CN212129721U

CN212129721U - Fully-prefabricated combined stair

Info

Publication number: CN212129721U
Application number: CN201922358410.4U
Authority: CN
Inventors: 郑国涛; 洪晓晖; 任彧; 池思源
Original assignee: Fujian Jiangong Group Co ltd
Current assignee: Fujian Jiangong Group Co ltd
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2020-12-11
Anticipated expiration: 2029-12-25

Abstract

The utility model belongs to the assembly type structure field, more specifically relates to a prefabricated combination stair entirely. Including prefabricated staircase, prefabricated ladder beam, prefabricated half space and be used for supporting prefabricated half space's prefabricated halfpace, prefabricated ladder beam with prefabricated staircase prefabricated half space with prefabricated half space with all connect through the reinforcing bar grout between the prefabricated halfpace. The utility model discloses a ladder post, ladder roof beam, the whole prefabrications that adopt of rest platform board make whole stair all adopt the assembled construction, have avoided half to use cast-in-place technology, half to use the awkward condition of prefabricated technology, promote engineering construction speed and quality to reduce the cost.

Description

Fully-prefabricated combined stair

Technical Field

The utility model belongs to the assembly type structure field, more specifically relates to a prefabricated combination stair entirely.

Background

In recent years, the modernization of assembly type buildings and industries is rapidly developed in China. The national institute is discharged as the guide opinion about the vigorous development of the assembly type building, so that the green building and the building material are further definitely and actively popularized in the future, and the assembly type building accounts for 30 percent of the newly built building in about 10 years.

The existing assembled concrete building stairs usually adopt cast-in-place ladder posts, ladder beams and rest platforms. Only the stair sections adopt prefabricated stairs, cast-in-place embedded size and position deviation are inevitable, and later-stage stair installation is difficult and even impossible.

Meanwhile, the rest platform and the ladder beam and ladder column need to be independently poured in advance by adopting a wood formwork, so that the construction period is inevitably influenced and resources are wasted.

Disclosure of Invention

The to-be-solved technical problem of the utility model lies in providing a complete prefabricated combination stair promotes engineering construction speed and quality to reduce the cost.

The utility model discloses a realize like this:

the utility model provides a full prefabricated combination stair, includes prefabricated stair, prefabricated ladder beam, prefabricated half space and is used for supporting prefabricated half space's prefabricated ladder post, prefabricated ladder beam with prefabricated stair prefabricated half space with prefabricated half space with all connect through the reinforcing bar grout between the prefabricated ladder post.

The prefabricated ladder beam with prefabricated staircase with the connection between the prefabricated half space all adopts L type structure to accept.

Prefabricated half space includes integrated into one piece's landing slab, L type roof beam, rectangular beam, L type roof beam the rectangular beam sets up respectively the landing slab both sides, and all are equipped with and are used for pegging graft the slotted hole of prefabricated halfpace, the vertical pre-buried a plurality of in horizontal end of L type roof beam is used for connecting prefabricated staircase's crab-bolt.

The prefabricated ladder post is characterized in that a groove is formed in the center of the top of the prefabricated ladder post, and reinforcing steel bars corresponding to the groove holes are pre-embedded in the prefabricated ladder post, so that the reinforcing steel bars are inserted into the groove holes to be connected.

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

The number of the prefabricated ladder posts is four.

The number of the prefabricated staircase is at least two.

The prefabricated ladder post is connected with the floor slab through a plurality of grouting sleeves which are arranged inside the lower section of the prefabricated ladder post in a preset mode.

The lower end of the prefabricated staircase is provided with a pore channel corresponding to an anchor bolt embedded in the connecting structure of the prefabricated staircase; the diameter of the pore canal is big-end-up, and is divided into a big-mouth pore canal and a small-mouth pore canal, the bottom of the big-mouth pore canal is plugged by an anchor bolt fastener during connection, grouting material is poured into the big-mouth pore canal, and the grouting material and the upper part of the anchor bolt are fastened and condensed into a whole.

The anchor bolt fastener is including being used for the shutoff the gasket of wide-mouthed pore way, and with anchor bolt assorted nut.

The length of the large-opening pore canal is less than that of the small-opening pore canal.

"several" in this application refers to two or more.

"steel bar grout is connected" in this application indicates to insert the through-hole with the reinforcing bar, then grout to the through-hole, makes grout material and reinforcing bar fastening condense as an organic whole, forms connection structure.

The utility model has the advantages that:

1. the original stair only with prefabricated bench boards is changed into the ladder post, the ladder beam and the rest platform board are all prefabricated, so that the whole stair is constructed in an assembly mode, and the embarrassing situation that half of the stair uses a cast-in-place process and half of the stair uses a prefabricated process is avoided.

2. The original rest platform beam slab is integrated and prefabricated, the hoisting times are reduced, the mold sealing and cast-in-place operation of the superposed members is reduced, and the construction efficiency is improved.

3. The rest platform and the prefabricated ladder column are connected through steel bars and grouting, the number of beam column node mold sealing and cast-in-place operation is reduced, and the construction efficiency is improved.

Drawings

The invention will be further described with reference to the following examples with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of a prefabricated rest platform.

Fig. 3 is a side view of fig. 2.

Fig. 4 is a connection structure diagram of the upper end of the prefabricated staircase and the prefabricated rest platform or the prefabricated ladder beam.

Fig. 5 is a connection structure view of the lower end of the prefabricated staircase.

Detailed Description

Example 1

Because the stairs of the existing fabricated concrete building are usually cast in situ by ladder posts, ladder beams and rest platforms. Only the stair sections adopt prefabricated stairs, cast-in-place embedded size and position deviation are inevitable, and later-stage stair installation is difficult and even impossible. The utility model provides a full prefabricated combination stair, as shown in figure 1. The utility model discloses a full prefabricated combination stair, including prefabricated stair 1, prefabricated ladder beam 2, prefabricated ladder post 3 and prefabricated half space 4.

As shown in fig. 2 and 3, the prefabricated rest platform 4 comprises a platform plate 41, an L-shaped beam 42 and a rectangular beam 43 which are integrally formed, wherein the L-shaped beam 42 and the rectangular beam 43 are respectively arranged on two sides of the platform plate 41, and are both provided with a slot hole 44 for connecting the prefabricated ladder post 3.

The center of the top of the prefabricated ladder post 3 is provided with a groove 31 which plays a role in connection and leveling. Because the ladder post is prefabricated, there may be the error in the size, and the uneven atress that causes in surface can be avoided in the design of recess 31, makes the later stage grout connect the back wholeness better. Reinforcing steel bars 33 corresponding to the slotted holes 44 are pre-embedded in the prefabricated ladder posts 3, so that the reinforcing steel bars 33 are inserted into the slotted holes 44 for connection

The number of the prefabricated ladder posts 3 is four.

The number of the prefabricated staircases 1 is two, and a dual-run staircase is formed.

The prefabricated ladder posts 3 are connected with the lower floor slab through a plurality of grouting sleeves 32 which are arranged at the bottoms of the prefabricated ladder posts 3 in a preset mode. Reinforcing steel bars are embedded in the floor slab, grouting connection is adopted, and the ladder posts 3 and the floor slab can be effectively and fixedly connected as cast-in-place.

The lower end of each prefabricated staircase 1 is provided with two longitudinal holes 11 which are arranged at intervals, and anchor bolts 45 corresponding to the holes 11 are embedded in the prefabricated rest platform 4 (positioned at the transverse end of the L-shaped beam 42) and the lower ladder beam which are connected with the lower end of the prefabricated staircase 1, so that the anchor bolts 45 are inserted into the holes 11 for connection. The diameter of the pore canal 11 is big-end-up and small-end, and is divided into a big-end pore canal and a small-end pore canal, the bottom of the big-end pore canal is sealed by the anchor bolt fastener 14 during connection, grouting material is poured into the big-end pore canal, and the grouting material and the upper part of the anchor bolt 45 are fastened and condensed into a whole, so that the small-end pore canal is still a cavity and can move forwards and backwards properly under the action of an earthquake. The main principle is that the grout link is weak position, and this position destroys earlier when the earthquake for crab-bolt 45 limits and moves in the within range of pore 11, reduces the earthquake to stair structure's destruction.

The anchor bolt fastener 14 includes a washer 141 for sealing the wide bore hole and a nut 142 for mating with the anchor bolt.

And hanging ribs (not shown) are also embedded in the prefabricated staircase 1 for hoisting after production.

The fully prefabricated combined stair has the following characteristics:

1. the prefabricated ladder beam 2 is an L-shaped beam and is connected with the main beam by a cattle arm plate;

2. the rest platform 4 is integrally prefabricated and molded;

3. the prefabricated staircase 1 is connected with the prefabricated rest platform 4 and the prefabricated ladder beam 2 through steel bar grouting;

4. the prefabricated column top 3 is provided with a groove 31, so that the shear bearing capacity of the joint after the slot 31 is grouted is enhanced;

5. the four prefabricated ladder posts 3 are produced by the same die, the height of the cross section of each prefabricated ladder post 3 is the width of the L-shaped beam 42, and the width of the cross section of each prefabricated ladder post 3 is the width of the rectangular beam 43.

6. The connection mode of prefabricated halfpace 3 and prefabricated rest platform 4 is: the top of the prefabricated ladder post 3 extends out of the embedded shear steel bar 33, the prefabricated rest platform slot 44 is aligned with the steel bar 33, and the steel bar 33 is ensured to be inserted into the slot 44; the slot 44 is grouted.

7. The connection mode of prefabricated ladder beam 2 and prefabricated staircase 1 upper end is: the prefabricated ladder beam 2 extends out of the embedded anchor bolt 21, the slotted hole 12 of the prefabricated staircase 1 is aligned with the embedded anchor bolt 21, and the embedded anchor bolt 21 is ensured to be inserted into the slotted hole 12; the slot 12 is grouted as shown in fig. 4.

8. The connection mode of prefabricated half space 4 and prefabricated stair 1 upper end does: the prefabricated rest platform 4 extends out of the embedded anchor 45, the slotted hole 13 of the prefabricated staircase is aligned with the embedded anchor 45, and the embedded anchor 45 is ensured to be inserted into the slotted hole 13; the slot 13 is grouted as shown in fig. 4.

9. The connection mode of prefabricated staircase lower extreme does: the lower ladder beam (not shown) and the prefabricated rest platform 4 extend out of the embedded anchor 45, the hole channel 11 at the lower end of the prefabricated staircase 1 is aligned with the embedded anchor 45, the embedded anchor 45 is ensured to be inserted into the hole channel 11, the hole channel 11 is a big hole and a small hole, and the hole channel is blocked by a fastening piece 14; the tunnel 11 is grouted to form a partially grouted connection as shown in figure 5.

10. The prefabricated ladder posts 3 are connected with a floor (not shown) through sleeves, and 15mm of setting grout is reserved at the bottom.

Although specific embodiments of the present invention have been described, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the claims appended hereto.

Claims

1. The utility model provides a full prefabricated combination stair which characterized in that: including prefabricated staircase, prefabricated ladder beam, prefabricated half space and be used for supporting prefabricated half space's prefabricated halfpace, prefabricated ladder beam with prefabricated staircase prefabricated half space with prefabricated half space with all connect through the reinforcing bar grout between the prefabricated halfpace.

2. The fully prefabricated assembled staircase of claim 1, wherein: the prefabricated ladder beam with prefabricated staircase with the connection between the prefabricated half space all adopts L type structure to accept.

3. The fully prefabricated assembled staircase of claim 1, wherein: prefabricated half space includes integrated into one piece's landing slab, L type roof beam, rectangular beam, L type roof beam the rectangular beam sets up respectively the landing slab both sides, and all are equipped with and are used for pegging graft the slotted hole of prefabricated halfpace, the vertical pre-buried a plurality of in horizontal end of L type roof beam is used for connecting prefabricated staircase's crab-bolt.

4. The fully prefabricated assembled staircase of claim 3, wherein: the prefabricated ladder post is characterized in that a groove is formed in the center of the top of the prefabricated ladder post, and reinforcing steel bars corresponding to the groove holes are pre-embedded in the prefabricated ladder post, so that the reinforcing steel bars are inserted into the groove holes to be connected.

5. The fully prefabricated assembled staircase of claim 3, wherein: the height of the cross section of the prefabricated ladder column is equal to the beam width of the L-shaped beam, and the width of the cross section of the prefabricated ladder column is the beam width of the rectangular beam.

6. The fully prefabricated assembled staircase of claim 1, wherein: the number of the prefabricated stairs is two.

7. The fully prefabricated assembled staircase of claim 1, wherein: the prefabricated ladder post is connected with the lower floor through a plurality of grouting sleeves which are preset inside the lower section of the prefabricated ladder post.

8. The fully prefabricated assembled staircase of claim 1, wherein: the lower end of the prefabricated staircase is provided with a pore channel corresponding to an anchor bolt embedded in the connecting structure of the prefabricated staircase; the diameter of the pore canal is big-end-up, and is divided into a big-mouth pore canal and a small-mouth pore canal, the bottom of the big-mouth pore canal is plugged by an anchor bolt fastener during connection, grouting material is poured into the big-mouth pore canal, and the grouting material and the upper part of the anchor bolt are fastened and condensed into a whole.

9. The fully prefabricated assembled staircase of claim 8, wherein: the anchor bolt fastener is including being used for the shutoff the gasket of wide-mouthed pore way, and with anchor bolt assorted nut.

10. The fully prefabricated assembled staircase of claim 8, wherein: the length of the large-opening pore canal is less than that of the small-opening pore canal.