KR20210016169A - Steel pit structure for elevator - Google Patents

Abstract

The present invention relates to a steel elevator pit structure of a middle wall type which arranges and separates a first pit module and a second pit module from each other and connects the first pit module and the second pit module by a base frame below to integrate the first pit module and the second pit module when installing a hoistway divided by a middle wall to firmly fix the base frame and the first and second pit modules in concrete to resist buoyancy. According to the present invention, the steel elevator pit structure of a middle wall type relates to a steel elevator pit buried in a concrete foundation of a lower portion of a hoistway and comprises: a first pit module of a rectangular cross section of which an upper portion is opened; a second pit module which has a rectangular cross section of which an upper portion is opened, and is laterally separated from the first pit module to form a wall construction unit between the first pit module and the second pit module; and an integrated base frame of a rectangular shape provided below the first pit module and the second pit module, wherein a lateral end thereof protrudes to the outside of the first pit module and the second pit module.

Description

Middle wall steel elevator pit structure {Steel pit structure for elevator}

In the present invention, when installing a hoistway divided by an intermediate wall such as a household boundary wall, the first pit module and the second pit module are arranged to be spaced apart from each other, but connected to the lower base frame to integrate the base frame and the first and second pit modules. It is about an intermediate wall-type steel elevator pit structure that is firmly fixed in the concrete and can resist buoyancy.

In general, elevator pit is installed under an elevator shaft for installing a shock absorber or checking equipment.

Since such an elevator pit must be provided at the bottom of a building, it is usually embedded in the mat foundation.

However, although the foundation work itself does not require a formwork, a separate formwork installation and dismantling work is required to form a space for installing the elevator pit inside the foundation.

In addition, the elevator pit part is usually installed to descend a certain depth below the foundation. Therefore, it is difficult to install reinforcing bars and formwork, thereby increasing the construction period and reducing economic efficiency.

In order to solve the problem of such conventional elevator pit construction, a box-type elevator pit structure with an open top that can minimize field work by pre-fabricating an elevator pit has been developed (Registration Patent No. 10-1508898).

However, since the structure for elevator pit is light in weight, there is a concern of injury due to buoyancy when pouring basic concrete.

Accordingly, as in Registration Patent No. 10-1705264, the end of the lower member is protruded to both sides of the pit, and concrete is firstly poured and cured, so that the lower member, which is the base frame, is fixed in the primary concrete, and the foundation concrete is secondarily formed. A technique for pouring was developed (Fig. 1).

However, when the hoistway is divided by an intermediate wall such as a household boundary wall in an apartment house, if the elevator pit structure is installed on the left and right sides of the intermediate wall, the base frame cannot protrude to the outside of the elevator pit structure.

Accordingly, the base frame cannot be firmly fixed in the first poured concrete, and as a result, there is a problem that the elevator pit structure rises and separates during concrete pouring or by underground water pressure.

In order to solve the above problems, the present invention is to provide an intermediate wall-type steel elevator pit structure capable of resisting buoyancy by being firmly fixed in concrete in a hoistway divided by an intermediate wall.

The present invention according to a preferred embodiment relates to a steel elevator pit buried in a concrete foundation under a hoistway, the first pit module of a rectangular cross-section with an open top; A second pit module having an open upper side and spaced apart from the first pit module in a transverse direction to form a wall composition therebetween; And a rectangular integrated base frame provided under the first pit module and the second pit module and having side ends protruding outward of the first pit module and the second pit module. It provides an intermediate wall-type steel elevator pit structure, characterized in that consisting of.

The present invention according to another preferred embodiment is an intermediate wall, characterized in that the upper portion of the first pit module and the second pit module are mutually fixed with an upper support frame connecting the outer edges of the first pit module and the second pit module to each other. Provides a steel elevator pit structure.

The present invention according to another preferred embodiment provides an intermediate wall-type steel elevator pit structure, characterized in that the pre-assembled reinforced mesh is inserted and installed inside the wall composition part.

The present invention according to another preferred embodiment is a reinforcing frame that is composed of a wall panel, a vertical reinforcing bar, and a horizontal reinforcing bar on the side of the wall composition part of the first and second pit modules so as to be detachably fixed to the inner surface of the wall panel. It provides an intermediate wall-type steel elevator pit structure, characterized in that consisting of.

In the present invention according to another preferred embodiment, the vertical reinforcing bar and the horizontal reinforcing bar of the reinforcing frame have an end of one leg fixed to the reinforcing bar, and an end of the other leg is a wall panel by an a-shaped fixing bracket fixed to the wall panel. It provides an intermediate wall-type steel elevator pit structure, characterized in that fixed to.

The present invention according to another preferred embodiment provides an intermediate wall-type steel elevator pit structure, characterized in that an extension plate is bolted to one side of the other leg of the fixing bracket, and an end of the extension plate is fixed to the wall panel.

The present invention according to another preferred embodiment provides an intermediate wall-type steel elevator pit structure, characterized in that the horizontal reinforcing bar located on the upper part of the reinforcing frame is coupled to the upper support frame by a reinforcing frame fixing tool.

The present invention according to another preferred embodiment provides an intermediate wall-type steel elevator pit structure, characterized in that the upper portion of the base frame of the wall composition is closed by a leak-proof plate.

According to the present invention, when installing a hoistway divided by an intermediate wall, the first pit module and the second pit module are spaced apart from each other, but these modules are connected to the lower base frame to be integrated. It is possible to provide an intermediate wall-type steel elevator pit structure capable of resisting buoyancy by firmly fixing 1 and 2 foot modules in concrete.

1 is a view showing a construction method of a conventional elevator pit structure.
Figure 2 is a perspective view showing the present invention intermediate wall-type steel elevator pit structure.
3 is a perspective view showing a coupling relationship between a support post and an upper support frame.
Figure 4 is a cross-sectional view showing a concrete foundation in which the present invention intermediate wall-type steel elevator pit is installed.
5 is a plan view showing an intermediate wall-type steel elevator pit structure of the present invention.
6 is a perspective view showing a coupling relationship between a wall panel and a reinforcing frame.
7 is a perspective view showing an embodiment of a reinforcing frame.
8 is a plan view showing a coupling relationship between a reinforcing frame and a wall panel by a fixing bracket according to an embodiment.
9 is a cross-sectional view showing a coupling relationship between a reinforcing frame and a wall panel by a fixing bracket according to another embodiment.

Hereinafter, the present invention will be described in detail according to the accompanying drawings and preferred embodiments.

Figure 2 is a perspective view showing the present invention intermediate wall-type steel elevator pit structure, Figure 3 is a perspective view showing the coupling relationship between the support post and the upper support frame, Figure 4 is the present invention concrete intermediate wall-type steel elevator pit is installed It is a cross-sectional view showing the foundation.

As shown in Figures 2 to 3, the present invention the intermediate wall-type steel elevator pit structure relates to a steel elevator pit (2) buried in the concrete foundation (3) in the lower part of the hoistway, and the upper part of the open square cross section. 1 foot module 21a; A second pit module (21b) having a rectangular cross-section with an open top and spaced laterally from the first pit module (21a) so as to form a wall composition portion (22) therebetween; And a rectangular integral base provided under the first pit module 21a and the second pit module 21b, and the side ends protruding outward of the first pit module 21a and the second pit module 21b. Frame 23; It characterized in that it consists of.

The present invention is to provide an intermediate wall-type steel elevator pit structure capable of resisting buoyancy by being firmly fixed in concrete in a hoistway divided by an intermediate wall.

The steel elevator pit 2 is embedded in the concrete foundation 3 below the hoistway.

The intermediate wall-type steel elevator pit structure of the present invention includes a first pit module 21a, a second pit module 21b, and a base frame 23.

Each of the first pit module 21a and the second pit module 21b has a rectangular cross section with an open top.

The first pit module 21a and the second pit module 21b are disposed to be spaced apart from each other in the transverse direction, and a wall composition part 22 is formed therebetween.

That is, the wall composition part 22 is formed between the first pit module 21a and the second pit module 21b, and the intermediate wall 4 is installed on the wall composition part 22 later.

The first pit module 21a and the second pit module 21b are spaced apart from each other to the left and right based on the intermediate wall 4.

The base frame 23 has a rectangular shape and is integrally provided under the first pit module 21a and the second pit module 21b.

The base frame 23 has a side end protruding outward of the first pit module 21a and the second pit module 21b.

In the present invention, instead of the first pit module 21a and the second pit module 21b being spaced apart from each other, the lower base frame 23 connects and integrates them. Accordingly, the first pit module 21a and the second pit module 21b installed on the base frame 23 and the base frame 23 can be firmly fixed by the first poured concrete.

The first pit module 21a and the second pit module 21b serve as a formwork for constructing the intermediate wall 4 on the wall forming part 22 therebetween.

The wall composition part 22 is opened on both sides of the upper part so that the lower part of the intermediate wall 4 can be constructed at the same time when basic concrete is placed.

Each of the first pit module 21a and the second pit module 21b may have a rectangular or square cross-section with an open top.

Each of the first pit module 21a and the second pit module 21b has a support post 211 disposed at each corner, and a side panel 212 may be coupled between the neighboring support posts 211.

The side panel 212 may be configured in a waveform in which valleys and floors are alternately formed so as to support side pressure and stably support an upper load when pouring foundation concrete.

An upper support frame 213 may be coupled to the upper part of the support post 211 and the side panel 212 to reinforce upper rigidity.

A formwork mounting frame 214 for fixing a lower end of a formwork for placing a hoistway wall may be coupled to an upper portion of the upper support frame 213.

The formwork mounting frame 214 is a consumable material coupled to the upper support frame 213 to fix and fasten the formwork for placing the hoistway wall above the concrete foundation 3, and is detachably coupled to the upper part of the upper support frame 213 can do. The formwork mounting frame 214 can be disassembled and removed after completion of the hoistway wall construction.

In addition, in order to prevent the inflow of groundwater coming up through the side panel 212 through the gap between the concrete foundation 3 and the side panel 212, a shearing order key 215 is installed on the outer surface of the upper support frame 213. I can.

The shear order key 215 is fixed by connecting the upper reinforcing bar (not shown) of the foundation, and is interlocked with the interior of the foundation concrete to be integrated, thereby resisting buoyancy caused by underground water pressure.

The base frame 23 may be configured in a rectangular shape having a certain thickness, and may be formed by bending or welding a steel material.

The base frame 23 may be filled by placing a floor reinforcement 231 therein to support buoyancy caused by groundwater, and then pouring filled concrete (not shown) therein.

The base frame 23 is formed to protrude outward from the side panels 212 of the first pit module 21a and the second pit module 21b, and is configured to be buried in the discarded concrete (3') and the concrete foundation (3). It can be done (Fig. 4). Thereby, the steel elevator pit 2 and the foundation behave integrally with respect to the lower buoyancy and can be resisted.

As shown in FIGS. 3 and 4, the upper portions of the first pit module 21a and the second pit module 21b connect the outer edges of the first pit module 21a and the second pit module 21b to each other. It can be fixed to each other by the upper support frame 213.

The lower portions of the first pit module 21a and the second pit module 21b are supported by the base frame 23, but the upper portions are separated from each other. Accordingly, it is difficult to support concrete lateral pressure when placing concrete inside the wall composition unit 22, and it is difficult to fix the first and second feet modules 21a and 21b.

Therefore, by connecting the upper support frame 213 installed on the top of the first pit module 21a and the second pit module 21b into one, the outer edges of the first pit module 21a and the second pit module 21b are It can be configured to be connected to each other.

Accordingly, since the first pit module 21a and the second pit module 21b are firmly fixed to each other, it is easy to maintain the shape of the elevator pit structure. In addition, when spacers are installed to maintain the spacing between the formwork on both sides of the intermediate wall (4) when partial concrete is poured, since the spacer penetrates through the intermediate wall (4), there is a risk of leakage from the intermediate wall (4). ), the gap between the two forms is maintained, so there is no need for a separate spacer to be installed, preventing leakage.

As shown in FIG. 3 and the like, the upper part of the base frame 23 of the wall composition part 22 may be configured to be closed by a leak-proof plate 232.

The base frame 23 may have an open upper surface for pouring concrete. However, when the upper surface of the base frame 23 is opened, water may flow into the elevator pit structure while riding the intermediate wall 4.

Accordingly, the upper portion of the base frame 23 of the wall composition 22 may be configured to prevent leakage by covering and closing the leakage prevention plate 232.

5 is a plan view showing an intermediate wall-type steel elevator pit structure of the present invention.

As shown in FIG. 5, a pre-assembled reinforcing bar network 25 may be inserted into the wall composition part 22.

An intermediate wall 4 is installed in the wall composition 22.

Since the intermediate wall 4 is a member that supports the vertical load, the wall reinforcement is reinforced to transmit the vertical load to the foundation.

However, since the steel elevator pit structure is pre-assembled at the factory and brought on-site and installed, reinforcement work is performed within the narrow wall construction part 22 between the first pit module 21a and the second pit module 21b. Is not easy.

Therefore, it is possible to install the wall reinforcement on site, but by inserting and installing the pre-assembled reinforcement network 25 in advance when manufacturing the elevator pit structure, the reinforcement work on the site can be omitted.

6 is a perspective view showing a coupling relationship between a wall panel and a reinforcing frame.

As shown in Fig. 6, the side surfaces of the first pit module 21a and the second pit module 21b on the side of the wall forming part 22 are wall panels 26 and vertical reinforcing bars 271 and horizontal reinforcing bars ( It is composed of 272 and may be composed of a reinforcing frame 27 that is detachably fixed to the inner surface of the wall panel 26.

The side surfaces of the wall composition part 22 of the first pit module 21a and the second pit module 21b must maintain rigidity so as to support the lateral pressure during concrete placement of the intermediate wall 4.

However, the intermediate wall 4 may be difficult to support side pressure because there is often no spatial margin when installing an elevator or the like.

Therefore, by fixing the reinforcing frame 27 detachable to the wall panel 26, the intermediate wall 4 may be configured to support lateral pressure during concrete placement.

The reinforcing frame 27 is composed of a vertical reinforcing bar 271 and a horizontal reinforcing bar 272.

Specifically, the reinforcing frame 27 may be integrally configured by arranging horizontal reinforcing bars 272 at the upper and lower portions, respectively, and combining a plurality of vertical reinforcing bars 271 between the upper and lower horizontal reinforcing bars 272. .

The reinforcing frame 27 may be removed after curing the concrete of the intermediate wall 4 so as not to interfere during the construction of the hoistway facility.

The wall panel 26 is preferably formed of a flat plate in order to secure the cover thickness of the reinforcing bar of the intermediate wall 4 and secure a minimum space for installing an elevator inside the elevator pit.

Meanwhile, a ladder for checking an elevator must be installed inside the elevator pit. However, when fixing the elevator inspection ladder to the wall panel 26 by welding in the field, a hole may be formed in the wall panel 26 due to negligence of welding and water leakage may occur.

Accordingly, a ladder fixing panel 261 for installing a ladder for checking an elevator may be pre-attached to the inner side of the wall panel 26.

As shown in FIG. 6 and the like, the horizontal reinforcing bar 272 located on the upper part of the reinforcing frame 27 may be configured to be coupled to the upper support frame 213 by a reinforcing frame fixing tool 273.

The reinforcing frame 27 may be fixed to the upper support frame 213 with bolts using a separate reinforcing frame fixing tool 273 so that the reinforcing frame 27 can be fixed without a welding process.

That is, both ends of the horizontal reinforcing bar 272 located at the upper part may be assembled and fixed to the upper support frame 213 by the reinforcing frame fasteners 273, respectively.

In addition, the horizontal reinforcing bar 272 located at the bottom may be assembled and fixed to the leak-proof plate 232 by a reinforcing frame fixing tool 273.

Since the reinforcing frame fixing tool 273 can be assembled and fixed to the upper support frame 213 or the leakage preventing plate 232 by bolts, there is no damage to the member during disassembly.

7 is a perspective view showing an embodiment of a reinforcing frame, and FIG. 8 is a plan view showing a coupling relationship between a reinforcing frame and a wall panel by a fixing bracket according to an embodiment.

7 and 8, the vertical reinforcing bar 271 and the horizontal reinforcing bar 272 of the reinforcing frame 27 are fixed to the reinforcing bars 271 and 272 at one end of the leg 281. , The end of the other leg 282 may be configured to be fixed to the wall panel 26 by the a-shaped fixing bracket 28 fixed to the wall panel 26.

Since the process of fixing the reinforcing frame 27 to the wall panel 26, which is a steel plate, is performed during factory manufacturing of the elevator pit structure, it is easy to secure welding quality.

On the other hand, the dismantling of the reinforcing frame 27 is performed at the time of the hoistway facility construction after curing the basic concrete at the site.

Therefore, the disassembly of the reinforcing frame 27 is made by field equipment workers who are less skilled in welding or oxygen cutting, and there is a possibility of damage to the wall panel 26, and a leakage problem may occur.

Therefore, the reinforcing frame 27 can be welded to the wall panel 26 using the a-shaped fixing bracket 28 so as not to damage the wall panel 26 when dismantling the reinforcing frame 27 at the site.

For the welding of the fixing bracket 28 as described above, the wall panel 26 may use a steel plate.

The fixing bracket 28 is for fixing the reinforcing frame 27 to the wall panel 26, and can be pre-attached by welding during factory manufacturing.

In the case of dismantling the reinforcing frame 27 after pouring and curing concrete for the formation of the intermediate wall 4 in the wall composition 22, the other leg 282 of the fixing bracket 28 is cut to cut the reinforcing frame ( 27) can be dismantled.

At this time, the dashed-dotted line portion of the fixing bracket 28 shown in FIG. 8 may be cut and the reinforcing frame 27 may be disassembled.

In this way, if the middle of the leg of the fixing bracket 28 is cut instead of the welding portion between the fixing bracket 28 and the wall panel 26, damage to the wall panel 26 can be prevented.

Both ends of the horizontal reinforcing bar 272 may be fixed to the support post 211 or the inner side of the wall panel 26.

The horizontal reinforcing bar 272 may be fixed by welding, and when the reinforcing frame 27 is dismantled, the reinforcing frame 27 can be disassembled by cutting an end of the horizontal reinforcing bar 272 side.

A yoke fixture 29 for fixing the yoke may be attached to the inside of the vertical reinforcing bar 271.

9 is a cross-sectional view showing a coupling relationship between a reinforcing frame and a wall panel by a fixing bracket according to another embodiment.

9, an extension plate 283 is bolted (B) to one side of the other leg 282 of the fixing bracket 28, and the end of the extension plate 283 is attached to the wall panel 26. Can be configured to be fixed.

As described above with respect to FIG. 8, once the other leg 282 of the fixing bracket 28 is cut to remove the reinforcing frame 27, in order to reuse the reinforcing frame 27, the entire fixing bracket 28 There is a hassle to cut again and weld the new fixing bracket 28.

Accordingly, the extension plate 283 is bolted (B) to the end of the other leg 282 of the fixing bracket 28, so that the reinforcing frame 27 can be easily reused.

Accordingly, the reinforcing frame 27 may be removed by cutting the extension plate 283 after curing the intermediate wall 4 concrete.

Then, the bolt (B) connecting the extension plate 283 and the other leg 282 of the fixing bracket 28 is removed to remove the remaining portion of the extension plate 283, and then the other leg of the fixing bracket 28 ( It is possible to fasten a new extension plate 283 to 282 with a bolt (B).

After the reinforcement frame 27 is reinstalled, one leg 281 and the other leg 282 of the fixing bracket 28 can be recycled as it is.

1: Ground 2: Steel elevator feet
21a: first pit module 21b: second pit module
211: support post 212: side panel
213: upper support frame 214: formwork mounting frame
215: shear order key 22: wall construction unit
23: base frame 231: floor reinforcement
232: leakage prevention plate 25: pre-assembled reinforcing bar net
26: wall panel 261: ladder fixing panel
27: reinforcing frame 271: vertical reinforcing bar
272: horizontal reinforcing bar 273: reinforcing frame fixing tool
28: fixing bracket 281: one leg
282: the other leg 283: extension plate
29: yoke fixture 3: concrete foundation
3': discarded concrete 4: intermediate wall
B: bolt

Claims (8)

It relates to a steel elevator pit (2) buried in the concrete foundation (3) under the hoistway,
A first pit module (21a) having a rectangular cross-section with an open top;
A second pit module (21b) having a rectangular cross-section with an open top and spaced laterally from the first pit module (21a) so as to form a wall composition portion (22) therebetween; And
A rectangular integrated base frame that is provided under the first pit module 21a and the second pit module 21b and has a side end protruding outward of the first pit module 21a and the second pit module 21b (23); An intermediate wall-type steel elevator pit structure, characterized in that consisting of.
In claim 1,
The upper part of the first pit module 21a and the second pit module 21b is fixed to each other by an upper support frame 213 connecting the outer peripheries of the first pit module 21a and the second pit module 21b to each other. An intermediate wall-type steel elevator pit structure, characterized in that.
In claim 1,
An intermediate wall-type steel elevator pit structure, characterized in that a pre-assembled reinforcing bar network (25) is inserted and installed in the wall composition (22).
In claim 1,
The side of the first pit module 21a and the second pit module 21b on the side of the wall forming part 22 is composed of a wall panel 26, a vertical reinforcing bar 271 and a horizontal reinforcing bar 272. An intermediate wall-type steel elevator pit structure, characterized in that consisting of a reinforcing frame (27) that is detachably fixed to the inner side of (26).
In claim 4,
The vertical reinforcing bar 271 and the horizontal reinforcing bar 272 of the reinforcing frame 27 are fixed to the reinforcing bars 271 and 272 at one end of the leg 281, and the end of the other leg 282 is a wall panel An intermediate wall-type steel elevator pit structure, characterized in that it is fixed to the wall panel 26 by the a-shaped fixing bracket 28 fixed to 26.
In clause 5,
An intermediate wall, characterized in that an extension plate 283 is bolted (B) to one side of the other leg 282 of the fixing bracket 28, and an end of the extension plate 283 is fixed to the wall panel 26 Steel elevator pit structure.
In claim 4,
An intermediate wall-type steel elevator pit structure, characterized in that the horizontal reinforcing bar 272 located on the upper part of the reinforcing frame 27 is coupled to the upper support frame 213 by a reinforcing frame fixing tool 273.
In claim 1,
An intermediate wall-type steel elevator pit structure, characterized in that the upper part of the base frame 23 of the wall composition 22 is closed by a leak-proof plate 232.

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