KR101694681B1 - Water strorage facility and constructing method thereof - Google Patents

Abstract

According to an embodiment of the present invention, a water storage tank comprises: a bottom layer which is formed by depositing a concrete material at a site; a side wall which is formed by airtight coupling of PC wall bodies which are independently installed on the bottom layer and encircle a water storage space; a plurality of PC columns which can be independently installed on the bottom layer; PC girders with a beam function which connects upper end portions of the PC wall bodies; and an upper layer which is formed by depositing the concrete material at the site after installing PC slabs arranged between the PC girders. First and second iron rebar arrangement layers, which connect the PC wall bodies to the PC columns, and a lower slab layer in which the first and second iron rebar arrangement layers are embedded at the site are included in the bottom layer. The present invention provides the water storage tank which can have the bottom layer in various sizes.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a retention tank,

The present invention relates to a storage tank and a method of manufacturing the same, and more particularly, to a storage tank and a method of manufacturing the same. More particularly, the present invention relates to a storage tank and a method of manufacturing the same, And a method of constructing the same.

Recently, as buildings increase or the packing ratio of the surface increases, the tendency of rainwater to flow directly into sewer or river without infiltration into the underground is increasing. In addition, flooding may occur if the flow rate to the sewer or river exceeds the allowable amount due to the amount of precipitation. On the other hand, if the amount of water penetrated into the ground is small, the underground water becomes insufficient. This causes problems such as the drought, and the water quality of the river is reduced due to the dry season.

In recent years, reservoirs have been installed to store rainwater and allow it to flow out to rivers when necessary.

These reservoirs can be constructed by pouring concrete on site and by assembling precast (PC) concrete blocks on site.

In this case, in the case of the storage tank by the on-site pouring method, there is a problem that initial cracks are easily generated due to the pouring in the field, the water tightness is lowered, and a large amount of waste is generated during the construction, There are considerable problems in terms of environmental performance and economy.

In order to solve the problems of the spot installation method, there are many problems in the alignment of the PC block or the PC column due to manufacturing errors in the case of the storage tank by the PC method.

In order to solve these problems in alignment, the method of construction is very complicated and the workability is low. In addition, there is a problem such as a decrease in water tightness and the like, and there is also a problem that the inner cross section width of the reservoir can only be reduced .

In addition, conventional reservoirs can not take into consideration the characteristics of the ground, so that the structural stability against the soft ground and the uneven settlement deteriorate. In addition, anchor, Bolts and the like are required in advance and there is a problem in that the workability is low because a work for interconnecting them is required during the construction.

In addition, such a storage tank has a structure in which each member is assembled by connecting it with a bolt, a PC steel wire, and an anchor steel bar, so that the construction is complicated and the watertightness of the connection portion of the member is difficult to maintain.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to use a very complicated means for aligning according to manufacturing errors of prefabricated PC blocks or PC columns and for mutual connection therebetween. The present invention provides a storage tank and its construction method capable of solving the problem by combining with the floor laying of the bottom layer, increasing the workability and varying the size of the bottom layer.

It is also an object of the present invention to provide a storage tank which is structurally stable irrespective of the bottom layer characteristics of the storage tank and which is capable of self-supporting the PC block or the PC column with respect to the bottom tank.

It is another object of the present invention to provide a reservoir and its construction method capable of maintaining durability and watertightness at connection portions of members.

According to an embodiment of the present invention, there is provided a storage tank comprising: a bottom layer formed by casting a concrete site; side walls formed by watertight coupling between the bottom wall and the PC wall surrounding the water storage space; A PC girder having a beam function to connect the upper end of the PC wall and a PC slab disposed between the PC girder and an upper layer formed by concrete spotting, And a lower reinforcing bar protruding from the base of the PC column or fixed to the base of the PC column by inserting into the base of the PC column, A first reinforcement layer protruding from the wall portion of the PC wall, And a second reinforcement layer protruded from the column of the PC column or connected to an upper reinforcement rod inserted and fixed in a column of the PC column in the field, wherein the first reinforcement layer and the second reinforcement layer, And a lower slab layer formed by casting a second reinforcing steel layer on a concrete site.

A method of constructing a reservoir according to an embodiment of the present invention includes: a first step of forming a horizontal abandoned concrete layer by locating the abandoned concrete on the floor after disposing the bottom of the reservoir; and a second step of forming a horizontal abandoned concrete layer on the abandoned concrete layer A third step of arranging a plurality of freely movable PC columns on the abandoned concrete layer, and a third step of disposing the lower reinforcing bars projected from the bottom plate of the PC wall and the PC columns A fourth step of forming a first lower reinforcing layer by connecting the lower reinforcing bars installed in the base portion to the assembled reinforcing steel net, and a fourth step of reinforcing the reinforcing bars formed in the reinforcing bars of the wall portions of the PC wall, A fifth step of connecting the upper reinforcing bars to the assembled reinforcing bars to form a second lower reinforcing layer, A PC girder connecting the upper end of the PC wall to the upper end of the PC column and a PC girder connecting the lower end of the PC column to the lower end of the PC girder, And an eighth step of forming an upper slab layer by laying an upper reinforcing bar on the PC slab and casting concrete onto the PC slab.

According to one embodiment of the present invention, problems in alignment due to manufacturing errors of prefabricated PC blocks or PC columns and the problem of using very complicated means for mutual connection between them are combined with field installation of the floor It is possible to provide a reservoir tank capable of increasing the workability and varying the size of the bottom layer while solving the problems, and a method of construction thereof.

According to an embodiment of the present invention, it is possible to provide a storage tank that is structurally stable regardless of the characteristics of the bottom layer of the storage tank and can maintain the PC block or the PC column independently of the bottom tank, and a construction method thereof .

According to an embodiment of the present invention, it is possible to provide a reservoir and its construction method in which durability and water tightness can be maintained at a connection portion of a member, and it is possible to provide a reservoir A fixed installation method can be provided.

1 is a partially exploded perspective view of a reservoir tank for explaining a reservoir tank and a construction method thereof according to an embodiment of the present invention.
2 is a cross-sectional side view taken along line AA of FIG. 1 to illustrate a reservoir bottom layer and a construction method thereof according to an embodiment of the present invention.
FIG. 3 is a partially enlarged perspective view of a sidewall for explaining a reservoir tank and a construction method thereof according to an embodiment of the present invention. Referring to FIG.
FIG. 4 is a side sectional view of FIG. 3 illustrating a reservoir and its construction method according to an embodiment of the present invention.
FIGS. 5A and 5B are rear perspective views of FIG. 3, respectively, according to one embodiment and an alternate embodiment of the present invention.
FIG. 6 is a cross-sectional view taken along the line II of FIG. 1 for explaining a reservoir tank and a construction method thereof according to an embodiment of the present invention.
7 is a cross-sectional view taken along the line II-II of FIG. 1 for explaining a reservoir tank and a method of constructing the reservoir tank according to an embodiment of the present invention.
FIG. 8 is a cross-sectional side view taken along line BB of FIG. 1 to illustrate the reservoir upper layer and its construction method according to an embodiment of the present invention.
FIGS. 9A and 9B are perspective views of a storage tank upper layer according to an embodiment of the present invention and a PC girder and a PC slab used in the construction method.
10 is a flowchart illustrating a method of constructing a storage tank according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings.

1, the storage tank 100 according to a preferred embodiment of the present invention includes a bottom layer 110 formed by concrete spotting and a PC wall 30 surrounding the water storage space A PC girder 50 having a function of connecting a plurality of PC columns 10 capable of standing on the bottom layer 110 in a self-supporting manner to the upper end of the PC wall 30, and a PC girder 50 50, and a top layer 150 formed by concrete spotting after the PC slabs 70 are assembled.

The PC column 10 includes an extended upper end portion 11 which is widened to the upper end so that the PC girder 50 is stably disposed and a flat upper end portion 11 which is disposed on the bottom layer 110 by a crane, And a column portion 15 connecting the extended upper end portion 11 and the base portion 13 to each other.

A first reinforcing through hole 13a to which a lower reinforcing bar 39 to be inserted and fixed in the field is to be coupled to the base portion 13 of the PC column 10; And a charging groove 13b capable of charging the mortar so as to be integrated with the base portion 13 of the base 10.

 A second reinforcing through hole 15a may be formed in the lower portion of the column 15 so that the upper reinforcing bar 41 can be inserted and fixed.

Since the lower reinforcing bar 39 or the upper reinforcing bar 41 is fixed to the PC column 10 in the field, the PC column 10 is easy to carry and stand alone.

The bottom layer 110 is formed of a discarded concrete layer 111 placed so as to provide a horizontal plane substantially parallel to the ground after the tearing and the PC wall 30 and the PC columns 10 Are formed by inserting and fixing the lower reinforcing bars 39 to the PC wall 30 and the PC columns 10 and arranging a reinforcing bar or a reinforcing bar net therebetween, The upper reinforcing bar 41 is inserted and fixed to the PC wall 30 and the PC column 10 and a reinforcing bar or an assembled reinforcing bar mesh is disposed therebetween And a lower slab layer 117 formed by concrete spotting so as to fill the first and second reinforcing layers 113 and 115.

2, the bottom layer 110 of the storage tank 100 according to the preferred embodiment of the present invention is formed by placing the PC wall 30 and the PC pillar 100 on a shredded concrete layer 111 The lower reinforcing bar 39 is inserted and fixed in the first reinforcing through hole 13a formed in the base 13 of the PC column 10 and the lower reinforcing bar 39 is fixed to the lower portion of the PC wall 30, The first reinforcing layer 115 may be formed by connecting a lower reinforcing bar 39 protruding from the plate 31 at a predetermined interval or being inserted and fixed in the field by a reinforcing bar or a reinforcing steel net, A second reinforcing steel through hole 15a formed in the lower portion of the column 15 and a reinforcing bar 35ab arranged at a predetermined interval below the wall portion 33 of the PC wall 30, And the lower slab layer 117 is formed by pouring concrete after connecting between the reinforcing bars or the assembly reinforcing net, The base portion 13 of the PC column 10 and the bottom plate portion 31 of the PC wall 30 are disposed in the layer 110 between the first reinforcing layer 113 and the second reinforcing layer 115, As shown in FIG.

Since the first reinforcing layer 113 and the second reinforcing layer 115 include a reinforcing bar or a reinforcing bar net having a short length, it is easy to carry and transport the short reinforcing bar or the assembled reinforcing bar net while ensuring durability. can do.

Further, it is not necessary to align the PC wall 30 or the PC column 10 to fix the bottom wall 110 to the floor.

The base portion 13 of the PC column 10 may be a rectangular column shape providing a horizontal plane so as to be simply aligned with respect to the PC wall 30.

3 to 6, a reservoir wall and a construction method thereof according to an embodiment of the present invention will be described in detail.

 FIG. 3 is a partially enlarged perspective view of a sidewall for explaining a storage tank and a construction method thereof according to an embodiment of the present invention. FIG. 4 is a view for explaining a storage tank and a construction method thereof according to an embodiment of the present invention. 3 is a rear perspective view of FIG. 3 according to an embodiment of the present invention, and FIG. 6 is a side view of a reservoir and its construction method according to an embodiment of the present invention. FIG. 7 is a cross-sectional view taken along line II-II of FIG. 1 for explaining a reservoir tank and a method of constructing the reservoir tank according to an embodiment of the present invention.

Referring to FIG. 3, the PC wall 30 includes a bottom plate 31 and a wall portion 33. The wall portion 33 and the bottom plate portion 31 have a plate shape and are integrally formed. The wall part (33) and the bottom plate part (31) make the PC wall (30) generally L-shaped.

The length a of the bottom plate 31 may be less than a predetermined length. The length (a) may be shortened in order to minimize degradation of the transportability or the loadability of the PC wall 30. Since the PC wall 30 has an L shape, the bottom plate 31 protrudes from the wall 33. By forming the protrusion of the bottom plate 31 to have a short length a, It is possible to minimize the degradation of the transportability or the loadability of the substrate 30.

On the other hand, in the case where the side wall of the storage tank is formed to have a short length corresponding to the length (a) of the bottom plate portion 31, the side wall of the storage tank may receive a pressure of gravel or the like, According to the PC according to the present invention and the method of constructing the same, the problem can be solved because the bottom plate 31 integrally extends to the lower slab layer 117.

The length a of the bottom plate 31 may be a predetermined length or more. The length a may be long enough to allow the PC wall 30 to stand on the ground or abandoned concrete layer 111. In this case, since the PC wall 30 can be self-standing, there is no need to support the PC wall 30 with a steel bar or the like so that the PC wall 30 does not collapse during the installation work, and workability can be remarkably improved .

That is, with regard to the length (a) of the bottom plate 31, the length (a) is made shorter than a predetermined length to improve the transportability or the loadability, and the length Can be improved.

A lower reinforcing bar 39 extending in the direction of the length (a) of the bottom plate 31 may be embedded and protruded in the bottom plate 31. The protruding lower reinforcing bars 39 are connected to the lower reinforcing bars 39 fixed to the base portion 13 of the PC column 10 by reinforcing bars or assembled reinforcing bars, The bottom slab layer 117 is buried in the lower slab layer 117 by the placement of the lower slab layer 117 and the durability between the PC wall 30 and the PC column 10 Thereby increasing the stiffness and increasing the bonding force with respect to the lower slab layer 117 thereof.

Referring to FIG. 4, the upper reinforcing bar 41 may be inserted into a plurality of reinforcing bars 35ab (see FIG. 2) formed at a lower portion of the wall portion 33. The upper reinforcing bars 41 may be inserted into the reinforcing bars 35ab and extend in the same direction as the lower reinforcing bars 39. [

The upper reinforcing bars 41 may be inserted into the reinforcing bars 35ab and the reinforcing bar 41 may be formed with an engaging portion 41a at the ends of the upper reinforcing bars 41. [ The upper reinforcing bar 41 can be temporarily fixed to the wall portion 33 by the retaining portion 41a.

The latching portion 41a may have a bent shape as shown in FIG. 4, but may have a shape of a bolt head or the like, as shown in FIG. In addition to the above shape, the locking part 41a may have a shape that can be received in the reinforcing bar fixing groove 120 without passing through the reinforcing bar coupling 35ab.

An assembled reinforcing steel net connecting between the upper reinforcing bars 41 may be embedded in the lower slab layer 117. The rigidity of the lower slab layer 117 can be increased by the assembled reinforcing bar net.

The assembled reinforcing bar network may be connected to the upper reinforcing bars 41 and the lower reinforcing bars 39. The connection may be made by a known coupler (not shown) or welding.

The reinforcing bar coupling 35ab and the steel wire insertion port 35b may be formed to communicate with each other. When the reinforcing bar 35ab is closed by the mortar 42, the air in the reinforcing bar 35ab can be discharged through the steel wire insertion port 35b. This will be described in detail later.

According to an embodiment of the present invention, after the lower slab layer 117 is laid, the reinforcing bar fixing groove 38 and the reinforcing bar fitting 35ab may be closed by the mortar 42. [ In this case, prior to finishing by the mortar 42, concrete to be laid to form the lower slab layer 117 flows through the reinforcing bar coupling 35ab, and the reinforcing bars 35ab, 5a can be clogged. Therefore, in order to prevent the inflow of concrete, a backup agent 35ac may be installed in the reinforcing bar 35ab on the lower slab layer 117 side.

5A, the reinforcing bar fixing groove 38 is formed on the opposite side of the wall portion 33, and may be formed to be in communication with a plurality of reinforcing bars 35ab formed on the wall portion 33 at the same time. When the mortar 42 is injected into the reinforcing bar fixing groove 38 and the reinforcing bar fitting 35ab from the reinforcing bar fixing groove 38, workability can be improved by the communication.

5A, the reinforcing bar fixing grooves 38 may be formed separately for each of the plurality of reinforcing bars 35ab. However, in this case, the mortar must be injected through the reinforcing bar fixing grooves 38 in order to finish the reinforcing bar fixing groove 38 and the reinforcing bar coupling 35ab by the mortar, so that the workability may be lowered.

Therefore, it is preferable that one reinforcing bar fixing groove 38 is formed so as to communicate with the plurality of reinforcing bars 35ab like the former.

Referring to FIG. 5B, the reinforcing bar fixing groove 38 may have a plurality of protrusions 38ab. The protrusion 38ab is formed in a space in the reinforcing bar fixing groove 38 and may be formed in a space outside the space occupied by the end of the reinforcing bar fitting 35ab and the engaging portion 41a of the upper reinforcing bar 41. [

By forming the projecting portion 38ab, the amount of mortar filled in the reinforcing bar fixing groove 38 can be reduced.

The reinforcing bar fixing groove 38 may be formed so as to communicate with the plurality of reinforcing bars 35ab at the same time when the protrusion 38ab is formed. 38 and the reinforcing bar coupling 35ab can be improved.

The upper reinforcing bar 41 is installed in the second reinforcing steel through hole 15a formed to pass through the lower portion of the column 15 of the PC column 10, 15, respectively.

As described above, between the lower portion of the wall portion 33 of the PC wall 30 and the lower portion of the column 15 of the PC column 10, the upper reinforcing bars 41 integrated by the mortar 42, It can be seen that the rigidity of the lower slab layer 117 can be increased by forming the second reinforcing layer 115 by being connected to the reinforcing bars or the assembled reinforcing net.

FIG. 6 is a cross-sectional view taken along line I-I of FIG. 1, showing a bidirectional steel wire fixing apparatus for bonding and fixing adjacent PC units.

The bidirectional steel wire fixing device 3 is disposed in the steel wire fixing groove 32a of the PC wall 30 and the PS steel wire 5 is inserted into the steel wire insertion port 35a to be combined with the bidirectional steel wire fixing device 3 .

The bidirectional steel wire fixing device 3 has a hollow coupling member 3a and a cone shaped wedge hole 3b at its center and a smaller diameter side of the wedge hole 3b is connected to the coupling member 3 A pair of wedge cone members 3c detachably coupled to both ends of the coupling member 3a so as to face the outside of the wedge cone member 3c, And a wedge 3d for fixing the PS steel wire 5 by being inserted into each of the wedge holes 3b.

A thread may be formed on the inner circumferential surfaces of both ends of the coupling member 3a so that the pair of wedge cone members 3c can be detachably coupled to the coupling member 3a, A thread line corresponding to the thread of the coupling member 3a may be formed on the outer circumferential surface of the pair of wedge cone members 3c. And the wedge cone member 3c can be releasably screwed to both ends of the coupling member 3a by the screw thread.

A cone-shaped wedge hole 3b is formed at the center of the pair of wedge cone members 3c. The wedge hole 3b has a cone shape corresponding to the wedge hole 3b and has a PS wire 5 A wedge 3d having a structure capable of receiving a wedge can be inserted.

The PS wire 5 entering from the left side is fixed by the PS wire 5 entering from the right side and one bidirectional steel wire fixing device 3 respectively so that the adjacent PC wall 30 can be joined and fixed have.

The grooves 31b may be filled with grout material. The grooves 31b may be filled with grout material. In order to prevent breakage of grout material due to direct contact between the filling surfaces of the grooves and the PC wall 30, The backup agent 2 may be disposed.

Meanwhile, a corrugated hollow closing water-absorbing platen 1 may be provided in another fixing groove 31a formed along the joining surface 31 of the PC wall 30 to increase water tightness.

7, the first and second plate-like fixing parts 1b and 1c of the pleated hollow closing water diaphragm 1 are fixed to the fixing grooves 31ab of the joint surface 31 of the PC wall body 30, The hollow wrinkle portion 1a is closely attached to the stretch allowable fixing groove 31aa with the wrinkle formed in the longitudinal direction so that the mortar 9 is attached to the hollow portion 1aa It can be seen that the hollow wrinkles 1a can be stretched and expanded to prevent water leakage even when the PC walls 30 are separated or cracked due to the fact that they are not filled .

8 to 9B, a description will be made of the upper reservoir and the construction method thereof according to an embodiment of the present invention.

FIG. 8 is a side cross-sectional view taken along line BB of FIG. 1 for explaining a reservoir upper layer and a construction method thereof according to an embodiment of the present invention. FIGS. 9A and 9B are views And a PC girder and a PC slab used in the construction method.

8, in order to form the upper layer 150 of the storage tank 100 which is durable against earth pressure, a plurality of the PC columns 10 are disposed between the upper end of the PC wall 30 and the PC columns 10, And a PC slab 70 is provided on the PC girder 50 in parallel.

9A, a PC girder 50 provided as a transverse beam structure supporting the PC slab 70 has first and second coupling grooves 51 and 53 at both ends, respectively, and the PC A pair of reinforcing bars may be connected to the extended upper end 11 of the PC column 10 by a known coupling means.

The PC slabs 70 are disposed between the PC girders 50 arranged in this manner. The PC slabs 70 also have first and second coupling grooves 71 and 73 at both ends thereof, Can be coupled and connected on the PC girder (50).

8, when the PC girder 50 and the PC slab 70 are assembled, an upper reinforcing bar, which may be a reinforcing bar assembly net, is disposed to form an upper reinforcing layer 153, The upper slab layer 157 is formed with the topping concrete disposed thereon to complete the upper layer 150 of the storage tank 110.

5A and 5B are a perspective view and a side cross-sectional view illustrating a process of forming an upper layer of a method of constructing a storage tank according to an embodiment of the present invention, and FIG. 6 is a cross-sectional view of a completed storage tank according to an embodiment of the present invention. FIG.

5A and 5B, the PC column 10, the PC wall 30, the PC girder 50, and the PC slab 70 are used to assemble the reservoir, but almost all of the bolts and the anchor- The structure is hardly used and the concrete pavement is combined so that the entire side surfaces provide almost one integrally connected cross section so that the inside and the periphery of the reservoir 110 are organized and when the construction is completed, And water tightness.

Referring now again to FIG. 10, a method of constructing a reservoir tank according to an embodiment of the present invention will be described in detail.

10 is a flowchart illustrating a method of constructing a storage tank according to an embodiment of the present invention.

A method of constructing a reservoir according to an embodiment of the present invention will be described. The bottom layer 110 of the reservoir 100 is formed by in-situ casting. In order to level the bottom surface of the reservoir space, Thereby forming a foreclosed concrete layer 111 (S100).

The PC wall body 30 which is capable of independently standing in order to surround the water storage space with respect to the abandoned concrete layer 111 is installed in a self-sustaining manner (S200).

At this time, a water-tightness can be improved by providing a corrugated hollow closing watertightness plate 1 in the fixing groove 31b between the PC walls 30 and the steel wire 5 is fixed to the lower steel wire fixing groove 31a And fixed and fixed using the bidirectional fixing device 3.

A plurality of freely rotatable PC columns 10 are independently arranged on the abandoned concrete layer 111 so as to extend from the bottom plate portion 33 of the PC wall 30 and the base portion 13 of the PC column 10 The wall portion 33 of the PC wall 30 and the column portions 15 of the PC column 10 are connected to each other by a reinforcing steel net, The second reinforcing steel layer 115 is formed by connecting the reinforcing steel insertion hole 35ab formed in the second reinforcing steel through hole 35a and the upper reinforcing rope 41 connecting the second reinforcing steel through hole 15a to connect the lower reinforcing steel reinforcing layer 115 and the lower slab concrete, (Step S300).

 A PC girder 50 is installed between the PC wall 30 and the PC column 10 and the PC column 10 to form the upper layer 150 and a PC slab 70 is formed therebetween ), The upper slab reinforcement is laid and the topping concrete is laid on the upper slab reinforcement (S500), and the interior and exterior of the storage tank are finished by completing the operation (S600).

When installed in the basement, the soil can be backed up and compaction can be made on the reservoir.

In the case where the storage tank 100 is large, there is a limit to work using a crane transportation device outside the water storage space. Therefore, the water storage space is divided into at least two halves and proceeds at least two times before and after the step S400 .

That is, when the storage tank 100 is wide, a shrink concrete layer 111 is formed on the bottom surface of the water storage space to form the bottom layer 110 of the storage tank 100, and the PC wall 110 A crane conveying device is placed in the remaining part of the cross-sectional area of the storage trough with respect to a part of the cross-sectional area of the storage tank 100, and a plurality of columns are firstly arranged, the lower slab reinforcing steel is laid, A PC girder 50 and a PC slab 70 are installed on the upper portion of the lower slab wall and a crane transportation device is installed on the remaining portion outside the pool wall to form a plurality of pillar arrangements, The PC girder 50 and the PC slab 70 can be installed on the upper portion of the steel slab layer after forming the reinforcing steel rod and the lower slab layer.

110: bottom layer 111: abandoned concrete layer
113, 115: first and second lower reinforcing layer 117; The lower slab layer
130; Side wall 150: Upper layer
10: PC column 30: PC wall
50: PC girder 70: PC slab
1: Hollow type closed plate 3: Bidirectional fixing device
5: Steel wire

Claims (14)

A bottom layer formed by concrete spotting,
A sidewall formed by watertight coupling between the PC walls surrounding the water storage space,
A plurality of PC columns on the bottom layer,
A PC girder having a beam function for connecting the upper end of the PC wall and an upper layer formed by placing a PC slab disposed between the PC girder and a concrete site,
A lower reinforcing bar protruding from the bottom plate of the PC wall or inserted and fixed to the bottom plate of the PC wall at the site and a lower reinforcing bar projecting from the base of the PC column or fixed in the field at the base of the PC column A first reinforcing layer formed by connecting with a reinforcing net,
An upper reinforcing bar protruding from the wall of the PC wall or fixed to the wall of the PC wall in situ, and an upper reinforcing bar projecting from the column of the PC column or fixed to the column of the PC column And a second reinforcing layer formed by the second reinforcing layer,
The PC column is provided with a base portion which is flattened so as to be able to stand alone without fixing means,
The length of the bottom plate portion is not less than a predetermined length so that the PC wall body can be self-
The wall portion is provided with a reinforcing bar coupling and a steel wire insertion hole formed to communicate with each other,
The reinforcing bar fixing groove may be formed so that a plurality of the reinforcing bars are connected to each other at the same time,
And a lower slab layer formed by laying the first reinforcing layer and the second reinforcing layer on the concrete. The method according to claim 1,
Wherein the bottom layer further comprises a discarded concrete layer laid down to provide the same surface to the ground after the trenching. delete The method according to claim 1,
And the second reinforcing layer is formed by connecting the upper reinforcing bars to an assembled reinforcing bar net. delete The method according to claim 1,
Wherein the joint surface between the PC walls is provided with a hollow wrinkle portion formed in the longitudinal direction of the center and a hollow type jointed waterproof plate having the plate-like solid portions at both ends thereof. The method according to claim 6,
And a wedge cone member is screwed on both ends of the coupling member so that the wedge cone member is screwed to the both ends of the coupling member in the direction of width of the PC wall, And a pair of wedges for tightening the steel wire. A first step of forming a horizontal abandoned concrete layer by placing the abandoned concrete on the ground after abrading the bottom of the storage tank,
A second step of successively arranging PC walls capable of freely moving independently by providing a base portion provided on the abandoned concrete layer so as to surround the water storage space,
A third step of disposing a plurality of PC columns capable of standing up independently and inserting a steel wire with a length of a bottom plate portion being equal to or longer than a predetermined length on the abandoned concrete layer,
A fourth step of forming a first lower reinforcing layer by connecting a lower reinforcing bar protruding from a bottom plate of the PC wall and a lower reinforcing bar inserted through a base of the PC column with a reinforcing bar net,
Connecting the upper reinforcing bars to the reinforcing bar connecting holes communicating with the steel wire inserting holes of the wall portion of the PC wall and connecting the upper reinforcing bars to the reinforcing bar holes formed in the pillars of the PC columns, The molten metal is injected into the reinforcing bar fixing groove and the reinforcing bar coupling to temporarily fix the reinforcing bars to the reinforcing bar fixing groove at the rear end of the upper reinforcing bar, A fifth step of integrally fixing the bottom reinforcement layer with the bottom layer to form a second bottom reinforcing layer,
Forming a lower slab layer by laying the first lower reinforcing layer and the second lower reinforcing layer on a concrete site;
A seventh step of installing a PC girder connecting the upper end of the PC wall and the upper end of the PC column and a PC slab connecting between the PC girder and the PC girder,
And an eighth step of arranging an upper reinforcing bar on the PC slab and casting concrete on-site to form an upper slab layer. 9. The method of claim 8,
And separating at least two or more of the water storage spaces and repeating the first to sixth steps at least twice in the case where the storage tank is large. delete delete delete 9. The method of claim 8,
A second step of successively arranging the PC walls so as to surround the water storage space on the abandoned concrete layer includes a hollow wrinkle portion formed in the joining surface between the PC walls in the longitudinal direction at the center thereof, The method comprising the steps of: providing a hollow closed plate having a hollow closed end; 9. The method of claim 8,
A second step of successively arranging the PC walls so as to surround the water storage space on the abandoned concrete layer, wherein the joining surfaces between the PC walls to tense the PC walls between the walls, Tightening using a bidirectional steel wire fixing device comprising a coupling member in which a wedge cone member is coupled to a bi-directional edge by pulling an end of the wedge cone member in a screwable manner and a pair of wedges for tightening the steel wire, A method of constructing a storage tank to be installed.

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