KR100719356B1 - Plumbing for Draining Underground Water and Controlled De-watering System with Target Water Level Using the Plumbing - Google Patents

Abstract

The groundwater drainage structure according to the present invention is connected to the perforated pipe through the perforated pipe 12 and the foundation concrete 20 inserted into the perforated part 11 formed in the ground 10, and the inner pipe 31 having an open top. ), An outer tube 32 surrounding the outside of the inner tube and draining the groundwater overflowing through the open portion of the inner tube through the inner wall, and a drain pipe 33 connected to the outer tube to discharge the groundwater to the outside. ), And the outer tube is formed inside the pillar of the underground structure. In addition, the present invention provides a groundwater drainage system including a plurality of such groundwater drainage structure.

Groundwater, Positive Pressure, Drainage System, Target Water Level

Description

Groundwater drainage structure and target water level using the same {Plumbing for Draining Underground Water and Controlled De-watering System with Target Water Level Using the Plumbing}

1 is a cross-sectional view of the groundwater drainage structure according to the present invention.

FIG. 2 is a cross-sectional view taken along line AA ′ of FIG. 1.

Figure 3 is a schematic diagram showing a target water level corresponding drainage system according to the present invention (a) is a plan view and (b) is a sectional view.

4 is an enlarged cross-sectional view of the target water level drainage structure of FIG. 3.

5 is an enlarged cross-sectional view of the emergency water level drainage structure of FIG. 4.

* Brief description of the major symbols in the drawings *

1: groundwater drainage structure 1 ': target water drainage structure

1 ": emergency water drainage structure 10: ground

11: drilling 12: merit

13: cement inlet plate 20: foundation concrete

21: Horizontal movement bar 30: Column

31: inner tube 32: outer tube

33: drain pipe 34: lower plate

35: inner tube spacer 36: outer tube spacer

40: upper floor

Field of invention

The present invention relates to a groundwater drainage structure for releasing positive pressure received by groundwater in underground structures such as buildings. More specifically, the present invention relates to a groundwater drainage structure in which a double pipe is formed inside a column of an underground structure, and groundwater can be easily drained through a double pipe from a perforated pipe installed in the ground. The present invention includes a drainage system that can correspond to the target groundwater level using the groundwater drainage structure.

Background of the Invention

In general, when underground structures are located below the water level, they are subject to positive pressure from groundwater. That is, due to such positive pressure, the underground structure receives a lifting force, and if the positive pressure is greater than the weight of the underground structure, a serious problem occurs that the underground structure is cracked or the building itself is inclined.

Conventional techniques for resolving the positive pressure caused by groundwater include a load loading method, a rock anchor installation method, a permanent de-watering method and the like.

The load loading method is a method to control the weight of underground structures. To overcome the positive pressure, the weight of the building foundation is increased by making the thickness of the foundation of the building thicker than normal or increasing the weight of the ground floor building to suppress the positive pressure caused by the groundwater. It is a construction method. However, this method is disadvantageous in that there is no countermeasure when the construction cost is high and the underground water level during the flooding blows to an unpredictable level and becomes higher than the level of the weight of the building.

The lock anchor installation method installs a number of earth anchors in the foundation of the building as much as the load of the insufficient building to fix the building itself to the ground so that the building can withstand the positive pressure. This method is disadvantageous in that the construction cost is very high and problems such as corrosion of the lock anchor itself occur.

The permanent drainage method is a method in which groundwater is collected through drainage channels arranged at regular intervals, guided to a sump well, and pumped to the outside so that positive pressure due to the underground water level flowing from the base of the underground structure is not formed. This method has the advantage of low construction costs compared to the above-described methods, but the maintenance costs such as electricity costs are high because the pump must continue to operate even if the water level below the level that can be received by the weight of the building.

Accordingly, the present inventors have made up for the shortcomings of the above-described permanent drainage method, and have developed a groundwater drainage structure in which a double pipe is installed inside a column of an underground structure, and a drainage system that can appropriately correspond to a target groundwater level.

An object of the present invention is to provide a groundwater drainage structure having a double pipe formed inside the pillar of the underground structure.

Another object of the present invention is to provide a groundwater drainage system that can cope appropriately with the target water level.

Another object of the present invention is to provide a groundwater drainage system having a lower construction cost than the lock anchor method.

Still another object of the present invention is to provide a groundwater drainage system that can reduce maintenance costs.

An object of the present invention is to provide a method for constructing a groundwater drainage structure having a double pipe formed inside the pillar of the underground structure.

The above and other objects of the present invention can be achieved by the present invention described below.

Summary of the Invention

Groundwater drainage structure according to the present invention,

A perforated tube 12 inserted into the perforated part 11 formed in the ground 10;

An inner tube 31 connected to the perforated tube through the foundation concrete 20 and having an upper portion open;

An outer tube 32 surrounding the outside of the inner tube and discharging the groundwater overflowing through the open portion of the inner tube through the inner wall; And

A drain pipe 33 connected to the outer pipe for discharging the groundwater to the outside;

It is made, including, the outer tube is characterized in that formed inside the pillar of the underground structure.

The groundwater drainage system corresponding to the target water level according to the present invention includes a plurality of groundwater drainage structures. The groundwater drainage structure as a structure corresponding to the target water level includes a plurality of target water level drainage structures 1 'whose height of the inner tube corresponds to the target water level; And a plurality of emergency water level drainage structures 1 "whose height of the inner tube corresponds to the emergency water level.

The drain pipe 33 "of the emergency level drainage structure 1" may be formed on the upper floor 40 according to the height of the emergency level.

On the other hand, the present invention includes a construction method of groundwater drainage structure consisting of the following steps:

(A) forming a perforation 11 in the ground of the underground structure, and filling the sand;

(B) inserting the hole tube 12 into the sand of the perforated portion 11 and making a bite;

(C) placing the foundation concrete 20 so that the perforated pipe 12 is exposed on the ground;

(D) connecting the inner tube 31 with an upper portion open to the hole tube;

(E) installing an outer tube (32) outside the inner tube; And

(F) constructing a pillar about the outer tube.

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

Detailed Description of the Invention

1 is a cross-sectional view of the groundwater drainage structure 1 according to the present invention.

As shown in FIG. 1, the drainage structure 1 according to the present invention is provided with a double pipe formed of an inner tube 31 and an outer tube 32 in a column of an underground structure, and connected to a lower portion of the inner tube. The perforated pipe 12 is inserted into the ground 10 through the foundation concrete 20.

The groundwater penetrating into the inside of the perforated pipe 12 from the ground 10 rises through the inside of the inner pipe 31 and reaches the upper end of the open inner pipe, overflows the outer wall of the inner pipe 31. And flow down the inner wall of the outer tube (32). The groundwater that flows out flows to a separate sump or drainage device (not shown) via a drain pipe 33 connected to the outer pipe 32. The structure of the water collecting well or the drainage device can be easily changed and implemented by those skilled in the art using a known method.

The perforation part 11 is perforated to insert the perforated tube 12 into the ground, and fills the sand inside thereof. Preferably, the perforated part is inserted into the perforated part in the state filled with sand, and the bite is made in this state.

The perforated tube 12 is connected to the inner tube 31, the perforated tube and the inner tube may be configured integrally, it may be used by connecting a separate tube. In the perforated tube, a plurality of holes through which groundwater is permeated is formed, and various types of perforated tubes conventionally used can be applied to the present invention.

The foundation concrete 20 is constructed in the state that the hole tube 12 is inserted. At this time, the perforated pipe 12 is to be exposed to the upper portion of the base concrete 20, the inner pipe 31 to be coupled to the perforated pipe. Other methods, such as screwing or welding, may be used for the coupling, but it is preferable to form a screw thread and a screw groove in the perforated pipe and the inner pipe to be coupled in the form of a screw. Meanwhile, in order to prevent cement from flowing into the perforation part 11 when the foundation concrete is constructed, a cement inflow preventing plate 13 may be installed outside the perforated pipe. In addition, the insertion hole 12 is installed to the horizontal reinforcing bar reinforcement to the outside of the perforated pipe so that the position is not shaken when the foundation concrete is laid and weave it well with the base reinforcement.

After the foundation concrete 20 is poured, the inner tube 31 is connected to the perforated tube, and the outer tube 32 is installed outside the inner tube. At this time, the lower plate is installed at the lower part for fixing the outer tube, and the outer steel pipe can be connected thereto. As the connection method, a welding method or a screw thread can be used. Preferably, a screw thread is formed on the outer tube to be screwed into the lower finger plate 34. At this time, one or more inner tube spacers 35 may be installed between the inner tube and the outer tube to maintain a constant gap between the inner tube and the outer tube.

After connecting the outer tube to install the outer tube spacer 36 to prevent the shaking of the outer tube, and connect the reinforcing bar and the outer tube of the column well. Then construct the columns. Through such a construction process, the groundwater drainage structure having the structure of FIG. 1 is completed.

The height of the inner tube is set in relation to the groundwater level. At this time, the height of the inner pipe is lower than the level of the building's own weight, so that the underground water pressure as much as the weight of the building can be allowed, and discharged when the level rises to the point B, the target level. It is desirable to.

2 is a cross-sectional view taken along the line AA ′ of FIG. 1. As shown in FIG. 2, the groundwater drainage structure according to the present invention has a form in which a double tube made of an inner tube 31 and an outer tube 32 is inserted into the pillar 30. The groundwater flowing between the inner tube and the outer tube is discharged to the outside through the drain pipe 33.

3 is a plan view (a) and a cross-sectional view (b) of the groundwater drainage system using the groundwater drainage structure according to the present invention.

As shown in Figure 3, the groundwater drainage system according to the present invention is made by installing a plurality of drainage structure in the underground structure provided with a double pipe inside the column.

In this case, if the height of C is called the maximum water level (emergency level) that the building can receive, and if A is the usual underground water level (water level) and B is the target water level, the target water level drainage structure 1 'is shown in Fig. 4. As in the case, when the groundwater level rises during the flooding, the height of the inner tube 31 'is set in accordance with the height of the target water level so that the building is not injured. In addition, the emergency water level drainage structure 1 "in case the groundwater drainage structure 1 'does not operate normally, as shown in Figure 5, the height of the inner tube 31" to the maximum height that the building can receive. Construct according to.

By installing two types of groundwater drainage structures in this way, the groundwater is discharged only from the target water level drainage structure 1 'among the groundwater drainage structures in the flood period, and there is a problem with the target water level drainage structure 1'. The emergency water drainage structure 1 "is also configured to discharge groundwater. When such a groundwater drainage structure is arranged, if the target water level drainage structure 1 'whose groundwater is discharged to the floodwater becomes ineffective, Since the groundwater is drained together by the water level drainage structure 1 ", it is possible to appropriately cope with the target water level in the flood season.

4 is an enlarged cross-sectional view of the target water level drainage structure 1 ′ of FIG. 3, and FIG. 5 is an enlarged cross-sectional view of the emergency water level drainage structure 1 ″ of FIG. 3. Similarly, when the height of the emergency water level C is higher than the bottom of the uppermost floor of the lowermost floor, a drain pipe 33 ″ may be formed on the upper floor 40.

The present invention provides a groundwater drainage structure that can cope with the target water level by forming a double pipe inside the pillar of the underground structure, has a lower construction cost than the lock anchor method, and can reduce maintenance costs, and a drainage system corresponding to the target water level using the same. Provided has the effect of the invention.

Simple modifications and variations of the present invention can be readily used by those skilled in the art, and all such variations or modifications can be considered to be included within the scope of the present invention.

Claims (9)

A perforated tube 12 inserted into the perforated part 11 formed in the ground 10; An inner tube 31 connected to the perforated tube through the foundation concrete 20 and having an upper portion open; An outer tube 32 surrounding the outside of the inner tube and discharging the groundwater overflowing through the open portion of the inner tube through the inner wall; And A drain pipe 33 connected to the outer pipe for discharging the groundwater to the outside; It comprises a, the outer tube is groundwater drainage structure, characterized in that formed inside the pillar of the underground structure. The groundwater drainage structure according to claim 1, further comprising a cement inflow preventing plate (13) on the upper portion of the perforated pipe. The groundwater drainage structure according to claim 1, further comprising a lower finger plate (34) coupled to the lower portion of the inner tube and the outer tube. The groundwater drainage structure according to claim 1, further comprising at least one inner tube spacer (35) between the inner tube and the outer tube. The groundwater drainage structure according to claim 1, further comprising at least one outer tube spacer (36) on the outside of the outer tube. A groundwater drainage system comprising a plurality of groundwater drainage structures according to any one of claims 1 to 5. According to claim 6, The groundwater drainage structure is A plurality of target water level drainage structures 1 'whose height of the inner tube corresponds to the target water level; And A plurality of emergency water level drainage structures 1 "whose height of the inner tube corresponds to the emergency water level; Groundwater drainage system, characterized in that consisting of. 8. The groundwater drainage system according to claim 7, wherein the drain pipe (33 ") of the emergency water level drainage structure (1") is formed on the upper floor bottom (40). (A) forming a perforation 11 in the ground of the underground structure, and filling the sand; (B) inserting the hole tube 12 into the sand of the perforated portion 11 and making a bite; (C) placing the foundation concrete 20 so that the perforated pipe 12 is exposed on the ground; (D) connecting the inner tube 31 with an upper portion open to the hole tube; (E) installing an outer tube (32) outside the inner tube; And (F) constructing a pillar about the outer tube; Construction method of groundwater drainage structure, characterized in that consisting of.

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