A fully prefabricated combined staircase

Abstract

The present invention belongs to the field of prefabricated buildings, and more particularly relates to a fully prefabricated combined staircase. It includes a prefabricated staircase, prefabricated ladder beams, prefabricated landing platforms, and prefabricated ladder columns for supporting the prefabricated landing platforms. The prefabricated ladder beams are connected to the prefabricated staircase, the prefabricated staircase is connected to the prefabricated landing platform, and the prefabricated landing platform is connected to the prefabricated ladder columns all through reinforced grouting. In the present invention, the ladder columns, ladder beams, and landing platform slabs are all prefabricated, enabling the entire staircase to adopt prefabricated construction, avoiding the embarrassing situation of using in-situ construction for half and prefabricated construction for the other half, improving the construction speed and quality of the project, and reducing the cost.

Description

Technical Field

[0001] The present invention belongs to the field of prefabricated buildings, and more specifically relates to a fully prefabricated combined staircase. Background Art

[0002] In recent years, prefabricated buildings and industrial modernization have developed rapidly in my country. The Guiding Opinions on Vigorously Developing Prefabricated Buildings further clarified that we should actively promote green buildings and building materials in the future, and strive to increase the proportion of prefabricated buildings to 30% of new buildings in about 10 years.

[0003] In existing prefabricated concrete building stairs, the staircase columns, staircase beams and rest platforms are usually cast in situ. If only the staircase sections are prefabricated, it is inevitable that there will be deviations in the size and position of the cast-in-situ embedded parts, which will make it difficult to install the stairs later, or even impossible to install them.

[0004] At the same time, the rest platform and the ladder beams and columns need to be cast in advance using wooden molds, which will inevitably affect the construction period and waste resources. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a fully prefabricated combined staircase to improve the speed and quality of engineering construction and reduce the cost.

[0006] The present invention is achieved in that:

[0007] A fully prefabricated combined staircase comprises a prefabricated staircase, a prefabricated staircase beam, a prefabricated resting platform and a prefabricated staircase column for supporting the prefabricated resting platform, wherein the prefabricated staircase beam and the prefabricated staircase, the prefabricated staircase and the prefabricated resting platform, and the prefabricated resting platform and the prefabricated staircase column are all connected by steel bar grouting.

[0008] The connection between the prefabricated ladder beam and the prefabricated staircase, and between the prefabricated staircase and the prefabricated resting platform are all undertaken by an L-shaped structure.

[0009] The prefabricated rest platform includes an integrally formed platform plate, an L-shaped beam, and a rectangular beam. The L-shaped beam and the rectangular beam are respectively arranged on both sides of the platform plate and are both provided with slots for inserting the prefabricated stair columns. The horizontal end of the L-shaped beam is longitudinally pre-embedded with a plurality of anchor bolts for connecting the prefabricated stairs.

[0010] A groove is arranged at the top center of the prefabricated ladder column, and steel bars corresponding to the groove holes are pre-embedded in the prefabricated ladder column so that the steel bars are inserted into the groove holes for connection.

[0011] The cross-sectional height of the prefabricated ladder column is equal to the beam width of the L-shaped beam, and the cross-sectional width of the prefabricated ladder column is the beam width of the rectangular beam.

[0012] The number of the prefabricated ladder columns is four.

[0013] The number of the prefabricated stairs is at least two.

[0014] The prefabricated ladder column is connected to the floor slab via a plurality of grouting sleeves preset inside the lower section of the prefabricated ladder column.

[0015] The lower end of the prefabricated staircase is provided with a channel corresponding to the anchor bolt pre-buried in its connecting structure; the diameter of the channel is larger at the top and smaller at the bottom, and is divided into a large-mouth channel and a small-mouth channel. When connected, the bottom of the large-mouth channel is sealed by an anchor bolt fastener, and grouting material is poured into the large-mouth channel, and the grouting material is fastened and solidified to the upper part of the anchor bolt as a whole.

[0016] The anchor bolt fastener comprises a gasket for blocking the large-mouthed channel and a nut matching the anchor bolt.

[0017] The length of the large-mouth channel is smaller than the length of the small-mouth channel.

[0018] The term "several" in the present application refers to two or more than two.

[0019] The "rebar grouting connection" in this application refers to inserting the rebar into the through hole and then grouting the through hole so that the grouting material and the rebar are fastened and solidified into one to form a connection structure.

[0020] The advantages of the present invention are:

[0021] 1. The original staircase with only prefabricated stair section plates is changed to prefabricated stair columns, stair beams, and rest platform plates, so that the entire staircase is constructed in an assembled manner, avoiding the embarrassing situation of using half of the staircase using cast-in-place technology and half of the staircase using prefabrication technology.

[0022] 2. The original rest platform beams and slabs are integrated and prefabricated, which reduces the number of hoisting times, reduces the mold sealing and cast-in-place operations of the composite components, and improves construction efficiency.

[0023] 3. The rest platform and prefabricated ladder columns are connected by steel bars + grouting, which reduces the sealing and cast-in-place operations of the beam-column nodes and improves construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with embodiments with reference to the accompanying drawings.

[0025] Figure 1 It is a structural schematic diagram of the present invention.

[0026] Figure 2 This is a structural diagram of a prefabricated rest platform.

[0027] Figure 3 for Figure 2 Side view of.

[0028] Figure 4 It is a connection structure diagram of the upper end of a precast staircase and a precast landing or precast ladder beam.

[0029] Figure 5 It is a connection structure diagram of the lower end of a precast staircase. Specific implementation mode

[0030] Embodiment 1

[0031] For the stairs of existing precast concrete buildings, usually the stair columns, stair beams, and landings are cast in situ. Only the stair flights are precast stairs. It is inevitable that there are deviations in the sizes and positions of the in-situ embedded parts, and it is relatively difficult to install the stairs later, or even impossible to install them. The present invention provides a fully precast combined staircase, as Figure 1 shown. A fully precast combined staircase of the present invention includes a precast staircase 1, a precast ladder beam 2, precast stair columns 3, and a precast landing 4.

[0032] As Figure 2 , Figure 3 shown, the precast landing 4 includes a platform slab 41, an L-shaped beam 42, and a rectangular beam 43 that are integrally formed. The L-shaped beam 42 and the rectangular beam 43 are respectively arranged on both sides of the platform slab 41, and both are provided with slot holes 44 for connecting the precast stair columns 3.

[0033] A groove 31 is provided at the center of the top of the precast stair column 3, which plays a role in connection and leveling. Since the stair column is precast, there may be dimensional errors. The design of the groove 31 can avoid uneven stress caused by uneven surfaces, making the integrity better after grouting connection. Reinforcing bars 33 corresponding to the slot holes 44 are embedded in the precast stair column 3, so that the reinforcing bars 33 are inserted into the slot holes 44 for connection

[0034] The number of the precast stair columns 3 is four.

[0035] The number of the precast staircases 1 is two, forming a double-run staircase.

[0036] The precast stair column 3 is connected to the lower floor slab through a plurality of grouting sleeves 32 preset at the bottom of the precast stair column 3. By embedding reinforcing bars in the floor slab and using grouting connection, the stair column 3 can be effectively fixed to the floor slab as if it were cast in situ.

[0037] At the lower end of each precast staircase 1, there are two longitudinally arranged and spaced-apart channels 11. In the precast landing 4 (located at the transverse end of the L-shaped beam 42) and the lower staircase beam connected to the lower end of the precast staircase 1, anchor bolts 45 corresponding to the channels 11 are embedded. The anchor bolts 45 are inserted into the channels 11 for connection. The diameter of the channel 11 is larger at the top and smaller at the bottom, divided into a large-mouth channel and a small-mouth channel. When connecting, the bottom of the large-mouth channel is blocked by an anchor bolt fastener 14. Grouting material is poured into the large-mouth channel, and the grouting material is firmly coagulated with the upper part of the anchor bolt 45 to form a whole, so that the small-mouth channel remains a cavity and can move back and forth appropriately under the action of an earthquake. The main principle is that the grouting connection end is a weak position. When an earthquake occurs, this position is damaged first, so that the anchor bolt 45 is restricted to move within the range of the channel 11, reducing the damage to the staircase structure caused by the earthquake.

[0038] The anchor bolt fastener 14 includes a gasket 141 for blocking the large-mouth channel and a nut 142 matching the anchor bolt.

[0039] In the precast staircase 1, there are also embedded lifting bars (not shown) for lifting after production.

[0040] This fully precast combined staircase has the following characteristics:

[0041] 1. The precast staircase beam 2 is an L-shaped beam and is connected to the main beam by a bull nose plate.

[0042] 2. The landing 4 is integrally precast and formed.

[0043] 3. The precast staircase 1, the precast landing 4, and the precast staircase beam 2 are all connected by grouting of steel bars.

[0044] 4. The precast column top 3 is provided with a groove 31 to enhance the shear resistance of the joint after grouting in the groove hole 31.

[0045] 5. The four precast staircase columns 3 are produced using the same mold. The cross-sectional height of the precast staircase column 3 is the beam width of the L-shaped beam 42, and the cross-sectional width of the precast staircase column 3 is the beam width of the rectangular beam 43.

[0046] 6. The connection method between the precast staircase column 3 and the precast landing 4 is as follows: At the top of the precast staircase column 3, embedded shear-resistant steel bars 33 are extended. The groove hole 44 of the precast landing is aligned with the steel bars 33 to ensure that the steel bars 33 are inserted into the groove hole 44; the groove hole 44 is grouted.

[0047] 7. The connection method between the precast staircase beam 2 and the upper end of the precast staircase 1 is as follows: The precast staircase beam 2 extends and embeds anchor bolts 21. The groove hole 12 of the precast staircase 1 is aligned with the embedded anchor bolts 21 to ensure that the embedded anchor bolts 21 are inserted into the groove hole 12; the groove hole 12 is grouted, as Figure 4 shown.

[0048] 8. The connection method between the precast landing 4 and the upper end of the precast staircase 1 is as follows: the precast landing 4 extends out the embedded anchor bolts 45, and the slot holes 13 of the precast staircase are aligned with the embedded anchor bolts 45 to ensure that the embedded anchor bolts 45 are inserted into the slot holes 13; grout the slot holes 13, as Figure 4 shown.

[0049] 9. The connection method at the lower end of the precast staircase is as follows: the lower beam (not shown) and the precast landing 4 extend out the embedded anchor bolts 45, and the hole 11 at the lower end of the precast staircase 1 is aligned with the embedded anchor bolts 45 to ensure that the embedded anchor bolts 45 are inserted into the hole 11. The hole 11 has a large and a small opening and is sealed with a fastener 14; grout the hole 11 to form a partial grout connection, as Figure 5 shown.

[0050] 10. The precast column 3 and the floor slab (not shown) are connected by sleeves, and a 15-mm mortar bedding is reserved at the bottom.

[0051] Although the specific embodiments of the present invention have been described above, those skilled in the art of this technology should understand that the specific embodiments we described are illustrative rather than used to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be covered by the scope protected by the claims of the present invention.

Claims

1. A fully prefabricated combined staircase, Features: It comprises a prefabricated staircase, a prefabricated stair beam, a prefabricated resting platform and a prefabricated stair column for supporting the prefabricated resting platform, wherein the prefabricated stair beam and the prefabricated staircase, the prefabricated staircase and the prefabricated resting platform, and the prefabricated resting platform and the prefabricated stair column are all connected by steel bar grouting; The connection between the prefabricated ladder beam and the prefabricated staircase, and between the prefabricated staircase and the prefabricated rest platform are both undertaken by an L-shaped structure; The prefabricated rest platform comprises an integrally formed platform plate, an L-shaped beam, and a rectangular beam. The L-shaped beam and the rectangular beam are respectively arranged on both sides of the platform plate and are provided with slots for inserting the prefabricated staircase columns. The horizontal end of the L-shaped beam is longitudinally pre-embedded with a plurality of anchor bolts for connecting the prefabricated stairs. A groove is arranged at the center of the top of the prefabricated ladder column, and steel bars corresponding to the slot holes are pre-embedded in the prefabricated ladder column, so that the steel bars are inserted into the slot holes for connection; The prefabricated stair column is connected to the lower floor slab through a plurality of grouting sleeves preset inside the lower section of the prefabricated stair column; the lower end of the prefabricated staircase is provided with a channel corresponding to the anchor bolt pre-buried in its connecting structure; the diameter of the channel is larger at the top and smaller at the bottom, and is divided into a large-mouth channel and a small-mouth channel. When connected, the bottom of the large-mouth channel is sealed by an anchor bolt fastener, and grouting material is poured into the large-mouth channel, and the grouting material is fastened and solidified to the upper part of the anchor bolt as a whole.

2. The fully prefabricated composite staircase according to claim 1, Features: The cross-sectional height of the prefabricated ladder column is equal to the beam width of the L-shaped beam, and the cross-sectional width of the prefabricated ladder column is the beam width of the rectangular beam.

3. The fully prefabricated composite staircase according to claim 1, Features: The number of the prefabricated stairs is two.

4. The fully prefabricated composite staircase according to claim 1, Features: The anchor bolt fastener comprises a gasket for blocking the large-mouthed channel and a nut matching the anchor bolt.

5. The fully prefabricated composite staircase according to claim 1, Features: The length of the large-mouth channel is smaller than the length of the small-mouth channel.

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