CN113356489A - Prefabricated beam type scissor stair and construction method thereof - Google Patents
Prefabricated beam type scissor stair and construction method thereof Download PDFInfo
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- CN113356489A CN113356489A CN202110522565.6A CN202110522565A CN113356489A CN 113356489 A CN113356489 A CN 113356489A CN 202110522565 A CN202110522565 A CN 202110522565A CN 113356489 A CN113356489 A CN 113356489A
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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
- E04F11/104—Treads
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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
- E04F11/116—Treads of stone, concrete or like material or with an upper layer of stone or stone like material, e.g. ceramics, concrete; of glass or with an upper layer of glass
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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
- E04F11/104—Treads
- E04F2011/1046—Miscellaneous features of treads not otherwise provided for
- E04F2011/1047—Miscellaneous features of treads not otherwise provided for with means for eliminating squeak
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Steps, Ramps, And Handrails (AREA)
Abstract
A prefabricated beam type scissor stair and a construction method thereof relate to a stair and a construction method thereof, wherein the stair comprises two stair bodies and beam type platform plates which are reversely installed, each stair body comprises a stair section and an L-shaped step plate, the horizontal end of each L-shaped step plate is installed in a flat hole I of a kicking surface of each stair section, the vertical end of each L-shaped step plate is installed in a vertical stepping hole I of each stair section, and the stair sections and the beam type platform plates are connected together through connecting devices. The method comprises the steps of respectively pouring prestressed ribs, reinforcing steel bar nets, ultra-high performance concrete, gypsum powder and gypsum fibers into a bench section and a beam type platform plate, connecting the bench section and the beam type platform plate together, and mounting an L-shaped step plate on the bench section. The stair sections, the L-shaped step plates and the beam type platform plates are prefabricated separately, so that the self weight can be reduced, the transportation is convenient, the assembly is easy, the stair has stronger fire resistance and higher strength due to the adoption of the gypsum powder and the gypsum fibers, the use amount of the ultra-high performance concrete can be reduced, and the cost is saved.
Description
Technical Field
The invention relates to a stair and a construction method thereof, in particular to a prefabricated beam type scissor stair and a construction method thereof.
Background
Due to a complex stress principle of the traditional scissor type stairs, the construction process is complex, the construction needs more working hours, and the construction difficulty of workers is high; the scissor type stairs are a group of vertical stairs with opposite directions, so that more building materials are needed compared with the common stairs, the cost is correspondingly increased, and the scissor type stairs belong to special fire fighting stairs, and the scissor type stairs need to move up and down simultaneously, so that the scissor type stairs have higher fire prevention requirements and high requirements on materials; the cast-in-place stair has the problems of large self weight, large template usage amount, environmental pollution caused by field wet operation and low construction efficiency due to the long construction period and the adoption of reinforced concrete; even if the assembled scissors stair assembled by standard components has the problems of inconvenient transportation, difficult disassembly, inconvenient assembly, poor fireproof performance and low mechanization degree, and the problems of insufficient bearing capacity, overlarge shearing force and the like of the lower column of the beam at the supporting position of the scissors stair.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the prefabricated beam type scissor stair and the construction method thereof are provided to solve the problems of inconvenient transportation, inconvenient assembly, poor fireproof performance, more building materials and high cost of the existing scissor stair.
The technical scheme for solving the technical problems is as follows:
a prefabricated beam type scissor stair comprises two reversely mounted stair bodies and a beam type platform plate, wherein the beam type platform plate is fixedly connected with a wall body; the stair body include bench, L shape flier, the bench openly opens has to mark time and erects hole I, the flat hole I of skirt of bench is installed to the horizontal end of L shape flier, the vertical end of L shape flier is installed the mark time of bench and is erected in the hole I, bench and beam type platform link together through connecting device between, bench and beam type platform equally divide and do not pour by prestressing tendons, reinforcing mesh, ultra high performance concrete, gesso, gypsum fibre and form.
The further technical scheme of the invention is as follows: the volume ratio of the ultra-high performance concrete to the gypsum powder to the gypsum fiber is as follows: 1: 1: 0.003 to 0.006.
The further technical scheme of the invention is as follows: connecting device include that the cross section is the connecting plate of character cut in bas-relief, the bench seted up L shape recess I in the position of connecting beam type landing slab, L shape recess II has been seted up in the position of beam type landing slab corresponding connection bench, the bench is in the same place through the connecting plate lock joint that is located L shape recess I, L shape recess II.
The further technical scheme of the invention is as follows: the stair body further comprises a stair section lengthening part, and the front surface of the stair section lengthening part is provided with a step vertical hole II; the tail part of the ladder section is provided with a riser flat hole II, and the ladder section lengthening part is connected with the tail part of the ladder section through an L-shaped step plate arranged in the step vertical hole II and the riser flat hole II; a reinforcing steel plate is adhered to the back of the joint of the ladder section and the ladder section lengthening component; and a sound absorption material is filled in the hollow part between the L-shaped step plate and the ladder section or the ladder section lengthening part.
The further technical scheme of the invention is as follows: the prefabricated beam type scissor stair further comprises a cross beam and a support column, wherein one end of the cross beam is connected with a wall body, and the other end of the cross beam sequentially penetrates through two reversely-installed bench sections and then is fixed on the wall body on the other side; the support column is formed by pouring a jack and ultrahigh-performance concrete, the top of the support column is connected with the back of the bench, and the bottom of the support column is fixed on the floor slab.
The other technical scheme of the invention is as follows: a construction method of a prefabricated beam type scissor stair comprises the steps of respectively pouring prestressed ribs, a reinforcing mesh of steel bars, ultra-high performance concrete, gypsum powder and gypsum fibers into a bench and a beam type platform slab, wherein the volume ratio of the ultra-high performance concrete, the gypsum powder and the gypsum fibers is as follows: 1: 1: 0.003 to 0.006; and connecting the bench section and the beam type platform plate together through a connecting device, and finally installing an L-shaped step plate on the bench section.
The further technical scheme of the invention is as follows: the method comprises the following steps:
a. making ladder sections
Confirm bench size, step number and play face number, lay prestressing tendons and reinforcing bar reinforcing mesh in bench die cavity and form bench steel bar component, to the bench steel bar component of putting up pouring ultra-high performance concrete, gesso, gypsum fibre, the volume between ultra-high performance concrete, gesso, the gypsum fibre accounts for than being: 1: 1: 0.003 to 0.006; a step vertical hole I and a kick plane flat hole I are reserved in the front of the bench section, and an L-shaped groove I is reserved at the top of the bench section;
b. making beam type platform plate
Lay prestressing tendons and reinforcing bar reinforcing mat at beam type platform slab die cavity and form the landing slab reinforcing bar component, pour ultra high performance concrete, gesso, gypsum fibre to the landing slab reinforcing bar component of putting up, the volume between ultra high performance concrete, gesso, the gypsum fibre accounts for than being: 1: 1: 0.003 to 0.006; reserving an L-shaped groove II in the beam type platform plate corresponding to the L-shaped groove I of the ladder section;
c. making L-shaped step board
According to the size of the ladder section, pouring ultrahigh-performance concrete to manufacture an L-shaped step plate;
d. manufacturing connecting plate
Manufacturing a connecting plate with a concave cross section matched with the L-shaped groove I and the L-shaped groove II according to the L-shaped groove I and the L-shaped groove II;
e. assembled prefabricated beam type scissor stair
Align L shape recess I of bench and beam type landing slab's L shape recess II, will insert L shape recess I, L shape recess II as connecting device's connecting plate and link together bench and beam type landing slab, again with bench and wall connection, install L shape step board at last on the bench to hollow department between L shape step board and bench is filled sound absorbing material.
The further technical scheme of the invention is as follows: and e, filling steel wires into gaps among the L-shaped grooves I, the L-shaped grooves II and the connecting plates, and pouring ultra-high performance concrete into the gaps to connect the bench and the beam type platform plates together.
The invention has the further technical scheme that: when carrying out step a, still reserve at the bench afterbody and have the flat hole of riser II, preparation bench extension part simultaneously, confirm bench extension part size, step number and riser number, lay prestressing tendons and reinforcing bar reinforcing mesh and form bench extension reinforcing bar component, pour ultra high performance concrete, gesso, gypsum fibre to the bench extension reinforcing bar component of putting up, the volume between ultra high performance concrete, gesso, the gypsum fibre accounts for than being: 1: 1: 0.003 to 0.006; a step vertical hole II is reserved in the ladder section lengthening component; and e, when the prefabricated beam type scissor stair is assembled, connecting the ladder section lengthening part with a wall body, connecting the ladder section lengthening part and the tail part of the ladder section together by adopting an L-shaped step plate, coating adhesive on the connecting section of the ladder section and the ladder section lengthening part, pasting a reinforcing steel plate on the back of the connecting part of the ladder section and the ladder section lengthening part, and filling a hollow part between the L-shaped step plate and the ladder section lengthening part with a sound absorption material.
The invention has the further technical scheme that: b, reserving a beam hole and a support column hole in the ladder section when the step a is carried out; pouring ultrahigh-performance concrete to manufacture a cross beam, and pouring the jack and the ultrahigh-performance concrete to manufacture a supporting column; and e, when the prefabricated beam type scissor stair is assembled, the cross beam penetrates through the reserved hole of the wall body, the cross beam hole is fixedly connected with the wall body and the stair section, the jack at the top of the support column is matched and connected with the support column hole, and the bottom of the support column is fixed on the floor slab.
Due to the adoption of the structure, compared with the prior art, the prefabricated beam type scissor stair and the construction method thereof have the following beneficial effects:
1. convenient transportation and installation
The stair comprises two reversely-installed stair bodies and beam type platform plates, wherein each stair body comprises a stair section and an L-shaped step plate, the stair section is provided with a step vertical hole I and a kick plane horizontal hole I, the horizontal end of each L-shaped step plate is installed in the kick plane horizontal hole I of the stair section, the vertical end of each L-shaped step plate is installed in the step vertical hole I of the stair section, and the stair section and the beam type platform plates are connected together through a connecting device. Because the ladder section, the L-shaped step plate and the beam type platform plate are prefabricated separately, the self weight of the structure can be reduced, and the transportation and the field assembly are convenient.
2. Good fire-proof performance
The bench section and the beam type platform plate are all formed by pouring prestressed tendons, a reinforcing mesh of steel bars, ultra-high performance concrete (uhpc), gypsum powder and gypsum fibers, wherein the bench plate can be endowed with high fire resistance by pouring the gypsum powder and the gypsum fibers.
3. Less building material and low cost
The bench section and the beam type platform plate are all formed by pouring prestressed ribs, reinforcing steel meshes, ultra-high performance concrete, gypsum powder and gypsum fibers, wherein the usage amount of the ultra-high performance concrete can be reduced by adopting the gypsum powder and the gypsum fibers, and the L-shaped step plate is hollow after being embedded into the bench section and the bench section lengthening component, so that the usage amount of the ultra-high performance concrete can be further reduced, and the material cost is reduced.
4. High strength
The stair sections and the beam type platform plates are all formed by pouring prestressed tendons, reinforcing steel bars, ultra-high performance concrete (uhpc), gypsum powder and gypsum fibers, wherein the mixture of the gypsum powder, the gypsum fibers and the ultra-high performance concrete is a cement-based composite material with ultra-high strength, ultra-high toughness and high durability, and the prefabricated beam type shear stair has the advantages of high strength, ultra-high durability and wear resistance, high rigidity and excellent bending and cracking resistance by combined use.
In addition, the stair body and the beam type platform plate are connected together through connecting plates with concave cross sections in the L-shaped grooves I and the L-shaped grooves II, steel wires are inserted into gaps among the L-shaped grooves I and the L-shaped grooves II and the connecting plates, and ultrahigh-performance concrete is poured into the gaps to firmly connect the stair sections and the beam type platform plate together.
Furthermore, after the adhesive is coated on the connecting section of the tail section of the ladder section and the ladder section lengthening component, the L-shaped step plate is used for connecting the ladder section lengthening component and the tail section of the ladder section together, and finally the back of the connecting part of the ladder section and the ladder section lengthening component is reinforced by adhering the adhesive to the reinforcing steel plate, so that the connecting strength of the connecting part of the tail section of the ladder section and the ladder section lengthening component can be further improved.
Therefore, the strength of the invention is high.
5. Good integrity
The bench, the bench lengthening part and the beam type platform slab are all characterized in that the prestressed tendons and the reinforcing mesh are distributed in the die cavity, and then the ultrahigh-performance concrete, the gypsum powder and the gypsum fibers are poured, so that the ultrahigh-performance concrete bonded with the reinforcing mesh has higher bonding force, and the integrity of the stair can be greatly improved.
6. The construction efficiency is high
According to the invention, the ladder section and the beam type platform plate can be quickly connected together only by inserting the connecting plate into the L-shaped groove I of the ladder section and the L-shaped groove II of the beam type platform plate, so that the connection is more convenient, the connection precision of the ladder section and the beam type platform plate can be effectively improved, and the construction efficiency can be greatly improved.
7. High bearing capacity
The wall-mounted support comprises a cross beam and a support column, wherein one end of the cross beam is connected with a wall body, and the other end of the cross beam sequentially passes through two reversely mounted bench sections and then is fixed on the wall body on the other side; the top of support column is connected with the back of bench, and the bottom of support column is fixed on the floor. Through the supporting effect of the cross beam and the supporting columns, the shearing force of the integral structure of the stair is reduced, and the bearing capacity is effectively improved.
8. The gradient of the stair body can be adjusted, and the construction quality is ensured
The support column is formed by combining the jack with the ultra-high performance concrete through pouring, the support effect of the support column is guaranteed, and meanwhile the support column can be freely stretched through the jack on the top of the support column before pouring, so that the gradient of the stair body can be adjusted on site, and the construction quality is guaranteed.
9. Can compensate for insufficient length of the ladder section caused by calculation deviation
The invention can also combine the specific situation of the construction site, the tail part of the bench is connected with the bench lengthening component, the bench lengthening component can effectively make up the shortage of the bench length caused by the calculation deviation, and the construction is more flexible.
10. Low noise
The sound absorption material such as ceramsite material or sponge material is filled in the hollow part of the L-shaped step plate, so that the problem that the sound absorption material is not easy to absorb due to the fact that the sound absorption material is not easy to absorb is effectively solved
The noise caused by the hollow inside of the L-shaped step plate.
The technical features of the prefabricated beam type scissors stair and the construction method thereof according to the present invention will be further described with reference to the accompanying drawings and embodiments.
Drawings
FIG. 1: embodiment a schematic structural view of the prefabricated beam type scissors stair of the invention;
FIG. 2: the connecting structure of the ladder section, the L-shaped step plate and the beam type platform plate is shown schematically in the first embodiment;
FIG. 3: embodiment one schematic view (side view) of the connection structure of the stair body and the beam platform plate;
FIG. 4: FIG. 3 is a top view;
FIG. 5: the three-dimensional structure of the connecting plate in the first embodiment is schematically shown;
FIG. 6: second embodiment the invention of the prefabricated beam type scissors stairs structure diagram;
FIG. 7: the connecting structure of the ladder section, the L-shaped step plate, the ladder section lengthening part and the beam type platform plate is shown in the second embodiment;
FIG. 8: embodiment three the structure of the prefabricated beam type scissors stair of the invention is schematically shown;
FIG. 9: in the third embodiment, the connecting structure of the ladder section, the L-shaped step plate, the ladder section lengthening part, the cross beam, the support column and the beam type platform plate is shown schematically;
FIG. 10: in the third embodiment, the stair body is connected with the cross beam, the supporting column and the wall body;
in the above drawings, the respective reference numerals are explained as follows:
1-a stair body, wherein the stair body is provided with a plurality of stairs,
11-ladder section, 111-step vertical hole I, 112-riser flat hole I, 113-L-shaped groove I, 114-riser flat hole II,
a 12-L-shaped step plate,
13-ladder section lengthening components, 131-step vertical holes II and 132-reinforced steel plates,
2-beam type platform plate, 201-L-shaped groove II,
3-connecting plates, 4-sound absorption materials, 5-cross beams and 6-supporting columns.
Detailed Description
Example one
The utility model provides a precast beam formula scissors stair, includes stair body 1, beam type landing slab 2 of two reverse installations, wherein:
The beam type platform board 2 is fixedly connected with a wall body, and the beam type platform board 2 is connected with the bench 11 through a connecting device. The connecting device comprises a connecting plate 3 with a concave cross section, and the connecting plate 3 is a carbon fiber plate or an aluminum alloy plate; l shape recess I113 has been seted up at the position of connecting beam type landing slab 2 to bench 11, L shape recess II 201 has been seted up at the position of corresponding connection bench 11 to beam type landing slab 2, connecting plate 3 passes this L shape recess I113, II 201 of L shape and is in the same place bench 11 and beam type landing slab 2 lock joint.
Example two
A prefabricated beam type scissors stair is the same as the first embodiment in basic structure, except that: stair body 1 still including bench extension part 13, bench extension part 13 is pour by prestressing tendons, reinforcing bar reinforcing mesh, ultra high performance concrete, gesso, gypsum fibre and is formed, the volume of ultra high performance concrete, gesso, gypsum fibre between account for than being: 1: 1: 0.003; the front surface of the bench lengthening component 13 is provided with a step vertical hole II 131; the tail part of the ladder section 11 is provided with a riser flat hole II 114, and the ladder section lengthening part 13 is connected with the tail part of the ladder section 11 through an L-shaped step plate 12 arranged in the step vertical hole II 131 and the riser flat hole II 114; the length of the bench caused by calculation deviation can be effectively compensated, the joint of the bench 11 and the bench lengthening component 13 is coated with adhesive, and the back of the joint of the bench 11 and the bench lengthening component 13 is also adhered with a reinforcing steel plate 132; and the sound absorption material 4 such as ceramsite material or sponge material is filled in the hollow part between the L-shaped step plate 12 and the ladder section lengthening part 13.
The second embodiment of the prefabricated beam type scissors stair has the following specific structure:
the utility model provides a precast beam formula scissors stair, includes stair body 1, beam type landing slab 2 of two reverse installations, wherein:
The beam type platform board 2 is fixedly connected with a wall body, and the beam type platform board 2 is connected with the bench 11 through a connecting device. The connecting device comprises a connecting plate 3 with a concave cross section, and the connecting plate 3 is a carbon fiber plate or an aluminum alloy plate; l shape recess I113 has been seted up at the position of connecting beam type landing slab 2 to bench 11, L shape recess II 201 has been seted up at the position of corresponding connection bench 11 to beam type landing slab 2, connecting plate 31 passes this L shape recess I113, L shape recess II 201 with bench 11 and beam type landing slab 2 lock joint together.
As a variation of the second embodiment, the ladder section extension member 13 may be provided with a flat kick hole on the front surface thereof according to the actual length thereof, and a plurality of stages of L-shaped step plates 12 may be mounted on the ladder section extension member 13.
EXAMPLE III
A prefabricated beam type scissors stair is the same as the second embodiment in basic structure, and is different from the second embodiment in that: the stair further comprises a cross beam 5 and a support column 6; one end of the cross beam 5 is connected with the wall body, and the other end of the cross beam sequentially passes through the two reversely-installed bench sections and then is fixed on the wall body on the other side; the support column 6 is formed by pouring a jack and ultrahigh-performance concrete, the top of the support column 6 is connected with the back of the bench, and the bottom of the support column 6 is fixed on a floor slab.
The third embodiment is that the concrete structure of the prefabricated beam type scissors stair is as follows:
the utility model provides a precast beam formula scissors stair, includes stair body 1, beam type landing slab 2, crossbeam 5 and support column 6 of two reverse installations, wherein:
The beam type platform board 2 is fixedly connected with a wall body, and the beam type platform board 2 is connected with the bench 11 through a connecting device. The connecting device comprises a connecting plate 3 with a concave cross section, and the connecting plate 3 is a carbon fiber plate or an aluminum alloy plate; l shape recess I113 has been seted up at the position of connecting beam type landing slab 2 to bench 11, L shape recess II 201 has been seted up at the position of corresponding connection bench 11 to beam type landing slab 2, connecting plate 31 passes this L shape recess I113, L shape recess II 201 with bench 11 and beam type landing slab 2 lock joint together.
The crossbeam 5 is arranged at a position which is about 2/5 away from the top of the bench 11, one end of the crossbeam 5 is connected with a wall, and the other end of the crossbeam 5 sequentially passes through the two oppositely arranged benches and then is fixed on the wall at the other side; the support column 6 is formed by pouring a jack and ultrahigh-performance concrete, the top of the support column 6 is fixedly connected with the back of the bench, and the bottom of the support column 6 is fixed on a floor slab.
Example four
A construction method of a prefabricated beam type scissor stair is disclosed in the embodiment I, and comprises the steps of respectively pouring prestressed ribs, reinforcing steel bars, ultrahigh-performance concrete, gypsum powder and gypsum fibers into a stair section and a beam type platform plate, wherein the volume ratio of the ultrahigh-performance concrete, the gypsum powder and the gypsum fibers is as follows: 1: 1: 0.004; and connecting the bench section and the beam type platform plate together through a connecting device, and finally installing an L-shaped step plate on the bench section.
The method comprises the following steps:
a. making ladder sections
Confirm bench size, step number and play face number, lay prestressing tendons and reinforcing bar reinforcing mesh in bench die cavity and form bench steel bar component, to the bench steel bar component of putting up pouring ultra-high performance concrete, gesso, gypsum fibre, the volume between ultra-high performance concrete, gesso, the gypsum fibre accounts for than being: 1: 1: 0.004; the front of the bench is reserved with a step vertical hole I and a riser flat hole I, and the top of the bench is reserved with an L-shaped groove I.
b. Making beam type platform plate
Lay prestressing tendons and reinforcing bar reinforcing mat at beam type platform slab die cavity and form the landing slab reinforcing bar component, pour ultra high performance concrete, gesso, gypsum fibre to the landing slab reinforcing bar component of putting up, the volume between ultra high performance concrete, gesso, the gypsum fibre accounts for than being: 1: 1: 0.004; an L-shaped groove II is reserved in the beam type platform plate corresponding to the L-shaped groove I of the ladder section.
c. Making L-shaped step board
And (4) pouring ultrahigh-performance concrete to manufacture the L-shaped step plate according to the size of the ladder section.
d. Manufacturing connecting plate
According to the L-shaped groove I and the L-shaped groove II, a connecting plate with a concave cross section is manufactured, wherein the cross section is matched with the L-shaped groove I and the L-shaped groove II, and the connecting plate is a carbon fiber plate or an aluminum alloy plate.
e. Assembled prefabricated beam type scissor stair
Align L shape recess I of bench and beam type platform board's L shape recess II, will insert L shape recess I, L shape recess II as connecting device's connecting plate to with bench and beam type platform board lock joint together, and fill in the steel wire in the space between L shape recess I, L shape recess II and connecting plate, and pour into ultra high performance concrete toward the space and make bench and beam type platform board link firmly together. And connecting the ladder section with the wall body, finally installing an L-shaped step plate on the ladder section, and filling sound absorption materials such as ceramsite materials or sponge materials in the hollow part between the L-shaped step plate 12 and the ladder section 11.
EXAMPLE five
A construction method of a prefabricated beam type scissor stair is the construction method of the prefabricated beam type scissor stair in the second embodiment, and the prefabricated beam type scissor stair is characterized in that prestressed ribs, reinforcing steel bars, ultrahigh-performance concrete, gypsum powder and gypsum fibers are respectively poured into a ladder section and a beam type platform board, wherein the volume ratio of the ultrahigh-performance concrete, the gypsum powder and the gypsum fibers is as follows: 1: 1: 0.003; and connecting the bench section and the beam type platform plate together through a connecting device, and finally installing an L-shaped step plate on the bench section.
The method comprises the following steps:
a. making ladder sections
Confirm bench size, step number and play face number, lay prestressing tendons and reinforcing bar reinforcing mesh in bench die cavity and form bench steel bar component, to the bench steel bar component of putting up pouring ultra-high performance concrete, gesso, gypsum fibre, the volume between ultra-high performance concrete, gesso, the gypsum fibre accounts for than being: 1: 1: 0.003; a step vertical hole I and a kick plane flat hole I are reserved on the front side of the ladder section, an L-shaped groove I is reserved at the top of the ladder section, and a kick plane flat hole II is reserved at the tail of the ladder section;
when carrying out this step a, preparation bench extension part simultaneously, confirm bench extension part size, step number and the playing number, lay prestressing tendons and reinforcing bar reinforcing mesh and form bench extension reinforcing bar component, pour ultra high performance concrete, gesso, gypsum fibre to the bench extension reinforcing bar component of putting up, the volume between ultra high performance concrete, gesso, the gypsum fibre accounts for than being: 1: 1: 0.003; and a step vertical hole II is reserved in the ladder section lengthening component.
b. Making beam type platform plate
Lay prestressing tendons and reinforcing bar reinforcing mat at beam type platform slab die cavity and form the landing slab reinforcing bar component, pour ultra high performance concrete, gesso, gypsum fibre to the landing slab reinforcing bar component of putting up, the volume between ultra high performance concrete, gesso, the gypsum fibre accounts for than being: 1: 1: 0.003; an L-shaped groove II is reserved in the beam type platform plate corresponding to the L-shaped groove I of the ladder section.
c. Making L-shaped step board
And (4) pouring ultrahigh-performance concrete to manufacture the L-shaped step plate according to the size of the ladder section.
d. Manufacturing connecting plate
According to the L-shaped groove I and the L-shaped groove II, a connecting plate with a concave cross section is manufactured, wherein the cross section is matched with the L-shaped groove I and the L-shaped groove II, and the connecting plate is a carbon fiber plate or an aluminum alloy plate.
e. Assembled prefabricated beam type scissor stair
Align L shape recess I of bench and beam type platform board's L shape recess II, will insert L shape recess I, L shape recess II as connecting device's connecting plate and be in the same place bench and beam type platform board lock joint to the steel wire is filled in the space between L shape recess I, L shape recess II and connecting plate, and pour into ultra high performance concrete toward the space and make bench and beam type platform board link firmly together. And connecting the ladder section with the wall body, finally installing an L-shaped step plate on the ladder section, and filling sound absorption materials such as ceramsite materials or sponge materials in the hollow part between the L-shaped step plate 12 and the ladder section 11.
When the prefabricated beam type scissor stair is assembled in the step e, adhesive is coated on the joint section of the tail of the stair section and the stair section lengthening part, the stair section lengthening part is connected with a wall body, the stair section lengthening part is connected with the tail of the stair section by the L-shaped step plate, and finally the back of the joint of the stair section and the stair section lengthening part is reinforced by adhering a reinforcing steel plate with the adhesive; and sound absorption materials such as ceramsite materials or sponge materials are filled in the hollow part between the L-shaped step plate and the ladder section lengthening part.
EXAMPLE six
A construction method of a prefabricated beam type scissor stair is the construction method of the prefabricated beam type scissor stair in the third embodiment, and the prefabricated beam type scissor stair is characterized in that prestressed ribs, reinforcing steel bars, ultrahigh-performance concrete, gypsum powder and gypsum fibers are respectively poured into a ladder section and a beam type platform board, wherein the volume ratio of the ultrahigh-performance concrete, the gypsum powder and the gypsum fibers is as follows: 1: 1: 0.006; and connecting the bench section and the beam type platform plate together through a connecting device, and finally installing an L-shaped step plate on the bench section.
The method comprises the following steps:
a. making ladder sections
Confirm bench size, step number and play face number, lay prestressing tendons and reinforcing bar reinforcing mesh in bench die cavity and form bench steel bar component, to the bench steel bar component of putting up pouring ultra-high performance concrete, gesso, gypsum fibre, the volume between ultra-high performance concrete, gesso, the gypsum fibre accounts for than being: 1: 1: 0.006; a step vertical hole I and a kick plane flat hole I are reserved on the front side of the ladder section, an L-shaped groove I is reserved at the top of the ladder section, and a kick plane flat hole II is reserved at the tail of the ladder section;
when carrying out this step a, preparation bench extension part simultaneously, confirm bench extension part size, step number and the playing number, lay prestressing tendons and reinforcing bar reinforcing mesh and form bench extension reinforcing bar component, pour ultra high performance concrete, gesso, gypsum fibre to the bench extension reinforcing bar component of putting up, the volume between ultra high performance concrete, gesso, the gypsum fibre accounts for than being: 1: 1: 0.003; and a step vertical hole II is reserved in the ladder section lengthening component.
A beam hole is reserved at a position which is about 2/5 away from the top of the stair section, and a support column hole is reserved at a proper position on the back of the stair section (the proper position is obtained through calculation); the beam is made of ultra-high performance concrete by pouring, and the supporting column is made of a jack and the ultra-high performance concrete by pouring.
b. Making beam type platform plate
Lay prestressing tendons and reinforcing bar reinforcing mat at beam type platform slab die cavity and form the landing slab reinforcing bar component, pour ultra high performance concrete, gesso, gypsum fibre to the landing slab reinforcing bar component of putting up, the volume between ultra high performance concrete, gesso, the gypsum fibre accounts for than being: 1: 1: 0.006; an L-shaped groove II is reserved in the beam type platform plate corresponding to the L-shaped groove I of the ladder section.
c. Making L-shaped step board
And (4) pouring ultrahigh-performance concrete to manufacture the L-shaped step plate according to the size of the ladder section.
d. Manufacturing connecting plate
According to the L-shaped groove I and the L-shaped groove II, a connecting plate with a concave cross section is manufactured, wherein the cross section is matched with the L-shaped groove I and the L-shaped groove II, and the connecting plate is a carbon fiber plate or an aluminum alloy plate.
e. Assembled prefabricated beam type scissor stair
Align L shape recess I of bench and beam type platform board's L shape recess II, will insert L shape recess I, L shape recess II as connecting device's connecting plate and be in the same place bench and beam type platform board lock joint to the steel wire is filled in the space between L shape recess I, L shape recess II and connecting plate, and pour into ultra high performance concrete toward the space and make bench and beam type platform board link firmly together. And connecting the ladder section with the wall body, finally installing an L-shaped step plate on the ladder section, and filling sound absorption materials such as ceramsite materials or sponge materials in the hollow part between the L-shaped step plate 12 and the ladder section 11.
When the prefabricated beam type scissor stair is assembled in the step e, adhesive is coated on the joint section of the tail of the stair section and the stair section lengthening part, the stair section lengthening part is connected with a wall body, the stair section lengthening part is connected with the tail of the stair section by the L-shaped step plate, and finally the back of the joint of the stair section and the stair section lengthening part is reinforced by adhering a reinforcing steel plate with the adhesive; and sound absorption materials such as ceramsite materials or sponge materials are filled in the hollow part between the L-shaped step plate and the ladder section lengthening part.
And e, when the prefabricated beam type scissor stair is assembled, the cross beam penetrates through the reserved hole of the wall body, the cross beam hole is fixedly connected with the wall body and the stair section, the jack at the top of the support column is matched and connected with the support column hole, and the bottom of the support column is fixed on the floor slab.
After the angles of the support columns in the third embodiment and the sixth embodiment are adjusted, the jacks can be taken down, and cement columns are used for replacing the jacks to support the stair body.
Claims (10)
1. A prefabricated beam type scissor stair comprises two reversely mounted stair bodies (1) and beam type platform plates (2), wherein the beam type platform plates (2) are fixedly connected with a wall body; the method is characterized in that: stair body (1) including bench (11), L shape step board (12), bench (11) openly have the step to erect in hole I (111), the flat hole I (112) of playing the face of the step (11) is installed to the level end of L shape step board (12), the vertical end of L shape step board (12) is installed in the step of bench (11) and is erected in hole I (111), bench (11) and beam type platform board (2) between link together through connecting device, bench (11) and beam type platform board (2) equally divide and do not pour by prestressing tendons, reinforcing mesh, ultra-high performance concrete, gypsum powder, gypsum fibre and form.
2. The pre-fabricated beam-type scissors stair of claim 1, wherein: the volume ratio of the ultra-high performance concrete to the gypsum powder to the gypsum fiber is as follows: 1: 1: 0.003 to 0.006.
3. The pre-fabricated beam-type scissors stair of claim 2, wherein: connecting device include connecting plate (3) that the cross section is the font of character cut in bas-relief, ladder section (11) seted up L shape recess I (113) in the position of connecting beam type landing slab (2), L shape recess II (201) have been seted up in the position of corresponding connection ladder section (11) in beam type landing slab (2), ladder section (11) and beam type landing slab (2) are in the same place through connecting plate (3) lock joint that are located L shape recess I (113), L shape recess II (201).
4. A pre-fabricated beam-type scissor stair as claimed in claim 3, wherein: the stair body (1) further comprises a stair section lengthening part (13), and the front surface of the stair section lengthening part (13) is provided with a step vertical hole II (131); the tail part of the ladder section (11) is provided with a kicking plane flat hole II (114), and the ladder section lengthening part (13) is connected with the tail part of the ladder section (11) through an L-shaped step plate (12) arranged in the step vertical hole II (131) and the kicking plane flat hole II (114); a reinforcing steel plate (132) is adhered to the back of the joint of the bench (11) and the bench lengthening component (13); the sound absorption material (4) is filled in the hollow part between the L-shaped step plate (12) and the ladder section (11) or the ladder section lengthening part (13).
5. The pre-fabricated beam-type scissors stair of claim 4, wherein: the prefabricated beam type scissor stair further comprises a cross beam (5) and a support column (6), wherein one end of the cross beam (5) is connected with a wall body, and the other end of the cross beam sequentially penetrates through two reversely-installed bench sections and then is fixed on the wall body on the other side; the support column (6) is formed by pouring a jack and ultrahigh-performance concrete, the top of the support column (6) is connected with the back of the bench (11), and the bottom of the support column (6) is fixed on a floor slab.
6. A construction method of a prefabricated beam type scissor stair is characterized by comprising the following steps: the method comprises the steps of respectively pouring prestressed tendons, a reinforcing mesh of steel bars, ultra-high performance concrete, gypsum powder and gypsum fibers into a bench section and a beam type platform slab, wherein the volume ratio of the ultra-high performance concrete, the gypsum powder and the gypsum fibers is as follows: 1: 1: 0.003 to 0.006; and connecting the bench section and the beam type platform plate together through a connecting device, and finally installing an L-shaped step plate on the bench section.
7. The construction method of the precast beam type scissors stair of claim 6, wherein: the method comprises the following steps:
a. making ladder sections
Confirm bench size, step number and play face number, lay prestressing tendons and reinforcing bar reinforcing mesh in bench die cavity and form bench steel bar component, to the bench steel bar component of putting up pouring ultra-high performance concrete, gesso, gypsum fibre, the volume between ultra-high performance concrete, gesso, the gypsum fibre accounts for than being: 1: 1: 0.003 to 0.006; a step vertical hole I and a kick plane flat hole I are reserved in the front of the bench section, and an L-shaped groove I is reserved at the top of the bench section;
b. making beam type platform plate
Lay prestressing tendons and reinforcing bar reinforcing mat at beam type platform slab die cavity and form the landing slab reinforcing bar component, pour ultra high performance concrete, gesso, gypsum fibre to the landing slab reinforcing bar component of putting up, the volume between ultra high performance concrete, gesso, the gypsum fibre accounts for than being: 1: 1: 0.003 to 0.006; reserving an L-shaped groove II in the beam type platform plate corresponding to the L-shaped groove I of the ladder section;
c. making L-shaped step board
According to the size of the ladder section, pouring ultrahigh-performance concrete to manufacture an L-shaped step plate;
d. manufacturing connecting plate
Manufacturing a connecting plate with a concave cross section matched with the L-shaped groove I and the L-shaped groove II according to the L-shaped groove I and the L-shaped groove II;
e. assembled prefabricated beam type scissor stair
Align L shape recess I of bench and beam type landing slab's L shape recess II, will insert L shape recess I, L shape recess II as connecting device and link together bench and beam type landing slab, again with bench and wall connection, install L shape step board at last on the bench to fill sound absorbing material in the hollow department between L shape step board (12) and bench (11).
8. The construction method of the precast beam type scissors stair of claim 7, wherein: and e, filling steel wires into gaps among the L-shaped grooves I, the L-shaped grooves II and the connecting plates, and pouring ultra-high performance concrete into the gaps to connect the bench and the beam type platform plates together.
9. The construction method of the precast beam type scissors stair of claim 8, wherein: when carrying out step a, still reserve at the bench afterbody and have the flat hole of riser II, preparation bench extension part simultaneously, confirm bench extension part size, step number and riser number, lay prestressing tendons and reinforcing bar reinforcing mesh and form bench extension reinforcing bar component, pour ultra high performance concrete, gesso, gypsum fibre to the bench extension reinforcing bar component of putting up, the volume between ultra high performance concrete, gesso, the gypsum fibre accounts for than being: 1: 1: 0.003 to 0.006; a step vertical hole II is reserved in the ladder section lengthening component; and e, when the prefabricated beam type scissor stair is assembled, connecting the ladder section lengthening component with a wall body, connecting the ladder section lengthening component with the tail of the ladder section by adopting an L-shaped step plate, coating adhesive on the joint section of the ladder section (1) and the ladder section lengthening component, sticking a reinforcing steel plate on the back of the joint of the ladder section and the ladder section lengthening component, and filling a sound absorption material in the hollow position between the L-shaped step plate and the ladder section lengthening component.
10. The construction method of the precast beam type scissors stair of claim 9, wherein: b, reserving a beam hole and a support column hole in the ladder section when the step a is carried out; pouring ultrahigh-performance concrete to manufacture a cross beam, and pouring the jack and the ultrahigh-performance concrete to manufacture a supporting column; and e, when the prefabricated beam type scissor stair is assembled, the cross beam penetrates through the reserved hole of the wall body, the cross beam hole is fixedly connected with the wall body and the stair section, the jack at the top of the support column is matched and connected with the support column hole, and the bottom of the support column is fixed on the floor slab.
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