Light stair prefabricated part and stair pouring system

Abstract

The utility model relates to a light stair prefabricated part and a stair pouring system. A reinforcing mesh is pre-embedded in the bottom plate prefabricated part, an upper limiting plate is arranged at the upper end of the bottom plate prefabricated part, an upper lap joint block is arranged on the upper limiting plate, lap joint steel bars are further arranged on the upper limiting plate, a lower limiting plate is arranged at the lower end of the bottom plate prefabricated part, a lower lap joint block is arranged on the lower limiting plate, and lap joint steel bars are also arranged on the lower limiting plate. A plurality of positioning steel bars extend out of the two sides of the bottom plate prefabricated part; the two side plate prefabricated parts are fixed to the two side faces of the bottom plate prefabricated part, a plurality of positioning holes are formed in the lower edges of the side plate prefabricated parts, and the positioning steel bars are located in the positioning holes; and a step prefabricated member. The stair prefabricated part is assembled on site, the size of the assembly is smaller, the interior of the assembled stair prefabricated part is of a hollow structure, the weight of the stair prefabricated part is much lighter than that of an existing finished stair prefabricated part, the stair prefabricated part can be hoisted through small hoisting equipment, and therefore the stair prefabricated part is low in requirement for construction site conditions and can be suitable for most construction sites.

Description

Technical Field

[0001] The utility model relates to a precast staircase component, in particular to a lightweight precast staircase component and a staircase pouring system. Background Art

[0002] Staircases are equipped in various buildings. According to materials, staircases are divided into cement staircases, wooden staircases and metal staircases, among which cement staircases are the most widely used. Cement staircases are generally formed by in-situ casting of cement. The in-situ casting process of cement requires molds to construct the shape of the staircase. The shape of the staircase is much more complex than that of the wall, so the construction is relatively cumbersome.

[0003] To solve the problem of cumbersome construction, precast staircase components came into being. The precast staircase components transfer the staircase molds that originally needed to be built on site to the factory. The factory customizes the molds in advance according to the construction drawings, then pours them in large quantities, and then transports the solidified staircases to the construction site through logistics, and then installs the staircases through hoisting and positioning. This method can greatly simplify the construction process at the construction site and improve the construction speed.

[0004] However, such finished precast staircase components are heavy and can only be installed with the assistance of large hoisting equipment (such as tower cranes and large cranes). Therefore, there are relatively high requirements for the environmental structure of the installation site, and they cannot be used for later reconstruction. Summary of the Invention

[0005] The utility model provides a lightweight precast staircase component and a staircase pouring system; it solves the problems in the prior art that the finished precast staircase component is heavy, resulting in high requirements for on-site construction conditions and inflexible installation during installation.

[0006] The above technical problems of the utility model are mainly solved by the following technical solutions: A lightweight precast staircase component, comprising:

[0007] A bottom plate precast component, in which a steel mesh is embedded. An upwardly bent upper limit plate is integrally cast at the upper end of the bottom plate precast component. An upper overlapping block protruding outward is integrally cast on the upper limit plate. A overlapping steel bar is also horizontally extended on the upper limit plate. A downwardly bent lower limit plate is integrally cast at the lower end of the bottom plate precast component. A lower overlapping block protruding outward is integrally cast on the lower limit plate. A overlapping steel bar is also horizontally extended on the lower limit plate. A plurality of positioning steel bars protrude from both sides of the bottom plate precast component. The positioning steel bars and the overlapping steel bars are the exposed parts of the steel mesh;

[0008] Two side plate precast components, which are fixed on both side surfaces of the bottom plate precast component. A plurality of steps are formed at the upper edge of the side plate precast component. A plurality of positioning holes are opened at the lower edge of the side plate precast component, and the positioning steel bars are located therein;

[0009] The stepped precast member is adhesively fixed on the steps of the two side plate precast members.

[0010] The bottom plate precast member, the side plate precast members and the stepped precast member in the present utility model are all factory precast members, which are transported to the construction site by logistics for assembly. The general assembly process is as follows: lay the bottom plate precast member flat, then fit the two side plate precast members against the two side walls of the bottom plate precast member, and ensure that the positioning steel bars are inserted into the positioning holes one by one. The diameter of the positioning hole is slightly larger than the outer diameter of the positioning steel bar. Even if the deviation of the positioning steel bar is large, it can be forced to bend to make it aligned. Then, dry hanging glue is injected into the positioning hole or a fastener that can wedge the positioning steel bar is inserted. Then, the stepped precast member is covered on the steps of the two side plate precast members, and fixed docking is achieved through construction glue such as dry hanging glue. The material of the stepped precast member can be building materials such as cement, terrazzo, artificial stone, etc. The stepped precast member can be a multi-step structure or a single-step structure. After the present utility model is completely assembled, its interior is a hollow structure, and its weight is much lighter than that of the existing finished staircase precast member, and it can be hoisted by a miniaturized hoisting device. After the present utility model is installed in place, temporary pouring is carried out. The bottom plate precast member, the side plate precast members and the stepped precast member are not only the formwork during in-situ pouring but also part of the staircase.

[0011] Further, several steel bar segments protrude from the inner side of the side plate precast member. After in-situ pouring, the steel bar segments are integrated with the in-situ poured cement, so that the connection between the side plate precast member and the in-situ poured cement is more firm, reducing the possibility of subsequent cracking.

[0012] The present utility model also provides a staircase pouring system, which is characterized in that: it includes a staircase lower connecting body, a staircase upper connecting body and a staircase precast member connected between the two. The staircase precast member is the above-mentioned lightweight staircase precast member. A lower pouring groove is reserved on the lower connecting body, and a receiving steel bar is exposed in the lower pouring groove. An upper pouring groove is reserved on the upper connecting body, and a receiving steel bar is also exposed in the upper pouring groove. The overlapping steel bar is fixedly connected with the receiving steel bar. The upper limiting plate abuts against the staircase upper connecting body, and the lower limiting plate abuts against the staircase lower connecting body. A lower overlapping groove matching the lower overlapping block is also provided in the lower pouring groove, and an upper overlapping groove matching the upper overlapping block is also provided in the upper pouring groove.

[0013] The receiving steel bar and the overlapping steel bar are generally fixed by wire binding or on-site welding. Then, in-situ pouring of cement is required in both pouring grooves. After complete curing, the receiving steel bar and the overlapping steel bar are completely fixed by the cement, thereby realizing the complete fixed connection between the staircase precast member and the staircase lower connecting body and the staircase upper connecting body. Through the above scheme, cracks are not likely to appear at the joints of the staircase in the later stage.

[0014] Therefore, the utility model has the following characteristics compared with the prior art: 1. The utility model is assembled on-site, the components are smaller in size, and the interior after assembly is a hollow structure. Its weight is much lighter than that of the existing finished staircase prefabricated parts, and it can be hoisted by a miniaturized hoisting device. Therefore, the requirements for the construction site conditions are relatively low, and it can be applied to most construction sites; 2. Cracks are not likely to appear at the joints of the staircase in the later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG. Figure 1 is a partially disassembled structural schematic diagram of the utility model during actual installation;

[0016] FIG. Figure 2 is a side view of the utility model;

[0017] FIG. Figure 3 is an enlarged view of the assembly part of the bottom plate prefabricated part and the side plate prefabricated part;

[0018] FIG. Figure 4 is a structural schematic diagram of the staircase pouring system. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The technical solution of the utility model will be further specifically described below through embodiments and in combination with the drawings.

[0020] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0021] Embodiment 1: Refer to Figure 1 、 Figure 2 and Figure 4 , a lightweight staircase prefabricated part, comprising:

[0022] The bottom plate precast member 100 has a steel mesh embedded therein. An upwardly bent upper limit plate 110 is integrally cast at the upper end of the bottom plate precast member. An upper lapping block 120 protruding outward is integrally cast on the upper limit plate. A lapping steel bar 130 is horizontally extended on the upper limit plate. A downwardly bent lower limit plate 140 is integrally cast at the lower end of the bottom plate precast member. A lower lapping block 150 protruding outward is integrally cast on the lower limit plate. A lapping steel bar is also horizontally extended on the lower limit plate. A number of positioning steel bars 160 protrude from both sides of the bottom plate precast member. The distance between adjacent positioning steel bars is 40 to 60 centimeters. The positioning steel bars and the lapping steel bars are the exposed parts of the steel mesh. The lapping steel bar is of a U-shaped structure;

[0023] Two side plate precast members 200 are fixed to both side surfaces of the bottom plate precast member. A number of steps 210 are formed at the upper edge of the side plate precast member. A number of positioning holes 220 are formed at the lower edge of the side plate precast member, and the positioning steel bars are located therein;

[0024] The stepped precast member 300 is adhesively fixed to the steps of the two side plate precast members.

[0025] See Figure 3 , a stepped hole 230 is provided outside the positioning hole. A plug member 240 is plugged in the stepped hole. A wedging body 250 extending into the positioning hole is provided on the plug member. A jack hole penetrating the plug member is provided on the wedging body, and the positioning steel bar is located in the jack hole.

[0026] In this embodiment, the bottom plate precast member, the side plate precast member and the stepped precast member are all factory precast members, which are transported to the construction site by logistics for assembly. The general assembly process is as follows: lay the bottom plate precast member flat, then fit the two side plate precast members to the two side walls of the bottom plate precast member, and ensure that the positioning steel bars and the positioning holes are inserted in a one-to-one correspondence. The diameter of the positioning hole is slightly larger than the outer diameter of the positioning steel bar. Even if the deviation of the positioning steel bar is large, it can be forced to bend to make it aligned. Then, wedge the plug members into the positioning holes one by one. The plug members are made of rubber or plastic, and can be forced to wedge in by knocking the plug members with a hammer, which plays a role in fixing the positioning steel bars and the side plate precast members. Then, cover the stepped precast member on the steps of the two side plate precast members, and achieve fixed docking through construction glue such as dry hanging glue. The material of the stepped precast member can be building materials such as cement, terrazzo, artificial stone, etc. The stepped precast member can be a multi-step structure or a single-step structure. After this embodiment is completely assembled, its interior is a hollow structure, and its weight is much lighter than that of the existing finished staircase precast member, and it can be hoisted by a miniaturized hoisting device. After this embodiment is installed in place, temporary pouring is carried out. The bottom plate precast member, the side plate precast member and the stepped precast member are not only the formwork during casting, but also a part of the staircase.

[0027] See Figure 1, several reinforcing bar segments 260 are protruded and provided on the inner side of the side plate prefabricated part, and the ends of the reinforcing bar segments can be bent. After the reinforcing bar segments are cast-in-place, they are integrated with the cast-in-place cement, so that the connection between the side plate prefabricated part and the cast-in-place cement is more firm, reducing the possibility of subsequent cracking.

[0028] See Figure 2 , an upper overlapping body 270 is integrally cast at the upper end of the side plate prefabricated part, and a lower overlapping body 280 is integrally cast at the lower end of the side plate prefabricated part.

[0029] See Figure 1 and Figure 4 , this embodiment also discloses a staircase casting system, which includes a staircase lower connecting body 300, a staircase upper connecting body 400, and a staircase prefabricated part connected between the two. The staircase prefabricated part is the above-mentioned lightweight staircase prefabricated part. A lower casting groove 310 is reserved on the lower connecting body, and a receiving reinforcing bar 320 is exposed in the lower casting groove. An upper casting groove 410 is reserved on the upper connecting body, and a receiving reinforcing bar is also exposed in the upper casting groove. The overlapping reinforcing bar is fixedly connected with the receiving reinforcing bar. The upper limiting plate abuts against the staircase upper connecting body, and the lower limiting plate abuts against the staircase lower connecting body. A lower overlapping groove matching the lower overlapping block is also provided in the lower casting groove, and an upper overlapping groove matching the upper overlapping block is also provided in the upper casting groove; the upper overlapping body and the lower overlapping body on the side plate prefabricated part respectively overlap on both sides of the upper casting groove and the lower casting groove, playing a role of lateral positioning.

[0030] The receiving reinforcing bar and the overlapping reinforcing bar are generally fixed by means of wire binding or on-site welding. Then, cement is cast-in-place in both casting grooves. After being completely cured, the receiving reinforcing bar and the overlapping reinforcing bar are completely fixed by the cement, thereby realizing the complete fixed connection between the staircase prefabricated part and the staircase lower connecting body and the staircase upper connecting body. Through the above scheme, cracks are not likely to appear at the joints of the staircase in the later stage.

[0031] It is obvious to those skilled in the art that the present utility model can be changed into various ways, and such changes are not considered to depart from the scope of the present utility model. All such modifications obvious to those skilled in the art will be included within the scope of the present claims.

Claims

1. A lightweight staircase prefabricated component, characterized in that: include: A bottom plate prefabricated part, wherein a steel mesh is embedded in the bottom plate prefabricated part, an upper limit plate bent upwards is integrally casted on the upper end of the bottom plate prefabricated part, an upper overlap block protruding outwards is integrally cast on the upper limit plate, and overlap steel bars are also horizontally extended from the upper limit plate, a lower limit plate bent upwards is integrally casted on the lower end of the bottom plate prefabricated part, a lower overlap block protruding outwards is integrally cast on the lower limit plate, and overlap steel bars are also horizontally extended from the lower limit plate, and a plurality of positioning steel bars are extended from both sides of the bottom plate prefabricated part; Two side plate prefabricated parts are fixed to the two side surfaces of the bottom plate prefabricated part, the upper edge of the side plate prefabricated part is formed with a plurality of steps, and the lower edge of the side plate prefabricated part is provided with a plurality of positioning holes, in which the positioning steel bars are located; The step prefabricated component is adhesively fixed on the steps of the two side panel prefabricated components.

2. The lightweight staircase prefabricated component according to claim 1 is characterized in that: A plurality of steel bar segments are protruding from the inner side of the side plate prefabricated part.

3. The lightweight staircase prefabricated component according to claim 1 is characterized in that: The overlapping steel bars are of U-shaped structure.

4. The lightweight staircase prefabricated component according to claim 1 is characterized in that: An upper lap joint is integrally cast at the upper end of the side panel prefabricated component, and a lower lap joint is integrally cast at the lower end of the side panel prefabricated component.

5. The lightweight staircase prefabricated component according to claim 1 is characterized in that: A step hole is provided on the outer side of the positioning hole, a plug is plugged in the step hole, a wedge is provided on the plug that extends into the positioning hole, an insertion hole is provided on the wedge that passes through the plug, and the positioning steel bar is located in the insertion hole.

6. A stair casting system, characterized in that: It comprises a lower connector of stairs, an upper connector of stairs and a prefabricated staircase part connected therebetween, the prefabricated staircase part being a lightweight prefabricated staircase part as claimed in any one of claims 1 to 5, the lower connector being provided with a lower casting trough, receiving steel bars being exposed in the lower casting trough, the upper connector being provided with an upper casting trough, receiving steel bars being also exposed in the upper casting trough, the lap steel bars being fixedly connected to the receiving steel bars, the upper limit plate being abutted against the upper connector of stairs, the lower limit plate being abutted against the lower connector of stairs, the lower casting trough being provided with a lower lap groove matching with a lower lap block, and the upper casting trough being provided with an upper lap groove matching with an upper lap block.

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