阅读说明：本技术 混凝土预制楼梯及其安装施工方法 (Concrete prefabricated staircase and installation and construction method thereof ) 是由 沈汉斌 张立林 张欢鸾 于 2021-08-26 设计创作，主要内容包括：本发明涉及一种混凝土预制楼梯,包括与上平台连接的上连接端,与下平台连接的下连接端,该预制楼梯由第一组块和第二组块组成,第一组块设置于靠墙一侧,第二组块设置于靠扶栏一侧；第一组块、第二组块分别设有各自的销件预留洞和吊装埋件；上述混凝土预制楼梯的安装施工方法,1)计算构件重量,根据设计的施工图纸先进行预制楼梯的整体计算;2)与施工总包单位结合确定整体工程使用的塔吊最佳吊重,根据吊重将预制楼梯拆分成多个组块;3)工厂制作模具进行生产,将生产好的各混凝土组块构件运输至现场;4)现场将各组块分别安装到上平台和下平台上并固定;5)各组块之间的楼梯接缝若大于50mm,则采用砂浆封堵。(The invention relates to a concrete prefabricated staircase, which comprises an upper connecting end connected with an upper platform and a lower connecting end connected with a lower platform, wherein the prefabricated staircase consists of a first block and a second block, the first block is arranged on one side close to a wall, and the second block is arranged on one side close to a handrail; the first block and the second block are respectively provided with a pin piece reserved hole and a hoisting embedded piece; the installation and construction method of the concrete prefabricated staircase comprises the steps of 1) calculating the weight of components, firstly performing overall calculation on the prefabricated staircase according to a designed construction drawing, 2) determining the optimal hoisting weight of a tower crane used in the overall engineering by combining with a construction general packet unit, splitting the prefabricated staircase into a plurality of blocks according to the hoisting weight, 3) manufacturing a mold in a factory for production, transporting each produced concrete block component to the site, 4) respectively installing and fixing each block on an upper platform and a lower platform on the site, and 5) blocking the staircase joints among the blocks by adopting mortar if the staircase joints are larger than 50 mm.)

1. The utility model provides a precast concrete stair, includes the last link of being connected with the upper ledge, the lower link of being connected with lower platform, its characterized in that: the prefabricated staircase consists of a first block (1) and a second block (2), wherein the first block (1) is arranged on one side close to a wall, and the second block (2) is arranged on one side close to a handrail; the upper connecting end and the lower connecting end of the first block (1) and the second block (2) are respectively provided with at least one pin piece reserved hole (3); the upper end and the lower end of the first block (1) and the second block (2) are respectively provided with a pair of parallel hoisting embedded parts (4).

2. The precast concrete stair of claim 1, wherein: each step edge of the stair is provided with an anti-skid groove (6).

3. The installation and construction method of the concrete precast stairway according to claim 1, characterized in that: the method comprises the following steps:

calculating the weight of a component, and performing integral calculation of the prefabricated staircase according to a designed construction drawing;

step two: determining the optimal hoisting weight of a tower crane used in the whole project by combining with a construction total package unit, and splitting the prefabricated staircase into a plurality of blocks according to the hoisting weight;

step three: manufacturing a mold in a factory for production, and respectively manufacturing reserved holes (3) for connecting pin pieces with the upper platform and the lower platform at the upper end and the lower end of each block; two hoisting embedded parts (4) are respectively arranged on the surfaces of the first step and the last step;

step four: transporting each produced concrete block member to the site, and respectively installing and fixing each block on the upper platform and the lower platform on the site;

step five: if the stair joints (5) between the blocks are larger than 50mm, mortar is adopted for plugging.

Technical Field

The invention relates to the field of fabricated concrete buildings, in particular to a concrete prefabricated staircase.

Background

In the assembled concrete building, the stair are mostly prefabricated construction. Generally, the stairs between the upper and lower platforms are integrally prefabricated according to the design size. The weight of conventional stair is 4 tons to 5 tons weight mostly, and the stair design is wider, and prefabricated stair load is bigger. In the prior art, enough large-scale tower cranes are required for construction, heavy-scale tower cranes are required for the whole prefabricated staircases due to heavy weight, and the large-scale tower cranes are high in use cost. Even in partial projects, a large tower crane needs to be specially replaced during stair installation, so that the cost is increased. Meanwhile, the single components of the existing integrally prefabricated staircase are large in size and heavy in weight, so that great difficulty is caused in manufacturing, transportation and installation.

Disclosure of Invention

In order to solve the technical problems, the invention improves and optimizes the traditional prefabricated staircase.

The invention solves the problems and adopts the technical scheme that:

a concrete prefabricated staircase comprises an upper connecting end connected with an upper platform and a lower connecting end connected with a lower platform, and is composed of a first block and a second block, wherein the first block is arranged on one side close to a wall, and the second block is arranged on one side close to a handrail; the upper connecting end and the lower connecting end of the first block and the second block are respectively provided with at least one pin piece reserved hole; the upper end and the lower end of the first block and the second block are respectively provided with a pair of parallel hoisting embedded parts.

Compared with the prior art, the invention adopting the structure has the beneficial effects that:

this scheme is with the structure that former holistic one section prefabricated staircase design was assembled for the polylith combination, has reduced the volume and the load of single component, reaches the technical effect that stair installation was realized to small-size tower crane, greatly reduced construction cost.

Preferably, the concrete precast stairway further comprises:

each step edge of the stair is provided with an anti-skid groove.

The invention also provides an installation and construction method of the concrete prefabricated staircase, which comprises the following steps:

step one, calculating the weight of the component, and performing integral calculation of the prefabricated staircase according to a designed construction drawing.

Step two: and determining the optimal hoisting weight of the tower crane used in the whole project by combining with a construction total package unit, and splitting the prefabricated staircase into a plurality of blocks according to the hoisting weight.

Step three: and (4) manufacturing a mould in a factory for production, and transporting each produced concrete block member to the site.

Step four: and installing and fixing the blocks on the upper platform and the lower platform respectively on the site.

Step five: if the stair joints among the blocks are larger than 50mm, mortar is adopted for plugging.

Compared with the prior art, the invention adopting the method has the beneficial effects that:

the invention has fast construction speed, and each block has an independent fixing structure, so the whole body is more stable. The small-size member is convenient to install and construct and high in safety.

Drawings

Fig. 1 is a schematic structural view of the prefabricated staircase.

FIG. 2 is a schematic diagram of a single block structure of the present invention.

Fig. 3 is a block end structure diagram of the present invention.

Fig. 4 is a block diagram of the grooves for fixing the lifting inserts on the stairway according to the invention.

In the figure: 1. a first block; 2. a second block; 3. reserving a hole on the pin piece; 4. hoisting the embedded part; 5. seaming; 6. and (4) an anti-slip groove.

Detailed Description

The invention will be further illustrated by the following examples, which are intended only for a better understanding of the present invention and therefore do not limit the scope of the invention.

Referring to fig. 1 to 4, the concrete prefabricated staircase provided by the invention comprises an upper connecting end connected with an upper platform and a lower connecting end connected with a lower platform, and is composed of a first block 1 and a second block 2, wherein the first block 1 is arranged on one side close to a wall, and the second block 2 is arranged on one side close to a handrail; the upper connecting end and the lower connecting end of the first block 1 and the second block 2 are respectively provided with at least one pin piece reserved hole 3; the upper end and the lower end of the first block 1 and the second block 2 are respectively provided with a pair of parallel hoisting embedded parts 4.

The hoisting embedded part 4 of the prefabricated staircase is fixedly arranged in a groove, the depth of the groove is 20mm, the diameter of the notch is 60, and the diameter of the bottom of the groove is 50; the hoisting embedment 4 is anchored in the trench bottom concrete structure.

The invention also provides a construction method of the concrete prefabricated staircase, which comprises the following steps:

step one, calculating the weight of the component, and performing integral calculation of the prefabricated staircase according to a designed construction drawing.

Step two: and determining the optimal hoisting weight of the tower crane used in the whole project by combining with a construction total package unit, and splitting the prefabricated staircase into a plurality of blocks according to the hoisting weight.

Step three: manufacturing a mold in a factory for production, and respectively manufacturing reserved holes 3 for connecting pin pieces with the upper platform and the lower platform at the upper end and the lower end of each block; two hoisting embedded parts 4 are respectively arranged on the surface of the first step and the surface of the last step.

Step four: the produced concrete block members are transported to the site, and the blocks are mounted on the upper and lower platforms, respectively, and fixed at the site.

Step five: if the stair joints 5 between the blocks are larger than 50mm, mortar is adopted for sealing.

The invention designs and manufactures the original staircase into two parts or even more parts. Each part is fixed respectively during construction, the independent blocks have the same fixing structure, all the blocks are spliced into the whole stair, the stability of the stair is not influenced even if the seam 5 is arranged in the middle, and the hoisting and installation requirements of the assembled concrete member are met.

And after the components are installed, the joint 5 (the joint width is 50 mm) of the combined stair is blocked by mortar. However, if the later stage of the stair is decorated by paving bricks and the like, the 50mm seam 5 can not be processed in the installation period, and the structure safety can not be influenced.

Each step edge of this prefabricated staircase is equipped with antiskid groove 6. The anti-skid groove 6 can be a linear groove dug on the concrete surface of the step or a groove ground by a brick paving veneer.

According to the invention, the original integral one-section prefabricated staircase is designed into a structure formed by combining and assembling a plurality of blocks, the volume and the load of a single component are reduced, the technical effect of realizing the staircase installation by using the small-sized tower crane is achieved, the problems of large components and heavy weight of the conventional prefabricated staircase are solved, the components are ensured to meet the design requirements, the construction cost of the tower crane and the like is saved, and the construction efficiency is greatly improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, which is defined in the appended claims.