die 3 is flush with the top plane of the beam type building bench bottom die and the side die 8, and connecting and fixing the bottom end beam bottom flat die 3 on the beam type building bench bottom die and the side die 8; then installing a top end beam bucket mold 4, wherein an opening of the top end beam bucket mold 4 corresponds to the top side end surface of the precast concrete beam type building section 7, and connecting and fixing the top end beam bucket mold 4 on the beam type building section bottom mold and the side mold 8; pouring concrete 6 into the templates and vibrating, wherein the concrete 6 of the top end beam 702 of the beam type building bench is poured from the top end beam bucket-shaped mold 4 and is pressed and vibrated by adopting a plane vibrator until the side end surface of the top of the precast concrete beam type building bench 7 is flat, and the exposed surface of the concrete 6 is exposed; as shown in fig. 18, the bottom end beam bottom flat die 3 and the top end beam bucket die 4 are removed, and then the film is covered and maintained;
step three, demolding and overturning
As shown in fig. 19, the concrete 6 is demolded after reaching the demolded strength; as shown in fig. 20, the precast concrete beam type stair section 7 is turned over and then stored for standby;
when the longitudinal stress steel bars of the beam type building section steel bars 9 adopt prestress steel bars, the prestress steel bars are firstly placed, the steel bars extending out of the precast concrete beam type building section 7 are cut off by a cutting machine, and then the precast concrete beam type building section 7 is demolded and turned over for storage and stacking for later use;
the preparation method of the precast concrete beam type stair section 7 with the bottom end beam arranged in the steps in a hidden mode is completed.
As shown in fig. 14, the installation of the precast concrete beam type stairway section 7 with the bottom end beam arranged inside the step is completed.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (2)

1. Precast concrete stair section in marking time is stealthy to arrange to end beam, characterized by: the precast concrete bench comprises a bench bottom end beam and a bench top end beam, and the bench bottom end beam is arranged in the first step of the precast concrete bench bottom in a stealth manner.
2. The precast concrete deck with the bottom end beam stealth disposed in the step of claim 1, wherein: the precast concrete stair section is a precast concrete slab stair section (1) or a precast concrete beam stair section (7); the bottom end beam of the building section is a plate-type building section bottom end beam (101) or a beam-type building section bottom end beam (701); the roof end beam is a plate-type roof end beam (102) or a beam-type roof end beam (702).
CN202321255459.7U 2023-05-23 2023-05-23 Precast concrete stair section with bottom end beam arranged in step in invisible mode Active CN219931451U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202321255459.7U CN219931451U (en) 2023-05-23 2023-05-23 Precast concrete stair section with bottom end beam arranged in step in invisible mode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202321255459.7U CN219931451U (en) 2023-05-23 2023-05-23 Precast concrete stair section with bottom end beam arranged in step in invisible mode

Publications (1)

Publication Number Publication Date
CN219931451U true CN219931451U (en) 2023-10-31

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ID=88500615

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Application Number Title Priority Date Filing Date
CN202321255459.7U Active CN219931451U (en) 2023-05-23 2023-05-23 Precast concrete stair section with bottom end beam arranged in step in invisible mode

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