JP4297854B2 - Load provision method - Google Patents

Load provision method Download PDF

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JP4297854B2
JP4297854B2 JP2004266253A JP2004266253A JP4297854B2 JP 4297854 B2 JP4297854 B2 JP 4297854B2 JP 2004266253 A JP2004266253 A JP 2004266253A JP 2004266253 A JP2004266253 A JP 2004266253A JP 4297854 B2 JP4297854 B2 JP 4297854B2
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load
temporary
column
receiving
members
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JP2006083515A (en
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実 大倉
誠 貞永
斉 清水
康司 夜船
登 西垣
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Takenaka Corp
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Description

本発明は、既設の柱の中間部を切断して免震装置を設置するにあたり、前記柱の切断予定箇所に作用する荷重を仮受けする荷重仮受け方法に関する。 The present invention, when installing a seismic isolation device by cutting the middle portion of the existing pillar relates to load provisional How to Get method for receiving a load temporary acting on cut portion of said post.

従来、この種の荷重仮受け方法としては、図８に示すように、免震装置２を設置する作業空間を柱１の周りに確保した状態で、柱の周囲に梁６Ａから床梁６Ｂにわたって前記柱１とは独立した複数の仮受け柱２０を設置し、これら仮受け柱２０によって、本来、柱１に作用するはずの荷重を仮受けするもの（以後、第１従来例という）があった（例えば、特許文献１参照）。また、この方法において、梁や床梁の強度が不足する場合には、事前に梁や床梁の補強を行っておく必要がある。
また、別の方法としては、梁や床梁に荷重を作用させないものとして、図９に示すように、前記柱１の切断予定箇所Ｓの上側と下側とに、横に張り出す状態に仮受け張出部材４をそれぞれ設置し、上下の仮受け張出部材４にわたってジャッキ装置５を取り付けて、この前記ジャッキ装置５を突っ張らせることで、上下の仮受け張出部材４を介して、柱１の中間部に作用する荷重を仮受けさせるもの（以後、第２従来例という）があった（例えば、特許文献２〜５参照）。 Conventionally, as this type of temporary load receiving method, as shown in FIG. 8, the work space in which the seismic isolation device 2 is installed is secured around the column 1 and extends from the beam 6 </ b> A to the floor beam 6 </ b> B around the column. A plurality of temporary receiving columns 20 independent from the column 1 are installed, and these temporary receiving columns 20 temporarily receive a load that should originally act on the column 1 (hereinafter referred to as a first conventional example). (For example, see Patent Document 1). Further, in this method, if the strength of the beam or floor beam is insufficient, it is necessary to reinforce the beam or floor beam in advance.
As another method, assuming that no load is applied to the beam or floor beam, as shown in FIG. 9, a temporary projecting state is provided on the upper side and the lower side of the planned cutting site S of the column 1. Each of the support overhanging members 4 is installed, the jack device 5 is attached over the upper and lower temporary support overhanging members 4, and the jack device 5 is stretched, so that the column is inserted through the upper and lower temporary support overhanging members 4. There is one that temporarily receives a load acting on the intermediate portion of 1 (hereinafter referred to as a second conventional example) (see, for example, Patent Documents 2 to 5).

また、この種の荷重仮受け装置としては、上述のとおり、上下一対の仮受け張出部材と、それらにわたって設置するジャッキ装置とを設けたものがあった。   Moreover, as this kind of temporary load receiving device, as described above, there is one provided with a pair of upper and lower temporary receiving extending members and a jack device installed over them.

特開２００１−３１１３１４号公報（図１）JP 2001-311314 A (FIG. 1) 特開平４−２３１５５０号公報（図１）JP-A-4-231550 (FIG. 1) 特開平１０−２５９６６６号公報（図３〜６）JP-A-10-259666 (FIGS. 3-6) 特開平１１−１０７５４０号公報（図４）Japanese Patent Laid-Open No. 11-107540 (FIG. 4) 特開２００３−１６１０４４号公報（図１）Japanese Patent Laying-Open No. 2003-161044 (FIG. 1)

上述した従来の荷重仮受け技術に関して、特に、前記第１従来例によれば、切断対象の柱に作用していた荷重を、梁で受けるわけであるから、梁そのものに仮受け荷重を受けるだけの充分な強度が必要となる。しかし、対象となる建物によっては、階高の制限から梁成を大きくとれず、仮受け荷重に対して梁の強度が不足することがあったり、梁の補強も満足に実施できないことも少なくない。
従って、前記第１従来例は、梁の強度が確保できない場合には採用できない危険性があり、採用の自由度が低い問題点がある。言い換えれば、汎用性に欠けるという問題点がある。
一方、前記第２従来例によれば、梁に仮受け荷重を伝達させないから、前記第１従来例の問題は解消できるものの、同様の問題点が、仮受け張出部材の大断面化と言った形で現れる。即ち、仮受け張出部材は、力学上、基端部を柱に固定した片持ち梁の扱いとなり、上述の梁の場合より、さらに大きな成が必要となり易い。従って、天井高さが低い建物に対しては、非常に採用し難くなり、第１従来例と同様に、汎用性に欠けるという問題点がある。 Regarding the conventional load provisional technology described above, in particular, according to the first conventional example, the beam acting on the column to be cut is received by the beam, so only the provisional load is received by the beam itself. Sufficient strength is required. However, depending on the target building, the beam formation may not be large due to the restriction of the floor height, the beam strength may be insufficient with respect to the provisional load, and the beam reinforcement may not be satisfactorily performed. .
Therefore, the first conventional example has a risk that it cannot be adopted if the strength of the beam cannot be secured, and there is a problem that the degree of freedom of adoption is low. In other words, there is a problem of lack of versatility.
On the other hand, according to the second conventional example, since the temporary receiving load is not transmitted to the beam, the problem of the first conventional example can be solved, but the same problem is that the provisional extending member has a large cross section. Appears in the form. In other words, the temporary support projecting member is handled as a cantilever beam having a base end fixed to a column in terms of dynamics, and is more likely to be larger than the above-described beam. Therefore, it is very difficult to adopt for a building with a low ceiling height, and there is a problem that it lacks versatility like the first conventional example.

従って、本発明の目的は、上記問題点を解消し、色々な環境に対応して柱の荷重の仮受けを実施できる荷重仮受け方法を提供するところにある。   Therefore, an object of the present invention is to provide a load provision method that can solve the above-described problems and can perform provisional reception of a column load corresponding to various environments.

本発明の第１の特徴手段は、既設の柱の中間部を切断して免震装置を設置するにあたり、前記柱の切断予定箇所に作用する荷重を仮受けする荷重仮受け方法において、前記柱の切断予定箇所の上側と下側とに、横に張り出す状態に仮受け張出部材をそれぞれ設置し、上下の仮受け張出部材にわたってジャッキ装置を取り付け、前記ジャッキ装置で両仮受け張出部材間に突っ張り力を作用させた後、上の仮受け張出部材とその上の梁との間、及び、下の仮受け張出部材とその下の梁との間に、荷重伝達自在な状態に荷重伝達部材をそれぞれ介在させ、その後に前記ジャッキ装置を更に伸長操作するところにある。 The first characteristic means of the present invention is a load provisional receiving method for provisionally receiving a load acting on a planned cutting position of the column when the seismic isolation device is installed by cutting an intermediate part of an existing column. Temporary receiving overhanging members are installed on the upper and lower sides of the planned cutting location of each, and a jack device is attached over the upper and lower temporary receiving overhanging members. After applying a tensile force between the members, it is possible to transmit a load between the upper temporary support member and the upper beam, and between the lower temporary support member and the lower beam. state, respectively are interposed load transmitting member is thereafter further extended operating the jack device to be Rutokoro.

本発明の第１の特徴手段によれば、予め、ジャッキ装置で両仮受け張出部材間に突っ張り力を作用させることで、柱の上端部・上の仮受け張出部材・ジャッキ装置・下の仮受け張出部材・柱の下端部に連なる第１荷重分担経路が構築され、ジャッキ装置による突っ張り力に相当した仮受け分担荷重を、前記第１荷重分担経路で受け持つことが可能となる。その後、上の仮受け張出部材とその上の梁との間、及び、下の仮受け張出部材とその下の梁との間に、荷重伝達自在な状態に荷重伝達部材をそれぞれ介在させることで、上の梁・上の荷重伝達部材・上の仮受け張出部材・ジャッキ装置・下の仮受け張出部材・下の荷重伝達部材・下の梁に連なる第２荷重分担経路が構築される。従って、柱の切断に伴っては、前記第１荷重分担経路と第２荷重分担経路との両方の経路で、柱に作用する荷重を分担して仮受けすることが可能となる。
即ち、梁に仮受け荷重を受けるだけの強度が確保できない場合でも、不足する仮受け荷重分を、前記第１荷重分担経路の各部材によって受けることが可能となり、例えば、階高の制限から梁成を大きくとれないような建物でも、柱荷重を仮受けできるようになる。
一方、仮受け張出部材に充分な強度が確保できないような場合でも、不足する仮受け荷重分を、前記第２荷重分担経路の各部材によって受けることが可能となり、例えば、天井高さが低い等の理由で仮受け張出部材の成を小さくせざるを得ない建物でも、柱荷重を仮受けできるようになる。
そして、荷重伝達部材に、例えばジャッキ機構のような伸縮機構を備えてないものを採用しても、前記ジャッキ装置による更なる伸長操作によって荷重伝達部材と梁や仮受け張出部材との密着性を確保することが可能となり、より好ましい状態での柱荷重の仮受けを行うことが可能となる。また、ジャッキ装置の突っ張り力を調整することで、仮受け荷重を所定値に調整することが可能となる。
従って、色々な環境に対応して柱の荷重の仮受けを実施できるようになり、柱を切断した後に免震装置を取り付ける等の免震化工事に役立てることが可能なる。 According to the first feature means of the present invention, by applying a tension force between the temporary receiving extension members with the jack device in advance, the temporary receiving extension member, the jack device, the lower end of the column, A first load sharing path that is connected to the lower end portion of the temporary receiving overhanging member / column is constructed, and a temporary receiving shared load corresponding to a tension force by the jack device can be received by the first load sharing path. After that, the load transmitting member is interposed between the upper temporary support projecting member and the upper beam and between the lower temporary support projecting member and the lower beam so that the load can be transmitted. Thus, the second load sharing path connected to the upper beam, the upper load transmission member, the upper temporary receiving extension member, the jack device, the lower temporary receiving extension member, the lower load transmission member, and the lower beam is constructed. Is done. Therefore, along with the cutting of the column, it is possible to share and temporarily receive the load acting on the column by both the first load sharing route and the second load sharing route.
That is, even if the strength sufficient to receive the provisional load on the beam cannot be ensured, the insufficient provisional load can be received by each member of the first load sharing path. Even buildings that can't take a great deal can receive column loads temporarily.
On the other hand, even when sufficient strength cannot be ensured in the temporary support projecting member, it becomes possible to receive the insufficient temporary support load by each member of the second load sharing path, for example, the ceiling height is low. For example, a column load can be temporarily received even in a building in which the provisional extension member has to be made smaller.
Even if a load transmission member that does not include an expansion / contraction mechanism such as a jack mechanism is used, the adhesion between the load transmission member and the beam or provisional overhang member is further increased by the extension operation by the jack device. It is possible to secure the column load in a more preferable state. In addition, the provisional load can be adjusted to a predetermined value by adjusting the tension force of the jack device.
Accordingly, it becomes possible to temporarily receive the load of the column corresponding to various environments, and it can be used for seismic isolation work such as attaching a seismic isolation device after cutting the column.

本発明の第２の特徴手段は、既設の柱の中間部を切断して免震装置を設置するにあたり、前記柱の切断予定箇所に作用する荷重を仮受けする荷重仮受け方法において、前記柱の切断予定箇所の上側と下側とに、横に張り出す状態に仮受け張出部材をそれぞれ設置し、上下の仮受け張出部材にわたってジャッキ装置を取り付け、前記ジャッキ装置で両仮受け張出部材間に突っ張り力を作用させた後、上の仮受け張出部材とその上の梁との間、又は、下の仮受け張出部材とその下の梁との間に、荷重伝達自在な状態に荷重伝達部材を介在させ、その後に前記ジャッキ装置を更に伸長操作するところにある。 The second characteristic means of the present invention is the load temporary receiving method for temporarily receiving the load acting on the planned cutting position of the column when the seismic isolation device is installed by cutting an intermediate portion of the existing column. Temporary receiving overhanging members are installed on the upper and lower sides of the planned cutting location of each, and a jack device is attached over the upper and lower temporary receiving overhanging members. After applying a tensile force between the members, the load can be transmitted between the upper temporary support member and the upper beam, or between the lower temporary support member and the lower beam. state is interposed load transmitting member is thereafter further extended operating the jack device to be Rutokoro.

本発明の第２の特徴手段によれば、予め、ジャッキ装置で両仮受け張出部材間に突っ張り力を作用させることで、柱の上端部・上の仮受け張出部材・ジャッキ装置・下の仮受け張出部材・柱の下端部に連なる第１荷重分担経路が構築され、ジャッキ装置による突っ張り力に相当した仮受け分担荷重を、前記第１荷重分担経路で受け持つことが可能となる。その後、上の仮受け張出部材とその上の梁との間（又は、下の仮受け張出部材とその下の梁との間）に、荷重伝達自在な状態に荷重伝達部材を介在させることで、上の梁と上の荷重伝達部材・上の仮受け張出部材・ジャッキ装置・下の仮受け張出部材・柱の下端部（又は、柱の上端部・上の仮受け張出部材・ジャッキ装置・下の仮受け張出部材・下の荷重伝達部材と下の梁）に連なる第２荷重分担経路が構築される。従って、柱の切断に伴っては、前記第１荷重分担経路と第２荷重分担経路との両方の経路で、柱に作用する荷重を分担して仮受けすることが可能となる。
即ち、下の梁（又は、上の梁）に仮受け荷重を受けるだけの強度が確保できない場合でも、不足する仮受け荷重分を、前記第１荷重分担経路の各部材によって受けることが可能となり、例えば、階高の制限から下の梁（又は、上の梁）の梁成を大きくとれないような建物でも、柱荷重を仮受けできるようになる。
一方、上の仮受け張出部材（又は、下の仮受け張出部材）に充分な強度が確保できないような場合でも、不足する仮受け荷重分を、前記第２荷重分担経路の各部材によって受けることが可能となり、例えば、天井高さが低い等の理由で上の仮受け張出部材（又は、下の仮受け張出部材）の成を小さくせざるを得ない建物でも、柱荷重を仮受けできるようになる。
そして、荷重伝達部材に、例えばジャッキ機構のような伸縮機構を備えてないものを採用しても、前記ジャッキ装置による更なる伸長操作によって荷重伝達部材と梁や仮受け張出部材との密着性を確保することが可能となり、より好ましい状態での柱荷重の仮受けを行うことが可能となる。また、ジャッキ装置の突っ張り力を調整することで、仮受け荷重を所定値に調整することが可能となる。
従って、色々な環境に対応して柱の荷重の仮受けを実施できるようになり、柱を切断した後に免震装置を取り付ける等の免震化工事に役立てることが可能なる。 According to the second characteristic means of the present invention, by applying a tension force between the temporary receiving extension members in the jack device in advance, the temporary receiving extension member, jack device, lower A first load sharing path that is connected to the lower end portion of the temporary receiving overhanging member / column is constructed, and a temporary receiving shared load corresponding to a tension force by the jack device can be received by the first load sharing path. After that, the load transmitting member is interposed between the upper temporary support projecting member and the upper beam (or between the lower temporary support projecting member and the lower beam) so that the load can be transmitted. The upper beam and the upper load transmission member, the upper temporary receiving extension member, the jack device, the lower temporary receiving extension member, the lower end of the column (or the upper end of the column, the temporary receiving extension A second load sharing path that is continuous to the member, the jack device, the lower temporary support projecting member, the lower load transmission member, and the lower beam is constructed. Therefore, along with the cutting of the column, it is possible to share and temporarily receive the load acting on the column by both the first load sharing route and the second load sharing route.
That is, even when the lower beam (or the upper beam) is not strong enough to receive the temporary load, the insufficient temporary load can be received by each member of the first load sharing path. For example, a column load can be temporarily received even in a building in which the beam of the lower beam (or the upper beam) cannot be made large due to the floor height limitation.
On the other hand, even when sufficient strength cannot be ensured for the upper temporary support overhang member (or the lower temporary support overhang member), the insufficient temporary load is reduced by each member of the second load sharing path. For example, even in buildings where the upper provisional overhanging member (or the lower temporary overhanging member) has to be made smaller because the ceiling height is low, etc. You will be able to accept it temporarily.
Even if a load transmission member that does not include an expansion / contraction mechanism such as a jack mechanism is used, the adhesion between the load transmission member and the beam or provisional overhang member is further increased by the extension operation by the jack device. It is possible to secure the column load in a more preferable state. In addition, the provisional load can be adjusted to a predetermined value by adjusting the tension force of the jack device.
Accordingly, it becomes possible to temporarily receive the load of the column corresponding to various environments, and it can be used for seismic isolation work such as attaching a seismic isolation device after cutting the column.

本発明の第３の特徴手段は、既設の柱の中間部を切断して免震装置を設置するにあたり、前記柱の切断予定箇所に作用する荷重を仮受けする荷重仮受け方法において、前記柱の切断予定箇所の上側と下側とに、横に張り出す状態に仮受け張出部材をそれぞれ設置し、上下の仮受け張出部材にわたってジャッキ装置を取り付け、上の仮受け張出部材とその上の梁との間、及び、下の仮受け張出部材とその下の梁との間に、荷重伝達自在な状態に荷重伝達部材をそれぞれ介在させた後、前記ジャッキ装置で両仮受け張出部材間に突っ張り力を作用させるところにある。 According to a third feature of the present invention, in the load temporary receiving method for temporarily receiving a load acting on a planned cutting position of the column when the seismic isolation device is installed by cutting an intermediate portion of the existing column, Temporary receiving overhanging members are installed on the upper side and the lower side of the planned cutting portion of each of the above, and a jack device is attached over the upper and lower temporary receiving overhanging members. After interposing a load transmitting member between the upper beam and between the lower temporary support projecting member and the lower beam so that the load can be transmitted, both the temporary support members are extended by the jack device. There is a place where a tension force is applied between the protruding members.

本発明の第３の特徴手段によれば、ジャッキ装置で両仮受け張出部材間に突っ張り力を作用させることにより、柱の上端部・上の仮受け張出部材・ジャッキ装置・下の仮受け張出部材・柱の下端部に連なる第１荷重分担経路と、上の梁・上の荷重伝達部材・上の仮受け張出部材・ジャッキ装置・下の仮受け張出部材・下の荷重伝達部材・下の梁に連なる第２荷重分担経路とが共に構築される。従って、柱の切断に伴っては、前記第１荷重分担経路と第２荷重分担経路との両方の経路で、柱に作用する荷重を分担して仮受けすることが可能となる。
即ち、梁に仮受け荷重を受けるだけの強度が確保できない場合でも、不足する仮受け荷重分を、前記第１荷重分担経路の各部材によって受けることが可能となり、例えば、階高の制限から梁成を大きくとれないような建物でも、柱荷重を仮受けできるようになる。
一方、仮受け張出部材に充分な強度が確保できないような場合でも、不足する仮受け荷重分を、前記第２荷重分担経路の各部材によって受けることが可能となり、例えば、天井高さが低い等の理由で仮受け張出部材の成を小さくせざるを得ない建物でも、柱荷重を仮受けできるようになる。
従って、色々な環境に対応して柱の荷重の仮受けを実施できるようになり、柱を切断した後に免震装置を取り付ける等の免震化工事に役立てることが可能なる。 According to the third characteristic means of the present invention, by applying a tension force between the temporary receiving extension members in the jack device, the temporary receiving extension member, the upper jacking device, the lower temporary extension member, the upper end portion of the column. The first load-sharing path that continues to the lower end of the receiving extension member / column, the upper beam, the upper load transmission member, the upper temporary extension member, the jack device, the lower temporary extension member, and the lower load Both the transmission member and the second load sharing path connected to the lower beam are constructed. Therefore, along with the cutting of the column, it is possible to share and temporarily receive the load acting on the column by both the first load sharing route and the second load sharing route.
That is, even if the strength sufficient to receive the provisional load on the beam cannot be ensured, the insufficient provisional load can be received by each member of the first load sharing path. Even buildings that can't take a great deal can receive column loads temporarily.
On the other hand, even when sufficient strength cannot be ensured in the temporary support projecting member, it becomes possible to receive the insufficient temporary support load by each member of the second load sharing path, for example, the ceiling height is low. For example, a column load can be temporarily received even in a building in which the provisional extension member has to be made smaller.
Accordingly, it becomes possible to temporarily receive the load of the column corresponding to various environments, and it can be used for seismic isolation work such as attaching a seismic isolation device after cutting the column.

本発明の第４の特徴手段は、既設の柱の中間部を切断して免震装置を設置するにあたり、前記柱の切断予定箇所に作用する荷重を仮受けする荷重仮受け方法において、前記柱の切断予定箇所の上側と下側とに、横に張り出す状態に仮受け張出部材をそれぞれ設置し、上下の仮受け張出部材にわたってジャッキ装置を取り付け、上の仮受け張出部材とその上の梁との間、又は、下の仮受け張出部材とその下の梁との間に、荷重伝達自在な状態に荷重伝達部材を介在させた後、前記ジャッキ装置で両仮受け張出部材間に突っ張り力を作用させるところにある。 According to a fourth feature of the present invention, in the load provisional method for provisionally receiving a load acting on a planned cutting position of the column when the seismic isolation device is installed by cutting an intermediate part of the existing column, Temporary receiving overhanging members are installed on the upper side and the lower side of the planned cutting portion of each of the above, and a jack device is attached over the upper and lower temporary receiving overhanging members. After the load transmitting member is interposed between the upper beam or between the lower temporary support projecting member and the lower beam so that the load can be transmitted, both the temporary support projects are performed by the jack device. There is a place where a tensile force is applied between the members.

本発明の第４の特徴手段によれば、ジャッキ装置で両仮受け張出部材間に突っ張り力を作用させることにより、柱の上端部・上の仮受け張出部材・ジャッキ装置・下の仮受け張出部材・柱の下端部に連なる第１荷重分担経路と、上の梁と上の荷重伝達部材・上の仮受け張出部材・ジャッキ装置・下の仮受け張出部材・柱の下端部（又は、柱の上端部・上の仮受け張出部材・ジャッキ装置・下の仮受け張出部材・下の荷重伝達部材と下の梁）に連なる第２荷重分担経路が構築される。従って、柱の切断に伴っては、前記第１荷重分担経路と第２荷重分担経路との両方の経路で、柱に作用する荷重を分担して仮受けすることが可能となる。
即ち、下の梁（又は、上の梁）に仮受け荷重を受けるだけの強度が確保できない場合でも、不足する仮受け荷重分を、前記第１荷重分担経路の各部材によって受けることが可能となり、例えば、階高の制限から下の梁（又は、上の梁）の梁成を大きくとれないような建物でも、柱荷重を仮受けできるようになる。
一方、上の仮受け張出部材（又は、下の仮受け張出部材）に充分な強度が確保できないような場合でも、不足する仮受け荷重分を、前記第２荷重分担経路の各部材によって受けることが可能となり、例えば、天井高さが低い等の理由で上の仮受け張出部材（又は、下の仮受け張出部材）の成を小さくせざるを得ない建物でも、柱荷重を仮受けできるようになる。
従って、色々な環境に対応して柱の荷重の仮受けを実施できるようになり、柱を切断した後に免震装置を取り付ける等の免震化工事に役立てることが可能なる。 According to the fourth characteristic means of the present invention, the jack device applies a tensile force between the temporary support projecting members, so that the upper end portion of the column, the upper temporary support member, the jack device, and the lower temporary support member. The first load sharing path connected to the lower end of the support member / column, the upper beam and the upper load transmission member, the upper temporary support member, the jack device, the lower temporary support member, and the lower end of the column A second load sharing path that is continuous with the section (or the upper end of the column, the upper temporary support member, the jack device, the lower temporary support member, the lower load transmission member and the lower beam) is constructed. Therefore, along with the cutting of the column, it is possible to share and temporarily receive the load acting on the column by both the first load sharing route and the second load sharing route.
That is, even when the lower beam (or the upper beam) is not strong enough to receive the temporary load, the insufficient temporary load can be received by each member of the first load sharing path. For example, a column load can be temporarily received even in a building in which the beam of the lower beam (or the upper beam) cannot be made large due to the floor height limitation.
On the other hand, even when sufficient strength cannot be ensured for the upper temporary support overhang member (or the lower temporary support overhang member), the insufficient temporary load is reduced by each member of the second load sharing path. For example, even in buildings where the upper provisional overhanging member (or the lower temporary overhanging member) has to be made smaller because the ceiling height is low, etc. You will be able to accept it temporarily.
Accordingly, it becomes possible to temporarily receive the load of the column corresponding to various environments, and it can be used for seismic isolation work such as attaching a seismic isolation device after cutting the column.

以下に本発明の実施の形態を図面に基づいて説明する。尚、図面において従来例と同一の符号で表示した部分は、同一又は相当の部分を示している。   Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the parts indicated by the same reference numerals as those in the conventional example indicate the same or corresponding parts.

図１、図２は、本発明の荷重仮受け方法の一実施法によって柱１の荷重を仮受けしている建物要部の状態を示すもので、その荷重仮受け状態で、柱１の中間部を切断除去し、その除去跡に、免震装置２を設置して一体化を図ることで建物の免震化を叶えることが可能となる。そして、荷重の仮受けに伴っては、本発明の荷重仮受け装置３を、柱１及び梁６にわたって設置することで実施される。   FIG. 1 and FIG. 2 show the state of the main part of the building that is temporarily receiving the load of the column 1 by one embodiment of the load temporary receiving method of the present invention. It is possible to achieve seismic isolation of the building by cutting and removing the part, and installing the seismic isolation device 2 at the removal trace to achieve integration. And along with the temporary load receiving, the load temporary receiving device 3 of the present invention is installed across the column 1 and the beam 6.

荷重仮受け方法について説明する。
［１］ 図４（イ）に示すように、柱１の切断予定箇所Ｓの上側と下側とに、横に張り出す状態に仮受け張出部材４をそれぞれ設置する。
［２］ 上下の仮受け張出部材４にわたってジャッキ装置５を取り付けて、図４（ロ）に示すように、そのジャッキ装置５で両仮受け張出部材４間に突っ張り力を作用させる。
［３］ 図５（ハ）に示すように、上の仮受け張出部材４Ａとその上の梁６Ａとの間、及び、下の仮受け張出部材４Ｂとその下の梁６Ｂとの間に、荷重伝達自在な状態に荷重伝達部材７をそれぞれ介在させて設置する。 A method for temporarily receiving the load will be described.
[1] As shown in FIG. 4 (a), the temporary receiving projecting members 4 are respectively installed in a state of projecting sideways on the upper side and the lower side of the planned cutting site S of the column 1.
[2] The jack device 5 is attached over the upper and lower temporary support projecting members 4, and as shown in FIG. 4 (b), a thrust force is applied between the temporary support projecting members 4 by the jack device 5.
[3] As shown in FIG. 5 (C), between the upper temporary support member 4A and the upper beam 6A, and between the lower temporary support member 4B and the lower beam 6B. In addition, the load transmitting member 7 is interposed in a state where the load can be transmitted.

以上の荷重仮受け方法によれば、予め、ジャッキ装置５で上下の両仮受け張出部材４間に突っ張り力を作用させることで、柱１の上端部・上の仮受け張出部材４Ａ・ジャッキ装置５・下の仮受け張出部材４Ｂ・柱の下端部に連なる第１荷重分担経路Ｋ１が構築され（図４（ロ）参照）、ジャッキ装置５による突っ張り力に相当した仮受け分担荷重を、前記第１荷重分担経路で受け持つことが可能となる。その後、上の仮受け張出部材４Ａとその上の梁６Ａとの間、及び、下の仮受け張出部材４Ｂとその下の梁６Ｂとの間に、荷重伝達自在な状態に荷重伝達部材７をそれぞれ介在させることで、上の梁６Ａ・上の荷重伝達部材７Ａ・上の仮受け張出部材４Ａ・ジャッキ装置５・下の仮受け張出部材４Ｂ・下の荷重伝達部材７Ｂ・下の梁６Ｂに連なる第２荷重分担経路Ｋ２が構築される（図５（ハ）参照）。従って、柱１の切断に伴っては、前記第１荷重分担経路Ｋ１と第２荷重分担経路Ｋ２との両方の経路で、柱に作用する荷重を分担して仮受けすることが可能となる。   According to the load temporary receiving method described above, by applying a tension force between the upper and lower temporary receiving protruding members 4 with the jack device 5 in advance, the temporary receiving extending member 4A on the upper end of the column 1 A first load sharing path K1 connected to the jack device 5, the lower temporary support overhanging member 4B, and the lower end of the column is constructed (see FIG. 4B). Can be handled by the first load sharing path. Thereafter, the load transmitting member is in a state in which the load can be transmitted between the upper temporary support projecting member 4A and the upper beam 6A and between the lower temporary support projecting member 4B and the lower beam 6B. 7 is interposed, the upper beam 6A, the upper load transmission member 7A, the upper temporary support overhanging member 4A, the jack device 5, the lower temporary reception overhanging member 4B, the lower load transmission member 7B, the lower A second load sharing path K2 connected to the beam 6B is constructed (see FIG. 5C). Therefore, along with the cutting of the column 1, it is possible to share and temporarily receive the load acting on the column in both the first load sharing path K1 and the second load sharing path K2.

尚、本実施形態においては、前記柱１は、鉄筋コンクリートで構成されており、免震化に伴う応力アップに対処するために、断面を増加させることで補強が図られている（対象は、切断予定箇所Ｓ以外の範囲）。   In this embodiment, the pillar 1 is made of reinforced concrete, and is reinforced by increasing the cross section in order to cope with the stress increase associated with the seismic isolation (the object is a cutting). Range other than the planned location S).

荷重仮受け装置３について説明する。
上述のとおり、前記柱１の切断予定箇所Ｓの上側と下側とに、横に張り出す状態にそれぞれ取付自在な上下一対の仮受け張出部材４Ａ・４Ｂが設けられ、上下の仮受け張出部材４Ａ・４Ｂにわたって取付自在なジャッキ装置５が設けられ、上の仮受け張出部材４Ａとその上の梁６Ａとの間、及び、下の仮受け張出部材４Ｂとその下の梁６Ｂとの間に、荷重伝達自在な状態に介在可能な荷重伝達部材７が設けられて構成してある。
た荷重仮受け装置。 The load temporary receiving device 3 will be described.
As described above, a pair of upper and lower temporary support extending members 4A and 4B that can be mounted in a horizontally extending state are provided on the upper side and the lower side of the planned cutting site S of the pillar 1, respectively. A jack device 5 that can be mounted over the projecting members 4A and 4B is provided, and between the upper temporary support projecting member 4A and the upper beam 6A, and between the lower temporary support projecting member 4B and the lower beam 6B. Between the two, a load transmission member 7 that can be interposed in a load-transmittable state is provided.
Load receiving device.

前記仮受け張出部材４は、図３に示すように、鉄筋コンクリート製の複数のプレキャスト部材で構成され、それらを、前記柱１の外周に前記柱１の周方向に沿って環状に配置し、隣接する仮受け張出部材４どうしを、相互に貫通させたＰＣ鋼棒８で引き寄せることで各仮受け張出部材４を近接させて、前記柱１に対して挟持状態に取り付けることができる。
組み付けられた仮受け張出部材群Ｇは、外形が略正方形で、中央部分に、前記柱１が位置する略八角形の貫通孔を備えた形状を呈する。
そして、柱１の周方向に隣接する仮受け張出部材４どうしには、複数のＰＣ鋼棒８が貫通状態に設けられ、仮受け張出部材４の各端縁部にＰＣ鋼棒８の両端部が各別に定着してある。
また、仮受け張出部材群Ｇにおける四つの角部分には、上下の仮受け張出部材群Ｇにわたる状態に前記ジャッキ装置５が設置される。 As shown in FIG. 3, the provisional overhanging member 4 is composed of a plurality of precast members made of reinforced concrete, and arranges them annularly along the circumferential direction of the column 1 on the outer periphery of the column 1, By pulling adjacent temporary support overhanging members 4 with the PC steel rods 8 penetrating each other, the temporary support overhanging members 4 can be brought close to each other and attached to the column 1 in a sandwiched state.
The assembled provisional overhanging member group G has a substantially square outer shape, and has a shape having a substantially octagonal through-hole in which the column 1 is located at the center.
A plurality of PC steel bars 8 are provided in a penetrating manner between the temporary receiving overhang members 4 adjacent to each other in the circumferential direction of the column 1, and the PC steel bar 8 is attached to each end edge of the temporary receiving overhanging member 4. Both ends are fixed separately.
Further, the jack device 5 is installed at the four corners of the temporary receiving overhang member group G so as to cover the upper and lower temporary receiving overhang member groups G.

前記荷重伝達部材７は、本実施形態においては、スペースジャッキを用いてあり、梁６と仮受け張出部材４との間に位置させた状態で、双方に密接するまで伸長操作することで荷重伝達できる状態に設置することができる。   In the present embodiment, the load transmitting member 7 uses a space jack, and the load transmitting member 7 is extended between the beam 6 and the temporary support projecting member 4 until it is in close contact with the load 6. It can be installed in a state where it can be transmitted.

〔別実施形態〕
以下に他の実施の形態を説明する。 [Another embodiment]
Other embodiments will be described below.

〈１〉 荷重仮受け方法は、先の実施形態で説明したように、荷重伝達部材７を、上の荷重仮受け張出部材４Ａとその上の梁６Ａとの間、及び、下の荷重仮受け張出部材４Ｂとその下の梁６Ｂとの間それぞれに設置することに限るものではなく、例えば、図６（イ）、又は、図６（ロ）に示すように、何れか一方にのみ設置することでもよい。
〈２〉 また、先の実施形態で説明したように、上下の仮受け張出部材４にジャッキ装置５で突っ張り力を作用させてからた荷重伝達部材７を設置する方法に加えて、荷重伝達部材７を設置した後、更に、ジャッキ装置５を伸長操作するものであってもよい。
〈３〉 また、以上の各方法に替えて、図７に示すように、該当部分に当該荷重仮受け装置３を設置した後、ジャッキ装置５によって突っ張り力を作用させるようにしてもよい。
そして、この荷重仮受け方法においても、荷重伝達部材７は、上下何れか一方にのみ設置することでもよい。
〈４〉 当該荷重仮受け方法の対象となる建築構造は、先の実施形態で説明した鉄筋コンクリート造に限るものではなく、公知の他の建築構造であってもよい。
〈５〉 また、仮受け張出部材４や荷重伝達部材７の材質や形状等は、先の実施形態で説明したものに限るものではなく、変更することが可能である。 <1> As described in the previous embodiment, the load temporary receiving method is configured such that the load transmitting member 7 is placed between the upper temporary load receiving overhanging member 4A and the upper beam 6A and the lower temporary load member. For example, as shown in FIG. 6 (a) or FIG. 6 (b), it is not limited to being installed between the extension member 4B and the beam 6B below it. It may be installed.
<2> Further, as described in the previous embodiment, in addition to the method of installing the load transmitting member 7 after the tension force is applied to the upper and lower temporary support projecting members 4 by the jack device 5, the load transmission After the member 7 is installed, the jack device 5 may be further extended.
<3> Further, instead of the above methods, as shown in FIG. 7, after the load provisional receiving device 3 is installed in the corresponding portion, the jacking device 5 may apply a tensile force.
In this temporary load receiving method, the load transmitting member 7 may be installed only on either the upper or lower side.
<4> The building structure that is the target of the temporary load receiving method is not limited to the reinforced concrete structure described in the previous embodiment, and may be another known building structure.
<5> The material, shape, and the like of the provisional overhanging member 4 and the load transmitting member 7 are not limited to those described in the previous embodiment, and can be changed.

尚、上述のように、図面との対照を便利にするために符号を記したが、該記入により本発明は添付図面の構成に限定されるものではない。また、本発明の要旨を逸脱しない範囲において、種々なる態様で実施し得ることは勿論である。   In addition, as mentioned above, although the code | symbol was written in order to make contrast with drawing convenient, this invention is not limited to the structure of an accompanying drawing by this entry. In addition, it goes without saying that the present invention can be carried out in various modes without departing from the gist of the present invention.

荷重仮受け状態で免震装置を設置した状況を示す柱部分の側面図Side view of the column part showing the situation where the seismic isolation device is installed in the temporary load receiving state 仮受け張出部材の設置状況を示す平面図Plan view showing the installation status of the temporary support overhang member 仮受け張出部材の設置状況を示す分解平面図Exploded plan view showing the installation status of the temporary support overhang member 荷重仮受け方法を示す柱部分の側面図Side view of the column showing the load receiving method 荷重仮受け方法を示す柱部分の側面図Side view of the column showing the load receiving method 別実施形態の荷重仮受け方法を示す柱部分の側面図Side view of column portion showing load provision receiving method of another embodiment 別実施形態の荷重仮受け方法を示す柱部分の側面図Side view of column portion showing load provision receiving method of another embodiment 従来の荷重仮受け方法を示す柱部分の側面図Side view of the column showing the conventional load provision method 従来の荷重仮受け方法を示す柱部分の側面図Side view of the column showing the conventional load provision method

符号の説明Explanation of symbols

１ 柱
２ 免震装置
４ 仮受け張出部材
４Ａ 上の仮受け張出部材
４Ｂ 下の仮受け張出部材
５ ジャッキ装置
６Ａ 上の梁
６Ｂ 下の梁
７ 荷重伝達部材
Ｓ 切断予定箇所 DESCRIPTION OF SYMBOLS 1 Pillar 2 Seismic isolation device 4 Temporary receiving extension member 4A Temporary receiving extension member 4B Lower temporary receiving extension member 5 Jack device 6A Upper beam 6B Lower beam 7 Load transmission member S

Claims (4)

既設の柱の中間部を切断して免震装置を設置するにあたり、前記柱の切断予定箇所に作用する荷重を仮受けする荷重仮受け方法であって、
前記柱の切断予定箇所の上側と下側とに、横に張り出す状態に仮受け張出部材をそれぞれ設置し、上下の仮受け張出部材にわたってジャッキ装置を取り付け、前記ジャッキ装置で両仮受け張出部材間に突っ張り力を作用させた後、上の仮受け張出部材とその上の梁との間、及び、下の仮受け張出部材とその下の梁との間に、荷重伝達自在な状態に荷重伝達部材をそれぞれ介在させ、その後に前記ジャッキ装置を更に伸長操作する荷重仮受け方法。 In installing a seismic isolation device by cutting an intermediate part of an existing column, a load provisional method for provisionally receiving a load acting on the planned cutting position of the column,
Temporary receiving overhanging members are installed on the upper side and the lower side of the post-scheduled portion of the pillar so as to project laterally, and a jack device is attached over the upper and lower temporary receiving overhanging members. After applying a tensile force between the overhang members, load transmission is performed between the upper temporary support overhang member and the upper beam, and between the lower temporary support overhang member and the lower beam. freely state respectively by interposing a load transmission member, the further extension operation to that load temporary supporting method then the jack device. 既設の柱の中間部を切断して免震装置を設置するにあたり、前記柱の切断予定箇所に作用する荷重を仮受けする荷重仮受け方法であって、
前記柱の切断予定箇所の上側と下側とに、横に張り出す状態に仮受け張出部材をそれぞれ設置し、上下の仮受け張出部材にわたってジャッキ装置を取り付け、前記ジャッキ装置で両仮受け張出部材間に突っ張り力を作用させた後、上の仮受け張出部材とその上の梁との間、又は、下の仮受け張出部材とその下の梁との間に、荷重伝達自在な状態に荷重伝達部材を介在させ、その後に前記ジャッキ装置を更に伸長操作する荷重仮受け方法。 In installing a seismic isolation device by cutting an intermediate part of an existing column, a load provisional method for provisionally receiving a load acting on the planned cutting position of the column,
Temporary receiving overhanging members are installed on the upper side and the lower side of the post-scheduled portion of the pillar so as to project laterally, and a jack device is attached over the upper and lower temporary receiving overhanging members. After applying a tensile force between the overhang members, load transfer between the upper temporary support overhang member and the upper beam or between the lower temporary support overhang member and the lower beam freely state is interposed load transmission member, further extension operation to that load temporary supporting method then the jack device. 既設の柱の中間部を切断して免震装置を設置するにあたり、前記柱の切断予定箇所に作用する荷重を仮受けする荷重仮受け方法であって、
前記柱の切断予定箇所の上側と下側とに、横に張り出す状態に仮受け張出部材をそれぞれ設置し、上下の仮受け張出部材にわたってジャッキ装置を取り付け、上の仮受け張出部材とその上の梁との間、及び、下の仮受け張出部材とその下の梁との間に、荷重伝達自在な状態に荷重伝達部材をそれぞれ介在させた後、前記ジャッキ装置で両仮受け張出部材間に突っ張り力を作用させる荷重仮受け方法。 In installing a seismic isolation device by cutting an intermediate part of an existing column, a load provisional method for provisionally receiving a load acting on the planned cutting position of the column,
Temporary receiving overhanging members are installed on the upper side and the lower side of the post-scheduled portion of the column in a state of extending laterally, and a jack device is attached over the upper and lower temporary receiving overhanging members. After the load transmitting member is interposed between the lower temporary support projecting member and the lower beam so that the load can be transmitted, both jacks are used. A temporary load receiving method in which a tension force is applied between the receiving and extending members. 既設の柱の中間部を切断して免震装置を設置するにあたり、前記柱の切断予定箇所に作用する荷重を仮受けする荷重仮受け方法であって、
前記柱の切断予定箇所の上側と下側とに、横に張り出す状態に仮受け張出部材をそれぞれ設置し、上下の仮受け張出部材にわたってジャッキ装置を取り付け、上の仮受け張出部材とその上の梁との間、又は、下の仮受け張出部材とその下の梁との間に、荷重伝達自在な状態に荷重伝達部材を介在させた後、前記ジャッキ装置で両仮受け張出部材間に突っ張り力を作用させる荷重仮受け方法。 In installing a seismic isolation device by cutting an intermediate part of an existing column, a load provisional method for provisionally receiving a load acting on the planned cutting position of the column,
Temporary receiving overhanging members are installed on the upper side and the lower side of the post-scheduled portion of the column in a state of extending laterally, and a jack device is attached over the upper and lower temporary receiving overhanging members. A load transmission member interposed between the lower temporary support projecting member and the lower beam and the lower beam so that the load can be transmitted. A temporary load receiving method in which a tension force is applied between the overhang members.
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