KR20090043626A - Method for constructing a sump in the bottom structure - Google Patents

Abstract

The present invention comprises the steps of scavenging a portion of the oyster finish surface 100 in the position where the collecting well 10 is to be installed; A horizontal reinforcing bar having a plurality of ribs and a transverse reinforcing bar intersecting the inner wall, and having a cylindrical sump (10) made of FRP or HDPE material installed at the cut position; Reinforcing the cast iron 30 for the foundation slab; Additional reinforcement of the sump reinforcement reinforcement 40 so as to surround the sump well 10, so that the reinforcement ratio of the sump reinforcement reinforcement 40 is 2 to 5 times compared to the reinforcement ratio of the main reinforcing bar 30 for the foundation slab step; And building the foundation slab 50 by pouring concrete so that the sidewalls of the sump 10 become formwork.

Collection

Description

Construction method {method for constructing a sump in the bottom structure}

The present invention relates to a water collecting well construction method, and more particularly, using a water collecting well made of a material such as FRP (Fiber glass reinforced plastic) and HDPE (High Dendity Polyethylene). It relates to a water collecting well construction method that can ensure a sufficient durability while constructing.

In buildings with a certain basement level, a water collecting well is required. The water collection well should not only collect the water generated during construction and pump it out, but also collect the rainwater, groundwater, and cleaning water that flow into the dry area or underground parking lot lamp after the completion of the construction. do.

For this reason, the sump is located at the lowest part of the building, either the foundation or the lowest floor slab (abbreviated as 'base slab'), where it is directly exposed to bearing strength or water pressure so that the sump can withstand these conditions. It is composed.

In the prior art, the sump was formed in a reinforced concrete structure having the same thickness as the bottom concrete layer at the time of design. In order to install such a water collecting well, it is necessary to reinforce concrete work for forming a separate trench and a water collecting well structure, which requires separate air.

In addition, the groundwater is usually collected at the lowest point, making it difficult to work with reinforced concrete under such conditions. Furthermore, it is not easy to construct various piping or facilities connected to the sump.

In order to solve this problem, a water collecting well made of steel has been proposed. 1 shows an example of a forced sump.

The steel sump 1 is constructed by integrally or partially assembling the steel, and has a flange 2 for coupling with the connecting reinforcement with its own rigid reinforcement.

That is, the steel sump (1) is constructed to be connected to the main reinforcing bar of the foundation slab in order to transfer the pressure, such as earth pressure or water pressure transmitted from the bottom to the surrounding structure. To this end, a plurality of connecting holes 3 are formed in the flange 2 of the water collecting well, and a connecting reinforcing bar (not shown) is inserted therein to be connected to the main reinforcing bars during construction.

However, such a construction is not only very troublesome, but also increases the air cost and increases the construction cost. Nevertheless, the reason why the steel sump (1) should be connected to the main reinforcing bar is because the structural stiffness at the point where the sump should be installed is not considered separately when designing the foundation slab.

In other words, when the sump is arranged, the structural gap of the foundation slab is generated, which requires the sump itself to compensate. For this reason, the steel sump 1 should not only have a plurality of flanges for its own rigid reinforcement, but also be connected to the surrounding cast iron through the connecting hole 3 to complement the rigidity integrally.

Another disadvantage of the existing steel sump (1) is that it is prone to corrosion due to the characteristics of the sump exposed to water and outside air. In order to compensate for this weakness, a method of hot-dip galvanizing the entire steel sump and epoxy plating on it is also applied, which also acts as an important factor to increase the manufacturing cost.

The present invention was devised in view of the above problems, and an object of the present invention is to provide a method of manufacturing using a water collecting well having a very low manufacturing cost by manufacturing FRP or HDPE material.

Another object of the present invention is to supplement the stiffness by the structure of the foundation itself at the point where the sump well should be installed when designing the foundation or the lowermost slab, and to reduce the stiffness that the sump is burdened in the related art. Excluding used construction provides a very easy collection and installation construction method.

In order to achieve the above object, a water collecting well construction method according to a preferred embodiment of the present invention comprises the steps of: digging a portion of the gulto finish surface at the position where the water collecting well should be installed; A horizontal reinforcing bar having a plurality of ribs and a transverse reinforcing bar intersecting the inner wall, the cylindrical collecting well made of FRP or HDPE material installed at the trenched position; Reinforcing the cast iron for the foundation slab; Additionally reinforcing the sump reinforcing bars to surround the sump, so that the ratio of the reinforcing bar of the sump reinforcing bar is 2 to 5 times higher than the reinforcing ratio of the main reinforcing bar for the foundation slab; And constructing the foundation slab by pouring concrete so that the sidewalls of the sump become formwork.

Preferably, a horizontal flange 14 is formed on the outer wall of the sump, and the flange is constructed to be embedded in the concrete of the foundation slab.

According to another embodiment of the present invention, the step of digging a portion of the gulto finish surface at the location where the collection well is to be installed; A plurality of ribs formed therein and having a cylindrical sump made of FRP or HDPE material at the dig-out position, such that the top flange of the sump is placed on the gulting surface; Installing a cylindrical formwork on the sump top; Reinforcing the cast iron for the foundation slab; Additionally reinforcing the sump reinforcing bars to surround the sump, so that the ratio of the reinforcing bar of the sump reinforcing bar is 2 to 5 times higher than the reinforcing ratio of the main reinforcing bar for the foundation slab; And constructing the foundation slab by pouring concrete; And after curing the concrete, removing the cylindrical formwork so that the foundation slab concrete forms the sidewall of the sump.

Preferably, the top flange of the sump is embedded in the concrete of the foundation slab.

The water collecting construction method of the present invention has the following effects.

First, since the present invention employs a water collecting well made of FRP or HDPE material, the manufacturing cost is cheap and there is no fear of corrosion, and the structure is simple and light, so installation and construction are very easy.

Secondly, in the water collecting well construction method of the present invention, since the water collecting well reinforcing reinforcing bars are additionally added to reinforce the rigidity of the water collecting wells in addition to the cast iron of the foundation slab, even if the water collecting well made of FRP or HDPE material is employed, there is no structural problem. Further, since the process of connecting the collection wells one by one using the connecting rebars as in the related art is omitted, there is an advantage in that construction is simple and the air can be shortened.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

2 schematically shows the configuration of the sump 10 according to the preferred embodiment of the present invention. Referring to the drawings, the water collecting well 10 of the present invention has a cylindrical container structure and the water collecting hole 11 is formed so that groundwater or rainwater can be introduced.

Sump 10 according to the present invention is integrally formed of a material such as FRP or HDPE. Although the sump well 10 has been described as being cylindrical in this embodiment, it may be a rectangular sump well.

Preferably, a plurality of ribs 12 may be formed inside the sump 10 for rigid reinforcement, and more preferably, in order to resist earth pressure or water pressure in the center direction with respect to the sump 10. It may further include a plurality of transverse reinforcing bars 13 formed across the inner wall of the 10). The structure and arrangement of the ribs 12 and the transverse reinforcing bar 13 are not limited by the present invention and may be appropriately selected as necessary.

In addition, a flange 14 in the horizontal direction may be formed on the outer wall of the sump 10, which is to prevent the sump 10 from rising by buoyancy such as water pressure.

In particular, the water collecting well 10 according to the present invention is not provided with any structure for connecting with reinforcing bars as in conventional steel water collecting wells.

3 and 4 is a view showing a construction process using a water collecting well according to the present invention. With reference to the drawings, it will be described a water collecting construction method according to a preferred embodiment of the present invention.

First, dig a portion of the gultinga finish surface 100 in the position where the collection well 10 is to be installed.

Then, install the sump 10 made of FRP or HDPE material according to the present invention. At this time, preferably, a gravel layer (not shown) is formed at the bottom of the collecting well 10 so that groundwater or rainwater may flow through the collecting hole 11 formed at the bottom of the collecting well 10. In addition, the inlet pipe 20 may be further installed to allow the groundwater to flow therein.

When the water collecting well 10 is installed as above, the main reinforcing bar 30 is arranged to build the foundation slab.

According to the present invention, in addition to the main reinforcing bar 30, the sump reinforcement reinforcing bar 40 surrounding the sump well 10 is further reinforced. The sump reinforcing bar 40 is for structural rigidity reinforcement to apply the sump 10 according to the present invention. That is, in the water collecting well construction method according to the present invention, it is not necessary to form a connection hole (3 in FIG. 1) in the water collecting well 10 itself and thus is not connected to the rebar. Instead, it is configured to supplement the structural reinforcement for the sump 10 by the sump reinforcement 40.

According to the experiments of the present inventors, the sump reinforcement reinforcing bar 40 is installed to have a reinforcing ratio of about 2 to 5 times compared to the reinforcement ratio (ratio of the reinforcement cross-sectional area to the effective cross-sectional area of the concrete) of the main reinforcing bar 30 for the foundation slab It is preferable.

Although not shown in the figure, the lower plate of the sump 10 may be further installed to prevent the leakage of groundwater.

As described above, when the main reinforcing bar 30 and the sump reinforcing bar 40 are reinforced, the concrete is poured to build the foundation slab 50. At this time, the side wall of the sump (10) serves as a formwork.

Through the above process, the foundation slab 50 in which the water collecting well is constructed is obtained.

The flange 14 formed in the transverse direction on the outer surface of the sump 10 is buried in the concrete of the foundation slab 50 is able to resist buoyancy due to water pressure.

5 and 6 are views showing a water collecting well 10 'and a construction state using the same according to another embodiment of the present invention.

Referring to the drawings, the sump 10 'according to the present embodiment has a shorter length than the sump 10 of the above-described embodiment and the remaining structure is the same, and thus, further detailed description thereof will be omitted. In the case of the water collecting well 10 'of the present embodiment, since the ribs 12' are sufficient in rigidity, the horizontal reinforcing bar 13 'can be omitted as necessary.

Since the sump 10 'of the present embodiment has a short length, it forms a substructure of the sump, and the remaining superstructure is formed by the concrete foundation slab.

That is, looking at the water collecting construction method according to the present embodiment with reference to Figure 6, first dig a part of the gulto finish surface 100 in the position where the water collecting well (10 ') should be installed.

Then, install the sump 10 'made of FRP or HDPE material according to the present invention. At this time, the upper flange (10a) of the sump (10 ') to be placed on the gulting finish surface (100).

Preferably, the empty space between the water collecting well 10 'and the ground is filled with gravel or soil, and a water collecting plate (not shown) between the top flange 10a and the gulting finish surface 100 of the water collecting well 10'. Install more.

Subsequently, the cylindrical formwork 110 is installed on the sump 10 '. The inner diameter of the formwork 110 is preferably set to correspond to the inner diameter of the sump (10 '), so that the concrete poured as will be described later to serve as the inner wall of the sump.

At the same time, reinforce the main reinforcing bar 30 'for the foundation slab construction, and additionally reinforce the collecting well reinforcing bar 40' surrounding the cylindrical formwork 110 in addition to the main reinforcing bar 30 '. The function and specifications of the sump reinforcing bar 40 'are the same as described above.

As described above, when the main reinforcing bar 30 'and the sump reinforcing bar 40' are reinforced, concrete is poured to build the foundation slab 50 '.

Then, curing the concrete and removing the cylindrical formwork 110, the sump is completed while the foundation slab 50 'concrete constitutes the sidewall of the sump 10'.

At this time, the upper flange (10a) of the sump (10 ') is embedded in the concrete of the foundation slab (50') to be able to resist buoyancy due to water pressure.

Although the present invention will be described in detail with reference to the following drawings, these drawings illustrate preferred embodiments of the present invention, and the technical concept of the present invention is not limited to the drawings and should not be interpreted.

1 is a perspective view schematically showing the structure of a steel sump well according to the prior art.

Figure 2 is a perspective view schematically showing the structure of the sump according to an embodiment of the present invention.

3 is a cross-sectional view showing a construction process using a water collecting well according to an embodiment of the present invention.

Figure 4 is a plan view showing a construction process using a water collecting well according to an embodiment of the present invention.

5 is a perspective view schematically showing the structure of a water collecting well according to another preferred embodiment of the present invention.

6 is a cross-sectional view showing a construction process using a water collecting well according to another preferred embodiment of the present invention.

Claims (4)

Digging a portion of the oyster finish surface 100 at a location where the collection well 10 is to be installed; A horizontal reinforcing bar having a plurality of ribs and a transverse reinforcing bar intersecting the inner wall, and having a cylindrical sump (10) made of FRP or HDPE material installed at the trenched position; Reinforcing the cast iron 30 for the foundation slab; Additional reinforcement of the sump reinforcement reinforcement 40 so as to surround the sump well 10, so that the reinforcement ratio of the sump reinforcement reinforcement 40 is 2 to 5 times compared to the reinforcement ratio of the main reinforcing bar 30 for the foundation slab step; And And placing the concrete so that the side walls of the sump (10) form a mold, and constructing the foundation slab (50). The method of claim 1, The outer wall of the sump 10 is formed with a flange 14 in the horizontal direction, And the flange (14) is embedded in the concrete of the foundation slab (50). Digging a portion of the oyster finish surface 100 at a location where the collecting well 10 'is to be installed; A plurality of ribs are formed therein and the cylindrical sump (10 ') made of FRP or HDPE material is installed at the above-mentioned position, but the upper flange (10a) of the sump (10') is on the gulting finish surface (100) To be placed in; Installing a cylindrical formwork (110) on the sump (10 '); Reinforcing the cast iron 30 'for the foundation slab; Further reinforce the sump reinforcing bar 40 'to surround the sump well 10', but the reinforcing ratio of the sump reinforcing bar 40 'is 2 ~ compared to the reinforcing ratio of the main reinforcing bar 30' for the foundation slab. Multiply by five times; And Placing concrete to build a foundation slab 50 '; And After concrete curing, removing the cylindrical formwork (110) so that the foundation slab (50 ') concrete to form the side wall of the sump (10'); the sump construction method comprising a. The method of claim 3, The top flange (10a) of the sump (10 ') is a sump construction method, characterized in that embedded in the concrete of the foundation slab (50').

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