KR100616123B1 - Groundwater collection / drainage system of lower ground of underground structure and construction method - Google Patents

Abstract

The present invention relates to a groundwater collecting and draining device and a construction method of the lower ground of the underground structure, and more specifically, to collect the groundwater permanently by using a drain board and a PDD pipe in the form of a double drain pipe without digging again the basic construction reference surface. The present invention relates to a groundwater collection and drainage device of a substructure of an underground structure to be drained, and a construction method thereof.

To this end, the present invention and geotextiles laid in a predetermined arrangement on the final drilling surface; A drain board disposed on the geotextile in a predetermined arrangement; A PDD pipe having a double drainage pipe arranged in a predetermined arrangement on the geotextile and communicatively connected to the drain board; A first socket connecting the drain board and the PDD tube to communicate with each other; A second socket connecting each joint part of the PDD pipe; It provides a groundwater drainage device and a construction method of the basement floor, characterized in that it comprises a plurality of layers of polyethylene film covering the entire construction surface including the geotextile and drain board, PDD pipe and the like.

Underground structure collection drainage device, construction method, PDD pipe, drain board, geotextile, socket, polyethylene film

Description

Device for drain underground water and method for construction the same}

1 is a perspective view showing a PDD pipe used in the groundwater collection and drainage device of the lower ground structure in accordance with the present invention;

Figure 2a is a cross-sectional view showing a circular cross-sectional shape as a PDD pipe used in the groundwater collecting and drainage device of the ground substructure of the underground structure according to the present invention,

Figure 2b is a cross-sectional view showing that the PDD pipe used in the groundwater collecting and drainage device of the lower ground structure according to the present invention, in addition to the circular cross-sectional shape, made in various shapes,

3 is a perspective view showing a first socket for a drain board connected to the PDD pipe of the groundwater collecting and draining device of the lower ground structure according to the present invention;

Figure 4 is a perspective view showing a second socket for connection of various types connected to the PDD pipe of the groundwater collection and drainage device of the ground structure lower ground according to the present invention,

Figure 5 is a perspective view showing an embodiment of the installation state of the groundwater collection and drainage device of the lower ground structure in accordance with the present invention,

Figure 6 is a perspective view showing another embodiment of the installation state of the groundwater collection and drainage device of the lower ground structure according to the present invention,

7 is a flow chart illustrating a construction method of a groundwater collection and drainage device of the lower ground structure in accordance with the present invention;

8 is a cross-sectional view taken along the line A-A of FIG.

9 is a cross-sectional view taken along the line B-B of FIG.

10 is a cross-sectional view showing a drain board and a second geotextile of the groundwater collecting and draining device of the lower ground structure in accordance with the present invention.

<Explanation of symbols for the main parts of the drawings>

10: PDD tube 12: inner tube

14: outer tube 16: connecting plate

18: drainage hole 20: catchment

22: first socket 24: hollow tube

26: hollow plate 28: drain board

30: second socket 32: first geotextile

34: projection 36: polyethylene film

38: discarded concrete 40: the second geotextile

The present invention relates to a groundwater drainage device and a construction method of the lower ground structure (architecture), more specifically, to ground water permanently using a drain board and a double drain pipe type PDD pipe without digging the foundation construction reference surface again. The present invention relates to a groundwater collecting and draining device of a substructure of an underground structure (architecture) which can be collected and drained.

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 the groundwater penetrates the foundation construction surface, the groundwater acts as a positive pressure on the underground structure (building), and this positive pressure is generated by the head difference due to the bottom part of the underground structure (building) and the surrounding groundwater level. It acts as a lifting force for underground structures (buildings). The positive pressure caused by the groundwater has the following adverse effects on the underground structure (building).

That is, if the positive pressure generated by the groundwater is greater than the static load (dead load + live load) of the underground structure, the underground structure (building) is inclined to one side or the other side, or the mat base where the positive pressure is concentrated or Cracks are generated in the foundation floor slab area, eventually destroying underground structures (buildings).

In addition, even if the positive pressure due to the groundwater is less than the static load (dead load + live load) of the underground structure (building), it promotes the weakening of the concrete of the underground structure (building), and the groundwater is connected to the underground structure (building) through construction joints (joints). ) It can penetrate into the inside and 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 house to install 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 disclosed in Korean Registered Application No. 20-0336460.

In the disclosed contents, after excavation of the basement ground, additional trenches are excavated to a predetermined depth in the basic construction reference plane (final excavation surface), and the bundle pipes and gravel (crushed stone) connected to the sump well are filled in the trenches. The system is adopted.

Therefore, the groundwater is collected through the geotextiles and drainboards pre-arranged in the foundation construction plane, and 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. do.

However, in the existing drainage system as described above, since the trench is constructed on the foundation construction plane and also interferes with the underground structure, the allowable bearing capacity of the foundation ground is reduced, which causes the design ground pressure to be lowered. There is a problem that the economy is lowered and the air is long.

In addition, the allowable bearing capacity of the foundation ground may be greatly reduced due to the over-excavation of the trench, and there is a problem in that the positive pressure is partially increased when the drain board is not installed between the trench and the trench.

In addition, there is a problem in that positive pressure is partially generated because the connection between the drain board and the bundle pipe is poor and the groundwater cannot be drained smoothly.

The present invention was developed in order to solve all the problems of the existing drainage structure and method as described above, drain boards that are simple to assemble and install by developing a standardized material without digging the basic construction reference surface (final digging surface) again And by constructing the double-drain pipe type PDD pipe on the basic construction reference plane, the groundwater infiltrated through the excavation ground can be collected through the drain board, and it can be quickly drained to the water collecting well through the PDD pipe, which serves as a collection and drainage. It provides excellent workability and shortens the air, and eventually provides groundwater drainage system and construction method of the substructure of the underground structure (building) that prevents positive pressure from acting as the groundwater is easily and permanently collected and drained. Its purpose is to.

In particular, the PDD pipe of the present invention has a double structure inside and outside, that is, the space in which water flows, and each of them is connected to each other through a drain hole, so that the groundwater flows smoothly and maximizes the extension of the inner surface of the external drainage path. It is possible to maximize the water supply capacity of the external drainage channel with the minimum cross section, and it is manufactured in the shape of a circular geometric shape to resist the external load most advantageously, and by connecting the internal and external drainage channels directly with the connecting plate. In addition, the bending strength and impact strength of the PDD pipe are maximized to prevent the settlement of the foundation due to the deformation of the PDD pipe.

Groundwater collection and drainage device of the substructure of the underground structure of the present invention for achieving the above object:

First geotextiles laid in a predetermined arrangement on the final drilling surface; A drain board disposed on the first geotextile in a predetermined arrangement; A second geosynthetic fiber surrounding the drain board; A PDD tube having a double drainage pipe disposed on the first geotextile in a predetermined arrangement and connected to the drain board so as to communicate with the drain board; A first socket connecting the drain board and the PDD tube to communicate with each other; A second socket connecting each joint part of the PDD pipe; It comprises a two-layer polyethylene film covering the entire construction surface, including the geotextile and drain board, PDD pipe and the like.

In a preferred embodiment, the PDD pipe is characterized by consisting of an inner tube formed with a drainage hole, an outer tube formed with a water collecting passage, and a connecting plate integrally connecting the outer diameter surface of the inner tube and the inner diameter surface of the outer tube. .

In a more preferred embodiment, the drainage holes are disposed at four sides of the inner tube, at equal intervals along the longitudinal direction thereof, and the collecting channel is formed at all four sides of the outer tube, along the longitudinal direction of the drain tube. "It is characterized by being formed by incision.

In addition, the PDD tube is characterized in that the molded shape of any one selected from the shape of a circle, oval, square, horseshoe.

In another preferred embodiment, the first socket is a socket for connecting the drain board and the PDD pipe, the hollow tube having a '-' shape directly connected to the outer diameter of the outer pipe of the PDD pipe by a second socket; It is characterized in that the hollow tube is formed integrally with one side or both sides of the hollow tube so that the leading end of the drain board is introduced.

In addition, the second socket is a socket for directly connecting the PDD pipe, which is selected from any one of the hollow tube formed of "-" shape, "+" shape, "T" shape, "L" shape, "Y" shape. It features.

In addition, the second socket is characterized in that the PDD tube is made of a flexible material so that the PDD tube can be installed in close contact with the basic construction surface when the foundation construction surface has a step (height).

On the other hand, by the connection of the first socket and the second socket is characterized in that it is formed so as to cover the exposed part of the outer tube with the second geotextile except for the shielded portion of the PDD tube.

Construction method of the groundwater collection and drainage of the underground structure (architecture) lower ground of the present invention for achieving the above object is:

Arranging excavation work and foundation construction reference surface; Laying a first geotextile on the basic construction reference surface; Disposing a drainboard wrapped with a second geotextile on the first geotextile; Placing a PDD tube on the first geotextile and simultaneously connecting each joint portion to a second socket, and connecting the drainboard and the PDD tube to each other through a first socket; Laying and finishing a polyethylene film over the basic construction reference surface on which the geotextile, drain board, PDD pipe and sockets are constructed; And casting the discarded concrete over the upper surface of the polyethylene film.

In a preferred embodiment, it comprises the step of wrapping the exposed portion of the outer tube with a second geotextile except for the shielded portion of the PDD tube by the connection of the first socket and the second socket.

Hereinafter, a preferred embodiment of the groundwater collecting and draining device and the construction method of the lower ground structure of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a PDD pipe used in the groundwater collecting and draining device of the underground structure (building) lower ground according to the present invention, Figure 2a is a cross-sectional view, showing a circular cross-sectional shape.

In addition, as shown in FIG. 2B, the PDD tube 10 may be manufactured in various cross-sectional structures such as an oval, a square, a horseshoe, as well as a circular cross section.

The PDD (Permanent Double Drain) tube 10, which is a main configuration of the present invention, is a double-drain tube type tube, which includes an inner tube 12 and an outer tube 14, and an inner tube 12 and an outer tube 14. Consists of a connecting plate 16 to be integrally connected, it can be produced in a selection of circular, oval, square, horseshoe shape and the like.

More specifically, the inner tube 12 of the PDD tube 10 is a hollow tube, the drain hole 18 is formed through the four sides, the drain hole 18 is the length of the inner tube 12 It continues to form at equal intervals along the direction.

In addition, the outer tube 14 of the PDD tube 10 is a hollow tube arranged to be spaced apart from the outer diameter surface of the inner tube 12, the water collecting passage 20 having a width larger than the drain hole 18 in all four positions thereof. ) Is formed, and this water collecting passage 20 is formed by cutting the "-" character along the longitudinal direction of the outer tube 14.

In this case, the four connecting plates 16 are integrally formed between the outer diameter surface of the inner tube 12 and the inner diameter surface of the outer tube 14 so that the inner tube 12 and the outer tube 14 are integrally formed with each other. It is formed.

In particular, the surface of the outer tube 14 of the PDD tube 10 is all wrapped with the second geosynthetic fiber 40 to prevent the inlet is introduced through the water collecting passage 20 so that only groundwater is introduced.

3 is a perspective view showing a first socket for a drain board connected to the PDD pipe of the groundwater collecting and draining device of the underground structure (building) lower ground according to the present invention.

As shown in FIG. 3, the first socket 22 is a socket connecting the drain board 28 and the PDD pipe 10 to be described later, and the hollow pipe directly connected to the outer diameter of the outer pipe of the PDD pipe 10. (24) and one side of the hollow tube 24 (see Fig. 3A) or both sides (see Fig. 3B) are integrally formed so as to communicate with each other so that the tip of the drain board 28 is formed. It consists of a hollow plate 26 to be drawn in.

4 is a perspective view showing a second socket for connection of various types connected to a PDD pipe which is a groundwater collecting and draining device according to the present invention.

As shown in Figure 4, the second socket 30 is a socket for directly connecting the PDD pipe 10, "-" shaped, "+" shaped, "T" shaped, "L" shaped, "Y" It can be configured in various forms according to the shape and design conditions and the situation of the construction site.

5 is a perspective view showing an embodiment of the installation state of the groundwater collecting and drainage device of the underground structure (architecture) lower ground according to the present invention, Figure 8 is a cross-sectional view taken a line AA of Figure 5, Figure 9 It is sectional drawing which took the BB line of FIG.

Hereinafter, the groundwater drainage device of the underground structure (building) lower ground constructed using the PDD pipe 10, the first socket 22, and the second socket 30 configured as described above will be described with reference to FIG. 7. The method will be described together.

First, an excavation work is carried out to construct an underground part of a civil engineering or building structure, and the step of evenly arranging the ground surface in which the excavation work is completed, that is, the basic construction reference plane, is preceded.

Next, the step of laying the first geosynthetic fiber 32 in a predetermined arrangement according to the design arrangement criteria of the basic construction reference surface is in progress.

The first geosynthetic fiber 32 substantially absorbs groundwater penetrating into the basic construction reference plane to serve as initial collection.

Subsequently, a step of arranging the drain board 28 according to a predetermined design layout standard by performing groundwater penetration analysis on the first geotextile 32 is performed. As shown, the construction is wrapped with the second civil fiber 40 and serves as an intermediate path for collecting ground water absorbed by the second civil fiber 40.

The upper portion of the drain board 28 is a flat plate, the convex protrusions 34 are formed at equal intervals on the bottom surface of the plate body, the protrusions 34 transfer the upper load to the bottom of the excavation surface, In addition, the flow of groundwater is induced between the projections 34.

And, the surface of the drain board 28 is all wrapped with the second geosynthetic fiber 40 so that only the groundwater penetrates while the foreign matter is filtered.

Next, the groundwater penetration analysis is performed on the first geotextile 32 to arrange the PDD pipe 10 according to a predetermined design layout standard, and at the same time, connect each joint portion to the second socket 30.

That is, in connecting the PDD pipe 10 to the catchment of the groundwater, it is connected through a straight arrangement, cross arrangement, or right angle arrangement, or a variety of angled curve arrangement, the joint portion of each PDD pipe 10 It is connected to the second socket (30).

In more detail, the second socket 30 is manufactured in the "-" shape, the "+" shape, the "T" shape, the "L" shape, the "Y" shape, etc. as described above. What is necessary is just to connect and connect a suitable thing to each joint part of (10).

In particular, although the second socket 30 may be manufactured by using a rigid material, the second socket 30 may be manufactured by using a flexible material so that the PDD pipe 10 may be closely installed in a step generation section of the foundation construction surface. .

At the same time, the step of connecting the drain board 28 and the PDD pipe 10 in communication with each other by the first socket 22 is also in progress.

That is, the PDD tube 10 is connected to the hollow tube through the second socket 30, and at the same time, the front end portion of the drain board 28 on the hollow plate 26 formed integrally on one or both sides of the hollow tube 24. Just insert

Subsequently, two layers of polyethylene films 36 are laid on the foundation construction reference plane on which the geotextiles 32 and 40, the drain board 28, the PDD pipe 10, and the sockets 22 and 30 are constructed. This prevents groundwater from entering the base.

Finally, a subsequent process such as casting the discarded concrete 38 over the upper surface of the polyethylene film 36 is performed.

Referring to the collection and drainage path of the groundwater of the underground structure (building) lower ground of the present invention constructed as described above are as follows.

Groundwater flowing through the foundation construction reference surface is absorbed by the first geosynthetic fiber 32 and passes through the hollow plate 26 of the first socket 22 through the drain board 28 of the PDD pipe 10. Flow toward the outer tube (14).

In addition, the groundwater is introduced and drained through the water collecting passage 20 of the outer pipe 14 of the PDD pipe 10, and the water collected through the drain board 28 increases as the water is collected and the PDD pipe ( 10) flows into and out of the inner tube 12 and another outer tube through the drainage hole 18 of the inner tube 12.

That is, the groundwater collected through the outer tube 14, the water collecting passage 20, and the drain board 28 of the PDD tube 10 may have an inner tube 12 of the PDD tube 10 arranged at predetermined intervals. The drain pipe is finally drained along the inside of the outer tube 14.

In this way, the underground water infiltrated into the foundation ground of the underground construction and civil engineering structure is easily collected through the drain board 28 and the PDD pipe 10 and drained to the sump.

Meanwhile, as shown in FIGS. 5 and 6, the exposed portion of the outer tube 14 except for the portion of the PDD tube 10 covered by the first and second sockets 22 and 30. By covering directly with the second geosynthetic fiber 40, the groundwater flowing into the water collecting channel through the second geosynthetic fiber 40 immediately as well as the water collecting passage 20 of the outer tube 14 of the PDD pipe 10 The water is quickly collected and drained through the drainage holes 18 of the inner tube 12, so that the groundwater catchment and drainage performance can be further improved.

Although the technical idea of the groundwater collecting and draining device and the construction method of the ground underground structure of the present invention has been described based on the exemplary drawings, this is illustrative of the best embodiment of the present invention and the claims of the present invention. It is not limited.

It is apparent that the present invention can be variously modified and imitated by those skilled in the art without departing from the scope of the technical idea of the present invention.

As described above, according to the present invention, the groundwater drainage device and the construction method of the groundwater infiltrate into the lower ground (architecture) according to the present invention, based on the standard construction material drain board and double-drain pipe-type PDD pipe base construction reference plane By simply installing in the groundwater, the groundwater penetrating through the excavation ground can be collected through the drain board, and at the same time, it can be quickly drained to the sump through the PDD pipe, which serves as a collection and drainage.

In particular, since the size of the catchment and drainage device is small, it can be installed in the discarded concrete, so the foundation construction reference surface (final excavation surface) does not need to be excavated again to form a trench, so the workability is excellent and the air can be greatly shortened. .

In addition, the structure of the PDD pipe is double inside and outside, that is, the space in which water flows, and each of them is connected to each other through the drainage hole to facilitate the flow of groundwater, and to maximize the extension of the inner side of the external drainage path to minimize The cross section also has the advantage that the water supply capacity to the external drainage can be maximized.

In addition, the PDD pipe is manufactured in a circular geometric shape to most advantageously resist external loads, and strongly connects the internal and external drain pipes to the connecting plate, thereby maximizing the bending strength and impact strength of the PDD pipe. It is possible to prevent settlement of the base body due to deformation.

As a result, the groundwater collecting and draining device and construction method of the groundwater infiltrating into the underground structure (architecture) lower ground of the present invention by easily collecting and draining the groundwater permanently without reducing the allowable bearing capacity of the foundation ground, thereby excluding positive pressure, It is possible to secure the stability of the entire structure as well as underground structures of civil engineering and construction.

Claims (10)

In the groundwater collection and drainage device of the substructure of the underground structure, First geotextiles laid in a predetermined arrangement on the final drilling surface; A drain board disposed on the first geotextile in a predetermined arrangement; A second geosynthetic fiber surrounding the drain board; A PDD pipe having a double drainage pipe disposed on the first geotextile in a predetermined arrangement and connected to the drainboard so as to be in communication with the drainboard; A first socket connecting the drain board and the PDD tube to communicate with each other; A second socket connecting each joint part of the PDD pipe; An underground water collecting and draining device of the substructure of the underground structure, characterized in that it comprises a two-layered polyethylene film covering the entire construction surface including the geotextile, drain board, PDD pipe and the like. The method according to claim 1, The PDD tube may include an inner tube having a drainage hole; An outer tube in which a water collecting passage is formed; An underground water collection and drainage device of the lower ground structure of the underground structure, characterized in that consisting of a connecting plate for integrally connecting the outer diameter surface of the inner tube and the inner diameter surface of the outer tube. The method according to claim 1 or 2, The drainage hole of the inner tube of the PDD tube is disposed at four sides of the inner tube, and is disposed at equal intervals along the longitudinal direction, and the collecting channel of the outer tube is formed at all four positions of the outer tube, Underground water collection and drainage device of the lower ground structure, characterized in that formed by cutting along the "-". According to claim 1 or claim 2, The PDD pipe is groundwater drainage device of the basement ground structure, characterized in that the molded in any one shape selected from the shape of a circle, oval, square, horseshoe. The method according to claim 1, The first socket is a socket for connecting the drain board and the PDD pipe, the "-" shaped hollow pipe directly connected to the outer diameter of the outer pipe of the PDD pipe to the second socket; An underground water collecting and draining device of the lower ground of the underground structure, characterized in that the hollow tube formed integrally formed in communication with one side or both sides of the hollow tube to the leading end of the drain board. The method according to claim 1, wherein the second socket is a socket for directly connecting the PDD pipe, any of the hollow tube formed of "-" shaped, "+" shaped, "T" shaped, "L" shaped, "Y" shaped Groundwater drainage device of the substructure of the underground structure, characterized in that one. The basement structure according to claim 1 or 6, wherein the second socket is made of a flexible material so that the PDD pipe can be installed in close contact with the foundation construction surface when the foundation construction surface has a step (height). Groundwater collection and drainage system in the lower ground. According to claim 1, Underground structure, characterized in that formed by the connection of the first socket and the second socket to cover the exposed part of the outer tube with a second geosynthetic fiber except for the shielded portion of the PDD pipe Groundwater drainage device. In the groundwater drainage system construction method of the underground structure (architecture) lower ground, Arranging excavation work and foundation construction reference surface; Laying a first geotextile on the basic construction reference surface; Disposing a drain board wrapped with a second geotextile on the first geotextile; Placing a PDD tube on the first geotextile and simultaneously connecting each joint portion to a second socket, and connecting the drainboard and the PDD tube to each other through a first socket; Laying and finishing a polyethylene film over the basic construction reference surface on which the geotextile, drain board, PDD pipe and sockets are constructed; A method of constructing a groundwater drainage device for an underground structure, characterized in that it comprises the step of pouring discarded concrete over the upper surface of the polyethylene film. 10. The underground structure according to claim 9, comprising the step of wrapping the exposed part of the outer tube with the second geotextile except for the shielded part of the PDD tube by the connection of the first socket and the second socket. Construction method of groundwater drainage system of lower ground.

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