CN211622348U

CN211622348U - Concrete prefabricated staircase

Info

Publication number: CN211622348U
Application number: CN202020124069.6U
Authority: CN
Inventors: 梁俊平; 师穗莹; 林杰聪
Original assignee: Guangzhou Zhongyue Municipal Garden Design Engineering Co ltd
Current assignee: Guangzhou Zhongyue Municipal Garden Design Engineering Co ltd
Priority date: 2020-01-18
Filing date: 2020-01-18
Publication date: 2020-10-02
Anticipated expiration: 2030-01-18

Abstract

The utility model relates to a precast concrete stair, it includes the flier, a plurality of even shaping is in the ladder and two mount pads that set up respectively at flier length direction both ends of the flier upside of flier, a plurality of locating hole is seted up with the parallel one side level of flier length direction to the flier, the locating hole distributes along flier length direction, the flaring of a plurality of with adjacent locating hole intercommunication respectively is seted up to the one side level that the locating hole was seted up to the flier, the flaring is located adjacent locating hole below, the flaring extends along locating hole length direction, one side and the flier downside intercommunication of locating hole are kept away from to the flaring, flaring downside opening is toward keeping away from the expansion of locating hole direction. The utility model discloses have the effect of being convenient for location.

Description

Concrete prefabricated staircase

Technical Field

The utility model belongs to the technical field of building element's technique and specifically relates to a precast concrete stair is related to.

Background

At present, the stair is an important component for vertical traffic between floors in a building, the preparation method of the stair mainly comprises a cast-in-place mode and a prefabricated mode, the cast-in-place stair can give full play to the plasticity of reinforced concrete, the structural integrity is good, the application range is wide, but the stair has the defects of difficult formwork support, complex construction process, long construction period and the like. In order to solve the problems of difficulty in formwork erecting and long construction period of the traditional cast-in-place stair, people prepare the prefabricated stair. The prefabricated staircase is manufactured firstly and then transported to a construction site for installation, and the installation platforms at the two ends of the prefabricated staircase in the length direction are respectively fixed on the upper-layer cross beam and the lower-layer cross beam, so that the prefabricated staircase has the advantages of simple construction, low cost, short construction period and the like.

The utility model discloses a current utility model patent that the bulletin number of authorizing is CN2018209837053 discloses a precast concrete stair, the mount table at ladder and shaping and the step plate length direction both ends of marking time including a plurality of even shaping and step plate upside, step plate width direction's a side level is provided with at least two sets of locating holes, run through perpendicularly on the mount table and set up the prefabricated bolt hole, the locating hole is arranged in with the adjacent wall body of cooperation pre-buried steel pipe, thereby realize the first effect of relocating of precast stair, the prefabricated bolt hole is used for cooperating the adjacent platform roof beam of bolted connection, thereby realize the effect to the second relocation of precast stair, and then reach the accurate positioning of precast stair, the installation progress of precast stair has been improved.

The above prior art solutions have the following drawbacks: because prefabricated staircase adopts the installation of dress formula of hanging, in the installation, prefabricated staircase rocks easily when carrying out horizontal migration and controlling the position of adjustment locating hole according to pre-buried steel pipe position condition, and simultaneously, pre-buried steel pipe makes prefabricated staircase positioning accuracy's requirement high with the locating hole grafting mode, and the degree of difficulty that makes the tip of the locating hole of more than two sets of alignment corresponding pre-buried steel pipe simultaneously is big to the location of prefabricated staircase of not being convenient for, consequently still has the space of improving.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, one of the purposes of the utility model is to provide a precast concrete stair convenient to location.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

the utility model provides a precast concrete stair, including step board, a plurality of even shaping in the installation platform at step board length direction both ends is set up respectively to the ladder and two of step board upside, a plurality of locating hole is seted up with the parallel one side level of step board length direction to the step board, the locating hole distributes along step board length direction, the flaring of a plurality of respectively with adjacent locating hole intercommunication is seted up to the one side level that the locating hole was seted up to the step board, the flaring is located adjacent locating hole below, the flaring extends along locating hole length direction, one side and the step board downside intercommunication of locating hole are kept away from to the flaring, flaring downside opening is toward keeping away from the locating hole direction expansion.

Through adopting above-mentioned technical scheme, set up through the flaring, and make flaring and locating hole and step board downside intercommunication, thereby make the mounting means change into the hanging installation of going up down, make pre-buried steel pipe at adjacent wall body get into in the locating hole through the flaring, and simultaneously, because flaring downside opening expands toward keeping away from the locating hole direction, and then improved the fault-tolerant rate that locating hole and steel pipe were aimed at, make and transfer in-process steel pipe flaring lateral wall along getting into in the locating hole at prefabricated staircase, be convenient for the alignment of steel pipe and locating hole, be favorable to having reduced the installation degree of difficulty.

The present invention may be further configured in a preferred embodiment as: the upper end face of the step ladder is vertically provided with a grouting hole communicated with an adjacent positioning hole, two side walls of the flaring are respectively and horizontally provided with a connecting groove with two open ends, a stopper for closing the lower opening of the positioning hole is arranged in the flaring, and two sides of the stopper parallel to the length direction of the stopper are respectively inserted with the adjacent connecting grooves.

By adopting the technical scheme, the blocking piece for closing the lower side opening of the positioning hole is arranged in the flaring and is spliced with the connecting grooves on two sides, so that slurry can be poured into the grouting hole communicated with the positioning hole, the blocking piece blocks the slurry flowing to the flaring, and the slurry is favorably formed in the positioning hole, so that the prefabricated staircase and the steel pipe are favorably fixed.

The present invention may be further configured in a preferred embodiment as: the connecting grooves are T-shaped grooves, the openings of the two connecting grooves far away from the bottom walls of the adjacent connecting grooves are opposite to each other, the blocking piece is I-shaped steel horizontally arranged, the I-shaped steel comprises a web plate for sealing the positioning holes and two flanges fixed on two sides of the web plate, and the flanges are respectively spliced with the adjacent connecting grooves.

By adopting the technical scheme, the connecting grooves are arranged to be the T-shaped grooves and are connected with the flange of the I-shaped steel in an inserting mode, the occurrence of the condition that the I-shaped steel is separated from the connecting grooves is reduced, and based on the advantages of light weight and strong bearing capacity of the I-shaped steel, the installation worker can conveniently install the connecting grooves on the premise that the mud bearing capacity of the blocking piece is improved.

The present invention may be further configured in a preferred embodiment as: and the joint between the flaring and the adjacent positioning hole is in smooth transition.

Through adopting above-mentioned technical scheme to collision with flaring upside open-ended edges and corners and the impaired condition of messenger's prefabricated stair when having reduced the steel pipe and having slided into the locating hole is favorable to going on of prefabricated stair installation work.

The present invention may be further configured in a preferred embodiment as: the mounting table is characterized in that a connecting seat is arranged on the lower end face of the mounting table, a circular truncated cone bulge is arranged on one side, facing the adjacent mounting table, of the connecting seat, the peripheral face of the circular truncated cone bulge is closed in the direction away from the connecting seat, and a circular truncated cone groove matched with the circular truncated cone bulge in the direction is formed in the lower end face of the mounting table.

By adopting the technical scheme, the connecting seats can be respectively fixed on the upper-layer cross beam and the lower-layer cross beam in advance, when the prefabricated staircase is placed below, the connection between the circular truncated cone protrusions and the circular truncated cone grooves further positions the prefabricated staircase, and the peripheral surfaces of the circular truncated cone protrusions are concentrated from bottom to top, so that the ends, away from the connecting seats, of the circular truncated cone protrusions are narrowed, the alignment difficulty of the circular truncated cone protrusions and the circular truncated cone grooves is reduced, and the prefabricated staircase is convenient to further position.

The present invention may be further configured in a preferred embodiment as: the upper end face of the step ladder is provided with a plurality of anti-skid convex strips which are parallel to each other.

Through adopting above-mentioned technical scheme, through the setting of antiskid sand grip for the ladder of marking time possesses anti-skidding function, reduces the probability that the user slided to.

The present invention may be further configured in a preferred embodiment as: the mounting table is characterized in that a strip hole is formed in the upper end face of the mounting table, and a connecting rod is arranged between two opposite sides of the strip hole.

Through adopting above-mentioned technical scheme for the hoist can stretch into rectangular downthehole and with the connecting rod hookup, thereby be convenient for load and hang implementation of operation.

The present invention may be further configured in a preferred embodiment as: mounting holes are formed in the upper end face of the mounting table and the upper end face of the stepping ladder, and the mounting holes are far away from one side, provided with positioning holes, of the stepping plate.

By adopting the technical scheme, the installation point for installing the stair railing upright post is preset by the prefabricated stair through the installation of the installation hole, so that the hole opening operation during installation of the stair railing is reduced, and the subsequent installation operation of the stair railing is facilitated.

To sum up, the utility model discloses a following at least one useful technological effect:

1. the upper side and the lower side of the flaring are respectively communicated with the positioning hole and the opening at the lower side of the step plate, so that the prefabricated staircase can be installed from top to bottom, and meanwhile, the fault tolerance rate of the alignment of the positioning hole and the steel pipe is increased due to the arrangement of the flaring, so that the prefabricated staircase is convenient to position;

2. the stop piece is used for sealing the positioning hole, the stop piece is connected with the connecting groove in the flaring in an inserting mode, and meanwhile the grouting hole is communicated with the positioning hole, so that slurry injected from the grouting hole can be formed in the positioning hole, and the prefabricated staircase and the steel pipe can be fixed conveniently.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is an exploded view of the middle stopper, the step plate and the connecting seat of the present invention.

Fig. 3 is a partially enlarged schematic view of a portion a in fig. 2.

FIG. 4 is an exploded view of the middle step plate and the connecting seat of the present invention

In the figure, 1, a step plate; 11. positioning holes; 12. flaring; 13. connecting grooves; 2. stepping stairs; 21. grouting holes; 22. mounting holes; 23. anti-skid convex strips; 3. an installation table; 31. a strip hole; 32. a connecting rod; 33. a countersunk hole; 34. a circular truncated cone groove; 4. a connecting seat; 41. the circular truncated cone is protruded; 5. a wall body; 51. a steel pipe; 6. i-shaped steel; 61. a web; 62. and (4) flanges.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, for the utility model discloses a precast concrete stair, including step board 1, a plurality of even shaping in the ladder 2 and two blocks of marking time of 1 upside of step board pour the shaping respectively in mount table 3 at step board 1 length direction both ends, mount table 3 is the level setting, and the ladder 2 of marking time distributes along step board 1 length direction. A wall body 5 is arranged on one side of the tread plate 1 parallel to the length direction of the tread plate. Three steel pipes 51 are embedded in one side of the wall body 5 facing the step plate 1, and the steel pipes 51 are perpendicular to the wall body 5. The steel pipes 51 are provided at equal intervals along the longitudinal direction of the step plate 1. The side of the step plate 1 facing the wall 5 is provided with three positioning holes 11 along the width direction of the step plate 1, and the positioning holes 11 are matched with the steel pipes 51. The length of the positioning hole 11 is larger than that of the steel pipe 51. The positioning holes 11 are equally spaced along the length of the tread plate 1, and the distance between adjacent positioning holes 11 is equal to the distance between adjacent steel pipes 51. One side of the step plate 1 provided with the positioning hole 11 is penetrated with three flaring holes 12 respectively below the positioning hole 11 along the length direction of the step plate 1, the flaring holes 12 are communicated with the adjacent positioning holes 11, one side of the flaring holes 12 far away from the adjacent positioning holes 11 is communicated with the lower side of the step plate 1, and the lower side opening of the flaring holes 12 is expanded towards the direction far away from the positioning holes 11. The joints between the flaring 12 and the adjacent positioning holes 11 are in smooth transition.

Referring to fig. 2 and 3, the upper end surface of the step 2 is vertically provided with three grouting holes 21 respectively communicated with adjacent positioning holes 11, two side walls of the flared opening 12 are respectively horizontally provided with connecting grooves 13 with two open ends, a stopper for closing the lower side opening of the positioning hole 11 is installed in the flared opening 12, and two sides of the stopper parallel to the length direction of the stopper are respectively inserted into the adjacent connecting grooves 13. The connecting grooves 13 are T-shaped grooves, the openings of the two connecting grooves 13 far away from the bottom walls of the adjacent connecting grooves 13 are arranged opposite to each other, the blocking piece is a horizontally arranged I-shaped steel 6, the I-shaped steel 6 comprises a web 61 for sealing the positioning hole 11 and two flanges 62 fixed on the two sides of the web 61, and the flanges 62 and the web 61 are arranged perpendicular to each other. The flanges 62 are respectively inserted into the adjacent connecting grooves 13. The length of the working steel is equal to the length of the connecting groove 13.

Referring to fig. 2, the upper end surface of the installation platform 3 and the upper end surface of the step ladder 2 are provided with installation holes 22 for inserting the handrail columns of the stair, and the installation holes 22 are arranged far away from the wall 5. The upper end surface of the mounting platform 3 and the upper end surface of the stepping ladder 2 are respectively fixed with a plurality of anti-skid convex strips 23 which are parallel to each other and are arranged side by side. The antiskid ridges 23 are parallel to the width direction of the tread plate 1. The upper end surface of the mounting platform 3 is provided with a long hole 31 parallel to the width direction of the step plate 1, and the long hole 31 is positioned in the middle of the upper end surface of the mounting platform 3. A connecting rod 32 which is horizontally arranged is fixed between the long hole 31 and two sides which are vertical to the width direction of the step plate 1, and the connecting rod 32 can be used for hooking and matching a lifting appliance.

Referring to fig. 2 and 4, the lower end surface of the mounting table 3 is provided with connecting seats 4, and the two connecting seats 4 are fixed on the upper-layer cross beam and the lower-layer cross beam in advance. The middle part of one side of the connecting seat 4 facing the adjacent mounting table 3 is fixed with a circular truncated cone bulge 41, the peripheral surface of the circular truncated cone bulge 41 is closed towards the direction far away from the connecting seat 4, and the lower end surface of the mounting table 3 is provided with a circular truncated cone groove 34 matched with the circular truncated cone bulge 41. Two countersunk holes 33 located on two sides of the strip hole 31 are formed in the upper end face of the mounting table 3, the connecting seat 4 and the mounting table 3 are fixed through bolts, and the countersunk holes 33 accommodate bolt heads.

The implementation principle of the embodiment is as follows: when the prefabricated staircase is installed, the connecting seats 4 are firstly fixed on the upper layer cross beam and the lower layer cross beam in advance, then the prefabricated staircase is hooked by the connecting rods 32 in the strip holes 31 by the lifting appliance and is lifted, the prefabricated staircase is lifted to the position above the steel pipe 51 and the flaring 12 is aligned to the steel pipe 51, then vertically lowering the prefabricated staircase to enable the steel pipe 51 to pass through the flaring 12 and slide into the positioning hole 11, meanwhile, aligning the circular truncated cone grooves 34 with the circular truncated cone protrusions 41 and mutually embedding, thereby completing the positioning operation, facilitating the operator to position the prefabricated staircase, reducing the installation difficulty, then the flanges 62 at the two sides of the I-steel 6 are inserted into the connecting groove 13, so that the end part of the I-steel 6 is abutted against the wall body 5, then the mounting table 3 and the connecting seat 4 are locked through bolts, finally, slurry is poured into the slurry injection hole 21, after the slurry is formed, the installation work of the whole concrete prefabricated staircase is completed, so that the whole installation work is simple, convenient and easy to implement.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a precast concrete stair, including flier (1), a plurality of even shaping in step ladder (2) and two blocks of marking time of flier (1) upside set up mount table (3) at flier (1) length direction both ends respectively, its characterized in that: step board (1) is seted up a plurality of locating hole (11) with the parallel one side level of step board (1) length direction, locating hole (11) distribute along step board (1) length direction, step board (1) is seted up one side level of locating hole (11) and is seted up flaring (12) that a plurality of communicates with adjacent locating hole (11) respectively, flaring (12) are located adjacent locating hole (11) below, flaring (12) extend along locating hole (11) length direction, one side and step board (1) downside intercommunication that locating hole (11) were kept away from in flaring (12), flaring (12) downside opening is toward keeping away from locating hole (11) direction expansion.

2. The precast concrete stair of claim 1, wherein: the upper end face of the step ladder (2) is vertically provided with a grouting hole (21) communicated with an adjacent positioning hole (11), two side walls of the flaring (12) are respectively and horizontally provided with a connecting groove (13) with two open ends, a stopper for closing the lower side opening of the positioning hole (11) is arranged in the flaring (12), and two sides of the stopper parallel to the length direction of the stopper are respectively spliced with the adjacent connecting grooves (13).

3. The precast concrete stair of claim 2, wherein: the connecting grooves (13) are T-shaped grooves, the two connecting grooves (13) are arranged opposite to each other in the opening far away from the bottom wall of the adjacent connecting groove (13), the blocking piece is I-shaped steel (6) horizontally arranged, the I-shaped steel (6) comprises a web plate (61) for sealing the positioning hole (11) and two flange edges (62) fixed to two sides of the web plate (61), and the flange edges (62) are respectively connected with the adjacent connecting grooves (13) in an inserting mode.

4. The precast concrete stair of claim 1, wherein: the joints between the flaring (12) and the adjacent positioning holes (11) are in smooth transition.

5. The precast concrete stair of claim 1, wherein: the end surface is provided with connecting seat (4) under mount pad (3), connecting seat (4) are provided with round platform arch (41) towards one side of adjacent mount pad (3), round platform arch (41) outer peripheral face is toward keeping away from connecting seat (4) direction and drawing close, end surface is opened down under mount pad (3) has and is protruding (41) to round platform recess (34) of adaptation with the round platform.

6. The precast concrete stair of claim 1, wherein: the upper end surface of the step ladder (2) is provided with a plurality of mutually parallel anti-skid convex strips (23).

7. The precast concrete stair of claim 1, wherein: the mounting table (3) upper end face is opened has rectangular hole (31), wherein be provided with connecting rod (32) between the both sides that rectangular hole (31) is just right.

8. The precast concrete stair of claim 1, wherein: mounting table (3) up end and step ladder (2) up end open and have mounting hole (22), one side setting that locating hole (11) were equipped with in footboard (1) is kept away from in mounting hole (22).