CN113089949B - Construction method of concrete main body structure assembled sliding steel stair - Google Patents
Construction method of concrete main body structure assembled sliding steel stair Download PDFInfo
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- CN113089949B CN113089949B CN202110389577.6A CN202110389577A CN113089949B CN 113089949 B CN113089949 B CN 113089949B CN 202110389577 A CN202110389577 A CN 202110389577A CN 113089949 B CN113089949 B CN 113089949B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/02—Stairways; Layouts thereof
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/02—Stairways; Layouts thereof
- E04F11/022—Stairways; Layouts thereof characterised by the supporting structure
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/02—Stairways; Layouts thereof
- E04F11/022—Stairways; Layouts thereof characterised by the supporting structure
- E04F11/025—Stairways having stringers
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/02—Stairways; Layouts thereof
- E04F11/04—Movable stairways, e.g. of loft ladders which may or may not be concealable or extensible
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/02—Stairways; Layouts thereof
- E04F11/104—Treads
- E04F11/112—Treads of metal or with an upper layer of metal
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/02—Stairways; Layouts thereof
- E04F2011/0203—Miscellaneous features of stairways not otherwise provided for
- E04F2011/0205—Stairways characterised by the use of specific materials for the supporting structure of the treads
- E04F2011/0209—Stairways characterised by the use of specific materials for the supporting structure of the treads mainly of metal
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/02—Stairways; Layouts thereof
- E04F2011/0203—Miscellaneous features of stairways not otherwise provided for
- E04F2011/0205—Stairways characterised by the use of specific materials for the supporting structure of the treads
- E04F2011/021—Stairways characterised by the use of specific materials for the supporting structure of the treads mainly of stone or stone like materials, e.g. concrete; mainly of glass
- E04F2011/0212—Stairways characterised by the use of specific materials for the supporting structure of the treads mainly of stone or stone like materials, e.g. concrete; mainly of glass mainly of concrete
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/02—Stairways; Layouts thereof
- E04F2011/0203—Miscellaneous features of stairways not otherwise provided for
- E04F2011/0205—Stairways characterised by the use of specific materials for the supporting structure of the treads
- E04F2011/021—Stairways characterised by the use of specific materials for the supporting structure of the treads mainly of stone or stone like materials, e.g. concrete; mainly of glass
- E04F2011/0212—Stairways characterised by the use of specific materials for the supporting structure of the treads mainly of stone or stone like materials, e.g. concrete; mainly of glass mainly of concrete
- E04F2011/0214—Stairways characterised by the use of specific materials for the supporting structure of the treads mainly of stone or stone like materials, e.g. concrete; mainly of glass mainly of concrete cast in situ
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- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Steps, Ramps, And Handrails (AREA)
Abstract
The invention discloses a construction method of a concrete main body structure assembled sliding steel stair, which comprises the following steps: firstly, constructing a concrete structure bracket in the same construction period of the concrete main body structure; secondly, prefabricating each part of the steel stair in a factory; thirdly, assembling type installation steel stairs, 301, a construction sliding layer, 302, construction L-shaped support plates, 303, construction of two L-shaped steel ladder beams which are oppositely arranged, 304, construction steel step lug plates, 305, construction steel steps, 306 and a construction buffer layer. According to the invention, the concrete structure corbel is constructed in the same construction period of the concrete main structure, an installation foundation is provided for the steel stair, a large stair component is differentiated into a small component with a simple structure, the small component is prefabricated in a factory, the small component is assembled into the steel stair on the construction site, the steel stair is used for the concrete main structure, and the sliding supports are adopted at two ends, so that the assumption that the rigidity of the stair is not considered in the structural model calculation is met, and the earthquake resistance is facilitated.
Description
Technical Field
The invention belongs to the technical field of concrete main body structure construction steel stairs, and particularly relates to a construction method of a concrete main body structure assembled sliding steel stair.
Background
At present, the country carries out the assembly type building form and develops the industrialized building mode, so a large number of assembly type technologies are promoted, wherein the stair is used as an important force transmission and traffic component in the building, in the reinforced concrete structure, the current construction method mainly adopts a wood mould or a steel mould to cast concrete in situ, and after a certain curing time, the cast reinforced concrete stair is formed after demoulding; or the stairs are prefabricated in a factory and transported to a construction site for installation.
The existing method has the following defects:
first, cast-in-place stair can't assemble, and the prefabricated stair assembly efficiency of mill is too low, can't satisfy the demand of current or future high-end technique.
Secondly, cast-in-place stairs need formwork support, and the stair formwork support is difficult, and the manual input is big, and construction cost is high.
Thirdly, the stair does not meet the requirements of green buildings, pollution is increased, resources are wasted, the stair cannot be reused once being formed, and a large amount of building waste is generated during reconstruction.
Fourthly, the concrete structure is heavy in self weight, the self weight of the whole structure is increased, and the construction is inconvenient.
Fifthly, the actual engineering is not consistent with the calculation model, the stair stiffness exists in the actual engineering, and the stair stiffness is not considered in the main calculation model.
Sixthly, with the development of the times, the new technology comes out endlessly, the requirements of supervision departments and owners on construction quality, cost, technology and the like are higher and higher, and the complex, rigid and rough and laggard technical method is difficult to meet the new construction requirements of modern refinement and flexibility and is gradually eliminated.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a construction method of a concrete main body structure assembled sliding steel stair, which aims at overcoming the defects in the prior art, a concrete structure bracket is constructed in the same construction period of the concrete main body structure, an installation foundation is provided for the steel stair, a large stair component is differentiated into a small component with a simple structure, factory prefabrication is adopted, the small component is assembled into the steel stair on the construction site, the steel stair is used for the concrete main body structure, sliding supports are adopted at two ends, the assumption that the rigidity of the stair is not considered in structural model calculation is met, and the steel stair is beneficial to earthquake resistance and convenient to popularize and use.
In order to solve the technical problems, the invention adopts the technical scheme that: a construction method of a concrete main body structure assembled sliding steel stair is characterized by comprising the following steps:
step one, constructing a concrete structure bracket in the same period of concrete main body structure construction, and the process is as follows:
step 101, adding overhanging reinforcement cages outside the lower part of a beam body of each layer of concrete structural beam positioned in a staircase, and binding the overhanging reinforcement cages and the reinforcement cages of the concrete structural beams together;
102, positioning and mounting a steel embedded part on the overhanging reinforcement cage;
103, pouring the concrete structure beam and simultaneously pouring the concrete structure bracket to enable the concrete structure bracket and the concrete structure beam to be constructed into a whole, and meanwhile, the concrete structure bracket is positioned in a staircase;
step two, prefabricating each part of the steel stair in a factory: prefabricating each part of the steel stair in a factory according to the size of the stair room, and transporting each part of the steel stair to a construction site as required;
each part of the steel stair comprises an L-shaped support plate, a support fixing plate, an L-shaped steel ladder beam, a steel step ear plate and a steel step, wherein steel step mounting holes are formed in the steel step ear plate and the steel step, a strip hole is formed in the L-shaped support plate, and a round hole is formed in the support fixing plate;
step three, assembling and installing the steel stair: installing a layer of steel stairs between two layers of concrete structural beams adjacent to the upper layer and the lower layer of the concrete main structure stairway in an assembling mode along the height direction of the stairway, wherein the installation method of each layer of steel stairs is the same;
regarding concrete structure beams positioned at a lower layer in two layers of concrete structure beams adjacent to each other up and down as low-layer concrete structure beams, and regarding concrete structure beams positioned at a higher layer in two layers of concrete structure beams adjacent to each other up and down as high-layer concrete structure beams; a low-layer concrete structure bracket is constructed on the outer side of the lower part of the low-layer concrete structure beam facing the stairwell, a low-layer steel embedded part is embedded in the low-layer concrete structure bracket, a high-layer concrete structure bracket is constructed on the outer side of the lower part of the high-layer concrete structure beam facing the stairwell, and a high-layer steel embedded part is embedded in the high-layer concrete structure bracket;
when the assembled installation construction is carried out on any layer of steel stair to be installed, the process is as follows:
301, arranging a steel stair low-position sliding layer on the outer surface of a steel plate of a low-layer steel embedded part, and arranging a steel stair high-position sliding layer on the outer surface of a steel plate of a high-layer steel embedded part;
302, mounting a low-layer L-shaped support plate on a low-position sliding layer of the steel stair, wherein the low-layer L-shaped support plate is connected with a low-layer steel embedded part through a low-layer support fixing plate, and a connecting rod of the low-layer steel embedded part, which extends out of a bracket of a low-layer concrete structure, penetrates through a strip hole in the low-layer L-shaped support plate; meanwhile, a high-rise L-shaped support plate is installed on the high-rise steel embedded part and is connected with the high-rise steel embedded part through a high-rise support fixing plate, and a connecting rod of the high-rise steel embedded part, which extends out of a bracket of a high-rise concrete structure, penetrates through a strip hole in the high-rise L-shaped support plate;
303, fixing one ends of two L-shaped steel ladder beams which are oppositely arranged on the upper surface of a horizontal bottom plate of a low-layer L-shaped support plate, wherein one ends of the two L-shaped steel ladder beams are respectively positioned at two ends of the upper surface of the horizontal bottom plate of the low-layer L-shaped support plate, the other ends of the two L-shaped steel ladder beams which are oppositely arranged are fixed on the upper surface of the horizontal bottom plate of a high-layer L-shaped support plate, and the other ends of the two L-shaped steel ladder beams are respectively positioned at two ends of the upper surface of the horizontal bottom plate of the high-layer L-shaped support plate;
step 304, installing M steel step ear plates on the L-shaped steel ladder beam side plates along the length direction of each L-shaped steel ladder beam, wherein 2M steel step ear plates on the two L-shaped steel ladder beams are symmetrically arranged, and M is a positive integer not less than 2;
305, respectively installing a steel step on each pair of oppositely arranged steel step ear plates, wherein M steel steps are sequentially installed between the two L-shaped steel ladder beams in an assembling manner;
and step 306, arranging a steel stair low-position sliding buffer layer between the vertical side plate of the low-layer L-shaped support plate and the upper outer side wall of the low-layer concrete structural beam facing the stairwell, and arranging a steel stair high-position sliding buffer layer between the vertical side plate of the high-layer L-shaped support plate and the upper outer side wall of the high-layer concrete structural beam facing the stairwell.
The construction method of the concrete main body structure assembled sliding steel stair is characterized in that: l shape steel ladder beam includes L shape steel ladder beam curb plate and L shape steel ladder beam flange board, and L shape steel ladder beam flange board is including the high-order horizontal flange board, middle part slope flange board and the low level L shape flange board that connect gradually, the horizontal bottom plate upper surface welding of high-order horizontal flange board and high-rise L shape bedplate, the horizontal flange board in bottom of low level L shape flange board and the horizontal bottom plate upper surface welding of low level L shape bedplate.
The construction method of the concrete main body structure assembled sliding steel stair is characterized in that: the M steel stepping ear plates comprise a flat steel stepping ear plate and M-1L-shaped steel stepping ear plates, the M steel stepping comprises a flat steel stepping and M-1L-shaped steel stepping, the flat steel stepping is installed on the flat steel stepping ear plates, and the L-shaped steel stepping is installed on the L-shaped steel stepping ear plates.
The construction method of the concrete main body structure assembled sliding steel stair is characterized in that: the flat steel steps are connected with the flat steel step ear plates through high-strength bolts, and the L-shaped steel steps are connected with the L-shaped steel step ear plates through high-strength bolts.
The construction method of the concrete main body structure assembled sliding steel stair is characterized in that: and the low-position sliding layer of the steel stair and the high-position sliding layer of the steel stair are graphite powder sliding layers.
The construction method of the concrete main body structure assembly type sliding steel stair is characterized in that: the steel stair low-position slippage buffer layer and the steel stair high-position slippage buffer layer are polystyrene board buffer layers.
Compared with the prior art, the invention has the following advantages:
1. the invention constructs the low-layer concrete structure bracket with the built-in low-layer steel embedded part on the outer side of the lower part of the low-layer concrete structure beam facing the stairwell and constructs the high-layer concrete structure bracket with the built-in high-layer steel embedded part on the outer side of the lower part of the high-layer concrete structure beam facing the stairwell, so as to provide a mounting and fixing foundation for two oppositely-mounted L-shaped steel ladder beams, thereby facilitating the use of the steel stairwell for a concrete structure, wherein the high-layer and low-layer L-shaped support plates are respectively connected with the high-layer and low-layer steel embedded parts through the high-layer and low-layer support fixing plates, the low-position bottom of the L-shaped steel ladder beam is connected with the upper surface of the horizontal bottom plate of the low-layer L-shaped support plate into a whole, the high-position bottom of the L-shaped steel ladder beam is connected with the upper surface of the horizontal bottom plate of the high-layer L-shaped support plate into a whole, no formwork is needed on site, thus reducing formwork material, reducing labor investment, reducing construction cost and meeting the requirement of green buildings, can reduce pollution, save resources and is convenient for popularization and use.
2. The invention sequentially mounts M steel steps between two L-shaped steel ladder beams in an assembling manner, differentiates a large stair component into a small component with a simple structure, adopts factory prefabrication, assembles the small component into the steel stair on a construction site, can be used for the assembling type structure, accords with the current building development direction, can prefabricate all components in the factory and assemble the small component on the site, adopts the existing materials and components on the market and can realize simple processing, the processing process is simple and efficient, and the concrete stair in the original concrete structure is replaced by the assembling type steel structure stair, thereby effectively reducing the dead weight of the structure.
3. The method has simple steps, a sliding layer is constructed between the horizontal bottom plate of the L-shaped support plate and the steel embedded part, a buffer layer is constructed between the vertical side plate of the L-shaped support plate and the outer side wall of the upper part of the concrete structure beam facing the staircase, the connecting rod of the steel embedded part extending out of the bracket of the concrete structure penetrates through the long hole on the L-shaped support plate, the whole structure of the steel staircase can slide under the action of earthquake, the stress is clear and reasonable, and the earthquake resistance is facilitated.
In conclusion, the concrete structure corbel is constructed in the same construction period of the concrete main body structure, an installation foundation is provided for the steel stair, the large stair component is divided into the small component with a simple structure, the small component is prefabricated in a factory, the small component is assembled into the steel stair on a construction site, the steel stair is used for the concrete main body structure, the sliding supports are adopted at two ends, the assumption that the rigidity of the stair is not considered in structural model calculation is met, the earthquake resistance is facilitated, and the popularization and the use are convenient.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
Fig. 1 is a schematic structural view of the concrete main structure fabricated sliding steel staircase.
Fig. 2 is a top view of the mounting plate of fig. 1 with the pedestal removed.
Fig. 3 is a schematic structural diagram of the L-shaped steel ladder beam of the present invention.
Fig. 4 is a top view of fig. 3.
FIG. 5 is a block diagram of a method flow of the present invention.
Description of reference numerals:
1-low-rise concrete structural beam; 2-low-rise concrete structure corbels;
3, low-layer steel embedded parts; 4-a low-position sliding layer of the steel stair;
5-a low-level L-shaped support plate; 6-fixing plate of low-level support;
7-a low-position slippage buffer layer of the steel stair; 8-high-rise concrete structure beam;
9-high-rise concrete structure bracket; 10-high-rise steel embedded parts;
11-high sliding layer of steel stair; 12-high-rise L-shaped support plate;
13-high-rise support fixing plate; 14-a steel stair high-position slip buffer layer;
15-L-shaped steel ladder beam side plates; 16-an L-shaped steel ladder beam flange plate;
17-L-shaped steel step ear plates; 18-flat steel step ear plate;
19-L-shaped steel step; 20-flat steel step;
21-elongated holes; 22-steel step mounting hole.
Detailed Description
As shown in fig. 1 to 5, the construction method of the concrete main body structure fabricated sliding steel stair comprises the following steps:
step one, constructing a concrete structure bracket in the same period of concrete main body structure construction, and the process is as follows:
step 101, adding overhanging reinforcement cages outside the lower part of a beam body of each layer of concrete structural beam positioned in a staircase, and binding the overhanging reinforcement cages and the reinforcement cages of the concrete structural beams together;
102, positioning and installing a steel embedded part on the overhanging reinforcement cage;
103, pouring the concrete structure beam and simultaneously pouring the concrete structure bracket to enable the concrete structure bracket and the concrete structure beam to be constructed into a whole, and meanwhile, the concrete structure bracket is positioned in a staircase;
step two, prefabricating each part of the steel stair in a factory: prefabricating each part of the steel stair in a factory according to the size of the stair room, and transporting each part of the steel stair to a construction site as required;
each part of the steel stair comprises an L-shaped support plate, a support fixing plate, an L-shaped steel ladder beam, a steel step ear plate and a steel step, wherein steel step mounting holes 22 are formed in the steel step ear plate and the steel step, a strip hole 21 is formed in the L-shaped support plate, and a round hole is formed in the support fixing plate;
it should be noted that each part of the steel stair adopts a size standard, and is convenient to process, when the L-shaped support plate is arranged on the lower layer concrete structure bracket 2, the L-shaped support plate is a lower layer L-shaped support plate 5, and when the L-shaped support plate is arranged on the high layer concrete structure bracket 9, the L-shaped support plate is a high layer L-shaped support plate 12; when the support fixing plate is installed on the bracket 2 of the low-rise concrete structure, the support fixing plate is the support fixing plate 6 of the low-rise, and when the support fixing plate is installed on the bracket 9 of the high-rise concrete structure, the support fixing plate is the support fixing plate 13 of the high-rise.
In practical implementation, a low-layer concrete structure bracket with a built-in low-layer steel embedded part is constructed on the outer side of the lower part of a low-layer concrete structure beam facing a stairwell, a high-layer concrete structure bracket with a built-in high-layer steel embedded part is constructed on the outer side of the lower part of a high-layer concrete structure beam facing the stairwell, a mounting and fixing foundation is provided for two oppositely mounted L-shaped steel ladder beams, the steel stairwell is convenient to use for a concrete structure, high-layer and low-layer L-shaped support plates are respectively connected with the high-layer and low-layer steel embedded parts through high-layer and low-layer support fixing plates, the low-position bottom of each L-shaped steel ladder beam is connected with the upper surface of the horizontal bottom plate of the low-layer L-shaped support plate into a whole, the high-position bottom of each L-shaped steel ladder beam is connected with the upper surface of the horizontal bottom plate of each high-layer L-shaped support plate into a whole, a formwork is not required on site, template materials can be reduced, the labor investment is reduced, the construction cost is reduced, and the green building requirements are met, can reduce pollution and save resources.
Step three, assembling and installing the steel stair: installing a layer of steel stairs between two layers of concrete structure beams adjacent to the upper layer and the lower layer of the concrete main structure staircases in an assembling manner along the height direction of the staircases, wherein the installation method of each layer of steel stairs is the same;
regarding the concrete structure beam positioned at the lower layer in the two layers of concrete structure beams adjacent to each other up and down as a low-layer concrete structure beam 1, and regarding the concrete structure beam positioned at the higher layer in the two layers of concrete structure beams adjacent to each other up and down as a high-layer concrete structure beam 8; a low-rise concrete structure bracket 2 is constructed on the outer side of the lower part of the low-rise concrete structure beam 1 facing the stairwell, a low-rise steel embedded part 3 is embedded in the low-rise concrete structure bracket 2, a high-rise concrete structure bracket 9 is constructed on the outer side of the lower part of the high-rise concrete structure beam 8 facing the stairwell, and a high-rise steel embedded part 10 is embedded in the high-rise concrete structure bracket 9;
when the assembled installation construction is carried out on any layer of steel stair to be installed, the process is as follows:
301, arranging a steel stair low-position sliding layer 4 on the outer surface of a steel plate of a low-layer steel embedded part 3, and arranging a steel stair high-position sliding layer 11 on the outer surface of a steel plate of a high-layer steel embedded part 10;
302, mounting a low-level L-shaped support plate 5 on a low-level sliding layer 4 of the steel stair, wherein the low-level L-shaped support plate 5 is connected with a low-level steel embedded part 3 through a low-level support fixing plate 6, and a connecting rod of the low-level steel embedded part 3, which extends out of a bracket 2 of a low-level concrete structure, penetrates through a strip hole 21 in the low-level L-shaped support plate 5; meanwhile, a high-rise L-shaped support plate 12 is installed on the high-rise steel embedded part 10, the high-rise L-shaped support plate 12 is connected with the high-rise steel embedded part 10 through a high-rise support fixing plate 13, and a connecting rod of the high-rise steel embedded part 10, which extends out of a high-rise concrete structure bracket 9, penetrates through a long hole 21 in the high-rise L-shaped support plate 12;
303, fixing one ends of two L-shaped steel ladder beams which are oppositely arranged on the upper surface of a horizontal bottom plate of a low-layer L-shaped support plate 5, wherein one ends of the two L-shaped steel ladder beams are respectively positioned at two ends of the upper surface of the horizontal bottom plate of the low-layer L-shaped support plate 5, fixing the other ends of the two L-shaped steel ladder beams which are oppositely arranged on the upper surface of the horizontal bottom plate of a high-layer L-shaped support plate 12, and respectively positioning the other ends of the two L-shaped steel ladder beams at two ends of the upper surface of the horizontal bottom plate of the high-layer L-shaped support plate 12;
step 304, installing M steel step ear plates on the L-shaped steel ladder beam side plates along the length direction of each L-shaped steel ladder beam, wherein 2M steel step ear plates on the two L-shaped steel ladder beams are symmetrically arranged, and M is a positive integer not less than 2;
305, respectively installing a steel step on each pair of oppositely arranged steel step ear plates, wherein M steel steps are sequentially installed between the two L-shaped steel ladder beams in an assembling manner;
and step 306, arranging a steel stair low-position slippage buffer layer 7 between the vertical side plate of the low-layer L-shaped support plate 5 and the upper outer side wall of the low-layer concrete structural beam 1 facing the staircase, and arranging a steel stair high-position slippage buffer layer 14 between the vertical side plate of the high-layer L-shaped support plate 12 and the upper outer side wall of the high-layer concrete structural beam 8 facing the staircase.
It is characterized by that between two L-shaped steel ladder beams the M steel steps are successively mounted, and the large-scale component of the ladder can be differentiated into small component with simple structure, and can be prefabricated in factory, and can be assembled into steel ladder on the construction site, and can be used for assembling structure, and can meet the current building development direction, and all the components can be prefabricated in factory, and can be assembled on the site, and can be implemented by adopting existent material and components on the market through simple processing process, and its processing process is simple and high-effective, and the concrete ladder in the original concrete structure can be substituted into the assembled steel structure ladder, and can effectively reduce self-weight of structure, and its actual construction method is simple in steps, and between horizontal bottom plate of L-shaped support plate and steel embedded part a slip layer is constructed, and between vertical side plate of L-shaped support plate and concrete structure beam a buffer layer is constructed, and the connecting rod of the steel embedded part extended from concrete structure corbel can be passed through the long strip hole on the L-shaped support plate, under the action of earthquake, the integral structure of the steel stair can slide, the stress is clear and reasonable, the steel stair is beneficial to earthquake resistance, when the actual engineering is entered, only stair load is considered when a calculation model of a main body is established, a stair model is not established, and the rigidity of the stair is not considered in the calculation model under the action of horizontal load, so that the steel stair with two sliding ends is adopted, and the calculation model of a building structure is more consistent.
In this embodiment, the L-shaped steel ladder beam includes L-shaped steel ladder beam curb plate 15 and L-shaped steel ladder beam flange plate 16, and L-shaped steel ladder beam flange plate 16 is including the high level horizontal flange plate, middle part slope flange plate and the low level L shape flange plate that connect gradually, high level horizontal flange plate and the horizontal bottom plate upper surface welding of high-rise L shape bedplate 12, the horizontal flange plate of bottom of low level L shape flange plate and the horizontal bottom plate upper surface welding of low level L shape bedplate 5.
In this embodiment, the M steel step ear plates include a flat steel step ear plate 18 and M-1L-shaped steel step ear plates 17, the M steel steps include a flat steel step 20 and M-1L-shaped steel steps 19, the flat steel step 20 is installed on the flat steel step ear plate 18, and the L-shaped steel steps 19 are installed on the L-shaped steel step ear plates 17.
It should be noted that each L-shaped steel ladder beam side plate 15 is provided with M steel stepping ear plates along the length direction, two L-shaped steel ladder beam side plates 15 are arranged between two adjacent layers of concrete structure beams, that is, 2M steel stepping ear plates are arranged on two L-shaped steel ladder beam side plates 15 between two adjacent layers of concrete structure beams, wherein the 2M steel stepping ear plates include two flat steel stepping ear plates 18 and 2M-2L steel stepping ear plates 17, each two steel stepping ear plates are provided with one steel stepping, one flat steel stepping 20 is assembled on each two flat steel stepping ear plates 18, and one L-shaped steel stepping 19 is assembled on each two L steel stepping ear plates 17.
In actual assembly, the first steel step or the last steel step in the steel steps from bottom to top between two adjacent layers of concrete structure beams is a flat steel step 20, the rest steel steps in the steel steps from bottom to top between two adjacent layers of concrete structure beams are L-shaped steel steps 19, and when the first steel step in the steel steps from bottom to top between two adjacent layers of concrete structure beams is a flat steel step 20, the rest L-shaped steel steps 19 in the steel steps from bottom to top between two adjacent layers of concrete structure beams are inversely installed; when the last steel step in the steel steps from bottom to top between the two adjacent layers of concrete structure beams is the flat steel step 20, the rest L-shaped steel steps 19 in the steel steps from bottom to top between the two adjacent layers of concrete structure beams are installed in the forward direction.
In this embodiment, the flat steel steps 20 are connected to the flat steel step lugs 18 through high-strength bolts, and the L-shaped steel steps 19 are connected to the L-shaped steel step lugs 17 through high-strength bolts.
In this embodiment, the steel stair low-position sliding layer 4 and the steel stair high-position sliding layer 11 are graphite powder sliding layers.
In this embodiment, the steel stair low-position slip buffer layer 7 and the steel stair high-position slip buffer layer 14 are both polystyrene board buffer layers.
During construction, the concrete structure corbel is constructed in the same construction period of the concrete main structure, an installation foundation is provided for the steel stair, a large stair component is divided into small components with simple structures, factory prefabrication is adopted, the small components are assembled into the steel stair on the construction site, the steel stair is used for the concrete main structure, sliding supports are adopted at two ends of the steel stair, the assumption that the rigidity of the stair is not considered in structural model calculation is met, and earthquake resistance is facilitated.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (6)
1. A construction method of a concrete main body structure assembled sliding steel stair is characterized by comprising the following steps:
step one, constructing a concrete structure bracket in the same period of concrete main body structure construction, and the process is as follows:
step 101, adding overhanging reinforcement cages outside the lower part of a beam body of each layer of concrete structural beam positioned in a staircase, and binding the overhanging reinforcement cages and the reinforcement cages of the concrete structural beams together;
102, positioning and mounting a steel embedded part on the overhanging reinforcement cage;
103, pouring the concrete structure beam and simultaneously pouring the concrete structure bracket to enable the concrete structure bracket and the concrete structure beam to be constructed into a whole, and meanwhile, the concrete structure bracket is positioned in a staircase;
step two, prefabricating various parts of the steel stair in a factory: prefabricating each part of the steel stair in a factory according to the size of the stair room, and transporting each part of the steel stair to a construction site as required;
each part of the steel stair comprises an L-shaped support plate, a support fixing plate, an L-shaped steel ladder beam, a steel step ear plate and a steel step, wherein steel step mounting holes (22) are formed in the steel step ear plate and the steel step, a strip hole (21) is formed in the L-shaped support plate, and a round hole is formed in the support fixing plate;
step three, assembling and installing the steel stair: installing a layer of steel stairs between two layers of concrete structural beams adjacent to the upper layer and the lower layer of the concrete main structure stairway in an assembling mode along the height direction of the stairway, wherein the installation method of each layer of steel stairs is the same;
regarding the concrete structure beam positioned at the lower layer in the two layers of concrete structure beams adjacent to each other up and down as a low-layer concrete structure beam (1), and regarding the concrete structure beam positioned at the higher layer in the two layers of concrete structure beams adjacent to each other up and down as a high-layer concrete structure beam (8); a lower concrete structure bracket (2) is constructed on the lower outer side of the lower concrete structure beam (1) facing the stairwell, a low steel embedded part (3) is embedded in the lower concrete structure bracket (2), a high concrete structure bracket (9) is constructed on the lower outer side of the high concrete structure beam (8) facing the stairwell, and a high steel embedded part (10) is embedded in the high concrete structure bracket (9);
when the assembled installation construction is carried out on any layer of steel stair to be installed, the process is as follows:
301, arranging a steel stair low-position sliding layer (4) on the outer surface of a steel plate of a low-layer steel embedded part (3), and arranging a steel stair high-position sliding layer (11) on the outer surface of a steel plate of a high-layer steel embedded part (10);
302, mounting a low-layer L-shaped support plate (5) on a low-position sliding layer (4) of the steel stair, wherein the low-layer L-shaped support plate (5) is connected with a low-layer steel embedded part (3) through a low-layer support fixing plate (6), and a connecting rod of the low-layer steel embedded part (3) extending out of a bracket (2) of a low-layer concrete structure penetrates through a long strip hole (21) in the low-layer L-shaped support plate (5); meanwhile, a high-rise L-shaped support plate (12) is installed on the high-rise steel embedded part (10), the high-rise L-shaped support plate (12) is connected with the high-rise steel embedded part (10) through a high-rise support fixing plate (13), and a connecting rod of the high-rise steel embedded part (10), which extends out of a high-rise concrete structure bracket (9), penetrates through a long hole (21) in the high-rise L-shaped support plate (12);
303, fixing one ends of two oppositely arranged L-shaped steel ladder beams on the upper surface of a horizontal bottom plate of a low-layer L-shaped support plate (5), wherein one ends of the two L-shaped steel ladder beams are respectively positioned at two ends of the upper surface of the horizontal bottom plate of the low-layer L-shaped support plate (5), fixing the other ends of the two oppositely arranged L-shaped steel ladder beams on the upper surface of the horizontal bottom plate of a high-layer L-shaped support plate (12), and respectively positioning the other ends of the two L-shaped steel ladder beams at two ends of the upper surface of the horizontal bottom plate of the high-layer L-shaped support plate (12);
step 304, installing M steel step ear plates on L-shaped steel ladder beam side plates along the length direction of each L-shaped steel ladder beam, wherein 2M steel step ear plates on the two L-shaped steel ladder beams are symmetrically arranged, and M is a positive integer not less than 2;
305, respectively installing a steel step on each pair of oppositely arranged steel step ear plates, wherein M steel steps are sequentially installed between the two L-shaped steel ladder beams in an assembling manner;
and 306, arranging a steel stair low-position slippage buffer layer (7) between a vertical side plate of the low-layer L-shaped support plate (5) and the upper outer side wall of the low-layer concrete structural beam (1) facing the staircase, and arranging a steel stair high-position slippage buffer layer (14) between the vertical side plate of the high-layer L-shaped support plate (12) and the upper outer side wall of the high-layer concrete structural beam (8) facing the staircase.
2. The construction method of the concrete main body structure fabricated sliding steel stair according to claim 1, wherein the concrete main body structure fabricated sliding steel stair is characterized in that: l shape steel ladder beam includes L shape steel ladder beam curb plate (15) and L shape steel ladder beam flange board (16), and L shape steel ladder beam flange board (16) are including the high-order horizontal flange board, middle part slope flange board and the low level L shape flange board that connect gradually, the horizontal bottom plate upper surface welding of high-order horizontal flange board and high-rise L shape bedplate (12), the horizontal flange board in bottom of low level L shape flange board and the horizontal bottom plate upper surface welding of low-rise L shape bedplate (5).
3. The construction method of the concrete main body structure fabricated sliding steel stair according to claim 1, wherein the concrete main body structure fabricated sliding steel stair is characterized in that: the M steel stepping ear plates comprise a flat steel stepping ear plate (18) and M-1L-shaped steel stepping ear plates (17), the M steel stepping comprises a flat steel stepping (20) and M-1L-shaped steel stepping (19), the flat steel stepping (20) is installed on the flat steel stepping ear plate (18), and the L-shaped steel stepping (19) is installed on the L-shaped steel stepping ear plates (17).
4. The construction method of the concrete main body structure fabricated sliding steel stair according to claim 3, wherein the concrete main body structure fabricated sliding steel stair is characterized in that: the plate steel steps (20) are connected with the plate steel step ear plates (18) through high-strength bolts, and the L-shaped steel steps (19) are connected with the L-shaped steel step ear plates (17) through high-strength bolts.
5. The construction method of the concrete main body structure fabricated sliding steel stair according to claim 1, wherein the concrete main body structure fabricated sliding steel stair is characterized in that: the steel stair low-position sliding layer (4) and the steel stair high-position sliding layer (11) are graphite powder sliding layers.
6. The construction method of the concrete main body structure fabricated sliding steel stair according to claim 1, wherein the concrete main body structure fabricated sliding steel stair is characterized in that: the steel stair low-position slippage buffer layer (7) and the steel stair high-position slippage buffer layer (14) are polystyrene board buffer layers.
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| JP2706742B2 (en) * | 1990-07-25 | 1998-01-28 | 株式会社竹中工務店 | Construction method of reinforced concrete stairs, stair handrail precast concrete slab and stair step formwork used for it |
| US20090249714A1 (en) * | 2008-04-03 | 2009-10-08 | Mv Commercial Construction Llc | Precast concrete modular stairwell tower |
| CN203795747U (en) * | 2014-04-15 | 2014-08-27 | 中亿丰建设集团股份有限公司 | Anti-seismic stair with sliding support |
| CN204456693U (en) * | 2014-12-19 | 2015-07-08 | 中国联合工程公司 | A kind of steel work stringer type stairway slidably hinged-support of deck type step plate |
| CN207988380U (en) * | 2018-03-19 | 2018-10-19 | 西安建筑科技大学 | A kind of prefabricated assembled staircase structure |
| CN209891598U (en) * | 2019-03-28 | 2020-01-03 | 福建省建筑设计研究院有限公司 | Light prefabricated assembled stair |
| CN210032404U (en) * | 2019-04-16 | 2020-02-07 | 中国建筑第八工程局有限公司 | Earthquake-proof stairs |
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