CN103790295A - Reinforced concrete stair structure and construction method thereof - Google Patents
Reinforced concrete stair structure and construction method thereof Download PDFInfo
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- CN103790295A CN103790295A CN201410065680.5A CN201410065680A CN103790295A CN 103790295 A CN103790295 A CN 103790295A CN 201410065680 A CN201410065680 A CN 201410065680A CN 103790295 A CN103790295 A CN 103790295A
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Abstract
The invention relates to a reinforced concrete stair structure and a construction method of the reinforced concrete stair structure. The construction method of the reinforced concrete stair structure comprises the steps that stair boards, a stair beam and formworks of platforms are erected; stair board rebars, stair beam rebars and rebars of the platforms are bound, and upper rebars of the stair board rebars, the stair beam rebars and the rebars of the platforms are bound together; concrete pouring is carried out, wherein stair beam concrete is poured to form the stair beam, platform concrete is poured to form the platforms, and the stair board concrete is poured and trowelled to form step structures; buffer structures are arranged between the bottoms of the stair boards and installation surfaces respectively, wherein each buffer structure comprises a movement gap and a first isolation layer arranged on the corresponding installation surface; after the poured concrete solidifies, the stair boards, the stair beam and the formworks of the platforms are disassembled, so that the reinforced concrete stair structure is formed. The construction method of the reinforced concrete stair structure is simple, high in operability and low in cost, and structural damage caused by earthquakes can be avoided.
Description
technical field
The present invention relates to building field, espespecially a kind of reinforced concrete stairs structure and construction method thereof.
background technology
China is a country that earthquake is multiple, and the whole nation, except minority is economized, 6 grades of above earthquakes all occurred.Basic earthquake intensity 6 is spent and the area in above area accounts for whole areas more than 2/3.Earthquake causes casualties serious with economic loss, and its main cause is the destruction of building construction and collapses.Earthquake also reflects that the seismic design of more existing building structure or structural element (as stair) is difficult to meet the demand for security of people to dwelling environment and good life.
A large amount of frame constructions and framework in earthquake) stair of shear wall structure middle frame part suffer comparatively serious destruction, the frame column being connected with stair also damages to some extent.Current, in conventional design, do not consider that stair participate in overall structure co-operation, also do not carry out seismic design to stair self.In fact in earthquake, stair premiere feature should be evacuation, rescue passage, is serving as first anti-vibration defense lines.In the research of the anti-seismic performance to stair, engineering staff has proposed seismic measures and the method for some enhancing structures or member shock resistance, as stair self are carried out to seismic design, strengthen the frame column of staircase or newel is changed into frame column, and staircase design is become to steel concrete or brick shear wall structure etc.Above-mentioned Seismic Design Method and measure can strengthen shock resistance and the earthquake disaster mitigation of stair to a certain extent, but can not fundamentally change the adverse effect of stair to agent structure in building structure, can not change its structural damage pattern, therefore still do not meet the requirement of antidetonation.
summary of the invention
The object of the invention is to overcome the defect of prior art, a kind of reinforced concrete stairs structure and construction method thereof are provided, can solve the problem of shock strength deficiency in existing staircase design and the adverse effect of stair to agent structure.
The technical scheme that realizes above-mentioned purpose is:
The construction method of a kind of reinforced concrete stairs of the present invention, comprising:
Set up the template of gangboard, terraced beam and platform;
Colligation gangboard reinforcing bar, terraced beam steel and platform reinforcing bar, by the top rebars in gangboard reinforcing bar with terraced beam steel together with platform reinforcing bar binding;
Implement concreting, comprising: build terraced beam concrete, form terraced beam; Casting platform concrete, forms platform; Build gangboard concrete, and floating formation ledge structure; Between the bottom of gangboard and installed surface, be provided with buffer structure, described buffer structure comprises free gap and is located at the first separation layer on described installed surface;
After the concrete setting of building, remove the template of gangboard, terraced beam and platform, form reinforced concrete stairs structure.
The top of employing gangboard reinforcing bar is with terraced beam steel together with platform reinforcing bar binding, and then concreting anchoring forms overall structure.Make the sound construction between stair, platform and terraced beam, increase the shock strength of stair entirety.Between gangboard bottom and installed surface, buffer structure is set, this buffer structure is free gap and the first separation layer, cushion in earthquake active force between stair and installed surface structure by the first separation layer, reduce the impact of staircase component on the installed surface rigidity of structure, the horizontal seismic force that stair are born simultaneously also reduces, and is conducive to stair and platform and the integrally-built antidetonation of terraced beam.By free gap being set between gangboard base plate and installed surface, make the gangboard can free shrink under deformation state, present removable state, solve the adverse effect of stair to agent structure, in addition, between stair and platform and terraced beam due to reinforcing bar binding together, into a single integrated structure, can prevent stair landing from platform in earthquake.The stair that adopt above-mentioned construction method to obtain, the earthquake of stair can reduce earthquake generation time, makes stair become the reliable passage of escape and rescue.Construction method is simple, workable simultaneously, and cost is low, can prevent the structural deterioration producing under earthquake.
The further improvement of the construction method of reinforced concrete stairs of the present invention is, when construction first floor stair, described installed surface is ground place ladder beam, first builds ground place ladder beam concrete, then implements the concreting of first floor stair.
The further improvement of the construction method of reinforced concrete stairs of the present invention is, except first floor stair, described installed surface is the platform of lower first floor ladder, after the construction of lower first floor ladder finishes, then carries out the construction of last layer stair.The further improvement of the construction method of reinforced concrete stairs of the present invention is, on ground and platform, forms building coats, is provided with the second separation layer between described building coats and floor.
The further improvement of the construction method of reinforced concrete stairs of the present invention is, the thickness of described the first separation layer is 3 millimeters to 7 millimeters, and the thickness of described the second separation layer is 40 millimeters to 60 millimeters.
A kind of reinforced concrete stairs structure of the present invention, comprise the terraced beam of platform and the gangboard of top and described platform and described terraced beam anchor connection described in platform, support and connection, the bottom of described gangboard be placed on installed surface and and described installed surface between be provided with buffer structure, described buffer structure comprises free gap and is located at the first separation layer on described installed surface.
The further improvement of reinforced concrete stairs structure of the present invention is, the installed surface of first floor stair is ground place ladder beam.
The further improvement of reinforced concrete stairs structure of the present invention is, except first floor stair, described installed surface is the platform of lower first floor ladder.
The further improvement of reinforced concrete stairs structure of the present invention is, on described platform with on ground, is provided with building coats, between described building coats and described gangboard, is provided with the second separation layer.
The further improvement of reinforced concrete stairs structure of the present invention is, the thickness of described the first separation layer is 3 millimeters to 7 millimeters, and described the second separation layer thickness is 40 millimeters to 60 millimeters.
accompanying drawing explanation
Fig. 1 is the flow chart of the construction method of reinforced concrete stairs of the present invention;
Fig. 2 is the schematic diagram of reinforced concrete stairs structure of the present invention;
Fig. 3 is the local enlarged diagram of A position in Fig. 2;
Fig. 4 is the local enlarged diagram of B position in Fig. 2.
the specific embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Fig. 1 has shown the flow process of the construction method of reinforced concrete stairs of the present invention.Fig. 2 has shown the schematic diagram of reinforced concrete stairs structure of the present invention.In reinforced concrete stairs structure of the present invention and construction method thereof, the top that adopts gangboard reinforcing bar with platform reinforcing bar together with terraced beam steel bar colligation, then build anchoring and form an overall structure, make gangboard become as a whole with the terraced beam of platform and platform below, improved overall shock strength.Between gangboard bottom and installed surface, be provided with buffer structure, between gangboard and ground place ladder beam, be provided with the first separation layer and free gap, between gangboard and the platform of lower first floor ladder, be also provided with the first separation layer and free gap, the space of free shrink when free gap provides distortion for gangboard, can cushion the active force between stair and platform and terraced girder construction in earthquake by the first separation layer, reduce the impact of staircase component on platform and terraced girder construction rigidity.It is strong that reinforced concrete stairs structure of the present invention and construction method thereof have antidetonation, reduces the features such as the adverse effect of stair to agent structure.Below in conjunction with accompanying drawing, reinforced concrete stairs structure of the present invention and construction method thereof are described.
As shown in Figure 2, be the schematic diagram of reinforced concrete stairs structure of the present invention.Below in conjunction with Fig. 2, reinforced concrete stairs structure of the present invention is described.
Reinforced concrete stairs structure of the present invention comprises the terraced beam 20 of platform 30, support and connection platform 30 and the gangboard 10 of top and platform 30 and 20 anchor connections of terraced beam, this anchor connection be by gangboard reinforcing bar with platform reinforcing bar together with terraced beam steel bar colligation, then concreting solidifies.The bottom of gangboard 10 is placed on installed surface, and and installed surface between be installed with buffer structure 50.
Reinforced concrete stairs structure of the present invention is in construction, and the bottom of first floor stair is placed on ground place ladder beam.Refer to Fig. 3, it is the bottom of first floor stair and the partial enlarged drawing of ground place ladder beam.Shown in Fig. 3, the bottom of gangboard 10 is placed on ground place ladder beam 20, and be installed with buffer structure 50 between ground place ladder beam 20, buffer structure 50 comprises free gap 501 and is located at the first separation layer 502, the first separation layers 502 on ground place ladder beam 20 below that is placed in free gap 501.As a preferred embodiments of the present invention, on ground, be equipped with building coats 40, the be above the ground level height of the terraced beam 20 in place of building coats 40, is provided with the second separation layer 401 with gangboard 10 junctions, bottom, and the second separation layer joining with stairway step is placed in the inside of stairway step.
Except first floor stair, the bottom of other floor ladders is all placed on the platform of adjacent lower floor stair, take second layer stair and first floor stair junction as example describes.Refer to 4, it is the local enlarged diagram of gangboard bottom and lower first floor ladder platform.Shown in Fig. 4, the bottom of the gangboard 10 of second layer stair is placed on the platform 20 of first floor stair, and be installed with buffer structure 50 between the platform 20 of first floor stair, buffer structure 50 comprises free gap 501 and is located at the first separation layer 502 on the platform 20 of first floor stair, is located at the below of free gap 501.On the platform 20 of first floor stair, be equipped with building coats 40, building coats 40 is provided with the second separation layer 401 with second layer stair connecting place, and this second separation layer 401 is placed in the step inside of second layer stair.
The first separation layer 502 is flexible material, can adopt polytetrafluoroethylene (PTFE), and the thickness of the first separation layer 502 is 3 millimeters to 7 millimeters, and preferred thickness is 5 millimeters.The second separation layer 401 is also flexible material, can adopt polyphenyl lath, and the thickness of the second separation layer 401 is 40 millimeters to 60 millimeters, and preferred thickness is 50 millimeters.Cushion in earthquake active force between stair and terraced girder construction by separation layer, reduce the impact of staircase component on terraced girder construction rigidity, the horizontal seismic force that stair are born simultaneously also reduces, and is conducive to stair and the integrally-built antidetonation of terraced beam.Between gangboard base plate and terraced beam, certain gap is set, this gap is free gap, makes the gangboard can free shrink under deformation state, presents removable state, solves the adverse effect of stair to agent structure.
The beneficial effect of reinforced concrete stairs structure of the present invention is:
Between the terraced beam of the platform on gangboard and its top and this platform below, anchor connection forms overall structure, make stair, platform, with terraced beam between be connected firmly, the shock strength of increase stair entirety.
Between gangboard bottom and installed surface, be provided with separation layer and free gap, this installed surface is ground place ladder beam or the platform for lower first floor ladder, cushion earthquake active force between stair and lower floor's platform or ground place ladder girder construction at the middle and upper levels by separation layer, reduce the impact of staircase component on lower floor's platform and ground place ladder girder construction rigidity, the horizontal seismic force that stair are born simultaneously also reduces, and is conducive to stair and platform and the integrally-built antidetonation of terraced beam.Free gap makes the gangboard can free shrink under deformation state, presents removable state, solves the adverse effect of stair to agent structure.
Adopt reinforced concrete stairs structure of the present invention, the earthquake of stair can reduce earthquake generation time, makes stair become the reliable passage of escape and rescue.Simultaneously simple in structure, workable, cost is low, can prevent the structural deterioration producing under earthquake.
As shown in Figure 1, be the flow chart of the construction method of reinforced concrete stairs of the present invention.Below in conjunction with Fig. 1, the construction method of reinforced concrete stairs of the present invention is described.
Execution step S10, sets up the template of gangboard, terraced beam and platform, first installs the template of bottom and then sets up the template on upper strata.Refer to Fig. 2, the staircase structure schematic diagram of its construction method that is reinforced concrete stairs of the present invention.Shown in Fig. 2, while building the stair of first floor, first install the template of terraced beam 20 and the template of platform 30 terraced beam 20 below of Stall, then install the template of gangboard 10, then set up the template of platform 30.In construction, the stair of first floor bottom is located on ground place ladder beam 20, and the stair bottom of other layers is to be all located on the platform 30 of lower first floor ladder.Then perform step S11.
Execution step S11, colligation gangboard reinforcing bar, terraced beam steel and platform reinforcing bar.Shown in Fig. 4, colligation ladder beam steel 201 in the template of terraced beam 20, colligation gangboard reinforcing bar 101 in the template of gangboard 10, colligation platform reinforcing bar 301 in the template of platform 30, by the top of gangboard reinforcing bar 101 with terraced beam steel 201 together with 301 colligations of platform reinforcing bar, make after follow-up concreting, together with gangboard reinforcing bar 101 and terraced beam steel 201 and platform reinforcing bar 301 are anchored at, the terraced beam 20 of the platform 30 that gangboard 10 is connected with its top and platform 30 belows has formed an overall structure, has strengthened the shock strength of stair entirety.Then perform step S12.
Execution step S12, implements concreting, forms the ledge structure of terraced beam, platform and gangboard.Shown in Fig. 3, show the enlarged diagram of A position in Fig. 2.In the time that stair are constructed, should first the construction of ground floor be completed, according to prior design, the bottom of first floor stair is placed on ground place ladder beam, so before construction first floor stair, first build the terraced beam at first floor stair bottom place, be ground place ladder beam 20, after the concreting of ground place ladder beam 20 completes, at the top of ground place ladder beam 20, the first separation layer 502 be set, the first separation layer 502 adopts flexible material, can be polytetrafluoroethylene (PTFE) or cement mortar.The thickness of the first separation layer 502 is 3 millimeters to 7 millimeters, and preferred thickness is 5 millimeters.Cushion in earthquake active force between stair and terraced girder construction by separation layer, reduce the impact of staircase component on terraced girder construction rigidity, the horizontal seismic force that stair are born simultaneously also reduces, and is conducive to stair and the integrally-built antidetonation of terraced beam.
After the ladder beam concreting of ground place is good, can build the terraced beam concrete at first floor stair top, build the ledge structure of the terraced beam, platform and the first floor stair that form first floor stair top.Shown in Fig. 4, due to gangboard reinforcing bar 101, terraced beam steel 201 and platform reinforcing bar 301 at platform 30 together with the colligation of the junction of gangboard 10, the concrete of building by above-mentioned Bar Anchorage together, make the terraced beam 20 of the connected platform 30 of stair and platform 30 belows form overall structure, increase overall shock strength, can also prevent stair landing from platform in earthquake.Then perform step S13.
Execution step S13, is installed with buffer structure in bottom and the installed surface junction of gangboard.Shown in Fig. 3, the bottom of first floor stair gangboard 10 is located on ground place ladder beam 20, and be installed with buffer structure 50 between ground place ladder beam 20, buffer structure 50 comprises free gap 501 and is located at the first separation layer 501 on ground place ladder beam 20, this free gap makes the gangboard can free shrink under deformation state, present removable state, solve the adverse effect of stair to agent structure.In the construction of first floor stair, the simultaneously construction of the building coats 40 of face, the be above the ground level height of the terraced beam 20 in place of this building coats 40, is provided with the second separation layer 401 with gangboard 10 junctions, and the second separation layer joining with stairway step is placed in the inside of stairway step.The second separation layer 401 adopts flexible material, and this flexible material is polyphenyl lath.The thickness of the second separation layer 401 is 40 millimeters to 60 millimeters, and preferred thickness is 50 millimeters.
Shown in Fig. 4, build and form after platform 30, between platform 30 and the gangboard 10 of last layer stair, buffer structure 50 is set, buffer structure 50 comprises free gap 501 and is located at the first separation layer 502 on the platform 30 of first floor stair, and the platform 30 of first floor stair is installed surfaces of second layer stair gangboard.The first separation layer 502 adopts flexible material, can be polytetrafluoroethylene (PTFE) or cement mortar.The thickness of the first separation layer 502 is 3 millimeters to 7 millimeters, and preferred thickness is 5 millimeters.Cushion in earthquake active force between stair and platform structure by separation layer, reduce the impact of staircase component on platform structure rigidity, the horizontal seismic force that stair are born simultaneously also reduces, and is conducive to the integrally-built antidetonation of stair and platform.
After platform 30 forms, can carry out the construction of the building coats 40 at these platform 30 places, when construction building surface layer 40, with last layer stair gangboard 10 junctions, the second separation layer 401, the second separation layers 401 are set and adopt flexible material, this flexible material is polyphenyl lath.The thickness of the second separation layer is 40 millimeters to 60 millimeters, and preferred thickness is 50 millimeters.Then perform step S14.
Execution step S14, after concrete setting, removes gangboard template, terraced beam forms and platform template.
So just complete the construction of first floor stair, then the above-mentioned steps that circulates, is from the different of first floor stair, construction second layer stair, the bottom of second layer stair gangboard 10 is to be placed on first floor landing 30, and is provided with buffer structure 50 between first floor landing 30.While constructing the 3rd floor ladder, the bottom of the 3rd floor ladder gangboard is to be placed on the platform of second layer stair, and is provided with buffer structure 50 between second layer landing, and the above-mentioned construction sequence of repetitive cycling is until stair construction is complete.
Adopt the beneficial effect of the construction method of reinforced concrete stairs of the present invention:
The top of employing gangboard reinforcing bar is with terraced beam steel together with platform reinforcing bar binding, and then concreting anchoring forms overall structure.Make the sound construction between stair, platform and terraced beam, increase the shock strength of stair entirety.
Between gangboard bottom and platform and between gangboard and terraced beam, separation layer is set, cushion in earthquake active force between stair and platform and terraced girder construction by separation layer, reduce the impact of staircase component on platform and terraced girder construction rigidity, the horizontal seismic force that stair are born simultaneously also reduces, and is conducive to stair and platform and the integrally-built antidetonation of terraced beam.
Between gangboard base plate and platform and between gangboard and terraced beam, certain gap is being set, this gap is free gap, makes the gangboard can free shrink under deformation state, presents removable state, solves the adverse effect of stair to agent structure.
In addition, between stair and platform and terraced beam due to reinforcing bar binding together, into a single integrated structure, can prevent stair landing from platform in earthquake.The stair that adopt above-mentioned construction method to obtain, the earthquake of stair can reduce earthquake generation time, makes stair become the reliable passage of escape and rescue.Construction method is simple, workable simultaneously, and cost is low, can prevent the structural deterioration producing under earthquake.
Below embodiment has been described in detail the present invention by reference to the accompanying drawings, and those skilled in the art can make many variations example to the present invention according to the above description.Thereby some details in embodiment should not form limitation of the invention, the present invention by the scope defining using appended claims as protection scope of the present invention.
Claims (10)
1. a construction method for reinforced concrete stairs, is characterized in that, comprising:
Set up the template of gangboard, terraced beam and platform;
Colligation gangboard reinforcing bar, terraced beam steel and platform reinforcing bar, by the top of gangboard reinforcing bar with terraced beam steel together with platform reinforcing bar binding;
Implement concreting, comprising: build terraced beam concrete, form terraced beam; Casting platform concrete, forms platform; Build gangboard concrete, and floating formation ledge structure; Between the bottom of gangboard and installed surface, be provided with buffer structure, described buffer structure comprises free gap and is located at the first separation layer on described installed surface;
After the concrete setting of building, remove the template of gangboard, terraced beam and platform, form reinforced concrete stairs structure.
2. the construction method of reinforced concrete stairs as claimed in claim 1, is characterized in that, when construction first floor stair, described installed surface is ground place ladder beam, first builds ground place ladder beam concrete, then implements the concreting of first floor stair.
3. the construction method of reinforced concrete stairs as claimed in claim 2, is characterized in that, except first floor stair, described installed surface is the platform of lower first floor ladder, after the construction of lower first floor ladder finishes, then carries out the construction of last layer stair.
4. the construction method of reinforced concrete stairs as claimed in claim 3, is characterized in that, on ground and platform, forms building coats, is provided with the second separation layer between described building coats and gangboard.
5. the construction method of reinforced concrete stairs as claimed in claim 4, is characterized in that, the thickness of described the first separation layer is 3 millimeters to 7 millimeters, and described the second separation layer thickness is 40 millimeters to 60 millimeters.
6. a reinforced concrete stairs structure, it is characterized in that, comprise the terraced beam of platform and the gangboard of top and described platform and described terraced beam anchor connection described in platform, support and connection, the bottom of described gangboard be placed on installed surface and and described installed surface between be provided with buffer structure, described buffer structure comprises free gap and is located at the first separation layer on described installed surface.
7. reinforced concrete stairs structure as claimed in claim 6, is characterized in that, the installed surface of first floor stair is ground place ladder beam.
8. reinforced concrete stairs structure as claimed in claim 7, is characterized in that, except first floor stair, described installed surface is the platform of lower first floor ladder.
9. reinforced concrete stairs structure as claimed in claim 8, is characterized in that, on described platform with on ground, is provided with building coats, between described building coats and described gangboard, is provided with the second separation layer.
10. reinforced concrete stairs structure as claimed in claim 9, is characterized in that, the thickness of described the first separation layer is 3 millimeters to 7 millimeters, and described the second separation layer thickness is 40 millimeters to 60 millimeters.
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| CN104533033A (en) * | 2014-12-17 | 2015-04-22 | 苏州工业园区设计研究院股份有限公司 | Ladder adopting sliding ladder beam |
| CN107642207A (en) * | 2017-10-31 | 2018-01-30 | 江苏金贸科技发展有限公司 | A kind of assembled stair attachment means |
| CN110219422A (en) * | 2019-07-01 | 2019-09-10 | 中国建筑第五工程局有限公司 | Anti-seismic concrete staircase design method |
| CN111485686A (en) * | 2019-01-25 | 2020-08-04 | 河南天久装配式建筑有限公司 | Light sandwich reinforced concrete stair structure and construction method |
| CN111706017A (en) * | 2020-06-10 | 2020-09-25 | 中和华丰建设有限责任公司 | Reinforced concrete stair construction method |
| CN113653274A (en) * | 2021-08-26 | 2021-11-16 | 中信建筑设计研究总院有限公司 | Method for processing insufficient net height of stair platform |
| 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104533033A (en) * | 2014-12-17 | 2015-04-22 | 苏州工业园区设计研究院股份有限公司 | Ladder adopting sliding ladder beam |
| CN107642207A (en) * | 2017-10-31 | 2018-01-30 | 江苏金贸科技发展有限公司 | A kind of assembled stair attachment means |
| CN111485686A (en) * | 2019-01-25 | 2020-08-04 | 河南天久装配式建筑有限公司 | Light sandwich reinforced concrete stair structure and construction method |
| CN110219422A (en) * | 2019-07-01 | 2019-09-10 | 中国建筑第五工程局有限公司 | Anti-seismic concrete staircase design method |
| CN111706017A (en) * | 2020-06-10 | 2020-09-25 | 中和华丰建设有限责任公司 | Reinforced concrete stair construction method |
| CN113653274A (en) * | 2021-08-26 | 2021-11-16 | 中信建筑设计研究总院有限公司 | Method for processing insufficient net height of stair platform |
| CN113653274B (en) * | 2021-08-26 | 2022-09-06 | 中信建筑设计研究总院有限公司 | Method for processing insufficient net height of stair platform |
| 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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| CN103790295B (en) | 2016-08-17 |
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