KR20090029531A - Underground water catchment and drainage of lower part basement - Google Patents

Abstract

An underground water storing and supplying apparatus of underground structure lower part ground is provided that the efficiency of work can be improved while the manufacturing process shortens. An underground water storing and supplying apparatus of underground structure lower part ground comprises a geo-textile laminated on the foundation construction reference surface according to the designed direction, a drain pipe(20) including the upper cover assembly(21), the lateral support(22) and reinforcement(23), a main socket(30) and an auxiliary socket(40) combined in both ends corresponding to the drain pipe. The main socket includes a main socket upper cover assembly(31), a main part socket lateral support(32) and main socket binding site(33). The auxiliary socket includes an auxiliary socket upper cover assembly(41) and an assistant socket lateral support(42).

Description

Underground water catchment and drainage of lower part basement

The present invention relates to a groundwater collecting and draining device of the lower ground of the underground structure, and more particularly, to reduce the frictional resistance between the groundwater flowing along the inside of the drain pipe and the contact surface of the drain pipe and to maintain a constant casting thickness of the water The present invention relates to a groundwater drainage system of the substructure under the underground structure that can maximize the limit.

In general, excavation work is carried out to a predetermined depth for the construction of civil and architectural underground structures, and the ground (floor surface) after the excavation is completed is the basic construction reference surface, and based on this basic construction reference surface, It will be constructed.

When groundwater penetrates and flows into the foundation construction surface, groundwater acts as a positive pressure on the underground structure. Here, the underground structure refers to a structure that is constructed underground, and includes a building having such an underground structure. The positive pressure acting on the underground structure is generated by the head difference due to the bottom part of the underground structure and the surrounding groundwater level, and acts as a force to lift the underground structure. The positive pressure caused by the groundwater has the following adverse effects on the underground structure. That is, if the positive pressure generated by the groundwater is greater than the static load (dead load) of the underground structure, the underground structure may be injured or inclined to one side, or cracks may be generated in the mat base or foundation floor slab area where the positive pressure is concentrated. Eventually the underground structure is destroyed.

In addition, even if the positive pressure due to the groundwater is less than the static load of the underground structure, it promotes the weakening of the concrete of the underground structure, and groundwater can penetrate into the underground structure through the construction joints (joints) to act as a cause of cracking. .

Therefore, as a countermeasure against the positive pressure caused by groundwater in the construction of civil engineering and building structures with underground floors, the foundation thickness of the underground structure may be increased, or a rock anchor or the like may be installed to resist the positive pressure, or the foundation construction reference surface. A drain pipe is installed in the water pipe to collect and drain the groundwater to reduce the positive pressure.

Recently, a method of draining groundwater to a sump is installed by installing a drain pipe on a basic construction reference plane, and one of the methods is as disclosed in Korean Registered Application No. 20-0336460.

According to the disclosed contents, after digging the basement ground, an additional trench is further excavated to a predetermined depth in the foundation construction reference surface (final excavation surface), and the bundle pipe and gravel (crushed stone) connected to the sump well are filled in the trench. The system is adopted.

Therefore, the groundwater is collected through the geotextiles and drainboards pre-arranged on the foundation construction plane. At the same time, the groundwater is collected into the bundle pipe in the trench and drained to the sump, and the groundwater collected in the sump is forcedly pumped. .

However, such a conventional drainage system has a problem that the trench is not only installed on the foundation construction reference plane but also interferes with the underground structure, so that the allowable bearing capacity of the foundation ground is reduced, and thus it is less than the design ground pressure. In particular, additional trench excavation has a problem in that the construction and stability and economical deterioration and the air is long. In addition, due to the excessive excavation of the trench, the allowable bearing capacity of the foundation ground can be greatly reduced, and there is a problem in that the positive pressure is partially increased when a drain board is not installed between the trench and the trench.

In order to solve this conventional problem, the present applicant has developed a groundwater collecting and draining device (Registration Room No. 20-0396485) of the lower ground of the underground structure. This is provided with a drain board and a double pipe type drain pipe, which are simple to assemble and install, without having to excavate the basic construction reference surface (final digging surface) again so that they can be easily installed on the basic construction reference surface. Such a drainage system collects groundwater that penetrates and inflows through the excavation ground through a drain board without digging the basic construction reference plane again, and quickly drains it to the sump through a drain pipe serving as a collection and drainage. It was. Therefore, the workability is excellent and the air can be shortened, so that the groundwater can be easily and permanently collected and drained so that no positive pressure is applied to the mat-based or foundation floor slab.

Here, the drain pipe includes an inner tube 2 having a drainage hole 2a, an outer tube 3 having a water collecting passage 3a, and an outer diameter of the inner tube 2, as shown in FIGS. 1 and 2. It consists of a connecting plate 4 for integrally connecting the surface and the inner diameter surface of the outer tube (3).

By the way, such a drain pipe is formed to have a relatively large contact area, there is a problem that the collection of water collected on the drain pipe 1 side does not flow smoothly along this. That is, since the inner tube 2 of the cylindrical shape is formed by the connecting plates 4 inside the drain tube 1, the water collecting collected by the drain tube 1 flows along the inner circumferential surface of the outer tube and the connecting plate ( 4) as well as in contact with the outer circumferential surface and the inner circumferential surface of the inner tube 2 having the largest surface area in the drain tube 1 and flow. As the collection flows in contact with a large surface area as described above, the frictional resistance between the contact surfaces is increased, thereby causing a problem that the collection does not flow smoothly along the drain pipe 1.

In addition, the conventional groundwater collection and drainage device of the lower ground structure, was formed by manually drilling a plurality of drain holes (2a) formed in the connecting plate (4). Therefore, the work of drilling a plurality of drainage holes (2a) was very complicated and workability was deteriorated accordingly.

In addition, the conventional groundwater collection and drainage device of the lower ground structure has a lot of restrictions in increasing the amount of water. That is, after installing the drain pipe 1 on the basic construction reference plane, in order to cover the drain pipe 1 sufficiently, usually about 60 mm of concrete is poured on it. In order to increase the water flow rate, a larger diameter drain pipe should be used. In this case, the amount of concrete pouring to cover the large diameter drain pipe increases rapidly, resulting in an increase in construction cost.

An object of the present invention for solving the above problems, while the same role as the groundwater catchment, while underground structure to minimize the frictional resistance with the contact surface of the drain pipe when draining the groundwater to increase the drainage capacity To provide a drain pipe for a groundwater drainage system.

Another object of the present invention is to provide a groundwater collecting and draining device of the substructure of the underground structure to shorten the manufacturing process.

Still another object of the present invention is to provide a groundwater collecting and draining device of the substructure of the underground structure to maximize the limit of water flow while maintaining the thickness of the concrete pouring.

In order to achieve the above object, the groundwater collecting and draining device of the lower ground structure of the present invention is connected to the groundwater collecting and draining device of the lower ground of the underground structure to drain the groundwater infiltrated into the foundation construction reference surface to the water collecting well. In the groundwater drainage device of the, Geosynthetic fibers laminated along the direction designed on the base construction reference surface; Supporting the upper part of the long length forming the upper portion of the drain passage, the side support portion that extends integrally in the lower direction at both ends of the upper cover portion to form both side walls of the drain passage, and the central portion of the upper cover portion A drain pipe formed of a reinforcing part integrally extending below the inner surface of the upper cover part so as to partition an inner space formed of the upper cover part and the side support part along a longitudinal direction thereof; An upper cover part forming the upper part of the drain passage, an address cover side support part which extends integrally under both ends of the upper cover part part and forming both side walls of the drain passage, and a drain board formed at the address side support part An address collar coupled to the address socket coupling part for guiding the groundwater collected in the drain board to the inner space, the address socket being coupled to corresponding both ends of the drain pipe; The auxiliary socket upper cover portion forming an upper portion of the drain passage, and the auxiliary socket side support portion extending integrally along the longitudinal direction at both ends of the auxiliary socket upper cover portion to form both side walls of the drain passage, so as to correspond to the drain pipe An auxiliary socket coupled to both ends; characterized in that it is further provided.

Another feature of the groundwater collecting and draining device of the ground structure lower ground of the present invention, the side support portion and the reinforcing portion of the drain pipe, the catchment passage is formed so that the groundwater penetrated into the base construction reference plane flows into the interior space of the drain pipe.

Another feature of the groundwater collection and drainage device of the lower ground structure of the present invention, the coupling portion of the address socket, respectively formed on both sides of the address side support, or is formed only on one side of the address support side support.

Another feature of the groundwater collecting and draining device of the lower ground structure of the present invention, the auxiliary socket, the planar form of "-shaped", "+ -shaped", "T-shaped", "L-shaped", "Y-shaped" It is made of any one selected from among.

In the present invention as described above, the drain pipe, the address socket, the auxiliary socket is manufactured to have a minimum surface area. Therefore, since the water collection in the drain pipe flows in contact with the minimum surface area, the frictional resistance between the contact surfaces is reduced, so that the water collection is smoothly drained along the drain pipe.

In addition, since the drain pipe of the present invention is provided to be manufactured by one extrusion molding without manual work, the manufacturing process is shortened and thus the work efficiency is improved.

And the drain pipe of the present invention has a cross-sectional area of the tunnel shape wider than the height of the left and right. Therefore, the height of the drain pipe is low, but sufficient water supply space is secured, so that the thickness of the concrete placed on the drain pipe can be reduced than before. If the drain pipe is increased in the left and right width without changing the height and the number of reinforcement by the increased width, it is possible to maximize the flow rate of the drain pipe without thickening the casting thickness of the concrete to be poured over the drain pipe .

The drain pipe of the present invention is supported by the upper cover portion by a side support portion provided on both sides and a plurality of reinforcement portions provided between the side support portion. Both of the two side support parts and the plurality of reinforcement parts are arranged in the vertical direction and support various portions of the upper cover part at equal intervals, so that the high vertical pressure applied to the upper cover part can be sufficiently supported.

Specific features and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings.

Figure 3 is a schematic perspective view showing the installation state of the groundwater collector drainage of the lower ground structure used drain pipe 20 of the present invention, Figure 4 is a partial separated perspective view of the main portion of the present invention, Figures 5 to 5 7 is a cross-sectional view of the drain pipe 20, the address socket 30, the auxiliary socket 40.

In order to install the groundwater collecting and draining device of the lower ground of the underground structure, excavation work is performed first. Through this excavation work, the underground part of civil engineering or building structure is constructed. When the excavation work is completed, the ground surface, that is, the foundation construction reference plane is arranged to be evenly arranged.

When the basic construction reference surface is evenly arranged, geotextiles 11 are laid according to the design layout criteria. The geosynthetic fiber 11 substantially absorbs groundwater penetrated into the foundation construction reference plane and serves as an initial collection.

Subsequently, the drain board 12 is disposed on the geosynthetic fiber 11 according to a design layout reference. Although not shown, the drain board 12 is constructed after being wrapped with a separate geotextile, so that groundwater penetrates into the drainboard 12 while the stone powder or granules are filtered out by the geotextile.

The upper portion of the drain board 12 is a flat plate, and has a structure in which a plurality of convex protrusions 13 are formed at equal intervals on the bottom of the plate. These protrusions 13 transfer the upper load to the bottom of the excavation surface, and the groundwater flows between the protrusions 13.

Then, the drain pipe 20 is disposed on the geosynthetic fiber 11 according to the design arrangement criteria, and the address socket 30 and the auxiliary socket 40 are connected to each connection portion of the drain pipe 20.

As shown in FIGS. 3 and 4, the drain pipe 20 has a long length of the upper lid portion 21 that forms an upper portion of the drain passage, and a lower portion of both ends of the upper lid portion 21 along the longitudinal direction thereof. It extends integrally to support the central portion of the upper cover portion 21 and the side support portion 22 forming both side walls of the drain passage, and the inner space consisting of the upper cover portion 21 and the side support portion 22 in the longitudinal direction thereof. It consists of a reinforcing part 23 extending integrally with the lower side of the inner surface of the upper cover portion 21 to partition along.

The drain pipe 20 is made of a cylindrical inner tube (2) because the upper cover portion 21 and the side support portion 22 formed in a tunnel form and a plurality of plate-shaped reinforcement 23 provided therebetween. Compared with the conventional drain pipe consisting of the cylindrical outer pipe 3 and the connecting plate 4, the surface area thereof is greatly reduced. Therefore, since the water collection in the drain pipe 20 flows in contact with the minimum surface area, the frictional resistance between the contact surfaces is reduced, so that the water collection is smoothly drained along the drain pipe 20.

The drain pipe 20 of the present invention does not have a conventional drainage hole 2a, and the upper cover portion 21. Since the side support part 22 and the reinforcement part 23 are formed long along the longitudinal direction, it can be manufactured by one extrusion without manual labor. Therefore, the manufacturing process of the drain pipe 20 is shortened, thereby improving work efficiency.

The drain pipe 20 has a cross-sectional area of a tunnel shape wider than the height of the drain pipe 20. Therefore, the height of the drain pipe 20 is low, but sufficient water supply space is secured, so that the thickness of the concrete poured on the drain pipe 20 can be reduced than before.

This will be described in more detail as follows.

When the drain pipe 20 of the present invention and the conventional drain pipe 1 have the same cross-sectional area, the height of the drain pipe 20 of the present invention is smaller than the diameter, that is, the height of the conventional drain pipe 1. . Therefore, when the drain pipe 20 of the present invention is poured into concrete, the thickness of the concrete is thinner than when the conventional drain pipe 1 is poured. Therefore, since the drain pipe 20 of the present invention can reduce the thickness of the concrete placed on the upper portion thereof, it is possible to reduce the installation cost of the groundwater drainage device of the lower ground structure.

When the drain pipe 20 increases the left and right widths without changing the height, and increases the number of the reinforcement parts 23 by the increased width, the drain pipe 20 does not have to be thickened. The amount of water passed through the drain pipe 20 can be maximized.

The drain pipe 20 of the present invention is supported by the upper cover portion 21 by the side support portion 22 provided on both sides and the plurality of reinforcement portions 23 provided between the side support portion 22. These two side supports 22 and the plurality of reinforcements 23 are all arranged in the vertical direction. Therefore, since the various parts of the upper cover part 21 are supported at equal intervals, it is possible to sufficiently support the high vertical pressure applied to the upper cover part 21.

The address jacket 30 is formed to have a cross-section having a tunnel shape that is wider in width than right and left like the drain pipe 20, is coupled to a corresponding end of the drain pipe 20, and a drain board 12 is installed. The address jacket 30 has an address cover upper cover part 31 which forms an upper part of the drain passage, and an address cover side support part which extends integrally at both ends of the address cover upper cover part 31 to form both side walls of the drain passage. (32) and the address board side support 32 is formed in the address board coupling portion 33 is coupled to the drain board 12 is coupled to guide the groundwater collected in the drain board 12 to the inner space.

Similar to the drain pipe 20, the above-mentioned address socket 30 is provided to have a cross-sectional area of a tunnel shape wider than the height thereof, so that a sufficient water passage space is secured while the height of the address socket 30 is low. Therefore, it is possible to reduce the thickness of the concrete to be poured on the upper portion of the address jacket 30 than conventional.

The address socket 30 allows the water introduced into the drain board 12 to be guided therein through the address socket coupling part 33, and the groundwater introduced into the address socket 30 is collected through the drain pipe 20. Drained into quartz 10.

Geosynthetic fiber 11, drain board 12, drain pipe 20, address socket 30 and the auxiliary socket 40 to be described later on the construction reference plane is a two-layer polyethylene film (not shown) thereon Lay ground so that groundwater does not enter the base. And finish by pouring concrete (not shown) on the upper surface of the polyethylene film.

The auxiliary socket 40 is connected to the corresponding end of the drain pipe 20 connected to the sump 10 so that the drain pipe 20 is arranged in a straight line, a cross line, or a right angle, or at various angles.

Like the drain pipe 20, the auxiliary socket 40 is provided with a tunnel-shaped cross-sectional area wider than the height thereof, so that sufficient water supply space is secured while the height of the auxiliary socket 40 is low. Therefore, it is possible to reduce the thickness of the concrete poured on the auxiliary socket 40 above than conventional.

The collection and drainage paths of the groundwater collection / drainage system of the lower ground structure of the present invention are as follows.

Groundwater flowing through the basic construction reference surface is absorbed by the geosynthetic fiber 11 and the absorbed groundwater is introduced into the inside of the address basket 30 through the drain board 12. As such, the groundwater that penetrates into the foundation ground of the underground construction and civil engineering structure is easily collected through the drain board 12 and the drain pipe 20 and drained to the sump 10.

The groundwater collecting and draining device of the lower ground structure of the present invention has the following advantages.

First, while the groundwater flows along the drain pipe 20, the inner circumferential surface of the upper cover portion 21 and the side support portion 22 is in contact with both side surfaces of the reinforcement portion 23. Since the drain pipe 20 is formed to have a minimum surface area, frictional resistance between the ground water flowing along the inside of the drain pipe 20 and the contact surface of the drain pipe 20 is minimized. Therefore, the groundwater collected into the drain pipe 20 is smoothly drained along the drain pipe 20 of the present invention in which frictional resistance is minimized.

Second, the drain pipe 20 of the present invention is not formed with a drain hole 2a as in the prior art, and accordingly a conventional process of manually drilling the drain hole 2a is omitted. Therefore, since the drain pipe 20 of the present invention is manufactured by one extrusion molding without manual work, the manufacturing process is shortened and thus the work efficiency is improved.

Third, the drain pipe 20 of the present invention has a cross-sectional area of the tunnel shape wider than the height. Therefore, the height of the drain pipe 20 is low, but sufficient water supply space is secured, so that the thickness of the concrete poured on the drain pipe 20 can be reduced than before.

When the drain pipe 20 increases the left and right widths without changing the height, and increases the number of the reinforcement parts 23 by the increased width, the drain pipe 20 does not have to be thickened. The amount of water passed through the drain pipe 20 can be maximized.

Fourth, the drain pipe 20 of the present invention is supported by the upper cover portion 21 by the side support portion 22 provided on both sides and the plurality of reinforcement portions 23 provided between the side support portion 22. . These two side support parts 22 and the plurality of reinforcement parts 23 are all arranged in the vertical direction and support various parts of the upper cover part 21 at equal intervals. Therefore, the high vertical pressure applied to the upper cover portion 21 can be sufficiently supported.

8 is a perspective view showing another embodiment of the drain pipe 50. The drain pipe 50 extends integrally along the longitudinal direction at both ends of the upper lid portion 51 having a long length forming the upper portion of the drain passage, and under both ends of the upper lid portion 51 to form both side walls of the drain passage. The upper cover part 51 supports the lateral support part 52 and the central part of the upper cover part 51, and partitions the inner space which consists of the upper cover part 51 and the side support part 52 along the longitudinal direction. It consists of a reinforcing part 53 which is integrally extended to the lower side of the inner surface thereof.

In the side support portion 52 and the reinforcement portion 53 of the drain pipe 50, water collecting passages 52a and 53a are formed so that the groundwater penetrating into the basic construction reference plane flows into the internal space of the drain pipe 50. It is.

Therefore, the groundwater penetrating into the basic construction reference plane is introduced into the drain pipe 50 through the drain board 12 and the address socket 30, but into the drain pipe 50 through the collecting passages 52a and 53a. It may also come directly.

9 is a perspective view showing still another embodiment of the drain tube 60. This drain pipe 60 extends integrally along the longitudinal direction below the both ends of the upper cover part 61 of the long length which forms the upper part of a drain passage like FIG. 4, and FIG. The inner space consisting of the side support portion 62 and the central portion of the upper cover portion 61, which forms both side walls of the drain passage, and consists of the upper cover portion 61 and the side support portion 62, is divided along its length direction. It consists of a reinforcement portion 63 extending integrally with the lower side of the inner surface of the upper cover portion 61 so as to.

The drain pipe 60 is different from that of the cross section is formed in a rectangular shape so that the same vertical load is applied to the entire plane compared to FIGS. 4 and 8 and the remaining main functions and effects are the same as described above.

10 is a perspective view showing another embodiment of the address jacket 30. The address jacket 70 extends integrally under both ends of the upper address cover part 71 and the upper part cover part 71 forming the upper part of the drain passage, and forms the side wall of both sides of the drain passage. The support part 72 and the address board side support part 72 are formed and the drain board 12 is coupled to the address book coupling part 73 for guiding the groundwater collected in the drain board 12 to the internal space. The address basket coupling portion 73 is formed only on one side of the address side support portion 72.

The address jacket 70 of the present invention is characterized in that the address book coupling portion 73 is formed only on one side of the address side support portion 72, the rest of the action, the effect is the same as described above.

FIG. 11 is a schematic plan view showing other embodiments of auxiliary sockets 81, 82, 83, 84, 85, 86, 87, 88, and 89, which is a drain pipe 20 ( 50) 60 are connected to the corresponding ends of two adjacent drain pipes 20, 50, 60 so that they are arranged in a straight arrangement, a cross arrangement, or a right angle arrangement, or a curved arrangement of various angles.

The auxiliary sockets 81, 82, 83, 84, 85, 86, 87, 88, and 89 are "-" shaped, "T" shaped, "+" shaped, and "L". It can be produced in a variety of forms, such as, the "Y" shape, and may be selected by connecting to the appropriate joint portion of the drain pipe 20, 50, 60. The auxiliary sockets 81, 82, 83, 84, 85, 86, 87, 88, and 89 may be formed using a rigid material, but are drained to the step generation section of the foundation construction surface. The tube 20, 50, 60 may be molded by using a soft material to facilitate the close installation.

1 and 2 is a schematic perspective view and a cross-sectional view showing a drain pipe for groundwater drainage device of the lower ground in the conventional underground structure

Figure 3 is a schematic perspective view showing the installation state of the groundwater collecting and drainage device of the lower ground structure used the drain pipe of the present invention

Figure 4 is a partially separated perspective view of the main portion of the present invention

5 is a cross-sectional view of the drain pipe;

6 is a cross-sectional view of the address jacket

7 is a cross-sectional view of the auxiliary socket

8 and 9 are perspective views showing other embodiments of the drain pipe

10 is a perspective view showing another embodiment of the address jacket

11 is a schematic plan view showing various embodiments of an auxiliary socket.

* Description of the symbols for the main parts of the drawings *

10: sump crystal 11: geotextile

12: drain board 13: protrusion

20,50,60: Drain pipe 21,51,61: Upper cover part

22,52,62: side support 23,53,63: reinforcement

30,70: Address jacket 31,71: Address upper cover

32,72: Address-cket side support part 33,73: Address-cket coupling part

40,81,82,83,84,85,86,87,88,89: auxiliary socket

41: auxiliary socket top cover 42: auxiliary socket side support

52a, 53a: catchment passage

Claims (5)

In the groundwater collecting and draining device of the lower ground structure to be connected to the groundwater collecting and draining device of the lower ground of the underground structure to drain the groundwater penetrated into the foundation construction reference surface to the collecting basin, Geotextiles (11) laminated in the direction designed on the base construction reference surface; The upper cover part 21, 51, 61 of the long length which forms the upper part of the drain passage, and integrally extended along the length direction under both ends of the upper cover part 21, 51, 61, drainage Supports the side support portions 22, 52 and 62 which form both side walls of the passage, and the central portions of the upper lid portions 21, 51 and 61, and the upper lid portions 21, 51 and 61. A reinforcement part integrally extending below the inner surface of the upper cover parts 21, 51 and 61 so as to partition the inner space formed of the side support parts 22, 52 and 62 along its longitudinal direction. Drain pipes 20, 50 and 60 composed of 23, 53 and 63; The upper side cover portion 31 and 71 of the upper portion of the drain passage and the lower side support portion extending from both ends of the upper portion of the upper portion cover 31 and 71 to form both side walls of the drain passage. (32) (72) and the address plate side support portion (32) (72) formed in the address board coupled to the drain board 12 is coupled to guide the groundwater collected in the drain board 12 to the inner space Composed of a portion (33) (73), the address socket 30, 70 is coupled to the corresponding both ends of the drain pipe (20, 50, 60); Auxiliary socket upper cover portion 41 forming an upper portion of the drain passage, and the sub-socket side support portion extending integrally along the longitudinal direction at both ends of the sub-socket upper cover opening 41 to form both side walls of the drain passage ( 42, the auxiliary sockets 40, 81, 82, 83, 84, 85, 86, 87, which are coupled to the opposite ends of the drain pipes 20, 50, 60; 88) (89); groundwater drainage device of the lower ground structure, characterized in that is further provided. The side support portion 52 and the reinforcement portion 53 of the drain pipe 50 according to claim 1, A groundwater collecting and draining device of the lower ground structure, characterized in that the collecting passage (52a) (53a) is formed so that the groundwater penetrating into the basic construction reference surface is introduced into the interior space of the drain pipe (50). The method of claim 1, wherein the address book coupling portion 33, Underground structure water collection and drainage device, characterized in that formed on both sides of the address socket side support (32), respectively. According to claim 1, wherein the address book coupling portion 73, Groundwater drainage device of the lower ground structure, characterized in that formed on only one side of the address support side support (72). The method of claim 1, wherein the auxiliary sockets 81, 82, 83, 84, 85, 86, 87, 88, 89, The groundwater drainage device of the substructure of the underground structure, characterized in that the planar form consisting of any one selected from "-shaped", "T-shaped", "+ -shaped", "L-shaped", "Y-shaped".

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