KR100685147B1 - Construction method for rc structured high rise building - Google Patents

Abstract

A construction method for a reinforced concrete(RC)-structured high rise building is provided to improve quality of a column, a slab, a core, and a stairs structure and reducing the construction cost, while planning reduced construction term and safe work. A construction method for a reinforced concrete(RC)-structured high rise building comprises first through sixth steps. In the first step, a column and a slab(1) are divided into 2~4 sections, a reinforced rod column is arranged and a column system form(15) is installed in a first section, and column concrete is cured. The second step disjoints the column system form after curing the column concrete and transfers the column system form, and installs a slab system form. The third step arranges a slab reinforced rod in the slab system form, and installs electric pipes and facilities. The fourth step casts and cures the concrete in the slab system form. The first through the fourth steps are sequentially performed, thereby forming one layer of the column and slab. The fifth step constructs a core(5) from a lower layer of the slab. The sixth step constructs core stairs(17) from a lower layer of the core.

Description

Construction method for RC structured high rise building with reinforced concrete structure

1 is a plan view for explaining the division and construction sequence of a high-rise building structure having a reinforced concrete structure according to the present invention,

2 to 5 is a cross-sectional view illustrating the construction step of the pillar and slab, core and stairs according to the present invention,

6 is a plan view illustrating a reinforcing bar guide frame capable of reducing the number of jointed points of a vertical reinforcing bar arranged to a core wall by using the present invention.

7 is a cross-sectional view showing the construction step of the core and the core step according to the present invention.

The present invention relates to a construction method for constructing a high-rise building structure provided with a residential space and a core using a reinforced concrete structure, and in particular, an appropriate amount of formwork and reinforcement work per day, such as at least 2 to 4 zones, for one floor of a column constituting the building structure. First preliminary construction by dividing properly in consideration of the appropriate amount of concrete placement per day, and subsequently, one layer of slab is appropriately divided in consideration of the daily mold and reinforcement work amount such as at least 2 to 4 zones and the appropriate amount of concrete placement per day. After the second preliminary construction, the core frame is appropriately divided into 2 to 3 zones according to the daily mold and reinforcement work amount and the concrete casting amount, followed by the subsequent construction, and finally the core stair is sequentially followed on the lower layer where the core frame is completed. By constructing, it induces proper distribution of work and consequently shortens construction time and costs And a method of constructing a high-rise building structure having a reinforced concrete structure capable of improving the quality of columns, beams, slabs, cores, and staircase structures while inducing safety work.

In general, building structures are constructed of reinforced concrete structures (RC structures), steel structures (S structures) and steel and reinforced concrete composite structures (SRC structures). Among these, reinforced concrete structures are developed with the development of high-strength concrete manufacturing and construction technology. Compared to other structures, the cost is relatively low, the material is favorable to fire, and the vibration and noise blocking property is advantageous, so it is frequently applied to the latest buildings which are becoming very large and large. The main structural members of such reinforced concrete structured high-rise building structures generally include cores composed of walls and pillars, beams, and slabs, which consist of walls, including elevators, electrical facilities, facilities, stairs, and toilets. Are summarized as

 Conventional main construction methods of building structures having such reinforced concrete structures include first, core prior construction methods for constructing cores in advance and subsequent construction of columns and slabs; and second, simultaneous construction methods for simultaneously constructing cores, columns, and slabs. There are two things.

When explaining the reinforced concrete construction methods in more detail,

First, in the core preliminary construction method of the building structure with the former reinforced concrete structure, the facilities for core construction such as tower crane, hoist and concrete distributor are installed in the inner space of the core or the outer space of the core. In order to reinforce the reinforcing bar by carrying materials and manpower by using the dedicated facilities for core construction and to bond with a trailing slab, the cores are installed by pre-installing anchor members on the cores, installing system foam, and then placing concrete cores. Pre-construction is done. Later, the column is installed (the column may be placed before the slab, and the concrete may be poured simultaneously with the slab), and the slab reinforcement is connected to the anchor member embedded in the core together with the slab frame member. The concrete slab is then constructed and poured.

The above-described core preceding method is used in the construction of high-rise buildings by operating independently by reducing the amount of load by using a system form to operate independently by preceding the core portion having a relatively high workload.

Second, in the simultaneous construction method for simultaneously constructing the core, the pillar, and the slab of the building structure having the latter reinforced concrete structure, unlike the first construction method, the core, pillar, and slab are constructed at the same time. It does not need to be laid out and also does not require the pre-embedding of anchor members in the core wall, it is relatively advantageous in maintaining proper quality and safety management, and it is the most cost-effective method.

Of the two conventional methods described above,

First, the core preliminary construction method of the building structure with the former reinforced concrete structure requires the construction of core formwork and reinforcement, core crane dedicated facilities such as tower crane for concrete placing, hoist and concrete distributor. First of all, there is a problem that tower cranes must be arranged more than the proper number due to the interference of tower crane operation due to the height of the core, and the interference section due to the core construction facility among the slabs that are subsequently constructed is reinforced with reinforcement bars and The concrete work process is complicated and the safety management is difficult and costly because it is necessary to withhold concrete pouring and dismantle the core construction facility.

In addition, the preceding core is not only narrower than the slab corresponding to the following residential section, but also has difficulty in managing the verticality of the elevator shaft, which is the core of the high-rise building structure by the height difference between the core and the slab. Since the concrete of the slab must be separated and poured, the reinforcing bar connecting the core and the slab must be buried in the wall, causing additional cost and deterioration of the joint quality due to the separate casting.

In addition, the core wall formwork system foam is installed to advance the core.While the wall thickness is usually higher, the wall thickness becomes thinner, whereas it is difficult to modify the core wall formwork system form due to the change of core wall thickness. Due to the tendency to maintain a constant thickness from the low floor to the high floor, there is a problem that a lot of concrete materials compared to the general method.

In addition, the work of the core and slab layers is separated from the top and bottom, making it difficult to manage safety. In particular, various types of work must be performed simultaneously in the vicinity of the preceding narrow core space, resulting in congestion and reduced work efficiency. have.

Second, in the simultaneous construction method for simultaneously constructing the core, column and slab of the building structure having the latter reinforced concrete structure, unlike the first construction method, the core, pillar and slab are constructed at the same time so that the core construction dedicated facility according to the core precedence is arranged. It is the most common method that does not need to be installed in the core wall, and does not need to pre-install anchor member in the core wall, and it is relatively advantageous in maintaining proper quality and safety management, and it does not have much cost burden, but the core, column, and slab work at the same time. The difficulty of securing the working space of the workers occurs as a result of the work gap of the workers occurs as a result there is a limit to shorten the construction period.

In order to solve the problems of the prior art, the present invention is a relatively low cost compared to other structures and advantageous to fire due to the characteristics of the material, the construction of ultra high-rise building structure using a reinforced concrete structure having good vibration and noise blocking properties, The pillars of the building structure are firstly divided into appropriate sections for at least 2 to 4 zones per day and appropriate for reinforcing work for steel and reinforcing concrete, followed by 1st slab layer for at least 2 to 4 zones. Secondly, the core frame is appropriately divided into the appropriate amount of mold and reinforcement work and concrete pouring, and then the core frame is appropriately divided into 2 to 3 zones according to the daily mold and reinforcement amount and concrete pouring amount. By laying the core staircase in order to finally complete the lower layer, It aims to further improve the quality of columns, slabs, cores and staircases and to reduce costs, while inducing proper dispersion and consequently shortening construction period and safety work.

EMBODIMENT OF THE INVENTION Hereinafter, preferred embodiment of this invention is described based on an accompanying drawing.

The present invention is based on the construction of a high-rise building structure using a reinforced concrete structure, the core prior construction method of the building structure having a conventional reinforced concrete structure and the core, column and slab of the building structure having a reinforced concrete structure Unlike the simultaneous construction method of constructing at the same time, it is characterized by constructing the building structure by constructing the pillar first and the slab second, and then successively following the core and the core stairs in order.

1 is a plan view for explaining the division and construction sequence of a high-rise building structure having a reinforced concrete structure according to the present invention,

As shown, in the present invention, one floor of the pillar and the slab 1 of the residential section is constructed using at least four zones (A), (B), (C) and (D) using construction joints (2) and (4). ) Or 2 zones (Ghana), (Dara), etc., suitable for one-day mold and reinforcement work and one-day concrete placing appropriately, neatly divided and constructed sequentially. Here, construction joints are made of wood, steel, plastic in the right place when there is too much concrete to place in one day and it is impossible to finish the concrete within the same day or when it is necessary to break concrete due to the unexpected situation of the construction site. It refers to a temporary partition line that allows concrete to be poured by dividing and dividing sections so that concrete does not leak out when concrete is poured using materials such as concrete.

Each zone of the slab 1 is set in plan in consideration of the daily work volume per process, and the division of the zones in order to construct them in order to provide flexibility and induce continuous repetitive work to realize proper air shortening.

In order to realize the sequential construction and repetitive work of each section of the slab 1, the column or the slab should be basically designed as simple as possible and planned in a proper system form. The system form of the column or slab is well known and will be omitted.

The construction method for each zone is well represented through FIGS. 2 to 5.

Here, one layer of slab (1) can be divided into (A), (B), (C) and (D) zones, and the core (5) can be divided into CORE A using the joint (2) (3) as appropriate. , CORE B, etc., can be divided into 2 to 3 zones according to the proper amount of work and reinforcement for the daily work and reinforcement of concrete, and the trailing of the slab 1 is followed by one step, and the core stair 17 is further down. Trailing in

2 shows the construction of the first day. As can be seen from the figure, in section (a), the column reinforcement 6 is reinforced, the column system foam is installed, and the column concrete 7 is then poured.

3 is a construction step of the second day. As can be seen from the figure, in section (a), the column system foam is dismantled, moved to section (b) and the first day process is installed in section (b).

In this section (a), the slab system foam 13 is lifted and installed.

4 is a construction step of the third day. As shown in the figure, the column system foam of zone (B) is dismantled and moved to zone (C), followed by a second day process of lifting and installing the slab system form 13 in zone (B). In section (c), the first-day process will be constructed.

At this time, in the area (A), the slab reinforcing bars 12 are disposed and at the same time, electricity or facility piping is installed.

5 is a construction step of the fourth day. As shown in the drawing, the column system form of the (C) zone is dismantled and moved to the (D) zone, where the construction of the first day is performed.

In section (c), the slab system foam 13 is lifted and the second day of construction is performed. In (B), slab reinforcing bars 12 are installed, and at the same time, a three-day process is installed by electricity or facility piping.

In addition, in (A), slab concrete (8) is poured into the slab table system form (13) to reach the curing stage to complete one floor of the slab (1), where the process of day 1 is repeated again. In order to do this, it is necessary to fill the columns and walls.

In the present invention, the slab 1 of one layer is completed in the present invention by the above-described four-day process, and this process is performed by zoning in consideration of the workload and continuous sequential progress of each process. By repeating, the slab 1 of the upper layer is constructed.

Meanwhile, in the present invention, as another example of constructing the pillars and the slabs by zones, the pillars and the slab sections may be divided into two zones, such as (Ghana) and (Dara), and the construction steps for each zone are as described above. The description is omitted since it is the same.

This preliminary pre-installation of the columns and slabs provides a relatively wide floor first for more complex subsequent core and stair constructions, enabling safe and versatile site access for the core workers and for the connection between the slabs and the cores. Induces omission of anchor members, facilitates surveying to ensure core verticality, and also enables hoists to move faster and manpower and logistics by running hoists up to the slab layer where concrete is poured, resulting in safer and shorter air. This enables cost reduction while improving the quality of the core-slab connection.

On the other hand, when explaining the construction stage of the core and core stairs,

The core and the core stairs are followed by the slab 1 to construct the core 5 and the core stairs 17 to be further downstream from the bottom. This process is similar to the above-described construction joints (2) and (3). Proper amount of work on formwork and reinforcement for column and slab sections that are pre-constructed by dividing into 2 or 3 zones according to the proper amount of work on formwork and reinforcing steel and reinforcement of concrete, such as CORE A and CORE B The key is to equip the proper amount of concrete to avoid overlapping with the proper amount of daily concrete placement, and to maintain the balance of the overall frame construction. .

Referring to the construction step of the core and core stairs based on Figures 2 to 5,

Day 1 construction step of Figure 2 is a preferred example of properly staggered so as not to overlap with the daily mold and reinforcement work amount and the daily concrete placing amount of the preceding column and slab section, CORE A section in the CORE A section Concrete (9) is poured into the slab and the wall belonging to it, and in the CORE B section, the core vertical reinforcing bar (11) is laid and various embedding work is performed by using the reinforcing bar guide frame (10) on the wall. ) Shows the steps of lifting and fixing, and install slab form corresponding to CORE B section at the same time.

 In the second day construction step of FIG. 3, in the CORE A section, the core vertical reinforcing bars 11 are reinforced using the reinforcing bar guide frame 10 on the wall, and at the same time, the internal system foam 14 is lifted and fixed, and the CORE A The slab foam corresponding to the section is also installed in parallel. In the CORE B section, the slab form remaining work, the remaining reinforcing bars (11), and the various purchases work corresponding to the CORE B section performed on the previous day,

In the third day construction step of FIG. 4, in the CORE A section, the slab foam remaining work and the remaining reinforcing bars 11 corresponding to the CORE A section performed on the previous day and the reinforcement and various purchase operations are performed, and in the CORE B section, the final rebar ( 11) With the completion of reinforcement and various purchases, the system form 15 designed for the shape and structure of the building is installed, and on the other hand, the manpower installation form 16 designed for easy handling by the worker is installed for concrete pouring the next day. Various inspection work and concrete preparation work are done for this purpose.

Day 4 construction step of FIG. 5, in the CORE A section, with the completion of the final reinforcement (11) reinforcement and various purchase operations, install the system form (15) designed to fit the building shape and structure and on the other hand the operator The installation of the manpower installation form 16 designed to facilitate the installation of various inspection work and concrete placement work for the next-day concrete placement, and in the CORE B section to the concrete (9) to the slab and wall belonging to the CORE B section do.

In the present invention, the core 5 of one layer is completed in the present invention by the above-described four-day process, and each core process is performed through the division of the zone and the time difference adjustment in consideration of the pillar and slab workload, which are the preceding processes. This leads to successive sequential progression of the core 5 of the top layer by repeating the process smoothly.

On the other hand, the core vertical reinforcing bar (11) can be used in the length of two layers by installing the reinforcing bar guide frame 10 around the core vertical reinforcing bar, and not reinforcing every layer, but zigzag reinforcing bar every two layers By joining only half, the number of joints can be reduced to half, and the concrete reinforcing method is a type of downward work where the bottom of the core (5) wall is constructed by following one floor above the finished slab (1). This allows workers to easily install rebar.

 This rebar guide frame 10 is preferably composed of a steel pipe 20, a reinforcing material 21, a lifting ring 19, as shown in Figure 6, to form the core wall and to divide the work zone of the core According to the progress of the process after the initial installation, the reinforcement hooks are mounted on the lifting hooks 19 mounted on the reinforcing bar guide frame using the tower crane according to the process after the initial installation. Since the rebar guide frame 10 does not flow down by the grooves formed in the reinforcing bars just by lifting sequentially, there is no need to fix them separately, and the reinforcing material 21 for reinforcing the guide frame is appropriately positioned. By placing them, the position and verticality of the reinforcing bars can be pre-set while preventing the reinforcing bars from being placed in the position of the binding material for joining the system foam in and out of the core wall. It can, and will, which can result in reduced costs and air through a series of these operations.

In addition, as shown in FIG. 7, the core staircase 17 is constructed by successively following the core 5. The core staircase 17 is connected to a vertical wall by using a system foam 14 and 15 to post the one below the one layer of the core 5 using a conventional foam while the wall structure has already been completed. Complex mold construction can be led to simple work. Preferably, the staircase structure is simplified to a one-way slab structure, thereby minimizing wall embedding reinforcing bars for integrating the staircase with the core wall, thereby inducing cost reduction and manpower reduction of the wall embedding reinforcement.

At this time, a temporary staircase 18 is installed on the system foams 14 and 15 above one floor to facilitate movement between the upper and lower floors of the worker, and preferably the hoist is close to the floor of the slab 1 where concrete casting is completed. By smoothly transporting the relevant personnel and materials to be operated, the effect of the present invention can be further exerted.

As can be seen through the embodiments described above, the construction method of the high-rise building structure of the present invention is a method using a reinforced concrete structure, unlike the prior art core construction method, prior to the construction of the slab which is a residential space and the core and By sequentially following the core staircase, the effect of realizing the high-rise building structure more quickly and safely can be obtained.

In addition, according to the present invention can further improve the quality and stability of the slab and core structure.

Claims (4)

In constructing a high-rise building structure in which a living space is provided around the core and its surroundings using reinforced concrete structures, A first step of dividing the pillars and slabs to be pre-cast into at least 2-4 zones, placing the column reinforcement in the first zone of the slab and installing the pillar system foam to pour the pillar concrete; A second step of dismantling the column system foam and sending it to the second zone when the concrete is cured, and installing the slab system foam; A third step of installing slab reinforcement and electrical, facility piping in the slab system foam; A fourth step of pouring and curing concrete into the slab system foam; The first to fourth steps are to construct a single layer of columns and slabs by successive constructions along each zone, and by repeating, to construct the top layer sequentially; A fifth step of constructing the core by following the lower layer of the slab; And A method of constructing a high-rise building structure having a reinforced concrete structure, characterized in that it comprises a sixth step of constructing a core staircase subsequent to the lower layer of the core. The construction of a high-rise building structure having a reinforced concrete structure according to claim 1, wherein the core reinforcing bar has a height of two floors, and a reinforcing bar guide frame for coupling the half quantity of each floor and supporting it. Way. The method of claim 1, wherein in the construction of the core, A high-rise building structure with reinforced concrete, characterized in that it is divided into at least 2-3 zones, the parallaxes being adjusted so as not to overlap with the pre-installed column and slab zones, and the core is constructed through a continuous sequence of processes. Construction method. The method of claim 1, wherein in constructing the core stairs, A construction method for a high-rise building structure having a reinforced concrete structure, comprising a one-way slab, a temporary design stage for worker movement at an arbitrary position of the core, and a hoist installed on a slab layer in which concrete is placed.

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