JP2014077305A - Precast concrete foundation and foundation structure of building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve durability by reducing breakage at carrying, construction, earthquake or the like and improving earthquake resistance.SOLUTION: A precast concrete foundation includes a plate-shaped panel block 2 erected on a footing 1 and is formed by pouring fluid concrete into a shaping mold. One end and the other end of the panel block 2 are each provided with a first engaging part 5 in which a projecting part 3 and a recessed part 4 are continuously formed, or a second engaging part 6 in which a recessed part 4 and a projecting part 3 engaging with the projecting part 3 and the recessed part 4 of the first engaging part 5, respectively, are continuously formed. In the first and second engaging parts 5, 6, these projecting parts 3 and recessed parts 4 continued to each other are formed in a curved wave shape.

Description

  The present invention relates to a precast concrete foundation used for a foundation of a building such as a house and a foundation structure of a building, and in particular, a precast concrete foundation in which adjacent ones are engaged and connected by an uneven engaging portion, and Concerning the basic structure of the building.

  Generally, in order to shorten the construction period at the site of a building such as a house, a precast concrete foundation (also referred to as a PC foundation) previously molded at a factory etc. is used, and this is connected to the ground. Is going to build. In addition, as this type of precast concrete foundation, in order to increase the connection strength between adjacent ones, those in which concave and convex engaging portions are formed and connected to these end portions are also used.

  Conventionally, as such a precast concrete foundation, for example, a technique described in Japanese Utility Model Laid-Open No. 4-1236 (Patent Document 1) is known. As shown in FIG. 10, two types of precast concrete foundations are provided. One precast concrete foundation Ka (A) is provided with a plate-like panel block 101 standing on the footing 100 and is formed by pouring fluid concrete into a mold, and at one end and the other end of the panel block 101, A first engaging portion 104 in which a convex portion 102 and a concave portion 103 formed in a shape are continuous is provided. The other precast concrete foundation Ka (B) is a concave portion formed in a rectangular shape that is engaged with the convex portion 102 and the concave portion 103 of the first engaging portion 104 at one end and the other end of the panel block 101, respectively. A second engaging portion 105 in which 103 and the convex portion 102 are continuous is provided. And when building the foundation of a building using this precast concrete foundation Ka (A) (B), prepare a plurality of these, and the ends of adjacent precast concrete foundations are first engaged on the ground. The first engagement portion 104 and the second engagement portion 105 of the adjacent precast concrete foundation Ka are engaged with each other. To be installed. Then, a rod 107 is inserted and stopped in a through hole 106 provided in each convex portion 102 and having an axis in the vertical direction. As a result, the adjacent precast concrete foundations Ka are connected by the engagement of the concave and convex first engaging portions 104 and the second engaging portions 105 provided at these end portions, so that adjacent ones are connected to each other. Strength is increased.

Japanese Utility Model Publication No.4-1236

By the way, in the above-mentioned conventional precast concrete foundation Ka, the end portion where the first engagement portion 104 and the second engagement portion 105 are located is exposed with concrete and has a rectangular unevenness with many corners, so that the end portion itself has a large number of corners. Since the strength is weak and brittle, there is a drawback that it is easily damaged by bumping into other parts during transportation or construction. Moreover, in the foundation of the building constructed using this precast concrete foundation Ka, the first engagement portion 104 and the second engagement portion 105 are engaged with each other between adjacent precast concrete foundations Ka. For example, when vibration is applied due to an earthquake or the like, the end part is exposed to the concrete, and the unevenness formed in a rectangular shape has many corners, and the strength of the end part itself is weak and brittle. Since it becomes easy to do and connection strength also becomes weak, there existed a problem that it was inferior to earthquake resistance and as a result, durability was also inferior.
The present invention has been made in view of the above-mentioned problems, making it difficult to break during transportation, construction, earthquakes, etc., increasing vibration absorption, improving earthquake resistance, and improving durability. It aims at providing the foundation structure of the precast concrete foundation and building which aimed at.

In order to achieve such an object, a precast concrete foundation of the present invention comprises a plate-like panel block standing on a footing and is formed by pouring fluid concrete into a mold, and at one end of the panel block and others. A first engagement portion in which a convex portion and a concave portion are continuous at each end, or a second engagement in which the concave portion and the convex portion are in a relationship of engaging with the convex portion and the concave portion of the first engagement portion, respectively. In a precast concrete foundation with a section,
The first engaging portion and the second engaging portion are configured such that these continuous convex portions and concave portions are formed in a curved wave shape.

Thereby, when constructing the foundation of a building using this precast concrete foundation, a plurality of these are prepared, and the ends of adjacent precast concrete foundations on the ground are the first engagement portion and the second engagement portion. Then, the first engaging portion and the second engaging portion of the adjacent precast concrete foundations are engaged with each other and arranged in series. In this case, since the convex portions and concave portions of the first engaging portion and the second engaging portion are curved wave shapes, the end portions of the concavo-convex shape of the panel block at the time of transportation and construction, compared to the case of making it square. Even if it collides with others, it becomes difficult to break.
In addition, after construction, for example, when vibration is applied due to an earthquake or the like, the first engagement portion and the second engagement portion try to collide with each other at the uneven end portion of the panel block. Since the convex portions and concave portions of the one engaging portion and the second engaging portion which are continuous are curved wave shapes, they can easily slip and escape from each other, and can easily absorb vibration. Therefore, the earthquake resistance is extremely improved, and as a result, the durability can be improved.
In this structure, it is desirable to provide a clearance of about 1 to 10 mm between the projecting portion and the recessed portion in the engaging relationship. Construction is easy and exhibits vibration absorption.

And if necessary, the first cover member made of metal provided on one end and the other end of the panel block so as to cover the inner concrete and corresponding to the first engaging portion or the second engaging portion, respectively. Alternatively, the second cover member is provided.
Thereby, when constructing the foundation of a building using this precast concrete foundation, a plurality of these are prepared, and the ends of adjacent precast concrete foundations on the ground are the first engagement portion and the second engagement portion. Then, the first engaging portion and the second engaging portion of the adjacent precast concrete foundations are engaged with each other and arranged in series. In this case, even if the concavo-convex ends of the panel block collide with each other during transportation or construction, both ends of the concavo-convex shape are covered with a metal cover member, so the strength of the end portion itself is Therefore, it is possible to prevent the end portion from being damaged.
In addition, after construction, for example, when vibration is applied due to an earthquake or the like, the first engagement portion and the second engagement portion try to collide with each other at the uneven end portion of the panel block. Since both ends of the concavo-convex shape are covered with the metal cover member, the strength of the end itself is increased, and therefore, the situation where the end is damaged can be prevented. Further, since the end portions are not easily damaged and the metals are engaged with each other, the connection strength is increased and the earthquake resistance is extremely improved. As a result, the durability can be improved.
In this structure, it is desirable to provide a clearance of about 1 to 10 mm between the projecting portion and the recessed portion in the engaging relationship. Construction is easy and exhibits vibration absorption.

In this case, if necessary, the first cover member and the second cover member are respectively exposed to the end face plate exposed on the end face of the panel block and the front and back faces of the panel block provided on both sides of the end face plate. A pair of side plates and a top plate connected to the end face plates and the pair of side plates and exposed on the upper surface of the panel block, and concrete is formed inside the end face plates, the pair of side plates and the top plate at the time of molding. The filling space filled with is formed.
Thereby, the end portion of the panel block is covered with the four surfaces of the end face plate, the pair of side plates and the top plate, and in particular, since the top plate is provided, the covering of the end portion is ensured, and further, It is possible to increase the strength and prevent damage.

  Further, if necessary, the first engagement portion and the second engagement portion are arranged so that the engagement relationship between the convex portions and the concave portions restricts the vertical movement of the panel block and is orthogonal to the front and rear surfaces. It is formed so as to have a relationship that allows movement in the direction. Thereby, after construction, the convex portions of the first engaging portion and the convex portions of the second engaging portion are in a relationship in which the convex portions of the first engaging portion and the second engaging portion are engaged with each other in the vertical direction, thereby ensuring the connection.

  Further, unlike the above, if necessary, the engagement relationship between the convex portions and the concave portions of the first engaging portion and the second engaging portion allows the panel block to move in the vertical direction. It forms so that it may become the relationship which regulates the movement of the front-back direction orthogonal to a back surface. Also in this case, after the construction, the convex portions of the first engaging portion and the convex portions of the second engaging portion are in a relationship in which they collide with each other in the front and back directions, so that the connection can be ensured.

  Moreover, it is set as the structure which provided two or more convex parts of the said 1st engaging part as needed, and provided the recessed part of the said 2nd engaging part corresponding to the convex part of the said 1st engaging part. Engagement is ensured as compared with a single convex portion, and the connection strength can be improved.

  Furthermore, if necessary, the first fitting part in which the convex part and the concave part are connected to one end and the other end of the footing, respectively, or the relation of fitting to the convex part and the concave part of the first fitting part, respectively. A second fitting part in which a certain concave part and a convex part are formed is formed, and the first fitting part and the second fitting part are formed so that the continuous convex part and the concave part have a curved wave shape. It is configured. Since adjacent precast concrete foundations are also fitted in the footing, the connection strength can be improved. In addition, after the construction, for example, when vibration is applied due to an earthquake or the like, the first fitting portion and the second fitting portion collide with each other not only in the panel block but also in the uneven end portion of the footing. Although it is going to match, since the convex part and recessed part which a 1st fitting part and a 2nd fitting part continue are a wave shape of a curve, it becomes easy to slip mutually and to escape and can make it easy to absorb a vibration. Therefore, the earthquake resistance is extremely improved, and as a result, the durability can be improved. Also in this case, it is desirable to provide a clearance of about 1 to 10 mm between the convex portion and the concave portion in the fitting relationship. Construction is easy and exhibits vibration absorption.

In this case, the first fitting portion and the second fitting portion, if necessary, the fitting relationship between the convex portion and the concave portion regulates the vertical movement of the panel block and is orthogonal to the front and back surfaces. It is formed to have a relationship that allows movement in the front and back direction. Thereby, after the construction, the convex portions of the first fitting portion and the convex portions of the second fitting portion are in a relationship in which the convex portions of the first fitting portion make contact with each other in the vertical direction, thereby ensuring the connection.
In this configuration, the first engagement portion and the second engagement portion are arranged so that the engagement relationship between the protrusions and the recesses allows the panel block to move in the vertical direction and is orthogonal to the front and back surfaces. In the one formed so as to restrict the movement, the fitting relationship between the first fitting portion and the second fitting portion of the footing is opposite to that of the first engaging portion and the second engaging portion. Since the movement in the front and back direction can be restricted by the block and the movement in the vertical direction can be restricted by the footing, the connection can be further ensured.

Further, unlike the above, if necessary, the fitting relationship between the convex portions and the concave portions of the first fitting portion and the second fitting portion allows the panel block to move in the vertical direction. It forms so that it may become the relationship which regulates the movement of the front-back direction orthogonal to a back surface. In this case, after the construction, the convex portions of the first fitting portion and the convex portions of the second fitting portion are in a relationship in which the convex portions of the first fitting portion and the second fitting portion are brought into contact with each other in the front and back directions, thereby ensuring connection.
In this configuration, the first engagement portion and the second engagement portion are arranged so that the engagement relationship between the convex portions and the concave portions restricts the vertical movement of the panel block, and the front and back directions are orthogonal to the front and rear surfaces. In the one formed so as to allow the movement, the fitting relationship between the first fitting portion and the second fitting portion of the footing is opposite to that of the first engaging portion and the second engaging portion. Since the movement in the vertical direction can be restricted by the block and the movement in the front and back direction can be restricted by the footing, the connection can be further ensured.

  Furthermore, when necessary, when the adjacent first engaging portion and second engaging portion are engaged with the one end portion and the other end portion of the panel block, respectively, the one end portion and the other end portion are provided. It is set as the structure which provided the through-hole penetrated in the front and back direction used in order to connect. Thereby, for example, using a connecting plate having an insertion hole corresponding to each through-hole, this connecting plate is installed between one end and the other end of the front and back surfaces, respectively. Bolts can be inserted through the corresponding through holes, and nuts can be screwed in and fixed. In this way, the connection is further ensured. If the bolt has an outer diameter smaller than the inner diameter of the through hole and the insertion hole, and the bolt is loosely fitted into the through hole and the insertion hole, vibration absorption can be ensured by play.

  Moreover, it is set as the structure which formed the bottom face of the said footing into the wave shape continuous along a longitudinal direction or the width direction as needed. Thereby, the bottom face of the footing bites into the installation surface well, and the installation can be strengthened and stabilized accordingly.

  Moreover, the foundation structure of the building of the present invention for achieving the above object uses a plurality of the above-mentioned precast concrete foundations, and the end portions of the adjacent precast concrete foundations are the first engaging portion and the second engaging portion. They are arranged so as to be in an engagement relationship, and are configured to be engaged with each other and connected. Has the same effects and effects as above.

  In this case, if necessary, an elastic member is interposed between the convex and concave portions of the first engaging portion that engage with each other and the concave and convex portions of the second engaging portion. Thereby, after construction, for example, when vibration is applied due to an earthquake or the like, the first engagement portion and the second engagement portion try to collide with each other at the uneven end portion of the panel block. Since the elastic member is interposed, the impact is absorbed by this elastic member, so that the strength of both ends itself is strengthened and the situation where the ends are further damaged is prevented. Can do. Moreover, since this elastic member can also absorb vibration, it is possible to improve earthquake resistance.

  Further, if necessary, when the adjacent first engaging portion and second engaging portion are engaged with the one end portion and the other end portion of the panel block, respectively, the one end portion and the other end portion are connected to each other. Provided through holes that pass through in the front and back direction used for connection, and a connecting plate having an insertion hole corresponding to each through hole is installed between the one end and the other end, respectively on the front and back surfaces, Bolts are inserted into the insertion holes of the connecting plate and the corresponding through holes, and nuts are screwed and fixed. The connection will be even more secure.

According to the present invention, when the precast concrete foundation is transported or constructed, even if the concave and convex ends of the panel block collide with each other, the first engaging portion and the second engaging portion are continuously convex and Since the concave portion has a curved wave shape, it is less likely to be damaged than when the concave portion is made square.
In addition, after construction, for example, when vibration is applied due to an earthquake or the like, the first engagement portion and the second engagement portion try to collide with each other at the uneven end portion of the panel block. Since the convex portions and concave portions of the one engaging portion and the second engaging portion which are continuous are curved wave shapes, they can easily slip and escape from each other, and can easily absorb vibration. Therefore, the earthquake resistance is extremely improved, and as a result, the durability can be improved.

It is a perspective view which shows the precast concrete foundation which concerns on 1st embodiment of this invention in the connection state. It is the perspective view seen from the direction different from FIG. 1 which shows the precast concrete foundation which concerns on 1st embodiment of this invention. The principal part of the precast concrete foundation which concerns on 1st embodiment of this invention is shown, (a) is a perspective view which shows a 1st cover member, (b) is a perspective view which shows a 2nd cover member. It is a principal part front view which shows the foundation structure of the building constructed | assembled using the precast concrete foundation which concerns on 1st embodiment of this invention. It is a principal part cross-sectional view which shows the foundation structure of the building constructed | assembled using the precast concrete foundation which concerns on 1st embodiment of this invention. The basic structure of the building constructed | assembled using these while showing the aspect of the precast concrete foundation which concerns on 1st embodiment of this invention is shown, (a) is a front view, (b) is a principal part top view. It is a perspective view which shows the precast concrete foundation which concerns on 2nd embodiment of this invention in the connection state. In embodiment of this invention, the modification of the bottom face of a footing is shown, (a) is the front view formed in the waveform continuous in the longitudinal direction, (b) is the waveform continuous in the width direction. It is the formed cross-sectional view. In embodiment of this invention, it is a figure which shows the precast concrete foundation which concerns on another relationship of a 1st engaging part and a 2nd engaging part, (a) is 1st engagement in both an end part and an other end part The perspective view which shows the precast concrete foundation comprised by the part, (b) is a perspective view which shows the precast concrete foundation comprised by the 2nd engaging part in the one end part and the other end part. It is a perspective view which shows an example of the conventional precast concrete foundation.

Hereinafter, based on an accompanying drawing, the precast concrete foundation concerning the embodiment of the present invention and the foundation structure of a building are explained in detail.
1 to 6 show a precast concrete foundation K according to a first embodiment of the present invention. This precast concrete foundation K includes a rectangular plate-like panel block 2 erected on a rectangular plate-like footing 1, and is formed by pouring fluid concrete into a mold, and a convex portion 3 at one end of the panel block 2. And the recessed part 4 which has the 1st engaging part 5 which the recessed part 4 follows, and is engaged with the convex part 3 and the recessed part 4 of the 1st engaging part 5 in the other end of the panel block 2, respectively. Has a continuous second engaging portion 6.

  The precast concrete foundation K is provided with a first cover member Ca made of metal in which the first engaging portion 5 is formed and the one end portion 7 of the panel block 2 is covered with the concrete inside, and the panel block 2. A second cover member Cb made of metal is provided on the other end portion 8 of the second cover member 8 so as to cover the inner concrete and the second engaging portion 6 is formed. For example, iron is used as the metal.

  As shown in FIG. 3, the first cover member Ca and the second cover member Cb are respectively provided on the end face plate 20 exposed on the end face of the panel block 2 and on both sides of the end face board 20. A pair of side plates 21 exposed on the front and back surfaces and an end plate 20 and a top plate 22 connected to the pair of side plates 21 and exposed on the upper surface of the panel block 2 are configured. The end face plate 20, the pair of side plates 21 and the top plate 22 are joined by welding. And the filling space 23 filled with concrete at the time of shaping | molding is formed inside the end surface board 20, a pair of side plate 21, and the top plate 22. As shown in FIG.

  In the first cover member Ca and the second cover member Cb, the first engagement portion 5 and the second engagement portion 6 are such that the engagement relationship between the projection 3 and the depression 4 is the vertical movement of the panel block 2. Is formed so as to allow the movement in the front-back direction perpendicular to the front and back surfaces. That is, the concave portion 4 is formed in a groove shape penetrating in the front and back direction, and the convex portion 3 of the first engaging portion 5 and the convex portion 3 of the second engaging portion 6 are in a relationship in which the convex portions 3 are in the vertical direction. Is formed.

Two or more convex portions 3 of the first engaging portion 5 are provided, and the concave portions 4 of the second engaging portion 6 are provided in a number corresponding to the convex portions 3 of the first engaging portion 5.
Specifically, in the first cover member Ca, two convex portions 3 of the first engaging portion 5 are provided, and three concave portions 4 are provided. The recess 4 is provided on the upper side, the middle, and the lower side.
On the other hand, in the second cover member Cb, two concave portions 4 of the second engaging portion 6 are provided, and three convex portions 3 are provided. The convex part 3 is provided in the upper side, the middle, and the lower side.

  And the 1st engaging part 5 and the 2nd engaging part 6 are formed so that these continuous convex parts 3 and the recessed part 4 may become the waveform of a curve. That is, in the first cover member Ca and the second cover member Cb, the end face plate 20 is formed in a wave shape, and the joining edge of the side face plate 21 to the side edge of the end face plate 20 is the side edge of the end face plate 20. The side edge of the end face plate 20 and the joining edge of the side face plate 21 are joined by welding. Since these continuous convex portions 3 and concave portions 4 are formed so as to have a curved wave shape, the metal can be easily manufactured as compared with the case where the convex portions 3 and the concave portions 4 are formed in a square shape. Further, the convex portion 3 and the concave portion 4 of the first engaging portion 5 and the second engaging portion 6 have a clearance of about 1 to 10 mm between the convex portion 3 and the concave portion 4 that are in an engaging relationship. It is formed as follows.

  The one end 7 and the other end 8 of the panel block 2 are respectively connected to the first end 7 and the other end 8 when the adjacent first engaging portion 5 and second engaging portion 6 are engaged with each other. A through hole 30 penetrating in the front and back direction used for connecting the 8 is provided. The through holes 30 are provided in the one end portion 7 and the other end portion 8, respectively, at predetermined intervals in the vertical direction and three at the same time, and the side plates of the first cover member Ca and the second cover member Cb. 21, and the concrete filled in the filling space 23 is provided therethrough.

  Connection of the panel block 2 using this through-hole 30 is performed using a connection plate 31 made of metal such as iron. As shown in FIG. 1, the connecting plate 31 is formed in a size that covers the side plates 21 of the first cover member Ca and the second cover member Cb engaged with each other, and insertion holes 32 corresponding to the through holes 30 are formed. Is formed. The connecting plate 31 is installed between the one end portion 7 and the other end portion 8 on the front and back surfaces thereof, and bolts 33 are inserted into the insertion holes 32 of the connecting plate 31 and the corresponding through holes 30, and nuts 34. Is fixed by screwing. The bolt 33 has an outer diameter smaller than the inner diameter of the through hole 30 and the insertion hole 32, and the bolt 33 is loosely fitted into the through hole 30 and the insertion hole 32. By play, vibration absorption described later can be ensured.

  Furthermore, a first fitting portion 45 in which a convex portion 43 and a concave portion 44 are continuous is formed at one end of the footing 1, and a convex portion 43 and a concave portion 44 of the first fitting portion 45 are formed at the other end of the footing 1. A second fitting portion 46 is formed in which the concave portion 44 and the convex portion 43 that are in a fitting relationship are continuous. In the first fitting portion 45 and the second fitting portion 46, the fitting relationship between the convex portion 43 and the concave portion 44 allows the vertical movement of the panel block 2, and the front and back directions orthogonal to the front and back surfaces. It is formed to have a relationship that restricts movement.

That is, the concave portion 44 is formed in a groove shape penetrating in the up-down direction, and the convex portion 43 of the first fitting portion 45 and the convex portion 43 of the second fitting portion 46 are in a relationship in which they face each other in the front-back direction. Is formed. Further, two or more convex portions 43 of the first fitting portion 45 are provided, and the concave portions 44 of the second fitting portion 46 are provided in a number corresponding to the convex portions 43 of the first fitting portion 45. Specifically, two convex portions 43 of the first fitting portion 45 are provided, and three concave portions 44 are provided. The recess 44 is provided on the front side, the middle, and the back side.
On the other hand, two concave portions 44 of the second fitting portion 46 are provided, and three convex portions 43 are provided. The convex portions 43 are provided on the front side, the middle, and the back side.
And the 1st fitting part 45 and the 2nd fitting part 46 are formed so that these continuous convex parts 43 and the recessed part 44 may become the waveform of a curve.

  Further, when the adjacent first fitting portion 45 and second fitting portion 46 are fitted to the one end portion 40 and the other end portion 41 of the footing 1, respectively, the one end portion 40 and the other end portion 41. A fastening hole 50 having an axis in the front and back direction used for connecting the two is provided. The fastening holes 50 are provided one by one on the front and back of the one end 40 and the other end 41, respectively.

  The connection of the footing 1 using the fixing hole 50 is performed using a connection plate 51 made of metal such as iron. As shown in FIG. 1, the connecting plate 51 is formed in a rectangular shape laid on the side surfaces of the footings 1 engaged with each other, and an insertion hole 52 corresponding to each fastening hole 50 is formed. The connecting plate 51 is installed between the one end portion 40 and the other end portion 41 of the footing 1 on the front and back surfaces thereof, and the bolts 53 are inserted into the insertion holes 52 of the connecting plate 51 and the corresponding fixing holes 50 are screwed. And fix it.

  In addition, in the precast concrete foundation K according to the first embodiment of the present invention, three types are prepared. As shown in FIG. 6, one precast concrete foundation K (I) is also shown in FIGS. 1 and 2, and is a type in which a rectangular plate-like panel block 2 is erected on the rectangular plate-like footing 1 described above. (So-called type I). As shown in FIG. 6, the second precast concrete foundation K (L) is a type in which an L-shaped panel block 2 is erected on an L-shaped footing 1 as viewed from above (so-called L-shaped). ). As shown in FIG. 6, the third precast concrete foundation K (T) is a type in which a T-shaped panel block 2 is erected on a T-shaped footing 1 as viewed from above (so-called T-type). ). In the T type, the footing 1 and the panel block 2 are extended from the center of the I type toward the back direction, and the extended end 9 is one end 7 or the other end of the I type. It is formed in the same manner as any one of the portions 8, that is, is configured by covering the first cover member Ca or the second cover member Cb.

  Therefore, when manufacturing this precast concrete foundation K, for example, the first cover member Ca and the second cover member Cb are mounted on the mold, and the reinforcing bar 55 (FIG. 5) is disposed in the mold, so that the panel block Pour fluid concrete from the top side of 2 and cure for the required time. Once the concrete has solidified, remove the mold. Thereby, the precast concrete foundation K is manufactured.

  When building the foundation of a building using the precast concrete foundation K thus manufactured, a plurality of these are prepared, and the first engagement portion 5 and the second engagement of the adjacent precast concrete foundation K on the ground are prepared. The parts 6 are continuously engaged with each other. In this case, even if the concave and convex ends 7 and 8 of the panel block 2 collide with each other at the time of transportation and construction, these concave and convex ends are covered with metal cover members Ca and Cb, That is, since the cover plate is covered with the four surfaces of the end plate 20, the pair of side plates 21 and the top plate 22 of the cover members Ca and Cb, and particularly the top plate 22 is also covered, the covering of the end portions 7 and 8 is ensured. Thus, the strength of the end portion itself is increased, so that the end portions 7 and 8 can be prevented from being damaged.

  Further, in the continuous arrangement of the precast concrete foundation K, as shown in FIGS. 1, 4, and 6, the convex portions 3 and the concave portions 4 of the first engaging portions 5 and the second engaging portions 6 that are engaged with each other. An elastic member 56 (FIG. 4) such as a rubber plate is interposed between the concave portion 4 and the convex portion 3. An elastic member (not shown) such as a rubber plate is also provided between the convex portion 43 and the concave portion 44 of the first fitting portion 45 and the concave portion 44 and the convex portion 43 of the second fitting portion 46 that are engaged with each other. To intervene. In this case, the first engaging portion 5 and the second engaging portion 6 are formed so that the continuous convex portion 3 and the concave portion 4 have a curved wave shape, and the first fitting portion 45 and the second fitting portion 6 are formed. Since the joint portion 46 is formed so that the continuous convex portion 43 and the concave portion 44 have a curved wave shape, it is easier to engage compared with the case of making it a square shape, so that construction is facilitated.

If the precast concrete foundation K is continuously provided, in the panel block 2, the connecting plate 31 is installed between the one end portion 7 and the other end portion 8 on the front and back surfaces, respectively. Bolts 33 are inserted into the through holes 30 and the corresponding through holes 30, and nuts 34 are screwed and fixed. Further, in the footing 1, the connecting plate 51 is installed between the one end portion 40 and the other end portion 41 of the footing 1 on the front and back surfaces thereof, and the bolts 53 are inserted into the insertion holes 52 of the connecting plate 51 to correspond. Screw into the fastening hole 50 and fix.
In FIG. 6, the example (part) of the foundation of the building which connected the precast concrete foundation K continuously is shown.

  According to the foundation structure of the building thus constructed, for example, when vibration is applied due to an earthquake or the like, the first engagement portion 5 and the second engagement portion are formed at the uneven end portion of the panel block 2. The joint portion 6 tries to collide with each other, but since both ends of the concavo-convex shape are covered with the metal cover members Ca and Cb, the strength of the end portions 7 and 8 itself is increased. , 8 can be prevented from being damaged. Further, since the end portions 7 and 8 are not easily damaged and the metal is engaged with each other, the connection strength is increased and the earthquake resistance is extremely improved. As a result, the durability can be improved. In particular, two or more convex portions 3 of the first engaging portion 5 are provided, and a plurality of concave portions 4 of the second engaging portion 6 are provided corresponding to the convex portions 3 of the first engaging portion 5, in addition to the first fitting. Since two or more convex portions 43 of the portion 45 are provided, and the number of the concave portions 44 of the second fitting portion 46 corresponding to the convex portions 43 of the first fitting portion 45 is provided, the convex portion 43 is compared with one. Engagement is ensured and the connection strength can be improved, and also in this respect, the earthquake resistance can be improved.

  Further, in the panel block 2, the first engagement portion 5 and the second engagement portion 6 are configured such that the engagement relationship between the convex portion 3 and the concave portion 4 restricts the vertical movement of the panel block 2. In the footing 1, the first fitting portion 45 and the second fitting portion 46 are fitted to the convex portion 43 and the concave portion 44. The relationship is such that the panel block 2 is allowed to move in the vertical direction and restricts the movement in the front and back directions perpendicular to the front and back surfaces. That is, since the engagement relationship of the panel block 2 and the fitting relationship of the footing 1 are reversed, the movement in the vertical direction can be restricted by the panel block 2 and the movement in the front and back direction can be restricted by the footing 1. Therefore, since the movement is restricted in the vertical direction and the front and back direction, the connection can be further ensured, and the earthquake resistance can be improved.

  Further, the first engaging portion 5 and the second engaging portion 6 are formed so that the continuous convex portion 3 and the concave portion 4 have a curved wave shape, and the first fitting portion 45 and the second fitting portion 6 are formed. Since the portion 46 is formed so that the continuous convex portion 43 and the concave portion 44 have a curved wave shape, the first engaging portion 5 can be applied when vibration is applied as compared to the case where the portion 46 is square. The projections 3 of the second engagement portion 6 and the projections 3 of the second engagement portion 6 come in contact with each other, but can easily slip and escape each other, can easily absorb vibration, and can improve the earthquake resistance. it can. Furthermore, an elastic member 56 is interposed between the convex part 3 and the concave part 4 of the first engaging part 5 and the concave part 4 and the convex part 3 of the second engaging part 6 to be engaged with each other. Since an elastic member (not shown) is interposed between the convex portion 43 and the concave portion 44 of the first fitting portion 45 and the concave portion 44 and the convex portion 43 of the second fitting portion 46, the elastic member 56 Since the shock is absorbed by the metal cover members Ca and Cb at both ends, the strength of the ends themselves is increased, and the situation where the ends are further damaged can be prevented. it can. Moreover, since this elastic member 56 can also absorb vibrations, it is possible to improve earthquake resistance.

  FIG. 7 shows a precast concrete foundation K according to the second embodiment of the present invention. This is similar to the precast concrete foundation K according to the first embodiment described above, in the panel block 2, the convex portions 3 and the concave portions 4 of the first engaging portion 5 and the second engaging portion 6 are formed in a wave shape. And in the footing 1, the convex part 43 and the recessed part 44 of the 1st fitting part 45 and the 2nd fitting part 46 are formed in the waveform. However, unlike the above, in the panel block 2, the first engagement portion 5 and the second engagement portion 6 are moved in the vertical direction of the panel block 2 due to the engagement relationship between these projections 3 and recesses 4. It is formed to have a relationship that allows and restricts movement in the front and back direction perpendicular to the front and back surfaces. On the other hand, in the footing 1, the first fitting portion 45 and the second fitting portion 46 have a fitting relationship between the convex portion 43 and the concave portion 44 that restricts the vertical movement of the panel block 2. It is formed so as to allow a movement in the front and back direction perpendicular to the direction. Also by this, there exists an effect | action and effect substantially the same as the above.

  FIG. 8 shows a modification of the footing 1. FIG. 8A shows a configuration in which the bottom surface 1a of the footing 1 is formed in a continuous wave shape along the longitudinal direction. FIG. 8B shows a configuration in which the bottom surface of the footing 1 is formed in a continuous wave shape along the width direction. Thereby, the bottom face of the footing bites into the installation surface well, and the installation can be strengthened and stabilized accordingly.

  In each of the above embodiments, the first engagement portion 5 in which the convex portion 3 and the concave portion 4 are continuous is provided at one end of the panel block 2, and the convex portion of the first engagement portion 5 is provided at the other end of the panel block 2. 3 and the second engaging portion 6 in which the concave portion 4 and the convex portion 3 are connected to each other, and the first fitting portion 45 in which the convex portion 43 and the concave portion 44 are continuous at one end of the footing 1. The other end of the footing 1 is provided with a second fitting portion 46 in which the concave portion 44 and the convex portion 43 are connected to engage with the convex portion 43 and the concave portion 44 of the first fitting portion 45, respectively. It is not necessarily limited to this. As shown in FIG. 9, the shape of the engaging portion and the fitting portion according to the first embodiment will be described. The precast concrete foundation K is a panel block as shown in FIG. 9 (a). 2 is provided with a first cover member Ca having a first engaging portion 5 in which a convex portion 3 and a concave portion 4 are continuous, and a convex portion 43 and a concave portion 44 are provided at both end portions 40 and 41 of the footing 1. May be provided and provided with a first fitting portion 45. Further, as shown in FIG. 9B, the precast concrete foundation K is in a relationship of engaging with both end portions 7 and 8 of the panel block 2 with the convex portion 3 and the concave portion 4 of the first engaging portion 5, respectively. A second cover member Cb having a second engaging portion 6 in which the concave portion 4 and the convex portion 3 are continuous is provided, and the both end portions 40 and 41 of the footing 1 are respectively provided on the convex portion 43 and the concave portion 44 of the first fitting portion 45. You may comprise and provide the 2nd fitting part 46 in which the recessed part 44 and the convex part 43 which are in the relationship to engage are continuous. However, in this case, in the construction of the foundation of the building, both shown in FIG. 9A and FIG. 9B are used, and these are alternately arranged in combination. Moreover, it can also combine with the precast concrete foundation K which concerns on said 1st embodiment. In short, the precast concrete foundation K of the present invention includes the first engaging portion 5 in which the convex portion 3 and the concave portion 4 are continuous with one end and the other end of the panel block 2, or the convex portion 3 of the first engaging portion 5 and As long as the second engaging portion 6 in which the concave portion 4 and the convex portion 3 that are respectively engaged with the concave portion 4 are provided, the combination thereof may be determined as appropriate.

  In addition, in the above embodiment, the end portion is formed so that the engagement relationship of the panel block 2 and the fitting relationship of the footing 1 are reversed, but it is not necessarily limited thereto. The engagement relationship of the panel block 2 and the fitting relationship of the footing 1 may be in the same direction, and may be appropriately changed. Further, the footing 1 is not necessarily provided with the first fitting portion 45 and the second fitting portion 46, and may be joined in a plane or may be appropriately changed.

  In the above embodiment, the first cover member Ca or the second cover member Cb made of metal is provided at the one end 7 and the other end 8 of the panel block 2. However, the present invention is not necessarily limited thereto. Of course, a structure in which the concrete background is exposed without providing the first cover member Ca or the second cover member Cb may be used.

K precast concrete foundation 1 footing 1a bottom face 2 panel block 3 convex part 4 concave part 5 first engaging part 6 second engaging part 7 one end part 8 other end part 9 end part Ca first cover member Cb second cover member 20 end Face plate 21 Side plate 22 Top plate 23 Filling space 30 Through hole 31 Connecting plate 32 Insertion hole 33 Bolt 34 Nut 40 One end 41 The other end 43 Convex 44 Recess 45 First fitting 46 Second fitting 50 Fastening Hole 51 Connecting plate 52 Insertion hole 53 Bolt 55 Reinforcement 56 Elastic member

Claims (14)

A first engaging portion having a plate-like panel block standing on the footing and formed by pouring fluid concrete into a mold and having a convex portion and a concave portion at one end and the other end of the panel block, respectively. Or, in a precast concrete foundation provided with a second engaging portion in which the concave portion and the convex portion are in a relationship of engaging with the convex portion and the concave portion of the first engaging portion, respectively.
A precast concrete foundation, wherein the first engaging portion and the second engaging portion are formed so that the continuous convex portions and concave portions have a curved wave shape.   A metal first cover member or second cover member provided on one end and the other end of the panel block so as to cover internal concrete and corresponding to the first engagement portion or the second engagement portion, respectively. The precast concrete foundation according to claim 1, which is provided.   The first cover member and the second cover member, respectively, an end face plate exposed on the end face of the panel block, and a pair of side faces exposed on the front and back surfaces of the panel block that are connected to both sides of the end face plate, A top plate that is connected to the end plate and the pair of side plates and is exposed on the upper surface of the panel block; and a filling space that is filled with concrete during molding inside the end plate, the pair of side plates, and the top plate. The precast concrete foundation according to claim 2, wherein the foundation is formed.   In the first engaging portion and the second engaging portion, the engagement relationship between the convex portions and the concave portions regulates the vertical movement of the panel block and allows the front and back directions to be perpendicular to the front and rear surfaces. The precast concrete foundation according to any one of claims 1 to 3, wherein the foundation is formed in a relation.   In the first engagement portion and the second engagement portion, the engagement relationship between the convex portions and the concave portions allows the vertical movement of the panel block and restricts the movement in the front and back directions perpendicular to the front and back surfaces. The precast concrete foundation according to any one of claims 1 to 3, wherein the foundation is formed in a relation.   6. The method according to claim 1, wherein two or more convex portions of the first engaging portion are provided, and a plurality of concave portions of the second engaging portion are provided corresponding to the convex portions of the first engaging portion. Precast concrete foundation as described in   One end and the other end of the footing are respectively a first fitting portion in which a convex portion and a concave portion are continuous, or a concave portion and a convex portion in a relationship of fitting into the convex portion and the concave portion of the first fitting portion, respectively. A continuous second fitting portion is formed, and the first fitting portion and the second fitting portion are formed such that the continuous convex portion and the concave portion have a curved wave shape. Item 7. A precast concrete foundation according to any one of items 1 to 6.   In the first fitting portion and the second fitting portion, the fitting relationship between the convex portions and the concave portions regulates the vertical movement of the panel block and allows the front and back directions to be perpendicular to the front and back surfaces. The precast concrete foundation according to claim 7, wherein the foundation is formed so as to be in a relation.   In the first fitting portion and the second fitting portion, the fitting relationship between the convex portion and the concave portion allows the vertical movement of the panel block and restricts the movement in the front and back directions perpendicular to the front and back surfaces. The precast concrete foundation according to claim 7, wherein the foundation is formed so as to be in a relation.   Front and back surfaces used to connect the one end and the other end when the adjacent first engaging portion and second engaging portion are engaged with the one end and the other end of the panel block, respectively. The precast concrete foundation according to any one of claims 1 to 9, wherein a through-hole penetrating in a direction is provided.   The precast concrete foundation according to any one of claims 1 to 10, wherein a bottom surface of the footing is formed in a wave shape continuous along a longitudinal direction or a width direction.   A plurality of precast concrete foundations according to any one of claims 1 to 11 are used, and the ends of adjacent precast concrete foundations are arranged so that the first engagement portion and the second engagement portion are engaged with each other. A basic structure of a building, characterized in that these are engaged with each other and connected.   13. The building foundation according to claim 12, wherein an elastic member is interposed between the convex and concave portions of the first engaging portion and the concave and convex portions of the second engaging portion that are engaged with each other. Construction.   Front and back surfaces used to connect the one end and the other end when the adjacent first engaging portion and second engaging portion are engaged with the one end and the other end of the panel block, respectively. A connecting plate having insertion holes corresponding to the respective through holes is installed between the one end portion and the other end portion on the front and back surfaces of the connecting plate. The building foundation structure according to claim 12 or 13, wherein a bolt is inserted into a through hole corresponding thereto and a nut is screwed and fixed.

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