JPH05306526A - Precast concrete block base for unit type building - Google Patents

Abstract

PURPOSE:To make production, admistration, and fabrication easier, raise the efficiency of transportation, and permit PC blocks to be connected strongly. CONSTITUTION:Clustered base blocks 10 and 20 are set under given columns of a building unit 1, and strip base blocks 30 and 40 are set between the blocks 10 and 20. PC steels are passed through the blocks 30 and 40 and the blocks 10 and 20 on both sides of the blocks 30 and 40 and tensed to give a prestress to the blocks 10-40 in order to strongly connect the blocks 10-40. Since forces are transmitted through columns in the unit type building 1, the needs for footing can be eliminated for the blocks 30 and 40, and therefore, the blocks 30 and 40 can be shaped into plate form and transported in a lapped form with high efficiency.

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 type building.

[0002]

[Background Art] Conventionally, the foundation of a building was constructed by placing a formwork and placing concrete on site, but in recent years,
In order to shorten the on-site construction period, PC block foundations made of PC blocks pre-manufactured in factories have come to be used.

Conventionally, the PC blocks that form the basis of the PC blocks were usually connected by using bolts and nuts at the connecting surface of each block.
You have to do the connecting work for each connecting surface of the block,
There was a problem of poor workability. For this reason, a PC steel material is provided so as to pass through a plurality of PC blocks, and the PC steel materials are tensioned to crimp each block to collectively connect the plurality of PC blocks, thereby improving workability. It has been proposed (see Japanese Patent Laid-Open No. 64-29525).

[0004]

However, such conventional PC blocks cannot be stacked and transported because they are formed in a substantially inverted letter shape with a footing portion and a rising portion. There was a problem of low transport efficiency. In addition, Japanese Patent Laid-Open Publication No. Sho 6 (1994) using a PC steel material.
In the PC block foundation described in Japanese Patent Publication 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 with the corner portion or the cross portion of the foundation. Therefore, the number of types of PC blocks has increased, and the production, management, and assembling work on the site become complicated.

Further, the foundation composed of PC blocks has a structural problem that the strength of the entire foundation is lowered if the PC blocks are not sufficiently connected to each other.
There has been a demand for one that can reliably and firmly connect blocks to each other.

An object of the present invention is to provide a PC block foundation for a unit-type building, which can simplify the production, management, and assembling work of PC blocks, improve the transportation efficiency, and securely and firmly connect the PC blocks to each other. To provide.

[0007]

SUMMARY OF THE INVENTION The present invention is a precast concrete block foundation used in a unit type building composed of a plurality of building units, wherein a footing portion is provided at a position where a predetermined column of the building unit is arranged. Installing a bundle base block having a plurality of blocks, and installing a cloth base block formed in a substantially plate shape with a size corresponding to the module size of the building unit between the bundle base blocks, and inserting a PC steel material formed in each block. Place the PC steel material through the hole and tighten it by tightening at the bundle base block part,
It is characterized in that each block is prestressed and each block is pressure-bonded and connected.

In the above, the bundle basic block is 4
In a general building unit having a pillar of a book, it may be installed under all the pillars, or, for example, when two building units are arranged adjacent to each other in the short side direction, outside of the building that is not adjacent to another building unit. It may be installed only under the pillar.

[0009]

According to the present invention as described above, the bundle base blocks are installed at predetermined pillar positions of the building unit, and the cloth base blocks are installed between the bundle base blocks. Then, the PC steel material is passed through the PC steel material insertion hole of each block, both ends of which are tension-tightened at the bundle base block portion, and each block is prestressed and crimped to be connected. Then, a predetermined pillar of the building unit is placed on the bundle foundation block and fixed to the foundation to complete the unit type building.

At this time, since the long cloth foundation blocks are formed in a substantially plate shape, they can be stacked and transported, and the transportation efficiency of the foundation 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 portion or a cross portion of the foundation, and the bundle foundation block and the cloth foundation block arranged between the bundle foundation blocks are arranged. Since the PC steel material is crimped as one unit, the PC steel material does not intersect at the corner portion or the cross portion of the foundation. Therefore, it is not necessary to produce a plurality of types of basic blocks having different height positions of the PC steel material insertion holes, and the production and management of the PC block and the on-site assembly are simplified. Further, since the bundle base block and the cloth base block are prestressed by the PC steel material and pressure-bonded, the respective base blocks are securely and firmly connected.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 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.
Block basis 3 is shown. PC block basics 3
Is a bundle base block 10 for corner portions of the foundation 3, a bundle base block 20 for cloth portions, and the building unit 1
Of the long side beams, which are formed according to the length of the long side beams and are arranged between the bundle base blocks 10 and 20, and the short side beams of the two building units 1 arranged in parallel. The fabric base block 40 on the short side is formed in a size corresponding to the length in the direction and is arranged between the bundle base blocks 10 and between the bundle base blocks 20.

The bundle base block 10 for corners is installed at the corners of the base 3 on which the cloth base blocks 30 and 40 are arranged orthogonally, and as shown in FIG. And a part 12. The projecting ridges 13 for joining are provided on the two side surfaces of the rising portion 12 to which the cloth base blocks 30 and 40 are joined. 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 stripe portion 13 is formed in this concave portion 14, respectively. There is. Further, as shown in FIG. 1, a brace insertion hole 16 into which a reinforcing brace 4 formed of a reinforcing bar or an iron wire is inserted is formed between the two side surfaces in which the PC steel material insertion hole 15 is formed. .. Further, an anchor bolt insertion hole 17 and a level adjusting bolt 18 are provided on the upper surface of the rising portion 12.

The bundle base block 20 for the cloth portion is shown in FIG.
As shown in FIG. 3, two cloth base blocks 30 and 40 are installed in the middle part on the long side of the foundation 3 where the cloth base blocks 30 and 40 cross each other. As shown in FIG. It is composed of a portion 21 and a rising portion 22. Cloth foundation blocks 30, 4 of bundle foundation block 20
The projecting ridges 23 for joining are respectively provided on the three side surfaces to which 0 is joined, while the PC steel material insertion hole 25 and the brace insertion hole are provided on the other side surface of the rising portion 22, that is, on the outside side of the foundation 3. A recessed portion 24 in which 26 is formed is provided. An anchor bolt insertion hole 27 and a level adjusting bolt 28 are provided on the upper surface of the rising portion 22.

The cloth foundation block 30 is a bundle foundation block 1.
As shown in FIG. 4, it is installed between 0 and 20, and 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. Recessed ridges 3 that fit into the ridges 13 and 23 of the
1 is formed. In addition, between the ridges 31, two Ps parallel to each other along the longitudinal direction of the cloth base block 30 are provided.
The C steel material insertion hole 32 is penetrated.

The cloth foundation block 40 is the bundle foundation block 1
It is installed between 0 and bundle basic blocks 20, respectively,
As shown in FIG. 5, like the cloth foundation block 30, it is formed in a plate shape with a predetermined dimension set by the module dimension of the short side of the building unit 1, and is provided with a recessed portion 41 and a PC steel material insertion hole 42. There is. Further, the central portion in the longitudinal direction is formed wider than the other portions, the sheath tube 43 is embedded therein, and the level adjusting bolt 44 is provided on the upper surface. The number of the sheath tubes 43 and the level adjusting bolts 44 is set by the number of columns of the building unit 1 installed in that portion, and the cloth foundation block 40 arranged in the central portion of the foundation 3 has four sheath tubes. 43 and level adjustment bolt 4
4 are provided.

In this embodiment as described above, as shown in FIG. 1, the bundle base block 10 is installed at a position below the pillar in the corner portion of the unit type building 2 composed of four building units 1 and is arranged in the longitudinal direction. The bundle base blocks 20 are installed at the positions below the pillars of the adjacent building units 1, and the cloth base blocks 30, 40 are installed between the bundle base blocks 10, 20. Next, as shown in FIGS. 6 and 7, the PC steel material insertion holes 15, 25, 25 of the respective base blocks 10, 20, 30, 40,
Insert the PC steel material 50 into 32 and 42, and bundle basic block 1
At the recesses 14 and 24 of 0 and 20, nuts 52 are screwed into the screws at the ends of the PC steel material 50 via the anchor plate 51 and tightened. By this tightening, the PC steel material 50 is tensioned and the bundle base blocks 10 and 20 and the cloth base block 3 are tightened.
Pre-stress is added to 0, 40, and each block 10, 2
0, 30, and 40 are pressure-bonded to each other and firmly connected.
As the PC steel material 50, PC steel wire, PC steel stranded wire, PC steel rod, unbonded PC steel material and the like 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 to form the recesses 14 of the blocks 10 and 20, respectively.
At the 24th portion, a nut 52 is screwed to the end of the brace 4 via an anchor plate 51 and tightened to reinforce the foundation 3. Then, the bottom end of each of the basic blocks 10 to 40 is filled with soil to a height such 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 unit 1 is placed on the assembled foundation 3 and fixed to the foundation 3 using anchor bolts 6 projecting from the lower ends of the pillars 5 of each unit 1. That is, as shown in FIGS. 8 and 9, bundle basic blocks 10, 2
0, 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, respectively, and the recesses 14 and 24 of the bundle base blocks 10 and 20 are inserted.
In, the building unit 1 is fixed to the foundation 3 by screwing the nut 53 onto the anchor bolt 6. On the other hand, on the cloth base block 40, as shown in FIG. 10, the sheath tube 43 embedded in the cloth base block 40 is filled with the grout agent 54, and then the anchor bolt 6 is inserted into the sheath tube 43. The building unit 1 is fixed to the foundation 3. In addition, the concave portion 1 of each bundle basic block 10, 20
After installation of the building unit 1, 4 and 24 fit and cover the cover 55.

As described above, the PC block foundation 3 and the first-floor living room portion of the unit-type building 2 are configured, and another building unit 1 is placed on the building unit 1 if necessary, so that the predetermined number of floors is reached. The unit type building 2 is constructed.

According to the present embodiment as described above, the PC block foundation 3 of the unit type building 2 is replaced by the plurality of bundle foundation blocks 1
0,20 and cloth foundation blocks 30,40, P
Since the pre-stress is applied to the bundle base blocks 10 and 20 sandwiching the cloth base blocks 30 and 40 by using the C steel material 50 for pressure bonding, the blocks 10 to 40 can be firmly connected and have sufficient strength. The base 3 can be assembled.

In consideration of the fact that it is the foundation 3 used in the unit-type building 2, a bundle foundation block 10, which has footing portions 11 and 21 under a predetermined column 5 portion to which a force is applied in the unit-type building 2, 20 is installed and the plate-like cloth base blocks 30 and 40 having no footing portion are installed between the bundle base blocks 10 and 20, so that particularly long cloth base blocks 30 and 40 are stacked. Therefore, it is possible to improve the transportation efficiency as compared with the conventional case in which only an inverted T-shaped PC block is used.

Further, one cloth foundation block 30, 40
P for each of the bundle basic blocks 10 and 20 which are arranged so as to sandwich
Since the C steel material 50 is provided, the PC steel material 50 is not cross-arranged. Therefore, it is not necessary to dispose the PC steel material insertion holes 15, 25, 32, 42 formed in each of the basic blocks 10 to 40 in the height direction so as to cross the PC steel material 50 in a three-dimensional manner. Therefore, the insertion holes 15, 25, 32, 42 of the respective basic blocks 10-40 can be easily formed, and the insertion holes 15, 25, 3 as the respective basic blocks 10-40 are formed.
Since it is not necessary to produce a plurality of types in which the height positions of 2, 42 are different, it is possible to improve the productivity of each of the basic blocks 10 to 40, and it is easy to manage and can be handled easily in the factory or on-site. it can.

Further, since the PC steel material 50 is tightened in the concave portions 14 and 24 which are opened on the outer peripheral side of the bundle base blocks 10 and 20, the tightening work can be performed from the outside of the base 3. Therefore, the workability at the time of installing the foundation 3 can be improved, and the inspection can be easily performed after the construction.

Further, in the connection between the building unit 1 and the foundation 3 in the bundle base blocks 10 and 20, the anchor bolt 6 is passed through the anchor bolt insertion holes 17 and 27 of the bundle base blocks 10 and 20, and the nut 53 is screwed. Since it is only necessary to fasten the building unit 1, it is possible to easily fix the building unit 1.

Further, the building unit 1 and the bundle basic block 1
Anchor bolt 6 and nut 53 are fixed to 0 and 20
Since each of the basic blocks 10 to 40 is connected by the PC steel material 50 and the nut 52, if the unit type building 2 needs to be removed, each nut 5 is connected.
By removing 2, 53 and the like, the building unit 1, the foundation 3, and the respective basic blocks 10 to 40 of the foundation 3 can be easily disassembled, and the unit-type building 2 can be removed in a short period of time. Further, since the foundation 3 is composed of the foundation blocks 10 to 40, the foundation 3 can be constructed more easily and in a shorter period of time than the foundation constructed by driving concrete on site. Also,
Since the building unit 1 produced at the factory is installed on the foundation 3 to construct the unit-type building 2, it is possible to reduce the on-site work and the construction period. Therefore, the unit type building 2 that can be easily constructed and removed in a short period of time can be constructed, and thus it is particularly suitable for a temporary building at a construction site, a disaster site, an event site, or the like.

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

It should be noted that the present invention is not limited to the above-described embodiments, 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 of the columns 5 of the building unit 1 are fixed to the cloth foundation block 40, but the bundle foundation blocks 10 and 20 are arranged under all the columns 5 of the building unit 1 to form the bundle foundation block 40. It may be fixed to the blocks 10 and 20. However, since the short side of the building unit 1 has a short dimension as in the above embodiment,
When about two building units 1 are arranged side by side in the short side direction, the force can be transmitted to the bundle base block 10 via the cloth base block 40 without providing the bundle base block at the joint portion thereof. It is also possible to support the blocks 40, which has the advantage that the number of basic blocks 10 to 40 can be reduced.

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

[0029]

As described above, according to the present invention, the production, management, and assembling work of PC blocks can be simplified, the transportation efficiency can be improved, and the PC blocks can be securely and firmly connected to each other. is there.

[Brief description of drawings]

FIG. 1 is a perspective view showing a PC block foundation 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 cloth portion of the present embodiment.

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

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

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

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

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

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

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

[Explanation of symbols]

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

Claims (1)

[Claims] 1. A precast concrete block foundation used for a unit-type building composed of a plurality of building units, the bundle foundation being installed at a position where a predetermined pillar of the building unit is arranged and having a footing portion. A block and a cloth base block which is arranged between these bundle base blocks and is formed into a substantially plate-like shape with a dimension corresponding to the module size of the building unit, and the bundle base block and The cloth foundation block is a PC placed through the PC steel material insertion hole formed in each block.
A precast concrete block foundation for a unit-type building, wherein steel materials are tension-fastened at the bundle foundation block portion and crimped and connected by prestress applied to each block.