JP7070858B2 - Foundation structure for equipment and construction method - Google Patents

Description

The present invention relates to a foundation structure for equipment and a construction method.

The following Patent Document 1 includes a hot water supply having an upper prefabricated block formed by joining two divided portions into one block and a lower prefabricated block formed by joining two divided portions into one block. A simple foundation for machine installation is disclosed. The upper prefab block and the lower prefab block are stacked up and down in the direction in which the respective joint surfaces are orthogonal to each other. The stacked upper and lower prefabricated blocks are installed on a mounting surface laid with gravel and kneaded mortar on a steel plate horizontally buried at the bottom of the drilling hole. Further, the lower end is fixed on the mounting surface by inserting a bolt screwed into the steel plate.

Japanese Unexamined Patent Publication No. 2010-24727

However, according to the simple foundation for installing a water heater described in Patent Document 1, the horizontal state of the upper prefabricated block in which the water heater is installed is left to the horizontal state of the steel plate. Therefore, for example, it is desirable that the height of the foundation structure can be easily adjusted at the site where the equipment is installed even after the equipment such as a water heater and a storage battery is installed in the foundation structure.

In consideration of the above facts, an object of the present invention is to obtain a foundation structure and a construction method for equipment that can easily adjust the height of the foundation structure at the site even after the equipment is installed in the foundation structure.

The foundation structure for equipment according to the first aspect is formed in a substantially rectangular shape in a plan view along the bottom of the drilling hole, and one side of the base building is buried in the ground of the building foundation constituting the foundation part of the building. A concrete plate mounting portion formed on the upper side, a concrete plate portion installed on the upper surface of the plate mounting portion, formed in a substantially rectangular plate shape, and having an upper surface for installing equipment, and the plate. Made of concrete, which is provided on the opposite side of the installation portion and on the lower side of the building on the outer peripheral portion of the concrete plate portion, and has a height adjusting mechanism for moving the lower surface up and down by pressing the lower surface of the concrete plate portion inside. It is composed of a base concrete part and.

According to the basic structure for equipment according to the first aspect, the base concrete portion is provided on the opposite side of the plate installation portion and on the lower side of the building on the outer peripheral portion of the concrete plate portion. Since the base concrete portion has a height adjusting mechanism, the lower surface can be moved up and down by pressing the lower surface of the concrete plate portion. As a result, even if the concrete plate portion is tilted after the equipment is installed, the height of the concrete plate portion can be easily adjusted on site.

Further, according to the equipment foundation structure according to the first aspect, the concrete plate portion is installed on the upper surface of the plate installation portion whose one side is installed on the upper side of the building of the base portion of the building foundation. Therefore, even after the equipment is installed on the upper surface of the concrete plate portion, the portion installed on the upper side of the building of the plate installation portion and the base portion of the concrete plate portion is stable. As a result, the height of the concrete plate portion after the equipment is placed on the concrete plate portion can be easily adjusted because it is only necessary to adjust the height of the portion installed on the other side of the plate installation portion. Can be done.

In the first aspect of the equipment foundation structure according to the second aspect, the concrete plate portion is installed on the upper surface of the plate mounting portion, and the lower concrete plate formed in a substantially rectangular plate shape and the lower concrete portion. A steel plate plate arranged on the upper surface of the plate and formed in a substantially rectangular plate shape, and an upper concrete plate arranged on the upper surface of the steel plate plate and formed in a substantially rectangular plate shape and on which equipment can be installed on the upper surface. , Is inserted into a bolt insertion hole formed so as to penetrate in the thickness direction, and includes a bolt that integrally connects the lower concrete plate, the steel plate plate, and the upper concrete plate.

According to the basic structure for equipment according to the second aspect, the concrete plate portion is configured in a state where the lower concrete plate, the steel plate plate, and the upper concrete plate are integrally connected by bolts. Therefore, when the concrete plate portion is installed on the upper surface of the plate installation portion, it is not necessary to place concrete, and the workability of installing the concrete plate portion can be improved.

In the second aspect, the foundation structure for equipment according to the third aspect is integrally formed by abutting the blocks divided into four in a plan view with each other, and the upper concrete plate is integrally formed. The blocks divided into four in a plan view are brought into contact with each other to be integrally formed.

According to the basic structure for equipment according to the third aspect, the upper concrete plate and the lower concrete plate are integrally formed by abutting the blocks divided into four in a plan view with each other. Therefore, it is possible to easily carry and construct each of the divided portions, which has been reduced in weight by being divided. This makes it possible to further improve the workability of installing the concrete plate portion.

The foundation structure for equipment according to the fourth aspect is the same as that in any one of the first to third aspects, the height adjusting mechanism includes a nut embedded in the base concrete portion and the nut. It is configured to include a bolt that is screwed and raised along the axial direction of the nut to move the lower surface of the concrete plate portion up and down.

According to the equipment foundation structure according to the fourth aspect, the lower surface of the concrete plate portion can be moved up and down by raising the bolt screwed to the nut. This makes it possible to easily adjust the height of the concrete plate portion on site even after the equipment is installed on the concrete plate portion.

In the fourth aspect of the basic structure for equipment according to the fifth aspect, a metal reinforcing portion is provided at a portion pressed by the height adjusting mechanism on the lower surface side of the concrete plate portion.

According to the basic structure for equipment according to the fifth aspect, a metal reinforcing portion is provided at a portion pressed by the height adjusting mechanism on the lower surface side of the concrete plate portion. This makes it possible to easily adjust the height of the concrete plate portion in the field while suppressing or preventing damage to the lower surface of the concrete plate portion due to being pressed by the height adjusting mechanism.

In the method of constructing the foundation structure for equipment according to the sixth aspect, one side is located on the upper side of the building of the base portion buried in the ground of the building foundation constituting the foundation part of the building, and is formed in a substantially rectangular shape in a plan view. The bottom is a concrete base concrete portion equipped with a first step of forming an excavation hole having a bottom surface and a height adjusting mechanism for moving the lower surface up and down by pressing the lower surface of the concrete plate portion inside. A second step of arranging the building on the opposite side of the building, and a concrete plate formed in a substantially rectangular shape in a plan view along the bottom of the drilling hole, and one side of the base is located on the upper side of the building. It includes a third step of forming an installation portion and a fourth step of installing the concrete plate portion formed in a substantially rectangular plate shape and having an upper surface for installing equipment on the upper surface of the plate installation portion. It is composed of.

According to the construction method of the foundation structure for equipment according to the sixth aspect, the equipment is installed by installing the concrete plate portion having the upper surface for installing the equipment on the upper surface of the plate installation portion formed at the bottom of the excavation hole. Basic structure can be constructed. Therefore, it is not necessary to place concrete to form the concrete plate portion, and the workability of installing the concrete plate portion can be improved.

As described above, in the equipment foundation structure according to the first aspect, the height of the concrete plate portion can be easily adjusted on site even when the concrete plate portion is tilted after the equipment is installed. It has the excellent effect of being able to do it.

The basic structure for equipment according to the second aspect is excellent in that it is not necessary to place concrete when the concrete plate portion is installed on the upper surface of the plate installation portion, and the workability of installing the concrete plate portion can be improved. Has an effect.

Since the foundation structure for equipment according to the third aspect can easily carry and construct each divided portion of the lightweight concrete plate portion by dividing the concrete plate portion, the workability of installing the concrete plate portion is further improved. It has an excellent effect that it can be improved.

The equipment foundation structure according to the fourth aspect has an excellent effect that the height adjustment of the concrete plate portion can be easily performed on site even after the equipment is installed on the concrete plate portion.

The equipment foundation structure according to the fifth aspect has an excellent effect that the height of the concrete plate portion can be easily adjusted in the field while suppressing or preventing damage to the concrete plate portion.

The foundation structure for equipment according to the sixth aspect has an excellent effect that it is not necessary to place concrete for forming the concrete plate portion and the workability of installing the concrete plate portion can be improved.

It is a vertical sectional view of the foundation structure for equipment which concerns on this embodiment. It is a top view which looked at the plate installation part and the base concrete part before the concrete plate which concerns on this embodiment are installed from the upper side of a building. It is a perspective view of the concrete plate and the base concrete part which concerns on this embodiment. It is explanatory drawing of the height adjustment method of the foundation structure for equipment which concerns on this embodiment.

Hereinafter, an embodiment of the basic structure for equipment according to the present invention will be described with reference to FIGS. 1 to 4. The arrows UP appropriately shown in these figures indicate the upper side of the building.

(Structure of building unit)
FIG. 1 shows a vertical sectional view of the foundation structure 10 for equipment. The foundation structure 10 for equipment includes a waste concrete portion 12 as a plate installation portion, a concrete plate portion 30, and a base concrete portion 60.

The equipment foundation structure 10 is configured adjacent to a building foundation 16 which is installed on the ground G and constitutes a foundation portion of a building (not shown). The building foundation 16 includes a base portion (footing) 16A buried inside the ground G with the crushed stone 24 spread on the excavated ground G as a base, and a rising portion 16B rising from the base portion 16A toward the upper side of the building. , Is included. The building foundation 16 is a so-called cloth foundation made of reinforced concrete reinforced by metal bars.

The water heater 14 as a facility is installed on the upper surface 42U of the concrete plate portion 30 so that the back surface thereof is adjacent to the building foundation 16. The leg portion 14A of the water heater 14 is fixed to the upper surface 42U by the anchor bolt 18. On the side of the water heater 14 away from the building foundation 16, a front surface on which an operation panel and the like (not shown) are arranged is formed. Hereinafter, the back side of the water heater 14 is referred to as "the back side of the water heater", and the front side of the water heater 14 is referred to as "the front side of the water heater".

The equipment foundation structure 10 is installed in an excavation hole 22 in which the bottom portion 22A is formed in a substantially rectangular shape by excavating the ground SE. Here, the excavation hole 22 is formed inside the shallow ground G from the ground SE to a predetermined depth. As a result, the foundation structure 10 for equipment can avoid interference with water pipes and gas pipes connected in the building. A waste concrete portion 12 as a plate installation portion of the equipment foundation structure 10 is formed in the bottom portion 22A of the excavation hole 22. The discarded concrete portion 12 is formed by placing concrete on the upper side of the building at the bottom 22A of the excavation hole 22 whose horizontal level has been confirmed by a level while the crushed stone 24 is spread and leveled on a substantially rectangular horizontal plane. Has been done.

In the waste concrete portion 12, the back side of the water heater, which is one side, is formed on the upper side of the base portion 16A of the building foundation 16. Therefore, even after the water heater 14 is installed on the upper surface 42U of the concrete plate portion 30, the height of the portion of the discarded concrete portion 12 and the base portion 16A of the concrete plate portion 30 installed on the upper side of the building can be adjusted. Can be stabilized.

A concrete plate portion 30 is installed on the upper surface 12U of the waste concrete portion 12. The concrete plate portion 30 is integrally composed of a lower concrete plate 32, a square cut steel plate 52, and an upper concrete plate 42. The lower concrete plate 32, the square cut steel plate 52, and the upper concrete plate 42 are integrally connected by an insert bolt 56 as a bolt inserted into a bolt insertion hole 40 formed so as to penetrate in the thickness direction of the concrete plate portion 30. Has been done.

A lower concrete plate 32 constituting the lower side of the building of the concrete plate portion 30 is installed on the upper surface 12U of the waste concrete portion 12. As shown in FIGS. 2 and 3, the lower concrete plate 32 is formed in a substantially rectangular shape in a plan view from the upper side of the building by a precast concrete block previously molded in a factory. Further, a circular hole 38 is formed in the central portion of the lower concrete plate 32. The circular hole 38 is formed in a substantially cylindrical shape along the thickness direction of the lower concrete plate 32, and the inner diameter thereof appropriately secures the bending strength and the shear strength of the lower concrete plate 32, and then the lower concrete plate 32. Is set to a size that can reduce the weight.

As shown in FIG. 3, the lower concrete plate 32 is composed of four blocks 32A, 32B, 32C, and 32D divided into four in a plan view. The two boundary portions 34, 36 formed in a substantially cross shape in a plan view of the four blocks 32A, 32B, 32C, and 32D are formed so as to be orthogonal to each other. The four blocks 32A, 32B, 32C, and 32D are integrally formed by bringing the boundary portions 34, 36 of the lower concrete plate 32 into contact with each other. Each of the blocks 32A, 32B, 32C, and 32D divided into four is set to have a weight that allows manual transportation and work. Further, insert bolts 56 are inserted into the four blocks 32A, 32B, 32C, and 32D along the thickness direction of the lower concrete plate 32 at positions where the distances from the centers of the circular holes 38 are substantially the same. A bolt insertion hole 40 for allowing the bolt to be inserted is formed.

As shown in FIG. 1, a square cut steel plate 52 is arranged on the upper surface of the lower concrete plate 32. As shown in FIG. 3, the square-cut steel plate 52 is formed in a substantially rectangular shape in a plan view from the upper side of the building. A circular hole 54 is formed in the central portion of the square-cut steel plate 52. The circular hole 54 is formed in a substantially disk shape along the thickness direction of the square cut steel plate 52, and the inner diameter thereof is such that the square cut steel plate 52 is formed after appropriately ensuring the bending strength and the shear strength of the square cut steel plate 52. It is set to a size that can be reduced in weight. Further, the bolt insertion hole 40 for inserting the insert bolt 56 at a position corresponding to the bolt insertion hole 40 of the lower concrete plate 32 and the distances from the center of the circular hole 54 to the four corners forming the rectangle are substantially the same. Is formed.

The square-cut steel plate 52 is provided in order to reduce the weight and appropriately secure the bending strength and the shear strength of the concrete plate portion 30. Therefore, the thickness of the square-cut steel plate 52 is formed to be thinner than the thickness of the lower concrete plate 32 and the upper concrete plate 42.

The bolt insertion hole 40 formed in the square cut steel plate 52 has an inner diameter smaller than that of the bolt insertion hole 40 formed in the lower concrete plate 32 and the upper concrete plate 42 within a range in which the insert bolt 56 can be inserted. This makes it possible to suppress and prevent the splitting of concrete from the bolt insertion holes 40 of the lower concrete plate 32 and the upper concrete plate 42.

As shown in FIG. 1, an upper concrete plate 42 constituting the upper side of the building of the concrete plate portion 30 is installed on the upper surface of the square-cut steel plate 52. As shown in FIG. 2, the upper concrete plate 42 is formed in a substantially rectangular shape in a plan view from the upper side of the building by a precast concrete block previously molded in a factory. Further, a circular hole 48 is formed in the central portion of the upper concrete plate 42. The circular hole 48 is formed in a substantially cylindrical shape along the thickness direction of the upper concrete plate 42, and its inner diameter appropriately secures the bending strength and the shear strength of the upper concrete plate 42, and then the upper concrete plate 42. Is set to a size that can reduce the weight.

As shown in FIG. 3, the upper concrete plate 42 is composed of four blocks 42A, 42B, 42C, and 42D divided into four in a plan view. The two boundary portions 44, 46 formed in a substantially cross shape in a plan view of the four blocks 42A, 42B, 42C, and 42D are formed so as to be orthogonal to each other. The four blocks 42A, 42B, 42C, and 42D are integrally formed by bringing the boundary portions 44, 46 of the upper concrete plate 42 into contact with each other. Each of the blocks 42A, 42B, 42C, and 42D divided into four is set to have a weight that can be transported and worked by human power. Further, insert bolts 56 are inserted into the four blocks 42A, 42B, 42C, and 42D along the thickness direction of the upper concrete plate 42 at positions where the distances from the centers of the circular holes 48 are substantially the same. A bolt insertion hole 40 for allowing the bolt to be inserted is formed.

As shown in FIG. 1, the lower concrete plate 32, the square cut steel plate 52, and the upper concrete plate 42 are integrally connected by an insert bolt 56 inserted into the bolt insertion hole 40 from the upper side of the building of the upper concrete plate 42. .. The upper end of the insert bolt 56 inserted into the bolt insertion hole 40 is screwed into a nut 58 arranged on the upper concrete plate 42 side. Further, the lower end of the insert bolt 56 is screwed into the nut 58 arranged on the lower concrete plate 32 side. Although the concrete plate portion 30 has been described here as being integrally connected by an insert bolt 56, a rod-shaped bolt having no head is inserted and nuts are screwed into both ends of the bolt. They may be combined together.

On the lower side of the building of the outer peripheral portion 30A of the concrete plate portion 30 on the front side of the water heater as the opposite side of the waste concrete portion 12, a substantially rectangular parallelepiped base concrete extending from the bottom 22A of the excavation hole 22 to the lower side of the building. The part 60 is buried. The base concrete portion 60 is formed so that the upper surface 60U is substantially flush with the upper surface 12U of the waste concrete portion 12. Further, the upper surface 60U of the base concrete portion 60 is formed so as to abut on the lower surface 32L of the lower concrete plate 32 which is the lower surface of the concrete plate portion 30.

At the end of the base concrete portion 60 on the front side of the water heater and on the upper side of the building, a concave portion 62 having a concave shape toward the upper side of the building is formed. A height adjusting mechanism 70 for pressing the lower surface 32L of the lower concrete plate 32 is configured on the lower side of the building of the recess 62. The height adjusting mechanism 70 is configured at a plurality of locations (two locations in the present embodiment) on the outer peripheral portion of the base concrete portion 60 on the front surface side of the water heater.

The height adjusting mechanism 70 includes a cap nut 72 as a nut embedded in the bottom 62A of the recess 62 of the base concrete portion 60 so that the axial direction is the vertical direction of the building, and a bolt 74 screwed into the cap nut 72. , Is included. The bolt 74 is screwed to the cap nut 72 so as to be able to rise along the vertical direction of the building, which is the axial direction of the cap nut 72 by rotating. The bolt 74 can be raised further to the upper side of the building than the position where the head 74A abuts on the lower surface 32L of the lower concrete plate 32. Therefore, the lower surface 32L of the lower concrete plate 32 can be moved up and down by pressing the lower surface 32L with the bolt 74. Although the height adjusting mechanism 70 has been described here as being configured to include the cap nut 72, the height adjusting mechanism 70 is not limited to this, and is configured to include a nut and an iron plate or the like arranged at the lower end of the nut. May be.

On the lower surface 32L side of the lower concrete plate 32 on the front surface side of the water heater, a bolt 74 of the height adjusting mechanism 70 and a reinforcing plate 80 as a metal reinforcing portion are provided on a portion facing the bolt 74 in the axial direction. The reinforcing plate 80 is integrally formed with the lower concrete plate 32 along the lower side of the building of the outer peripheral portion 30A on the front side of the water heater of the lower concrete plate 32. The reinforcing plate 80 is formed along a bottom portion 80A formed along the water heater front side end portion of the lower surface 32L of the lower surface concrete plate 32 and an outer peripheral portion 30A on the water heater front surface side of the lower concrete plate 32, and has a bottom surface. It is configured to include the opposite side portion 80B substantially orthogonal to the portion 80A. Further, the reinforcing plate 80 has one end formed along the joint between the bottom 80A and the opposite side 80B, and the reinforcing plate 80 extends from one end toward the upper side of the building and the back side of the water heater. It is formed. Therefore, in the reinforcing plate 80, a vertical cross section cut in the vertical direction of the building by the bottom portion 80A, the opposite side portion 80B, and the reinforcing portion 80C is formed in an arrow shape having the end portion of the lower surface 32L of the lower concrete plate 32 as the tip. ing.

Next, the operation and the effect will be described through the explanation of the construction method and the height adjustment method of the equipment foundation structure 10 according to the present embodiment.

The foundation structure 10 for equipment is constructed by four steps. In the first step, by excavating the ground SE, an excavation hole 22 having a substantially rectangular bottom portion 22A is formed. The bottom 22A of the excavation hole 22 is covered with crushed stone 24 and leveled on a substantially rectangular horizontal surface, and the horizontal level is confirmed by a spirit level. The excavation hole 22 is formed inside a shallow ground G from the ground SE to a predetermined depth so as to avoid interference with water pipes and gas pipes connected in the building. Further, in order to stabilize the height of the back side of the water heater of the foundation structure 10 for equipment, one side of the bottom portion 22A is formed so as to be located on the upper side of the base portion 16A buried in the ground G of the building foundation 16. To.

In the second step, the base concrete portion 60 provided with the height adjusting mechanism 70 on the front side of the water heater of the bottom 22A is embedded in the lower side of the building of the bottom 22A. Here, the base concrete portion 60 is embedded at a position where the upper surface 60U abuts on the lower surface 32L of the lower concrete plate 32 when the concrete plate portion 30 is installed.

In the third step, the discarded concrete portion 12 is formed along the bottom portion 22A. The discarded concrete portion 12 is formed by placing concrete on the upper side of the building at the bottom 22A of the excavation hole 22 whose horizontal level has been confirmed. Further, in the discarded concrete portion 12, the back side of the water heater, which is one side, is formed on the upper side of the base portion 16A of the building foundation 16. As a result, even after the water heater 14 is installed on the upper surface 42U of the concrete plate portion 30, the height of one side of the discarded concrete portion 12 can be stabilized.

In the fourth step, the concrete plate portion 30 provided with the upper surface 42U for installing the water heater 14 is installed on the upper surface 12U of the waste concrete portion 12. The foundation structure 10 for equipment is configured by discarding the concrete plate portion 30 in which the lower concrete plate 32, the square cut steel plate 52, and the upper concrete plate 42 are integrally formed by the insert bolts 56, and installing the concrete plate portion 30 on the upper surface 12U of the concrete portion 12. .. Therefore, it is not necessary to place concrete to form the concrete plate portion 30, and the workability of installing the concrete plate portion 30 can be improved.

Next, a method of adjusting the height of the equipment foundation structure 10 will be described. The concrete plate portion 30 installed on the waste concrete portion 12 and the upper surface 12U of the waste concrete portion 12 is installed on the back side of the water heater on the upper side of the building of the base portion 16A. Therefore, even after the water heater 14 is installed on the upper surface 42U of the concrete plate portion 30, the portions of the discarded concrete portion 12 and the base portion 16A of the concrete plate portion 30 installed on the upper side of the building are stable. As a result, the height of the concrete plate portion 30 after the water heater 14 is arranged on the concrete plate portion 30 is only the height of the portion installed on the front side of the water heater, which is the other side of the discarded concrete portion 12. It can be easily adjusted because it only needs to be adjusted.

As shown in FIG. 4, the worker P who adjusts the height of the concrete plate portion 30 excavates the ground G on the front side of the water heater of the equipment foundation structure 10. Specifically, the ground G is excavated to the extent that the recess 62 of the base concrete portion 60 is exposed and the hand H of the worker P holding a tool (for example, a spanner 86) can be inserted to rotate the bolt 74. do. The worker P inserts the tip of the spanner 86 into the recess 62 of the base concrete portion from the front side of the water supply machine, and rotates the head 74A of the bolt 74 held by the spanner 86 to direct the bolt 74 toward the upper side of the building. And raise it.

The head 74A of the bolt 74 raised toward the upper side of the building abuts on the bottom 80A of the reinforcing plate 80 integrally molded on the lower surface 32L on the front side of the water heater of the lower concrete plate 32. When the bolt 74 is further raised from the state where the head 74A of the bolt 74 is in contact with the bottom portion 80A, the front side of the water heater of the concrete plate portion 30 is lifted toward the upper side of the building. The front side of the water heater of the concrete plate portion 30 is lifted to a position where the upper surface 42U of the upper concrete plate 42 becomes a horizontal plane. Therefore, a gap CL is formed between the upper surface 60U of the base concrete portion 60 and the lower surface 32L of the lower concrete plate 32. A spacer (not shown) of a metal plate or a wooden plate whose thickness is adjusted according to the gap CL is inserted into the gap CL from the front side of the water heater by the operator P. As a result, the state in which the front side of the water heater of the concrete plate portion 30 is lifted toward the upper side of the building is maintained. When the height adjustment is completed, the excavated ground G on the front side of the water heater of the concrete plate portion 30 is backfilled.

Although the spacer has been described here as a metal plate or a wooden plate, the spacer is not limited to this, and is a member capable of ensuring sufficient bending rigidity and shear rigidity with respect to the weight of equipment such as the water heater 14 and the weight of the concrete plate portion 30. If so, a member other than metal or wood may be used.

According to the equipment foundation structure 10 according to the present embodiment, the base concrete portion 60 is provided on the front side of the water heater of the discarded concrete portion 12 and on the lower side of the building of the outer peripheral portion 30A of the concrete plate portion 30. The base concrete portion 60 includes a height adjusting mechanism 70 that can move the lower surface 32L up and down by pressing the lower surface 32L of the lower concrete plate 32. Therefore, even if the concrete plate portion 30 is tilted after the water heater 14 is installed, the height can be easily adjusted at the site where the water heater 14 is installed.

Further, according to the equipment foundation structure 10 according to the present embodiment, in the concrete plate portion 30, the back surface side of the water heater is the upper surface 12U of the discarded concrete portion 12 installed on the upper side of the base portion 16A of the building foundation 16 of the building. It is installed in. The portion of the concrete plate portion 30 installed on one side of the discarded concrete portion 12 is stably installed by the base portion 16A. Therefore, the height of the concrete plate portion 30 after the water heater 14 is arranged on the concrete plate portion 30 is adjusted by adjusting the portion installed on the front side of the water heater, which is the other side of the discarded concrete portion 12. Can be done. Thereby, the height of the concrete plate portion 30 can be easily adjusted.

Further, according to the equipment foundation structure 10 according to the present embodiment, the bolt 74 can be raised toward the lower concrete plate 32 by rotating the bolt 74. Therefore, the lower surface 32L can be moved up and down by simply pressing the lower surface 32L side on the lower concrete plate 32 side with the raised bolt 74. Further, a reinforcing plate 80 is provided at a portion of the lower concrete plate 32 facing the bolt 74 on the lower surface 32L side in the axial direction. Therefore, the lower concrete plate 32 can be pressed with the bolt 74 in contact with the bottom portion 80A of the reinforcing plate 80. As a result, even after the water heater 14 is installed on the concrete plate portion 30, damage to the lower concrete plate 32 is suppressed or prevented, and the height of the concrete plate portion 30 is adjusted at the site where the water heater 14 is installed. Can be easily done with.

According to the equipment foundation structure 10 according to the present embodiment, the base concrete portion 60 is configured with height adjusting mechanisms 70 at a plurality of locations on the front side of the water heater. Therefore, even when the concrete plate portion 30 on which the water heater 14 is installed is tilted toward the side surface of the water heater 14, the height of the bolt 74 is changed in each height adjusting mechanism 70 to change the height of the water heater 14. Tilt in the lateral direction can be easily performed at the site where the water heater 14 is installed.

To summarize the above, according to the equipment foundation structure 10 according to the present embodiment, the height of the concrete plate portion 30 can be easily adjusted at the site even after the water heater 14 is installed in the equipment foundation structure 10. Can be done.

Further, according to the construction method of the foundation structure 10 for equipment according to the present embodiment, in the concrete plate portion 30, the lower concrete plate 32, the square cut steel plate 52, and the upper concrete plate 42 are integrally connected by the insert bolt 56. It is composed of. Therefore, when the concrete plate portion 30 is discarded and installed on the upper surface 12U of the concrete portion 12, it is not necessary to place concrete, and the workability of installing the concrete plate portion 30 can be improved. Further, the insert bolt 56 inserted into the bolt insertion hole 40 of the concrete plate portion 30 is not exposed in the ground G. Therefore, the progress of corrosion of the insert bolt 56 can be delayed, and the durability of the concrete plate portion 30 can be improved.

Further, according to the equipment foundation structure 10 according to the present embodiment, the lower concrete plate 32 and the upper concrete plate 42 are divided into four in a plan view. Therefore, the weight-reduced divided portions can be easily transported and constructed by the division, whereby the workability of installing the concrete plate portion 30 can be further improved.

Although the height adjusting mechanism 70 has been described here as being composed of a cap nut 72 and a bolt 74, the height adjustment mechanism 70 is not limited to this, and the concrete plate portion is lifted by the principle of leverage using a crowbar-shaped tool. A height adjusting mechanism may be configured rather than the mechanism of.

Further, here, the concrete plate portion 30 has been described as being composed of the lower concrete plate 32, the square cut steel plate 52, and the upper concrete plate 42, but the present invention is not limited to this, and the concrete plate portion 30 is composed of only the lower concrete plate and the upper concrete plate. You may.

10 Foundation structure for equipment 12 Waste concrete part (plate installation part)
12U top surface 14 water heater (equipment)
16 Building foundation 16A Base 22 Excavation hole 22A Bottom 30 Concrete plate 30A Outer circumference 32 Lower concrete plate 32A Block 32B Block 32C Block 32D Block 32L Bottom 40 Bolt insertion hole 42 Upper concrete plate 42A Block 42B Block 42C Block 42D Block 42U Top 52 Steel plate plate (square cut steel plate)
56 Insert bolt (bolt)
60 Base concrete part 70 Height adjustment mechanism 72 Cap nut (nut)
74 Bolt 80 Reinforcing plate (reinforcing part)
G ground

Claims (6)

A concrete plate installation part formed on the upper side of the building of the base part that is formed in a substantially rectangular shape in a plan view along the bottom of the excavation hole and is buried in the ground of the building foundation whose one side constitutes the foundation part of the building. When,
A concrete plate portion that is installed on the upper surface of the plate installation portion, is formed in a substantially rectangular plate shape, and has an upper surface for installing equipment.
Concrete provided on the opposite side of the plate installation portion and on the lower side of the building on the outer peripheral portion of the concrete plate portion, and provided with a height adjusting mechanism for moving the lower surface up and down by pressing the lower surface of the concrete plate portion inside. Base concrete part made of
The foundation structure for equipment configured to include. The concrete plate portion is
A lower concrete plate installed on the upper surface of the plate installation portion and formed in a substantially rectangular plate shape, and
A steel plate placed on the upper surface of the lower concrete plate and formed in a substantially rectangular plate shape,
An upper concrete plate that is placed on the upper surface of the steel plate and is formed into a substantially rectangular plate shape and equipment can be installed on the upper surface.
A bolt that is inserted into a bolt insertion hole formed so as to penetrate in the thickness direction and integrally connects the lower concrete plate, the steel plate, and the upper concrete plate.
The basic structure for equipment according to claim 1, which is configured to include. The lower concrete plate is integrally formed by abutting blocks divided into four in a plan view with each other.
The basic structure for equipment according to claim 2, wherein the upper concrete plate is integrally formed by abutting blocks divided into four in a plan view with each other. The height adjusting mechanism includes a nut embedded in the base concrete portion and a bolt screwed into the nut and raised along the axial direction of the nut to move the lower surface of the concrete plate portion up and down. The basic structure for equipment according to any one of claims 1 to 3, which is configured to include. The basic structure for equipment according to any one of claims 1 to 4, wherein a metal reinforcing portion is provided in a portion pressed by the height adjusting mechanism on the lower surface side of the concrete plate portion. The first step is to form an excavation hole with a bottom that is formed in a substantially rectangular shape in a plan view and is located on the upper side of the base of the base buried in the ground of the building foundation, one side of which constitutes the foundation of the building. ,
A second step of arranging a concrete base concrete portion equipped with a height adjusting mechanism that moves the lower surface of the concrete plate portion up and down by pressing the lower surface of the concrete plate portion on the opposite side of the bottom of the building to the lower side of the building.
A third step of forming a concrete plate installation portion which is formed in a substantially rectangular shape in a plan view along the bottom of the excavation hole and whose one side is located on the upper side of the building of the base portion.
A fourth step of installing the concrete plate portion, which is formed in a substantially rectangular plate shape and has an upper surface for installing equipment, on the upper surface of the plate installation portion.
Construction method of foundation structure for equipment configured including.

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