CN-224228142-U - Stair with safety protection structure prefabricated by ECC concrete

Abstract

The utility model discloses a stair with a safety protection structure, which is prefabricated by ECC concrete, and consists of a stepping section and a platform section, wherein the stepping section is positioned below the left side of Ping Taiduan, a stepping section protection railing and a platform section protection railing are respectively arranged on the side of the stepping section, a grouting sleeve injection hole is formed in the platform section, the lower end of the grouting sleeve injection hole is connected with a grouting sleeve, and reinforcing rib nets are arranged in the stepping section and the platform section. The stair with the safety protection structure prefabricated by ECC concrete has the characteristics of stable structure, high durability, convenient construction and excellent crack resistance, and is suitable for stair construction systems in public buildings, industrial plants and residential projects.

Inventors

• CHEN KEYING
• DU JIAWEN
• ZHONG YUANXI
• HU KEXIN
• HE WEI

Assignees

• 西南交通大学

Dates

Publication Date

20260512

Application Date

20250715

Claims (8)

1. 1. The stair with the safety protection structure prefabricated by ECC concrete is characterized by comprising a step section (1) and a platform section (2), wherein the step section (1) is positioned below the left side of the platform section (2), step section protection rails (3) and platform section protection rails (8) are respectively arranged on the side sides of the step section (1) on the platform section (2), a grouting sleeve filling hole (5) is formed in the platform section (2), the lower end of the grouting sleeve filling hole (5) is connected with a grouting sleeve (9), reinforcing rib nets (6) are respectively arranged in the step section (1) and the platform section (2), side baffles (4) are fixedly arranged on the right side of the step section (1), and the left end of the step section protection rails (3) are fixed on a platform base (7).
2. 2. A stairway with safety protection structure prefabricated with ECC concrete according to claim 1, characterised in that it is used for pouring ECC concrete through the grouting sleeve injection holes (5).
3. 3. A stair with a safety protection structure prefabricated by ECC concrete according to claim 1, characterized in that the front end of the platform base (7) is fixedly connected with one end of the tread section (1).
4. 4. The stair with the safety protection structure prefabricated by ECC concrete according to claim 1, wherein the step section protection railing (3) and the platform section protection railing (8) are fixed with the stair structure through pre-buried connecting pieces, and the railing height is larger than 900mm.
5. 5. The stair with the safety protection structure prefabricated by ECC concrete according to claim 1, wherein the reinforcing rib net (6) is embedded in the tread section (1) and the platform section (2), welded into a net structure by adopting steel bars and integrally cast with ECC materials, the fiber volume ratio of the ECC concrete is not less than 2%, the compressive strength is not less than 40MPa, and the crack resistance ductility is more than 10 times of that of common concrete.
6. 6. The stair prefabricated by ECC concrete and provided with a safety protection structure according to claim 1, wherein each step surface of the step section (1) is provided with a slightly inclined water guiding slope, and the inclination angle is 2-4 degrees.
7. 7. The stair with the safety protection structure prefabricated by ECC concrete according to claim 1, wherein the grouting sleeve (9) is used for realizing rigid connection among components through on-site grouting, the step section guard rail (3) and the platform section guard rail (8) are detachable, and on-site quick installation and replacement are realized through a buckle structure.
8. 8. The stair with the safety protection structure prefabricated by ECC concrete according to claim 1, wherein the surfaces of the tread section (1) and the platform section (2) are provided with anti-skid textures, and the depth of the textures is 2 mm-5 mm.

Description

Stair with safety protection structure prefabricated by ECC concrete Technical Field The utility model relates to the field of stairs, in particular to a stair with a safety protection structure, which is prefabricated by ECC concrete. Background At present, the stair structure mainly adopts a common reinforced concrete cast-in-situ or steel structure form. The cast-in-place concrete stairway has long construction period and large influence of site conditions on the quality, and the steel structure stairway has certain defects in fire resistance and durability. In addition, traditional concrete materials have cracking risks, which affect structural safety and look and feel. In recent years ECC (Engineered Cementitious Composites) has been used as a fiber reinforced concrete with high ductility and high toughness in high performance structures, especially for the manufacture of prefabricated parts. However, there is currently no specially designed precast stairway construction system based on ECC concrete, and there is still room for improvement in particular in terms of safety protection, module assembly and long-term durability. Therefore, it is necessary to design an ECC prefabricated staircase system with complete structure, convenient assembly, safety and reliability, so as to adapt to the requirements of modern buildings on high-performance components. Disclosure of utility model The utility model mainly aims to provide a stair with a safety protection structure, which is prefabricated by ECC concrete and can effectively solve the problems in the background technology. In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: Utilize prefabricated stair that has safety protection structure of ECC concrete, this stair comprises section of marking time and platform section, and the section of marking time is located Ping Taiduan's left side below position, the avris that the section of marking time is located the platform section is provided with section of marking time respectively and protects railing and platform section and protect railing, and sets up the grout sleeve filling hole on the platform section, and the lower extreme of this grout sleeve filling hole is connected with a grout sleeve, the strengthening rib net is all installed to the inside of section of marking time and platform section, and the right side position fixed mounting of section of marking time has the side shield, the left end of the section of marking time protects railing and is fixed in on the platform base. Preferably, the grouting sleeve is used for grouting ECC concrete through the grouting sleeve injection hole. Preferably, the front end of the platform base is fixedly connected with one end of the stepping section. Preferably, the step section protection railing and the platform section protection railing are fixed with the stair structure through pre-buried connecting pieces, and the railing height is greater than 900mm. Preferably, the reinforcing rib net is embedded in the stepping section and the platform section, is welded into a net structure by adopting reinforcing steel bars and is integrally cast with ECC materials, and in the proportion of ECC concrete, the fiber volume rate is not less than 2%, the compression strength is not less than 40MPa, and the crack resistance ductility is more than 10 times of that of common concrete. Preferably, each step surface of the step section is provided with a slightly inclined water guide slope, and the inclination angle is 2-4 degrees. Preferably, the grouting sleeve realizes rigid connection among components through on-site grouting, the stepping section protection railing and the platform section protection railing are detachable, and on-site quick installation and replacement are realized through a buckle structure. Preferably, the surfaces of the stepping section and the platform section are provided with anti-skid textures, and the depth of the textures is 2 mm-5 mm. Compared with the prior art, the utility model has the following beneficial effects that the stair with the safety protection structure prefabricated by ECC concrete: 1. The whole ECC material is adopted, so that the anti-cracking performance is strong, the ductility is good, and the service life and the safety of the stair structure are obviously improved; 2. the prefabricated parts are assembled on site, so that the construction efficiency is high and the quality is stable; 3. The complete safety protection system is arranged, so that personnel or objects are effectively prevented from falling; 4. can realize standardized mass production and is convenient for transportation and installation. Drawings FIG. 1 is an overall construction diagram of a stair with a safety structure prefabricated with ECC concrete according to the present utility model. FIG. 2 is a schematic view of the connection structure of the side shield and the tread segment according to the