阅读说明：本技术 一种基于无机材料喷射的钢梁填充方法 (Steel beam filling method based on inorganic material injection ) 是由 邓竞 赵力 孙宇飞 秦光明 冷园 陈永泉 郦永杰 于 2021-07-15 设计创作，主要内容包括：本发明涉及一种基于无机材料喷射的钢梁填充方法,先在H型钢钢梁的腹板两侧预先填充岩棉层,岩棉层的填充厚度小于腹板两侧H型钢钢梁的上、下翼缘延伸宽度；再在腹板每一侧的岩棉层外部沿钢梁长度方向焊接若干C型箍筋,C型箍筋的上折弯部顶面焊接在钢梁上翼缘底面上,C型箍筋的下折弯部底面焊接在钢梁下翼缘顶面上,上折弯部的内侧边及下折弯部的内侧边与腹板共同形成对岩棉层的夹持限位；施工现场对每一侧的岩棉层外部喷射防火石膏砂浆将C型箍筋包覆住,防火石膏砂浆喷射至与上、下翼缘的侧端面平齐；每一侧的防火石膏砂浆外部喷射纤维增强防火石膏砂浆。本发明具有施工效率高、施工作业程序简化、施工成本低以及避免表观开裂的特点。(The invention relates to a steel beam filling method based on inorganic material injection, which comprises the steps of firstly, pre-filling rock wool layers on two sides of a web plate of an H-shaped steel beam, wherein the filling thickness of the rock wool layers is smaller than the extension widths of upper and lower flanges of the H-shaped steel beam on the two sides of the web plate; welding a plurality of C-shaped stirrups outside the rock wool layer on each side of the web plate along the length direction of the steel beam, welding the top surfaces of upper bending parts of the C-shaped stirrups on the bottom surface of an upper flange of the steel beam, welding the bottom surfaces of lower bending parts of the C-shaped stirrups on the top surface of a lower flange of the steel beam, and jointly forming clamping limit on the rock wool layer by the inner side edge of the upper bending part, the inner side edge of the lower bending part and the web plate; spraying fireproof gypsum mortar to the outside of the rock wool layer on each side to coat the C-shaped stirrup in a construction site, and spraying the fireproof gypsum mortar to be flush with the side end faces of the upper flange and the lower flange; and fiber reinforced fireproof gypsum mortar is sprayed outside the fireproof gypsum mortar on each side. The invention has the characteristics of high construction efficiency, simplified construction operation procedure, low construction cost and avoidance of apparent cracking.)

1. A steel beam filling method based on inorganic material spraying is characterized in that: the method comprises the following steps:

step 1: rock wool layers are pre-filled on two sides of a web plate of the H-shaped steel girder, the filling thickness of the rock wool layers is smaller than the extending width of upper and lower flanges of the H-shaped steel girder on the two sides of the web plate, and the step is finished in a factory;

step 2: welding a plurality of C-shaped stirrups outside the rock wool layer on each side of the web plate along the length direction of the steel beam, welding the top surfaces of upper bending parts of the C-shaped stirrups on the bottom surface of an upper flange of the steel beam, welding the bottom surfaces of lower bending parts of the C-shaped stirrups on the top surface of a lower flange of the steel beam, and jointly forming clamping limit on the rock wool layer by the inner side edge of the upper bending part, the inner side edge of the lower bending part and the web plate;

and step 3: and fireproof gypsum mortar is sprayed to the outer part of the rock wool layer at each side in a construction site to coat the C-shaped hooping, and the fireproof gypsum mortar is sprayed to be flush with the side end faces of the upper flange and the lower flange.

2. The method for filling a steel beam based on inorganic material injection as claimed in claim 1, wherein: and after the step 3 is finished, spraying fiber reinforced fireproof gypsum mortar outside the fireproof gypsum mortar on each side of the construction site.

3. The method for filling a steel beam based on inorganic material injection as claimed in claim 1, wherein: before the step 1 is executed, stiffening plates are respectively welded between the upper flange and the lower flange at the two ends of the steel beam, the stiffening plates are respectively vertical to the upper flange, the lower flange and the web plate, and the rock wool layer is filled between the two stiffening plates.

4. The method for filling a steel beam based on inorganic material injection as claimed in claim 3, wherein: the web plate on the outer side of the stiffening plate is provided with a mounting hole.

Technical Field

The invention relates to the technical field of constructional engineering, in particular to a steel beam filling method based on inorganic material spraying.

Background

The precast beam is a key component in an assembly type building, an H-shaped steel beam is often adopted, and because two side surfaces of an H-shaped steel web are cavities, inconvenience is brought to indoor decoration in a residential building, and the cavities on the side surfaces of the H-shaped steel are often required to be filled. When the side face of the H-shaped steel web is filled, the filling mode and the selectivity of the filled substances are many, and the selection result is closely related to the construction cost and the functional characteristics of the filled steel beam.

At present, in the building industry, the common method mainly adopts brick blocks for filling, for example, the invention patent with the publication number of CN204826404U discloses 'steel beams filled with the blocks', because the size and the variety of the steel beams are more, the cutting of the aerated block and the gypsum board wastes time and labor, the filling process is quite complicated, the construction period is long, the cost is high, and the noise and the dust generated in the processing process can influence the health of constructors; and, the filling compactness by adopting the building blocks is also poor.

Except for the filling mode and the effect of the precast beam, the fireproof problem of the precast beam also needs to be considered, the existing steel beam usually adopts the mode of spraying fireproof paint and coating mortar to achieve the fireproof purpose, and the two processes need long operation time, so that the operation continuity is poor, and the construction progress is influenced. The inventor proposes a steel beam filling method based on inorganic material spraying, which can simplify the field operation amount and the filling process, and the scheme is generated thereby.

Disclosure of Invention

The invention discloses a steel beam filling method based on inorganic material injection, which has the characteristics of time saving, low cost and simplified workload, and is realized by the following technical scheme:

a steel beam filling method based on inorganic material spraying comprises the following steps:

step 1: rock wool layers are pre-filled on two sides of a web plate of the H-shaped steel girder, the filling thickness of the rock wool layers is smaller than the extending width of upper and lower flanges of the H-shaped steel girder on the two sides of the web plate, and the step is finished in a factory;

step 2: welding a plurality of C-shaped stirrups outside the rock wool layer on each side of the web plate along the length direction of the steel beam, welding the top surfaces of upper bending parts of the C-shaped stirrups on the bottom surface of an upper flange of the steel beam, welding the bottom surfaces of lower bending parts of the C-shaped stirrups on the top surface of a lower flange of the steel beam, and jointly forming clamping limit on the rock wool layer by the inner side edge of the upper bending part, the inner side edge of the lower bending part and the web plate;

and step 3: and fireproof gypsum mortar is sprayed to the outer part of the rock wool layer at each side in a construction site to coat the C-shaped hooping, and the fireproof gypsum mortar is sprayed to be flush with the side end faces of the upper flange and the lower flange.

Further, after the step 3 is finished, spraying fiber reinforced fireproof gypsum mortar outside the fireproof gypsum mortar on each side of the construction site.

Further, before the step 1 is executed, stiffening plates are respectively welded between the upper flange and the lower flange at the two ends of the steel beam, the stiffening plates are respectively vertical to the upper flange, the lower flange and the web plate, and the rock wool layer is filled between the two stiffening plates.

Furthermore, a web plate on the outer side of the stiffening plate is provided with a mounting hole.

The invention adopts the technology of combining factory pre-filling and field spraying of fireproof gypsum mortar to complete the filling of the precast beam, does not need to cut the aerated block and the gypsum board, can reduce the construction noise and dust, and improves the construction efficiency; the filling and the fireproof process are integrally formed, so that the construction operation procedure is simplified, and the construction cost is reduced; the outer layer is sprayed with the fiber reinforced fireproof gypsum mortar, so that the apparent cracking caused by the deformation of the precast beam can be prevented, and the apparent quality is improved.

Drawings

FIG. 1 is a schematic cross-sectional view of a steel beam filled by the filling method of the present invention;

fig. 2 is a front view of fig. 1.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

The embodiment discloses a steel beam filling method based on inorganic material spraying, and the effect of the steel beam after being filled according to the filling method is shown in figures 1 and 2. The girder steel in this embodiment adopts H shaped steel girder steel, and the girder steel comprises top flange 1, bottom flange 2 and web 3, and top flange 1 and bottom flange 2 parallel arrangement from top to bottom, web 3 are located the middle part and link together top flange 1 and bottom flange 2, and the both sides of web 3 form the cavity structure and need fill. The method for filling the steel beam structure comprises the following specific steps: firstly, in order to connect steel beams, mounting holes 8 need to be formed in the web plates 3 at the end parts of each steel beam, stiffening plates 9 are respectively welded between the upper flanges 1 and the lower flanges 2 at the two ends of each steel beam, the stiffening plates 9 are respectively vertical to the upper flanges, the lower flanges and the web plates 3, and the stiffening plates 9 not only play a role in strengthening the strength of the connecting joints at the end parts of the steel beams, but also can separate filling areas inside the steel beams. And a cavity surrounded by the two stiffening plates 9 and the web plate 3 on each side is filled with a cement-based rock wool layer 4, and the filling thickness of the rock wool layer 4 is smaller than the extension width of the upper flange and the lower flange of the steel beam on the two sides of the web plate 3. Next, a plurality of C-shaped stirrups 5 are welded along the length direction of the steel beam outside the rock wool layer 4 on each side of the web plate 3, the top surface of the upper bending part of the C-shaped stirrups 5 is welded on the bottom surface of the upper flange 1 of the steel beam, the bottom surface of the lower bending part of the C-shaped stirrups 5 is welded on the top surface of the lower flange 2 of the steel beam, the inner side of the upper bending part and the inner side of the lower bending part are clamped and limited by the common formation of the web plate 3, and the steps are all prefabricated in a factory. After the stone wool is transported to a construction site, fireproof gypsum mortar 6 is sprayed outside the rock wool layer 4 on each side to coat the C-shaped stirrup 5, and the fireproof gypsum mortar 6 is sprayed to the positions which are flush with the side end faces of the upper flange and the lower flange. And finally, spraying fiber reinforced fireproof gypsum mortar 7 outside the fireproof gypsum mortar 6 on each side to form an anti-crack protective layer.

The steel beam filling method is high in prefabrication degree, and the pre-filling and spraying processes are combined, so that the construction process can be simplified, the construction period can be shortened, the construction cost can be reduced, and the influence of the construction environment on the health of personnel can be reduced. In the fireproof treatment of the steel beam, the sprayed fireproof gypsum mortar 6 is used for replacing the traditional fireproof coating and plastering mortar structure, so that the construction procedures can be reduced while the fireproof performance is ensured. The invention also utilizes the function of preventing cracks of the fibers in the sprayed fiber reinforced fireproof gypsum mortar 7 to improve the apparent quality of the steel beam.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.