JPH07102824A - Construction method of heat accumulating tank and heat insulating formwork material having fixing tool used therefor - Google Patents

Abstract

PURPOSE:To improve workability and operability so as to shorten construction period and decrease cost by fitting fixing tools to a formwork material main body of synhetic resin foaming body, and projectingly embedding locking parts on the concrete placed surface of the main body. CONSTITUTION:A heat insulating formwork material 10 is arranged on a concrete placing position, and the heat insulating formwork material 10 is supported and fixed so as to assemble a formwork having a concrete placing space. Next concrete is placed in the formwork, and a heat insulation layer is formed as it is on the surface of hardened concrete. A waterproof layer is formed on the heat insulation layer by heat insulating from open air by the heat insulation layer, so as to prevent leak of storage water. A formwork material main body 11 serves both for a formwork and a heat insulation layer, it holds concrete into a decided form as the formwork at placing, and after hardening the locking parts of fixing tools 12 are embedded. Further the heat insulating formwork material 10 is surely fixed so as to form a heat insulation layer and insulate heat. In addition, by a plurality of through holes 14 provided on the formwork material main body 11, the condition of placed concrete is surely observed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a building heating and cooling facility,
The present invention relates to a heat storage tank construction method suitable for use in a district heating / cooling system and the like, and a heat insulating form material provided with a fixing tool used therefor.

[0002]

2. Description of the Related Art In recent years, with the development of high-rise buildings and housing complexes, a large number of water tanks partitioned by concrete walls have been provided in the ground, and the water tanks have been cooled or heated by using midnight power. , Store cold water or hot water,
A district heating and cooling system using an underground heat storage tank that uses the cold water or the hot water as water for cooling or heating an air conditioner in a building during the daytime has become widespread.

Conventionally, the method of constructing an underground heat storage tank in such a district heating and cooling system forms an underground space that opens upward in the ground, and a floor portion, a wall portion and a ceiling portion of the heat storage tank are formed in this underground space. Assemble a plywood weirboard formwork for construction, pour concrete into this formwork, dismantle and remove the formwork after the concrete has hardened, then smooth the concrete surface and foam urethane resin A heat insulating layer such as the above is sprayed or a heat insulating material such as an expanded polystyrene plate is attached to form a heat insulating layer on the inner wall surface of the concrete heat storage tank to be constructed. Further, waterproofing work is performed in which the surface of the heat insulating layer is subjected to a primer treatment and then a waterproof material is applied or a waterproof sheet is attached to form a waterproof layer.

[0004]

However, the above-mentioned conventional method for constructing a heat storage tank has the following problems to be solved. That is, since the plywood dams are used for the formwork, the formwork must be dismantled and removed after the concrete hardens, resulting in a longer construction period and an increase in construction cost.

Further, since the work of forming the heat insulating layer / waterproof layer is carried out after the concrete skeleton work is completed, not only the construction period is prolonged, but also the ceiling floor part, Since the scaffolding gantry for work above the wall and the materials for these works are carried in, the working environment is significantly deteriorated.

The present invention has been made in view of the above problems, and constructs a heat storage tank capable of shortening the construction period and the construction cost by significantly improving the construction workability and workability. An object of the present invention is to provide a heat insulating form material provided with a method and a fixing tool used therefor.

[0007]

A method for constructing a heat storage tank according to claim 1 of the present invention is a method for constructing a heat storage tank in which a heat insulating layer and a waterproof layer are formed on a concrete surface, and the concrete pouring position In addition to arranging a heat insulation form material in
This is supported and fixed to assemble a formwork having a concrete placing space, then concrete is placed in the formwork to construct a concrete skeleton and a heat insulating layer, and a waterproof layer is formed on the surface of the heat insulating layer. It is characterized by doing so.

A heat-insulating mold material provided with a fixing tool according to a second aspect of the present invention relates to the heat-insulating mold material used in the method for constructing a heat storage tank according to the first aspect, and is a synthetic resin plate foam having a plate shape. It is composed of a formwork material body composed of a body and a fixing tool attached to the formwork material body, and the fixing tool projects from the concrete placing surface of the formwork material body and is embedded in the placed concrete. It is characterized in that a locking portion is formed.

A heat insulating mold material provided with a fixing tool according to a third aspect of the present invention relates to a heat insulating mold material having the fixing tool according to the second aspect, wherein concrete is cast on the mold material body. A feature is that a plurality of holes for confirming the state are formed.

[0010]

In the invention of claim 1, when the concrete skeleton constituting the heat storage tank is constructed, the heat insulating form material is arranged at the concrete pouring position and the heat insulating form material is supported and fixed. A mold having a concrete pouring space is assembled, and concrete is poured into the mold, so that the heat insulating layer is formed on the surface of the hardened concrete as it is. The heat insulation layer blocks heat from and to the outside air and forms a waterproof layer on the surface of the heat insulation layer, thereby preventing leakage of stored water.

According to the second aspect of the invention, the form material main body is
Since it also serves as a formwork and heat insulation layer, when placing concrete, hold concrete in a prescribed shape as a formwork,
After the concrete is hardened, the locking portion of the fixing jig is embedded in the concrete, the heat insulating form material is securely fixed, and the heat insulating layer is formed as it is to block heat.

According to the third aspect of the invention, in addition to the above-mentioned action, the state of the cast concrete can be reliably observed by the plurality of holes formed in the main form material body.

[0013]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. FIG. 1 shows an embodiment of a heat storage tank constructed by the method for constructing a heat storage tank according to the present invention. In the figure, reference numeral 1 is a heat storage tank, 2 is a manhole, 3 is a ladder, 4 is a communication hole for communicating each heat storage tank, and G is a ground.

As shown in FIGS. 1 (a) and 1 (b), an upwardly opening recess 6 is excavated in the ground G, and a pressure plate 7 is constructed at the bottom of the recess 6. . An underground beam (concrete frame) 8 is formed on the pressure board 7 to define the recesses 6 in a plan view, and a ceiling slab (concrete frame) 9 is formed on the underground beam 8. Has been formed. Each of the pressure board 7, the underground beam 8 and the ceiling slab 9 is made of reinforced concrete, and constitutes a bottom board portion, a side wall portion and a ceiling floor portion of the heat storage tank 1.

Pressure board 7, underground beam 8, and ceiling slab 9
A heat insulating layer H for blocking the temperature between the cold water or the hot water stored in the heat storage tank 1 and the outside air is formed on the inner surface of the underside and the inner surface of the communication hole 4 formed in the underground beam 8. On the heat insulating layer H, a waterproof layer W that prevents the cold water or hot water from leaking is formed.

2 and 3 show an example of the heat insulating form material 10 constituting the heat insulating layer H, which constitutes the heat insulating layer of the underground beam 8 and the ceiling slab 9.
As shown in FIGS. 2A and 2B, the heat insulating mold material 10
Is composed of a frame body 11 having a substantially rectangular plate shape when viewed from the front, and fixing tools 12 fixed to the frame body 11 at predetermined intervals in the vertical and horizontal directions.

The mold frame body 11 is made of a synthetic resin plate foam. Examples of the foam include styrene homopolymer, styrene-maleic anhydride, styrene-acrylonitrile, polystyrene-based resin particles such as styrene-methyl methacrylate copolymer, butane, and foaming properties of pentane. After pre-foaming the resin particles, it is filled in the mold bulk of the mold, expanded by heat expansion with a heating medium such as the above, and has a bending strength equivalent to that of a conventional synthetic dam frame obtained by foam molding. Expansion ratio is about 10
It is particularly preferable to use a foamed bead plate-shaped molded product having an expansion ratio of up to 20 times.

Insert holes 13 are formed in the main frame material body 11 at predetermined intervals in the vertical and horizontal directions. Further, FIG.
As shown in FIG. 5, a substantially circular recess 13b is formed in a plan view at the peripheral edge of the opening end 13a of the side 11a of the insertion hole 13 that does not face concrete. Further, through holes (holes) 14 for confirming a concrete pouring state are formed in the form material main body 11 so as to surround these through holes 13 at predetermined intervals in vertical and horizontal directions (FIG. 3). (B)
reference). The through holes 14 ... Have a size such that only the paste component of the cast concrete comes out (however, the heat insulating type that constitutes the heat insulating layer H of the ceiling slab 9 shown in FIG. 1B above). These through holes 13 may not be provided in the frame material 10).

As shown in FIG. 3 (a), the fixing device 12 is a molded body made of synthetic resin, and has a tubular anchor 15 having a screw hole 15a and a screw hole 15a through the insertion hole 13. A side 11b of the formwork material body 11 facing the concrete, which has a male threaded portion 16a to be screwed.
And a set screw 16 fixed to

At one end of the anchor 15, the form material main body 11 is formed.
An abutting flange portion 15b that abuts on the concrete-facing side 11b, and a locking flange portion (a locking portion) that is embedded in the cast concrete at the other end.
15c is formed.

The head 16b of the set screw 16 is formed in the recess 13
It is formed in a substantially circular shape in a plan view so that it can be fitted into b, and a screw groove (not shown) for tightening is formed on the upper surface thereof. Further, the thickness thereof is set so as to be substantially flush with the upper surface of the side 11a of the formwork material body 11 that does not face the concrete when the set screw 16 is screwed onto the anchor 15.

Next, a method of constructing the heat storage tank 1 using the heat insulating mold material 10 will be described with reference to FIGS. 4 to 7.

First, as shown in FIG. 4, reinforcing reinforcing bars (not shown) for the pressure plate 7 constituting the surface plate portion of the heat storage tank 1 are laid out and the lower end portion of the underground beam 8 is arranged. Reinforcing reinforcing bars 8a are laid out, and the driving form 7a of pressure plate 7 is further
After assembling the concrete, concrete C is placed in the driving form 7a.

Next, after the cast concrete C is hardened, as shown in FIG. 5, a reinforcing bar 8b is further added above the reinforcing bar 8a of the underground beam 8. And FIG.
As shown in (a) and (b), these reinforcing bars 8
The anchors 15 ...
Are opposed to each other so as to face the reinforcing reinforcing bars 8a and 8b, and the heat insulating form material 10 is supported and fixed by the separator 17, the seat component 18, the form tightening metal fitting 19 and the end steel pipe 20. The driving form 21 for the center beam 8 is assembled to form the concrete placing space S. here,
As for the method of supporting and fixing the driving form 21, the anchor 15 is used instead of the seat part 18, and the form clamp 19 is attached instead of the set screw 16, and these, the separator 17, the end steel pipe 20 ... You may make it support-fix the said heat insulation form material 10 ... using.

Further, as shown in FIG. 7, the heat insulating form material 10 is processed into a predetermined shape as required, and the anchor 15 is directed upward so that the driving form 21 for the underground beam 8 is formed.
It is installed on the top and supports the end steel pipe 22 ... 23
And the driving form 24 for the ceiling slab 9 is assembled. After that, reinforcing reinforcing bars (not shown) are arranged on the driving form 24.

The underground beam 8 assembled in this way,
Concrete of a predetermined mixture is poured, filled and cured in the driving molds 21 and 24 for the ceiling slab 9. Here, when placing the concrete of the underground beam 8, the through hole 1
Check while checking the condition of the placed concrete by using 4 ... And after placing a certain amount of concrete,
Carry out. Further, after the desired strength development is obtained in the concrete, the support of the driving form 24 is released, and the separator 23, the end steel pipe 22, the form clamping member 19 of the driving form 21, the end steel pipe 20 ... Remove.

After that, some irregularities on the exposed surface of the heat insulating mold material 10 are adjusted to be smooth to form the waterproof layer W (see FIG. 1). The waterproof layer W is formed by applying a primer on the surface of the heat insulating mold material 10 and then applying a waterproof material, but may be formed by attaching a waterproof sheet.

In the method of constructing the heat storage tank 1 of the above-described embodiment, when constructing the underground beam 8 and the ceiling slab 9 constituting the heat storage tank 1, the heat insulating form material 10 provided with the fixing tool 12 is supported. The driving forms 21 and 24 which are fixed and have the concrete pouring space S are assembled, and these driving forms 2 are
Concrete C is placed in the inside of 1 and 24. Then, the concrete C is hardened and the locking flange portion 15c of the fixing jig 12 is embedded in the concrete and firmly fixed, and the heat insulating layer H is formed as it is. The heat insulation layer H blocks heat from and to the outside air, and the waterproof layer W formed on the surface of the heat insulation layer H prevents leakage of stored water.

Further, in the heat insulating mold material 10 of the above-mentioned embodiment, since the mold material body 11 also serves as a mold and a heat insulating material, when the concrete C is cast, the concrete C is used as the mold. After the concrete C is held in a predetermined shape and hardened, the heat is cut off as the heat insulating layer H as it is. At this time, the anchor 15 of the fixing tool 12 fixed to the frame body 11 is fixed.
However, by being embedded in the concrete C to be cast, the heat insulating form 10 is reliably fixed to the concrete surface. Further, the through hole 14 formed in the mold body 11
... (see FIG. 2), the concrete is poured while confirming the concrete pouring state in the driving molds 21 and 24.

As described above, according to the method of constructing the heat storage tank 1 of the above-described embodiment, the heat insulating form material 10 is arranged at the concrete pouring position, and the heat insulating form material 10 is supported and fixed to the ground. Driving form 21, 24 for beam 8 and ceiling slab 9
The heat-insulating material form 10
Is formed as a heat insulating layer H on the surface of the hardened concrete as it is. Therefore, it is not necessary to dismantle and remove the formwork after concrete hardening like the conventional plywood weirboard formwork, and the subsequent construction of a heat insulating layer is also unnecessary.
The waterproof layer W can be formed immediately, the workability and workability can be significantly improved, and the work period and the work cost can be shortened.

Further, the heat insulating mold material 10 of the above embodiment functions as a mold at the time of pouring concrete, and after the concrete is hardened, the locking flange portion 1 of the fixing jig 12 is provided.
By embedding 5c in the cast concrete, it is firmly fixed to the surface of the concrete and functions as the heat insulating layer H as it is, so that the waterproof layer W can be formed immediately on the surface. Therefore, the workability and workability can be significantly improved, which can shorten the construction period and the construction cost. Further, since a plurality of through-holes 14 ... Are bored in the form material main body 11 and the work can be carried out while confirming the concrete pouring state, it is possible to perform the construction in which the filling property of the concrete is improved. . Moreover, since the material is a synthetic resin plate-like foam, it is lightweight, and can be processed according to the mode of use on site, and is excellent in handling.

In the above embodiment, the driving molds 21 and 24 were assembled on the premise that the heat storage tank 1 was cast simultaneously with the underground beam 8 and the concrete of the ceiling slab 9. The beams 8 and the concrete of the ceiling slab 9 may be separately cast. In such a case, after assembling the driving form 21 for the underground beam 8, concrete placement is performed.
It goes without saying that the underground slab 8 may be constructed, then the driving form 24 for the ceiling slab 9 may be assembled, and concrete may be cast to construct the ceiling slab 9.

Further, the concrete to be poured is not limited to the above examples, and fiber reinforced concrete in which various kinds of reinforcing fibers such as steel fiber, carbon fiber, aramid fiber and glass fiber are mixed can be used. Alternatively, instead of the reinforcing reinforcing bar, a reinforcing material formed by molding these reinforcing fibers into a predetermined shape may be disposed for reinforcement.

Further, in the above embodiment, the heat insulating mold material 1 is used.
Although the shape of 0 has a substantially rectangular shape when viewed from the front, the shape is not limited to this, and it goes without saying that the shape can be appropriately changed in the molding step depending on the mode of use.

When constructing the ceiling slab 9, the heat insulating frame material 10 is fixed to the lower surface of the ceiling slab in advance to form a half precast concrete plate, and after constructing the underground beam 8 as described above, The ceiling precast concrete slab may be constructed by installing and fixing the half precast concrete plate on the underground beam 8, arranging reinforcing bars on the upper surface of the half precast concrete plate, and placing concrete.

[0036]

EFFECTS OF THE INVENTION According to the method of constructing a heat storage tank and the heat insulating mold material used therefor according to the present invention, the following effects can be achieved. According to the method for constructing the heat storage tank of claim 1, the heat insulating mold material is disposed at the concrete pouring position, and the heat insulating mold material is supported and fixed to assemble the mold, and the heat insulating mold material is assembled in the mold. Since the concrete is poured, the heat insulating form material is directly formed as a heat insulating layer on the hardened concrete surface. Therefore, it is not necessary to dismantle and remove the mold after hardening concrete, such as the conventional plywood weir board form, and the subsequent construction of a heat insulating layer is not necessary, and the waterproof layer can be formed immediately. The workability and workability can be greatly improved, and the work period and the work cost can be shortened.

The heat insulating form material according to claim 2 is used as a form at the time of pouring concrete, and after the concrete is hardened, the locking portion of the fixing jig is embedded in the concrete. As a result, it is firmly fixed on the concrete surface and functions as it is as a heat insulating layer, so that a waterproof layer can be formed immediately on the surface. Therefore, the workability and workability can be significantly improved, which can shorten the construction period and the construction cost. Moreover, since the material is a synthetic resin foam, it is lightweight, and can be processed according to the mode of use on site, and is excellent in handling.

According to the heat insulating form material of claim 3, in addition to the above effects, a plurality of holes are formed in the main body of the form material, and the work can be performed while confirming the concrete pouring state. Since it is possible to proceed, it is possible to perform construction with an improved filling property of concrete.

[Brief description of drawings]

1A and 1B are views showing a heat storage tank constructed by the same process, in which FIG. 1A is a plan sectional view of a main part, and FIG. 1B is a side sectional view of the main part.

2A and 2B are views showing an embodiment of a heat insulating form material used in the heat storage tank according to the present invention, wherein FIG. 2A is a front view and FIG. 2B is a side sectional view.

FIG. 3 is a view showing an example of construction of a heat insulating layer by the heat insulating form material, FIG. 3A is a side sectional view of a main part showing the vicinity of the fixing tool,
(B) is a principal part side sectional view showing the vicinity of the through hole.

FIG. 4 is a view showing a step of constructing a heat storage tank according to an embodiment of a method for constructing a heat storage tank according to the present invention, and a sectional view of a main part showing a step of constructing a surface plate section.

FIG. 5 is a diagram showing a process of constructing the same heat storage tank, and is a side sectional view of an essential part showing a state where reinforcing reinforcing bars of underground beams are reinforced.

6A and 6B are diagrams showing a process of constructing the heat storage tank, in which FIG. 6A is a sectional view of a main part showing a state in which a driving form for an underground beam is assembled, and FIG. 6B is a side view of the main part. .

FIG. 7 is a diagram showing a process of constructing the heat storage tank, and is a main-part front cross-sectional view showing a state in which a driving form for a ceiling slab is assembled.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heat storage tank 8, 9 Concrete skeleton 10 Insulating formwork material 11 Formwork material body 12 Fixing tool 14 ... Through hole 15c Locking part 21, 24 Formwork C Concrete H Insulating layer S Concrete placing space W Waterproof layer

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Kensaku Yasui 2-1-1 Nishishinjuku, Shinjuku-ku, Tokyo Within Sekisui Plastics Co., Ltd. (72) Inventor Masao Obata 1-2-3 Shibaura, Minato-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Hisao Tomonaga 1-32 Shibaura, Minato-ku, Tokyo Shimizu Construction Co., Ltd. (72) Shigeru Iida 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Construction Co., Ltd. In the company

Claims (3)

[Claims] 1. A method for constructing a heat storage tank comprising a heat insulating layer and a waterproof layer formed on a concrete surface, wherein a heat insulating form material is arranged at a concrete pouring position, and the concrete is fixed and supported by the concrete. A formwork having an installation space is assembled, and then concrete is poured into the formwork to construct a concrete skeleton and a heat insulating layer, and a waterproof layer is formed on the surface of the heat insulating layer. How to build a heat storage tank. 2. A heat insulating mold material comprising a fixing tool used in the method for constructing a heat storage tank according to claim 1, wherein the mold material main body is made of a plate-shaped synthetic resin foam, and the mold material. A fixing tool attached to the main body, wherein the fixing tool is formed with a locking portion projecting from a concrete placing surface of the formwork material main body and embedded in concrete to be placed. A heat insulation form material with a fixing tool. 3. The heat insulating mold material provided with the fixing tool according to claim 2, wherein the mold material body has a plurality of holes for confirming a concrete pouring state. A heat insulation form material with a fixing tool.