JP6424058B2 - Construction method of equipment foundation - Google Patents

Description

  The present invention relates to a method for constructing a foundation for equipment used for installing various equipment such as a cooling tower, a pump, a compressor, a water receiving tank, and a cubicle (high voltage power receiving equipment).

  As this type of equipment foundation, as shown in Patent Document 1, it was joined to a top surface of a precast concrete foundation member joined in a mounted state on a concrete slab in a state where the height of a steel base was adjusted. Things are known.

The device foundation described in Patent Document 1 is constructed by the following construction method.
An anchor bolt for fixing the gantry is projected on the concrete slab with a projecting dimension larger than the height dimension of the foundation member, and a vertical hole portion through which the anchor bolt can be inserted is formed through the foundation member. Then, after placing the foundation member in a state in which the anchor bolt is inserted into the vertical hole portion, a pair of upper and lower portions is adjusted in a state where the height of the frame is adjusted with respect to the anchor bolt portion exposed from the vertical hole portion on the upper surface side of the foundation member Then, a grout material (an example of a curable filler) is filled and cured in a state where the lower nut is embedded in the vertical hole.

JP 2006-257680 A

  In the above-mentioned conventional technology, when constructing a foundation for equipment, since two members of a steel base and a precast concrete base member are handled simultaneously as a relatively large and heavy heavy member, the work on site is complicated. There are difficult inconveniences.

  In addition, since the main work on site cannot be started until the two members of the steel base and the precast concrete foundation member are ready, the construction of the foundation for equipment is completed after the construction of the concrete slab is completed. Inconveniences that can result in prolonged periods can also occur.

  In particular, if the equipment stand is configured as a dedicated product for the applicable equipment (and specifications), the final equipment selection has been completed. Even if the construction of the concrete slab is completed, the main work cannot be started. Therefore, if the final decision on the equipment is delayed, the construction of the foundation for the equipment may be greatly delayed, and the entire construction period may be prolonged.

  In view of this situation, a main problem of the present invention is to provide a device foundation construction method capable of easily and quickly constructing a device foundation whose top level is adjusted.

The machine dexterity basis with constituting the basis member made precast concrete,
The foundation member and the concrete slab may be joined in a state where the posture of the foundation member is adjusted on the concrete slab and the top end level of the foundation member is set to a predetermined level .

  According to the said structure, since the foundation for equipment is comprised with the foundation member made from precast concrete, a construction cost reduction and a construction period shortening can be aimed at compared with the case where an equipment foundation is comprised with a cast-in-place concrete.

  And since the main components of equipment foundations are only precast concrete foundation members, if the foundation members are brought into the site where the concrete slab is built, the main work can be started without waiting for other members to be brought in. it can. Therefore, the foundation for equipment can be finished in a short period of time from the completion of construction of the concrete slab.

  Moreover, in the construction work of equipment foundations adjusted at the top level, it is only necessary to handle the foundation member as a heavy member, ensuring higher workability compared to handling multiple heavy members in this construction work. can do.

  Therefore, it is possible to easily and quickly construct the equipment foundation with the top level adjusted on the concrete slab.

To the attitude of the previous Symbol foundation member to adjust on a concrete slab,
A downwardly pressed surface is integrally formed on the outer peripheral portion of the base member,
You may press the said to-be-pressed surface from the downward direction by a press means by making the upper surface of the said concrete slab into a reaction force fulcrum .

  According to the above configuration, since the pressed surface for pressing with the pressing means is integrally formed in advance on the outer peripheral portion of the base member made of precast concrete, for example, the member having the pressed surface on the upper surface of the base member is provided. Compared to mounting separately, the work man-hours at the site for adjusting the attitude of the foundation member can be reduced.

  Furthermore, since the pressed surface is integrally formed with the base member as described above, the base member can be directly pressed from below by the pressing means without using another member, so that the attitude of the base member can be adjusted. Can be performed with high accuracy, and the top level of the foundation member can be set to a predetermined level with high accuracy.

[1] The first characteristic configuration of the present invention is that the foundation for equipment is composed of a foundation member made of precast concrete,
In the construction method of the foundation for equipment in which the foundation member and the concrete slab are joined in a state where the posture of the foundation member is adjusted on the concrete slab and the top end level of the foundation member is set to a predetermined level.
To adjust the attitude of the foundation member on the concrete slab,
A downwardly pressed surface is integrally formed on the outer peripheral portion of the base member,
The pressed surface is constituted by a lower surface of a bowl-shaped portion integrally formed in a form protruding outward on the upper side of the outer peripheral portion of the foundation member,
The upper surface of the concrete slab is used as a reaction force fulcrum to press the pressed surface from below with pressing means.
[2] The second feature of the present invention is that, in order to adjust the attitude of the foundation member on the concrete slab, a pressing tool as the pressing means is interposed between the lower surface of the bowl-shaped portion and the concrete slab. Dress
The foundation member and the concrete slab are joined in a state where the top end level of the foundation member is set to a predetermined level, and the pressing tool is removed to complete construction of the foundation for the device.
[3] The third feature of the present invention is that the concrete slab is provided with an anchor member protruding upward,
A vertical hole portion through which the anchor member can be inserted in a state where a gap is formed around the anchor member is formed through the base member,
The foundation member is made into a concrete slab in a state where the anchor member of the concrete slab is inserted into the vertical hole portion of the foundation member and a fulcrum member for level adjustment is interposed between the lower surface of the foundation member and the concrete slab. Placed on top
With the attitude of the foundation member adjusted on the concrete slab and the top end level of the foundation member set to a predetermined level, a curable filler is filled between the vertical hole and the lower surface of the foundation member and the concrete slab. Is to cure.

  That is, according to this configuration, on the concrete slab, with the anchor member inserted through the vertical hole portion, the clearance around the anchor member is used as a movement allowance, and the base member is moved using the fulcrum member as a fulcrum. Accordingly, the posture adjustment of the base member can be easily performed, and the top end level of the base member can be easily set to a predetermined level with high accuracy.

  Then, with the top end level of the foundation member set to a predetermined level, the vertical hole portion through which the anchor bolt is inserted and the concrete slab with the fulcrum member interposed between the foundation member and the curable filler are filled. Then, the base member whose top end level is adjusted with high accuracy can be firmly joined to the concrete slab while maintaining its posture.

  The foundation member is arranged in a state where the gap between the concrete slab serving as the filling region of the curable filler and the foundation member communicates with the longitudinal hole portion of the foundation member, and the gap and the longitudinal hole portion are inserted through the longitudinal hole portion. If both are filled, the filling workability of the curable filler can be improved, and higher workability can be secured.

Perspective view showing the rooftop of the building where the foundation for equipment was built Perspective view showing the construction method of equipment foundation Sectional view in the long side showing the construction method of the foundation for equipment (1) Sectional view in the short-side direction showing the construction method of the foundation for equipment (1) Sectional view in the long side showing the construction method of the foundation for equipment (2) Sectional view in the short-side direction showing the construction method of the foundation for equipment (2)

  FIG. 1 shows an equipment foundation F constructed on a rooftop R of a building in order to install various equipment M such as a cooling tower, a pump, a compressor, a water receiving tank, a cubicle (high voltage power receiving equipment), etc. Is constructed by joining a base member 2 made of precast concrete on a concrete slab 1. Although illustration is omitted, the device bases F are distributed and arranged at a plurality of locations according to the shape of the device M such as the four corners of the device M. In this embodiment, the concrete slab 1 is supported from below by the steel beam 3 (see FIGS. 3 to 6).

  The foundation member 2 is configured as a pre-formed member having a rectangular shape in plan view by placing concrete in advance at a production site or the like secured at a factory or site, and as shown in FIG. 3 and FIG. A plurality of equipment anchor bolts 4 (an example of an equipment mounting portion, an example of an anchor member) for joining the M mount) and an anchor reinforcement 5 for a base member for joining the concrete slab 1 (an example of an anchor member) ) Through which a plurality of vertical holes 2a can be inserted, and a pressed surface 2b for pressing with a pressing tool 6 (an example of a pressing means) for posture adjustment.

  The plurality of anchor bolts 4 for equipment are integrally provided on the base member 2 in a state where the upper side serving as the attachment site protrudes from the upper surface 2A of the base member 2. The anchor bolt 4 for equipment may be integrated with the base member 2 by being embedded when the base member 2 is manufactured (concrete placing), or the upper surface 2A of the base member 2 after the base member 2 is manufactured. May be fixed to the base member 2 by a post-coating method of fixing the hole to the hole.

  As shown in FIG. 3 and FIG. 4, the plurality of vertical hole portions 2 a extends from the upper surface 2 </ b> A to the lower surface (bottom surface) 2 </ b> B of the base member 2 at a position different from the embedded fixing portion of the device anchor bolt 4. And it penetrates in the arrangement | positioning state disperse | distributed to the position remove | deviated from the to-be-supported site | part by the side of the lower surface 2B supported by the fulcrum member 7 mentioned later.

  The hole diameter r1 of the vertical hole portion 2a is set to a dimension that allows the base member anchor reinforcing bar 5 to be inserted in a state where a clearance S1 corresponding to a movement allowance is formed around the base member anchor reinforcing bar 5.

  The arrangement relationship between the plurality of vertical hole portions 2a and the supported portion by the fulcrum member 7 on the lower surface 2B side of the base member 2 will be described in detail. As shown in FIG. The second part 2e on the lower surface center side to be a supported part by 7 and the six parts away from the third and fourth parts 2f, 2g away from both sides in the long side direction (an example of a plurality of parts) A vertical hole 2a is disposed in each of the two.

  Then, as shown in FIG. 4, the group of the six vertical hole portions 2 a has a short side from the first part 2 d on the lower surface center side which is a supported part by the fulcrum member 7 in the short side direction of the base member 2. They are arranged in parallel at two locations (an example of a plurality of locations) that deviate in both directions.

  The pressed surface 2 b is provided in the entire area (all parts) of the outer peripheral part of the base member 2 so that an appropriate part of the outer peripheral part of the base member 2 can be pressed by the pressing tool 6. The pressed surface 2 b is composed of a lower surface of a flange-shaped portion 2 </ b> D integrally formed on the upper side of the outer peripheral portion of the base member 2, and is configured to be annularly connected along the outer peripheral portion of the base member 2.

  In addition, the width (depth dimension) W of the pressed surface 2b is set to a size that allows the central axis 6a of the pressing tool 6 to be disposed between the opposing surfaces of the concrete slab 1 and the pressed surface 2b, and will be described later. At the time of construction of F, the pressing tool 6 is configured to efficiently press the pressed surface 2b from below.

  As shown in FIGS. 5 and 6, the foundation member 2 is provided on the concrete slab 1 side with the top end level (the level of the upper surface 2A) set to a predetermined level such as horizontal. It is firmly joined to the concrete slab 1 via the anchor rebar 5 and the curable filler 8.

Next, the construction method of the above-described equipment foundation F will be described.
First, as shown in FIG. 2, the concrete member anchor rebar 5 is provided on the concrete slab 1 with the tip side protruding upward, and a plurality of fulcrum members 7 are disposed at predetermined positions on the upper surface 1 </ b> A of the concrete slab 1. .

  The anchor rebar 5 for the foundation member is configured integrally with the concrete slab 1 by placing concrete in a state where the reinforcement is placed together with the slab rebar (not shown) when the concrete slab 1 is constructed. As described above, when the concrete slab 1 is constructed, it is sufficient to arrange the anchor rebar 5 for the foundation member. Therefore, the concrete slab 1 can be constructed without waiting for the foundation member 2 to be loaded. The production period of the member 2 can also be secured.

  In addition, the anchor rebar 5 for the foundation member is similar to the above-described anchor bolt 4 for equipment, for example, a concrete slab is formed by a post-coating method in which the upper surface 1A of the concrete slab 1 is drilled after the concrete slab 1 is constructed and fixed in the hole. 1 may be fixed.

  The fulcrum member 7 can be composed of various materials such as metal, wood, synthetic resin, curable material such as concrete and non-shrink mortar. In the present embodiment, a method of constructing the fulcrum member 7 at a predetermined position by placing a non-shrink mortar in a block shape at a predetermined position on the upper surface 1A of the concrete slab 1 is used.

  As shown in FIG. 3, each fulcrum member 7 is configured such that the upper surface 1A of the concrete slab 1 is formed as an inclined surface with a water gradient due to rainwater drainage or the like, whereas the water on the upper surface 1A of the concrete slab 1 Considering the gradient, the fulcrum member 7 on the underwater side is configured such that the height dimension (projecting dimension upward from the upper surface 1A of the concrete slab 1) is increased, so that the upper end support portion of each fulcrum member 7 is the same. Adjust so that it is aligned with or near the horizontal plane.

  By adjusting the height of the upper end support portion of each fulcrum member 7 in this manner, the posture change amount to the side where the upper surface 2A of the base member 2 is horizontal in the post-step adjustment of the base member 2 is reduced. Then, the top level of the base member 2 can be easily adjusted.

  Then, as shown in FIGS. 3 and 4, the anchor rebar 5 for the base member on the concrete slab 1 side is inserted into the vertical hole portion 2a of the base member 2 carried into the site, and the bottom surface 2B of the base member 2 is covered. The foundation member 2 is arranged on the concrete slab 1 with each fulcrum member 7 interposed between the opposed surfaces of the support site and the concrete slab 1.

  At this time, between the inner peripheral surface of the vertical hole portion 2a of the base member 2 and the outer peripheral surface of the anchor reinforcing bar 5 for the base member, a gap S1 serving as a movement allowance of the anchor reinforcing bar 5 for the base member is formed, A gap S2 is formed between the lower surface 2B of the foundation member 2 and the concrete slab 1, and the gap S2 on the lower surface 2B side and the inside of the vertical hole portion 2a of the foundation member 2 are in communication with each other.

  A pressing tool 6 is interposed between the pressed surface 2 b and the upper surface 1 A of the concrete slab 1 on each corner (four corners) side of the outer peripheral portion of the base member 2. Since the pressed surface 2b is integrally formed with the base member 2 in advance, the pressing tool 6 can be easily interposed. The pressing tool 6 is made of a hydraulic (an example of a fluid operation type) jack that can be expanded and contracted, and can push up the pressed surface 2b along the vertical direction with the upper surface 1A of the concrete slab 1 as a reaction fulcrum. It is configured.

  Next, each pressing tool 6 provided on each corner side of the base member 2 is expanded and contracted, the clearance S1 around the anchor rebar 5 for the base member is used as a movement allowance, and the base member is used with each fulcrum member 7 as a fulcrum. By moving the posture 2 forward, backward, left and right, the top end level (level of the upper surface 1A) of the base member 2 is set to a predetermined level where the upper surface 1A is horizontal or substantially horizontal.

  Then, as shown in FIGS. 5 and 6, with the top end level of the base member 2 set to a predetermined level, the gap S1 inside the vertical hole portion 2a, the lower surface 2B of the base member 2, and the concrete slab 1 is filled with a curable filler 8 in a gap S2 between the upper surface 1A of the two. In the present embodiment, a cement-based non-shrink grout material is used as the curable filler 8.

  In the filling operation of the curable filler 8, first, the outer peripheral portion of the gap S2 between the lower surface 2B of the base member 2 and the upper surface 1A of the concrete slab 1 is closed with a non-shrink mortar (an example of a closing material) to prevent leakage. By forming the portion 9 and then injecting the curable filler 8 from the upper opening 2h of the vertical hole portion 2a using the fact that the vertical hole portion 2a of the base member 2 and the gap S2 are in communication with each other. The gap S2 is filled with the curable filler 8, and the gap S1 inside the vertical hole portion 2a is continuously filled with the curable filler 8.

  At this time, the injection of the curable filler 8 may be performed by, for example, filling the inside of the other vertical hole portion 2a with the curable filler 8 through the upper opening 2h of the vertical hole portion 2a that is the most underwater, It is carried out until it can be confirmed that the curable filler 8 overflows from the upper opening 2h of the vertical hole portion 2a, or is carried out sequentially from the vertical hole portion 2a on the water side toward the water side. The curable filler 8 can be reliably filled in the entire gaps S1 and S2.

  Then, while setting the curing period, the curable filler 8 is cured, and the pressing tool 6 is removed to complete the construction of the equipment foundation F.

[Other Embodiments]
(1) In the above-described embodiment, the concrete slab 1 on which the equipment foundation F is constructed is shown as an example formed on the rooftop R of the building. There may be.

  (2) In the above-described embodiment, the predetermined level as the adjustment target of the top end level of the base member 2 is shown as an example in which the set height position and the entire surface are horizontal or substantially horizontal. It can be set as appropriate according to the type of the device M to be installed and the device mount, such as an inclined one.

  (3) In the above-described embodiment, the case where the pressed surface 2b is provided in the entire outer peripheral portion (all portions) of the base member 2 has been described as an example. The pressed surface 2b may be dispersedly arranged.

  (4) In the above-described embodiment, the case where the posture of the base member 2 is adjusted by the pressing force of the pressing tool 6 is shown as an example, but the posture of the base member 2 may be adjusted by other methods.

  (5) In the above-described embodiment, the non-shrinking mortar which is an example of the curable material is shown as an example of the plugging material constituting the leak-proof portion 9, but it is a metal angle, a resin packing, or the like. Also good.

  (6) In the above-described embodiment, the case where the anchor member is interposed to join the base member 2 to the upper surface 1A of the concrete slab 1 via the anchor member has been shown as an example. May be.

F Equipment Foundation 1 Concrete Slab 2 Foundation Member 2a Vertical Hole 2b Pressed Surface 5 Anchor Member (Anchor Rebar for Foundation Member)
6 Pressing means (pressing tool)
7 fulcrum member 8 curable filler

Claims (3)

The foundation for equipment is composed of foundation members made of precast concrete,
In the construction method of the foundation for equipment in which the foundation member and the concrete slab are joined in a state where the posture of the foundation member is adjusted on the concrete slab and the top end level of the foundation member is set to a predetermined level .
To adjust the attitude of the foundation member on the concrete slab,
A downwardly pressed surface is integrally formed on the outer peripheral portion of the base member,
The pressed surface is constituted by a lower surface of a bowl-shaped portion integrally formed in a form protruding outward on the upper side of the outer peripheral portion of the foundation member,
A method for constructing a foundation for equipment, wherein the upper surface of the concrete slab is used as a reaction force fulcrum to press the pressed surface from below with pressing means . In order to adjust the posture of the foundation member on the concrete slab, a pressing tool as the pressing means is interposed between the lower surface of the bowl-shaped portion and the concrete slab,
The equipment according to claim 1 , wherein the foundation member and the concrete slab are joined with the top end level of the foundation member set to a predetermined level, and the construction of the equipment foundation is completed by removing the pressing tool . How to build the foundation. An anchor member protruding upward is provided to the concrete slab, and
A vertical hole portion through which the anchor member can be inserted in a state where a gap is formed around the anchor member is formed through the base member,
The foundation member is made into a concrete slab in a state where the anchor member of the concrete slab is inserted into the vertical hole portion of the foundation member and a fulcrum member for level adjustment is interposed between the lower surface of the foundation member and the concrete slab. Placed on top
With the attitude of the foundation member adjusted on the concrete slab and the top end level of the foundation member set to a predetermined level, a curable filler is filled between the vertical hole and the lower surface of the foundation member and the concrete slab. The method for constructing a foundation for an apparatus according to claim 2, wherein the foundation is cured.

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