JP2007002425A - Reinforced concrete foundation, template mount and method for constructing reinforced concrete foundation - Google Patents

Abstract

The present invention provides a reinforced concrete foundation, a template mount, and a reinforced concrete foundation construction method capable of omitting the removal work after placing concrete and shortening the construction period of the machine work.
In a reinforced concrete foundation on which a mechanical device is installed, a concrete 1 as a main material, a reinforcing bar 2 arranged in the concrete 1 to develop a required strength, and a concrete 1 so as to protrude from a finished concrete foundation outer shape 1A. A fixed anchor bolt 3 for installation of a mechanical device and a hole for inserting the anchor bolt 3 to determine the fixing position of the anchor bolt 3, which is located inside the concrete foundation finished outer shape 1A. 2 and a template 4 embedded in the concrete 1.
[Selection] Figure 4

Description

  The present invention relates to a reinforced concrete foundation on which a mechanical device is installed, a template frame, and a method for constructing a reinforced concrete foundation.

  When installing an anchor bolt for fixing a mechanical device such as a plant on a reinforced concrete foundation, a template base is generally used to place the anchor bolt at a designed position. Usually, the template mount is composed of a column projecting from the inside of the completed outer shape of the reinforced concrete foundation and a template fixed to the column. At the time of construction, anchor bolts are passed through holes drilled in the template at a desired pitch, and concrete is placed in a state where the anchor bolts are suspended and fixed to the template. After that, when the concrete hardens, a reinforced concrete foundation in which anchor bolts are arranged at predetermined positions is formed.

JP 2002-339374 A

  However, since the conventional template mount protrudes outside the concrete foundation completed outline except for a part of the column, the protruding portion of the column, the template and the like must be finally removed. Since such removal work is started after the concrete is hardened, the template cannot be removed during the concrete curing period (several days to one week or more), and the schedule of the installation work of the mechanical device is greatly restricted.

  The objective of this invention is providing the construction method of the reinforced concrete foundation, template mount, and reinforced concrete foundation which can omit the removal operation | work after concrete placement and can shorten the construction period of the installation operation | work of a mechanical apparatus.

  (1) In order to achieve the above object, the present invention is a reinforced concrete foundation on which a mechanical device is installed, and a concrete as a main material, a reinforcing bar arranged in the concrete to express a required strength, and a protruding from a finished outer shape. An anchor bolt for installing the machine device fixed to the concrete and a hole through which the anchor bolt is inserted to determine the fixing position of the anchor bolt, so that the anchor bolt is positioned inside the finished outer shape. A template embedded in the concrete is provided together with the reinforcing bar.

  (2) In the above (1), preferably, the template is incorporated in the array of reinforcing bars so as to form a structural material for expressing required strength together with the reinforcing bars.

  (3) In the above (1), preferably, the template is a shape steel.

  (4) In the above (1), preferably, the template is incorporated in the reinforcing bar array so as to form a structural material for expressing the required strength together with the reinforcing bar, and the structure including the template has the required strength. It is comprised so that it may have.

  (5) In order to achieve the above-mentioned object, the present invention is also based on a reinforced concrete foundation for installing a mechanical device, concrete as a main material, reinforcing bars arranged in the concrete to express required strength, and a completed outer shape. An anchor bolt for installing a mechanical device fixed to the concrete so as to protrude, and a hole for inserting the anchor bolt to determine the fixing position of the anchor bolt, which is positioned inside the finished outer shape And a template embedded in the concrete together with the reinforcing bar, and a support for supporting the template, and a support column embedded in the concrete so that a tip portion does not protrude outside a completed outer shape. To do.

  (6) In order to achieve the above-mentioned object, the present invention is also provided for installing a mechanical device on a reinforced concrete foundation provided with concrete as a main material and reinforcing bars arranged in the concrete to develop required strength. A template base used for installing an anchor bolt at a required position has a hole through which the anchor bolt is inserted and determines a fixing position of the anchor bolt, and is located inside a completed outline of the reinforced concrete foundation. As described above, a template disposed together with the reinforcing bars is provided.

  (7) In order to achieve the above object, and in the present invention, in a method for constructing a reinforced concrete foundation on which a mechanical device is installed, a template is disposed so as to be positioned inside a completed outer shape, and a hole formed in the template is provided. Insert anchor bolts for machine equipment installation, determine the fixing position of the anchor bolts, place concrete and embed the template in the concrete together with reinforcing bars, and when the concrete is placed, only the anchor bolts are completed. It is characterized in that it is configured to protrude to the outside.

  According to the present invention, since the template base for anchor bolt fixing is completely embedded in the concrete foundation frame, it is not necessary to remove the template base after placing the concrete, and the installation work of the mechanical device can be performed by omitting the removal work. The construction period can be shortened.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view showing an external configuration of an example of plant equipment using a reinforced concrete foundation of the present invention.
FIG. 1 illustrates a power generation turbine plant (combined cycle). In this power generation turbine plant, air sucked from the intake chamber 20 is introduced into the gas turbine 30 via the intake duct 25. Although not specifically shown, in the gas turbine 30, the shaft of the turbine is compressed by high-temperature and high-pressure combustion gas generated by compressing the intake air from the intake duct 25 by a compressor and burning the compressed air together with fuel in the combustor. It is designed to gain power. The combustion gas (exhaust gas) after working in the turbine is guided to the exhaust heat recovery boiler 40 via the exhaust duct 35, and the thermal energy of the exhaust gas is recovered. The thermal energy recovered by the exhaust heat recovery boiler 40 is used for steam generation, and the steam generated here is supplied to the steam turbine 45 and performs expansion work to give the steam turbine 45 shaft power. The shaft power of the steam turbine 45 is transmitted to the generator 50 and converted into electric energy. The steam (exhaust gas) that has worked in the steam turbine 45 is returned to water by the condenser 55 and supplied to the exhaust heat recovery boiler 40 again. Reference numeral 60 denotes an activation device used when the plant is activated.

  In a power plant using such a steam turbine, the exhaust from the steam turbine is guided to a condenser, and the condenser is generally connected to the lower part of an exhaust chamber provided at the exhaust outlet of the steam turbine. . In the turbine plant of FIG. 1, the condenser 55 is provided below the steam turbine 45, and the steam turbine 45 is installed on the upper part of the foundation gantry 65 together with the generator 50 and the starter 60 that are connected coaxially. .

FIG. 2 is a perspective view showing an example of the structure of such a foundation frame.
2 is a stilt structure of a reinforced concrete ramen structure in which a reinforced concrete foundation 75 is supported by legs 70. The reinforced concrete foundation 75 is used to install a mechanical device. For example, when a steam turbine is installed as a mechanical device, the steam turbine is supported by the reinforced concrete foundation 75 through the central opening 76 so that the lower half faces the downstairs, and the reinforced concrete foundation 75 is installed. Connected to a condenser installed below. The steam turbine is firmly fixed to the reinforced concrete foundation 75 by anchor bolts 77 in which flanges provided in the casing are planted on the reinforced concrete foundation 75.

  As shown in the example of FIG. 2, it is necessary to plant anchor bolts for fixing the mechanical device in accordance with the pitch of the bolt insertion holes provided on the flange of the mechanical device, etc., on the reinforced concrete foundation on which the mechanical device is installed. There is. The present invention is characterized by the installation structure of the anchor bolt with respect to the concrete foundation. Reinforced concrete foundations have various shapes and are designed according to the shape of the mechanical device fixed to the top. As shown in the figure, for example, the foundation for installing a large turbine for power generation has a gantry shape, and is generally a concrete structure having a ramen structure composed of beams and columns.

FIG. 3 is a partial perspective view showing the internal configuration of the reinforced concrete foundation according to the embodiment of the present invention, and FIG. 4 is a perspective view seen from the direction A in FIG.
As shown in FIGS. 3 and 4, the reinforced concrete foundation of the present invention includes a concrete 1 as a main material, a reinforcing bar 2 arranged in the concrete 1 to express a required strength, and a completed reinforced concrete foundation outline 1A (illustrated by a dotted line). Anchor bolt 3 for installation of a mechanical device that is planted and fixed in concrete 1 so that the tip protrudes from the end, and a template (receiving bracket) 4 that has a hole through which anchor bolt 3 is inserted and determines the fixing position of anchor bolt 3 It has.

  In general, deformed reinforcing bars are used for the reinforcing bars 2, and the number, diameter, interval and arrangement shape are determined according to the structural calculation, and the reinforcing bars are arranged in the frame of the reinforced concrete foundation. Usually, the reinforcing bars 2 are arranged in a lattice shape inside a distance called a fog from the surface of the finished outer shape 1A of the concrete foundation to form a bowl shape.

  The template 4 constitutes an embedded template frame for anchor bolt fixation together with the template support 5 and the template beam 6. The template beam 6 is incorporated in the reinforcing bar array so as to form a structural material for expressing the required strength together with the reinforcing bar 2, and the structure including the template beam 6 is configured to have the required strength. . That is, by providing the template beam 6 instead of a part of the reinforcing bar 2, the template beam 6 can be considered in the structural calculation.

  The template support 5 supports the template beam 6 and the template 4 and is made of a steel material such as H-shaped steel. For example, the template support 5 is fixed to a base plate set on a concrete foundation or the like on which the foundation frame is installed, or is attached to the bottom of the concrete foundation. Is fixed by being embedded. When the concrete placement of the foundation frame is performed in several times, the bottom portion of the template column 5 can be buried at the time of concrete placement immediately before the concrete placement in which the anchor bolt is embedded. The template beam 6 is fixed to a predetermined height by welding or bolting to the template column 5 thus fixed. The template support 5 is arranged so that the tip portion does not protrude outside the finished outer shape 1A, and is designed to be embedded in the concrete foundation frame as a part of the anchor bolt fixing embedded template.

  The template beam 6 is made of a steel material such as H-shaped steel, and is fixed to the template support 5 by welding or bolting in a horizontal posture. The template beam 6 fixes the anchor bolt 3 at a predetermined position together with the template 4 fixed to the template beam 6 by welding or bolting. When this template beam 6 is made of, for example, H-shaped steel so that it can be taken into consideration in structural calculation, the upper web portion of the H-shaped steel is regarded as a structural member, and the distance from the neutral axis of the concrete foundation 10 is defined as the neutral axis and the reinforcing bar 2 In order to contribute to the structural strength by arranging it so as to be substantially the same distance as the distance between the two, the strength characteristic of the entire H-shaped steel is expected in the structural calculation and replaced with a part of the reinforcing bar 2. In any strength calculation, the template beam 6 is designed to be completely embedded in the concrete foundation frame together with the template support 5.

  The template 4 is made of a shape steel such as an L-shaped steel (an angle steel), and is fixed to the template beam 6 in a substantially horizontal posture by welding or bolting. Of course, other shape steels such as H-shaped steel and I-shaped steel may be used. The template 4 has a hole through which the anchor bolt 3 is passed so that the anchor bolt 3 can be set at an accurate position as designed. The template 4 is also embedded in the concrete 1 together with the reinforcing bar 2 so as to be positioned inside the finished reinforced concrete foundation outer shape 1 </ b> A, and is embedded in the frame of the reinforced concrete foundation together with the template beam 6 and the template support 5.

  The anchor bolt 3 is inserted into a hole formed in the template 4, and is thereby set at a designed position that matches the position of the bolting on the machine device side to be installed, and is fixed to the template 4 by welding or screwing. Such a pre-embedded anchor bolt 3 is fixed by an adhesive force with the foundation concrete to be placed later. The upper part of the anchor bolt 3 is threaded, and the machine device is positioned at a position determined by the anchor bolt 3 by tightening a nut to the threaded portion of the anchor bolt 3 while the anchor bolt 3 is passed through the machine device. Is fixed. A curing period of several days to one week or more is required until the concrete of the reinforced concrete foundation is hardened after completion of pouring, although it depends on conditions such as temperature and concrete characteristics.

The reinforced concrete foundation with the above configuration is constructed by the following construction procedure.
In order to construct a reinforced concrete foundation as shown in FIG. 3, first, reinforcing bars 2 are arranged in order from the bottom surface side of the completed reinforced concrete foundation outline 1A. The template support 5 is designed and processed so that the upper end fits in the frame of the reinforced concrete foundation. For example, the bottom is embedded and fixed in advance. When the template support 5 is erected, the template beam 6 is horizontally attached to the template support 5 by welding, bolting or the like, and the template 4 is also fixed to the template beam 6 by welding or bolting or the like. Alternatively, the template 4 may be attached to the template beam 6 in advance, and then the template beam 6 may be fixed to the template column 5. At this time, the template beam 6 is arranged so as to be incorporated into the array of the reinforcing bars 2 by placing a cover from the reinforced concrete completed outer shape 1A.

  After the template 4 is fixed, the anchor bolt 3 is set next. The anchor bolt 3 is passed through the hole formed in the template 4, and the anchor bolt 3 is fixed in a posture in which the screw portion at the upper end protrudes from the finished outer shape 1A of the reinforced concrete foundation. When the anchor bolt 3 is fixed, the reinforcing bars 2 to be arranged in the portion other than the bottom in the housing are arranged. When the anchor bolt 3 is fixed in this manner, a conduit or the like embedded in another foundation frame is set as necessary, and the concrete 1 is placed. After the concrete 1 is placed, it is cured for several days to one week or more in order to develop the strength of the concrete 1.

Here, FIG. 5 is a perspective view showing the configuration of a template mount used for a general reinforced concrete foundation, and FIG. 6 is a perspective view seen from the direction B in FIG.
As shown in FIGS. 5 and 6, the upper end of the template support 5 generally protrudes from the reinforced concrete foundation outline 1 </ b> A, and the template beam 6 ′ and the template 4 ′ are attached to the protruding portion of the template support 5. Then, the concrete 1 is placed with the anchor bolt 3 suspended and fixed through the hole formed in the template 4 ', and after the concrete is hardened, the template support 5' outside the concrete foundation finished shape is cut and attached to this. The anchor bolt 3 is set to the concrete foundation by removing together with the template beam 6 'and the template 4'.

  A steel frame is used for the template beam 6 'and is attached to the template support 5' by welding or bolting. The size and shape of the steel frame is determined so that the anchor bolt 3 does not move from the design fixed position due to the influence of the flow force of the concrete when placing the concrete 1 and the shrinkage force when hardening the concrete, and the accuracy is not lost. Yes. As for the structural reinforcing bar 2, the shape, diameter and quantity of the reinforcing bar are determined by the basic structural calculation. However, since the anchor bolt 3, the template 4 ', the template support 5', and the template beam 6 'are removed after construction when performing the reinforcing work of the structural reinforcing bars, they are not considered in the reinforcing bar shape at the time of structural calculation. Moreover, since the number of the reinforcing bars 2 is determined by the structural calculation, it cannot be reduced. Therefore, when the rebar 2 overlaps with the arrangement of other members, the arrangement of the anchor bolt is prioritized, so the rebar 2 is shifted and placed, and the rebar 2 is displaced with priority given to the arrangement of the anchor bolt 3. There is a tendency that rebars are densely gathered (see FIG. 6 and the like). As a result, the workability of setting the reinforcing bars or the anchor bolts 3 may be significantly reduced, or the gap between the members may be narrowed when placing the concrete, making it difficult to fill the concrete.

  Furthermore, since the template removal work is started after the concrete is hardened, the template cannot be removed for several days to one week or more as a concrete curing period, and the installation work schedule of the mechanical device is greatly restricted.

  On the other hand, in this embodiment, since the template base for anchor bolt fixation is all embedded in the reinforced concrete foundation frame, the removal work of the template and the like can be omitted. As a result, the machine can be installed immediately after the concrete curing period elapses, and the construction period can be greatly shortened. Further, since the template mount also serves as a structural material, the relative position between the template 1 and the reinforcing bar 2 can be easily grasped on the drawing, and it is easy to consider the work procedure.

  Of course, since the template base for fixing anchor bolts also serves as a structural material, the amount of the reinforcing bar 2 can be reduced, and interference between the template base and the reinforcing bar 2 can be easily avoided, and the density of the reinforcing bars 2 can be reduced. . Therefore, the workability of the reinforcing bar 2 and the setting work of the anchor base for fixing the anchor bolt is improved. Moreover, since the location where the rebar 2 is dense decreases, it is easy to uniformly fill the concrete when placing the concrete.

It is a perspective view showing the appearance composition of an example of the plant equipment using the reinforced concrete foundation of the present invention. It is a perspective view showing the example of 1 composition of the foundation stand using the reinforced concrete foundation of the present invention. It is a fragmentary perspective view showing the internal structure of the reinforced concrete foundation which concerns on one embodiment of this invention. It is the perspective view seen from the A direction in FIG. It is a perspective view showing the structure of the template mount used for a general reinforced concrete foundation. It is the perspective view seen from the B direction in FIG.

Explanation of symbols

1 Concrete 1A Concrete foundation completed outline 2 Reinforcement 3 Anchor bolt 4 Template 5 Template support 6 Template beam

Claims (7)

In the reinforced concrete foundation where the machinery is installed,
Concrete as the main material,
Rebars arranged in the concrete to develop the required strength;
Anchor bolts for installing the mechanical device fixed to the concrete so as to protrude from the finished outer shape,
It has a hole through which the anchor bolt is inserted, and determines the fixing position of the anchor bolt, and includes a template embedded in the concrete together with the reinforcing bar so as to be positioned inside a completed outer shape. Reinforced concrete foundation.   2. The reinforced concrete foundation according to claim 1, wherein the template is incorporated in the reinforcing bar array so as to form a structural material for expressing required strength together with the reinforcing bar.   2. The reinforced concrete foundation according to claim 1, wherein the template is a shape steel.   The reinforced concrete foundation according to claim 1, wherein the template is incorporated in the reinforcing bar arrangement so as to form a structural material for expressing the required strength together with the reinforcing bar, and the structure including the template has the required strength. Reinforced concrete foundation characterized by being constructed. In the reinforced concrete foundation where the machinery is installed,
Concrete as the main material,
Rebars arranged in the concrete to develop the required strength;
Anchor bolts for installing the mechanical device fixed to the concrete so as to protrude from the finished outer shape,
It has a hole through which this anchor bolt is inserted, determines the fixing position of the anchor bolt, and is a template embedded in the concrete together with the reinforcing bar so as to be positioned inside the completed outer shape,
A reinforced concrete foundation, which supports the template, and includes a column embedded in the concrete so that a tip portion does not protrude outside a completed outer shape. In a template base used to install anchor bolts for installing a mechanical device at a required position on a reinforced concrete foundation having concrete as a main material and reinforcing bars arranged in the concrete to express the required strength,
It has a hole for inserting the anchor bolt and determines a fixing position of the anchor bolt, and includes a template disposed with the reinforcing bar so as to be positioned inside a completed outer shape of the reinforced concrete foundation. A template mount. In the construction method of the reinforced concrete foundation to install the mechanical device,
Arrange the template so that it is located inside the completed outline,
Insert anchor bolts for machine installation into the holes opened in the template to determine the fixing position of the anchor bolts,
A method for constructing a reinforced concrete foundation, wherein concrete is cast and the template is embedded in the concrete together with a reinforcing bar, and only the anchor bolt protrudes outside the finished outer shape when the concrete is placed.

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