CN116677210A - An installation process of a support frame applied to the construction of a prefabricated steel structure floor - Google Patents

Abstract

The invention discloses an installation process of a support frame applied to the construction of a prefabricated steel structure floor slab, comprising the following steps: A. Construction preparation; first, check the table to determine the number of support frames; then manufacture the support frame in a factory, and conduct quality inspection ; B. adjust and fix the applicable length of the support frame on site; adjust and fix the length of the support frame according to the span between the two steel frame beams; D. Arrange the connecting pendant on the steel frame beam; put the connecting pendant on the upper flange of the steel frame beam; E. Weld the connecting pendant and the steel frame beam. The support frame has the characteristics of being scalable and free from landing, so its construction technology has the characteristics of quick installation and disassembly.

Description

An installation process of a support frame applied to the construction of a prefabricated steel structure floor

technical field

The invention relates to the field of general building structure connection, in particular to an installation process of a support frame applied to the construction of an assembled steel structure floor.

Background technique

The floor construction of a multi-storey steel structure building starts from the bottom layer and goes up layer by layer. Before the concrete pouring of each floor, the construction site uses steel pipe scaffolding combined with temporary formwork or permanent formwork for support. The temporary support of floor-to-ceiling steel pipe scaffolding has a long erection period and cumbersome erection process, and the erection process is limited by the time for the concrete pouring and maintenance of the lower floor to be completed, which restricts the construction efficiency of the steel structure building; Support erection costs and risks will be greatly increased.

For example, the application number is 201610698234.7 for a quick disassembly and assembly method of a truss-type formwork support system. The present invention first makes truss chords, combined end plates, section steel connectors and steel beams; the combination end plates are provided with bolt holes and section steel connectors It includes horizontal plates, vertical plates and middle plates fixed to each other, and connecting holes are opened on the horizontal plates and vertical plates respectively; the truss chord is fixed with the combined end plate by welding, and the combined end plate is connected to the steel connector by quick release bolts Above, the steel connectors are installed on the steel beams through the installation bolts; when installing, install the steel connectors on the steel beams, then hoist the steel beams, and then install the combined end plates together with the truss chords on the steel connectors superior. In this construction method, the support system and the steel beam are connected by bolts, and holes need to be opened on the steel beam, which will affect the strength of the steel beam.

In view of the above problems, the present invention uses another design idea to design a support frame installation process applied to the construction of fabricated steel structure floors, and this case arises from this.

Contents of the invention

The invention provides an installation process of a support frame applied to the construction of a prefabricated steel structure floor. The support frame has the characteristics of being scalable and free from landing, so its construction process has the characteristics of fast installation and disassembly; specifically, the present invention is Achieved through the following technical solutions:

An installation process for a support frame applied to the construction of a prefabricated steel structure floor slab, comprising the following steps, A, construction preparation; first look up the table to determine the quantity of the support frame; then manufacture the support frame in the factory, and carry out quality inspection; B, Adjust and fix the applicable length of the support frame on site; adjust and fix the length of the support frame according to the span between the two steel frame beams; C. The connecting pendant is connected with the support frame; the connecting pendant is respectively installed at both ends of the support frame; D. The connecting pendant is arranged on the steel frame beam; the connecting pendant is placed on the upper flange of the steel frame beam; E, the connecting pendant and the steel frame beam are welded.

In the above construction method, the strength of the steel beam structure will not be damaged. The connection is more stable by welding.

Further, in another scheme or step C is placed before step E.

Further, the supporting frame includes a middle section truss and an end section truss, the two ends of the middle section truss are respectively connected with the end section truss, and the connecting pendant is installed on the end section truss for connecting with the floor; the middle section truss includes the upper chord , the lower chord and the tie rod, the tie rod connects the upper chord and the lower chord, grooves are arranged in the upper chord and the lower chord; the end section truss includes the upper chord, the lower chord and the tie rod, the tie rod connects the upper chord and the lower chord; the end section The upper and lower chords of the truss are respectively assembled in the grooves of the upper and lower chords of the middle truss, and the end trusses can move relative to the middle truss.

The supporting truss is composed of three sections, and the connection length of the middle section truss and the end section truss can be adjusted to adapt to different floor spans. Both ends of the supporting truss are supported on the upper flange of the steel beam by screws and are reliably connected. Temporary formwork or permanent formwork is laid on the support truss to provide a reliable temporary support system for the construction phase of the reinforced concrete floor. The retractable temporary support system free from landing is suitable for different types of floor slabs of steel structure buildings, leaving a large free space for the lower part of the floor slab, which is convenient for multi-type construction and speeds up the construction progress.

Further, the connecting hanger includes a screw rod, the screw rod includes a first rod segment and a second rod segment, and the two rod segments are vertically connected.

Further, in the middle section truss, several positioning holes are arranged along the axis of the beam in the upper chord and the lower chord; in the end section truss, several positioning holes are arranged in the upper chord and the lower chord along the axis of the beam ; Locating pins or locating bolts pass through the locating holes of the two trusses to realize the connection between the middle truss and the end truss.

According to the span of the floor, determine the scope of application of the telescopic, determine the modulus of length adjustment, and adjust the modulus by uniformly arranging the hole positions at different positions on the side of the truss chord beam at intervals of 50mm; at the same time, the ends are set in the form of oblong holes to adjust the support Any spacing that can cover the adjustable range. After the adjustment is completed, determine the fixing method, and use pins to pass through the two sections of upper and lower string positioning holes.

Further, in step B, the middle section truss and the end section trusses are fixedly connected through the positioning holes by using positioning pins or positioning bolts, so as to realize on-site adjustment and fix the applicable length of the support frame.

Further, in step C, the first rod section of the screw passes through the through hole in the truss of the end section, the height of the second rod section of the screw relative to the upper chord is adjusted, and the screw and the upper chord are locked and fixed by a nut.

The screw rods are pre-installed at both ends of the truss support. When installed on site, the entire truss support can be directly hung on the upper flange of the steel beam by means of the screw rods, and then can be easily and reliably welded and fixed.

Utilizing the good weldability of the upper flange of the steel beam, it is safe and reliable, and the installation efficiency is high. At the same time, the design and construction requirements of different elevations of the floor can be realized by adjusting the length of the screw.

Further, in step D, the second rod section of the screw rod rides on the upper flange of the steel frame beam in the floor slab.

Further, the step of disassembling the supporting frame from the steel frame beam is to loosen the nuts on the screw rods, and separate the end section truss from the screw rods.

The support frame in this scheme is characterized by light weight of temporary support, scalable and adjustable length, using the upper flange of the steel beam as a support point to realize the function of avoiding landing, providing reliable temporary support for the construction stage of the floor slab, and solving the problem of steel structure buildings. The construction efficiency of floor-to-ceiling scaffolding does not match the steel structure, which can be widely used. The new type of floor-free retractable temporary support can be applied to steel structure buildings such as reinforced truss floors, laminated slabs, profiled steel plates, and fully cast-in-place slabs.

Description of drawings

Fig. 1 is the perspective view of a kind of support frame embodiment provided by the present invention;

Fig. 2 is the front view of a kind of support frame embodiment provided by the present invention;

Fig. 3 is a front view of an embodiment of an intermediate section truss provided by the present invention;

Fig. 4 is a side view of an embodiment of a mid-section truss provided by the present invention;

Fig. 5 is a front view of an embodiment of an end section truss provided by the present invention;

Fig. 6 is a perspective view of an embodiment of an end section truss provided by the present invention;

Fig. 7 is a schematic diagram of an embodiment of the assembly of an end section truss and a middle section truss provided by the present invention;

Figure 8 is a partially enlarged view of Figure 7;

Fig. 9 is a schematic diagram of the installation of a connection pendant provided by the present invention;

Fig. 10 is a perspective view of an embodiment of a reinforcement provided by the present invention;

Figure 11 is a schematic diagram of the installation of a connecting pendant and a steel frame beam provided by the present invention;

Figure 12 is a schematic diagram of the installation of a support frame and a steel frame beam provided by the present invention;

FIG. 13 is a partially enlarged view of FIG. 12 .

Among them: 1. Intermediate truss; 11. Upper chord; 12. Lower chord; 13. Tie rod; 14. Groove; 15. Positioning hole; 16. Positioning hole; 2. End truss; 21. Upper chord; 22 .Bottom chord; 23. Tie rod; 25. Positioning hole; 26. Positioning hole; 27. Through hole; 28. Reinforcement; 3. Connecting pendant; 31. Screw; ; 32. Nut; 4. Locating pin; 5. Steel frame beam.

Detailed ways

Preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the scope of the present invention to those skilled in the art.

In the following description, for the purposes of illustrating various embodiments of the invention, certain specific details are set forth in order to provide a thorough understanding of the various embodiments of the invention. However, one skilled in the relevant art will recognize that the embodiments may be practiced without one or more of these specific details. In other instances, well-known devices, structures and techniques associated with the present disclosure may not have been shown or described in detail, so as not to unnecessarily obscure the description of the embodiments.

Unless the context requires otherwise, throughout the specification and claims, the word "comprise" and variations thereof, such as "comprising" and "having" should be read in an open, inclusive sense, i.e., should be interpreted as "comprising, but not limited to".

Reference throughout this specification to "one embodiment" or "some embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiments is included in at least one of the embodiments. In addition, particular features, structures or characteristics may be combined in any manner in one or more embodiments.

In addition, terms such as first and second used in the specification and claims are only used to distinguish various objects for the sake of clarity of description, and do not limit the size or other order of the objects described therein.

As shown in Figure 1 and Figure 2, a floor-to-ceiling scalable support frame applied to the construction of prefabricated steel structure slabs, including the middle section truss 1 arranged in the middle and the end section truss 2 arranged at both ends, the middle section truss The two ends of 1 are respectively connected with the end truss 2, the end truss 2 can move relative to the middle truss 1, and the moved end truss 2 is then fixed with the middle truss 1, thereby adjusting the overall length of the entire support frame .

1. Middle section truss 1.

As shown in Fig. 3 and Fig. 4, the middle truss 1 is a double truss, which includes an upper chord 11, a lower chord 12 and a tie rod 13; in the upper chord 11 and the lower chord 12, a Groove 14, the groove 14 is used to assemble the end section truss 2; the length of the upper chord 11 is longer than the length of the lower chord 12, the upper chord 11 and the lower chord 12 are arranged in parallel, and the grooves 14 of the upper chord 11 and the lower chord 12 are opposite , the tie rods 13 are arranged between the upper chord 11 and the lower chord 12 in a wavy manner, and are used to connect the two. Between the two sets of tie rods 13 is used to accommodate the end section trusses 2 . Wherein the upper chord 11 is made of cold-formed inner crimped channel steel, the lower chord 12 is made of cold-formed deep groove C-shaped steel, and the tie rod 13 is made of round steel.

In the upper chord 11, several positioning holes 15 are arranged along the axis of the beam; in the lower chord 12, one positioning hole 16 is arranged.

The positioning hole 15 is in the shape of an oblong hole, and the positioning hole 16 is in the shape of a circular hole.

Second, the end section truss 2.

As shown in Figures 5 and 6, the end section truss 2 is a single truss, comprising an upper chord 21, a lower chord 22 and a tie rod 23, the length of the upper chord 21 is longer than the length of the lower chord 22, and the upper chord 21 and the lower chord 22 are arranged in parallel, and the tie rods 23 are arranged between the upper chord 21 and the lower chord 22 in a wave-shaped manner for connecting the two, and one set of tie rods 23 is provided. Upper chord 21 adopts square steel pipe to make, lower chord 22 adopts flat steel to make, and pull bar 23 adopts round steel to make.

In the upper chord 21, a positioning hole 25 is arranged; in the lower chord 22, several positioning holes 26 are arranged along the axis of the beam.

The positioning hole 26 is in the shape of an oblong hole, and the positioning hole 25 is in the shape of a circular hole.

In another embodiment, the end of the lower chord 22 is bent and connected to the upper chord 21 , and the tie rod 23 is arranged between the upper chord 21 and the lower chord 22 for connecting the two.

As shown in Figure 7 and Figure 8, the end section truss 2 is assembled with the middle section truss 1, the upper chord 21 of the end section truss 2 is set in the groove 14 of the middle section truss 1 upper chord 11, and the end section The lower chord 22 of the truss 2 is set in the groove 14 of the lower chord 12 of the middle truss 1. According to the requirement of the span length, adjust the overlapping length of the end truss 2 and the middle truss 1, and then place the two upper chords The positioning holes in the two lower chords are aligned, the positioning pin 4 or the positioning bolt passes through the aligned positioning holes, and the end section truss 2 and the middle section truss 1 are fixedly connected to ensure the overall length of the support frame during use. fixed.

3. Connect the pendant 3.

As shown in FIG. 9 , the end of the top chord 21 in the end section truss 2 is provided with a connecting hanger 3 for connecting with the steel frame beam 5 in the floor slab. The connecting hanger 3 includes a 7-shaped screw rod 31, and the 7-shaped screw rod 31 includes two sections, respectively a first section 311 and a second section 312, and the two sections are vertically connected. The connection mode between the connecting pendant 3 and the end section truss 2 is as follows:

As shown in Fig. 9 and Fig. 10, in the end section truss 2, the end of the upper chord 21 is welded with a reinforcement 28, which is used to increase the thickness of the end of the upper chord 21 and strengthen the strength of the end. The reinforcement 28 can be It is a steel plate; at the same time, a through hole 27 penetrating up and down is provided at the end, the through hole 27 is perpendicular to the axis of the upper chord 21, the through hole 27 also runs through the reinforcement 28, and the first rod section 311 of the 7-shaped screw 31 passes through The 7-shaped screw rod 31 and the upper chord 21 are locked and fixed through the through hole 27 and two nuts 32 respectively arranged on the upper and lower sides of the upper chord 21 . The height of the second section 312 of the 7-shaped screw 31 relative to the upper chord 21 can be adjusted by adjusting the nut 32, so as to meet the design and construction requirements of different elevations of the floor.

After the 7-shaped screw 31 is connected, the second segment 312 of the 7-shaped screw 31 is parallel to the axis of the upper chord 21 .

As shown in Fig. 11, Fig. 12 and Fig. 13, during use, according to the span length requirements between the two steel frame beams 5, the overall length of the support frame is adjusted and fixed, and the second pole section 312 of the 7-shaped screw rod 31 Take the upper wing plate of the steel frame beam 5 in the floor deck, and then weld and fix the 7-shaped screw rod 31 and the steel frame beam 5. During disassembly, only the nut 32 needs to be removed, thereby separating the 7-shaped screw rod 31 from the end section truss 2, and then the entire support frame can be removed, while the 7-shaped screw rod 31 is connected with the steel frame beam 5.

Fourth, the construction and installation process of the support frame.

(one)

Step A, construction preparation.

First check the table to determine the number of support frames; then manufacture the support frames in the factory and conduct quality inspection.

Step B, adjust and fix the applicable length of the support frame on site.

According to the span between the two steel frame beams 5, the length of the support frame is adjusted, and then the positioning pin 4 is used to fix and connect the middle section truss 1 and the end section truss 2.

Step C, the support frame is connected with the 7-shaped screw 31, and the height of the 7-shaped screw 31 is adjusted.

A 7-shaped screw 31 is installed at the end of the end section truss 2 , the height of the 7-shaped screw 31 relative to the upper chord 21 is adjusted, and then locked and fixed by a nut 32 .

Step D, arranging a 7-shaped screw rod 31 on the steel frame beam 5 .

The second bar section 312 of the 7-shaped screw rod 31 on the support frame rides on the upper wing plate of the steel frame beam 5 in the floor deck, and the support frame is hung between the two steel frame beams 5 at this moment.

Step E, welding the 7-shaped screw rod 31 and the steel frame beam 5 .

The second section 312 of the 7-shaped screw 31 is welded together with the upper wing plate of the steel frame beam 5 .

Step F, making the floor slab.

Arrange wooden stalls on the support frame and lay formwork; then bind the floor reinforcement; pour the floor concrete and maintain it.

Step G, remove the support frame.

Loosen the nut 32 on the 7-shaped screw rod 31, separate the end section truss 2 from the adjustment 7-shaped screw rod 31, the 7-shaped screw rod 31 is still connected with the steel frame beam 5, but the support frame is removed from the steel frame beam 5 Leave.

(two)

Alternatively, step C is placed after step E, that is, the 7-shaped screw rod 31 is welded to the steel frame beam 5 first, and then the 7-shaped screw rod 31 is connected to the support frame.

The specific steps are as follows:

Step A, construction preparation.

First check the table to determine the number of support frames; then manufacture the support frames in the factory and conduct quality inspection.

Step B, adjust and fix the applicable length of the support frame on site.

According to the span between the two steel frame beams 5, the length of the support frame is adjusted, and then the positioning pin 4 is used to fix and connect the middle section truss 1 and the end section truss 2.

Step D, arranging a 7-shaped screw rod 31 on the steel frame beam 5 .

The second rod section 312 of the 7-shaped screw rod 31 on the support frame rides on the upper wing plate of the steel frame beam 5 in the floor board.

Step E, welding the 7-shaped screw rod 31 and the steel frame beam 5 .

The second section 312 of the 7-shaped screw 31 is welded together with the upper wing plate of the steel frame beam 5 .

Step C, the support frame is connected with the 7-shaped screw 31, and the height of the 7-shaped screw 31 is adjusted. .

A 7-shaped screw 31 is installed at the end of the end section truss 2 , the height of the 7-shaped screw 31 relative to the upper chord 21 is adjusted, and then locked and fixed by a nut 32 .

Step F, making the floor slab.

Arrange wooden stalls on the support frame and lay formwork; then bind the floor reinforcement; pour the floor concrete and maintain it.

Step G, remove the support frame.

Loosen the nut 32 on the 7-shaped screw rod 31, separate the end section truss 2 from the adjustment 7-shaped screw rod 31, the 7-shaped screw rod 31 is still connected with the steel frame beam 5, but the support frame is removed from the steel frame beam 5 Leave.

Unless otherwise specified in the description of the present invention, all are conventional techniques in the art.

The above is the preferred implementation mode of the present invention, and several other simple replacements and changes made under the premise of the concept of the present invention should be regarded as belonging to the protection scope of the present invention.

Claims (9)

1. The utility model provides a be applied to mounting process of support frame of assembled steel construction floor construction which characterized in that: comprises the steps of,

A. preparing construction;

firstly, looking up a table to determine the number of the supporting frames; then manufacturing a supporting frame in a factory, and carrying out quality inspection and acceptance;

B. adjusting and fixing the applicable length of the support frame on site;

adjusting and fixing the length of the support frame according to the span between the two steel frame beams;

C. the connecting hanging piece is connected with the supporting frame;

connecting hanging pieces are respectively arranged at two ends of the supporting frame;

D. arranging connection hanging pieces on the steel frame beams;

the connecting hanging pieces are put on the upper flanges of the steel frame beams;

E. and welding and connecting the hanging pieces and the steel frame beam.

2. The mounting process of the support frame applied to the construction of the assembled steel structure floor slab according to claim 1, wherein the mounting process comprises the following steps of: or step C is placed before step E.

3. The mounting process of the support frame applied to the construction of the assembled steel structure floor slab according to claim 1 or 2, wherein the mounting process comprises the following steps of: the support frame comprises a middle section truss and an end section truss, wherein two ends of the middle section truss are respectively connected with the end section truss, and the connecting hanging piece is arranged on the end section truss and used for being connected with a floor slab; the middle-section truss comprises an upper chord, a lower chord and a pull rod, the pull rod is connected with the upper chord and the lower chord, and grooves are formed in the upper chord and the lower chord; the end section truss comprises an upper chord, a lower chord and a pull rod, and the pull rod is connected with the upper chord and the lower chord; the upper chord member and the lower chord member of the end section truss are respectively assembled in the upper chord member groove and the lower chord member groove of the middle section truss, and the end section truss can move relative to the middle section truss.

4. A process for installing a support frame for use in fabricated steel structure floor construction according to claim 3, wherein: the connecting hanging piece comprises a screw rod, the screw rod comprises a first rod section and a second rod section, and the two rod sections are vertically connected.

5. A process for installing a support frame for use in fabricated steel structure floor construction according to claim 3, wherein: in the middle section truss, a plurality of positioning holes are arranged in the upper chord member and the lower chord member along the axis of the beam; in the end section truss, a plurality of positioning holes are arranged in the upper chord member and the lower chord member along the axis of the beam; the locating pins or the locating bolts penetrate through the locating holes of the two trusses and are used for connecting the middle section truss and the end section truss.

6. The mounting process of the support frame applied to the construction of the assembled steel structure floor slab, which is characterized in that: in the step B, the middle section truss and the end section truss are fixedly connected through the positioning holes by using the positioning pins or the positioning bolts, so that the on-site adjustment is realized, and the applicable length of the support frame is fixed.

7. The mounting process of the support frame applied to the construction of the assembled steel structure floor slab, which is characterized in that: in the step C, the first rod section of the screw rod penetrates through the through hole in the truss of the end section, the height of the second rod section of the screw rod relative to the upper chord member is adjusted, and the screw rod and the upper chord member are locked and fixed through the nut.

8. A process for installing a support frame for use in fabricated steel structure floor construction according to claim 3, wherein: in step D, the second leg of the screw is lapped over the upper wing plate of the steel frame beam in the storey deck.

9. The mounting process of the support frame applied to the construction of the assembled steel structure floor slab, which is characterized in that: the step of detaching the support frame from the steel frame beam is to unscrew nuts on the screw rods and separate the end section truss from the screw rods.