Roof under limited condition and construction method

Abstract

The invention relates to a roof under limited conditions, which comprises concrete roof beams and vertically arranged structural columns, the structural columns are concrete columns and are arranged in double rows, steel primary beams are longitudinally connected between the adjacent concrete columns on two sides, and steel secondary beams are connected between the adjacent steel primary beams. A formwork supporting frame body does not need to be erected, the construction rhythm is accelerated, efficiency is improved, safety is good, and operability is higher.

Description

Technical Field

[0001] The invention relates to the field of civil engineering, and in particular to a roof under restricted conditions and a construction method. Background Art

[0002] In the current metallurgical construction industry, in order to meet the requirements of functionality, safety, and green environmental protection of buildings, the public auxiliary small rooms (such as outdoor dust removal rooms, fan rooms, etc.) of metallurgical projects will be designed as traditional reinforced concrete frame structures, double rows of columns, and the enclosure structure uses infill walls to achieve the purposes of sound insulation, heat preservation, fire prevention and moisture resistance. After the reinforced concrete frame structure is formed, the space in the small room is limited. There are special equipment that cannot be assembled in parts indoors and must be assembled in modular outdoor areas before installation. Often, due to the large size and heavy weight of the single equipment, it is difficult to install it by sliding and pushing and pulling. If the structural column spacing is small, the operability of the installed equipment is even lower, resulting in the inability to install it. Therefore, large equipment must be installed in place in advance before the roof construction. During the construction of reinforced concrete roofs, it is necessary to erect and dismantle the formwork support frame. Due to limited ground space, it is necessary to redesign and adopt an unconventional frame erection plan, which increases the construction safety risk and the cost of equipment finished product protection. In addition, the concrete curing time is long, which also affects the construction progress of the entire project, and the planning and organization of the construction are difficult. Summary of the invention

[0003] The present invention aims to overcome the defects of the prior art, provide a roof and construction method under restricted conditions, solve the problems of difficulty in closed roof construction after equipment is put in place in advance in a limited space, and difficulty in reinforced concrete roof construction after indoor equipment is installed.

[0004] In order to solve the above-mentioned technical problems, the present invention is achieved as follows: A roof under restricted conditions, characterized in that it comprises concrete roof beams and vertically arranged structural columns, wherein the structural columns are concrete columns arranged in double rows, steel main beams are longitudinally connected between adjacent concrete columns on both sides, and steel secondary beams are connected between adjacent steel main beams.

[0005] The roof under restricted conditions is characterized in that: the concrete columns are pre-embedded, and the web of the steel main beam is connected to the pre-embedded parts on the concrete columns by bolt welding through connecting plates.

[0006] The roof under restricted conditions is characterized in that the web plate of the steel secondary beam and the ear plate of the steel main beam are connected by bolt welding through a connecting plate.

[0007] The method for constructing a roof under restricted conditions is characterized in that it comprises the following steps: Step 1: First construct the equipment foundation in the public auxiliary room, reserve the dowels for the concrete columns in advance, and clean up and hand over after the strength is reached, and the civil engineering team withdraws; Step 2: The equipment professionals come to the site to assemble the large equipment, hoist it into place as a whole, cover it with three-proof cloth, and take waterproof, dustproof, anti-corrosion and other finished product protection measures; Step 3: After the equipment is in place, the civil engineering department will continue to construct the double-row reinforced concrete columns and the reinforced concrete main beams on the outside of the roof. The embedded parts of the structural columns will be reserved on the indoor side according to the design requirements for the connection between the steel main beams and the concrete columns; Step 4: Install the steel main beam. The web of the steel main beam is connected to the embedded parts on the concrete column through connecting plate bolt welding. The upper and lower flange plates of the steel main beam are not welded, and are hinged structures. Step 5: Install the steel secondary beams. Set the steel secondary beams between the steel main beams. The web plates of the steel secondary beams are connected to the ear plates of the steel main beams by bolt welding through the connecting plates to form an articulated structure. Step 6: Install the floor slab, the floor slab support is continuously set on the steel beam, and bolts are set on the steel beam to connect with the floor slab; Step 7: Lay the roof panel reinforcement and pour concrete or directly pour concrete according to the design; then carry out wall construction, roof waterproofing, and decoration and renovation.

[0008] The construction method of a roof under restricted conditions is characterized in that the floor slab of the roof is made of corrugated steel plate or reinforced steel truss plate.

[0009] The beneficial effects of the present invention are as follows: It can be seen from the above technical scheme that the present application provides a roof and construction method under restricted conditions. Compared with the traditional construction method of installing the equipment in place and then setting up a frame to cast the roof panels, on the premise of meeting the design requirements and the use function of the building, the frame erection and formwork installation are reduced, the construction process is optimized, the construction efficiency is higher, the construction period is saved, and the safety risks are easier to control. At the same time, the difficulty and cost of protecting the finished equipment are reduced, and the operability is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments: Figure 1 Illustration of the installation of large equipment in confined space.

[0011] Figure 2 Schematic diagram of the roof.

[0012] Figure 3 Schematic diagram of the connection between steel main beam and concrete column.

[0013] Figure 4 Schematic diagram of the hinged connection between the main beam and the secondary beam. DETAILED DESCRIPTION

[0014] The technical solutions of the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments in the embodiments of the present application are within the scope of protection requested by the present application. like Figure 1-4 As shown: a roof under restricted conditions, it includes a concrete roof beam 1 and a vertically arranged structural column 2, the structural column is a concrete column, arranged in double rows, the adjacent concrete columns on both sides are longitudinally connected to the steel main beam 3, and the adjacent steel main beams are connected to the steel secondary beams 4; the concrete columns are pre-embedded with embedded parts 5, the web of the steel main beam is connected to the embedded parts on the concrete column by bolt welding through a first connecting plate 6; the web of the steel secondary beam is connected to the ear plate of the steel main beam by bolt welding through a second connecting plate 7.

[0015] This roof is proposed for single-story public auxiliary small houses. The enclosure structure still uses infill walls. The structural columns are double-row reinforced concrete columns, similar to the frame structure. The roof is a composite roof of steel and concrete. The roof beams along the long side direction (i.e. the column spacing direction) are reinforced concrete beams, and the main roof beams in the short side direction (i.e. the column span direction) are steel beams. The secondary beams between the main beams are steel beams. The steel beams are reasonably selected based on the structural force analysis (such as middle flange or narrow flange H-shaped steel, material Q355B). According to the actual height of the small house, concrete ring beams should be set between the columns according to the specifications to increase the overall stiffness and stability. The roof floor slabs use corrugated steel plates or reinforced steel truss plates instead of wooden formworks. After the floor slabs are installed, concrete can be poured directly, eliminating the process of erecting and dismantling the formwork support frame. The specific construction is as follows: Step 1: First construct the equipment foundation in the public auxiliary room, reserve the dowels for the concrete columns in advance, and clean up and hand over after the strength is reached, and the civil engineering team withdraws; Step 2: Equipment professionals come to the site to assemble large equipment, hoist it into place as a whole, cover it with three-proof cloth, and take waterproof, dustproof, anti-corrosion and other finished product protection measures; Step 3: After the equipment is in place, the civil engineering department will continue to construct the double-row reinforced concrete columns and the reinforced concrete main beams on the outside of the roof. The embedded parts of the structural columns will be reserved on the indoor side according to the design requirements for the connection between the steel main beams and the concrete columns; Step 4: Install the steel main beam. The web of the steel main beam is connected to the embedded parts on the concrete column through connecting plate bolt welding. The upper and lower flange plates of the steel main beam are not welded, and are hinged structures. Step 5: Install the steel secondary beams. Set the steel secondary beams between the steel main beams. The web plates of the steel secondary beams are connected to the ear plates of the steel main beams by bolt welding through the connecting plates to form an articulated structure. Step 6: Install the floor slab, the floor slab support is continuously set on the steel beam, and bolts are set on the steel beam to connect with the floor slab; Step 7: Lay the roof panel reinforcement and pour concrete or directly pour concrete according to the design; then carry out wall construction, roof waterproofing, and decoration and renovation.

[0016] The equipment of the present invention is in place, and the concrete columns and concrete roof beams are cast; the materials are selected according to the design drawings, the steel beams are processed and manufactured, the elevation and size of the embedded parts of the concrete columns are checked, the lines are laid out according to the drawings, and the steel main beams are hoisted. The steel main beams and the concrete columns are connected by bolts and welding through the connecting plates, see the attached Figure 2 , 3 .

[0017] Installation of steel secondary beam. The web of the steel secondary beam is connected to the ear plate of the steel main beam by bolts and welding through the connecting plate. Studs are set on the steel main beam and secondary beam to connect the floor plate. See attached Figure 4 .

[0018] Floor slab installation: The anchor support length between the slab and the main structure should meet the design requirements.

[0019] Roof concrete pouring and maintenance (depending on the specific design, there may be a steel bar installation process).

[0020] The above are only embodiments provided for the present application and are not intended to limit the present application. Although the present application is described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. However, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A roof under restricted conditions, characterized in that: It includes concrete roof beams and vertically arranged structural columns. The structural columns are concrete columns, which are arranged in double rows. Steel main beams are longitudinally connected between the adjacent concrete columns on both sides, and steel secondary beams are connected between the adjacent steel main beams.

2. A roof under restricted conditions according to claim 1, characterized in that: The concrete column is pre-embedded, and the web of the steel main beam is connected to the pre-embedded part on the concrete column by bolt welding through a connecting plate.

3. The roof under restricted conditions according to claim 1, characterized in that: The web plate of the steel secondary beam and the ear plate of the steel main beam are connected by bolt welding through a connecting plate.

4. A method for constructing a roof under restricted conditions according to claim 1, characterized in that It includes the following steps: Step 1: First construct the equipment foundation in the public auxiliary room, reserve the dowels for the concrete columns in advance, and clean up and hand over after the strength is reached, and the civil engineering team withdraws; Step 2: Equipment professionals come to the site to assemble large equipment, hoist it into place as a whole, cover it with three-proof cloth, and take waterproof, dustproof, anti-corrosion and other finished product protection measures; Step 3: After the equipment is in place, the civil engineering department will continue to construct the double-row reinforced concrete columns and the reinforced concrete main beams on the outside of the roof. The embedded parts of the structural columns will be reserved on the indoor side according to the design requirements for the connection between the steel main beams and the concrete columns; Step 4: Install the steel main beam. The web of the steel main beam is connected to the embedded parts on the concrete column through connecting plate bolt welding. The upper and lower flange plates of the steel main beam are not welded, and are hinged structures. Step 5: Install the steel secondary beams. Set the steel secondary beams between the steel main beams. The web plates of the steel secondary beams are connected to the ear plates of the steel main beams by bolt welding through the connecting plates to form an articulated structure. Step 6: Install the floor slab, the floor slab support is continuously set on the steel beam, and bolts are set on the steel beam to connect with the floor slab; Step 7: Lay the roof panel reinforcement and pour concrete or directly pour concrete according to the design; then carry out wall construction, roof waterproofing, and decoration and renovation.

5. The method for constructing a roof under restricted conditions according to claim 1, characterized in that: The floor slabs of the roof are made of corrugated steel sheets or reinforced steel truss slabs.

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