JP4163042B2 - Installation mechanism of heat exchange piping in heat exchange system using building foundation piles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heat exchange piping installation mechanism in a system for exchanging heat with the ground using a foundation pile of a building.
[0002]
[Prior art]
Conventionally, the underground temperature, which is substantially constant throughout the year compared to the outside air temperature, has been used as a heat source for air conditioning. That is, the underground temperature depends on the depth, but at a depth of 10 m or more, it is maintained at about 15 ° C. throughout the year. Thus, the relatively deep underground temperature is used as a heat source for air conditioning. As one of the systems intended to be used as a system, a system has been proposed in which a heat exchange pipe for flowing a heat medium such as water is installed inside a foundation pile of a building to perform heat exchange.
[0003]
For example, in the one described in JP-A-60-8659, a U-shaped heat exchanging pipe is inserted into a concentric hole of a factory-produced concrete pile whose lower end is closed, and this heat exchanging pipe is inserted into the pipe. The heat medium is circulated, and concentric holes in the concrete pile and the heat exchange pipe are filled with a material having good heat transfer.
[0004]
This conventional document completely discloses a specific support mechanism for supporting a heat exchange pipe inserted into a hole of a factory-produced concrete pile and a specific example of a material having good heat transfer for filling a hole of a concrete pile. Not.
[0005]
[Problems to be solved by the invention]
In the present invention, first, instead of using such a factory-produced concrete pile as described in the conventional literature, a cast-in-place foundation pile is used, so that the heat exchange piping to the inside of the pile is replaced. The purpose is to facilitate installation.
[0006]
By the way, as a method usually considered when installing a heat exchange pipe in a cast-in-place foundation pile, for example, as shown in FIG. A heat exchanging pipe d is arranged between the main bar c and the main bar c so as to be inscribed in the bar b, and the pipe is fixed concentrically inside the main reinforcing bar cage. For example, there is a method of arranging a small-diameter rebar cage for use and attaching a heat exchange pipe to the small-diameter rebar cage. In FIG. 4, the symbol e indicates a drilling hole.
[0007]
However, in the former method, since the distance between the main bar c and the pipe d is narrow, there is a concern that the concrete does not sufficiently flow into this portion, resulting in poor filling. In the latter method, a double rebar cage is used, which increases costs for both materials and artificial hands.
Accordingly, the present invention aims to solve such problems.
[0008]
[Means for Solving the Problems]
In order to solve the above-described problems, in the present invention, in order to construct a cast-in-place foundation pile in a system in which heat exchange pipes are installed in the foundation pile of a building to perform heat exchange with the underground. In a plurality of locations of the rebar cage at intervals in the length direction, support rebars are arranged between multiple pairs of opposing main bars, and the intersection of the plurality of support rebars is used as a support part for heat exchange piping Proposing an installation mechanism for heat exchange piping in a heat exchange system using foundation piles in a building that is configured to insert a tremey pipe through a central space surrounded by a plurality of supporting reinforcing bars .
[0009]
According to the present invention, in the above configuration, it is proposed that the supporting reinforcing bars are arranged in a polygonal shape around a plurality of sets of main bars, with three or more main bars as one set.
[0010]
According to the present invention, the heat exchange pipe is supported between the main reinforcing bars in the intersection of the reinforcing bars arranged between the opposing main bars of the reinforcing bar cage for constructing the foundation pile. It is possible to secure the space necessary for filling the concrete and the space through which the tremy tube is inserted, and the supporting rebar should be arranged at a place spaced in the length direction of the rebar cage. Costs are significantly reduced compared to those using double rebar cages.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a longitudinal sectional view schematically showing an installation mechanism of the present invention. Reference numeral 1 is a drilling hole, 2 is a reinforcing steel cage for constructing a foundation pile (concrete pile) by cast-in-place. This shows the state In addition, as a construction method for constructing a cast-in-place foundation pile, an appropriate construction method such as an earth drill method, a reverse circulation method, or an all casing method can be applied.
[0012]
The rebar cage 2 has a configuration in which a number of hoop bars 4 are arranged around a number of main bars 3 in the length direction as in the conventional case. In FIG. The illustration is omitted except for only two lines, and the hoop line 4 is virtually indicated by a two-dot chain line.
[0013]
In the present invention, support bars 5 are arranged between a plurality of opposing main bars 3 at a plurality of positions spaced in the longitudinal direction of the rebar cage 2, and intersecting portions 6 of the plurality of support bars 5. The heat exchanging pipe 7 is supported as a support portion, and the tremy tube 9 is inserted through the central space portion 8 surrounded by the plurality of supporting reinforcing bars 5.
[0014]
The distance between the reinforcing bars 2 in the longitudinal direction in which the reinforcing bars 5 are provided can be, for example, every several meters. For example, the reinforcing bar 2 shown in FIG. It is provided at 4 locations every 5m. As long as the supporting reinforcing bars 5 are arranged between a plurality of opposing main reinforcing bars 3 and a space 8 into which the tremy tube 9 can be inserted is formed while the intersecting portion 6 is formed, specific reinforcing bars are arranged. The specific form is described below with reference to FIGS. 2 and 3. FIG.
[0015]
FIG. 2 shows a first form of specific reinforcement of the supporting reinforcing bars 5. In this embodiment, the supporting reinforcing bars 5 include four main reinforcing bars 3 as one set, and three sets a, b, c. The bar is arranged around the main bar 3 in a rectangular shape. Reinforcing bars for each set a, b, c are represented as supporting bars 5a, 5b, 5c, respectively, and a space 8 is formed on the center side of the reinforcing bar 2.
[0016]
Next, FIG. 3 shows a second form of specific reinforcement of the supporting reinforcing bar 5. In this form, the supporting reinforcing bar 5 includes a set of four main reinforcing bars 3 as in the first form. However, the bars are arranged in a rectangular shape around the main bars 3 of the two sets a and b. Reinforcing bars for the respective sets a and b are represented as supporting bars 5a and 5b, respectively, and a space 8 is formed on the center side of the reinforcing bar 2.
[0017]
As described above, the supporting reinforcing bars 5 may be arranged in a polygonal shape around a plurality of sets of main reinforcing bars 3 including three or more main reinforcing bars 3 including the first and second forms described above. it can.
[0018]
In this way, by supporting the heat exchange pipes 7 at the eight portions of the intersection 6 formed by these supporting reinforcing bars 5a, 5b, 5c, these eight heat exchange pipes 7 are separated from the main bar 3. Can be installed at different positions. These eight heat exchanging pipes 7 form a pair, and these four pairs of heat exchanging pipes 7 are respectively connected at the lower part as shown in FIG. Yes. The same applies to the first embodiment, but the method of supporting the heat exchange pipe 7 at the intersection 6 may be a method of using a band or a clamp or supporting by heat welding.
[0019]
After the rebar cage 3 supporting the heat exchanging pipe 7 is built in the excavation hole 1 as described above, the tremy tube 9 is suspended from above, and the lower end of the rebar cage 9 is located at each support rebar 5 location. The space portion 8 is inserted to reach the bottom of the excavation hole 1 and the concrete 10 is placed while moving upward.
[0020]
As described above, the heat exchanging pipe 7 is supported by the intersecting portions 6 of the plurality of supporting reinforcing bars 5 arranged between the opposing main reinforcing bars 3 of the reinforcing bar 2, and therefore, the concrete is interposed between the main reinforcing bars 3. An interval necessary for filling the concrete 10 is ensured, and satisfactory filling of the concrete 10 can be performed.
[0021]
In this way, it is possible to easily and inexpensively construct a foundation pile of a building in which a heat exchange pipe 7 for flowing a heat medium such as water is provided to perform heat exchange without causing defective filling. it can.
[0022]
【The invention's effect】
As described above, in the system in which the heat exchange pipe is installed in the foundation pile of the building and performs heat exchange with the ground as described above, the heat exchange pipe is a rebar cage for constructing the foundation pile. To support at the intersection of a plurality of reinforcing bars arranged between the main bars facing each other, it is possible to secure a space necessary for good concrete filling between the main bars and a space part through which the tremy pipe is inserted. Therefore, it is possible to prevent the occurrence of poor filling of the concrete, and the supporting reinforcing bars only need to be arranged at intervals in the longitudinal direction of the reinforcing bar cage, so a double reinforcing bar cage is used. There is an effect that the cost is greatly reduced as compared with the above.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view schematically showing an installation mechanism of the present invention.
FIG. 2 is a cross-sectional view showing a first form of reinforcing bar reinforcement.
FIG. 3 is a cross-sectional view showing a second form of the reinforcing bar reinforcement.
FIG. 4 is a cross-sectional view showing an example of a support form of a heat exchange pipe to a reinforcing steel cage when a conventional technique is used.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Excavation hole 2 Reinforcing bar cage 3 Main bar 4 Hoop bar 5 Supporting bar 6 Crossing (supporting part)
7 Heat exchange piping 8 Space 9 Tremy tube 10 Concrete

Claims (2)

In a system in which heat exchange piping is installed in the foundation pile of the building to exchange heat with the ground, the length of the rebar cage for constructing the cast-in-place foundation pile is spaced in the length direction. In several places, support reinforcing bars are arranged between a plurality of opposing main reinforcing bars, and the heat exchange pipes are supported by using the intersections of the plurality of supporting reinforcing bars as support parts, and are surrounded by the plurality of supporting reinforcing bars. Of heat exchange piping in a heat exchange system using foundation piles of a building, characterized in that the tremely pipe is inserted through a central space. 2. The heat exchange system using a building foundation pile according to claim 1, wherein the supporting reinforcing bars are arranged in a polygonal shape around a plurality of sets of main bars, with three or more main bars as one set. Installation mechanism of heat exchange pipes

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