KR102451462B1 - Free section type rainwater storage tank and its construction method - Google Patents

Abstract

The present invention relates to a rainwater storage tank installed underground to prevent disasters due to heavy rain. According to the present invention, the rainwater storage tank is characterized in that an outer rim is formed by a plurality of outer circumferential pipe blocks in which an outer circumferential upper plate is installed on the upper part and an outer circumferential lower plate is installed on the lower part, an inner main pipe block in which an inner circumferential upper plate is installed on the upper part and an inner circumferential lower plate is installed on the lower part is located in an inner space formed by the outer rim, a rainwater inlet pipe is installed in at least one of the outer circumferential pipe blocks, a rainwater discharge pipe is installed in one of the outer circumferential pipe blocks in which the rainwater inlet pipe is not installed, and among the outer and inner circumferential pipe blocks, at least the outer circumferential pipe block is formed in a rectangular cross section.

Description

Free section type rainwater storage tank and its construction method

The present invention relates to a rainwater storage tank installed underground to prevent flooding of the ground such as roads by temporarily storing rainwater to prevent disasters due to heavy rain and then draining it after the rain stops, and to a construction method thereof.

As efforts to maximize land use increase, the ratio of impervious area where rainwater cannot penetrate into the ground continues to increase. For example, in the case of idle land, it is common to form a block or concrete floor layer on the ground surface to be used as a parking lot. Accordingly, when heavy rain falls, rainwater cannot penetrate into the ground, and flooding occurs in urban areas due to insufficient capacity of drainage facilities.

In addition, since heavy rains occur frequently due to climate change, damage from flooding per unit area is greater, especially in urban centers where buildings are dense. At this time, the rainwater storage tank installed underground plays an important function to protect water resources as well as to prevent the above-mentioned flood damage.

Patent Registration No. 10-1321992 relates to the above-described rainwater storage tank, and as shown in FIG. 1 , at least one inlet block 10 through which rainwater flows through the inlet 14; A plurality of storage blocks (20) installed in the vicinity of the inlet block (10) to be in fluid communication through the passageway (50) and for storing the rainwater introduced into the inlet block (10); At least one discharge block 30 is installed in the storage block 20 to be in fluid communication through the passageway 50 and guides the discharge of rainwater stored in the storage block through the discharge unit 24. and the inlet block 10, the storage block and the discharge block are made of a bottom plate, a wall that is built on the bottom plate and forms a rainwater storage unit therein, and a wall that forms the passageway, and a ceiling plate coupled to the upper part of the wall. It is connected in fluid communication through the water passage, and the inlet block 10 and the storage block and the discharge block are formed in a cylindrical shape and are connected with a space therebetween, and the space is filled with concrete to form a column, In addition, a sluice gate 60 for opening and closing the water passage formed between each block is installed and a water level sensor is installed.

In the rainwater storage tank of Registration No. 10-1321992 configured in this way, when the rainwater flowing into the inlet block through the inlet is stored to a certain water level, the sluice gate 60 opens the water passage according to the detection of the water level sensor and the storage block 20 When the rainwater stored in the storage block 20 reaches a certain water level, the water passage is opened in the same way to sequentially flow to the adjacent storage block 20, and then to a predetermined water level in all storage blocks 20 When stored, the water passage is opened by the sluice gate 60 located between the discharge block and rainwater is discharged to the outside through the discharge unit 24 located at the lower part of the discharge block.

However, in the rainwater storage tank of Registration No. 10-1321992, the water passage is opened only when rainwater rises to a certain water level in the inflow block and the storage block. There is a problem that the space cannot be used sufficiently, and the space between each block cannot be used as a storage space for rainwater due to the concrete filling, so there is a limit to the storage capacity. In addition, since the flow of rainwater is made only through the water passage between each block, the storage and drainage of rainwater cannot be carried out promptly during rain, so that the function of the storage tank is not fully exhibited.

In addition, since the blocks 10, 20, and 30 have a structure in which the lower part is blocked, there is a risk of floating upward due to buoyancy when the groundwater level rises.

US 10-1321992 B1

The present invention is intended to solve the above problems of the prior art, and it is possible to freely form the planar shape of the storage tank, thereby enabling universal application to various installation environments of the storage tank, and maximizing the storage space of the installed storage tank. An object of the present invention is to provide a rainwater storage tank having a structure that enables efficient construction of a storage tank, which is structurally stable and easy to construct, and enables economical construction of a storage tank, and a method for constructing the same.

According to the most preferred embodiment of the present invention for solving the above problems, the outer periphery is formed by a plurality of outer perimeter blocks in which the outer peripheral upper plate is installed on the upper part and the outer peripheral lower plate is installed on the lower part, and the inner peripheral upper plate is installed on the upper part An inner peripheral block installed and having an inner peripheral lower plate installed therein is located in the inner space formed by the outer perimeter, and at least one of the outer peripheral blocks is provided with a rainwater inlet pipe, and the rainwater inlet pipe is not installed. A rainwater discharge pipe is installed in any one of the main blocks, and at least an outer peripheral block of the outer peripheral block and the inner peripheral block is provided with a free cross-section type rainwater storage tank, characterized in that it is formed in a square cross section.

In this case, the outer peripheral blocks adjacent to each other may closely contact each outer surface, and the inner peripheral blocks adjacent to each other may space each outer surface apart to form a space therebetween. The lower portion of the interspace may be filled with gravel.

In addition, the outer circumferential top plate of each outer circumferential block in which the rainwater inlet pipe and the rainwater outlet pipe are installed can be composed of an openable and openable manhole cover.

In addition, the outer peripheral upper plate and the outer peripheral lower plate are configured to have the same rectangular cross section as the outer peripheral surface of the outer peripheral block, and the inner peripheral upper plate and the inner peripheral lower plate are configured to have a larger rectangular cross section than the outer peripheral surface of the inner peripheral block, while the outer peripheral lower plate and the inner peripheral lower plate An opening may be provided in each center, and a hemispherical groove may be provided to form another opening when connected to the inner peripheral lower plate adjacent to the edge of the inner peripheral lower plate.

In this case, the length of one side of the inner periphery and the lower plate may be formed as a multiple of the length of one side of the outer periphery and the lower plate.

In addition, while forming each inner columnar plate installed on the upper portion of the inner peripheral block as one slab having the same plane, the end of the slab can be configured to support the outer surface of the outer peripheral block.

Insertion projections are formed on the outer periphery, the lower plate and the inner periphery, and the bottom and upper surfaces of the lower plate, so that the insertion protrusion is inserted into the outer peripheral block and the inner peripheral block.

In addition, a gravel layer for the passage of rainwater can be formed in the lower part of the outer peripheral lower plate and the inner peripheral lower plate, and a tarpaulin can be further installed in the lower part.

In addition, by forming a through hole communicating with each other in the outer peripheral block and the inner peripheral block, it is possible to configure another passage of rainwater.

A filter layer is installed on the outer perimeter block in which the rainwater inlet pipe is installed, and a collection bag equipped with mesh eyes through which rainwater can pass can be installed on the upper part of the filter layer to facilitate the management of filth.

In another embodiment of the present invention, a pumping means is installed inside the outer circumferential block in which the rainwater discharge pipe is installed, a raindrop detector is installed outside the storage tank installation space, and the rain stoppage duration after checking the condition of the raindrop detector If this continues for more than a set time, a control means is installed to command the pumping means to operate so that the rainwater is discharged to the outside through the rainwater discharge pipe.

The construction of the rainwater storage tank includes the steps of: a) installing a tarpaulin on the excavation bottom surface after excavation; b) forming a gravel layer on the upper surface of the tarpaulin installed on the bottom of the excavation; c) arrange an outer peripheral lower plate and an inner peripheral lower plate on the upper surface of the gravel layer, but the outer peripheral lower plate is arranged on the outer rim adjacent to the excavation slope formed by the excavation in step a), and the inner peripheral lower plate is arranged inside the rim, forming one flat plane with a lower plate and an inner peripheral lower plate; d) Insert the insertion protrusions provided on the upper surfaces of the outer and inner lower plates into the lower ends of the outer and inner tube blocks to complete the installation of the outer and inner tube blocks. Installing the outer peripheral block and the inner peripheral block so as to be in close contact with each other and the adjacent inner peripheral blocks are spaced apart to form a space therebetween; e) Backfill between the excavation slope and the outer block, and fill the lower portions of the space between the outer block and the inner block and the space between the inner block and the inner block with gravel. fixing the lower part of the block; f) completing the installation of the outer peripheral upper plate and the inner peripheral upper plate by inserting the insertion protrusions respectively formed on the lower surfaces of the outer peripheral upper plate and the inner peripheral upper plate on the upper portions of the outer peripheral block and the inner peripheral block; g) The step of installing the flooring material on at least the upper part of the inner periphery of the outer perimeter top plate and the inner perimeter top plate except for the portion where the manhole cover is installed; is made in sequence.

The present invention can stably support the back earth pressure of the storm water storage tank without installing a retaining wall by forming a support structure between the outer peripheral block and the inner peripheral plate, and a storage space is formed in the outer peripheral block functioning as a retaining wall, By forming a storage space between the main blocks, it is possible to form an economical rainwater storage tank by minimizing unnecessary member cross-section and maximizing the storage space.

In addition, the present invention has versatility to form a rainwater storage tank with a cross section of a shape suitable for site conditions, since the outer peripheral pipe block having the above-described retaining wall function can be freely arranged.

In addition, the present invention not only improves the efficiency of storage because the entire storage space is filled with the same water level, but also has an open lower part of the storage space, so there is no room for levitation of the rainwater storage tank due to the rise of the groundwater level, and deformation occurs. By not doing so, durability is increased.

In addition, the present invention is purified by filtering in the inflow step of rainwater, and since a detachable collection bag is installed, it is easy to manage, thereby preventing contamination of water resources.

In addition, in the present invention, when the flow of rainwater is not smooth due to the occurrence of heavy rain or maintenance, direct drainage is made through the through hole, so the room for submersion of the ground is minimized.

1 is a plan view and a cross-sectional view of a rainwater storage tank according to the prior art.
2 is a plan view of a rainwater storage tank according to the present invention.
FIG. 3 is a cross-sectional view taken along line AA of FIG. 2 .
FIG. 4 is a cross-sectional view of a portion BB of FIG. 2 .
5 is a perspective view of the outer peripheral block constituting the rainwater storage tank of the present invention.
6 is a perspective view of the inner main block constituting the rainwater storage tank of the present invention.
7 is a perspective view of a state in which the inner peripheral blocks are arranged and a bottom view thereof.
8 to 15 are explanatory views for each step of the method of constructing the rainwater storage tank of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in the description of the present invention, in the case of obscuring or obscuring the technical idea of the present invention due to the detailed description of the known configuration, the description of the above known configuration will be omitted.

2 is a plan view of the rainwater storage tank according to an embodiment of the present invention, FIG. 3 is a cross-sectional view of a portion A-A of FIG. 2, and FIG. 4 is a cross-sectional view of a portion B-B of FIG.

2 to 4, in the rainwater storage tank of the present invention, an outer rim is formed to fit the available land, and a tarpaulin 111 is installed on the outer excavation slope 110 of the outer rim, and the outer rim A backfilling material 130 such as coarse aggregate is filled between the tarpaulin 111 of the excavation slope 110 and the excavation slope 110 .

The outer rim is formed by a plurality of outer peripheral blocks 210, and functions as a retaining wall to resist earth pressure on the rear surface of the rainwater storage tank together with the backfilling material 130, while forming a storage space of rainwater by itself.

This outer peripheral block 210 has a Hume tube structure of a square cross-section, so that even if it is not parallel to the adjacent outer peripheral block 210 and is displaced, a state in close contact therebetween can be maintained.

5 shows the outer peripheral block 210 formed in a square cross-section like the latter.

The outer peripheral upper plate 220 is installed on the upper part of the outer peripheral block 210, and the outer peripheral lower plate 230 is installed on the lower part. At this time, it is preferable that the outer peripheral upper plate 220 and the outer peripheral lower plate 230 have the same rectangular cross-section as the outer peripheral block 210, so that there is no restriction on the arrangement shape of the outer peripheral block 210 described above.

In addition, by forming an opening 231 in the center of the outer peripheral lower plate 230, buoyancy caused by groundwater, etc. is prevented, and rainwater fills up through the opening 231 or flows to the inner peripheral block 310 to be described later. let it be

As shown in FIG. 2, a rainwater inlet pipe 241 is installed in at least one of the outer peripheral block 210 that forms an outer edge by being continuously arranged, and when it rains, the rainwater inflow pipe 241 of the present invention is provided through the rainwater inlet pipe 241. By allowing rainwater to flow into the storage space of the storage tank for temporary storage, disasters such as flooding of the ground are prevented.

As shown in FIG. 3 , a filter layer 250 for filtering dirt is installed in the outer peripheral block 210 in which the rainwater inlet pipe 241 is installed. The filter layer 250 may have various structures, and in one embodiment, gravel 251 and sand 252 form each layer, and rainwater introduced through the rainwater inlet pipe 241 is It passes through the filter layer 250 composed of gravel 251 and sand 252 and flows into the storage space such as the adjacent outer peripheral block 210 to the inner peripheral block 310 to prevent clogging of pipelines and prevent contamination of rainwater. do.

A collection bag 253 for collecting the filtered dirt may be installed on the filter layer 250 . The collection bag 253 is provided with a mesh eye through which rainwater can pass, and is installed so that it can be removed from the inner surface of the outer peripheral block 210 .

Of course, as described above, the manhole cover 220a that can be opened and closed is installed on the outer peripheral top plate 220 of the outer peripheral pipe block 210 in which the rainwater discharge pipe 242 is installed, or the outer peripheral top plate 220 itself can be opened and closed. ) to enable replacement of the collection bag 253 by an operator.

In addition, the rainwater discharge pipe 242 is installed in any one of the outer peripheral pipe blocks 210 in which the rainwater inlet pipe 241 is not installed among the above-described outer peripheral pipe blocks 210, and when the rain stops, it was stored in the rainwater storage tank of the present invention. By allowing rainwater to be discharged to the outside through the rainwater discharge pipe 242, the rainwater storage tank maintains an empty space. The empty space of this rainwater storage tank enables sufficient preparation for future rainwater.

For this purpose, a pumping means 412 is installed inside the outer peripheral block 210 in which the rainwater discharge pipe 242 is installed, and a raindrop detector 411 is installed outside the storage tank installation space (outside the rainwater storage tank). The pumping means 412 is operated by the control means 413 . Of course, the operation of the pumping means 412 is configured to be possible even by manual operation.

According to the configuration of the above-described embodiment, when a non-stop state is confirmed by the rain detector 411, the rain detector 411 transmits it to the control means 413, and the control means 413 that receives it continues the non-stop When the time continues for more than a set time, the pumping means 412 is commanded to operate so that rainwater in the storage space can be discharged to the outside through the rainwater discharge pipe 242 . When all the rainwater discharge in the storage space is completed, the pumping means 412 automatically stops the operation.

Like the outer peripheral block 210 in which the rainwater inlet pipe 241 is installed, the manhole cover 220a that can be opened and closed is installed on the outer peripheral upper plate 220 of the outer peripheral pipe block 210 in which the rainwater discharge pipe 242 is installed, or the outer peripheral upper plate ( 220) It is preferable to enable the operator to manage the pumping means 412 by configuring itself as a manhole cover 220a that can be opened and closed.

An inner peripheral block 310 is installed in the inner space of the outer rim formed by the outer peripheral block 210 .

The outer circumferential block 210 functions as a retaining wall to support earth pressure while forming the outer rim as described above with the formation of the storage space, so that the outer circumferential block 210 is installed so that each outer surface is in close contact with each other. desirable. On the other hand, the inner peripheral block 310 does not necessarily have a structure in close contact with each other.

Therefore, in one embodiment of the present invention, each outer surface is spaced apart from each other between the inner peripheral blocks 310 to form an interspace (S), thereby maximizing the storage space and minimizing the use of members. That is, the present invention minimizes the area occupied by the inner main block 310 itself, and the space (S) between the inner main blocks 310 also functions as one of the storage spaces. to maximize

Therefore, the inner circumferential block 310 has a free cross-sectional shape, unlike the outer circumferential block 210 . For example, it may be formed in a square cross-section in the same way as the outer peripheral block 210, but may be formed in a circular cross-section.

6 shows an example in which the inner peripheral block 310 is formed in a circular cross-section as in the latter, and FIG. 7 shows an example in which the inner peripheral block 310 is disposed to be spaced apart from each other.

An inner peripheral upper plate 320 is installed on the upper portion of the inner peripheral block 310 , and an inner peripheral lower plate 330 is installed on a lower portion of the inner peripheral block 310 .

The inner peripheral upper plate 320 and the inner peripheral lower plate 330 have the same cross-sectional length, and have a larger square cross-section than the outer cross-section of the outer peripheral block 210 . For example, the inner circumferential top plate 320 has a larger area than the outer circumferential block 210 by the interspace S formed by them. Accordingly, as shown in (a) of FIG. 7, each inner columnar plate 320 installed on the upper part of the inner peripheral block 310 is interconnected to form one slab having the same plane, thereby forming a slab having the same plane as described below. It may have a function of a brace for supporting the outer surface of the main block 210 .

Like the outer peripheral lower plate 230, the inner peripheral lower plate 330 is also formed with an opening 331 in the center. The opening 331 of the inner peripheral plate 330 also prevents buoyancy caused by groundwater, etc., and allows rainwater to be stored through the opening 331, or an inner peripheral block 310 having a rainwater discharge pipe 242. ) to allow it to flow.

In addition to this, a hemispherical groove 332 is further provided on the edge of the inner peripheral lower plate 330 . The hemispherical groove 332, as shown in FIG. 7 (b), forms an opening 331a together with the hemispherical groove 332 provided therein when connecting with the adjacent inner peripheral lower plate 330, This allows rainwater to be stored in the interspace (S).

At this time, by forming the gravel layer 140 under the outer peripheral lower plate 230 and the inner peripheral lower plate 330 to make the gap between the gravel layer 140 function as a passage for rainwater, the above-described rainwater flow in the storage space is smoothly achieved. can make you lose A tarpaulin 111 is installed under the gravel layer 140 .

Each storage space secured by the outer circumferential block 210 and the inner circumferential block 310 and the interspace S is filled up from the bottom while having the same water level as a whole by the gravel layer 140, which is caused by heavy rain, etc. When the storage space is difficult to handle due to this, or when rainwater does not pass through the filter layer 250 quickly due to non-collection of dirt, the through-holes 243 and 343 described below for allowing rainwater to be discharged directly to the outside function efficiently make it work

The through holes 243 and 343 are respectively formed in the outer peripheral block 210 and the inner peripheral block 310 at the same height as the position of the rainwater inlet pipe 241 located on the upper side of the outer peripheral block 210, and each of these through The holes 243 and 343 communicate with each other to form a single drainage passage and are connected to the rainwater discharge pipe 242 .

On the other hand, the outer peripheral lower plate 230 and inner peripheral lower plate 330, which function as a passage for rainwater, form a base surface for the outer peripheral block 210 and the inner peripheral block 310, and on the other hand, a structure in which they are installed. to ensure the stability of

Insertion protrusions 223,233,323,333 are formed on the bottom and upper surfaces of the outer peripheral upper and lower plates 220 and 230 installed in the upper and lower portions of the outer peripheral block 210 and the inner peripheral upper and lower plates 320 and 330 installed in the upper and lower portions of the inner peripheral block 310, respectively. do.

The insertion protrusions 223 and 323 protruding downward from the respective bottom surfaces of the outer circumferential top plate 220 and the inner circumferential top plate 320 are inserted into the inner space of the outer circumferential block 210 and the inner circumferential block 310 so that they are integrally formed. allow it to move.

Meanwhile, in an embodiment of the present invention, the height of the inner peripheral block 310 is slightly lower than that of the outer peripheral block 210, so that the inner peripheral upper plate 320 of the inner peripheral block 310 adjacent to the outer peripheral block 210 has an end. It is configured to be in contact with the outer surface of the outer peripheral block 210 .

Accordingly, the inner circumferential top plates 320 forming one slab support the outer circumferential pipe block 210 that receives the back earth pressure together with the inner circumferential pipe blocks 310 located thereunder without installing a separate retaining wall structure on the outside. It also enables the construction of structurally stable stormwater storage tanks.

At this time, since the lower portion of the inner peripheral block 310 is fixed by the insertion protrusion 333 of the inner peripheral lower plate 330 as described later, the occurrence of displacement of the inner peripheral upper plate 320 acting integrally therewith can be prevented. However, by filling the lower portion of the interspace (S) with gravel 141, it is possible to achieve a stronger position fixation with respect to the inner peripheral block 310.

The filling of the gravel 141 for the above-described interspace (S) is appropriate to 1/3 of the height, and it is preferable not to exceed the maximum 1/2 so that the storage space is not excessively reduced.

In the upper part of the slab formed by the inner columnar plate 320, the step difference with the outer columnar plate 220 is eliminated through the floor material F such as concrete, and the spiking deformation does not occur in the connection portion of the inner columnar plate 320. desirable.

The insertion protrusions 233 and 333 protruding upward from each upper surface of the outer peripheral lower plate 230 and the inner peripheral lower plate 330 are also inserted into the inner space of the outer peripheral block 210 and the inner peripheral block 310, so that they are integrally formed By making it moveable, deformation due to positional movement or the like does not occur in the outer peripheral block 210 and the inner peripheral block 310 .

In addition, the insertion protrusions 233 and 333 of the outer peripheral lower plate 230 and the inner peripheral lower plate 330 indicate the exact position where the outer peripheral pipe block 210 and the inner peripheral pipe block 310 should be arranged during the construction process of the rainwater storage tank, thereby improving workability. improve

8 to 14 are respectively shown with respect to the steps of constructing the rainwater storage tank of the present invention described above.

a) First, after excavation, the tarpaulin 111 is installed on the excavation slope 110 and the bottom surface (FIG. 8).

It is preferable that the excavation be made in a state in which the stability of the soil is maintained by the angle of repose. When the excavation is completed, the excavation bottom surface 120 should be compacted to prevent subsidence of the rainwater storage tank in the future. If necessary, ground improvement means such as support piles may be applied.

When the arrangement of the inner surface of the excavation is completed, the tarpaulin 111 is installed on the excavation slope 110 and the excavation bottom surface 120 .

b) The gravel layer 140 is formed by laying the gravel 141 on the upper surface of the tarpaulin 111 installed on the excavation bottom surface 120 (FIG. 9).

The gravel layer 140 serves as a passageway for rainwater that allows rainwater to fill all the storage spaces together as described above, and at the same time, in the load and storage space of the outer peripheral block 210 and the inner peripheral block 310, etc. It serves as a foundation to support the load of the temporarily stored stormwater.

The upper surface of the gravel layer 140 is flat, so that the outer peripheral lower plate 230 and the inner peripheral lower plate 330 installed on the upper surface form a single flat plane.

c) When the formation of the gravel layer 140 is completed, the outer peripheral lower plate 230 and the inner peripheral lower plate 330 are disposed on the upper surface ( FIGS. 10 and 11 ).

The outer peripheral lower plate 230 is disposed on the outer rim adjacent to the excavation slope 110, and the inner peripheral lower plate 330 is disposed on the inside of the outer rim, that is, on the inside of the outer peripheral lower plate 230, forming a flat plane with them. .

On the other hand, as described above, the present invention does not install a separate retaining wall for supporting the earth pressure, but forms a mutually close structure so that the outer peripheral block 210 itself can support the earth pressure, and on the other hand, maximize the storage space. For this, a space (S) is provided between the inner peripheral blocks (310). Accordingly, the outer peripheral upper and lower plates 220 and 230 and the inner peripheral upper and lower plates 320 and 330 have different specifications, so that the outer peripheral lower plate 230 and the outer peripheral lower plate 230 form one and the same flat plane, or It is not easy for the inner circumferential top plates 320 connected to have a flat plane to contact and support the outer circumferential block 210, which is another problem in the present invention, which is universal for various storage tank installation environments, such as shape. There is room to act as a factor limiting what can be applied.

However, the above-mentioned limiting factor is easily solved by forming the length of one side of the inner circumference upper and lower plates 320 and 330 to be a multiple of the length of one side of the outer circumference upper and lower plates 220 and 230 . 2 illustrates a case where the length of one side of the inner periphery upper and lower plates 320 and 330 is twice the length of one side of the outer periphery upper and lower plates 220 and 230 .

d) When the arrangement of the outer peripheral lower plate 230 and the inner peripheral lower plate 330 is completed, the insertion protrusions 233 and 333 provided on their upper surfaces are respectively inserted into the lower ends of the outer peripheral block 210 and the inner peripheral block 310. In this way, the outer peripheral block 210 and the inner peripheral block 310 are installed (FIG. 12).

As a result, the outer peripheral blocks 210 form an outer rim along the excavation slope 110 while having a structure in which the outer surfaces are in close contact with each other, and the inner peripheral blocks 310 form the space S between the outer rims. are spaced apart from each other to form.

As described above, only the operation of inserting the insertion protrusions 233 and 333 provided on the outer peripheral lower plate 230 and the inner peripheral lower plate 330 into the lower ends of the outer peripheral block 210 and the inner peripheral block 310 is their correct position. Since the installation is completed, the workability is greatly improved.

At this time, by making the outer circumferential block 210 have a slightly longer standard than the inner circumferential block 310, the slab end formed by the inner circumferential upper plates 320 in a future step is in close contact with the outer surface of the outer circumferential block 210 It is preferable to do so.

e) When the installation of the outer circumferential block 210 is completed, backfilling is performed with a backfill material 130 such as coarse aggregate between the excavation slope 110 and the outer circumferential block 210 . Along with this, by filling the lower portions of the space (S) between the outer peripheral block 210 and the inner peripheral block 310 and the space (S) between the respective inner peripheral blocks 310 with gravel 141, the outer peripheral block ( 210) and the lower portion of the inner peripheral block 310 are fixed, and the degree of filling is preferably less than 1/2 of the total height of the interspace S (FIG. 13).

Accordingly, the lower portions of the outer peripheral block 210 and the inner peripheral block 310 can have a solid fixing structure, and the upper portion of the space S between them can be used as a storage space.

f) When the backfilling of the outer edge of the outer rim and the filling of the gravel 141 for the interspace S are completed, the outer peripheral upper plate 220 and the inner peripheral upper plate 320 are combined with the outer peripheral block 210 and the inner peripheral block 310 ) is installed on each upper part (FIG. 14).

The outer peripheral upper plate 220 and the inner peripheral upper plate 320 are also installed in such a way that the insertion protrusions 223 and 323 formed on the bottom surface are inserted into the outer peripheral tube block 210 and the inner peripheral tube block 310 .

When the outer circumferential block 210 is installed with a slightly longer standard than the inner circumferential block 310, the slab end formed by the inner circumferential upper plates 320 is in close contact with the outer surface of the outer circumferential block 210 and supports it. The support of the back earth pressure by the outer circumferential block 210 is made to be stable.

g) When the installation of the outer circumferential top plate 220 and the inner circumferential top plate 320 is completed, at least of the outer circumferential top plate 220 and the inner circumferential top plate 320 except for the portion where the manhole cover 220a is installed. Install a flooring material (F) suitable for its intended use (FIG. 15).

For example, if the upper part of the rainwater storage tank is used as a parking lot, concrete or blocks are installed.

In addition, when the outer circumferential block 210 has a structure supported by the inner circumferential top plate 320 , the resulting step difference is finished flat using the floor material F such as concrete.

A tarpaulin 111 may be further installed on the upper surfaces of the outer circumferential top plate 220 and the inner circumferential top plate 320 if necessary.

In the above, the present invention has been described in detail with reference to specific embodiments, but the embodiments are merely examples for easy understanding of the present invention. It is obvious that it can be implemented with various modifications within. Accordingly, such modifications will be said to be within the scope of the present invention as described in the claims.

110; excavation slope 120; excavation bottom
111; tarpaulin 130; backfill
140; gravel layer 141,251; Pebble
210; outer perimeter block 220; outer perimeter plate
220a; manhole cover 223,233,323,333; insertion protrusion
230; outer peripheral plate 231,331,331a; opening
241; rainwater inlet pipe 242; storm drain pipe
243,343; through hole 250; filter layer
252; sand 253; collection bag
310; inner main block 320; inner perimeter plate
330; inner peripheral plate 332; hemisphere home
411; rain detector 412; pumping means
413; control means S; interspace
F; flooring

Claims (14)

An outer rim is formed by a plurality of outer perimeter blocks 210 in which an outer peripheral upper plate 220 is installed and an outer peripheral lower plate 230 is installed in the upper part, an inner peripheral upper plate 320 is installed in the upper part, and the inner peripheral upper plate 320 is installed in the lower part The inner peripheral block 310 on which the lower plate 330 is installed is located in the inner space formed by the outer perimeter, and at least one of the outer peripheral blocks 210 is provided with a rainwater inlet pipe 241, and the rainwater inlet pipe 241 is installed. A rainwater discharge pipe 242 is installed in any one of the outer peripheral block 210 in which the inlet pipe 241 is not installed, and at least the outer peripheral block 210 of the outer peripheral block 210 and the inner peripheral block 310 is formed in a rectangular cross section,
The outer peripheral upper plate 220 and the outer peripheral lower plate 230 have the same rectangular cross-section as the outer peripheral block 210, and the inner peripheral upper plate 320 and the inner peripheral lower plate 330 are the outer peripheral blocks of the inner peripheral block 310. It has a rectangular cross-section larger than the cross-section, and openings 231 and 331 are provided in each center of the outer peripheral lower plate 230 and the inner peripheral lower plate 330, and the edge of the inner peripheral lower plate 330 is adjacent to the inner peripheral lower plate 330. Free cross-section type rainwater storage tank, characterized in that provided with a hemispherical groove (332) for forming another opening (331a). According to claim 1,
Between the outer peripheral blocks 210 adjacent to each other, each outer surface is in close contact,
Free cross-section type rainwater storage tank, characterized in that the space (S) is formed between each outer surface is spaced apart between the inner peripheral block (310) adjacent to each other. 3. The method of claim 2,
The free cross-section type rainwater storage tank, characterized in that the lower portion of the space (S) is filled with gravel (141). According to claim 1,
The outer peripheral upper plate 220 of each outer peripheral pipe block 210 in which the rainwater inlet pipe 241 and the rainwater outlet pipe 242 are installed is a free cross-section type rainwater storage tank, characterized in that it is composed of an openable and openable manhole cover 220a. delete According to claim 1,
One side length of the inner peripheral upper and lower plates (320,330) is a free-section type rainwater storage tank, characterized in that it is formed as a multiple of the length of one side of the outer peripheral upper and lower plates (220,230). According to claim 1,
Each inner circumferential top plate 320 installed on the inner circumferential block 310 forms one slab having the same plane,
The end of the slab is a free cross-section type rainwater storage tank, characterized in that configured to support the outer surface of the outer peripheral block (210). According to claim 1,
Insertion protrusions 223,233,323,333 are formed on the bottom and upper surfaces of the outer peripheral upper and lower plates 220 and 230 and the inner peripheral upper and lower plates 320 and 330, and the inserting projections 223,233,323,333 are the outer peripheral block 210 and the inner peripheral block 310. By being inserted into the outer peripheral upper and lower plates (220,230) and the inner peripheral upper and lower plates (320,330) is a free cross-section type rainwater storage tank, characterized in that the fixed installation to the outer peripheral block 210 and the inner peripheral block (310). The method of claim 1 .
A free cross-section type rainwater storage tank, characterized in that a gravel layer 140 is formed on the lower portion of the outer peripheral lower plate 230 and the inner peripheral lower plate 330, and a tarpaulin 111 is installed on the lower portion of the gravel layer 140. According to claim 1,
The free cross-section type rainwater storage tank, characterized in that the outer peripheral block (210) and the inner peripheral block (310) communicate with each other through holes (243, 343) are formed. According to claim 1,
A filter layer 250 is installed on the outer peripheral block 210 in which the rainwater inlet pipe 241 is installed,
A free cross-section type rainwater storage tank, characterized in that a collection bag 253 equipped with a mesh through which rainwater can pass is installed on the upper portion of the filter layer 250 . According to claim 1,
A pumping means 412 operated by a control means 413 is installed inside the outer peripheral block 210 in which the rainwater discharge pipe 242 is installed, and a raindrop detector 411 is installed outside the storage tank installation space, When the raindrop detector 411 confirms the non-stop condition, the control means 413 receiving it commands the pumping means 412 to operate when the non-stop duration time is longer than the set time, and the rainwater rainwater discharge pipe 242 ) free cross-section type rainwater storage tank, characterized in that it is configured to be discharged to the outside through. As a method of constructing a rainwater storage tank according to any one of claims 1 to 4 and 6 to 12,
a) installing a tarpaulin 111 on the excavation bottom surface 120 after excavation;
b) forming a gravel layer 140 on the upper surface of the tarpaulin 111 installed on the excavation bottom surface 120;
c) disposing an outer peripheral lower plate 230 and an inner peripheral lower plate 330 on the upper surface of the gravel layer 140,
The outer peripheral lower plate 230 is disposed on the outer rim adjacent to the excavation slope 110 formed by the excavation in step a), and the inner peripheral lower plate 330 is disposed on the inside of the rim, the outer peripheral lower plate 230 and the inner peripheral lower plate forming one flat plane with 330;
d) Insert the insertion protrusions 233 and 333 provided on the upper surfaces of the outer peripheral lower plate 230 and the inner peripheral lower plate 330 into the lower ends of the outer peripheral block 210 and the inner peripheral block 310, and the outer peripheral block 210 and Complete the installation of the inner main block 310, but
The outer peripheral blocks 210 adjacent to each other make their outer surfaces to be in close contact with each other, and the inner peripheral blocks 310 adjacent to each other are spaced apart to form a space S between the outer peripheral blocks 210 and the inner peripheral blocks 310 are installed. to do;
e) backfilling between the excavation slope 110 and the outer circumferential block 210, the space S between the outer circumferential block 210 and the inner circumferential block 310, and the inner circumferential block 310 Filling each lower part of the interspace (S) with gravel 141 to fix the lower portions of the outer peripheral block 210 and the inner peripheral block 310;
f) the outer peripheral upper plate 220 and the inner peripheral upper plate 220 and the inner peripheral plate by inserting the insertion protrusions 223 and 323 respectively formed on the bottom surface of the outer peripheral upper plate 220 and the inner peripheral upper plate 320 on each upper part of the outer peripheral pipe block 210 and the inner peripheral pipe block 310 Completing the installation of the upper plate 320;
g) the step of installing the flooring material (F) on at least the upper part of the inner columnar plate 320 of the outer columnar top plate 220 and the inner columnar upper plate 320 except for the portion where the manhole cover 220a is installed; characterized in that it is made in sequence Construction method of rainwater storage tank. 14. The method of claim 13,
In step d), the outer circumferential block 210 is a construction method of a rainwater storage tank, characterized in that a longer length than the inner circumferential block 310 is installed.

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