JP2501164B2 - Unit type cloth foundation - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of constructing a cloth foundation used as a building foundation, and more particularly to a cloth foundation made of precast concrete.

[0002]

2. Description of the Related Art FIG. 52 shows a conventional cloth foundation 1
0 is shown. In the construction of the cloth foundation 10, first,
Abandoned concrete 3 is attached on the rubble stone 2 placed on the root cutting bottom 1 to determine the construction height. After assembling the reinforcing bar 5 and the formwork on the discarded concrete 3, concrete of the base portion (footing portion) 11 and the rising portion 12 is sequentially placed. At this time, an anchor bolt 13 such as a wall constructed on the foundation 10 is embedded. Then, after the top of the cloth foundation 10 is mortar-finished, a support member such as a wall is installed to start work on the upper part of the building.

[0003]

In the construction of such a cloth foundation, a considerable number of days and skill are required for setting the reinforcing bars and assembling the formwork. In recent years,
Due to lack of workers and skilled workers, it is difficult to maintain the accuracy and quality of the cloth foundation. Further, in the building, the construction period has been significantly shortened due to the prefabricated construction method and the like, and along with this, the construction period of the foundation is required to be shortened.

Therefore, in the present invention, in view of the above problems, a precast concrete (PC) can be used to easily construct a cloth foundation of good precision and quality,
Furthermore, it aims to realize a unit type cloth foundation that can shorten the construction period. Another object of the present invention is to provide a unit-type cloth foundation whose weight is reduced so that it can be easily carried on site. It is also an object of the present invention to provide a unit-type cloth foundation that can easily and firmly connect these unit-type foundations on site.

[0005]

A base having a base forming a footing of the present invention and a rising part raised above the base and connected to a plurality of other units to form a building foundation. In the unit type cloth foundation made of precast concrete with the unit shape of, the base is
It is provided with a plurality of side surface members that respectively configure both side surfaces of the base portion extending along the building foundation and a plurality of beam members that connect these side surface members, and a space for pouring concrete by these side surface members and the beam members. Is framed. Further, the height of the beam member is lower than that of the side member, and a groove-shaped space for setting a reinforcing bar is defined along the side member either above or below the beam member.

In the unit type cloth foundation of the present invention, when these are arranged so as to form a building foundation, a groove-shaped space is continuously formed in the extending direction of the building foundation, and a reinforcing bar is set in the groove-shaped space. it can. Furthermore, the building foundation can be constructed by pouring concrete into the space framed by the side members and the beam members. The unit type cloth foundations are firmly connected to each other by the reinforcing bars embedded in the groove-shaped space by the poured concrete, and the reinforcing bars improve the strength of the base. In the unit type foundation of the present invention, since the beam member and the side member are assembled in a formwork for pouring concrete, the unit type cloth foundation of the present invention is arranged, and in the space framed by the beam member and the side member. The building foundation can be constructed by pouring concrete. Therefore, it is not necessary to assemble the formwork using a control panel or the like at the site. In addition, since the poured concrete reaches the bottom of the base through the space framed by the side members and the beam members, if a sand layer is prepared in this part, the basic concrete can be applied at the same time.

In the unit type cloth foundation of the present invention, the base portion is constituted by the framed side member and beam member. Therefore, the unit type cloth foundation is light and easy to handle in the factory or on site. Further, when the rising portion is formed on the upper part of the beam member and supported by the beam member, the space under the rising portion also becomes a space into which concrete is poured, so that the weight of the unit type cloth foundation can be further reduced.

In order to prevent the reinforcing bars set in the groove-shaped space from being displaced by pouring concrete, it is desirable to attach a supporting metal member to the beam member for temporarily fixing the reinforcing bars. In particular, when the groove-shaped space is provided under the beam member, it is effective to keep the height of embedding of the reinforcing bar at a predetermined level.

In order to temporarily fix the unit type cloth foundations of the present invention in a state where they are adjacent to each other, at least one pair of beam members is connected to each other at the ends of the side member facing the unit to be connected. It is desirable to provide auxiliary beams arranged so as to communicate with each other, and to provide a joining means to be temporarily fixed to the auxiliary beams of the units connected to these auxiliary beams. Since the unit type cloth foundation of the present invention is lightweight, it is possible to arrange reinforcing bars,
Although the position may shift during the work of pouring concrete, it is possible to easily construct an accurate foundation by temporarily fixing it using the joining means.

In order to construct the foundation with high accuracy, it is important to connect the unit type cloth foundation of the present invention so as to be in close contact with each other. Therefore, in the unit-type cloth foundation of the present invention, among the lower end portions of the base portion facing the unit to be connected, the corner of the portion in contact with the ground is dropped for sand removal, and the sand remains between the adjacent base portions. I try not to.

Further, the rising portion of the unit type cloth foundation of the present invention has an upper projecting portion projecting toward the adjacent unit at an end portion on the side of the adjacent unit,
Alternatively, one of the lower protrusions formed by notching the upper portion of the rising portion is formed, and further, the upper protrusion is opened in the direction of the adjacent unit, and the first reinforcing rod protrudes inside.
Is formed, and a similar second recess is also formed in the upper portion facing the upper protruding portion of the rising portion following the lower protruding portion. Then, the upper protruding portion and the lower protruding portion are overlapped with each other to form a substantially continuous rising portion, and further, the first and second recesses form a space for connecting the reinforcing bars to each other. Therefore, if the unit type cloth foundations of the present invention are installed adjacent to each other, a continuous rising portion is formed, and the rising portion can be firmly connected by connecting the reinforcing bars protruding therein. In the space formed by the first and second recesses, it is possible to place a connecting metal piece for connecting the protruding reinforcing bars.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

[First Embodiment] FIG. 1 shows a building foundation formed of a unit type cloth foundation according to a first embodiment of the present invention. In this example,
The concrete flowing out from the unit-type cloth foundation forms the foundation concrete 17 on the cobblestone 2, and the unit-type cloth foundation having the inverted T-shaped cross section set at a predetermined level is arranged on the foundation concrete 17. , The building foundation is formed. The unit-type cloth foundation includes a unit S1 forming a straight line portion of the building foundation, a unit T forming a straight line portion and a T portion where the straight line portion intersects with the straight line portion, a unit L forming a corner portion, and a length of the straight line portion. It is divided into each unit such as the unit S2 for adjustment. Further, these units can be formed of precast concrete in a factory or the like. Each unit of this example has a groove 2 for setting the reinforcing bar 5 on the base portion 11 of the cloth foundation.
1 is formed. After the reinforcing bars 5 are set in the groove 21, concrete 15 is placed in the groove 21 on site. Further, in the unit of this example, the grooves 21 are formed on both sides of the base 11 with the rising portion 12 interposed therebetween.

Further, a box hole (anchor box) 31 for the anchor 13 is formed in each unit, and the anchor 13 is set in the box hole 31 and then filled with mortar. The joining part of each unit is the rising part 12
The upper protruding portion 32 and the lower protruding portion 33 are arranged so as to mesh with each other in the vertical direction. In addition, recesses 35 and 36 are formed in the upper protrusion 32 and the side surface 34 facing the upper protrusion 32,
Inside the space formed by these recesses 35, 36,
The reinforcing bars 5 are connected to each other by the connecting hardware 50. Further, after the anchor 13 is set through the center of the connecting hardware 50, the space is mortar-filled. On the upper part of the lower protrusion 33, the anchor box 3
1 has a groove 30 formed therein, and the recesses 35 and 3 are formed.
Simultaneously with the space formed in 6, the groove 30 is filled with mortar.

As described above, when the building foundation is formed by using the unit type cloth foundation of this example, it is possible to form the foundations of various buildings by using several kinds of units. Even if the base layout has a size that is not normally used, it can be handled by forming a unit for a straight line with a special size. Also, by supplementing with a fabric foundation that is cast in place, parts that cannot be handled by a unit Is also easy to replenish.

2 to 6 show a unit S1 which is a linear unit. This unit S1 includes a base 11 that forms the footing of the cloth foundation, and the base 11
And a rising portion 12 forming a waist wall formed substantially at the center of the upper part of the. And the base 11 is
The side member 22 that defines the height of the base 11, the auxiliary beam 23 that connects the side member 22 and the rising portion 12, and the side member 22 and the rising portion 12 in the middle of the unit S1.
It is constituted by a support beam 24 for connecting the.

The side member 22 is a member extending in the longitudinal direction of the unit S1 having a substantially rectangular cross section, and is arranged parallel to the rising portion 12 with a constant distance. Then, the unit S1 is set on the sand layer 4 or abandoned concrete with the side member 22 as the bottom surface. After the foundation is assembled, the reinforcing bar is set in the groove 21 formed by the member 22 and the rising portion 12. Then, the site concrete 15 is placed using the side surface member 22 as a formwork.

Further, in the unit of this example, the groove 2
A space 26 including the lower part of 1 and the lower part of the rising part 12 is formed. In the space 26, on-site concrete is poured at the same time as the groove 21. As described above, in this example, a space is formed in a portion where concrete can be poured without using a formwork, and the weight of the unit is reduced.

The auxiliary beams 23 are members extending in the cross-sectional direction of the unit S1 having a substantially square cross section, and each of the auxiliary beams 23 is connected to both ends of the rising portion 12 so that the ends of the side members 22 are connected to each other. Are formed in parallel. By this auxiliary beam 23, the rising portion 12 and the side surface member 22
Are connected to each other, and when the sand layer 4 or the discarded concrete is set, the side member 22 and the auxiliary beam 23 define the bottom surface of the unit S1. The rising portion 12 is supported by the side member 22 by the auxiliary beam 23 and a support beam 24 described later. On the other hand, when laterally holding the rising portion 12, the side member 22 is supported by the auxiliary beam 23 and the support beam 24.
Furthermore, this auxiliary beam 23 is adapted to contact an adjacent auxiliary beam of the foundation. Therefore, when the unit is set, sand or the like is likely to enter between the auxiliary beams, which makes it difficult to set with high accuracy. Therefore, the sand blaster 25 is formed by dropping the corners of the bottom portion of the auxiliary beam 23 so that such sand can be eliminated and set in close contact with the adjacent foundation.

The support beam 24 is a beam having substantially the same shape as the auxiliary beam 23, and connects almost the middle of the side member 22 and the rising portion 12. The beam 24 is a beam used for reinforcement when the unit is long, and can be omitted in the unit whose strength is a problem.

On the other hand, the rising portion 12 formed on the auxiliary beam 23 and the support beam 24 is a member having a rectangular cross section. At the end portion of the rising portion 12, the upper portion of one end portion is formed with an upper protruding portion 32 protruding in the direction of the adjacent base. At the other end, stand
A lower protruding portion 33 is formed by cutting out the upper portion of the rising portion 12 . The upper protrusion 32 has a shape in which only the wall surface is protruded, and a concave portion 35 is formed inside. The reinforcing bar 5 projects inside the recess 35. On the other hand, a recess 36 similar to the recess 35 is also formed at the other end 34 of the rising portion 12 facing the upper protrusion 32, and the reinforcing bar 5 also protrudes inside the recess 36. Further, an anchor box 31 for setting an anchor bolt is formed on the ceiling 37 of the lower protruding portion 33 that defines the bottom surface of the recess 36. The box 31 is formed such that the center thereof coincides with the position where the upper protrusion 32 and the end 34 are joined. Then, in the ceiling 37, the groove 30 is formed following the anchor box 31 along the direction in which the lower protrusion 33 extends. The groove 30 is filled with mortar at the same time when the space formed by the recesses 35 and 36 is filled with mortar, and the connection portion formed by the recesses 35 and 36 is strengthened.

Further, in the unit type cloth foundation of this example, a hole 40 having a substantially rectangular cross section is provided following the box 31 formed in the recess 36. This hole 40 is a concrete injection hole, and connects the concrete inflow space 26 prepared from the box 31 to the base 22.
Therefore, by using the concrete injection hole 40, concrete can be smoothly injected into the lower portion of the rising portion 12. Further, since it is cast integrally from the inflow space 26 of the base portion 22 to the concrete injection hole 40 prepared in the rising portion 12, the connection strength between the rising portion 12 and the base portion 22 can be improved.

An anchor box 31 is also formed in the upper surface of the rising portion 12 approximately in the middle of the ceiling 38.

This unit S1 includes recesses 35 and 36.
It can be easily laterally held by hanging a rope on the reinforcing bar 5 protruding to the side. In addition, when the strength is insufficient with only the reinforcing bar 5, it is possible to take measures such as overhanging the reinforcing bar for lateral holding in the ceiling 38 and embedding eyebolts.

Further, reinforcing bars 5 are embedded in the side members 22, the auxiliary beams 23, the support beams 24 and the upper portions of the rising portions 12, respectively, so that the strength is maintained. The reinforcing bar 5 of the rising portion 12 projects inside the recesses 35 and 36 as described above.

FIG. 7 shows a unit S2 which constitutes a straight line portion and is used at a position where the length is adjusted. The configuration of this unit is based on the unit S described above.
Since it is almost the same as 1, the overlapping portions are given the same numbers and their explanations are omitted. This unit is used as a unit that connects a T-type unit or an L-type unit, which will be described later, and the above-described linear unit S1. Therefore, the unit S is installed in the rising portion 12 of this unit.
Unlike 1, the upper protrusions 32 are formed at both ends. A recess 35 is formed in the upper protrusion 32, and the reinforcing bar 5 protrudes into the recess 35, as in the unit S1. The shape of the base portion 11 of this unit S2 is the same as that of the unit S1, but since the length of the unit is short,
Support beams are omitted. Moreover, the anchor box is not formed in the sky field 38.

8 to 11 show a unit T which forms a T-shaped portion where straight portions of the building foundation intersect with each other.
Is shown. In this unit, a hexagonal base 11 that is a combination of a rectangle and a trapezoid is formed, and a T-shaped crossing rising portion 12 is formed on the base 11. The rising portion 12 is composed of an extension portion 12a forming a waist wall in the extending direction of the building foundation and an intersection portion 12b intersecting the extension portion 12a at a right angle.

First, the base portion 11 is provided on the opposite side of the extension portion 12a from the intersection portion 12b, on the side member 22a arranged in parallel with the extension portion 12a, and on both sides of the intersection portion 12b.
Side members 22b arranged so as to connect the end of the extension 12a and the end of the intersection 12b, and further auxiliary beams 23a, 23b and support beams connecting the side members 22a, 22b and the rising portion 12 It is composed of 24a and 24b.

Similar to the side member in the unit S1,
Also in the unit T, the groove 21 for setting the reinforcing bar is formed on the auxiliary beam 23a and the support beam 24a by the side surface member 22a and the extension 12a of the rising portion 12 in the extending direction of the building foundation. On the other hand, in the intersecting direction of the building foundation, the intersection 12b and the side surface member 22 are provided in the area sandwiched by the intersection 12b and the extension 12a, respectively.
The groove 21 is formed on the auxiliary beams 23b and 23a and the support beam 24b by b or the extension portion 12a and the side member 22b. Then, the side members 22a and 22b
Also functions as a cast-in-place formwork. That is, the side members 22a and 22b form a space 26 in which concrete is poured at the site, and the space 26 also includes spaces under the extension 12a and the intersection 12b. .

The side members 22a and 22b are the extension 1
The both ends of 2a are connected by auxiliary beams 23a. The side members 22b are connected to each other at the ends of the intersections 12b by auxiliary beams 23b. These auxiliary beams 23a and 23b are used for the linear unit S1.
The auxiliary beam 23 has the same structure and function.

A sand blaster 25 is also formed at the lower ends of the auxiliary beams 23a and 23b, like the auxiliary beam 23.

The unit T is also provided with support beams 24a and 24b. The support beam 24a is installed in the middle of the extension 12a in the same manner as the support beam 24 of the unit S1 in order to support the side member 22a in the middle. In addition, in order to support the side surface member 22b, the support beam 22b is provided so that the middle portion of the side surface member 22b and the extension portion 12a.
And the lower portion 14 of the rising portion 12 where the intersecting portion 12b intersects are joined. The shape of each of the support members 24a and 24b is substantially the same as that of the support member 24 of the unit S1, and a description thereof will be omitted.

On the other hand, the rising portion 12 of the unit T
As described above, the extension portion 12a and the intersection portion 12b are formed so as to intersect each other at a right angle. This extension 12
At one end of a, like the unit S1, the lower protrusion 3
3 is formed, and an upper protrusion 32 is formed at the other end. In addition, recesses 35 and 36 are formed at each end. In this way, the configuration of the extension portion 12a is the same as that of the rising portion 12 of the unit S1, is given the same reference numeral, and description thereof is omitted.

Like the extension 12a, the intersection 12b intersecting the extension 12a at a right angle has a vertically long rectangular cross section, and the intersection 12b allows the cloth foundation to extend in a direction perpendicular to the extension 12a. A waist wall is formed. For this reason, the tip of the intersecting portion 12b is also processed for connecting to the linear unit S1 and the like, similar to the end portion of the extending portion 12a. In the unit T of this example, the intersection 1
A lower protrusion 33 is formed at the end of 2b. Then, in the upper portion of the lower protruding portion 33, like the end portion of the extension portion 12a, the recess 36, the reinforcing bar 5, the anchor box 31,
The groove 30 and the like are formed. Further, similarly to the unit S1, a concrete pouring hole 40 is prepared continuously with the anchor box 31 formed in the recess 36.
Also, in this unit T, the extension 12
An anchor box 31 is formed at a portion where a and the intersecting portion 12b are joined.

In the unit of this example, the lower protruding portion 33 is formed, but it goes without saying that a cloth foundation can be formed even if the upper protruding portion 32 is formed.

FIGS. 12 and 13 show a unit L forming the corner portion of the fabric foundation.

In the unit L of this example, the rising portion 12 is formed by two intersecting portions 12b intersecting at right angles. In addition, the base 11 is a pentagon in which one corner of a substantially square shape is cut off.
Two intersections 12b are formed on the upper part.

The above-mentioned base portion 11 has side surface members 22c intersecting at right angles and two side surface members 22b, 22b and 2b which form the side surface of the base portion sandwiched between the two intersecting portions 12b.
It is configured by an auxiliary beam 23c connecting 2c and support beams 24b and 24c. Side member 22c
Are arranged parallel to the intersecting portion 12b intersecting at a right angle, and the side surface member 22c forms an outer surface of the corner base of the cloth foundation. The side surface member 22b is a member that forms the side surface of the base portion inside the corner of the cloth foundation, and is arranged so as to connect the ends of the two intersecting portions 12b. Side member 2
The shapes of 2b and 22c are the same as those of the side member 2 of the unit S1.
It has almost the same shape as 2. Further, the side members 22b and 22c and the intersecting portion 12b form the groove 21 in which the reinforcing bar 5 is set on both sides of the intersecting portion 12b.

The auxiliary beam 23c is the auxiliary beam 2 of the unit S1.
A beam having substantially the same configuration as that of No. 3 is arranged at the end of the intersection 12b at a right angle to the intersection 12b. The beam 23c connects the side member 22c and the side member 22b. There is. Further, the auxiliary beam 23c is also joined to the bottom surface of the intersecting portion 12b, and like the auxiliary beam 23 of the unit S1, the auxiliary beam 23c allows the side members 22 to be separated.
b and 22c and the rising portion 12 are mutually supported. Further, the sand blasting 25 is formed on the auxiliary beam 23c as in the unit S1.

The support beam 24b is the support beam 24 of the unit T.
This support beam 24b connects the middle of the side member 22b to the intersecting bottom surface of the intersecting portion 12b in the same structure as b. Continuing on this support beam 24b, intersecting portion 12b
2 where the side member 22c intersects from the intersecting bottom surface
A support beam 24c is installed toward 7. Therefore, the side member 22c has one end supported by the auxiliary beam 23c and the other end supported by the support beam 24c.

In the base portion 11 as well, similar to the units S1, S2 and T described above, the side members 22b and 22c form a space in which on-site concrete is constructed. In addition to the groove 21 in which the reinforcing bars are set, this space includes the lower portion of the intersection 12b and the like.

As described above, the rising portion 12 of the main unit L is formed such that the two intersecting portions 12b are connected to each other at a right angle. The other end of each intersection 12b is processed to connect it to another unit, and in this example, the lower protrusion 3 is formed.
3 are formed. The lower protrusion 33 is provided with a recess 36, a reinforcing bar 5, an anchor box 31, a groove 30, a concrete injection hole 40, and the like, as in the units described above. The structure of each part is the same as that of the above-mentioned unit, the same reference numerals are given and the description thereof is omitted. Also,
An anchor box 31 is formed in the sky field 38 where the intersection 12b is connected.

When constructing a cloth foundation based on each unit described above, various special units may be required. Such a unit is realized by a combination of the units described above. it can. For example, an X-shaped unit X is required at a position where the cloth foundation intersects in an X shape, but the unit X can be formed in the same manner as the unit T. That is, the unit X may be any unit as long as the unit T is symmetrically connected to the center line of the extension 12a. Further, it is also possible to form only a specially shaped portion on site by assembling a mold.

14 to 16 show how a building foundation is made by the above unit. First, spread 3-5 cm of sand on leveling stone 2 for leveling,
Each unit is arranged on this sand layer 4. Each unit is arranged so that the lower protruding portion 33 and the upper protruding portion 32 of an adjacent unit are engaged with each other. Then, each end of the rising portion 12 of each unit and each auxiliary beam 23 of the base 11 are connected so as to be in close contact with each other. At this time, if sand or the like used for leveling enters between the adjacent auxiliary beams 23, it becomes difficult to adhere them, and accurate setting cannot be performed. Therefore, by providing the sand remover 25 on the auxiliary beams 23, This problem is solved (Fig. 14).

Although the installation level of each unit is determined by the sand layer 4, it may be difficult to adjust the fine height by adjusting the thickness of the sand layer 4. In such a case, a packer or the like may be inserted under the base 11, or a small jack or the like may be installed at one end of the base 11 to adjust the installation level.

With each unit connected in this way,
Reinforcing bar setting grooves 21 formed on both sides of each unit
Becomes a continuous groove 21. Therefore, by setting the reinforcing bars in the groove 21, reinforcing bars for reinforcing the base of the cloth foundation can be set, and at the same time, the unit type cloth foundation of this example can be firmly connected by these reinforcing bars. Further, since the level of the reinforcing bar 5 set in the groove 21 is kept constant by the auxiliary beam 23 and the supporting beam 24 formed between the auxiliary beams 23, the setting of the reinforcing bar 5 can be performed very easily. (Fig. 15).

The base portion of the cloth foundation is formed by constructing on-site concrete 15 in the set groove 21 of the reinforcing bar 5. That is, the side surface member 22 forming the groove 21.
Is the side surface of the base of the cloth foundation, so that by pouring concrete into the inside of this side surface, the base of the cloth foundation can be filled with concrete and the base can be completed. In this step, since the side surface of the base portion has already been formed by the unit type fabric foundation, it is not necessary to newly form a formwork for placing concrete on site, and the fabric foundation can be completed in a short time. And
Since the shape of the cloth foundation is already formed of precast concrete, the cloth foundation can be easily constructed even by a skilled worker who has conventionally been required for on-site construction.

Further, in the unit type cloth foundation of this example, the on-site concrete 15 poured into the groove 21 penetrates into the sand layer 4 laid for leveling. For this reason,
A foundation concrete layer 17 is formed on the sand layer 4. Since this foundation concrete layer 17 is integrated with the rubble stone 2 that supports the unit type cloth foundation, it generally fulfills the same function as waste concrete when constructing the cloth foundation. Therefore, the unit type cloth foundation of the present example can omit the step of applying the discarded concrete, and by applying the on-site concrete to the groove 21, the level of the cloth foundation can be stabilized. . Further, the basic concrete layer 17 is formed integrally with the cobblestone 2, and the basic concrete layer 17 is also integrated with the concrete layer in the groove 21 forming the base of the cloth foundation. Therefore, in the unit type cloth foundation of the present example, by injecting the on-site concrete 15 into the groove 21, the rubble stone 2, the foundation concrete layer 17 and the base are integrated,
It becomes possible to form a stable foundation.

The anchors 13 set in the anchor boxes 31 are fixed by the mortar filled in the boxes 31. At the same time, anchor box 3
Since on-site concrete can be poured to the base through the concrete inflow hole 40 subsequent to 1, it is possible to construct a stable foundation (FIG. 16).

17 to 19 show a part of the building foundation formed by the above method.

The places shown in these figures are the places where the unit S1 and unit T of FIG. 1 are connected. In the rising portion of the cloth foundation, the upper protrusion 32 of the unit S1 overlaps the upper portion of the lower protrusion 33 of the unit T, and
The recess 35 of 1 and the recess 36 of the unit T are closely connected to each other so as to form one box. On the other hand, at the base of the cloth foundation, the auxiliary beam 23 of the unit S1 and the auxiliary beam 23a of the unit T are closely connected so as to face the sand removing devices 25.

The bases of these units are set so that the height of the bottom surface of the base is on the basic concrete layer 17 formed on the upper part of the quarry stone 2. For this reason,
The groove 21 formed by the side member 22 of the unit S1 and the rising portion 12 and the groove 21 formed by the side member 22b of the unit T and the extension 12a are continuously connected. In addition, the side member 22a and the extension 12 of the unit T
The groove 21 formed by a also becomes continuous with the side member 22 of the unit S1 and the groove 21 formed by the rising portion 12. Groove 2 formed continuously in this way
After the reinforcing bars 5 are set in No. 1, the on-site concrete 15 is installed in the grooves 21, so that the units S1 and T
Has its base firmly fixed. And this groove 21
The concrete 15 poured into the space also fills the space 26 including the lower part of the rising portion 12 shown in FIG.
The base of the cloth foundation is completed with the side members 22, 22a, 22b as the side surfaces.

On the other hand, in the rising portion, the depression 35
The reinforcing bar 5 projecting to the bottom and the reinforcing bar 5 projecting to the recess 36 are connected by a connecting metal piece 50. Therefore, the unit S
Sufficient strength is maintained even at the rising portion of the cloth foundation constituted by 1 and the rising portion of the unit T. The connection hardware 50 is installed inside the box formed by the recesses 35 and 36. Then, through the center of the connecting hardware 50, the lower protruding portion 3 of the unit T is
The anchor 13 is set in the anchor box 31 provided in the sky field 37 of No. 3, and the space formed by the recesses 35 and 36 and the box 31 are filled with the mortar 16. At the same time, the groove 30 is also filled with the mortar 16, and the space formed by the recesses 35 and 36 and the lower protrusion 33 can be connected by a continuous mortar.

The anchor 13 is also set in the anchor box 31 formed in the ceiling 38, and the mortar 16 is filled inside the box 31. Further, through the concrete inflow hole 40 formed in the recess 36,
Since the rising portion and the base portion are connected by the site concrete 15, it is possible to improve the connection strength between the rising portion and the base portion.

In this example, although the description is based on the unit type cloth foundation in which the rising portion and the base portion are integrally formed, the rising portion and the base portion are separately formed for transportation and the like. It is also possible to integrate them when constructing the foundation. In such a case, it is possible to strengthen the connection strength between the rising portion and the base portion by using the concrete inflow hole 40, and if necessary, insert a reinforcing bar into the concrete inflow hole 40 to increase the strength. You can also plan.

20 to 23 show the connection metal piece 50 used above. Connection hardware 50 of this example
Is composed of an inner cylinder 60 into which the reinforcing bar 5 is inserted from both ends, and an outer cylinder 70 for tightening the inner cylinder 60,
It is used not only for connecting the unit type cloth foundation of this example, but also for connecting general reinforcing bars.

The inner cylinder 60 has a cylindrical shape and is tapered so as to be gradually narrowed from the center 62 toward both ends 61 thereof. A hole 63 is formed in the center 62 through the inner cylinder 60 so as to be perpendicular to the central axis of the inner cylinder. This hole 63 allows the inner cylinder 63 to be temporarily fixed when tightening the outer cylinder 70 toward the center 62 of the inner cylinder. Furthermore, in the unit cloth foundation of this example, this hole 63 is used. Anchors can be installed through 63. Then, the center 62 should not interfere with the hole 63.
A thin gap 64 is formed in the vicinity of the both ends 61. The gaps 64 are formed at two locations symmetrically in the radial direction of the cylinder so that the end portion 61 of the inner cylinder can be deformed toward the central axis. The inner surface 65 of the inner cylinder 60 is machined to have an inner diameter slightly larger than the outer diameter of the reinforcing bars inserted from both ends. And, in the vicinity of the end portion 61 of the inner surface 65,
Concavities and convexities 66 are formed so as to mesh with the reinforcing bars.

On the other hand, the outer cylinder 70 has a triangular pyramid shape with its tip cut, and two outer cylinders 70 are provided for one connecting metal piece.
A and 70b are set from both ends of the inner cylinder 60. The inner surface 71 of the outer cylinder 70 is processed into a shape substantially similar to the taper processing applied to the inner cylinder 60, and when the outer cylinder 70 is set toward the center 62 of the inner cylinder 60, the outer cylinder 70 is formed. The inner surface 71 of the inner cylinder 71 compresses the end portion 61 of the inner cylinder 60 so that the inner cylinder 71 is deformed inward. An edge 72 is formed at the end of the outer cylinder 70 toward the center 62. When tightening the outer cylinder 70 toward the center 62, the edges of the outer cylinders 70a and 70b set from both ends are set. 7
It is possible to pull the two together or to hit the edge 72 to tighten it.

In the connection hardware 50 composed of the inner cylinder 60 and the outer cylinder 70, the outer cylinder 70 has the center 62.
When it is set toward, the end portion 61, which is deformable by the gap 64, is deformed toward the central axis direction of the inner cylinder 60. Therefore, the reinforcing bar 5 inserted from the end portion 61 is fixed to the inner cylinder 60 by being tightened by the inner surface of the end portion 61. That is, the end portion 61 meshes with the reinforcing bar 5 and the outer cylinder 70 like a wedge and is fixed to each other. Therefore, the reinforcing bars 5 inserted into both ends 61 of the inner cylinder 60 are connected to each other via the inner cylinder 60. In addition, the inner surface 65 of the inner cylinder 60 has an uneven surface 66 with which the reinforcing bar 5 is meshed.
Is formed so that sufficient connection strength between the inner cylinder 60 and the reinforcing bar 5 can be secured. Furthermore, it is possible to form the unevenness on the inner surface of the outer cylinder 70 and the outer surface of the inner cylinder 60 to fix the outer cylinder 70 at a position where a predetermined holding force for the reinforcing bar 5 can be secured.

FIG. 24 shows how the above-described connecting hardware 50 is used in the unit type cloth foundation of this embodiment. The recess 3 formed in the rising portion 12 of the unit
The reinforcing bars 5 projecting inside 5 and 36 are inserted into both ends of the connecting hardware 50, and the inner cylinder 6 is inserted by the outer cylinder 70.
They are connected by tightening 0. Then, the anchor 13 is set through the hole 63 formed at the center of the connecting hardware 50. This anchor 13
Are inserted in the anchor box 31 formed at the bottom of the recess 36. The connection hardware 50 and the anchor 13 are finally fixed by filling the space defined by the recesses 35 and 36 and the anchor box 31 with mortar.

Thus, in the connection hardware of this example,
Reinforcing bars can be easily connected only by fitting the outer cylinder into the inner cylinder. Therefore, special welding for connecting the reinforcing bars is not necessary, and the time for binding the reinforcing bars can be shortened. Therefore, the connecting hardware of this example is optimal for connecting a unit foundation or the like, and it is possible to shorten the construction period or the number of skilled workers even in ordinary rebar construction.

Example 2 FIG. 25 shows a building foundation made using the unit-type cloth foundation according to Example 2. In this example, Kuriishi 2
The set level of the cloth foundation is set by the discarded concrete 3 constructed on the above, and the unit type cloth foundation is arranged on the discarded concrete 3 to form the building foundation. Also in the unit type cloth foundation of this example, the building foundation is a unit S′1 forming a straight line portion, a unit T ′ forming a straight line portion and a T portion where a straight line portion intersects a straight line portion, and a unit L ′ forming a corner portion. , And a unit for adjusting the length of the straight line portion S′2 and the like, and these units are made of precast concrete in a factory or the like. A groove 21 for setting the reinforcing bar 5 is also formed in the base portion 11 of each unit of this example,
After the reinforcing bars 5 are set in the grooves 21, concrete 15 is poured on site. However, in the unit type cloth foundation of this example, unlike the first embodiment, the reinforcing bar is installed from below the cloth foundation. The shape of each unit will be described below. In addition, in the same configuration as that of the first embodiment, each drawing is given the same reference numeral, and the description thereof is omitted.

26 to 29 show a unit S'1 which is a unit of a straight line portion. This unit S '
1 is composed of a base portion 11 that forms the footing of the cloth foundation, and a rising portion 12 that forms a waist wall that is formed substantially in the center above the base portion 11. The base 11 includes a side member 22 that defines the height of the base 11, and an auxiliary beam 4 that connects the side member 22 and the rising portion 12.
1, the support beam 43 connecting the side member 22 and the rising portion 12 in the middle of the unit S′1, and further the rising portion 1
It is composed of an auxiliary member 42 formed in the lower part of 2. The side member 22 is the same as in the first embodiment, and its description is omitted. In this example, the auxiliary beam 41 and the support beam 43 are connected to the upper portion of the side member 22, so that the side member 22, the auxiliary beam 41, and the support beam 43 define the upper surface of the base of the cloth foundation. It has become. Then, on-site concrete is poured into the space 26 defined by the side member 22. On the other hand, the groove 21 in which the reinforcing bar is set is formed below the auxiliary beam 41 and the support beam 43. That is, an auxiliary member 42 installed below the intersection of the rising portion 12 and the auxiliary beam 41 to support the rising portion 12,
A groove 21 is formed by the side surface member 22. Then, as will be described later, a reinforcing bar is set in the groove 21 from below. In this way, the unit S′1 is set on the discarded concrete 3 with the side surface member 22 and the auxiliary member 42 as the bottom surface.

The auxiliary beams 41 of this embodiment are members extending in the lateral direction of the unit S'1 having a substantially square cross section similar to that of the first embodiment, and the auxiliary beams 41 are provided at both ends of the rising portion 12. Are formed in parallel. Like the unit S1, the rising beam 12 and the side member 22 are connected by the auxiliary beam 41, but unlike the unit S1,
The auxiliary beam 41 defines the upper surface of the base 11 of the unit S′1. The rising portion 12 is formed on the auxiliary beam 41 and the support beam 43 described later. The auxiliary beam 41 is supported by the auxiliary member 42 below the rising portion 12. Further, the auxiliary beam 41 is formed with a bolt hole 44 to be temporarily fixed to the adjacent auxiliary beam of the foundation.

The auxiliary member 42 is a pillar member having a substantially square cross section formed at the intersection of the rising portion 12 and the auxiliary beam 41, and forms the bottom surface of this unit together with the side surface member 22. Therefore, at the lower part of the surface of the auxiliary member 42 in contact with the adjacent units, a corner is dropped like the surface of the side member 22 so that sand between the auxiliary beams can be eliminated at the time of setting so that the auxiliary members can be in close contact with each other. A sand blaster 25 is formed.

The support beam 43 is the same as the first embodiment except that it is set to a height that defines the upper surface of the base portion, and the description thereof will be omitted.

The rising portion 12 formed on the auxiliary beam 41 and the supporting beam 43 has the same structure as that of the first embodiment, and the upper protruding portion 32 and the lower protruding portion 33 are formed. Therefore, the same numbers as in the first embodiment are assigned and the description thereof is omitted. In this example, the anchor box is not particularly formed in the sky field 38 of the rising portion 12 and the sky field 37 below the recess 36. In the unit type foundation of this example, the upper structure is supported by setting a hole-in anchor or a chemical anchor in the ceiling 38.

FIG. 30 shows the unit S'2 used at the position where the length is adjusted. 31 and 32 show a T-shaped unit T'and FIG. 33 shows an L-shaped unit L '. With respect to the configuration of each unit, the same parts as those in the first embodiment are denoted by the same reference numerals and the description thereof will be omitted. In the unit of this example, similarly to the unit S′1 described above, the auxiliary beams 41 and the support beams 43 are installed so as to form the side surface member 22 and the upper surface of the base portion. An auxiliary member 42 is formed at a position where each auxiliary beam 41 and the rising portion 12 intersect. Further, the auxiliary beam 41 is formed with a bolt hole 44 for temporarily fixing it to an adjacent unit. The groove 21 for setting the reinforcing bar of each unit is formed by the side member 22 and the auxiliary member 42.
It is formed so that the lower part of the base is open.

34 to 37 show how the unit of this example forms a building foundation. First, the reinforcing bars 5 are temporarily placed on the abandoned concrete 3 where the building foundation is to be placed (FIG. 34).

Each unit is arranged on the rebar 5 temporarily placed according to the design. Each unit is arranged so that the lower protruding portion 33 and the upper protruding portion 32 of an adjacent unit are engaged with each other.

Then, a bolt 45 is inserted into the bolt hole 44 provided in the auxiliary beam 41 of each unit to temporarily fix the units to each other. If the weight of each unit is light, the position may shift when concrete is applied. Therefore, it is desirable to temporarily fix such a unit in order to form an accurate foundation. At this time, a temporary metal fitting 46 for temporarily mounting the reinforcing bar 5 using the bolt 45
Set. The temporary metal fitting 46 has a shape as shown in FIG. 38 and is used for holding the reinforcing bar 5 at a predetermined position when concrete is constructed. That is, the metal object 46 is composed of an upper bolt hole 47 and a holding hole 49 having a peripheral portion 48 lacking for passing the reinforcing bar 5, and the bolt hole 47 corresponds to the bolt hole 44 of the auxiliary beam 41. By setting the height to the holding hole 49, it is possible to hold the holding hole 49 at a constant height in the groove 21 for setting the reinforcing bar (FIG. 35).

Next, the reinforcing bars 5 temporarily placed on the discarded concrete 3 are set in the holding holes 49 of the temporary hardware 46 attached as described above. As a result, the reinforcing bar 5 is set at a predetermined position in the groove 21 (Fig. 36).

Then, on-site concrete 15 is constructed in the space 26 including the groove 21 in which the concrete formed at the base of the cloth foundation is poured. In this way, the base of the fabric base is formed and at the same time the units are firmly joined together. In this example, unlike the first example, the set level of the unit type cloth foundation is formed by the discarded concrete 3, and it is not necessary to form the foundation concrete layer. However, also in this example, by applying the on-site concrete 15 to the groove 21, the on-site concrete 1
5 and the discarded concrete 3 are closely formed,
As compared with a normal unit type foundation that is simply installed on the discarded concrete 3, it is possible to secure high strength without a problem such as a deviation from the supporting ground (FIG. 37).

The unit type cloth foundation of this example is also the same as that of the first embodiment in that sand removal is possible and a mold is not required.

39 and 40 show cross sections of the joint portion of the cloth foundation constructed as described above. FIG. 39
Shows a cross section of a joint between the bases of the unit S′1 and the unit T ′. As can be seen in this figure, first, the auxiliary beams 41 and 41a of the unit S'1 and the unit T '
Are fixed by bolts 45 for temporary fixing. And
The reinforcing bar 5 is fixed to the middle set level of the base 11 by the temporary metal fitting 46 attached at the same time by the bolt 45. In this way, the units are joined and concrete is poured into the space at the base of each unit. Therefore, the base portion 11 of the cloth foundation can be formed by connecting the base portions of the units so as to be integrated.

On the other hand, the rising portion 12 of the cloth foundation is shown in FIG.
As shown in 0, in the space formed by the recesses 35 and 36 in the upper portion of the lower protruding portion 33, they are connected by the reinforcing bar connecting hardware 51. Finally, the space is filled with mortar 16 to form a sufficiently strong cloth foundation.

41 to 44 show the connection metal piece 51 used above. Connection hardware 51 of this example
Also comprises an inner cylinder 80 into which the reinforcing bar 5 is inserted from both ends, and an outer cylinder 90 for tightening the inner cylinder 80,
It is used not only for connecting the unit type cloth foundation of this example, but also for connecting general reinforcing bars.

The inner cylinder 80 has a cylindrical shape, and the outer surface 83 thereof has a threaded taper so that the inner cylinder 80 is gradually tapered from the center 82 toward both ends 81 thereof. Further, the inner cylinder 80 has two parts 80a along the central axis of the cylinder.
And 80b.

Further, the inner surface 85 of the inner cylinder 80 is formed with unevenness 86 so as to mesh with the reinforcing bar 5, and the inner diameter of the inner cylinder 80 is such that when the reinforcing bar is sandwiched between the two parts 80a and 80b. , A slight gap 84 is set to open.

On the other hand, the outer cylinder 90 has a triangular pyramid shape with the tip cut, and two outer cylinders 90 are provided for one connecting metal piece.
a and 90b are set from both ends of the inner cylinder 80. A female screw is cut on the inner surface 91 of the outer cylinder 90 so as to mesh with the taper-shaped screw formed on the inner cylinder 80. Further, the angle of the taper is determined by adjusting the outer cylinder 90 to the center of the inner cylinder 80. When the inner cylinder 80 is screwed in toward 82, the inner cylinder 80 is formed so that the inner cylinder 80 is compressed in the central axis direction. Further, a hexagonal edge 92 is formed at an end portion of the outer cylinder 90 facing the center 82, so that the outer cylinder 90 can be easily rotated by a spanner or the like.

In the connection metal piece 51 constituted by the inner cylinder 80 and the outer cylinder 90, when the outer cylinders 90a and 90b are screwed toward the center 82, they are formed by the two parts 80a and 80b of the inner cylinder. Due to the gap 84, the inner cylinder 80 moves in the axial direction of the inner cylinder 80 so as to compress the reinforcing bars 5. Therefore, the reinforcing bar 5 inserted from the end portion 81 is tightened by the inner surface 85 of the inner cylinder, and is fixed to the inner cylinder 80. Therefore, the reinforcing bars 5 inserted into both ends 81 of the inner cylinder 80 are connected to each other through the inner cylinder 80. Further, since the outer cylinder 90 is screwed to the inner cylinder 80, the outer cylinder 90 does not shift from a predetermined position. In the connection hardware of this example, no hole is formed at the center of the inner cylinder, but it is of course possible to form a hole at the same position as in Example 1.

In the above-mentioned embodiment, all the grooves for setting the reinforcing bars are formed in the base portion, but in the foundation where the width of the rising portion can be sufficiently secured, the groove for setting the reinforcing bars also in the rising portion. Can be formed. In addition, it is possible to connect the reinforcing bars in the groove with a reinforcing bar connecting metal piece.

[Embodiment 3] FIG. 45 shows a building foundation constructed by using the unit type cloth foundation according to the third embodiment. In this example, as in the case of Example 2, the foundation is formed by arranging the units on the discarded concrete 3 constructed on the rubble stone 2. The cross section of the unit type cloth foundation of this example is substantially L-shaped, unlike the inverted T-shape of Examples 1 and 2, and is used when footing cannot be taken on both sides of the rising portion. The shape. Then, the upper surface of the base portion 11 is formed so as to be inclined toward the outside of the foundation. Further, in this example, joints 101 are formed vertically and horizontally on the side surface of each unit SL, LL, etc., as shown in FIG. The joint 101 is formed so that the connecting line 102 formed on the side surface when the units are connected to each other becomes a part of the geometric pattern. For this reason, the connecting line 102 between the units cannot be distinguished from the geometric pattern, so that when the connecting line 102 needs to be hidden, it is possible to omit mortar or the like that is installed on the side surface. In this example, the joint 101 forms the geometric pattern, but it is of course possible to form the pattern using tiles or the like.

Further, in the unit type cloth foundation of this example, the rising portion for connecting the adjacent cloth foundations has a long recess 35 'in the lateral direction along the foundation as compared with the first and second embodiments. , 36 'are prepared. Therefore,
Reinforcing bars can be bound together inside the recesses 35 'and 36', and the unit type cloth foundation of the present example can be connected to the adjacent unit type cloth foundation without using a connecting hardware. Further, as in the first embodiment, the groove 30 is formed in the ceiling 37 of the lower protrusion 33, and the space formed by the depressions 35 ′ and 36 ′ and the lower protrusion 33 are formed by continuous on-site concrete. The connection is strengthened by connecting them.

47 and 48 show the structure of the unit SL forming the straight line portion of this example. In the unit type cloth foundation of this example, the groove 21 is formed downward so that the reinforcing bar is set from below the base portion 11 as in the second embodiment. The groove 21 is in one row and is formed so as to partially cover the intersection of the base 11 and the rising portion 12 connected to the L-shape. Also, the base 1
The auxiliary beam 41 defining the upper surface of 1 and the upper surface of the support beam 43 are formed to be inclined so as to flow to the side opposite to the rising portion 12. Almost the same as in the second embodiment, the auxiliary beam 41 has substantially the same center as that of the second embodiment in that the temporary metal fittings of the reinforcing bar are set and the bolt holes 44 for the purpose of temporarily fixing the unit are formed. And the description is omitted.

The rising portion 12 of the unit of this example is substantially the same as that of the second embodiment, but a plurality of cylindrical anchor holes 39 are formed in the ceiling 38 of the unit of this example. The anchor hole 39 can be formed by setting a sleeve or the like at an arbitrary position when precasting the unit. And by each building,
When the position of the anchor is different, it can be dealt with by changing the position of the anchor hole 39 without changing the shape of the unit, and it becomes easy to engage with the building formed in the upper part. ing. As the shape of the anchor hole, various shapes such as a box shape and a spiral shape can be used.

Further, the recesses 35 'and 36' formed in the rising portion 12 are formed long in the extending direction of the rising portion in order to hold the length for binding the reinforcing bars 5. A groove 30 is provided on the upper portion of the lower protrusion 33 to enhance the connection strength. The other parts of the unit are the same as those in the second embodiment and are assigned the same numbers, and the description thereof is omitted.

FIGS. 49 and 50 show the structure of the unit LL constituting the corner of this example. Also in the unit of this example, a groove 21 having an opening at the bottom, in which a reinforcing bar can be set from below, is formed as in the second embodiment. The upper surface of the base defined by the auxiliary beam 41c and the support beam 43b is formed with an inclined surface so as to flow to the side opposite to the rising portion 12. In the corner portion of this example, a slope is formed up to the middle of the upper surface of the support beam 43b so that a slope having a constant width can be secured. Further, joints 101 that form a geometric pattern that is continuous with the unit SL are also formed on the side surfaces of the unit LL that forms the corner. An anchor hole 39 is formed at an arbitrary position on the ceiling 38 of the rising portion 12. Further, also in this unit, a recess 36 'that is longer in the extending direction of the rising portion 12 is formed as compared with the first and second embodiments. In addition, a groove 30 is formed in the upper portion of the lower protrusion 33 along the extending direction of the lower protrusion 33. The other parts are almost the same as those in the second embodiment, the same reference numerals are given, and the description is omitted.

FIG. 51 shows a method of connecting the rising portions 12 of the unit type cloth foundation of this example. In the unit type cloth foundation of this example, the reinforcing bar connecting hardware is not used, but the reinforcing bars 5 are connected to each other using the auxiliary reinforcing bars 6. That is,
The auxiliary reinforcing bars 6 are bound to the reinforcing bars 5 by using the binding wires 7, and the reinforcing bars 5 facing each other are further bound by the binding wires 7. In order to perform this binding, in the unit type cloth foundation of this example, the recesses 35 'and 36' are formed long along the extending direction of the rising portion 12. in this way,
The unit type cloth foundation of this example can be connected without using the connecting hardware by using the auxiliary reinforcing bar 6. In addition,
In this example, in consideration of transportation and the like, since the reinforcing bar 5 is adjusted to a length that can be accommodated in the recesses 35 'and 36', the auxiliary reinforcing bar 6 is used, but the length of the reinforcing bar 5 is increased. It is of course possible to connect the reinforcing bars 5 to each other.

As described above, as the unit type cloth foundation, various shapes can be formed for each of the base portion and the rising portion. From these, a shape suitable for the conditions of the building and the site is selected. Can be used. In addition, the position of the anchor, which is the part to be attached to the building to be installed on the upper part of the foundation, can be adjusted by forming an anchor hole at any position when precasting the unit without changing the shape of the unit. It is possible. Then, by actively designing the outer surface of the unit cloth foundation by using the joint portion between the units, it becomes possible to easily construct a foundation having an excellent appearance.

[0091]

As described above, the base portion of the unit type cloth foundation according to the present invention is framed by the side member forming the side surface thereof and the beam member connecting them.
A space for pouring concrete is formed. Therefore, the unit type cloth foundation of the present invention is very light and easy to handle in the field. Further, in the base portion, a groove-shaped space in which a reinforcing bar can be set is defined above or below the beam member. Therefore, when the unit type cloth foundations of the present invention are arranged according to the design of the building foundation, the groove for setting the reinforcing bar is formed along the building foundation, and the reinforcing bar is arranged in this groove and the concrete is poured to complete the building foundation. The reinforcing bars embedded in the poured concrete strengthen the foundation and at the same time firmly connect the unit type fabric foundations. Further, since the outer shape of the base is framed by the side member and the beam member, it is not necessary to assemble a mold on site. Furthermore, since the concrete poured into the base is integrated with the sand layer laid under the unit-type cloth foundation, the function of basic concrete can be applied at the same time. in this way,
The unitary cloth foundation of the present invention is light and easy to connect,
Furthermore, since no formwork is required, the construction period for foundation work can be greatly shortened. Further, by arranging the precast units side by side and injecting concrete, an accurate cloth foundation can be easily constructed, so that no skill is required and the burden and cost of the local workers can be reduced. Setting the reinforcing bar to the beam member makes it easier to set the reinforcing bar,
Also, connecting means for temporarily fixing the units to each other,
The building foundation can be constructed more accurately by dropping the corners of the lower end of the base for sand removal.

In addition, in the unit type cloth foundation of the present invention, by providing an upper protruding portion or a lower protruding portion at the end of the rising portion and further providing a recess in which the reinforcing bar protrudes inward, the inside of the unit type cloth foundation is A space can be secured to connect the reinforcing bar to. Therefore, the reinforcing bars of the rising portion can be bound together by a connecting metal fitting or the like, and the unit type cloth foundations can be connected more firmly.

[Brief description of drawings]

FIG. 1 is an outline view showing a part of a building foundation formed by using a unit type cloth foundation according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing an outer shape of a unit S1 forming a linear portion of the building foundation according to the first embodiment.

FIG. 3 is a side view showing a lateral side surface of the unit S1 shown in FIG.

FIG. 4 is a side view showing a side surface in a longitudinal direction of the unit S1 shown in FIG.

FIG. 5 is a plan view of the unit S1 shown in FIG. 2 as seen from above.

6 is a cross-sectional view showing a cross section in the lateral direction of the unit S1 shown in FIG.

FIG. 7 is a perspective view showing an outer shape of a unit S2 that constitutes a linear portion of the building foundation according to the first embodiment.

FIG. 8 is a perspective view showing an outer shape of a unit T that constitutes a T-shaped portion of the building foundation according to the first embodiment.

9 is a side view showing a side surface of the unit T shown in FIG.

10 is a plan view of the unit T shown in FIG. 8 as seen from above.

11 is a cross-sectional view showing a cross section of the unit T shown in FIG.

FIG. 12 is a perspective view showing an outer shape of a unit L that constitutes a corner portion of the building foundation according to the first embodiment.

FIG. 13 is a plan view of the unit L shown in FIG. 12 viewed from above.

FIG. 14 is an explanatory diagram showing the arrangement of the units in the construction order of the unit foundations according to the first embodiment.

FIG. 15 is an explanatory diagram showing a reinforcing bar set in the construction order of each unit foundation according to the first embodiment.

FIG. 16 is an explanatory diagram showing the place where concrete is poured on site in the construction order of the unit foundations according to the first embodiment.

FIG. 17 is an explanatory diagram showing a part of the connected portion of each unit according to the first embodiment.

18 is a cross-sectional view showing a cross section of a rising portion of the connection portion shown in FIG.

FIG. 19 is a cross-sectional view showing a cross section of the base portion of the connection portion shown in FIG.

FIG. 20 is a perspective view showing an outer shape of a connecting metal piece of a reinforcing bar used in Example 1.

FIG. 21 is a development view showing components constituting the connection hardware shown in FIG. 20.

22 is an explanatory diagram showing the operation of the connection metal piece shown in FIG. 20. FIG.

FIG. 23 is a cross-sectional view showing a cross section of the connecting metal article shown in FIG. 20.

FIG. 24 is an explanatory diagram showing a state in which the units according to the first embodiment are connected using the connection metal piece shown in FIG. 20.

FIG. 25 is an outline view showing a part of a building foundation formed using the unit type cloth foundation according to the second embodiment of the present invention.

FIG. 26 is a perspective view showing an outer shape of a unit S′1 that constitutes a linear portion of a building foundation according to a second embodiment.

27 is a side view showing a side surface of the unit S′1 shown in FIG. 26. FIG.

28 is a cross-sectional view showing a cross section in the longitudinal direction of the unit S′1 shown in FIG. 26.

29 is a cross-sectional view showing a cross section in the lateral direction of the unit S′1 shown in FIG.

FIG. 30 is a perspective view showing an outer shape of a unit S′2 that constitutes a linear portion of the building foundation according to the second embodiment.

FIG. 31 is a perspective view showing the outer shape of a unit T ′ that constitutes the T-shaped portion of the building foundation according to the second embodiment.

32 is a sectional view showing a section of the unit T ′ shown in FIG. 31. FIG.

FIG. 33 is a perspective view showing an outer shape of a unit L ′ that constitutes a corner portion of the building foundation according to the second embodiment.

FIG. 34 is an explanatory diagram showing how reinforcing bars are temporarily placed on abandoned concrete in the construction order of the unit foundations according to the second embodiment.

FIG. 35 is an explanatory diagram showing a state in which the units are arranged and temporarily fixed in the construction order of the unit foundations according to the second embodiment.

FIG. 36 is an explanatory view showing a place where a reinforcing bar is set in the construction order of each unit foundation according to the second embodiment.

FIG. 37 is an explanatory diagram showing the place where concrete is poured on site in the construction order of the unit foundations according to the second embodiment.

FIG. 38 is a temporary hardware for temporary installation of reinforcing bars used for construction of the unit according to the second embodiment.

FIG. 39 is a cross-sectional view showing a cross section of the base of the connected portion of the unit according to the second embodiment.

FIG. 40 is a cross-sectional view showing a cross section of a rising portion of a connected portion of the unit according to the second embodiment.

FIG. 41 is a perspective view showing an outer shape of a connecting metal piece of a reinforcing bar used for connecting a rising portion of a unit of Example 2;

FIG. 42 is a development view showing components constituting the connection hardware shown in FIG. 41.

FIG. 43 is an explanatory diagram showing the operation of the connecting metal piece shown in FIG. 41.

44 is a cross-sectional view showing a cross section of the connecting metal article shown in FIG. 41.

FIG. 45 is an outline view showing a part of a building foundation formed using the unit type cloth foundation according to the third embodiment of the present invention.

46 is a side view showing a geometric pattern formed on the outer surface of the cloth foundation shown in FIG. 45. FIG.

FIG. 47 is a perspective view showing the outer shape of a unit SL that forms a straight line portion of the building foundation according to the third embodiment.

48 is a side view showing a side surface of the unit SL shown in FIG. 47. FIG.

FIG. 49 is a perspective view showing an outer shape of a unit LL that forms a corner portion of the building foundation according to the third embodiment.

50 is a side view showing a side surface of the unit LL shown in FIG. 49. FIG.

FIG. 51 is an explanatory view showing the manner in which unit cloth foundations are connected using auxiliary reinforcing bars.

FIG. 52 is an outline view showing a part of a conventional cloth foundation.

[Explanation of symbols]

 1 Root cutting base 2 ・ ・ ・ Kuriishi 3 ・ ・ ・ Waste concrete 4 ・ ・ ・ Sand layer 5 ・ ・ ・ Reinforcing bar 6 ・ ・ ・ Auxiliary rebar 7 ・ ・ ・ Binding wire 10 ・ ・ ・ Cloth foundation 11 ・ ・ ・Base 12 ... Rise 13 ... Anchor 15 ... Site concrete 16 ... Mortar 17 ... Basic concrete layer 21 ... Reinforcing bar setting groove 22 ... Side member 23 ... Auxiliary Beam 24 ... Support beam 25 ... Sand blast 26 ... Concrete inflow space 30 ... Groove 31 ... Anchor box 32 ... Upper protrusion 33 ... Lower protrusion 34 ... Ends of rising portion 35, 36 ... Recess 37, 38 ... Top 39 ... Anchor hole 40 ... Concrete inflow hole 41 ... Auxiliary beam 42 ... Auxiliary member 43 ... Support Beam 44 ... Bolt holes 45 ... Bolts 46 ... Temporary hardware 47 ... Bolt holes 48 ... Notches 49 ... Holding holes 50, 51 ... Connection hardware 60, 80 ... Inner cylinder 61 , 81 ... Ends 62, 82 ... Center 63 ... Holes 64, 84 ... Gap 65, 85 ... Inner surface of inner cylinder 66, 86 ... Unevenness 70, 90 ... Outer Cylinder 71, 91 ... Inner surface of outer cylinder 72, 92 ... Edge 83 ... Outer surface of inner cylinder 101 ... Joint 102 ... Unit connection line

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-51-121908 (JP, A) JP-A-57-169134 (JP, A) JP-A-59-165737 (JP, A) Actual development Sho-50- 69802 (JP, U) Japanese Patent Publication Sho 50-27645 (JP, B1)

Claims (6)

(57) [Claims] 1. A precast concrete product having a base forming a footing and a rising part raised above the base, and having a predetermined unit shape that is connected to a plurality of units to form a building foundation. A unit type fabric foundation, wherein the base includes a plurality of side members that respectively configure both side surfaces of the base extending along the building foundation, and a plurality of beam members that connect these side members, A space for injecting concrete is framed by the side member and the beam member, the height of the beam member is lower than that of the side member, and a groove for setting a reinforcing bar along the side member either above or below the beam member. Unit type cloth foundation characterized by a regular space. 2. The unitary cloth foundation according to claim 1, wherein the rising portion is formed on an upper portion of the beam member and is supported by the beam member. 3. The unit type cloth foundation according to claim 1, wherein a supporting metal member for temporarily fixing the reinforcing bar is attached to the beam member. 4. The auxiliary beam according to claim 1, wherein at least one pair of the beam members is an auxiliary beam arranged so as to connect ends of the side member facing the unit to be connected to each other. The unitary cloth foundation, wherein the auxiliary beam is provided with a joining means that is temporarily fixed to the auxiliary beam of the unit to be connected. 5. The unit type cloth foundation according to claim 1, wherein a corner of a lower end portion of the base portion facing the connected unit is in contact with the ground. 6. A precast having a predetermined unit shape which has a base forming a footing and a rising portion raised above the base and is connected to a plurality of adjacent units to form a building foundation. In a concrete unit type fabric foundation, at the end of the adjacent unit side of the rising portion,
Either an upper protrusion (32) protruding above the rising portion toward the adjacent unit or a lower protrusion (33) notched above the rising portion is formed, The protrusion (32) has a first recess (35) which is opened in the direction of the adjacent unit and in which a reinforcing bar is protruded, and the upper protrusion of the rising portion following the lower protrusion (33). A second recess (3) that opens in the direction of the adjacent unit and has a reinforcing bar protruding inside is provided on the upper part facing (32).
6) is formed, and the substantially continuous rising portion is formed by overlapping the upper protruding portion (32) and the lower protruding portion (33), and the first recess (35) and the second protruding portion (35) are formed. A unitary cloth foundation, characterized in that the recesses (36) define a space connecting the reinforcing bars.