JP2007231596A - Column base fixture, column base fixing structure and column base fixing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a column base fixture, a column base fixing structure and a column base fixing method, capable of restricting the horizontal movement of a building in an earthquake, when a column base is not fixed to the ground. <P>SOLUTION: This column base fixture 1 is composed of a vertical load temporary receiving body 4 detachably installed on the leg part side of a column 2 and constituted so as to transmit a vertical load from its column to the ground 3, and a vertical load support body 5 arranged between a cut surface and a ground surface after cutting a leg part of the column 2 and constituted so as to transmit the vertical load from the column to the ground 3 by receiving the vertical load from the vertical load temporary receiving body 4. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a column base fixing tool, a column base fixing structure, and a column base fixing method applied to a wooden framed house, in particular, a column base of an old private house.

  The foundation structure in a modern wooden framed house is composed of a cloth foundation formed of reinforced concrete and an inverted T-shaped cross section, and a base that is installed on the cloth foundation and fastened with an anchor bolt. A structure in which a pillar is erected on top is common.

  With this configuration, the vertical load of the building and the horizontal force at the time of the earthquake are supported by the cloth foundation constructed on the ground, and the non-uniform settlement and the earthquake resistance of the building can be ensured.

  On the other hand, it goes without saying that the history of the wooden frame construction method is very old, and it can be said that the above-mentioned structural form is a construction method that has become established very recently in view of its long history.

  For example, in an old private house, a cobblestone foundation is provided at the standing position of the pillar, the pillar is erected on the cobblestone foundation, and the legs of the pillar are connected to each other with a cross member to integrate the entire pillar. You can see the structure.

  Such an old private house is precious to the residents because of the use of precious pillars that are not available at the moment, and it is also protected as a cultural asset from the perspective of society as a whole. It has value and should not be rebuilt easily.

JP-A-9-328758

  However, the cobblestone foundation mentioned above is a cobblestone placed on the ground of several tens of centimeters square where the pillar is erected, and the pillar is only erected on the cobblestone foundation, Even if the entire building is firmly integrated by a large number of frame members including the horizontal members mentioned above, the column base and cobblestone foundation are not fixed in the horizontal direction, so it acts on the building during an earthquake. There was a problem that there was a concern that the building would move horizontally due to the horizontal force and come off the cobblestone foundation.

  After such a situation occurs, a large amount of money will be incurred to restore the entire building to its original position, and the building will also move in the vertical direction due to falling off the cobblestone foundation due to the horizontal movement of the building, causing unforeseen compulsion to the building There is also a concern that deformation and stress caused by it will be difficult to recover.

  The present invention has been made in consideration of the above-described circumstances, and a column base fixture and a column base fixing structure capable of restraining horizontal movement of a building during an earthquake when the column base is not fixed to the ground. And it aims at providing a column base fixing method.

  In order to achieve the above object, the column base fixture according to the present invention is detachably attached to the side of the column leg and can transmit a vertical load from the column to the ground. And a vertical load temporary receiver, and the vertical load from the column is received from the vertical load temporary receiver while being installed between the cut surface after the leg portion of the column is cut and the ground surface. It is comprised with the vertical load support body comprised so that it could replace and transmit to the ground.

  The column base fixture according to the present invention includes the vertical load support body provided with a height adjusting mechanism.

  Moreover, the column base fixing tool according to the present invention comprises the vertical load temporary support body composed of a cross member penetrating the post and a pair of vertical members removably connected to both ends of the cross member. It is.

  Moreover, the column base fixing structure according to the present invention is installed between the cut surface and the ground surface after the column leg portion is cut, and the vertical load from the column as described in claim 4. A vertical load support configured to transmit to the ground, and a horizontal movement restraint formed by placing concrete so that at least a part of the vertical load support is embedded.

  Moreover, the column base fixing method according to the present invention is as described in claim 5, wherein a predetermined vertical load temporary support body is attached to the side of the leg portion of the column, and the vertical load from the column is attached to the vertical load temporary support body. , Cut the leg of the column, replace the vertical load from the column with the predetermined vertical load support at the cut surface of the column, remove the vertical load temporary support, and the vertical load The horizontal movement restraining body is formed by placing concrete so that at least a part of the support body is buried.

  Moreover, the column base fixing method according to the present invention is as described in claim 6, wherein a predetermined vertical load temporary support body is attached to the side of the leg portion of the column, and the vertical load from the column is attached to the vertical load temporary support body. Is temporarily cut, the leg portion of the column is cut, and a part of the vertical load from the column is replaced by the cut surface of the column with a predetermined vertical load support, and the rest of the vertical load is supported and A horizontal movement restraint body that supports a horizontal load at the time of an earthquake from a column is formed by placing concrete so that at least a part of the vertical load support body is buried, and after the strength expression of the concrete, the vertical Remove the temporary load holder.

  In the column base fixing tool, the column base fixing structure, and the column base fixing method according to the first aspect of the invention, first, a predetermined vertical load temporary holder is attached to the side of the column leg. The vertical load temporary support body is only required to be detachably attached to the side of the column leg and to be able to transmit the vertical load from the column to the ground. The cross member can be constituted by a cross member penetrating the column and a pair of vertical members removably connected to both ends of the cross member.

  Next, the vertical load from the column is temporarily received by the vertical load temporary support attached to the column, and the leg portion of the column is cut in this state.

  Next, a vertical load support is installed between the cut surface of the column and the ground surface, and the vertical load from the column is received by the vertical load support. The vertical load support body is installed between the cut surface after the leg portion of the column is cut and the ground surface, and the vertical load from the column can be received from the vertical load temporary support body and transmitted to the ground. It only has to be configured.

  Here, if the vertical load support body is provided with a height adjustment mechanism, the height of the column itself can be adjusted, and the vertical load support body height can be adjusted to flow to the vertical load temporary support body. It is possible to easily transfer the vertical load from the pillar to the vertical load support. As a vertical support body provided with a height adjusting mechanism, for example, one similar to a jack base can be adopted.

  Next, the vertical load temporary support body is removed, and then the concrete is cast so that at least a part of the vertical load support body is buried to form a horizontal movement restraint body.

  The concrete to be cast is supported by the horizontal load that is transmitted from the column via the vertical load support in the form of reaction force from the ground, thereby restraining the horizontal movement of the column and eventually the entire building. As long as it functions as a movement restraint body and has such a function, its structure and shape are not limited. For example, it can be formed as a reinforced concrete slab.

  In the column base fixing tool, the column base fixing structure, and the column base fixing method according to the second aspect of the invention, first, a predetermined vertical load temporary receiver is attached to the side of the column leg as in the first aspect of the invention.

  Next, the vertical load from the column is temporarily received by the vertical load temporary holder, and the leg portion of the column is cut in this state.

  Next, a vertical load support is installed between the cut surface of the column and the ground surface, and a part of the vertical load from the column is received by the vertical load support. The vertical load support is installed between the cut surface after the leg of the column is cut and the ground surface, and a part of the vertical load from the column is transferred from the vertical load temporary support body to the ground. What is necessary is just to be comprised so that it can transmit.

  Here, the point that the vertical load support is provided with the height adjusting mechanism is the same as in the first aspect of the invention, so the description thereof is omitted here.

  Next, a horizontal movement restraint body that supports the rest of the vertical load and supports the horizontal load during the earthquake from the column is formed by placing concrete so that at least a part of the vertical load support body is embedded. .

  Next, after the strength of the concrete is developed, the vertical load temporary holder is removed.

  In addition to supporting the remaining vertical loads other than those borne by the vertical load support, the cast concrete forms a horizontal load during an earthquake transmitted from the column via the vertical load support that takes a reaction force from the ground. It functions as a horizontal movement restraint body that restrains the horizontal movement of the pillar, and consequently the entire building, and as long as it has such a function, its structure and shape are not limited, but it is formed as a reinforced concrete slab, for example be able to.

  Hereinafter, embodiments of a column base fixture, a column base fixing structure, and a column base fixing method according to the present invention will be described with reference to the accompanying drawings. Note that components that are substantially the same as those of the prior art are assigned the same reference numerals, and descriptions thereof are omitted.

(First embodiment)

  FIG. 1 is a view showing a column base fixture according to the first embodiment. As can be seen in the figure, the column base fixture 1 according to this embodiment is configured to be detachably attached to the side of the leg portion of the column 2 and to transmit a vertical load from the column to the ground 3. It is installed between the vertical load temporary support body 4 and the cut surface after the leg portion of the column 2 is cut and the ground surface, and the vertical load from the column is received from the vertical load temporary support body 4 and the ground. 3 and a vertical load support 5 configured to be able to transmit to 3.

  As shown in FIG. 2, the vertical load temporary support 4 is penetrated by a through hole (not shown) drilled in the column 2 and is composed of a grooved steel, and is detachable at both ends of the transverse member. And a pair of longitudinal members 9, 9 made of angle steel, and a leg plate 10 is provided on the leg portion of the longitudinal member 9, and a connecting plate 11 is provided on the top thereof. By inserting bolts 14 into bolt holes 12 drilled in the bolts and bolt holes 13 drilled in both ends of the cross member 8, both ends of the cross member 8 are detachably connected to the tops of the vertical members 9, 9, respectively. Be able to.

  As shown in FIG. 3, the vertical load support 5 includes a base 31 in which a male screw member 38 is erected at the center of a rectangular substrate, and an L-shaped column support 35 connected via a hollow member 33. The bottom of the pillar 2 is received at the bottom of the pillar receiver 35. The L-shaped pillar receiver 34 is formed with a long hole 40 through which the male screw member 36 suspended from the bottom of the pillar receiver is inserted. In this state, the side inner surface of the column holder is applied to the side surface of the column 2 and the inner side surface of the column holder 34 is applied to the other side surface of the column 2 so that the bolt hole is formed in the side portion of the column holder 35 in this state. 42 and 35 can be firmly fixed to the leg portions of the pillar 2 by inserting bolts into bolt holes 41 formed in the side portions of the pillar holder 34 and the pillar holder 34.

  Here, since the long hole 40 is formed at the bottom of the column holder 34, the distance between the side of the column holder 34 and the side of the column holder 35 can be adjusted according to the cross-sectional dimension of the column 2. it can. The male screw member 38 has a positive screw 39 and the male screw member 36 has a reverse screw 37, and the hollow member 33 has a female screw corresponding to the positive screw 39 and the reverse screw 37 on the inner surface. The height of the column support 35 can be adjusted by rotating the hollow member 33, and the base 31, the hollow member 33, and the column support 35 function as a height adjustment mechanism.

  In order to fix the leg portion of the column 2 using the column base fixture 1 according to the present embodiment, first, as shown in FIG. The transverse members 8 of the vertical load temporary holder 4 are inserted into the insertion holes, and concrete support plates 45 and 45 are provided on the ground 3 at positions where the vertical members 9 and 9 of the vertical load temporary holder 4 are respectively installed.

  Next, as shown in FIG. 5, the vertical members 9 and 9 of the vertical load temporary support 4 are erected on the concrete support plates 45 and 45, and the tops thereof are connected to both ends of the cross member 8, respectively.

  In connection, the vertical member 9 is struck from the side between the concrete support plate 45 and the cross member 8 and fastened with bolts at predetermined positions.

  If it does in this way, the vertical load from the pillar 2 currently supported by the cobblestone foundation 44 will be temporarily received by the vertical load temporary support body 4, and will be supported by the ground 3 via the concrete support plates 45 and 45. It becomes.

  In this state, as shown in FIG. 6, the leg portion of the pillar 2 is cut and the cobblestone foundation 44 is removed, and a concrete support plate 61 is formed at the ground position below the cobblestone foundation 44.

  Next, as shown in FIG. 7, a vertical load support 5 is installed between the cut surface of the column 2 and the ground surface, and the vertical load from the column 2 is received by the vertical load support.

  When installing the vertical load support 5, the male screw member 38 erected on the base 31 and screwed into one end of the hollow member 33 through the male screw member 36 of the pillar receiver 35 in the elongated hole 40 of the pillar receiver 34. Is screwed into the other end of the hollow member, and the hollow member 33 is turned and inserted under the column 2 with the height of the column receiver 35 lowered, and after positioning the base 31, the hollow member 33 is rotated in the opposite direction. Thus, the column support 35 is raised, and the bottom upper surface of the column support is brought into contact with the bottom surface of the column 2 and the side inner surface is brought into contact with the side surface of the column 2.

  On the other hand, the pillar holder is moved horizontally by using the stroke of the long hole 40 formed in the pillar holder 34, and the pillar holder is pushed up while the side inner surface of the pillar holder 34 is brought into contact with the opposite side surface of the pillar 2. Next, the bolt 73 is sequentially inserted into the bolt hole 42 formed in the column receiver 35, the bolt hole 71 formed in the column 2, and the bolt hole 41 formed in the column receiver 34, and a nut 74 is screwed to the tip thereof. Combine and tighten.

  Next, as shown in FIG. 8, the vertical load temporary receiver 4 is removed. In removing the vertical load temporary support 4, first, the connection between the vertical members 9 and 9 and the cross member 8 is released, and then the vertical members 9 and 9 are removed, and then the cross member 8 is removed from the insertion hole 43 of the column 2. Pull out. The insertion hole 43 of the pillar 2 is appropriately filled with a filler such as a piece of wood.

  Finally, as shown in FIG. 9, reinforced concrete slab 91 as a horizontal movement restraint body is formed by placing concrete so that the vicinity of the bottom lower surface of pillar support 34 of vertical load support 5 becomes the top end. .

  Note that FIG. 9 shows a vertical load support that is installed between the cut surface after the leg portion of the pillar 2 is cut and the ground surface and configured to transmit the vertical load from the pillar 2 to the ground 3. A column base fixing structure comprising a body 5 and a reinforced concrete slab 91 as a horizontal movement restraining body formed by placing concrete so that the lower surface below the bottom of the column support 34 of the vertical load support 5 is buried. 92 is also shown.

  As described above, according to the column base fixing tool 1, the column base fixing structure 92, and the column base fixing method according to the present embodiment, the vertical load acting from the building is replaced with the vertical load instead of the conventional cobblestone foundation 44. Since the support 5 is received and the bottom lower surface of the column holder 34 constituting the vertical load support 5 is embedded in the reinforced concrete slab 91, the horizontal load during an earthquake acting from the building is passed through the vertical load support 5. Thus, the reinforced concrete slab 91 is supported, and thus there is no concern that the entire building moves horizontally during an earthquake as in the prior art, and the earthquake resistance can be improved without rebuilding an old private house.

  That is, the reinforced concrete slab 91 acts as a so-called solid foundation, and the leg portion of the column 2 is firmly fixed to the solid foundation, so that an earthquake resistance comparable to a building constructed according to the current structural standard is provided.

(Second Embodiment)

  Next, a second embodiment will be described. Note that components that are substantially the same as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  FIG. 10 is a view showing a column base fixture according to the second embodiment. As can be seen from the figure, the column base fixture 1 ′ according to the present embodiment is detachably attached to the side of the leg portion of the column 2 and configured to transmit a vertical load from the column to the ground 3. The vertical load temporary receiver 4a and the vertical load temporary receiver 4a are installed between the cut surface after the leg portion of the column 2 is cut and the ground surface and a part of the vertical load from the column is received from the vertical load temporary receiver 4a. It is comprised with the vertical load support body 5 comprised so that it could replace and can be transmitted to the ground 3.

  As shown in FIG. 11, the vertical load temporary receiving body 4a is penetrated by a through-hole (not shown) drilled in the column 2 and is composed of a cross-section steel and detachable at both ends of the transverse member. And a pair of longitudinal members 9 'and 9' connected to each other.

  The longitudinal member 9 'is composed of a lower longitudinal member 9b and an upper longitudinal member 9a connected to the lower longitudinal member via a connecting member 9c. The lower longitudinal member 9b, the connecting member 9c and the upper longitudinal member 9a are angle steel. It consists of

  Here, among the vertical members 9 ′, the leg plate 10 is provided at the non-connection side end portion of the lower vertical member 9b, and the connection plate 11 is provided at the non-connection side end portion of the upper vertical member 9a, By inserting bolts 14 into bolt holes 12 drilled in the connecting plate and bolt holes 13 drilled at both ends of the cross member 8, both ends of the cross member 8 are respectively connected to the tops of the vertical members 9 'and 9'. It can be detachably connected.

  The vertical load support body 5 which concerns on 2nd Embodiment does not support the vertical load from a building only by the vertical load support body 5, but supports only the part, and the point which bears the remainder to the reinforced concrete slab 91 However, since the structure and shape thereof are the same as those of the first embodiment, the same reference numerals are given to the second embodiment, and the description thereof is omitted.

  In order to fix the leg portion of the column 2 using the column base fixture 1 ′ according to the present embodiment, first, as shown in FIG. The transverse members 8 of the vertical load temporary holder 4a are inserted into the insertion holes, and the concrete support plates 45, 45 are placed on the ground 3 at positions where the vertical members 9 ', 9' of the vertical load temporary holder 4a are respectively installed. Provide. The installation procedure of the vertical load temporary receiver 4a is different from that of the first embodiment only in that the vertical member 9 'is an assembly material, and the installation procedure itself is the same as that of the first embodiment. Then, the explanation is omitted.

  Next, in the state where the vertical load from the pillar 2 is provisionally received by the vertical load provisional body 4a, the leg portion of the pillar 2 is cut as shown in FIG. Form.

  Next, as shown in FIG. 14, the vertical load support 5 is installed between the cut surface of the column 2 and the ground surface, and a part of the vertical load from the column 2 is exchanged by the vertical load support.

  Regarding the installation procedure of the vertical load support 5, the vertical load from the building is not supported only by the vertical load support 5, but only a part thereof is supported and the rest is borne by the reinforced concrete slab 91. Although different from the first embodiment, the installation procedure itself is the same as that of the first embodiment, and the description thereof is omitted here.

  Next, as shown in FIG. 15, reinforced concrete slab 91 as a horizontal movement restraint body is formed by placing concrete so that the bottom lower surface of pillar support 34 of vertical load support 5 becomes the top end. .

  Finally, as shown in FIG. 16, the vertical load provisional receiving body 4 is removed. When removing the vertical load temporary holder 4, first, the longitudinal member 9 ′ is disassembled, the connecting member 9 c and the upper longitudinal member 9 a are removed, and the transverse member 8 is pulled out from the insertion hole 43 of the column 2. The insertion hole 43 of the pillar 2 is appropriately filled with a filler such as a piece of wood.

  In the present embodiment, the lower vertical member 9b is left in the reinforced concrete slab 91.

  FIG. 16 shows a vertical load that is installed between the cut surface after the leg portion of the column 2 is cut and the ground surface and is configured to transmit a part of the vertical load from the column 2 to the ground 3. A column base fixed comprising a support body 5 and a reinforced concrete slab 91 as a horizontal movement restraint body formed by placing concrete so that a portion below the bottom lower surface of the column support 34 of the vertical load support body 5 is buried. It also shows the structure 92 '.

  As described above, according to the column base fixing tool 1 ′, the column base fixing structure 92 ′, and the column base fixing method according to the present embodiment, the vertical load acting from the building is replaced with the conventional cobblestone foundation 44. Since the vertical load support 5 and the reinforced concrete slab 91 are received, and the bottom bottom surface of the column holder 34 constituting the vertical load support 5 is embedded in the reinforced concrete slab 91, the horizontal load acting from the building is vertical. The reinforced concrete slab 91 will be supported via the load support 5, thus eliminating the concern that the entire building will move horizontally during an earthquake as in the past, and greatly improving its earthquake resistance without rebuilding old houses. It becomes possible to improve.

  That is, the reinforced concrete slab 91 acts as a so-called solid foundation, and the leg portion of the column 2 is firmly fixed to the solid foundation, so that an earthquake resistance comparable to a building constructed according to the current structural standard is provided.

The front view of the column base fixing tool 1 which concerns on 1st Embodiment. The exploded view of the vertical load temporary support body 4. FIG. The exploded perspective view of the vertical load support body 5. FIG. It is the figure which showed the procedure which fixes the leg part of the pillar 2 using the column base fixing tool 1, (a) is a front view, (b) is an arrow line view of an AA line direction. The figure which showed the procedure which fixes the leg part of the pillar 2 continuously. The figure which showed the procedure which fixes the leg part of the pillar 2 continuously. The figure which showed the procedure which fixes the leg part of the pillar 2 continuously. The figure which showed the procedure which fixes the leg part of the pillar 2 continuously. The figure which showed the procedure which fixes the leg part of the pillar 2 continuously. The front view of the column base fixing tool 1 'which concerns on 2nd Embodiment. The exploded view of the vertical load temporary support body 4a. The figure which showed the procedure which fixes the leg part of the column 2 using the column base fixing tool 1a. The figure which showed the procedure which fixes the leg part of the pillar 2 continuously. The figure which showed the procedure which fixes the leg part of the pillar 2 continuously. The figure which showed the procedure which fixes the leg part of the pillar 2 continuously. The figure which showed the procedure which fixes the leg part of the pillar 2 continuously.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,1a Column base fixture 2 Column 3 Ground 4,4a Vertical load temporary support body 5 Vertical load support body 8 Cross member 9, 9 'Vertical member 31 Base (height adjustment mechanism)
33 Hollow member (height adjustment mechanism)
35 Column holder (height adjustment mechanism)
91 Reinforced concrete slab
(Horizontal movement restraint)

Claims (6)

A vertical load temporary support body that is detachably attached to the side of the leg of the column and configured to transmit a vertical load from the column to the ground, and a cut surface after the leg of the column is cut A column comprising a vertical load support configured to be installed between a ground surface and configured to transmit a vertical load from the column from the vertical load temporary support body to the ground. Leg fixture. The column base fixture according to claim 1, wherein the vertical load support is provided with a height adjusting mechanism. The column base fixture according to claim 1, wherein the vertical load temporary support body includes a cross member penetrating the pillar and a pair of vertical members detachably connected to both ends of the cross member. A vertical load support that is installed between the cut surface after the leg portion of the column is cut and the ground surface and configured to transmit a vertical load from the column to the ground, and the vertical load support A column base fixing structure characterized by comprising a horizontal movement restraining body formed by placing concrete so that at least a part of the concrete is buried. A predetermined vertical load temporary support body is attached to the side of the leg portion of the column, the vertical load temporary support body temporarily receives the vertical load from the column, the leg portion of the column is cut, and the predetermined vertical load support body The vertical load from the column is replaced by the cut surface of the column, the vertical load temporary support is removed, and concrete is placed so that at least a part of the vertical load support is embedded and moved horizontally. A column base fixing method comprising forming a restraining body. A predetermined vertical load temporary support body is attached to the side of the leg portion of the column, the vertical load temporary support body temporarily receives the vertical load from the column, the leg portion of the column is cut, and the predetermined vertical load support body A part of the vertical load from the column is received by the cut surface of the column, and the horizontal movement restraint body that supports the rest of the vertical load and supports the horizontal load during the earthquake from the column is supported by the vertical load. A column base fixing method, comprising: forming concrete so that at least a part of the body is buried, and removing the vertical load temporary support body after the strength of the concrete is developed.

Images