KR20020020008A - Construction method for water storage facilities keeping stable water storage level and preventing floation in underground - Google Patents

Abstract

PURPOSE: A construction method of underground water storing facilities is provided to restrain the buoyancy of a water tank, to control water level automatically and to construct strong storing facilities against earth pressure. CONSTITUTION: The construction method of underground water storing facilities(B) comprises the steps of excavating a storing space at the appointed depth by marking off an area required for utilizing underground water and placing footing concrete(3) on the bottom of the storing space, spreading a discharge sheet(5) from the upper part of the footing concrete(3) and to the surface of a column(2), forming a water tank(1) by piling water tubs in layers, installing an intake pipe(6) connected to a water intake well(20) with through holes on a lower through hole of a base water tub(7-1) and connecting an exhaust pipe(16) with intake/exhaust holes led to the air on the lower through hole of the uppermost water tub(7-N) to the surface of the earth, winding up the edge of a floor discharge sheet(18) and binding around the base water tank, covering a waterproof sheet from the uppermost water tank to the upper floor of the base water tank to flow filtered underground water into the through hole of the base water tank, and constructing a filtering layer by refilling up the surrounding space of the water tank with filter sand(11), charcoal(12), grit(13), fine aggregate(14) and soils(19) in orders.

Description

Construction method for water storage facilities keeping stable water storage level and preventing floation in underground}

The present invention quickly penetrates underground water and groundwater that fall down to green fields, playgrounds, parks, etc., such as parks, sports grounds, parking lots, etc., and then stores them in groundwater stockpiling facilities. It relates to a groundwater storage facility using a reservoir for useful use as greenery preservation water, agricultural water, drinking water, etc. when the supply is interrupted. In particular, it is possible to reduce the amount of water Stocking facilities using groundwater reservoirs, such as green water, which can be used as safe water level in the reclaimed ground and underground tanks by reducing the buoyancy to underground reservoirs by reducing the automatic water level control function. It relates to the construction method of the.

If a lot of rain suddenly falls on green spaces of the city, green fields such as playgrounds, parks, etc., or if it rains continuously for a long time, some of the water penetrates underground and rainwater that can no longer seep flows through the drains into the river. Rainwater capacity in the ground is limited, depending on geology. Rainwater that the land has not accepted simply flows out into the river. During heavy rains and heavy rains, the rainwater drained through the drains causes flooding and damage to floods.

In view of these problems, a technique has been proposed to bury water tanks combined with synthetic resin reservoirs in the ground to filter the water that penetrates into the basement during rainfall and collect and use it when necessary. This prior art uses a rectangular reservoir, where the outer wall of the rectangular reservoir is weak to loads acting above or earth pressure acting in the transverse direction. If the outer wall is weak to the transverse pressure in this way, the volume of the reservoir after the construction is reduced, affecting the storage volume, in extreme cases may cause the Buddha landscaping part of the reservoir buried because it does not beat the upper earth pressure.

In addition, the underground water storage facility is a closed underground space except for the passage of rainwater due to the waterproof sheet, backfill crushed stone, and soil cover of the external soil layer. It had to be vented to the outside immediately, which did not have such a structure. If it is difficult to smoothly exhaust the internal air of the underground reservoir, the entire underground reservoir may be buoyant and carry the most vulnerable part close to the surface, or the entire underground reservoir may be raised or damaged. Therefore, appropriate measures should be taken to suppress the rise of underground reservoirs. On the other hand, when using underground water in the underground reservoir, the external air must flow into the underground reservoir as quickly as the amount of intake to prevent evacuation, so that it is not difficult to collect the groundwater. There is a need to work together.

On the other hand, in order to maintain a stable water level, the automatic pump is operated so that the ratio of the synthetic resin reservoir, which is the basis of the underground reservoir, is 0.97, even if it exceeds 95% or 100% of the proper freshwater volume of the underground reservoir during heavy rain. Since there is a possibility that a stable structure can not be maintained due to the buoyancy of the buoyancy, it is necessary to maintain an appropriate level, but the prior art has no countermeasure.

In addition, the conventional groundwater reservoir only serves to contain rainwater that penetrates into the ground, which is not suitable for using the groundwater as drinking water.

An object of the present invention is to preserve green water, agricultural water, and sanitary drinking water at the time of trapping a lot of rainwater and groundwater, which are located in grassland such as green spaces of rivers, riverbeds, valley entrances, school grounds, school grounds, etc. The groundwater stockpiling facility using groundwater reservoir is designed to prevent buoyancy and automatic control of the water level, and to build a stockpiles resistant to earth pressure. To provide.

1 is an exploded view of the groundwater reservoir member

2 is an assembly view of the reservoir

3 is a cross section of the groundwater stockpiles and water wells

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

A: Groundwater reservoir B: Groundwater storage facility

C: Intake Well 1: Reservoir

3: foundation concrete 4,5,18: spinning sheet

6: water intake pipe 7: water reservoir

10: waterproof sheet 11: filter yarn

12: charcoal 13: coarse sand

14: fine aggregate 15: coarse aggregate

16 exhaust pipe 19 cover

20: water intake well 21: pumping pump

The present invention consists of a groundwater reservoir (A), groundwater storage facility (B) and water intake well (C).

In FIG. 1, the groundwater reservoir A is composed of a synthetic resin conical reservoir 7 having a trapezoidal cross section, a flange connector 8, 81, and a bottom connector 9. The reservoir (7) has a flange (7a) around the mouth, and the sole of the flange (7a) between the front and rear, left and right, and the top and bottom reservoirs when the mouth is placed upside down or placed on the lower reservoir, The pin hole 7b for connecting with the flange connector 8 is drilled, and the upper wall and the lower hole hole 7c, 7d for penetrating the water into the reservoir 7 are drilled in the main wall. When placed facing each other, the pin hole 7e for connecting to the bottom connector 9 is drilled. In the present invention, the reservoir 7 is changed to a conical reservoir, thereby increasing the resistance against the surrounding earth pressure and the support stress against the upper earth pressure, thereby improving durability.

2 shows the stacking instructions of the reservoir 7. The individual flanges (7a) are positioned upside down on each reservoir (7) of the basal reservoir (7-1), and the individual flanges (7a) for each position are flanged connections (8) or bidirectional flanged connections at that location. It mounts in the upper pin 8a of 81, and combines the two-layer water storage column 7-2. All the reservoirs (7-2) of the second-level reservoir column (7-2) are inserted into the bottom pin hole (7e), the lower pin (9b) of the bottom connector (9), and lowered another reservoir (7) that is upright The bottom pin hole 7e is inserted into the upper pin 9a of the bottom connector 9 to combine the three-layer water reservoir 7-3. In this way, the reservoirs are constructed by combining the odd and even rows of reservoirs and combining the last reservoir rows (7-n).

Groundwater storage facility (B) of FIG. 3 is to induce rainwater that penetrates into the surface to be quickly and effectively confined to the ground and to confine the groundwater to be easily collected. The construction sequence is as follows.

In other words, the groundwater reservoir (1) is created by selecting the area where groundwater needs to be utilized during the dry season, and excavating to the position below the average groundwater level (5.0 ~ 7.0M) by the required area according to the design. After adjusting the bottom of the groundwater reservoir (1) flat and arranging the main surface (2) with a smooth slope, the foundation concrete (3) is poured and the spinning sheet (4) is laid from above the foundation concrete (3) to the top of the slope. The foundation concrete (3) is necessary to prevent the sinking of the storage device and to maintain the attitude of the reservoir in the ground, and the spinning sheet (4) isolates the groundwater infiltration layer and the non-excavated ground to provide stability and prevent the inflow of groundwater into the unexcavated ground. It is necessary to facilitate.

On the bottom base, a wider spinning sheet 5 is laid, and the base reservoir rows 7-1 combine the reservoirs 7 so that the lower holes 7d lie in line with each other. 7) Install a water intake pipe 6 through which the water hole is drilled in the lower water hole 7d. The water intake pipe 6 drills the water intake hole 6a only in a portion of the water reservoir area so that only the filtered ground water can be taken in. The rear end of the water intake pipe 6 is connected to the water intake pipe side described later.

On the radiating sheet 5, the water intake pipe 6 is deflected, and the layer layer is entangled with a corrosion resistant steel wire or a rope so as not to be disturbed by stacking the reservoirs 7 vertically and horizontally.

In this way, a reservoir is installed on the spinning sheet 5 in the area of the bottom concrete 3, and the edge of the spinning sheet 5 protruding out of the bottom reservoir line 7-1 is folded up to form a bottom layer with a rope or a corrosion resistant wire. It is enclosed by the column of water (7-1). Subsequently, the upper surface and the periphery of the reservoir are covered with the waterproof sheet 10 to prevent groundwater from being introduced except the base reservoir reservoir 7-1.

The remaining space occupied by the reservoir in the groundwater storage facility (1) is filled from the bottom to the surface in order of filter sand (11), charcoal (12), coarse sand (13), fine aggregate (14), and coarse aggregate (15). At the same time to facilitate the inflow of surface water, foreign matters are filtered and sterilized in the inflowing groundwater, and then introduced into the water hole 7c of the base reservoir 7-1.

The coarse aggregate 14 fills up to just below the lower through-hole 7d of the uppermost reservoir of heat (7-n), and then the exhaust pipe having the intake and exhaust holes perforated in the lower through-hole (7d) of the uppermost reservoir of heat (7-n). Insert (16). The exhaust pipe 16 is required to smoothly exhaust the internal air and gas into the atmosphere when the groundwater fills the reservoir, so that the groundwater can smoothly flow into the reservoir and prevent the reservoir from floating due to the buoyancy of the air.

After the exhaust pipe 16 is hypothesized, it is filled with the coarse aggregate 15 up to a predetermined height, and the space above is filled with the soil sand 17 to recover. When the groundwater storage facility (B) is installed in the basement of a place such as greenery or grassland or a playground, the radiating sheet 18 is laid on the coarse gravel layer 15 and covered to the surface part 19.

Water that penetrates underground from rainwater falling on the surface, greenery or grassland passes through the radiating sheet 18 or directly through the coarse aggregate 15 layer, and then passes through the fine aggregate 14 layer and the coarse sand 13 layer. Foreign matter is filtered, deodorized and sterilized while passing through the charcoal (12) layer, and then passed through the filtrate (11) layer to change into clear water, and then passed through the spinning sheet (5) of the base water reservoir (7-1). It flows into the water passages 7c and 7d.

The greater the amount of groundwater flowing through these routes, the higher the level in the reservoir. As the water level in the reservoir rises as described above, air and gas on the surface of the water rise and rise through the exhaust pipe 16 to the atmosphere. This timely exhaust of internal air helps inflow of groundwater into the reservoir and offsets the buoyancy acting on the underground reservoir with natural exhaust and air supply to prevent the groundwater and its fragile backfill from rising and preventing or preventing the ground from rising or rising. do. Intake of groundwater is easy because the inflow of external air is controlled by the decreasing water level.

On the other hand, the intake well (C) installs the intake well (20) next to the groundwater storage facility (C) and pumping pump (21) next to the intake well (20) on the ground to the reservoir of the groundwater storage facility (B) The groundwater is pumped and used as water for the necessary purposes. In particular, according to this underground water storage, all kinds of miscellaneous matters are filtered while sterilization is carried out by the charcoal layer while rainwater flows down through the multi-layered filtration layer, so it is hygienic enough to be drinkable as it is clean and clean like spring water. Groundwater level control is achieved with a water intake using a pump pump 21 equipped with an automatic water level detection device. Reference numeral 22 denotes a pumped groundwater channel.

As described above, the present invention is a water tank stacked in a conical reservoir that is strong in lateral earth pressure and vertical earth pressure, showing excellent stability in the ground, and always helps to take in and use sufficient amount of groundwater required at all times. In addition, the landfill site above the reservoir is stabilized.

In addition, only the groundwater filtered by the underground filtration layer flows in through the bottom of the reservoir and gradually rises.In this case, the internal air and gas are scattered in the air in the air in the exhaust pipe in time, and the automatic supply is made corresponding to the water level lowered when intake. There is no obstacle in the inflow and withdrawal of groundwater, and when the groundwater is filled, the floating pressure of the reservoir is always maintained at zero level, which can stabilize not only the reservoir but also the reclaimed ground above the reservoir.

For example, if this facility is installed at an effective reservoir depth of 7.0M in the area corresponding to the football field area, 75,000 tons of water resources will be stored, and if the water level is lower than the surrounding groundwater level due to water intake, As it is possible to secure more than 2-3 times the water resources of 75,000 tons, the water supply problem of at least 400,000 to 1.2 million households can be solved, considering that Seoul citizens have 200 liters of daily water consumption per day. It is a very economical underground water storage facility that can prevent the waste of budget and destruction of the natural environment, and does not have to enormous land area.

Claims (3)

By dividing the area where groundwater utilization is desired, excavate the reservoir space to a certain depth, and install the foundation concrete on the bottom of the reservoir space, install the radiating sheet on the upper part of the foundation concrete and the top of the main surface, The upper and lower layers are formed by stacking water tanks together to form a water tank, and a water pipe is installed in the lower water hole of the base water reservoir, and the water inlet pipe leading to the water intake pipe is drilled. To the ground surface, and the bottom radiating sheet is edged up and tied around the base reservoir, and then surrounded by a waterproof sheet from the top reservoir to the top of the base reservoir so that the groundwater filtered through the bottom reservoir flows only. The ground around the reservoir The four filtration, charcoal, coarse sand, fine aggregate, coarse aggregate, construction method of underground storage facilities characterized in that the bridges are built-applied in the order of the filter layer. The method for constructing a groundwater storage facility according to claim 1, wherein a water intake well communicating with a water intake pipe is installed next to the groundwater storage facility to collect groundwater from the reservoir with a pump. The method of claim 2, wherein the pump pump is equipped with an automatic water level detection device to automatically detect the water level in the reservoir to maintain the proper level.