KR20090044195A - Core and construction method thereof for extension of elevator operation floor and elevation of seismic resistant performance in remodeling of structure - Google Patents

Abstract

The present invention relates to a core and an installation method thereof for extending an elevator running floor and improving seismic performance, and more particularly, in a remodeling of a structure, the core wall on a top floor slab or a top surface of a structure that is located below a core. Horizontal reinforcing wall coupled horizontally; A vertically extending wall extending vertically downward from the bottom of the bottom slab or the goji slab of the structure located below the core wall; Shin slab formed by connecting the lower portion of the adjacent vertical extension wall; And a plurality of reinforcement piles extending vertically downward from the ground layer along the circumference of the new slab. Consisting of, but the core and the construction method for the extension of the elevator operating floor in the remodeling of the structure, characterized in that the continuous core space is formed from the top of the new slab to the ground floor is improved.

In the case of using the present invention, it is possible to reduce the air and the construction cost by simultaneously performing the construction for the earthquake extension work and the seismic design of the vertical moving line in the remodeling of the structure, and it is possible to secure the structural stability of the structure during the construction process.

Remodel, Elevator, Core, Seismic

Description

Core and construction method for for improvement of elevator operation floor and elevation of seismic resistant performance in remodeling of structure}

The present invention relates to a core and an installation method thereof for extending an elevator running floor and improving seismic performance, and more particularly, in a remodeling of a structure, the core wall on a top floor slab or a top surface of a structure that is located below a core. Horizontal reinforcing wall coupled horizontally; A vertically extending wall extending vertically downward from the bottom of the bottom slab or the goji slab of the structure located below the core wall; Shin slab formed by connecting the lower portion of the adjacent vertical extension wall; And a plurality of reinforcement piles extending vertically downward from the ground layer along the circumference of the new slab. Consisting of, but the core and the construction method for the extension of the elevator operating floor in the remodeling of the structure, characterized in that the continuous core space is formed from the top of the new slab to the ground floor is improved.

The remodeling of the structure is to maximize the aesthetic and economic value of the structure by modifying the limited space of the existing structure in order to secure efficient space and convenient living line. On the other hand, it is not easy to reconstruct existing structures by rebuilding existing structures and rebuilding new structures due to the strengthening of related laws related to volume ratio, occlusion rate and parking number. For this reason, the use of buildings through remodeling that maintains the construction rate of existing structures is increasing.

However, in the remodeling process of the structure, as well as the horizontal expansion of the structure is often accompanied by the vertical expansion as shown in FIG. In particular, when the underground parking lot is newly established in the apartment remodeling, vertical moving lines such as stairs and elevators should be extended to the basement floor for the convenience of the residents (Fig. 2).

In this case, a method of extending the vertical moving line underground can be considered a method of removing a core part including an existing staircase or an elevator and establishing a new one. This method is inefficient considering the stability of existing structures. In particular, in the case of a multi-family house adopting a staircase core, the construction points increase compared to the corridor type, which is more inefficient.

The seismic design method, on the other hand, requires additional consideration of earthquake loads in the design of structures. In Korea, the seismic design method was newly added in 1986 and applied to structures over a certain scale that will be built after 1988. Therefore, seismic design is often not applied to structures before 1988 or low-rise apartments with less than five floors, even if newly constructed after 1988. In addition, in 2005, a mandatory regulation that mandated seismic design for three-story or higher structures was introduced. Therefore, when the size of the structure changes through remodeling, the need for new or additional seismic design is further increased.

Previously, the underground extension work and the seismic design of the vertical mobile line have been carried out separately from the construction of this structure. However, if these works are carried out separately, excessive temporary construction costs are incurred and air is required separately. In addition, since the process of dismantling the existing structure and excavating the basement is doubled, the instability of the structure is doubled. For this reason, even if the construction is completed, risks such as cracking of the structure due to ground subsidence may be involved.

The object of the present invention created to solve the above problems is as follows.

First, it is an object of the present invention to provide a core and a construction method for extending an elevator operating floor and improving seismic performance, which can be carried out simultaneously for underground extension work of a vertical moving line and construction for seismic design in the remodeling of a structure.

Second, it is another object of the present invention to provide a core and an installation method thereof for extending an elevator operating floor and improving seismic performance that can be used as a vertical moving line by extending an existing core part in a remodeling of a structure.

Third, it is another object of the present invention to provide a core and a construction method for extending the elevator operating floor and improving seismic performance that can reduce the air and construction costs in the remodeling of the structure, and maintain the structural stability of the structure in the construction process do.

In order to solve the above problems, the present invention, in the remodeling of the structure, the horizontal reinforcement wall horizontally coupled to the core wall at the bottom of the bottom floor slab or goji elementary slab of the structure located below the core; A vertically extending wall extending vertically downward from the bottom of the bottom slab or the goji slab of the structure located below the core wall; Shin slab formed by connecting the lower portion of the adjacent vertical extension wall; And a plurality of reinforcing files extending vertically downward from the ground layer along the circumference of the new slab; Consists of a continuous core space is formed from the top of the new slab to the ground floor provides a core and a construction method for extending the elevator operating floor and seismic performance in the remodeling of the structure.

That is, the horizontal reinforcing walls around the core play a temporary role in the extension of the elevator operating floor for the underground extension of the vertical moving line, it is possible to extend the underground and the seismic performance of the elevator operating floor in remodeling at the same time.

According to the present invention as described above is expected the following effects.

First, in the case of using the core and the construction method for extending the elevator operating floor and the seismic performance of the present invention, it can be carried out at the same time in the remodeling of the structure underground construction of the vertical moving line and the construction for the seismic design.

Second, when using the core and the construction method for extending the elevator operating floor and seismic performance of the present invention, it can be used as a vertical moving line by extending the existing core portion in the remodeling of the structure.

Third, when using the core and the construction method for extending the elevator operating floor and the seismic performance of the present invention, it is possible to reduce the air and construction costs in the remodeling of the structure, and maintain the structural stability of the structure during the construction process.

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

Figure 3 shows the core for extending the elevator operating floor and seismic performance in the remodeling of the structure corresponding to the present invention, Figure 3 (a) is a plan view of the structure after remodeling, Figure 3 (b) is Figure 3 In (a) is a cross-sectional view of the core of the structure according to A-A '.

The present invention is applicable to a structure that extends the core part including a staircase, an elevator, an elevator room, etc. underground in the remodeling of the structure, and is particularly useful in the remodeling of a wall-type apartment house constructed of reinforced concrete.

Specifically, in the remodeling of the structure corresponding to the present invention, the core for extending the elevator operating floor and improving the seismic performance is as shown in FIG. 3 (b), the bottom floor slab 100 of the structure located below the core, or Horizontal reinforcement wall 200 is horizontally coupled to the core wall 120 from the top of the gojicho slab 110 and the bottom floor slab 100 or lower portion of the goji slab 110 of the structure located below the core wall 120 In the vertical extends vertically extending wall 210.

The horizontal reinforcing wall 200 plays a role of a temporary material in the construction for the vertical extension of the core as well as the role of improving the seismic performance of the structure. That is, the seismic design is to strengthen the horizontal axis of the structure so that the structure is sufficiently resistant to the horizontal vibration caused by the earthquake, as shown in Figure 3 (a) a horizontal reinforcement wall 200 is newly established around the core Structure resists two axes against earthquake, ensuring seismic performance.

In addition, the vertically extending wall 210 is better to ensure the structural stability due to the remodeling by increasing the thickness than the existing wall of the existing structure.

Next, in the remodeling of the structure of the present invention, the core for extending the elevator operating floor and improving the seismic performance has a circumference of the new slab 220 and the new slab 220 formed by connecting lower portions of the adjacent vertical extension walls 210. Accordingly, it comprises a plurality of reinforcement piles 300 extending vertically downward from the ground layer (GL), characterized in that the continuous core space 400 is formed from the upper slab 220 to the ground layer (GL).

The new slab 220 is a part that becomes a new basic slab of the structure after remodeling, and in FIG. 3 (b), the foundation pile 115 is positioned below the new slab 220. Here, the foundation pile 115 includes all of the structures to reinforce the foundation or to reinforce the ground in order to securely support the foundation such as pile foundation or bloom foundation. Of course, it is also possible to consider the foundation, etc. that do not need the foundation pile 115, but if there is a foundation pile 115, the thickness of the new slab 220 is calculated in consideration of the case where the existing file or peer portion is removed. shall.

In addition, the reinforcement pile 300 is characterized in that a plurality of spaced apart a predetermined interval along the circumference of the core. Here, the reinforcement pile 300 is located at the lower portion of the horizontal reinforcement wall 200 to support the upper load, and ultimately also serves to improve the seismic performance by increasing the total number of foundation piles. In this case, as the reinforcement pile 300, a micro pile having a smaller diameter than the ready-made pile may be adopted. The micro pile supports the upper load mainly depending on the principal friction.

On the other hand, the pit layer 410, which is a facility space where mechanical equipment and the like is located, is located below the continuous core space 400.

Next, FIGS. 4A to 4H are core cross-sectional views illustrating processes of a core construction method for extending an elevator operating floor and improving seismic performance in a remodeling of a structure of the present invention.

In order to construct a core for extending the elevator operating floor and improving seismic performance in the remodeling of the structure, first, as shown in FIG. 4A, the bottom floor slab 100 or the goji slab 110 of the existing structure has a constant width along the core circumference. Cut to have At this time, the slab is cut using a breaker or a diamond cutter.

Next, (b) a plurality of reinforcement piles 300 are formed vertically downward in the ground layer G.L through the cut bottom floor slab 100 or the gojicho slab 110 portion (FIG. 4B). Considering the remodeling of the structure, micro files are used because it is not easy to drive and insert a file. Specifically, the micro pile (b1) forms a drilling hole of about 150 mm at the position where the reinforcing pile 300 is to be formed, and (b2) inserts a core material consisting of a steel rod or reinforcing bar having a diameter of about 50 to 65 mm into the drilling hole. and (b3) grouting around the core material in the drilled hole with cement solution. At this time, the diameter of the drilling hole may be different depending on the load and ground conditions, steel rods, etc. used as the core material can be used that the thread is formed over the entire length to enable a continuous joint.

After the reinforcement pile 300 is formed as described above, (c) the bottom layer slab 100 or the goji base slab 110 and the reinforcement pile 300 which are positioned above the reinforcement pile 300 are integrated. (Figure 4c). Here, the integration of the gojicho slab 110 and the reinforcement pile 300 located in the upper portion of the reinforcement pile 300 excavates the base extension portion 117 along the periphery of the goji slab 110 ((c1 of FIG. 4C). )), By placing the reinforcing bar in the foundation extension 117, and then cast concrete (Fig. 4c (c2)). In addition, it is preferable to insert the retaining wall 310 along the circumference of the excavation scheduled portion in order to prevent the soil from falling toward the existing structure when the lower part of the core is excavated later.

And (d) forming a horizontal reinforcing wall 200 horizontally coupled to the core wall 120 on the lowermost floor slab 100 or the goji elementary slab 110 positioned below the core (FIG. 4D). As an example of the method of forming the horizontal reinforcement wall 200, a temporary material for supporting an existing structure is installed, and the concrete of the vertical slab and the wall of the position where the horizontal reinforcement wall 200 is to be formed is chipped, and then the horizontal reinforcement wall ( The horizontal reinforcing wall 200 may be formed by reinforcing the reinforcing bars in the vertical and horizontal directions at the position at which the 200 is to be formed. At this time, the reinforcing bar should be completely settled in the existing structure, and the grout material is inserted along the part where the reinforcing bar is inserted to ensure the fixing. Next, formwork is installed on the front and rear of the reinforcing bar, and the concrete is poured between the space formed by the formwork to complete the horizontal reinforcement wall (200).

After the horizontal reinforcement wall 200 is completed through the steps as described above, the construction for extending the vertical moving line underground is performed.

That is, (e) cutting the lowermost floor slab 100 or the goji-lab slab 110 portion located under the core, and (f) the lowermost floor slab 100 or goji grass of the structure cut through the step (e). The lower portion of the slab 110 is to be excavated (Figs. 4e and 4f). At this time, in step (f), if there is a foundation pile 115, the foundation pile 115 is also cut together to the bottom of the excavation.

Next, (g) forming the new slab 220 in the ground excavated through the step (f), and (h) vertically upwards along the circumference of the new slab 220 at the upper portion of the new slab 220. The extension wall 210 is poured to extend to the core wall 120 to complete the construction of the core for extending the elevator running floor and improving the seismic performance (FIGS. 4G and 4H).

While the invention has been described in connection with the preferred embodiment as mentioned above, various modifications and variations are possible without departing from the spirit of the invention. Therefore, the claims of the present invention include modifications and variations that fall within the true scope of the invention.

1 is a cross-sectional view showing a structure before and after remodeling.

Figure 2 is a cross-sectional view showing the core of the structure before and after remodeling.

Figure 3 (a) and (b) is a plan view and a core cross-sectional view showing a core for extending the elevator operating floor and improved seismic performance in the remodeling of the structure corresponding to the present invention, respectively.

4A to 4H are core cross-sectional views showing a process of a core construction method for extending an elevator operating floor and improving seismic performance in a remodeling of a structure corresponding to the present invention.

<Description of Major Symbols in Drawing>

100: lowest floor slab 110: gojicho slab

115: Foundation File 117: Foundation Extension

120: core wall 200: horizontal reinforcement wall

210: vertically extending wall 220: new slab

300: reinforcement pile 310: retaining wall

400: continuous core space 410: pit layer

G.L: Ground Layer

Claims (7)

In the remodeling of the structure, A horizontal reinforcing wall 200 horizontally coupled to the core wall 120 on the lowermost floor slab 100 or the gojicho slab 110 of the structure located below the core; A vertically extending wall 210 extending vertically downward from the bottom of the bottom slab 100 or the goji slab 110 of the structure positioned below the core wall 120; Shin slab 220 is formed by connecting the lower portion of the adjacent vertical extension wall (210); And, A plurality of reinforcement piles 300 extending vertically downward from the ground layer G.L along the circumference of the new slab 220; in It's done, The core for extending the elevator floor in the remodeling of the structure, characterized in that a continuous core space 400 is formed from the upper slab 220 to the ground floor (G.L). In claim 1, The reinforcement pile 300 is a core for extending the elevator operating floor and seismic performance in the remodeling of the structure, characterized in that the micro pile. The method of claim 1 or 2, The lower portion of the continuous core space 400 is a pit layer 410 core for extending the elevator operating floor and seismic performance in the remodeling of the structure. In the remodeling of the structure, (a) cutting the lowermost floor slab 100 or the goji slab 110 of the existing structure to have a constant width along the circumference of the core; (b) forming a plurality of reinforcement piles 300 vertically downward in the ground layer (G.L) through the cut lowermost floor slab (100) or gojichoe slab (110); (c) integrating a reinforcement pile 300 with a lowermost bottom slab 100 or a goji base slab 110 positioned above the reinforcement pile 300; (d) forming a horizontal reinforcing wall 200 which is horizontally coupled to the core wall 120 on the lowermost floor slab 100 or the upper goji slab 110 positioned below the core; (e) cutting a portion of the lowermost floor slab 100 or the goji slab 110 located below the core; (f) excavating a lower portion of the bottom slab 100 or the goji slab 110 of the structure cut through the step (e); (g) forming a new slab 220 in the ground excavated through the step (f); And, (h) placing the vertical extension wall 210 vertically upwards along the periphery of the new slab 220 and extending to the core wall 120 at the top of the new slab 220; in Core construction method for extending the elevator operating floor in the remodeling of the structure, characterized in that made. In claim 4, The reinforcement file 300 of step (b) is a micro file, (b1) forming a drilling hole at a position where the reinforcing pile 300 is to be formed; (b2) inserting a core material into the drilling hole; And, (b3) grouting around the core in the drill hole; To Core construction method for extending the elevator operating floor and seismic performance in the remodeling of the structure, characterized in that made through. The method of claim 4 or 5, The integration of the goji slab 110 and the reinforcement pile 300 located in the upper portion of the reinforcement pile 300 of step (c) excavates the base extension portion 117 along the periphery of the goji slab 110, the foundation Core construction method for extending the elevator operating floor and seismic performance improvement in the remodeling of the structure, characterized in that by pouring concrete to the expansion portion (117). The method of claim 4 or 5, Step (d) (d1) installing a temporary material for supporting an existing structure; (d2) chipping concrete of the upper and lower slabs and the wall where the horizontal reinforcing wall 200 is to be formed; (d3) reinforcing the bars in the vertical and horizontal directions at the position where the horizontal reinforcing wall 200 is to be formed; (d4) installing formwork on the front and rear of the rebar; And, (d5) placing concrete in the space formed by the formwork; in Core construction method for extending the elevator operating floor in the remodeling of the structure, characterized in that made.

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