KR0150304B1 - A method of simultaneously constructing frameworks for floors and basements of a building - Google Patents

Abstract

The present invention relates to a method for constructing a structure of a building structure, in which the construction of a frame of a building structure consisting of a basement layer and a ground layer as a steel reinforcement concrete structure, after completion of the earthworks, a steel frame and deck plate (deck plate) construction At least two floors above ground and at least one basement level are completed, the ongoing construction of steel frame and deck plate or frame construction of the basement floor continues to the upper floor in the same way. In addition, the construction of the ground floor frame is also carried out simultaneously from the ground floor pillars in order to shorten the frame construction air and increase the efficiency of resource operation.

Description

Parallel construction method of ground and basement frame of building structure

Figure 1 (a) is a schematic process diagram of the process according to the invention.

(b) is a construction state step by step of the process according to the invention.

2 (a) is a plan view showing the installation state of the aerial work platform.

(b) is a cross-section of a public work bench,

(c) a photograph of the site of the construction site where the public work platform is installed,

3 (a) is a photograph showing the installation state of the auxiliary rebar,

(b) is a photograph showing the installation of the formwork (8) below the first-floor column,

(c) is a longitudinal cross-sectional view of the lower part of the first-floor column with the rebar and formwork installed,

(d) is a picture of the actual construction state of the lower part of the first-floor column with the rebar and formwork installed.

Figure 4 (a) is a frame construction progress step of the construction method according to the invention,

(b) is a photograph showing the site view of the building under construction in accordance with the construction method of the present invention,

5 (a) is a schematic process diagram of a conventional netting method,

(b) is a construction state diagram for each step of the conventional net perforation method,

6 (a) is a schematic process diagram of a conventional reverse drilling method,

(b) is a construction state diagram for each process step of the conventional reverse drilling method.

* Explanation of symbols for the main parts of the drawings

1: aerial temporary workbench 2: steel column

3: girder 4: beam bracket

5, 5a: single tube five 6: panel

7: auxiliary reinforcing bar 8: 1st floor pillar

9: freckle 10: hoop

11: brace 12: tie wire

A: End position of 1st floor pillar B: Top position of 1st floor floor slab

The present invention relates to a frame construction method of a building structure, and in particular, in the construction of high-rise buildings by simultaneously pushing the frame construction at the two points of the basement floor and ground floor or lower floor and the upper floor at the same time to shorten the frame construction air as well as improve the efficiency of resource operation It relates to a frame construction method of building structures to increase.

In general, building structures are completed through foundation work, framing work, and finishing work. The double frame construction is the most important work in the construction cost and air of the building, that is, the height of the construction cost or the long and short of the construction cost is critically determined by the economic efficiency and efficiency of the frame construction. In particular, in the air of construction, framing is a very important element that corresponds to a critical path, and the more important the building becomes, the more important it becomes.

In this framework, steel frame or reinforcing steel assembly and concrete casting are the main processes. Since the frame itself must support its own weight, it is a principle and aptitude to construct it from the lower floor to the upper floor of the building. In other words, it is common to proceed with the frame construction in the order of foundation, basement, ground and roof. Such a method is usually called a net working method and has been mainly used. A schematic process diagram of the netting method is shown in (a) in FIG. 5, as shown in FIG. 5, after the underground work is completed, the steelwork is carried out to some extent, and at the same time (sometimes after the completion of the steel work) It is a construction method to complete and proceed with the ground concrete construction. In order to make this process easier to understand, FIG. 5 (b) schematically shows the construction state for each process step.

On the other hand, in the general frame construction, the underground floor construction is not only long, but the air per floor is usually about 1 month, and the work progress is intermittent due to the interference and curing problems of the underground struts. Although it is usually short for one week, the efficiency of resource operation such as equipment and manpower is low, and the roof layer construction is the last to be completed in the sequence.

Therefore, in the above-mentioned conventional netting method, in which the layers are constructed in order from the lowermost floor of the basement to the upper floor, prolongation of the construction period becomes inevitable as a whole, and also due to the difference in the construction volume of the basement and the ground floor and the work interruption of the basement floor, There is an inherent problem of extremely low resource efficiency.

As a method for solving the problem of the net punching method to some extent, there is a back-down method (top-down method), which is shown in Figure 6 (a) and (b) in the same manner as compared to the net punching method. As can be easily seen from the drawing, this reverse perforation method is a method of constructing a ground frame construction on the ground floor, and then simultaneously performing underground earthworks, underground concrete works, and ground concrete works in parallel. This reverse drilling method has the advantage of shortening the air and increasing the efficiency of resource operation to some extent, but it is rather difficult to use because there are many disadvantages derived from it. That is, the underground wall construction must be a slurry wall method. There are limitations, and in the underground construction, the working environment is poor and the verticality management is difficult, and there is a considerable difficulty, and the overall increase in construction costs is inevitable.

Accordingly, the present invention is to solve the problems of the conventional frame construction method as described above, without additional problems such as generating a separate construction cost or a certain limitation in the application of the construction method, such as the reverse drilling method, resources Its purpose is to provide a method of framing construction of building structures that increases operational efficiency and significantly shortens air, thus significantly reducing construction costs as a whole.

Frame construction method of the building structure according to the present invention for achieving the above object, in the construction of the frame of the building structure consisting of a predetermined basement layer and the ground layer in a steel reinforced concrete structure, after completion of the underground earthwork steel and deck When the construction of the deck plate has been carried out to at least 2 stories above the ground and the framework has been completed at least 1 basement level, the construction of the steel frame and deck plate or the basement of the basement under construction is the same. While proceeding to the upper floor in the manner, while simultaneously proceeding with the construction of the ground floor at the same time from the first floor of the ground, which corresponds to the middle floor of the entire floor of the building, the frame construction of the first floor above the ground, Along the girder, install a temporary construction work platform using beam brackets and short pipes. In order to prevent the reinforcing bar and hoop reinforcement, the auxiliary reinforcing bar is fixed to the first floor column by welding so that the reinforcing bar is supported to the secondary reinforcing bar. After the formwork is closely installed so that the concrete does not leak, it is completed by reinforcing the assembly of the formwork, the formwork and concrete pouring, etc. according to a conventional method, and the framework after the second floor above ground is characterized in that proceeding in the usual way.

Frame construction method of the building structure configured as described above was named in the present invention a two-stage method or a double up method in a similar naming method as the conventional method, this construction method configured as described above Since, at the same time, the basement structure and ground layer frame construction are simultaneously promoted simultaneously, the air is significantly shortened compared to the conventional construction method which proceeds sequentially, and the continuous work can be continuously performed without discontinuity of work, so that an appropriate amount of work can be continuously secured. Not only can you effectively manage your workforce. One-time operation of the equipment has the advantage that the operation efficiency of the equipment can be increased, such as allowing the concrete and ground to be poured simultaneously.

On the other hand, when continuing the basement frame construction and finally connecting to the lower ground pillars, there is a problem that it is difficult to tightly fill the ready-mixed concrete in this connection. By forming the first floor floor slab to be located between the upper surface and the lower surface, it is possible to ensure a sufficient filling with the proper compaction when placing the first floor floor slab in the future.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 conceptually illustrates a method for constructing a frame according to the present invention in order to make it easier to understand in comparison with FIGS. 5 and 6 showing a conventional method. FIG. Figure 1 is a schematic process diagram of the construction method, Figure 1 (b) is a schematic diagram showing the construction state of each process step of the construction method according to the present invention, as shown, the construction method of the frame according to the present invention, a predetermined basement layer and ground layer When constructing the frame from the structural structure of steel frame with reinforced concrete structure, after the steel frame work to some extent, the ground concrete work and the underground concrete work are carried out simultaneously, that is, the ground frame work and the underground frame work at some point It is the construction method to push in parallel.

However, in the construction of concrete structures such as concrete placing after assembling steel frame and deck plate, the ground frame construction cannot be undertaken without the underground frame construction. At this point, the ground frame construction can be done in parallel. This parallel point is the time when the construction of the steel frame and deck plate after the completion of the subterranean earthwork to at least two floors above the ground, preferably about 3-4 floors, the basement of the basement floor and at least one underground floor The frame construction should be after the completion point. The former point is natural because the steel can be assembled before the concrete can be placed. The latter point is sufficient to withstand the subsequent construction load by constructing the steel structure to a certain level. To make it work.

In addition, if the construction is to be carried out in parallel for the purpose of simply shortening the air, it is not necessary to have the first floor for the number of floors that start the ground frame construction in parallel, but rather, it is desirable to set the floor to half the construction volume of the upper and lower frames. However, in general, the air per floor of the basement floor is about four times the air per floor of the ground floor, so even if the ground frame construction starts from the first floor, the upper and lower air will not only be similar, but also the frame construction of the parallel starting floor. Since it is necessary to install a separate construction work platform, etc. In consideration of the convenience of various work and considering the safety of construction, it is most preferable to start the ground frame construction from the first floor as in the present invention.

On the other hand, in the process after the time when the basement and the ground-floor construction work together, other constructions can be carried out in the same way, but in the construction of the ground-floor construction of the ground floor, the framework of the pillars and slabs of the lower floor is not yet completed. Because of this, a separate aerial work platform is required, and a unique configuration is required to prevent the reinforcing bars or poured concrete from flowing down when installing the formwork of the first-floor column and assembling the reinforcing bars.

As an alternative to the above-mentioned public temporary work platform, a single pipe scaffold or frame scaffold may be installed for each column from the lower basement floor, and in this case, excessive input of materials and manpower is inevitable, It is not preferable at all for the purposes of the present invention because problems such as difficulty in movement are greatly reduced and problems such as interference with the underground frame work are caused and work is inconvenient.

In order to prevent such a problem from occurring, the present invention provides an aerial construction work bench as shown in FIG. 2 as an example. FIG. 2 (a) is a plan view showing the installation state of the aerial work bench, and FIG. b) is a cross-sectional view of the construction work platform, and FIG. 2 (c) is a photograph of the actual construction site where the construction work platform is installed. As shown, the aerial work bench 1 according to the present invention is installed along a beam or girder 3 so as to pass through each other between the first-floor steel pillars 2 above the girder. 3) Fix and assemble the short pipe pipe 5 using beam brackets 4 at several places, and install the horizontal part of the workbench by laying the panel 6, and connect the short pipe pipe 6a at both ends of the horizontal part. It is made by vertically assembling the railing of the workbench. These aerial work platforms are independently supported by the air without relying on the lower floors to solve interference problems with underground structures, secure the reinforcing bars and formwork of columns, and make it easy with simple materials and less manpower. It can be constructed so that it does not incur additional additional costs.

In addition, since the lower pillar of the first floor is in a steel frame in which concrete is not yet poured, the reinforcing bars and concrete will flow down by assembling the reinforcing bars or installing the formwork in the same manner as in the conventional net drilling method. In order to prevent this, the reinforcing bars and formwork of the first-floor column should be specially installed and installed, as shown in FIG. 3.

Figure 3 (a) is a photograph showing the installation state of the secondary reinforcement, by welding the secondary reinforcement (7) to the first-tier column steel frame (2) to be firmly fixed, by giving the hoop reinforcement and the main reinforcement here This will prevent the rebar from falling down. Figure 3 (b) is a picture showing the installation of the lower formwork (8) of the first floor pillar, unlike the prior art to support the pour concrete from the bottom of the column to support the bottom of the first floor girder By forming the formwork with lumber and panels. At this time, the main root (9) of the column is cut to allow the protruding down when the main root assembly.

FIG. 3 (c) is a longitudinal cross-sectional view of the lower part of the one-story column when the reinforcing bars and formwork are installed, and FIG. 3 (d) is a photograph of its actual construction state. As shown in the figure, the reinforcing bars such as the main bar 9 and the hoop 10 are assembled around the steel frame 2, and the formwork 8 is installed on the side surfaces and the lower surfaces by using the materials and panels. The pillar formwork is tightly supported on the surrounding girder by the brace 11 and the tie wire 12 which are installed so as not to slip on the surrounding girder by using a ring or a rolling prevention angle (not shown). The road is kept stable, and further, the main root 9 of the column is projected to protrude downward by the length of the overlap length for future joint with the underground.

In addition, when continuing the basement frame construction and finally connecting both frames together, the first-floor column can be easily filled with the ready-mixed concrete without gaps in the connecting part, even with proper compaction when placing the first-floor floor slab. In the case of concrete pouring, the lower end position (A) of the pillar may be formed to be located below the upper surface position (B) of the first floor floor slab to be poured later, preferably about 5 cm below.

In addition, the frame work of the basement floor may be interfered with or interfered with by falling objects during the frame work on the ground floor, and thus, by installing a drop prevention net (not shown) on the bottom part of the first floor, the first floor ceiling slab may be prevented. When the slab is completed, the slab plays a role of replacing the fall prevention net, and thereafter, the fall prevention net is not necessary separately.

After completing the construction of the first-floor frame by installing the aerial work bench, the reinforcing bar and the formwork of the first-floor column as described above, as shown in FIG. The construction is to proceed to the upper floor in both the basement and ground direction. Figure 4 (b) is a photograph showing the site view of the building under construction by the construction method according to the present invention for reference, the framework of the ground floor is completed from the ground floor pillars to the seventh floor, the basement is not shown However, concrete pouring to the second basement level is shown, and it can be seen from this that frame construction of the ground floor and the basement floor can be completed at about the same time.

On the other hand, the construction method of the present invention, as can be easily seen from the above description, is a construction method that can be applied to the structure of the steel frame reinforced concrete structure of the building structure consisting of a predetermined basement and ground layer. In the structure of such a structure, if the reinforced concrete portion of the column is designed so that there is no stress burden (for fireproof coating), it is possible to apply the method of the present invention without any problem as usual, but to have a stress burden on the reinforced concrete portion of the column If it is designed, it is necessary to supplement or adjust the steel member so as to respond appropriately to the construction load. This latter case can be easily solved by appropriately adjusting the cross-section of the steel member or installing a reinforcing material, and in most cases, there is almost no structural load due to little loading load during construction. In fact, it is quite widely applicable.

Effects of the frame construction method according to the present invention configured as described in detail above are as follows.

First is the effect of air shortening. It is a natural consequence of the process of simultaneously promoting the basement frame construction and the ground structure at the same time, the overall frame construction period can be significantly shortened compared to the conventional netting method, the higher the building, the greater the effect is, of course. In addition, the method according to the present invention has the advantage that there is no additional cost burden as in the conventional reverse punching method.

Second, resource utilization efficiency of human resources and equipment is increased. In other words, since the work is not interrupted as a whole and proceeds continuously, it is possible to continuously secure an appropriate amount of work so that the manpower can be efficiently managed. Therefore, the phenomenon known as Demachi occurs due to the intermittent work of the underground work. There is no fear of becoming. In addition, since the ready-mixed concrete can be placed on the ground and the basement at the same time, the operation efficiency of the equipment is increased.

Third, the site's safety management is easy. In order to prevent the occurrence of disasters caused by falling objects in the upper part of the construction of high-rise building, the fall prevention net is usually installed, in the method of the present invention, once the first floor ceiling slab is completed, since the slab performs the function of the solid fall prevention net from then on, The safety of construction is increased, which is very beneficial in safety management.

Fourth, it is possible to secure yard spaces. Ordinary materials required for construction, such as a certain amount to be loaded on the construction site to be used in a timely manner if necessary, conventionally required a separate space or warehouse for this, in the present invention, the first floor ceiling slab (two floor floor) is Since it is constructed early, there is an advantage in using this as a necessary material loading space. This is especially true in urban construction where the site is narrow.

Fifth, the burden of complaints will be greatly reduced. Natural consequences of shortening the air, but can be resolved early, such as environmental complaints, and particularly severe traffic complaints in urban construction.

Sixth, the application range is wider than the reverse punching method. The conventional reverse drilling method has a limitation that the earthwork construction method of the underground soil construction as a slurry month method, but there is no such limitation in the present invention, and if the steel reinforced concrete structure can be widely applied without any limitation.

Experimental application of the method according to the present invention, as a result of the above various effects, as shown in the following table, there was an effect of reducing the actual air as well as the construction cost. (The chart below is for building area of 192.68 pyeong, building scale of 5 basement levels and 12 ground levels

Claims (2)

In the construction of the frame of the building structure of the predetermined basement and the ground layer as the steel reinforced concrete structure, after the underground work is completed, the steel frame and the deck plate construction are proceeded to at least 2 stories above the ground. At the time of completing at least one basement level. The ongoing construction of steel frame and deck plate construction or basement frame construction is carried out to the upper layer in the same way, while the construction of the ground layer is carried out simultaneously in order from the first ground column corresponding to the middle floor of the entire building. Promote the construction of the first-floor framing work by installing aerial work benches using gird brackets and short pipes along the girder of the first-floor steel frames, and flowing the main and hoop bars of the first-floor column. In order to prevent the reinforcing bar from being fixed by welding the auxiliary reinforcing bar on the 1st floor column steel frame, if the bottom part of the 1st floor column is supported to support the concrete to be poured from the bottom, close the formwork to prevent the concrete from leaking. After installation, rebar assembly, formwork and concrete placement are performed by the usual methods. Frame construction method of the building structure, characterized in that the completion of the second floor after the ground works in the usual manner. The method according to claim 1, wherein the bottom of the column is to be positioned between the upper and lower surfaces of the first floor slab when placing the first floor concrete.