JP2977367B2 - Precast concrete block foundation for modular buildings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a precast concrete block (hereinafter referred to as "PC block") foundation used for a unit building.

[0002]

2. Description of the Related Art Conventionally, the foundation of a building has been constructed by constructing a formwork and casting concrete at the site.
In order to shorten the construction period on site, a PC block foundation formed of PC blocks pre-manufactured in a factory has been used.

Conventionally, the PC blocks constituting the foundation of the PC blocks are usually connected by using bolts and nuts at the connecting surface portions of the respective blocks.
Connection work must be performed for each connection surface of the block,
There was a problem that workability was poor. For this reason, a PC steel material is provided by penetrating a plurality of PC blocks, the PC steel material is tensioned, and the blocks are crimped to connect the plurality of PC blocks together, thereby improving workability. It has been proposed (see JP-A-64-29525).

[0004]

However, since such conventional PC blocks are generally formed in an inverted inverted C-shape with a footing portion and a rising portion, they cannot be stacked and transported. There was a problem that transportation efficiency was low. Also, Japanese Patent Application Laid-Open No.
In the PC block foundation described in Japanese Patent Application Laid-Open No. 4-29525, the height position of the pipe for inserting the PC steel material formed in each PC block is shifted so that the PC steel material does not interfere at corners and cross portions of the foundation. Therefore, there is also a problem that the types of PC blocks are increased and the production, management, and assembling work on site are complicated.

[0005] Further, the foundation composed of PC blocks has a structural problem that the strength of the entire foundation is reduced if the connection between the PC blocks is insufficient, so that the PC
What was able to connect the blocks reliably and firmly was demanded.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a PC block foundation for a unit-type building that can simplify the production, management, and assembly work of PC blocks, improve transport efficiency, and reliably and firmly connect PC blocks. To provide.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a precast concrete block foundation for use in a unit-type building composed of a plurality of building units, wherein a footing portion is provided at a position where predetermined columns of the building unit are arranged. Is installed, and a cloth base block formed in a substantially plate shape with a size corresponding to the module size of the building unit is installed between the bundle base blocks, and a PC steel material formed in each block is inserted. Placed through the hole
And penetrate the fabric base block in the longitudinal direction, and
Provided between the bundled basic blocks located at both ends of the block
The PC steel material are, the signed and nervous bundle basic block portion, is characterized in that the linked and pressed each block by adding prestress to each block.

[0008] In the above, the bundle basic block is 4
In a general building unit having two pillars, it may be installed under all pillars. For example, when two building units are arranged adjacent to each other in the short side direction, the outer building unit which is not adjacent to another building unit is arranged. It may be installed only under the pillar.

[0009]

According to the present invention, the bundle foundation blocks are installed at predetermined column positions of the building unit, and the cloth foundation blocks are installed between the bundle foundation blocks. Then cloth foundation
PC steel provided between each bundle basic block that sandwiches the block
The material is placed through the PC steel material insertion hole of each block and
After the base block is penetrated in the longitudinal direction, both ends are tightened and fastened at the bundle base block portion, and each block is connected by applying a prestress and crimping. Then, predetermined pillars of the building unit are arranged on the bundle foundation block and fixed to the foundation to complete a unit building.

At this time, since the long cloth base blocks are formed in a substantially plate shape, they can be stacked and transported, and the transport efficiency of the base blocks is improved. In addition, a bundle foundation block is installed at a predetermined pillar position of the building unit, that is, a bundle foundation block is installed at a corner or a cross portion of the foundation, and a cloth foundation block disposed between the bundle foundation block and the bundle foundation block is placed. As one unit is press-bonded with PC steel, the PC steel does not intersect at corners or crosses of the foundation. For this reason, it is not necessary to produce a plurality of types of base blocks in which the height positions of the PC steel material insertion holes are different, and production and management of PC blocks and assembly on site are simplified. Furthermore, since the bundle foundation block and the cloth foundation block are pre-stressed with a PC steel material and crimped, the respective foundation blocks are securely and firmly connected.

[0011]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a PC of a unit-type building 2 in which four box-type building units 1 are arranged side by side to form a first floor portion.
The block foundation 3 is shown. PC block basics 3
Is a bundle base block 10 for a corner portion of the foundation 3, a bundle base block 20 for a cross portion, and the building unit 1
The fabric base block 30 on the long side, which is formed in a size corresponding to the length dimension of the long side beam and is disposed between the bundle foundation blocks 10 and 20, and the short side beam of the two building units 1 arranged side by side Each of the bundle base blocks 10 and the short-side cloth base blocks 40 are formed between the bundle base blocks 20 and between the bundle base blocks 20.

The bundle base block 10 for the corner portion is installed at the corner portion of the foundation 3 on which the cloth base blocks 30 and 40 are arranged orthogonally, and as shown in FIG. 2, a flat footing portion 11 and a column-shaped rising portion. And a unit 12. On the two side surfaces of the rising portion 12 to which the fabric base blocks 30 and 40 are joined, a ridge 13 for joining is provided. On the other hand, a concave portion 14 is formed on the other side surface of the rising portion 12, that is, on the outer peripheral side of the foundation 3, and a PC steel material insertion hole 15 penetrating toward each convex ridge portion 13 is formed in the concave portion 14. I have. As shown in FIG. 1, a brace insertion hole 16 through which a reinforcing brace 4 formed of a reinforcing bar or an iron wire is inserted is formed between the two side surfaces where the PC steel material insertion hole 15 is formed. . Further, an anchor bolt insertion hole 17 and a level adjustment bolt 18 are provided on the upper surface of the rising portion 12.

The bundle base block 20 for the cross section is shown in FIG.
As shown in FIG. 3, two cloth base blocks 30 and 40 are installed at an intermediate portion on the long side of the base 3 where the cloth base blocks 30 are intersected, and as shown in FIG. It comprises a portion 21 and a rising portion 22. Cloth base blocks 30, 4 of bundle base blocks 20
0 is provided on each of the three side surfaces to be joined, and on the other side surface of the rising portion 22, that is, on the outside side of the foundation 3, a PC steel material insertion hole 25 and a brace insertion hole. A recess 24 in which 26 is formed is provided. An anchor bolt insertion hole 27 and a level adjustment bolt 28 are provided on the upper surface of the rising portion 22.

The cloth base block 30 is a bundle base block 1
4, is formed in a plate shape with a predetermined size set by the module size on the long side of the building unit 1 to be installed, as shown in FIG. Concave portion 3 fitted to convex ridge portions 13 and 23
1 is formed. Also, between the concave streak portions 31, two P parallel to each other along the longitudinal direction of the cloth base block 30.
The C steel material insertion hole 32 is penetrated.

The cloth base block 40 is a bundle base block 1
0 and between the bundle base block 20, respectively,
As shown in FIG. 5, in a predetermined size set by the short sides of the module size of the fabric base block 30 in the same manner as the building unit 1 is formed in a plate shape, concave portion 41 and the fabric basis Bed
PC steel insertion hole 42 formed in the longitudinal direction of lock 40
It has. A central portion in the longitudinal direction is formed wider than other portions, a sheath tube 43 is embedded, and a level adjusting bolt 44 is provided on the upper surface. The number of the sheath pipes 43 and the level adjustment bolts 44 is determined by the number of columns of the building unit 1 installed in that part, and four cloth pipes are provided in the cloth base block 40 arranged in the central part of the base 3. 43 and a level adjusting bolt 44 are provided.

In this embodiment, as shown in FIG. 1, a bundle foundation block 10 is installed at a position below a pillar at a corner of a unit building 2 composed of four building units 1 and is arranged in a longitudinal direction. The bundle foundation blocks 20 are installed at positions below the pillars of the adjacent building units 1, and the cloth foundation blocks 30 and 40 are installed between the bundle foundation blocks 10 and 20. Next, as shown in FIGS. 6 and 7, the PC steel material insertion holes 15, 25, and 25 of the respective base blocks 10, 20, 30, and 40 are also provided.
PC steel material 50 is inserted through 32, 42 and cloth base block
30 and 40 are penetrated in the longitudinal direction. Thereafter , the PC steel material 50 is formed in the concave portions 14 and 24 of the bundle basic blocks 10 and 20.
Nut 5 through the anchor plate 51 to the screw at the end of
Screw 2 and tighten. PC steel 5
As a result, prestress is applied to the bundle base blocks 10, 20 and the cloth base blocks 30, 40, and the blocks 10, 20, 30, 40 are crimped to each other to be firmly connected. In addition, as the PC steel material 50, a PC steel wire, PC
Steel strands, PC steel bars, unbonded PC steel materials, etc. can be used.

Further, the brace 4 is inserted into the brace insertion holes 16 and 26 of the bundle base blocks 10 and 20 arranged on the diagonal line of the base 3, and the recesses 14 and
A nut 52 is screwed into an end of the brace 4 via an anchor plate 51 at a portion 24 and tightened to reinforce the foundation 3. Then, the lower end of each of the basic blocks 10 to 40 is filled with soil to such an extent that the footing portions 11 and 21 of the bundle basic blocks 10 and 20 are hidden, and the construction of the PC block foundation 3 is completed.

Next, the building units 1 are placed on the assembled foundations 3 and fixed to the foundations 3 using anchor bolts 6 protruding from the lower ends of the columns 5 of each unit 1. That is, as shown in FIGS.
On the upper side, the anchor bolts 6 of the unit 1 are inserted into the anchor bolt insertion holes 17 and 27 of the blocks 10 and 20, and the recesses 14 and 24 of the bundle base blocks 10 and 20 are inserted.
The building unit 1 is fixed to the foundation 3 by screwing the nut 53 to the anchor bolt 6 at. On the other hand, on the cloth base block 40, as shown in FIG. 10, the grout agent 54 is filled in the sheath tube 43 embedded in the cloth base block 40, and then the anchor bolt 6 is inserted into the sheath tube 43. The building unit 1 is fixed to a foundation 3. In addition, the concave portion 1 of each bundle basic block 10, 20
4 and 24 cover with the cover 55 fitted after the installation of the building unit 1.

As described above, the PC block foundation 3 and the first-floor living room portion of the unit building 2 are formed, and the other building units 1 are placed on the building unit 1 as necessary, so that the predetermined number of floors can be obtained. Is constructed.

According to this embodiment, the PC block foundation 3 of the unit building 2 is divided into a plurality of bundle foundation blocks 1.
0, 20 and cloth basic blocks 30, 40,
Since the pre-stress is applied between the bundle base blocks 10 and 20 sandwiching the cloth base blocks 30 and 40 using the C steel material 50 and pressed, the blocks 10 to 40 can be firmly connected and have sufficient strength. The foundation 3 can be assembled.

In consideration of the fact that it is the foundation 3 used for the unit-type building 2, the bundle foundation blocks 10, 21 having footing portions 11, 21 below predetermined columns 5 to which a force is applied in the unit-type building 2, 20 and the plate-like cloth base blocks 30 and 40 having no footing portion are provided between the bundle base blocks 10 and 20, so that particularly long cloth base blocks 30 and 40 are stacked. And transport efficiency can be improved as compared with the conventional case in which only inverted inverted PC blocks are used.

Furthermore, one cloth base block 30, 40
P between every two of the bundle basic blocks 10 and 20
Since the C steel material 50 is provided, the PC steel material 50 does not intersect. For this reason, it is not necessary to displace the PC steel material insertion holes 15, 25, 32, and 42 formed in each of the basic blocks 10 to 40 in the height direction so that the PC steel material 50 crosses three-dimensionally. Therefore, the insertion holes 15, 25, 32, and 42 of the respective basic blocks 10 to 40 can be easily formed, and the insertion holes 15, 25, and 3 can be formed as the respective basic blocks 10 to 40.
Since it is not necessary to produce a plurality of kinds of base blocks having different height positions of 2, 42, the productivity of each of the basic blocks 10 to 40 can be improved, and the management can be facilitated, so that it can be easily handled at a factory or a site. it can.

Further, since the PC steel material 50 is tightened at the recessed portions 14 and 24 opened on the outer peripheral side of the bundle base blocks 10 and 20, the tightening operation can be performed from outside the base 3. For this reason, workability at the time of installation of the foundation 3 can be improved, and inspection and the like after construction can be easily performed.

Further, the connection between the building unit 1 and the foundation 3 in the bundle basic blocks 10 and 20 is achieved by passing the anchor bolts 6 through the anchor bolt insertion holes 17 and 27 of the bundle basic blocks 10 and 20 and screwing the nut 53 together. Then, the work of fixing the building unit 1 can be easily performed.

The building unit 1 and the bundle foundation block 1
Anchor bolt 6 and nut 53 are fixed to 0, 20.
Since the connection of the basic blocks 10 to 40 is performed by the PC steel material 50 and the nut 52, if it becomes necessary to remove the unit-type building 2, each nut 5
By removing 2, 53, etc., the building unit 1, the foundation 3, and each of the foundation blocks 10 to 40 of the foundation 3 can be easily separated, and the unit building 2 can be removed in a short period of time. Furthermore, since the foundation 3 is composed of the foundation blocks 10 to 40, it can be constructed more easily and in a shorter time than a foundation that is constructed by driving concrete on site. Also,
Since the unit-type building 2 is constructed by installing the building unit 1 produced in the factory on the foundation 3, the on-site work can be reduced and the construction period can be shortened. Therefore, the unit-type building 2 that can be easily constructed and removed in a short period of time can be constructed, which is particularly suitable for a temporary building at a construction site, a disaster site, an event site, or the like.

Also, since the reinforcement is provided by the brace 4, the strength of the PC block foundation 3 can be further improved. Further, the convex ridges 13, 23 and the concave ridges 31, 41 are fitted to fit the bundle basic blocks 10, 20 and the cloth basic block 3.
Since 0 and 40 are connected, each basic block 10-4
0 can be accurately and easily positioned. Further, since the PC steel material 50 is inserted through the convex ridges 13 and 23 and the concave ridges 31 and 41,
The 23 and the recesses 31, 41 are firmly fitted by the prestress of the PC steel material 50, and can be securely and firmly joined without being displaced or dislodged.

The present invention is not limited to the above-described embodiment, but includes modifications and improvements as long as the object of the present invention can be achieved. For example, in the above-described embodiment, some pillars 5 of the building unit 1 are fixed to the cloth foundation block 40. The blocks 10 and 20 may be fixed. However, since the short side of the building unit 1 has a short dimension as in the above embodiment,
When two or more building units 1 are arranged side by side in the short side direction, the force can be transmitted to the bundle foundation block 10 via the cloth foundation block 40 without providing a bundle foundation block at the joint thereof. There is also the advantage that the support is possible in the block 40, whereby the number of basic blocks 10 to 40 can be reduced.

Further, the shapes, structures, and the like of the bundle basic blocks 10, 20 and the cloth basic blocks 30, 40 are not limited to those of the above-described embodiment, and may be appropriately set in the embodiment.

[0029]

According to the present invention as described above, the production, management and assembly work of the PC blocks can be simplified, the transport efficiency can be improved, and the PC blocks can be connected securely and firmly. is there.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a PC block base according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a bundle base block for a corner portion of the present embodiment.

FIG. 3 is a perspective view showing a bundle base block for a cross portion of the embodiment.

FIG. 4 is a perspective view showing a cloth base block on a long side of the embodiment.

FIG. 5 is a perspective view showing a cloth base block on the short side of the embodiment.

FIG. 6 is a plan sectional view showing a corner portion of a PC block foundation of the present embodiment.

FIG. 7 is a plan sectional view showing a cross portion of the PC block foundation of the present embodiment.

FIG. 8 is a longitudinal sectional view showing a corner portion of a PC block foundation of the present embodiment.

FIG. 9 is a longitudinal sectional view showing a cross portion of the PC block foundation of the present embodiment.

FIG. 10 is a vertical cross-sectional view illustrating a joint portion between the cloth foundation block and the building unit according to the present embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Building unit 2 Unit type building 3 PC block foundation 5 Column 10,20 Bundle foundation block 30,40 Fabric foundation block 11,21 Footing part 12,22 Rise part 15,25,32,42 PC steel material insertion hole 50 PC steel material

Claims (1)

(57) [Claims] 1. A precast concrete block foundation for use in a unit-type building composed of a plurality of building units, wherein the bundle foundation is installed at a position where predetermined columns of the building unit are arranged, and has a footing portion. Block, and a cloth base block arranged between these bundle base blocks and formed in a substantially plate shape with a size corresponding to the module size of the building unit, and formed in each block. Through the PC steel material insertion hole , penetrates the fabric base block in the longitudinal direction, and
It is set between the bundle foundation blocks located at both ends of the foundation block.
The vignetting the PC steel, the flux tension to be to entered into the base block portion, the prestress applied to each block, the flux base block and fabric foundation blocks
Click is precast concrete block foundation for unitary building, characterized by being crimped connection.