JP2698907B2 - Foundation structure for building - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foundation structure for a building, comprising a plurality of concrete blocks connected to the ground and supporting the building.

[0002]

2. Description of the Related Art Generally, the foundation for building a building is:
For example, in many cases, so-called cast-in-place is used, and this is constructed by assembling a formwork on the ground, casting and solidifying concrete, removing the formwork, and then finishing the upper surface.
By the way, in such a foundation structure for a building, since it is necessary to build by removing the formwork one by one, the construction work is complicated, and
Since there are restrictions such as the influence of weather, there is a problem that the construction period becomes longer.

[0003] In order to solve this, conventionally,
A large number of concrete blocks mass-produced at the factory are connected to the ground, and an elongated tension member is passed through a through hole provided in the concrete block and having an axis in the connecting direction, and a tensile force is applied to the tension member to apply a concrete block. A substructure for a building has been developed in which the structures are joined by joining each other and then grouting the space between the through-hole and the tension member with a paste such as concrete mortar. 2952
No. 5 publication). As a result, it is not necessary to use a mold, so that the operation is simplified, and the construction period can be shortened because there is no influence of the weather.

[0004]

However, even in the conventional foundation structure for a building constructed by joining concrete blocks together, the tension member must be passed through at the time of construction, and the tension member must be penetrated after the completion of the tensioning operation. The grouting process of filling the paste between the hole and the tension member is performed, so this work-in and filling is difficult because the through-hole is narrow, so the work is complicated and the work efficiency is poor. was there. In particular, when the continuous length of the concrete blocks is increased, the work becomes more difficult.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and enables a tension member to be provided without connecting a tension member each time a concrete block is connected, thereby further improving work efficiency. It is intended to provide a planned substructure for a building.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a foundation structure for a building according to the present invention comprises a plurality of concrete blocks connected to the ground, and a through-hole provided on the concrete blocks and having an axis in the connecting direction. In a substructure for a building constituted by joining concrete blocks by applying tensile force to an elongated tension member passed through the hole, a tension member is movably inserted in advance through the through hole of the concrete block, A recess is formed at the joint end side of the concrete block so that the end of the tension member is exposed, and the ends of the tension members of the adjacent concrete blocks are connected to each other via a connection means at the recess. In this case, it is effective that the connecting means is provided with a pulling function for pulling the ends of the tension member.

[0007] If necessary, the tension member is formed of a metal rod, and the connecting means includes a male screw portion formed at an end of the tension member and a male screw portion of a pair of adjacent tension members. A coupling member comprising a pair of plate bodies facing each other having an insertion hole to be inserted and a coupling body connecting the pair of plate members, and a male member of a tension member inserted into the insertion hole is screwed. And a nut locked to the plate of the connecting member. Further, if necessary, an unbonding agent is interposed between the through hole and the tension member in advance.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a basic structure of a building according to an embodiment of the present invention.
As shown in FIGS. 1 to 4, the foundation structure for a building according to the embodiment of the present invention has a structure in which a large number of concrete blocks 2 are continuously connected to a ground 1 and a tensile force is applied to a tension member 20, which will be described later. Join them together, for example
As shown in FIG. 2, it is constructed in a planar box shape with a plurality of sections. The concrete block 2 is formed in an inverted T-shape in vertical section, and is formed with a bottom wall 3 and a standing wall 4 erected at the center of the bottom wall 3. As shown in FIG. 3, reference numeral 5 denotes a mortar laid in the groove 6 of the ground 1, reference numeral 7 denotes an adjustment mortar provided on the stone 5, and a bottom wall 3 of the concrete block 2 is installed on the adjustment mortar 7. Is done. The lower sides of the bottom wall 3 and the standing wall 4 are buried in the ground after installation.

The types of the concrete block 2 include:
As shown in FIG. 2, a standard concrete block (A) having a straight cross section and a concrete block (B, D) formed in the same manner as the standard concrete block for adjusting the length, which mainly constitutes a general part, There are a T-shaped concrete block (C) provided in the middle and having a portion extending inside the foundation and having a T-shaped cross section, and a corner concrete block (E) provided at a corner and having an L-shaped cross section. The size of the concrete block 2, as shown in FIGS. 3 and 4,
For example, height H = 900 mm, width D1 of bottom wall 3 = 450
mm, the width D2 of the standing wall 4 is set to 120 mm, and the height h of the standing wall 4 is set to 750 mm. The length L is the case of the standard concrete block (A). For example, L = 45
The dimensions are appropriately determined such as 0, 900, and 1800 mm. These dimensions are not limited to these, and may be determined appropriately.

In the concrete block 2,
Reference numeral 10 denotes a plurality of through bars in a continuous direction (longitudinal direction) embedded in the inside, and 11 denotes a hoop bar provided so as to bundle the through bars 10 in the standing wall 4. Reference numeral 13 denotes a vent hole formed in the upper surface of the standing wall 4, and 14 denotes a bolt (not shown) for fixing a base provided on the standing wall 4, which is buried with an opening in the upper surface of the standing wall 4. Is an implanted nut to be screwed.

The concrete block 2 is provided with a plurality of through-holes 15 having an axis in the connecting direction and through which an elongated tension member 20 is passed. In the example shown in the figure, three through holes 15 are provided, one on the standing wall 4 and one on each of the left and right sides of the bottom wall 3. Through hole 15
The number is not limited to this, and may be provided as appropriate. The tension member 20 is formed of, for example, a metal bar called a PC steel bar, and has a length substantially equal to the length of the concrete block 2, and is slightly shorter in the example shown in the drawing.
The tension member 20 is movably inserted in the through hole 15 of the concrete block 2 in advance.

As shown in FIGS. 5 and 7, an unbonding agent 21 is interposed between the through hole 15 and the tension member 20 in advance. As the unbonding agent 21, for example, grease or the like is used. This unbonding agent 21
Is covered with, for example, a flexible thin hose 22 made of polyethylene. As shown in FIG. 6, in the portion extending inside the T-type concrete block (C) and the corner concrete block (E), the tension member 20 is used.
Is fixed by being embedded in the concrete block 2 with a fixing member 23 attached to one end. Further, a concave portion 24 from which the end of the tension member 20 is exposed is formed on the joint end side of the concrete block 2. Then, the ends of the tension members 20 of the concrete blocks 2 adjacent to each other in the recess 24 are connected to each other via the connecting means 30.

This connecting means 30 is shown in FIGS.
As shown in FIG. 2, the tension member 20 is configured to have a pulling function for pulling the ends of the tension member 20 together. For more information,
The connecting means 30 includes a male screw part 31 formed at an end of the tension member 20 and a pair of adjacent tension members 20.
A metal having a frame shape as a whole comprising a pair of plate bodies 33 facing each other having an insertion hole 32 through which the male screw portion 31 is inserted, and two joints 34 connecting the pair of plate bodies 33 to each other. And a connecting member 35 which is screwed into the male screw portion 31 of the tension member 20 inserted through the insertion hole 32.
And a nut 36 which is locked to the plate 33.

Next, an example of forming the concrete block 2 will be described. As shown in FIG.
An unbonding agent 21 is applied to the outer periphery of the tension member 20 and a hose 22 is coated thereon. Also, a molding frame (not shown) of the concrete block 2 is prepared in advance. Then, the tension member 20 coated with the unbonding agent 21 and the hose 22 is held in a molding frame, and in this state, fluid concrete is poured and cured for a required time, and then the product is released. The concrete block 2 thus created can be mass-produced in a factory or the like.

The construction of a foundation for a building by using the concrete block 2 is performed as follows. As shown in FIG. 3, a groove 6 is formed in advance in the ground 1 along the foundation, and a mortar 5 is laid in the groove 6, and an adjustment mortar 7 is provided on the stone 5, and concrete is placed on the adjustment mortar 7. Block 2 is installed in series. At this time, the connecting member 35
The male screw portion 31 of the tension member 20 is inserted through the insertion hole 32 of the
Perform while temporarily tightening to 1. In this case, the concrete block 2 is installed, and the tension member 20 is
The tension member 20 can be disposed simply by connecting the tension members to each other, so that the complicated operation of inserting the tension member 20 one by one as in the related art is unnecessary, and the construction operation is extremely easily performed.

After the concrete block 2 has been installed, the ends of the tension members 20 of the adjacent concrete blocks 2 in the recess 24 are pulled by the connecting means 30. That is, the nut 36 is sequentially tightened in the recess 24 using a spanner or the like. This allows
A tensile force is applied to the tension member 20, and the concrete blocks 2 are firmly joined together. in this case,
Since the unbonding agent 21 is interposed in the through hole 15, the movement of the tension member 20 is performed smoothly.
The concrete block 2 is securely joined. Further, the complicated work of press-fitting and filling the paste between the through-hole 15 and the tension member 20 after the tension member 20 is pulled is unnecessary, which makes the construction work extremely simple.

In this tightening, in order to improve the tightening efficiency, for example, as shown in FIG.
0 is used. That is, a pair of arms 42 which engage with another nut 41 screwed to the tip of the tension member 20 and can swing through a hinge 45 are swung by a hydraulic jack 44 which is operated by oil pressure from a hydraulic pump 43. Thus, the tension members 20 are pulled so that the tips thereof come close to each other. Then, for example, the tension member 20 is pulled by the pulling jig 40 at several connecting means 30, and the nut 36 is tightened in this state. Therefore, compared with the case where the nut 36 is tightened only, the tensile force can be increased, and the joining between the concrete blocks 2 can be ensured. In this case, since the tightening adjustment of the nut 36 can be performed, the joining strength between the concrete blocks 2 can be easily adjusted. When the tension member 20 has been pulled, the recess 24 is filled with concrete, the soil is filled in the groove 6, and the lower sides of the bottom wall 3 and the standing wall 4 are buried in the ground. This completes the construction of the building foundation.

In the above embodiment, the connecting means 3
The configuration of 0 is not limited to the above-described one. For example, different right and left screws are formed at the ends of the adjacent tension members 20, and these are connected with nuts screwed to both. It can be changed as appropriate. Further, in the above-described embodiment, the tension member 20 is pulled by the connecting means 30. However, the present invention is not limited to this. Only the connection is performed by the connecting means 30, and the entire connected tension member 20 is pulled. May be pulled at both ends of the foundation or may be changed as appropriate. Further, although the tension member 20 is constituted by a metal rod,
The invention is not necessarily limited to this. For example, it may be constituted by a wire such as a piano wire or the like, and may be changed as appropriate. In this case, the connecting means 30 is provided at the tip of the wire and can be hooked to each other. And may be formed as appropriate.

[0019]

As described above, according to the foundation structure for a building of the present invention, a concrete block provided with a connectable tension member is used in advance.
Since the tension members can be arranged simply by installing the concrete block and connecting the tension members with the connecting means, the complicated work of inserting the tension members one by one as in the related art is unnecessary, and thus the construction work is reduced. As a result, the working efficiency can be greatly improved, and the construction period can be further shortened.

When the connecting means is provided with a tension function for pulling the ends of the tension members, the tension members can be pulled at the joints of the concrete blocks, so that the joint strength between the concrete blocks can be increased. Can be easily adjusted.

Further, the tension member is formed of a metal rod,
The connecting means includes a male screw formed at an end of the tension member, a connecting member into which the male screw is inserted, and a nut screwed into the male screw and locked to the connecting member. If you do, you can simplify the structure,
It can be cheap.

Further, when an unbonding agent is interposed between the through-hole and the tension member in advance, grout treatment for filling a paste between the through-hole and the tension member one by one at the time of construction as in the prior art is performed. Since there is no need to perform the work, the construction work is further simplified, the work efficiency can be greatly improved, and the construction period can be shortened. In addition, the concrete block incorporating the tension member can be easily formed, and the tension member can be moved smoothly when the tension member is pulled, so that the concrete block can be securely joined. Can be.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a foundation structure for a building according to an embodiment of the present invention.

FIG. 2 is a plan view showing a building substructure according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view corresponding to line XX in FIG. 1 showing the foundation structure for a building according to the embodiment of the present invention.

FIG. 4 is a sectional view, taken along the line YY in FIG. 1, showing the basic structure for a building according to the embodiment of the present invention.

FIG. 5 is a main part view showing a connecting means of the foundation structure for a building according to the embodiment of the present invention.

FIG. 6 is a view showing different types of concrete blocks.

FIG. 7 is a perspective view showing a state before molding of the tension member according to the embodiment of the present invention.

FIG. 8 is a cross-sectional view showing an example when a tension member of the building foundation structure according to the embodiment of the present invention is pulled.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ground 2 Concrete block 3 Bottom wall 4 Erect wall 5 Kuriishi 7 Adjustment mortar 15 Through hole 20 Tension member 21 Unbonding agent 22 Hose 24 Concave part 30 Connection means 31 Male screw part 32 Insertion hole 33 Plate body 34 Coupling body 35 Connection member 36 Nut 40 Tension jig

Claims (4)

(57) [Claims] A plurality of concrete blocks are connected to the ground, and tensile forces are applied to elongated tension members which are provided in the concrete blocks and which are passed through through holes having an axis in the connecting direction, and the concrete blocks are connected to each other. In a foundation structure for a building constructed by joining, a tension member is movably inserted into a through hole of the concrete block in advance, and a recess is formed at a joint end side of the concrete block so that an end of the tension member is exposed. A foundation structure for a building, wherein the ends of the tension members of the concrete blocks adjacent to each other in the recess are connected via connecting means. 2. The foundation structure for a building according to claim 1, wherein said connecting means is provided with a tension function for tensioning the ends of the tension member. 3. The tension member is formed of a metal rod.
The connecting means includes a male screw formed at an end of the tension member, a pair of plate bodies facing each other having an insertion hole through which a male screw of a pair of adjacent tension members is inserted, and the pair of plates. A connecting member made of a connecting body for connecting the plate members, and a nut screwed into the male screw portion of the tension member inserted into the insertion hole and locked to the plate member of the connecting member. The substructure for a building according to claim 2, characterized in that: 4. An unbonding agent is interposed between the through hole and the tension member in advance.
The foundation structure for a building according to 2 or 3.