Construction method and structure of a paving surface buried storage tank

Abstract

The present invention relates to a construction method and structure of a pavement-embedded retention tank that can significantly improve rainwater drainage efficiency so that rainwater on the pavement surface can diffuse and drain into the ground at a faster rate, comprising: a) an excavation step of excavating the ground; b) a manhole installation step in which a manhole is installed in a seated state on the bottom surface of the excavation space formed by excavating the ground; c) a lower permeable sheet placement step in which a lower permeable sheet is placed in a seated state on the bottom surface of the excavation space while maintaining a certain distance from the manhole; d) a retention tank block assembly step in which retention tank blocks are assembled and stacked on top of the lower permeable sheet; and e) a finishing permeable sheet installation step in which the side and top surfaces of the retention tank blocks are finished with a finishing permeable sheet. f) a step of installing a water diffusion drainage member on the side of the water tank block so as to be in communication with the water tank block, for diffusing and draining rainwater stored in the water tank block outwardly; g) a backfilling step of backfilling an excavated space formed in the ground; and h) a paving surface formation step of forming a paving surface in the ground; characterized by comprising

Description

Technology Field

[0001] The present invention relates to a construction method and structure of a pavement-embedded retention tank that can significantly improve rainwater drainage efficiency so that rainwater on the pavement surface can diffuse and drain into the ground at a faster rate. Background Technology

[0003] Generally, as urbanization progresses and drainage facilities develop, rainwater flows into rivers at a rapid rate during rainfall, not only causing frequent river flooding but also leading to groundwater depletion due to insufficient rainwater seeping into the ground.

[0004] To prevent this phenomenon, efforts are being made to secure a storage space capable of storing a significant amount of rainwater underground to trap rainwater during rainfall, thereby controlling the speed and volume of inflow into rivers to reduce river flooding, and to prevent groundwater depletion by infiltrating the stored rainwater into the ground. As part of this effort, a prefabricated infiltration storage tank capable of not only enabling rainwater storage and ground infiltration but also filtering pollutants entering the rainwater infiltration storage tank and adjusting the size of the storage space has been proposed in Korean Patent Publication No. 10-1847553.

[0005] However, there is a problem in that the drainage efficiency of rainwater drained from the reservoir into the ground is reduced due to blockage caused by foreign substances, such as sediment, flowing into the reservoir as proposed in the aforementioned domestic registered patent publication No. 10-1847553, etc., which reduces the amount of rainwater seeping into the ground and causes flood damage such as groundwater depletion and river flooding. Prior art literature

[0007] Korean Patent Publication No. 10-1847553 The problem to be solved

[0008] The present invention was created to solve the aforementioned problems, and aims to provide a construction method and structure for a pavement-embedded retention tank that can significantly improve rainwater drainage efficiency so that rainwater on the pavement surface can diffuse and drain into the ground at a faster rate. means of solving the problem

[0010] The present invention for achieving the above objectives comprises: a) an excavation step of excavating the ground; b) a manhole installation step in which a manhole is installed in a seated state on the bottom surface of the excavation space formed by excavating the ground; c) a lower permeable sheet placement step in which a lower permeable sheet is placed in a seated state on the bottom surface of the excavation space while maintaining a certain distance from the manhole; d) a reservoir block assembly step in which a reservoir block is assembled and provided in a stacked state on top of the lower permeable sheet; e) a finishing permeable sheet installation step in which the side and top surfaces of the reservoir block are finished with a finishing permeable sheet; f) a reservoir diffusion drainage member installation step in which a reservoir diffusion drainage member is installed on the side of the reservoir block so as to communicate with the reservoir block to diffuse and drain rainwater stored in the reservoir block toward the outside of the reservoir block; and g) a backfilling step of backfilling the excavation space formed in the ground; h) a pavement surface forming step of forming a pavement surface on the ground; the present invention provides a method for constructing a pavement-surface-embedded retention tank characterized by including the above steps.

[0012] Here, the above step d) preferably comprises a reservoir block stacking step in which a reservoir block is stacked on top of the lower permeable sheet; and a guide pipe installation step in which a guide pipe communicating with the reservoir block and the manhole is installed between the reservoir block and the manhole, which are assembled in a stacked state on top of the lower permeable sheet.

[0014] In addition, in step d), the edge portion of the lower permeable sheet is exposed in a state of horizontal extension for a certain length in the side outer direction of the reservoir block, and in step e), the finishing permeable sheet is seated on the upper surface of the reservoir block and the edge portion is exposed in a state of horizontal extension for a certain length in the side outer direction of the reservoir block; a first finishing step in which the edge portion of the lower permeable sheet wraps around the side portion of the reservoir block and is finished first; and a second finishing step in which the edge portion of the finishing permeable sheet wraps around the side portion of the reservoir block and the edge portion of the lower permeable sheet and is finished second.

[0016] Furthermore, in step f) above, the water diffusion drainage member is preferably composed of a horizontal plate that extends horizontally for a certain length in the side outer direction of the water tank block, and vertical plates that protrude for a certain length from the upper and lower parts of the horizontal plate respectively and are arranged at regular intervals on the horizontal plate while extending for a certain length along the horizontal plate, and a drainage diffusion frame in which a drainage channel is formed between the vertical plates to diffuse and drain rainwater stored in the water tank block to the outer direction of the water tank block; and a permeable sheet covering the drainage diffusion frame.

[0018] In particular, the above step f) comprises: a permeable sheet cutting step of horizontally cutting the other side portion of the front side and the other side portion of the rear side of the permeable sheet It is preferable that the permeable sheet joining step comprises joining the other portion of the permeable sheet, which is spread out in the upper and lower directions of the above-mentioned storage diffusion drainage member, to the edge portion of the lower permeable sheet, which is in a state of primary finishing of the side portion of the above-mentioned storage tank block.

[0020] In addition, the above step f) preferably further comprises: an auxiliary permeable sheet preparation step of preparing an auxiliary permeable sheet in which a horizontal cut line is formed in the center; an auxiliary permeable sheet placement step in which the auxiliary permeable sheet is placed on the reservoir diffusion drainage member such that the other side of the permeable sheet, which is spread out in the upper and lower directions of the reservoir diffusion drainage member, is positioned between the auxiliary permeable sheet and the edge portion of the lower permeable sheet, which is in a state of primary finishing of the side of the reservoir block; and an auxiliary permeable sheet joining step in which the auxiliary permeable sheet is joined to the edge portion of the lower permeable sheet, which is in a state of primary finishing of the side of the reservoir block, while the auxiliary permeable sheet covers the other side of the permeable sheet, which is spread out in the upper and lower directions of the reservoir diffusion drainage member.

[0022] Here, in step f), the auxiliary permeability sheet is composed of a front auxiliary permeability sheet having a horizontal cut line formed at the rear center and a rear auxiliary permeability sheet having a horizontal cut line formed at the front center that communicates with the horizontal cut line of the front auxiliary permeability sheet, and it is preferable that the rear portion of the front auxiliary permeability sheet and the front portion of the rear auxiliary permeability sheet overlap such that the horizontal cut line of the front auxiliary permeability sheet and the horizontal cut line of the rear auxiliary permeability sheet are located on the same horizontal line.

[0024] In addition, the present invention provides a structure of a paved surface-embedded reservoir characterized by comprising: a manhole; a lower permeable sheet maintaining a certain distance from the manhole; a reservoir block assembled and stacked on top of the lower permeable sheet; a finishing permeable sheet finishing the side and top surfaces of the reservoir block; and a reservoir diffusion drainage member installed on the side of the reservoir block to communicate with the reservoir block and for diffusion draining rainwater stored in the reservoir block toward the outside of the reservoir block. Effects of the invention

[0026] The present invention enables rainwater stored in a reservoir block to be diffused and drained into the ground outside the reservoir block at a faster speed through a reservoir diffusion drainage member installed on the side of the reservoir block so as to be in communication with the reservoir block, thereby significantly improving the efficiency of rainwater drainage into the ground and, as a result, having the effect of preventing water damage such as groundwater depletion and river flooding. Brief explanation of the drawing

[0028] FIG. 1 is a block diagram schematically illustrating a construction method of a paved surface-embedded retention tank, which is an embodiment of the present invention. Figure 2 is a cross-sectional view schematically showing an excavation space formed by excavating the ground. Figure 3 is a cross-sectional view schematically showing a manhole installed on the bottom surface of an excavation space. Figure 4 is a cross-sectional view schematically showing the state in which a lower permeable sheet is seated on the bottom surface of an excavation space. Figure 5 is a cross-sectional view schematically showing a state in which a reservoir block is stacked on top of a lower permeable sheet. Figure 6 is a cross-sectional view schematically showing the state in which a guide pipe is installed between the manhole and the reservoir block. Figures 7 and 8 are cross-sectional views schematically illustrating the process of finishing the side and top surfaces of a reservoir block with a permeable sheet. FIG. 9 is a cross-sectional view schematically showing the state in which a storage diffusion drainage member is installed on the side of a storage tank block. Figure 10 is a plan view of Figure 9. FIG. 11 is a perspective view schematically showing an example of a storage diffusion drainage member. FIG. 12 is a perspective view schematically showing the other side of the permeable sheet of an example of a water retention diffusion drainage member in an unfolded state. FIG. 13 is a partially enlarged cross-sectional view showing an example of a storage diffusion drainage member installed on the side of a storage tank block. FIG. 14 is a schematic separation view showing the state in which an auxiliary permeable sheet is separated from an example of a storage diffusion drainage member. Fig. 15 is a combined perspective view of Fig. 14. FIG. 16 is a partially enlarged cross-sectional view schematically showing a state in which an example of a storage diffusion drainage member and an example of an auxiliary permeable sheet are installed on the side of a storage tank block. FIG. 17 is a perspective view schematically showing an auxiliary pitcher sheet of another example. FIG. 18 is a cross-sectional view schematically showing the backfilled state of the excavated space formed in the ground. FIG. 19 is a cross-sectional view schematically showing the state in which a paved surface is formed on the ground. Specific details for implementing the invention

[0029] Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the attached drawings. Of course, the scope of the present invention is not limited to the following embodiments, and various modifications can be made by those skilled in the art within the scope of the technical essence of the present invention.

[0031] FIG. 1 is a block diagram schematically illustrating a construction method of a paved surface-embedded retention tank, which is an embodiment of the present invention.

[0033] A construction method for a paved surface-embedded retention tank, which is an embodiment of the present invention, is largely comprised of the following steps as shown in FIG. 1: a) excavation step (hereinafter referred to as 'step a'), b) manhole installation step (hereinafter referred to as 'step b'), c) lower permeable sheet placement step (hereinafter referred to as 'step c'), d) retention tank block assembly step (hereinafter referred to as 'step d'), e) finishing permeable sheet installation step (hereinafter referred to as 'step e'), f) retention diffusion drainage member installation step (hereinafter referred to as 'step f'), g) backfilling step (hereinafter referred to as 'step g'), and h) paved surface formation step (hereinafter referred to as 'step h').

[0035] Figure 2 is a cross-sectional view schematically showing an excavation space formed by excavating the ground.

[0037] First, step a) above is a step of excavating the ground (3) to a certain depth using heavy equipment such as an excavator, as shown in FIG. 2.

[0039] Figure 3 is a cross-sectional view schematically showing a manhole installed on the bottom surface of an excavation space.

[0041] Next, step b) is a step in which a manhole (9) is installed in a positioned state on the bottom surface of the excavation space (S) formed by excavating the ground (3).

[0042] The above manhole (9) may be installed on one side of the bottom surface of the excavation space (S) or on the other side of the bottom surface, or as shown in FIG. 3, it may be installed on both one side of the bottom surface and the other side of the bottom surface of the excavation space (S).

[0044] Figure 4 is a cross-sectional view schematically showing the state in which a lower permeable sheet is seated on the bottom surface of an excavation space.

[0046] Next, step c) is a step in which a lower permeable sheet (10) is placed horizontally on the bottom surface of the excavation space (S) while maintaining a certain distance from the manhole (9).

[0047] The manhole (9) may be placed in one direction or the other direction of the lower permeable sheet (10), or as shown in FIG. 4, the manhole (9) may be placed in both one direction and the other direction of the lower permeable sheet (10).

[0048] The lower permeable sheet (10) above is intended to prevent foreign substances such as soil from entering the interior of the reservoir block to be described later, while allowing rainwater stored in the reservoir block to be drained into the ground (2) in the lower direction of the reservoir block.

[0049] The lower permeable sheet (10) above can be made of various types, such as non-woven fabric.

[0051] Figure 5 is a cross-sectional view schematically showing a state in which a reservoir block is stacked on top of a lower permeable sheet.

[0053] Next, step d) is a step in which a reservoir block (20) is assembled and stacked vertically and horizontally on top of the lower permeable sheet (10) as shown in FIG. 5.

[0054] In step d) above, the edge portions of the lower permeable sheet (10), namely the one-sided edge portion, the other-sided edge portion, the front-sided edge portion, and the rear-sided edge portion, can be exposed in a state of being horizontally extended for a certain length in the side outer direction of the reservoir block (20), namely the one-sided outer direction, the other-sided outer direction, the front-sided outer direction, and the rear-sided outer direction.

[0055] Hereinafter, the term "edge" may include all of the first edge, the other edge, the front edge, and the rear edge, and the "side" may also include all of the first side, the other side, the front side, and the rear side.

[0056] In order to allow rainwater to move more easily into the interior of the reservoir block (20) through the manhole (9), the above step d) may be performed, for example, mainly by d1) a reservoir block stacking step (hereinafter referred to as 'step d1') and d2) a guide pipe installation step (hereinafter referred to as 'step d2').

[0057] The above step d1) is a step in which a reservoir block (20) is stacked vertically and horizontally on top of the lower permeable sheet (10) as shown in FIG. 5.

[0059] Figure 6 is a cross-sectional view schematically showing the state in which a guide pipe is installed between the manhole and the reservoir block.

[0061] Step d2) above is a step of horizontally installing a guide pipe (21) that communicates with the reservoir block (20) and the manhole (9) between the reservoir block (20) and the manhole (9), which are assembled in a stacked state on top of the lower permeable sheet (10) as shown in FIG. 6.

[0062] Rainwater flowing into the interior of the manhole (9) can be smoothly moved into the interior of the reservoir block (20) through the guide pipe (21).

[0063] Although not shown in the drawing, the guide tube (21) may be equipped with a filter member to remove foreign substances, such as soil, contained in rainwater that moves into the interior of the reservoir block (20) through the guide tube (21).

[0065] Figures 7 and 8 are cross-sectional views schematically illustrating the process of finishing the side and top surfaces of a reservoir block with a permeable sheet.

[0067] Next, step e) is a step of finishing the side and top surfaces of the reservoir block (20) with a finishing permeable sheet (30) as seen in FIGS. 7 and 8.

[0068] The above-mentioned permeable sheet (30) is intended to prevent foreign substances such as soil from entering the interior of the reservoir block (20) together with the lower permeable sheet (10), and to allow rainwater stored in the reservoir block (20) to be drained outward from one side, the other side, the front side, and the rear side of the reservoir block (20).

[0069] The above-mentioned permeable sheet (30) can be made of various types, such as non-woven fabric.

[0070] In order to make it easier to finish the side and top surfaces of the reservoir block (20) using the above-mentioned permeable sheet (30), the above-mentioned step e) may be composed, for example, mainly of e1) a finishing permeable sheet placement step (hereinafter referred to as 'step e1'), e2) a first finishing step (hereinafter referred to as 'step e2'), and e3) a second finishing step (hereinafter referred to as 'step e3').

[0071] The above step e1) is a step in which the middle portion of the finishing permeable sheet (30) is placed on the uppermost surface of the reservoir block as shown in FIG. 8.

[0072] The edge portion of the above-mentioned finishing permeable sheet (30) may be exposed in a state of being horizontally extended for a certain length in the side outer direction of the above-mentioned reservoir block (20).

[0073] The above step e2) is a step of first finishing in which the edge portions of the lower permeable sheet (10) are each folded vertically toward the side direction of the reservoir block (20) as shown in FIG. 8, thereby wrapping the side portions of the reservoir block (20).

[0074] The above step e3) is a step of secondary finishing in which the edge portion of the finishing permeable sheet (30), as seen in FIG. 8, wraps around the edge portion of the lower permeable sheet (10) that is folded vertically with the side portion of the reservoir block (20), and is fixed in various ways such as adhesive tape fixing, staple fixing, and adhesive fixing.

[0075] The edge portion of the lower permeable sheet (10) facing the guide tube (21) and the edge portion of the finishing permeable sheet (30) can each be cut into a shape corresponding to the shape of the lower outer surface and the shape of the upper outer surface of the guide tube (21).

[0077] FIG. 9 is a cross-sectional view schematically showing a state in which a storage diffusion drainage member is installed on the side of a storage tank block, and FIG. 10 is a plan view of FIG. 9.

[0079] Next, step f) is a step of horizontally installing a plurality of storage diffusion drainage members (40) that communicate with the storage block (20) at regular intervals on the lower side of the lowest storage block (20) among the storage blocks (20), as seen in FIGS. 9 and 10.

[0080] The storage diffusion drainage member (40) located on one side and the other side of the storage tank block (20) can be installed in a state where it is extended left and right for a certain length from one side to the other side of the storage tank block (20).

[0081] The storage diffusion drainage member (40) located on the front side and the other side of the storage tank block (20) can be installed in a state where it is extended to a certain length in the front-rear direction of the storage tank block (20).

[0082] The above-mentioned storage diffusion drainage member (40) is intended to diffuse and drain rainwater stored in the storage tank block (20) into the ground (2) in the direction of one side outside, the direction of the other side outside, the direction of the front side outside, and the direction of the rear side outside, respectively (refer to the dotted arrows in FIG. 9 and FIG. 10).

[0083] Due to the above-mentioned storage diffusion drainage member (40), rainwater stored in the storage tank block (20) can be diffused and drained into the ground (2) in the outer direction of the surrounding area of ​​the storage tank block (20) at a faster speed, thereby greatly improving the efficiency of rainwater drainage into the ground (2), and thereby preventing water damage such as groundwater depletion and river flooding.

[0085] FIG. 11 is a schematic perspective view showing an example of a water retention diffusion drainage member, and FIG. 12 is a schematic perspective view showing the other side of the permeable sheet of the example water retention diffusion drainage member in an unfolded state.

[0087] In order to further improve the rainwater drainage efficiency through the above-mentioned water storage diffusion drainage member (40), the above-mentioned water storage diffusion drainage member (40) may be configured to include, for example, a drainage diffusion frame (410) and a permeable sheet (420), as shown in FIGS. 11 and FIGS. 12.

[0088] The above drainage diffusion frame (410) can be largely composed of a horizontal plate (411) and a vertical plate (412).

[0089] The above horizontal plate (411) can be formed to extend horizontally for a certain length in the side outer direction of the reservoir block (20) while communicating with the reservoir block (20).

[0090] The vertical plate (412) can be vertically arranged at regular intervals in the front-rear direction of the horizontal plate (411) while extending along the horizontal plate (411) by a certain length, protruding from the upper and lower parts of the horizontal plate (411) respectively.

[0091] A drainage channel (413) may be formed between the vertical plates (412) to diffuse and drain rainwater stored in the reservoir block (20) into the ground (2) in the direction outside the reservoir block (20).

[0092] The above permeable sheet (420) is intended to prevent foreign substances such as soil from entering the inner side of the drainage diffusion frame (410), while allowing rainwater flowing into the drainage channel (413) of the drainage diffusion frame (410) to be diffused and drained into the underground (2) in the outer direction of the surrounding reservoir block (20).

[0093] The above permeable sheet (420) can cover the above drainage diffusion frame (410) while wrapping around it.

[0094] The above permeable sheet (420) can be made of various types, such as non-woven fabric.

[0095] One end of the above-mentioned permeable sheet (420) can be closed by various methods such as fusion bonding or sewing bonding.

[0096] In order to facilitate smooth rainwater drainage in one direction of the drainage diffusion frame (410), the left-right length from one side of the permeable sheet (420) to the other side can be formed larger than the left-right length from one side of the drainage diffusion frame (410) so that a drainage space (DS) can be formed between one side of the permeable sheet (420) and the drainage diffusion frame (410).

[0097] The other side of the above-mentioned reservoir diffusion drainage frame (40) can be inserted into the interior of the reservoir block (20) by horizontally penetrating a through hole formed in the side portion of the lowest reservoir block (20) among the reservoir blocks (20).

[0098] In order to highly efficiently block foreign substances such as soil from flowing into the interior of the reservoir block (20) through a penetration hole formed in the side portion of the reservoir block (20), the above step f) may be performed, for example, mainly by f1) a permeable sheet cutting step (hereinafter referred to as 'step f1'), f2) a permeable sheet spreading step (hereinafter referred to as 'step f2'), f3) a drainage diffusion frame installation step (hereinafter referred to as 'step f3'), and f4) a permeable sheet joining step (hereinafter referred to as 'step f4').

[0099] The above step f1) is a step of horizontally cutting (C) the front side and rear side portions of the permeable sheet (420) of the water storage diffusion drainage member (40) to a certain length each using various types of cutting means such as a cutter knife, as shown in FIG. 11.

[0100] Step f2) above is a step of spreading the other side portions of the permeable sheet (420) of the water storage diffusion drainage member (40), located in the upper and lower directions of the horizontal cut (C) portion of the permeable sheet (420) of the water storage diffusion drainage member (40) as seen in FIG. 12, respectively in the upper and lower directions of the permeable sheet (420) of the water storage diffusion drainage member (40).

[0102] FIG. 13 is a partially enlarged cross-sectional view showing an example of a storage diffusion drainage member installed on the side of a storage tank block.

[0104] The above step f3) is a step in which, as the other side portion of the permeable sheet (420) of the reservoir diffusion drainage member (40) is unfolded, the other side portion of the drainage diffusion frame (410) exposed from the permeable sheet (420) sequentially horizontally penetrates the edge portion of the lower permeable sheet (10), which is in a state of first finishing the side portion of the reservoir block (20) as seen in FIG. 13, and the lower side portion of the lowest reservoir block (20), and is drawn into the interior of the reservoir block (20) for a certain length.

[0105] The above step f4) is a step in which the other side portion of the permeable sheet (420), which is spread out in the upper and lower directions of the storage diffusion drainage member (40), is joined to the edge portion of the lower permeable sheet (10), which is in a vertically folded state to first finish the side portion of the storage tank block (20) as seen in FIG. 13, in various ways such as adhesive tape fixing, staple fixing, and adhesive fixing.

[0107] FIG. 14 is a separated perspective view schematically showing the state in which an auxiliary permeable sheet is separated from an example of a storage diffusion drainage member, and FIG. 15 is a combined perspective view of FIG. 14.

[0109] In order to more efficiently block foreign substances such as soil from flowing into the interior of the reservoir block (20) through a penetration hole formed on the side portion of the reservoir block (20) through which the other side of the reservoir diffusion drainage frame (40) can penetrate, the above step f) may further include f5) an auxiliary permeable sheet preparation step (hereinafter referred to as 'step f5'), f6) an auxiliary permeable sheet placement step (hereinafter referred to as 'step f6'), and f7) an auxiliary permeable sheet joining step (hereinafter referred to as 'step f7').

[0110] The above step f5) is a step of preparing an auxiliary permeable sheet (50) that can be made of various types, such as non-woven fabric.

[0111] As shown in FIG. 14, a horizontal cut line (511) can be formed in the center of the auxiliary permeable sheet (50) and extends horizontally from the front side to the rear side of the auxiliary permeable sheet (50) for a certain length using various types of cutting means, such as a cutter knife.

[0113] FIG. 16 is a partially enlarged cross-sectional view schematically showing a state in which an example of a storage diffusion drainage member and an example of an auxiliary permeable sheet are installed on the side of a storage tank block.

[0115] The above step f6) is a step in which the auxiliary permeable sheet (50) is placed on the storage diffusion drainage member (40) as seen in FIGS. 15 and 16.

[0116] The above-mentioned water retention diffusion drainage member (40) can horizontally penetrate the middle portion of the auxiliary permeable sheet (50) through the horizontal cut line (511) of the auxiliary permeable sheet (50).

[0117] The other side portion of the permeable sheet (420), which is spread out in the upper and lower directions of the above-mentioned storage diffusion drainage member (40), may be located between the edge portion of the lower permeable sheet (10), which is in a vertically folded state to first finish the side of the auxiliary permeable sheet (50) and the storage tank block (20), as seen in FIG. 16.

[0118] Step f7) above is a step in which the auxiliary permeable sheet (50), as seen in FIG. 16, covers the other side of the permeable sheet (420) that is spread out in the upper and lower directions of the reservoir diffusion drainage member (40), and is joined to the edge portion of the lower permeable sheet (10), which is folded vertically to finish the side of the reservoir block (20) in various ways such as adhesive tape fixing, staple fixing, and adhesive fixing.

[0120] FIG. 17 is a perspective view schematically showing an auxiliary pitcher sheet of another example.

[0122] The above auxiliary permeable sheet (50) may be composed of one auxiliary permeable sheet (50) as shown in FIGS. 14 and 15, but as another example, in order to allow the auxiliary permeable sheet (50) to be more easily placed on the water storage diffusion drainage member (40) in a state where it is easily fitted and coupled in the front and rear directions of the water storage diffusion drainage member (40), the auxiliary permeable sheet (50) may be composed of two auxiliary permeable sheets (50) as shown in FIG. 17.

[0123] To this end, the two auxiliary pitching sheets (50) of another example may largely consist of a front auxiliary pitching sheet (510) and a rear auxiliary pitching sheet (520).

[0124] A horizontal cut line (511) that extends horizontally for a certain length in the front-rear direction of the front auxiliary permeable sheet (510) may be formed at the rear center of the front auxiliary permeable sheet (510).

[0125] A horizontal cut line (511) that extends horizontally for a certain length in the front-rear direction of the rear auxiliary permeable sheet (520) may be formed at the front center of the rear auxiliary permeable sheet (520).

[0126] The rear portion of the front auxiliary permeable sheet (510) and the front portion of the rear auxiliary permeable sheet (520) can be overlapped so that the horizontal cut line (511) of the front auxiliary permeable sheet (510) and the horizontal cut line (511) of the rear auxiliary permeable sheet (520) are located on the same horizontal line.

[0128] FIG. 18 is a cross-sectional view schematically showing the backfilled state of the excavated space formed in the ground.

[0130] Next, step g) is a step of backfilling the excavation space (S) formed to a certain depth in the ground (3) as shown in FIG. 18.

[0132] FIG. 19 is a cross-sectional view schematically showing the state in which a paved surface is formed on the ground.

[0134] Next, step h) is a step of forming a pavement surface (60) of a certain thickness on the ground (3) as shown in FIG. 19.

[0135] The above pavement surface (60) can be made of various types, such as bricks, concrete, asphalt, etc.

[0136] A grating (7) made of various materials, such as steel, can be horizontally installed on the upper part of the above manhole (9).

[0137] Next, the structure of a paved surface-embedded reservoir, which is an embodiment of the present invention, comprises the manhole (9), the lower permeable sheet (10), the reservoir block (20), the guide pipe (21), the finishing permeable sheet (30), the reservoir diffusion drainage member (40), the auxiliary permeable sheet (50), and the paved surface (60). As described above, a repetitive explanation will be omitted below. Explanation of the symbols

[0139] 3; ground, 31; excavation space, 10; lower permeable sheet, 20; retention tank block, 30; finishing permeable sheet, 40; water retention diffusion drainage member.

Claims

Claim 1 a) an excavation step for excavating the ground; b) a manhole installation step in which a manhole is installed in a manner in which it is seated on the bottom surface of the excavation space formed by excavating the ground; c) a lower permeable sheet placement step in which a lower permeable sheet is placed in a manner in which it is seated on the bottom surface of the excavation space while maintaining a certain distance from the manhole; d) a reservoir block assembly step in which a reservoir block is assembled and provided in a stacked manner on top of the lower permeable sheet; e) a finishing permeable sheet installation step in which the side and top surfaces of the reservoir block are finished with a finishing permeable sheet; f) a reservoir diffusion drainage member installation step in which a reservoir diffusion drainage member is installed on the side of the reservoir block so as to communicate with the reservoir block to diffuse and drain rainwater stored in the reservoir block toward the outside of the reservoir block; g) a backfilling step for backfilling the excavation space formed in the ground; and h) a paving surface formation step for forming a paving surface on the ground; comprising A method for constructing a paved surface embedded retention tank, wherein in step f) the retention diffusion drainage member comprises a horizontal plate that extends horizontally for a certain length in the side outer direction of the retention tank block, and vertical plates that protrude for a certain length at the upper and lower ends of the horizontal plate and are arranged at regular intervals on the horizontal plate while extending for a certain length along the horizontal plate, and a drainage diffusion frame formed between the vertical plates to diffuse and drain rainwater retained in the retention tank block in the outer direction of the retention tank block; and a permeable sheet covering the drainage diffusion frame. Claim 2 A method for constructing a paved surface-embedded retention tank, wherein, in claim 1, step d) comprises: a retention tank block stacking step in which a retention tank block is stacked on top of the lower permeable sheet; and a guide pipe installation step in which a guide pipe communicating with the retention tank block and the manhole is installed between the retention tank block, which is assembled in a stacked state on top of the lower permeable sheet, and the manhole. Claim 3 A method for constructing a paved surface-embedded retention tank according to claim 1, wherein in step d), the edge portion of the lower permeable sheet is exposed in a state of horizontal extension for a certain length in the side-outer direction of the retention tank block, and in step e), a finishing permeable sheet seating step in which the edge portion is seated on the upper surface of the retention tank block and exposed in a state of horizontal extension for a certain length in the side-outer direction of the retention tank block; a first finishing step in which the edge portion of the lower permeable sheet is wrapped around the side portion of the retention tank block and the second finishing step in which the edge portion of the finishing permeable sheet is wrapped around the side portion of the retention tank block and the edge portion of the lower permeable sheet; characterized by comprising: a first finishing step in which the edge portion of the finishing permeable sheet is wrapped around the side portion of the retention tank block and the edge portion of the lower permeable sheet. Claim 4 In claim 1, the above step f) comprises: a permeable sheet cutting step of horizontally cutting the other side portion of the front side and the other side portion of the rear side of the permeable sheet of the water storage diffusion drainage member by a certain length, respectively; a permeable sheet spreading step of spreading the other side portion of the permeable sheet of the water storage diffusion drainage member located in the upper and lower directions of the cut portion of the permeable sheet of the water storage diffusion drainage member in the upper and lower directions of the permeable sheet of the water storage diffusion drainage member, respectively; a drainage diffusion frame installation step in which, as the other side portion of the permeable sheet of the water storage diffusion drainage member is spread, the other side portion of the drainage diffusion frame exposed from the permeable sheet sequentially penetrates the edge portion of the lower permeable sheet, which is in a state of primary finishing of the side portion of the water storage block, and the lower side portion of the water storage block, and is introduced into the interior of the water storage block by a certain length; and the A construction method for a paved surface-embedded retention tank, characterized by comprising: a permeable sheet joining step in which the other portion of the permeable sheet, which is spread out in the upper and lower directions of the retention diffusion drainage member, is joined to the edge portion of the lower permeable sheet, which is in a state of primary finishing of the side portion of the retention tank block. Claim 5 In claim 4, the above step f) further comprises: an auxiliary permeable sheet preparation step of preparing an auxiliary permeable sheet in which a horizontal cut line is formed in the center; an auxiliary permeable sheet placement step in which the auxiliary permeable sheet is placed on the reservoir diffusion drainage member such that the other side of the permeable sheet, which is spread out in the upper and lower directions of the reservoir diffusion drainage member, is positioned between the auxiliary permeable sheet and the edge portion of the lower permeable sheet, which is in a state of primary finishing of the side of the reservoir block; an auxiliary permeable sheet joining step in which the auxiliary permeable sheet is joined to the edge portion of the lower permeable sheet, which is in a state of primary finishing of the side of the reservoir block, such that the other side portion of the permeable sheet is positioned between the auxiliary permeable sheet and the edge portion of the reservoir diffusion drainage member, which is respectively spread out in the upper and lower directions of the reservoir diffusion drainage member; and an auxiliary permeable sheet joining step in which the auxiliary permeable sheet is joined to the edge portion of the lower permeable sheet, which is in a state of primary finishing of the side of the reservoir block, while the auxiliary permeable sheet covers the other side portion of the permeable sheet, which is respectively spread out in the upper and lower directions of the reservoir diffusion drainage member. Claim 6 A method for constructing a paved surface-embedded retention tank, wherein in step f) above, the auxiliary permeable sheet is composed of a front auxiliary permeable sheet having a horizontal cut line formed in the rear center and a rear auxiliary permeable sheet having a horizontal cut line formed in the front center that communicates with the horizontal cut line of the front auxiliary permeable sheet, and the rear portion of the front auxiliary permeable sheet and the front portion of the rear auxiliary permeable sheet overlap so that the horizontal cut line of the front auxiliary permeable sheet and the horizontal cut line of the rear auxiliary permeable sheet are located on the same horizontal line. Claim 7 The apparatus comprises: a manhole; a lower permeable sheet maintaining a certain distance from the manhole; a reservoir block assembled and stacked on top of the lower permeable sheet; a finishing permeable sheet finishing the side and top surfaces of the reservoir block; and a reservoir diffusion drainage member installed on the side of the reservoir block to communicate with the reservoir block and for diffusion draining rainwater stored in the reservoir block to the outside of the reservoir block; wherein the reservoir diffusion drainage member is composed of a horizontal plate extending horizontally for a certain length in the side and outside of the reservoir block, and vertical plates protruding for a certain length from the upper and lower parts of the horizontal plate, respectively, and vertically arranged at a certain interval on the horizontal plate while extending for a certain length along the horizontal plate, and a drainage diffusion frame having a drainage channel formed between the vertical plates for diffusion draining rainwater stored in the reservoir block to the outside of the reservoir block; and a permeable sheet covering the drainage diffusion frame. Structure of a buried retention tank on a paved surface. Claim 8 The structure of a paved surface-embedded reservoir according to claim 7, characterized by comprising a guide pipe installed to communicate with the reservoir block and the manhole between the reservoir block and the manhole, which are assembled in a stacked state on top of the lower permeable sheet. Claim 9 The structure of a paved surface-embedded reservoir according to claim 7, wherein the edge portion of the lower permeable sheet is exposed in a state of horizontal extension for a certain length in the side-outer direction of the reservoir block, and the edge portion of the finishing permeable sheet is exposed in a state of horizontal extension for a certain length in the side-outer direction of the reservoir block while the finishing permeable sheet is seated on the upper surface of the reservoir block, the edge portion of the lower permeable sheet is first finished in a state of wrapping the side portion of the reservoir block, and the edge portion of the finishing permeable sheet is secondarily finished in a state of wrapping the side portion of the reservoir block and the edge portion of the lower permeable sheet. Claim 10 In claim 7, the other side portion of the front side and the other side portion of the rear side of the permeable sheet of the water storage diffusion drainage member are each horizontally cut to a certain length, and the other side portion of the permeable sheet of the water storage diffusion drainage member located in the upper and lower directions of the cut portion of the permeable sheet of the water storage diffusion drainage member is spread out in the upper and lower directions of the permeable sheet of the water storage diffusion drainage member, and as the other side portion of the permeable sheet of the water storage diffusion drainage member is spread out, the other side portion of the drainage diffusion frame exposed from the permeable sheet sequentially penetrates the edge portion of the lower permeable sheet, which is in a state of primary finishing the side portion of the water storage tank block, and the lower side portion of the water storage tank block, and is inserted into the interior of the water storage tank block to a certain length, and the other side portion of the permeable sheet spread out in the upper and lower directions of the water storage diffusion drainage member is of the water storage tank block Structure of a paved surface embedded retention tank characterized by being joined to the edge portion of the lower permeable sheet, which has a primary finished side portion. Claim 11 The structure of a paved surface-embedded reservoir according to claim 10 further comprises an auxiliary permeable sheet having a horizontal cut line formed in the center, wherein the auxiliary permeable sheet is positioned in such a way that the other side of the permeable sheet, which is spread out in the upper and lower directions of the reservoir diffusion drainage member, is positioned between the auxiliary permeable sheet and the edge portion of the lower permeable sheet, which is in a state of primary finishing of the side of the reservoir block, and the reservoir diffusion drainage member is positioned such that the auxiliary permeable sheet is placed in the reservoir diffusion drainage member with the auxiliary permeable sheet horizontally penetrating the middle portion of the auxiliary permeable sheet through the horizontal cut line of the auxiliary permeable sheet, and the auxiliary permeable sheet is joined to the edge portion of the lower permeable sheet, which is in a state of primary finishing of the side of the reservoir block, while covering the other side portion of the permeable sheet, which is spread out in the upper and lower directions of the reservoir diffusion drainage member. Claim 12 In claim 11, the auxiliary permeable sheet comprises a front auxiliary permeable sheet having a horizontal cut line formed in the rear center; and a rear auxiliary permeable sheet having a horizontal cut line formed in the front center that communicates with the horizontal cut line of the front auxiliary permeable sheet; wherein the rear portion of the front auxiliary permeable sheet and the front portion of the rear auxiliary permeable sheet overlap such that the horizontal cut line of the front auxiliary permeable sheet and the horizontal cut line of the rear auxiliary permeable sheet are located on the same horizontal line. Claim 13 The structure of a paved-surface-embedded retention tank according to claim 7, characterized in that a paved surface is formed on the ground where the manhole is installed. Claim 14 delete Claim 15 delete

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