JP2013096666A - Method of placing underground heat exchange pipe in construct - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of placing an underground heat exchange pipe in a construct capable of placing an underground heat exchange pipe simultaneously with construction of a bottom face section of a concrete building frame.SOLUTION: This method is provided to install the underground heat exchange pipe for circulating a heat medium exchanging heat with the earth, on the bottom face section of the concrete building frame of the construct. The method includes a step of forming a first blinding concrete layer 2 by depositing and curing fresh concrete onto an upper section of the ground G on which crushed stone is placed and flattened, a step of arranging the underground heat exchange pipe 10 on an upper section of the first blinding concrete layer, a step of fixing the underground heat exchange pipe to the first blinding concrete layer by fixing members 15, 16, a step of forming a second blinding concrete layer 3 on an upper section of the first blinding concrete layer by depositing and curing fresh concrete so that the underground heat exchange pipe is buried, and a step of constructing a reinforced structure 6 on an upper section of the second blinding concrete layer, and constructing the bottom face section CB of the concrete building frame CF.

Description

  The present invention relates to an installation method for an underground heat exchange pipe in which an underground heat exchange pipe is installed on a bottom surface of a concrete frame such as a structure or a building.

  The temperature in the ground is almost constant throughout the year, and is lower in summer and higher in winter than the outside air temperature. Therefore, in order to use the temperature difference from the outside air, a heat exchanger is buried in the ground and the ground heat is collected and used as a heat source of the heat pump. Various proposals have been made.

  The technology of this heat pump system using geothermal heat is to perform heat exchange using geothermal heat at a constant temperature of 10 to 15 ° C., which is almost constant in the ground. Geothermal heat can be collected and used for a heating heat source or a snow melting heat source. In summer, geothermal heat can be collected and used as a cooling heat source for cooling energy. Such a heat pump system using geothermal heat does not radiate exhaust heat from an artificial heat source such as an air conditioner or the like to the atmosphere.

Therefore, the geothermal heat pump system is attracting attention as one of the use of natural energy, for example, as a heat island suppression measure in urban areas in summer. In addition, the geothermal heat pump system may be used as a heating device, a snow melting device or the like in a cold region. Furthermore, since the geothermal heat is energy at a temperature that is more stable than the atmosphere, the heat pump system that uses geothermal heat as a heat source heat supply system that efficiently saves energy and generates less CO ₂ (carbon dioxide) It is expected to spread.

  As a method of embedding a heat exchanger for collecting underground heat in a heat pump system using underground heat, a pipe having a depth (for example, 50 to 200 m) is dug, and the lower end is formed in a U shape in the hole. 2. Description of the Related Art A vertical loop type underground heat exchanger that inserts and embeds (for example, a polyethylene U tube) is known (see, for example, Patent Document 1).

  Further, a horizontal buried type underground heat exchanger of a horizontal loop type in which a trench (moat, groove) having a depth (for example, 1 to 2 m) is dug and a heat exchanger is buried in the trench or groove is also known. . This horizontal buried type underground heat exchanger does not require the work of digging deep holes, and it is only necessary to dig a ditch or groove of a predetermined depth with a construction machine such as a backhoe. Is not suitable for Japan where the site area is small.

  Furthermore, the foundation pile type thing which installs an underground heat exchanger in the foundation pile for structures and buildings is also known. For example, the present invention relates to a ground heat utilization system using a foundation pile having a double pipe in which an outer pipe made of metal and an inner pipe made of plastic are coaxially arranged in a foundation pile and a circulation pump for circulating a heat medium. A technique is known (for example, refer to Patent Document 2). Moreover, the technique regarding the installation mechanism of the heat exchange piping which provides the heat exchange piping inside the cast-in-place pile is also known (for example, refer patent document 3).

  In addition, a water blocking wall (underground continuous wall) provided at a position deeper than the groundwater level at the bottom of the structure, a water flow opening provided in the water blocking wall, and a water blocking wall provided with a water flow opening There is known a technology related to a ground heat exchange system having a drain port provided in an opposing water stop wall (downstream of the groundwater flow) and a heat exchange means provided in a water permeable layer between the water stop walls. In this technique, a pipe is provided in a water permeable layer such as a gravel layer surrounded by a water blocking wall (see, for example, Patent Document 4).

JP 2003-262430 A Japanese Patent No. 3143619 JP 2006-010133 A JP 2008-275263 A

  However, the technique of Patent Document 1 has a problem that a construction cost (initial cost) for digging a deep hole and embedding a heat exchanger in the hole is expensive. The high construction cost is one of the factors hindering the spread of the heat pump system using geothermal heat, and if the construction cost can be reduced, the expectation of the spread expansion will increase. Moreover, although the technique of patent documents 2 and 3 is expected to reduce the construction cost, it cannot be applied to a building without a foundation pile, and both constructions are advanced simultaneously, so construction management becomes complicated. There was a problem. In particular, in the pile head, since the pile, the foundation frame, and the U-tube take-out physically interact with each other, the adjustment with the pile head foundation work is complicated. Furthermore, the technique of Patent Document 4 has a problem that it can be applied only to a place where there is a permeable layer, a flow of groundwater flow, or the like in the lower part of the building.

  Therefore, it can be applied to any structure, building, and installation location, and it is possible to shorten the construction period, reduce the construction cost, and to install the underground heat exchange pipe that can promote the spread of the geothermal heat pump system. Development of technology is desired.

The present invention has been conceived to solve such a conventional problem and achieves the following object.
The objective of this invention is providing the installation method of the underground heat exchange pipe in a structure which enables installation of a underground heat exchange pipe simultaneously with construction of the bottom face part of the concrete frame of a structure.

The present invention takes the following means in order to achieve the object.
The method of installing the underground heat exchange pipe in the structure of the present invention 1 is a circulation path in which a heat medium for exchanging heat with the underground circulates in a discarded concrete layer formed integrally with the bottom surface portion of the concrete frame of the structure. It is an installation method for installing an underground heat exchange pipe to form a ground, laying crushed stone on the ground and leveling, and placing concrete ready to mix at a predetermined ratio on the crushed stone And curing the predetermined time to solidify the ready-mixed concrete to form a first discarded concrete layer, and the underground heat exchange pipe formed in a predetermined shape above the first discarded concrete layer. The step of arranging at a predetermined position, the step of fixing the underground heat exchange pipe to the first discarded concrete layer with a fixing member, and the underground heat exchange pipe buried in the upper part of the first discarded concrete layer. A step of placing ready-mixed concrete mixed in a predetermined ratio, curing for a predetermined time, solidifying the ready-mixed concrete to form a second discarded concrete layer, and reinforcing bars on the second discarded concrete layer. And a step of constructing a structure and constructing the bottom portion of the concrete frame.

  The installation method of the underground heat exchange pipe in the structure according to the second aspect of the present invention is the method according to the first aspect of the present invention, wherein the underground heat exchange pipe is fixed by a fixing member, and then a wire mesh is placed on the underground heat exchange pipe. It has the process to perform.

  The installation method of the underground heat exchange pipe in the structure of the present invention 3 is a circulation path in which a heat medium for exchanging heat with the underground circulates in a discarded concrete layer formed integrally with the bottom surface portion of the concrete frame of the structure. An installation method for installing an underground heat exchange pipe for constructing a ground wire, a step of laying a mesh streak on a leveled ground, and the ground heat formed in a predetermined shape on the mesh streak A spacer member is disposed between the mesh reinforcement and the ground in order to dispose the exchange pipe at a predetermined position and fix the replacement pipe with a fixing member, and to disengage the mesh reinforcement from the ground surface by a predetermined height. And placing the ready-mixed concrete blended at a predetermined ratio so that the underground heat exchange pipe is buried in the upper part of the ground, curing for a predetermined time, solidifying and discarding the ready-mixed concrete Constructs forming a Nkurito layer, an upper reinforcing bars structure of the discarded concrete layer, characterized in that it has a step of constructing the bottom portion of the concrete skeleton.

  The method of installing the underground heat exchange pipe in the structure according to the present invention 4 is the method according to any one of the present inventions 1 to 3, wherein after the second discarded concrete layer or the discarded concrete layer is formed, the water on the ground side becomes the concrete. It has the process of providing the waterproof member for preventing leaking to the housing side in the said 2nd discarded concrete layer or the upper part of the said discarded concrete layer.

  The installation method of the underground heat exchange pipe in the structure of the fifth aspect of the present invention is the first to fourth aspects of the present invention, wherein the second discarded concrete layer and the ready-mixed concrete for forming the discarded concrete layer have a high thermal conductivity. It is a ready-mixed concrete containing aggregates.

  The installation method of the underground heat exchange pipe in the structure of the present invention 6 is the present invention 1 to 5, wherein the underground heat exchange pipe has a loop shape, a wave shape, a straight pipe shape, a U shape, and a spiral shape. It is a pipe made of synthetic resin selected from the above.

  The method of installing the underground heat exchange pipe in the structure of the present invention is to install the underground heat exchange pipe at the same time as the construction for placing the discarded concrete when constructing the bottom of the concrete frame. it can. Therefore, the construction period for installing the underground heat exchange pipe can be shortened and the construction cost can be reduced, which can greatly contribute to the spread of the heat pump apparatus using the underground heat. In addition, since the heat medium flow path formed by the underground heat exchange pipe can be installed in an arbitrary amount at an arbitrary position, the amount of heat can be easily adjusted.

  The ground heat heat pump device equipped with the underground heat exchange pipe installed by this installation method widely uses the heat exchanged with the underground in the underground heat exchange section formed at the bottom of the concrete frame as a heat source. It is possible to use natural energy, save energy, and provide an environment-friendly air conditioner, snow melting device, hot water supply device, and the like.

FIG. 1 is a conceptual diagram schematically showing the structure of a structure and a heat pump device using underground heat. FIG. 2 is a partial cross-sectional view showing the bottom of the concrete frame of the structure and the underground heat exchange pipe installed by the installation method of Embodiment 1 of the present invention. FIG. 3 is a plan view showing the underground heat exchange pipe. 4 is a cross-sectional view taken along line AA in FIG. FIG. 5 is a process diagram illustrating the installation method of the underground heat exchange pipe according to the first embodiment. FIG. 6 is a partial cross-sectional view showing the bottom of the concrete frame of the structure and the underground heat exchange pipe installed by the installation method of the second embodiment. FIG. 7 is a plan view showing the underground heat exchange pipe. FIG. 8 is a process diagram illustrating a method for installing the underground heat exchange pipe according to the second embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[Embodiment 1]
The installation method of the underground heat exchange pipe in the structure of Embodiment 1 is demonstrated. The first embodiment is suitable for soft ground and a large amount of groundwater, and considers workability, safety, and the like.
FIG. 1 is a conceptual diagram schematically showing the structure of a structure and a heat pump device using underground heat. FIG. 2 is a partial cross-sectional view showing the bottom of the concrete frame of the structure and the underground heat exchange pipe installed by the installation method of Embodiment 1 of the present invention, and FIG. 3 is a plan view showing the underground heat exchange pipe 4 is a cross-sectional view of FIG. 3 taken along line AA. FIG. 5 is a process diagram illustrating the installation method of the underground heat exchange pipe according to the first embodiment.

  An outline of a structure and a heat pump device using underground heat will be described with reference to FIG. The concrete frame CF of the structure B includes a ceiling part (not shown), a wall part CW, a bottom part CB, and the like (see FIG. 1). In this embodiment, the structure B is described as an example on the first basement floor, but it may be on a plurality of underground floors (for example, the fifth floor).

  The configurations of the underground heat exchanging portion 1 and the bottom portion CB of the concrete frame CF according to the first embodiment will be described with reference to FIGS. A first discarded concrete layer 2 and a second discarded concrete layer 3 are constructed below the bottom surface portion CB of the concrete frame CF. An underground heat exchange section 1 having an underground heat exchange pipe 10 is installed in the second discarded concrete layer 3. The heat pump 80 further forms a high-temperature or low-temperature heat medium using the underground heat collected (or radiated) by the underground heat exchanger 1 as a heat source. The energy of the heat medium is used in the heat load unit 81 as, for example, a snow melting device, a cooling / heating device, a hot water supply device, or the like. The heat pump 80 and the heat load unit 81 have a known configuration, and detailed description thereof is omitted. Discarded concrete is sometimes called level concrete or leveled concrete.

  The ground G is covered with crushed stone (not shown). As shown in FIG. 2, the first discarded concrete layer 2 having a predetermined thickness (for example, about 50 mm) is provided on the upper portion of the ground G. On the upper part of the ground G, ready-mixed concrete in which cement, aggregate, water, etc. are blended at a predetermined ratio is placed, cured for a predetermined time, and solidified to form a first discarded concrete layer 2. An underground heat exchange pipe 10 formed in a predetermined shape is disposed at a predetermined position above the first discarded concrete layer 2. The underground heat exchange pipe 10 is for constituting a part of a primary side circulation path through which a primary heat medium that exchanges heat with the underground circulates. The underground heat exchange pipe 10 of this form 1 has a loop shape in which a loop-shaped portion is formed so as to continue from one side to the other side while being displaced by a predetermined dimension (see FIG. 3). As shown in FIG. 4, the underground heat exchange pipe 10 is fixed to the first discarded concrete layer 2 with a fixing member including a pipe fixing tool (for example, a fixing band, a saddle band) 15, concrete nails 16, 16, and the like. Has been. The pipe fixture 15 and the concrete nail 16 constitute a fixing member, and as shown in FIG. 3, the underground heat exchange pipe 10 is fixed to the first discarded concrete layer 2 at a predetermined position. A wire mesh 12 having a predetermined mesh (for example, 100 mesh) is placed on the upper part of the underground heat exchange pipe 10. The wire mesh 12 is inserted as necessary to prevent the underground heat exchange pipe 10 from moving, and is unnecessary if the underground heat exchange pipe 10 does not move.

  A second discarded concrete layer 3 having a predetermined thickness (for example, 130 to 150 mm) is provided on the first discarded concrete layer 2. An underground heat exchange pipe 10, a wire mesh 12, and the like are embedded in the second discarded concrete layer 3. That is, from the upper side of the wire mesh 12, ready-mixed concrete in which cement, aggregate, water, etc. are blended at a predetermined ratio is placed, and this ready-mixed concrete passes between the wire mesh 12 and the underground heat exchange pipe 10. To the top of the first discarded concrete layer 2. By curing for a predetermined time, the ready-mixed concrete is solidified and the second discarded concrete layer 3 is formed. Note that the ready-mixed concrete for forming the first discarded concrete layer 2 and the second discarded concrete layer 3 may be a mixture of an aggregate having high thermal conductivity (for example, silica stone or quartz aggregate).

  A waterproof sheet 11 that is a waterproof member is laid on the upper part of the second discarded concrete layer 3. This waterproof sheet 11 is for preventing water from leaking from the ground G side to the concrete frame CF side. This waterproof sheet 11 is used as a building material and is provided as necessary. In other words, it is not necessary if water leakage can be prevented in other ways. The waterproof member may be a waterproof layer provided by applying a waterproof paint on the upper part of the second discarded concrete layer 3. A rebar structure 6 is constructed on the upper portion of the waterproof sheet 11, and ready-mixed concrete is cast and solidified to form the concrete layer 5 of the bottom surface portion CB. In this manner, the concrete frame CF including the bottom surface portion CB, the wall portion CW, the ceiling portion, and the like is sequentially constructed on the upper portion of the second discarded concrete layer 3.

[Installation Method of Embodiment 1]
The installation method of the underground heat exchange pipe in the structure of Embodiment 1 will be described with reference to FIG.
This construction method is an installation method in consideration of workability, safety, etc. when there is a lot of soft ground and groundwater. A crushed stone is spread on the soft ground (S21). On top of the leveled paving stone, ready-mixed concrete containing cement, aggregate, water, etc. is blended at a predetermined ratio. By curing and solidifying for a predetermined time, the first discarded concrete layer 2 is formed and a safe work site is secured (S22).

  The installation position of the underground heat exchange pipe 10 is set in the first discarded concrete layer 2. The underground heat exchange pipes 10 processed according to the designed shape are laid out according to the installation interval. The underground heat exchange pipe 10 is made of resin (for example, polyethylene), and can be joined by electrofusion or the like.

  The underground heat exchange pipe 10 is fixed to the first discarded concrete layer 2. That is, after engaging the underground heat exchange pipe 10 with the concave portion of the pipe fixture 15, concrete nails 16 for fixing both ends of the pipe fixture 15 are driven into the first discarded concrete layer 2 and fixed. The wire mesh 12 is placed on the upper part of the underground heat exchange pipe 10 (S23). This is to prevent the underground heat exchange pipe 10 from moving or floating due to the buoyancy of the ready-mixed concrete when the ready-mixed concrete is placed.

  The second concrete layer 3 is constructed by placing ready-mixed concrete containing cement, aggregate, water, etc. in a predetermined ratio and solidifying it by curing for a predetermined time. As a result, the underground heat exchange pipe 10 is embedded in the second discarded concrete layer 2 (S24). The waterproof sheet 11 is laid on the second discarded concrete layer 3 (S25). A pipe is connected to the end of the underground heat exchange pipe 10 for each unit. This pipe rises along a predetermined wall surface, and is then connected to the primary heat exchange part of the heat pump 80. The underground heat exchange pipe 10, piping, the primary heat exchange section of the heat pump 80, and the like constitute a primary side circulation path through which the primary side heat medium circulates.

  On the upper part of the second discarded concrete layer 3, a reinforcing bar structure 6 and a concrete form (not shown) are constructed sequentially from the bottom surface portion CB side. In this concrete formwork, ready-mixed concrete in which cement, aggregate, water and the like are blended at a predetermined ratio is placed and solidified by curing for a predetermined time to form the concrete layer 5 of the bottom surface portion CB. In this way, the concrete frames B such as the bottom surface portion CB, the wall portion CW, and the ceiling portion are sequentially constructed (S26).

[Embodiment 2]
The second embodiment is suitable for a stable ground, and the underground heat exchange pipe 10 can be safely installed on the ground. In the description of the second embodiment, the same reference numerals are given to the same members as those in the first embodiment, and detailed description thereof is omitted.
FIG. 6 is a partial cross-sectional view showing the bottom of the concrete frame and the underground heat exchange pipe of the concrete structure installed by the installation method of Embodiment 2, and FIG. 7 is a plan view showing the underground heat exchange pipe. is there. FIG. 8 is a process diagram illustrating a method for installing the underground heat exchange pipe according to the second embodiment.

  The configuration of the underground heat exchanging portion 1 and the bottom portion CB of the concrete frame CF according to the second embodiment will be described with reference to FIGS. As shown in FIG. 6, a discarded concrete layer 51 is constructed below the bottom surface portion CB of the concrete frame CF. In the discarded concrete layer 51, the underground heat exchange section 1 having the underground heat exchange pipe 10 is installed. The heat pump 80 further forms a high-temperature or low-temperature heat medium using the underground heat collected (or radiated) by the underground heat exchanger 1 as a heat source. The energy of the heat medium is used in the heat load unit 81 as, for example, a snow melting device, a cooling / heating device, a hot water supply device, or the like. The underground heat exchange pipe 10 is for constituting a part of a primary side circulation path through which a primary heat medium that exchanges heat with the underground circulates.

  As shown in FIG. 7, the underground heat exchange pipe 10 is bound and fixed by a binding member [for example, Insulok (trade name)] 54 and a fixing member such as a vinyl tie to the upper part of the mesh line 53. As shown in FIG. 6, spacer members 52 are arranged at predetermined intervals between the mesh streaks 53 to which the underground heat exchange pipe 10 is fixed and the ground G. The spacer member 52 is preferably a concrete block or the like. Accordingly, the mesh line 53 is installed at a position higher than the ground G by the height of the spacer member 52. In other words, a space having a predetermined height (for example, 30 to 50 mm) is formed between the ground G and the mesh line 53. A discarded concrete layer 51 having a predetermined thickness (for example, 130 to 150 mm) is provided on the ground G. The underground heat exchange pipe 10, the mesh reinforcement 53, and the like are embedded in the discarded concrete layer 51.

  That is, from the upper side of the underground heat exchange pipe 10 and the mesh streak 53, ready-mixed concrete containing cement, aggregate, water and the like is placed in a predetermined ratio. Passes between 52 and the like and reaches the upper part of the ground G. The discarded concrete layer 51 is formed by curing for a predetermined time and solidifying the ready-mixed concrete. The mesh reinforcement 53 is also a member for reinforcing the strength of the discarded concrete layer 51. The underground heat exchange pipe 10 of this form 2 is the same as the underground heat exchange pipe of the form 1. Note that the ready-mixed concrete for forming the discarded concrete layer 51 may be a mixture of an aggregate having a high thermal conductivity (for example, silica stone or quartz aggregate).

  A waterproof sheet 11, which is a waterproof member, is laid on the top of the discarded concrete layer 51. This waterproof sheet 11 is for preventing water from leaking from the ground G side to the concrete frame CF side. This waterproof sheet 11 is used as a building material and is provided as necessary. The waterproof member may be provided by applying a waterproof paint on the upper part of the discarded concrete layer 51. A rebar structure 6 is constructed on the top of this waterproof sheet 11, and ready-mixed concrete mixed with cement, aggregate, water, etc. in a predetermined ratio is placed and hardened to form a concrete layer 5 of the bottom surface portion CB. Is done. As described above, the concrete frame CF including the bottom surface portion CB, the wall portion CW, the ceiling portion, and the like is sequentially constructed on the upper portion of the discarded concrete layer 51.

[Installation Method of Embodiment 2]
A method for installing the underground heat exchange pipe in the structure of the second embodiment will be described with reference to FIG.
The installation method of this form 2 is an installation method suitable for a stable ground, and an operation of safely installing the underground heat exchange pipe 10 on the stable ground can be performed.
The installation position of the underground heat exchange pipe 10 is set in the upper part of the leveled ground G (S71).
The underground heat exchange pipes 10 processed according to the designed shape are laid out according to the installation interval. The underground heat exchange pipe 10 is made of resin (for example, polyethylene), and can be joined by electrofusion or the like.

  A mesh line 53 is laid at the set position of the set underground heat exchange pipe 10. The underground heat exchange pipes 10 processed according to the design shape are laid out on the mesh streaks 53 at every design interval, and the underground heat exchange pipes 10 are fixed to the mesh streaks 53 with the binding bands 54 (S72, 73). ). The spacer member 52 is sandwiched between the mesh line 53 and the ground G fixed integrally with the underground heat exchange pipe 10, and a space is provided between the mesh line 53 and the ground G (S74).

  The ready-mixed concrete in which cement, aggregate, water and the like are mixed at a predetermined ratio is placed, cured for a predetermined time, and solidified to form a discarded concrete layer 51. As a result, the underground heat exchange pipe 10 is discarded and embedded in the concrete layer 51 (S75). The waterproof sheet 11 is laid on top of the discarded concrete layer 51 (S76). A pipe is connected to the end of the underground heat exchange pipe 10 for each unit. This pipe rises along a predetermined wall surface, and is then connected to the primary heat exchange part of the heat pump 80. The underground heat exchange pipe 10, piping, the primary heat exchange section of the heat pump 80, and the like constitute a primary side circulation path through which the primary side heat medium circulates.

  On the upper part of the discarded concrete layer 51, a reinforcing bar structure 6 and a concrete form (not shown) are constructed in order from the bottom surface portion CB side. In this concrete formwork, ready-mixed concrete containing cement, aggregate, water, and the like in a predetermined ratio is placed, cured for a predetermined time, and solidified to form the concrete layer 5 of the bottom surface portion CB. In this way, the concrete frame CF such as the bottom surface portion CB, the wall portion CW, and the ceiling portion is sequentially constructed (S77).

  As mentioned above, although embodiment of this invention was described, this invention is not limited to this embodiment. Needless to say, changes can be made without departing from the scope and spirit of the present invention. For example, the underground heat exchange pipe may have other shapes such as a wave shape, a straight tube shape, and a U tube shape. Further, the underground heat exchange pipe has a spiral shape that is twisted at a predetermined diameter and a predetermined pitch, and the lead angle of the spiral tube portion is inclined at a predetermined angle with respect to the spiral axis. The shape may be a simple inclined spiral shape, a deformed spiral shape having an elliptical shape or an oval shape crushed in the vertical direction. The diameter of the underground heat exchange pipe can also be appropriately selected according to the place where the pipe is installed. In other words, the underground heat exchange pipe can be selected to have a desired size (for example, 13 to 30 mm). Moreover, the ground may have been improved.

DESCRIPTION OF SYMBOLS 1 ... Ground heat exchange part 2 ... 1st discarded concrete layer 3 ... 2nd discarded concrete layer 5 ... Concrete layer 6 ... Reinforcement 10 ... Underground heat exchange pipe 11 ... Waterproof sheet 12 ... Wire mesh 15 ... Pipe fixture 16 ... Concrete Nail 51 ... Discarded concrete layer 52 ... Spacer member 53 ... Mesh bar 54 ... Binding band B ... Structure CF ... Concrete frame CB ... Bottom part CW ... Wall part

Claims (6)

Installation method for installing underground heat exchange pipes to constitute a circulation path through which a heat medium for exchanging heat with the ground circulates in the discarded concrete layer formed integrally with the bottom surface of the concrete frame of the structure Because
Place crushed stone on the ground and level it, and put the ready-mixed concrete blended at a predetermined ratio on the crushed stone, cure it for a predetermined time, solidify the ready-mixed concrete, and form the first discarded concrete layer. Forming, and
A step of placing the underground heat exchange pipe formed in a predetermined shape at a predetermined position on the first discarded concrete layer;
Fixing the underground heat exchange pipe to the first discarded concrete layer with a fixing member;
On top of the first discarded concrete layer, ready-mixed concrete blended at a predetermined ratio is placed so that the underground heat exchange pipe is buried, and cured for a predetermined time to solidify the ready-mixed concrete. Forming a discarded concrete layer;
A method of installing a ground heat exchange pipe in a structure, comprising: constructing a reinforcing bar structure above the second discarded concrete layer and constructing the bottom surface of the concrete frame. In the installation method of the underground heat exchange pipe in the structure according to claim 1,
A method of installing a ground heat exchange pipe in a structure, comprising: fixing a ground heat exchange pipe with a fixing member; and placing a wire mesh on the ground heat exchange pipe. . Installation method for installing underground heat exchange pipes to constitute a circulation path through which a heat medium for exchanging heat with the ground circulates in the discarded concrete layer formed integrally with the bottom surface of the concrete frame of the structure Because
A process of laying mesh streaks on the even ground,
A step of arranging the underground heat exchange pipe formed in a predetermined shape in the mesh line at a predetermined position and fixing it by a fixing member;
A step of sandwiching a spacer member between the mesh line and the ground so that the mesh line is separated from the surface of the ground by a predetermined height;
In the upper part of the ground, ready-mixed concrete mixed in a predetermined ratio is placed so that the underground heat exchange pipe is buried, and cured for a predetermined time to solidify the ready-mixed concrete and form a discarded concrete layer. Process,
A method of installing a subsurface heat exchange pipe in a structure, comprising: constructing a reinforcing bar structure above the discarded concrete layer and constructing the bottom surface portion of the concrete frame. In the installation method of the underground heat exchange pipe in the structure as described in any one of Claim 1 to 3,
After forming the second discarded concrete layer or the discarded concrete layer, a waterproof member for preventing the water on the ground side from leaking out to the concrete frame side, the second discarded concrete layer, or A method of installing an underground heat exchange pipe in a structure, comprising the step of providing the upper portion of the discarded concrete layer. In the installation method of the underground heat exchange pipe in the structure as described in any one of Claim 1 to 4,
The second abandoned concrete layer and the ready-mixed concrete for forming the abandoned concrete layer are ready-mixed concrete mixed with aggregate having high thermal conductivity. Installation method. In the installation method of the underground heat exchange pipe in the structure as described in any one of Claim 1 to 5,
The underground heat exchange pipe is a synthetic resin pipe selected from a loop shape, a wave shape, a straight pipe shape, a U-shape, and a spiral shape. Installation method.

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