JP5252226B2 - Building seismic isolation method and seismic isolation building - Google Patents

Building seismic isolation method and seismic isolation building Download PDF

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JP5252226B2
JP5252226B2 JP2009189285A JP2009189285A JP5252226B2 JP 5252226 B2 JP5252226 B2 JP 5252226B2 JP 2009189285 A JP2009189285 A JP 2009189285A JP 2009189285 A JP2009189285 A JP 2009189285A JP 5252226 B2 JP5252226 B2 JP 5252226B2
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seismic isolation
retaining wall
column
building
clearance
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JP2011038375A (en
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義人 本多
康司 佐守
昌一 山中
英幸 田川
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Shimizu Corp
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本発明は、建物の免震化工法及びこれを用いて免震化した免震建物に関する。   The present invention relates to a seismic isolation method for a building and a seismic isolation building using the same.

従来、図8及び図9に示すように、地盤Gを掘削して基礎1とこの基礎1に連続して立設する擁壁2を構築し、これら基礎1と擁壁2で囲まれた地下空間Hに、地下階となる柱3、スラブ4を設けて構築した建物T(既存建物)がある(例えば、特許文献1参照)。また、この種の建物Tには、柱3(外周柱3a)とスラブ4と擁壁2を一体化し、外周柱3aとスラブ4と擁壁2で(すなわち地下階の建物T全体で)土圧荷重を受けるようにしたものがある。   Conventionally, as shown in FIG. 8 and FIG. 9, the ground G is excavated to construct a foundation 1 and a retaining wall 2 standing upright on the foundation 1, and the underground surrounded by the foundation 1 and the retaining wall 2. In space H, there is a building T (existing building) constructed by providing pillars 3 and slabs 4 serving as basements (see, for example, Patent Document 1). Also, in this type of building T, the column 3 (outer column 3a), the slab 4 and the retaining wall 2 are integrated, and the outer column 3a, the slab 4 and the retaining wall 2 (that is, the entire building T on the basement floor) is soiled. Some are designed to receive pressure loads.

特開2000−27201号公報Japanese Patent Laid-Open No. 2000-27201

そして、上記のように、外周柱3aとスラブ4と擁壁2で土圧荷重を受けている既存建物Tを地下階の柱頭あるいは柱脚で免震化する場合には、一般に、外周柱3a及びスラブ4と擁壁2とを切り離し、擁壁2を補強して土圧荷重を受けるようにしている。   As described above, in the case where the existing building T receiving the earth pressure load by the outer peripheral column 3a, the slab 4, and the retaining wall 2 is subjected to seismic isolation at the base of the basement or the column base, in general, the outer peripheral column 3a The slab 4 and the retaining wall 2 are separated from each other, and the retaining wall 2 is reinforced to receive an earth pressure load.

しかしながら、建物Tには、敷地境界あるいは道路境界に近接して(敷地境界あるいは道路境界ギリギリに)擁壁2を設けて構築されているものもあり、このような場合には、擁壁2を外側から補強することができず、また、建物T内側にコンクリートを増し打ちして擁壁2を補強すると、免震クリアランスを確保できなくなる場合がある。   However, some buildings T are constructed with a retaining wall 2 provided close to the site boundary or road boundary (at the site boundary or road boundary). If the reinforcement wall 2 cannot be reinforced from the outside and the retaining wall 2 is reinforced by adding concrete to the inside of the building T, seismic isolation clearance may not be secured.

一方、建物Tの一部と敷地境界あるいは道路境界との間に余裕がある場合には、曳き屋により建物Tを移設して免震クリアランスを確保し、建物T内側にコンクリートを増し打ちして擁壁2を補強することも考えられるが、曳き屋工事によって免震化のコストや工期が増大するという問題が生じる。   On the other hand, if there is a margin between part of the building T and the site boundary or road boundary, the building T is relocated by a thatched house to ensure seismic isolation clearance, and the concrete inside the building T Although it is possible to reinforce the retaining wall 2, there is a problem that the cost and construction period of the seismic isolation increase due to thatched-house work.

本発明は、上記事情に鑑み、曳き屋を要することなく、免震クリアランスを確保して擁壁を補強し、建物を免震化することが可能な建物の免震化工法及びこれを用いて免震化した免震建物を提供することを目的とする。   In view of the above circumstances, the present invention uses a seismic isolation method for a building that can secure a seismic isolation clearance, reinforce a retaining wall, and make a building seismic isolation, without requiring a thatched house, and The purpose is to provide seismic isolation buildings.

上記の目的を達するために、この発明は以下の手段を提供している。   In order to achieve the above object, the present invention provides the following means.

本発明の建物の免震化工法は、地盤を掘削して基礎と該基礎に連続して立設する擁壁とを構築し、前記基礎と擁壁で囲まれた地下空間に、地下階の柱、梁、スラブを設けてなる建物を免震化する方法であって、前記柱の頭部あるいは脚部に免震装置を介装設置する免震装置設置工程と、前記擁壁を補強する擁壁補強工程とを備え、前記擁壁補強工程では、柱位置周りを除く柱スパン間と柱位置周りとに分け、前記柱スパン間は、前記梁よりも下のレベルと梁位置レベルに分け、前記柱位置周りは、前記免震装置よりも下のレベルと免震装置設置レベルとに分けて擁壁補強を行うようにし、前記柱スパン間の前記梁よりも下のレベルは、コンクリート増し打ちにより補強を行い、前記柱スパン間の前記梁位置レベルは、免震クリアランスを確保できる場合にコンクリート増し打ちにより補強を行い、免震クリアランスを確保できない場合に前記免震クリアランスを確保できるように前記梁位置を変えた上でコンクリート増し打ちにより補強を行い、前記柱位置周りの前記免震装置よりも下のレベルは、前記免震クリアランスを確保することなくコンクリート増し打ちにより補強を行い、前記柱位置周りの前記免震装置設置位置は、コンクリート増し打ちの補強スペースが確保できない場合に、前記擁壁の横筋あるいは前記擁壁をはつり込んで前記免震クリアランスを確保しつつ増設した横筋により柱スパン間に土圧による応力を伝達させることを特徴とする。   The seismic isolation method for a building according to the present invention comprises excavating the ground to construct a foundation and a retaining wall that is continuously provided on the foundation, and in an underground space surrounded by the foundation and the retaining wall, A method of seismically isolating a building comprising columns, beams, and slabs, and a seismic isolation device installation step in which a seismic isolation device is installed on the head or leg of the column, and the retaining wall is reinforced A retaining wall reinforcing step, wherein the retaining wall reinforcing step is divided between the column spans excluding the column positions and the column positions, and the column spans are divided into a level below the beam and a beam position level. In addition, the wall around the column is divided into a level lower than the seismic isolation device and a seismic isolation device installation level to reinforce the retaining wall, and the level below the beam between the column spans is increased with concrete. Reinforced by striking, the beam position level between the column spans ensures seismic isolation clearance If it is possible to reinforce with concrete, and if seismic isolation clearance cannot be secured, the beam position is changed so that seismic isolation clearance can be secured, and then reinforced by concrete additional striking, If the level below the seismic isolation device is reinforced with concrete reinforcement without securing the seismic isolation clearance, and the location of the seismic isolation device around the column position cannot secure the space for reinforcing concrete reinforcement Further, it is characterized in that stress due to earth pressure is transmitted between the column spans by means of the horizontal bars of the retaining wall or the horizontal bars that are added while securing the seismic isolation clearance.

この発明においては、擁壁補強工程で柱スパン間を補強する際に、梁よりも下のレベルは、地下階の梁下空間が確保され、免震クリアランスが十分に確保できるため、擁壁の内側にコンクリートを増し打ちし、確実に擁壁で土圧荷重を受けられるように補強することが可能である。一方、土圧荷重に対して免震クリアランスの確保が最も厳しくなる梁位置のレベルにおいては、所要の免震クリアランスが確保できる場合には免震クリアランスを確保しつつ擁壁の内側にコンクリートを増し打ちして補強を行うことができる。また、所要の免震クリアランスが確保できない場合には、既存梁を撤去し、免震クリアランスを確保できる位置に梁を新設(あるいは移設)することで、所要の免震クリアランスを確保しつつ擁壁の内側にコンクリートを増し打ちし、補強を行うことができる。   In this invention, when reinforcing between the column spans in the retaining wall reinforcement step, the space below the beam is secured under the beam in the basement floor and sufficient seismic isolation clearance can be secured. It is possible to reinforce concrete so that it can receive earth pressure load at the retaining wall. On the other hand, at the level of the beam position where the seismic isolation clearance is most severe with respect to earth pressure load, if the required seismic isolation clearance can be secured, concrete is added inside the retaining wall while securing the seismic isolation clearance. Can be reinforced by striking. If the required seismic isolation clearance cannot be ensured, the existing beam is removed and a new wall is installed (or moved) to a position where the seismic isolation clearance can be secured. It can be reinforced by striking concrete inside.

また、擁壁補強工程で柱周りを補強する際に、免震装置よりも下のレベルは、免震クリアランスの確保が不要であるため、この部分の擁壁と柱の間の空間を利用して、擁壁の内側にコンクリートを増し打ちし、補強を行うことができる。一方、免震装置設置レベルにおいて、補強スペースがない場合には、コンクリートの増し打ちを行わず、擁壁の横筋で柱スパン間に土圧による応力を伝達させて柱位置周りの土圧荷重を受けるようにする。また、免震クリアランスを確保できない場合や擁壁の横筋で土圧による応力を伝達しきれない場合には、擁壁をはつり込んで、免震クリアランスを確保し、新たに横筋を増設して横補強を行うことで、土圧による応力を柱スパン間に伝達できるようにする。   Also, when reinforcing around the column in the retaining wall reinforcement process, it is not necessary to secure the seismic isolation clearance at the level below the seismic isolation device, so use the space between the retaining wall and the column in this part. Thus, concrete can be squeezed inside the retaining wall for reinforcement. On the other hand, if there is no reinforcement space at the seismic isolation equipment installation level, the concrete wall is not struck and the stress due to earth pressure is transmitted between the column spans by the horizontal bars of the retaining wall, and the earth pressure load around the column position is increased. Try to receive. In addition, if the seismic isolation clearance cannot be secured or the stress due to earth pressure cannot be transmitted through the horizontal wall of the retaining wall, the retaining wall is inserted to secure the seismic isolation clearance, and a new horizontal line is added to the lateral wall. Reinforcement enables stress due to earth pressure to be transmitted between column spans.

本発明の免震建物は、上記の建物の免震化工法を用いて免震化したことを特徴とする。   The base-isolated building of the present invention is characterized in that the base is isolated using the above-mentioned base isolation method.

この発明においては、上記の建物の免震化工法を用いることで、敷地境界あるいは道路境界に近接している場合であっても、擁壁で確実に土圧荷重を受けるように補強を行うことができる。   In this invention, by using the seismic isolation method for the building described above, even if the building is close to the site boundary or road boundary, the retaining wall is used to reinforce so as to receive the earth pressure load reliably. Can do.

本発明の建物の免震化工法及び免震建物によれば、曳き屋を行うことなく、また、建物外周すべてにおいて敷地の余裕がなく、曳き屋ができない場合であっても、確実に擁壁を内側から補強することができ、地下階における中間階免震改修を行うことが可能になる。また、擁壁と外周柱のクリアランスが小さい場合にも曳き屋を行わずに擁壁を補強しながら地下階柱頭(柱脚)免震改修を行うことが可能になる。   According to the seismic isolation method of the building and the seismic isolation building of the present invention, the retaining wall is surely retained even if there is no vacancy, and there is not enough room on the entire periphery of the building, so that a awning can not be made. Can be reinforced from the inside, making it possible to perform seismic isolation of the intermediate floor in the basement. In addition, even when the clearance between the retaining wall and the outer column is small, it is possible to perform base-base (column base) seismic isolation repair while reinforcing the retaining wall without using a stirrer.

これにより、曳き屋を伴う免震化と比較し、コストや工期を大幅に低減することが可能になる。なお、本発明の建物の免震化工法は新設の免震建物を構築する際に用いることも可能である。   This makes it possible to significantly reduce the cost and construction period compared to seismic isolation with thatched houses. The building seismic isolation method of the present invention can also be used when constructing a new seismic isolation building.

本発明の一実施形態に係る建物の免震化工法の擁壁補強工程で柱位置周りを除く柱スパン間の擁壁補強を行った状態を示す図である。It is a figure which shows the state which performed the retaining wall reinforcement between the column spans except the column position periphery at the retaining wall reinforcement process of the seismic isolation method of the building which concerns on one Embodiment of this invention. 図1(及び図5)のX1−X1線矢視図である。FIG. 6 is an X1-X1 arrow view of FIG. 1 (and FIG. 5). 図1(及び図5)のX2−X2線矢視図である。It is the X2-X2 arrow directional view of FIG. 1 (and FIG. 5). 本発明の一実施形態に係る建物の免震化工法の擁壁補強工程で柱位置周りを除く柱スパン間の擁壁補強を行う際に、梁位置レベルを変えて免震クリアランスを確保した状態を示す図である。A state in which a seismic isolation clearance is secured by changing the beam position level when performing retaining wall reinforcement between column spans except around the column position in the retaining wall reinforcement step of the seismic isolation method for a building according to an embodiment of the present invention FIG. 本発明の一実施形態に係る建物の免震化工法の擁壁補強工程で柱位置周りの擁壁補強を行った状態を示す図である。It is a figure which shows the state which performed the retaining wall reinforcement around the column position at the retaining wall reinforcement process of the seismic isolation method of the building which concerns on one Embodiment of this invention. 本発明の一実施形態に係る建物の免震化工法の擁壁補強工程で柱位置周りの擁壁補強を行う際に、擁壁をはつり込んで免震クリアランスを確保した状態を示す図である。It is a figure which shows the state which seized the retaining wall and secured the seismic isolation clearance when performing retaining wall reinforcement around a pillar position in the retaining wall reinforcement process of the seismic isolation method of the building concerning one embodiment of the present invention. . 図6のX1−X1線矢視図である。It is a X1-X1 line arrow directional view of FIG. 基礎と擁壁で囲まれた地下空間に、地下階となる柱、スラブを設けて構築した免震化前の建物を示す図である。It is a figure which shows the building before the seismic isolation constructed by providing the pillar and slab as the basement floor in the underground space surrounded by the foundation and the retaining wall. 図8のX1−X1線矢視図である。It is a X1-X1 line arrow directional view of FIG.

以下、図1から図7及び図8、図9を参照し、本発明の一実施形態に係る建物の免震化工法及びこれを用いて免震化した免震建物について説明する。本実施形態においては、地盤を掘削して基礎とこの基礎に連続して立設する擁壁を構築し、これら基礎と擁壁で囲まれた地下空間に、地下階となる柱、スラブを設けて構築した既存建物を免震化する免震化工法及び免震建物に関するものである。   Hereinafter, with reference to FIGS. 1 to 7, 8, and 9, a seismic isolation method for a building according to an embodiment of the present invention and a seismic isolation building using the seismic isolation building will be described. In this embodiment, the foundation is constructed by excavating the ground and a retaining wall that is continuously installed on the foundation, and a column and slab serving as an underground floor are provided in the underground space surrounded by the foundation and the retaining wall. This is related to the seismic isolation method for seismic isolation of existing buildings and seismic isolation buildings.

本実施形態の建物Tの免震化工法は、柱3の頭部(柱頭)あるいは脚部(柱脚)に免震装置5を介装設置する免震装置設置工程(図1参照)と、擁壁2を補強する擁壁補強工程とを備えている。   The seismic isolation method for the building T according to the present embodiment includes a seismic isolation device installation step (see FIG. 1) in which the seismic isolation device 5 is installed on the head (pillar) or the leg (column base) of the column 3; A retaining wall reinforcing step for reinforcing the retaining wall 2.

擁壁補強工程では、はじめに、擁壁2とスラブ4を切り離し、柱位置周りを除く柱スパン間S1と柱位置周りS2とに分けて擁壁補強を行う。また、柱位置周りを除く柱スパン間S1においては、梁6よりも下のレベルP1(図1及び図2)と梁位置レベルP2(図1及び図3)に分けて擁壁補強を行う。梁6よりも下のレベルP1においては、図1及び図2に示すように、地下階の梁下空間が確保され、免震クリアランスが十分に確保できるため、既存擁壁2の内側にコンクリートCを増し打ちし、擁壁2で土圧荷重を確実に受けられるように補強を行う。   In the retaining wall reinforcing step, first, the retaining wall 2 and the slab 4 are separated, and the retaining wall reinforcement is performed by separating the pillar span S1 excluding the periphery of the column position and the column position periphery S2. In addition, in the column span S1 except around the column position, the retaining wall reinforcement is performed in a level P1 (FIGS. 1 and 2) below the beam 6 and a beam position level P2 (FIGS. 1 and 3). At the level P1 below the beam 6, as shown in FIG. 1 and FIG. 2, the space below the beam in the basement is secured and the seismic isolation clearance can be sufficiently secured. The reinforcement wall 2 is reinforced so that the earth wall load can be reliably received by the retaining wall 2.

一方、柱位置周りを除く柱スパン間S1の梁位置レベルP2においては、土圧荷重に対して免震クリアランスの確保が最も厳しくなる。そして、所要の免震クリアランスを確保できる場合には、図1及び図3に示すように、免震クリアランスを確保しつつ既存擁壁2の内側にコンクリートCを増し打ちし、擁壁2で土圧荷重を受けられるように補強を行う。   On the other hand, in the beam position level P2 between the column spans S1 excluding the periphery of the column position, the seismic isolation clearance is most severely secured against the earth pressure load. If the required seismic isolation clearance can be secured, as shown in FIGS. 1 and 3, concrete C is added to the inside of the existing retaining wall 2 while securing the seismic isolation clearance, and the retaining wall 2 Reinforce so that it can receive pressure load.

また、梁位置レベルP2で免震クリアランスが確保できない場合には、図4に示すように、既存梁6を撤去し、免震クリアランスを確保できる位置に梁6を新設する(あるいは梁6を移設する)。そして、所要の免震クリアランスを確保しつつ既存擁壁2の内側にコンクリートCを増し打ちし、擁壁2で土圧荷重を受けられるように補強を行う。   If the seismic isolation clearance cannot be secured at the beam position level P2, as shown in FIG. 4, the existing beam 6 is removed and the beam 6 is newly installed at a position where the seismic isolation clearance can be secured (or the beam 6 is relocated). To do). Then, concrete C is added to the inside of the existing retaining wall 2 while ensuring the required seismic isolation clearance, and the retaining wall 2 is reinforced so as to receive an earth pressure load.

次に、柱位置周りS2においては、柱頭あるいは柱脚に設置した免震装置5よりも下のレベルP3(図2及び図5)と、免震装置設置レベルP4(図3及び図5)とに分けて擁壁補強を行う。免震装置5よりも下のレベルP3においては、図2及び図5に示すように、免震クリアランスの確保が不要であるため、この部分の既存擁壁2と柱3(3a)の間の空間を利用して、既存擁壁2の内側にコンクリートCを増し打ちし、擁壁2で土圧荷重を確実に受けられるように補強を行う。   Next, in the column position periphery S2, the level P3 (FIGS. 2 and 5) below the seismic isolation device 5 installed at the stigma or the column base and the seismic isolation device installation level P4 (FIGS. 3 and 5) Reinforcing the retaining wall separately. At the level P3 below the seismic isolation device 5, as shown in FIG. 2 and FIG. 5, it is not necessary to secure the seismic isolation clearance. Therefore, between the existing retaining wall 2 and the column 3 (3a) in this part. Using the space, the concrete C is added to the inside of the existing retaining wall 2 and reinforced so that the retaining wall 2 can reliably receive the earth pressure load.

免震装置設置レベルP4においては、図3及び図5に示すように、免震クリアランスが確保されているが補強スペースがない場合、コンクリートCの増し打ちを行わず、土圧による応力を既存擁壁2の横筋で柱スパン間S1に伝達させ、柱位置周りS2の土圧荷重を受けることを基本にする。   At the seismic isolation device installation level P4, as shown in FIG. 3 and FIG. 5, when the seismic isolation clearance is secured but there is no reinforcement space, the concrete C is not struck and the stress due to the earth pressure is retained. Basically, the horizontal streak of the wall 2 is transmitted to the column span S1 and receives the earth pressure load around the column position S2.

一方、免震装置設置レベルP4において、免震クリアランスが確保されていない場合、あるいは既存擁壁2の横筋では土圧による応力を柱スパン間S1に伝達しきれない場合には、図6及び図7に示すように、既存擁壁2をはつり込んで、免震クリアランスを確保し、新たに横筋7を増設して横補強を行い、土圧による応力を柱スパン間S1に伝達できるようにする。   On the other hand, when the seismic isolation clearance is not secured at the seismic isolation device installation level P4, or when the stress due to the earth pressure cannot be transmitted to the column span S1 by the transverse bars of the existing retaining wall 2, FIG. 6 and FIG. As shown in FIG. 7, the existing retaining wall 2 is inserted to secure the seismic isolation clearance, and the horizontal bar 7 is newly added to perform lateral reinforcement so that the stress due to earth pressure can be transmitted to the column span S1. .

したがって、本実施形態の建物Tの免震化工法においては、擁壁補強工程で柱スパン間S1を補強する際に、梁6よりも下のレベルP1は、地下階の梁下空間が確保され、免震クリアランスが十分に確保できるため、擁壁2の内側にコンクリートCを増し打ちし、確実に擁壁2で土圧荷重を受けられるように補強することが可能である。一方、土圧荷重に対して免震クリアランスの確保が最も厳しくなる梁位置レベルP2においては、所要の免震クリアランスが確保できる場合には免震クリアランスを確保しつつ擁壁2の内側にコンクリートCを増し打ちして補強を行うことができる。また、所要の免震クリアランスが確保できない場合には、既存梁6を撤去し、免震クリアランスを確保できる位置に梁6を新設(あるいは移設)することで、所要の免震クリアランスを確保しつつ擁壁2の内側にコンクリートCを増し打ちし、補強を行うことができる。   Therefore, in the seismic isolation method for the building T according to the present embodiment, when the column span S1 is reinforced in the retaining wall reinforcing process, the level P1 below the beam 6 secures the space below the beam on the basement floor. Since sufficient seismic isolation clearance can be secured, it is possible to reinforce concrete C inside the retaining wall 2 so that the retaining wall 2 can reliably receive earth pressure load. On the other hand, at the beam position level P2, where the seismic isolation clearance is most severely secured against earth pressure load, if the required seismic isolation clearance can be ensured, the concrete C is secured inside the retaining wall 2 while securing the seismic isolation clearance. It is possible to reinforce by striking. If the required seismic isolation clearance cannot be secured, the existing beam 6 is removed, and the beam 6 is newly installed (or moved) at a position where the seismic isolation clearance can be secured, while ensuring the required seismic isolation clearance. The concrete C can be struck inside the retaining wall 2 for reinforcement.

また、擁壁補強工程で柱周りを補強する際に、免震装置5よりも下のレベルP3は、免震クリアランスの確保が不要であるため、この部分の擁壁2と柱3の間の空間を利用して、擁壁2の内側にコンクリートCを増し打ちし、補強を行うことができる。一方、免震装置設置レベルP4において、補強スペースがない場合には、コンクリートCの増し打ちを行わず、擁壁2の横筋で柱スパン間S1に土圧による応力を伝達させて柱位置周りS2の土圧荷重を受けるようにする。また、免震クリアランスを確保できない場合や擁壁2の横筋で土圧による応力を伝達しきれない場合には、擁壁2をはつり込んで、免震クリアランスを確保し、新たに横筋7を増設して横補強を行うことで、土圧による応力を柱スパン間S1に伝達できるようにする。   In addition, when reinforcing the periphery of the column in the retaining wall reinforcement step, the level P3 below the seismic isolation device 5 does not require seismic isolation clearance, so the portion between the retaining wall 2 and the column 3 in this part is not necessary. The space can be used to reinforce concrete C inside the retaining wall 2 for reinforcement. On the other hand, in the seismic isolation device installation level P4, when there is no reinforcing space, the concrete C is not struck and the stress due to earth pressure is transmitted between the column spans S1 by the horizontal bars of the retaining wall 2 and around the column position S2. To receive the earth pressure load. If seismic isolation clearance cannot be secured or if stress due to earth pressure cannot be transmitted by the horizontal bars of retaining wall 2, seize retaining wall 2 to secure seismic isolation clearance and add new lateral bars 7. By performing lateral reinforcement, stress due to earth pressure can be transmitted to the column span S1.

そして、このような建物の免震化工法を用いることで、敷地境界あるいは道路境界に近接している場合であっても、擁壁2で確実に土圧荷重を受けるように補強を行うことができ、確実に建物Tを免震化することが可能になる(免震建物Tにすることができる)。   And by using such a seismic isolation method for buildings, it is possible to reinforce the retaining wall 2 so as to reliably receive earth pressure load even when it is close to the site boundary or road boundary. It is possible to make the building T seismically isolated (it can be made the seismic isolated building T).

よって、本実施形態の建物Tの免震化工法及び免震建物Tによれば、曳き屋を行うことなく、また、建物T外周すべてにおいて敷地の余裕がなく、曳き屋ができない場合であっても、確実に擁壁2を内側から補強することができ、地下階における中間階免震改修を行うことが可能になる。また、擁壁2と外周柱3aのクリアランスが小さい場合にも曳き屋を行わずに擁壁2を補強しながら地下階柱頭(柱脚)免震改修を行うことが可能になる。   Therefore, according to the seismic isolation method of the building T and the seismic isolation building T according to the present embodiment, there is no room, and there is no room on the entire outer periphery of the building T, and that is not possible. However, the retaining wall 2 can be reliably reinforced from the inside, and the intermediate floor seismic isolation repair in the basement can be performed. In addition, even when the clearance between the retaining wall 2 and the outer peripheral column 3a is small, it is possible to perform base-base (pillar) seismic isolation repair while reinforcing the retaining wall 2 without performing a stirrer.

これにより、曳き屋を伴う免震化と比較し、コストや工期を大幅に低減することが可能になる。なお、本発明の建物Tの免震化工法は新設の免震建物Tを構築する際に用いることも可能である。   This makes it possible to significantly reduce the cost and construction period compared to seismic isolation with thatched houses. Note that the seismic isolation method for the building T of the present invention can also be used when constructing a new seismic isolation building T.

以上、本発明に係る建物の免震化工法及びこれを用いた免震建物の一実施形態について説明したが、本発明は上記の実施形態に限定されるものではなく、その趣旨を逸脱しない範囲で適宜変更可能である。   As mentioned above, although one embodiment of the seismic isolation construction method of a building concerning the present invention and a seismic isolation building using this was described, the present invention is not limited to the above-mentioned embodiment, and the range which does not deviate from the meaning It can be changed as appropriate.

1 基礎
2 擁壁(既存擁壁)
3 柱
3a 外周柱
4 スラブ
5 免震装置
6 梁
7 横筋
C コンクリート
G 地盤
H 地下空間
P1 梁よりも下のレベル
P2 梁位置レベル
P3 免震装置よりも下のレベル
P4 免震装置設置レベル
S1 柱位置周りを除く柱スパン間
S2 柱位置周り
T 建物(免震建物)
1 foundation 2 retaining wall (existing retaining wall)
3 Column 3a Peripheral column 4 Slab 5 Seismic isolation device 6 Beam 7 Horizontal streak C Concrete G Ground H Underground space P1 Level P2 below the beam P3 Beam position level P3 Level P4 below the seismic isolation device S1 Column Between column spans excluding the position around S2 Around the column position T Building (Seismic Isolated Building)

Claims (2)

地盤を掘削して基礎と該基礎に連続して立設する擁壁とを構築し、前記基礎と擁壁で囲まれた地下空間に、地下階の柱、梁、スラブを設けてなる建物を免震化する方法であって、
前記柱の頭部あるいは脚部に免震装置を介装設置する免震装置設置工程と、前記擁壁を補強する擁壁補強工程とを備え、
前記擁壁補強工程では、柱位置周りを除く柱スパン間と柱位置周りとに分け、前記柱スパン間は、前記梁よりも下のレベルと梁位置レベルに分け、前記柱位置周りは、前記免震装置よりも下のレベルと免震装置設置レベルとに分けて擁壁補強を行うようにし、
前記柱スパン間の前記梁よりも下のレベルは、コンクリート増し打ちにより補強を行い、
前記柱スパン間の前記梁位置レベルは、免震クリアランスを確保できる場合にコンクリート増し打ちにより補強を行い、免震クリアランスを確保できない場合に前記免震クリアランスを確保できるように前記梁位置を変えた上でコンクリート増し打ちにより補強を行い、
前記柱位置周りの前記免震装置よりも下のレベルは、前記免震クリアランスを確保することなくコンクリート増し打ちにより補強を行い、
前記柱位置周りの前記免震装置設置位置は、コンクリート増し打ちの補強スペースが確保できない場合に、前記擁壁の横筋あるいは前記擁壁をはつり込んで前記免震クリアランスを確保しつつ増設した横筋により柱スパン間に土圧による応力を伝達させることを特徴とする建物の免震化工法。
Excavation of the ground to build a foundation and a retaining wall that stands continuously on the foundation, and a basement floor, a building that is provided with pillars, beams, and slabs in the underground space surrounded by the retaining wall A method of seismic isolation,
A seismic isolation device installation step of installing a seismic isolation device in the head or leg of the column; and a retaining wall reinforcement step of reinforcing the retaining wall;
In the retaining wall reinforcing step, it is divided into between the column spans and around the column positions except around the column positions, the column spans are divided into a level below the beam and a beam position level, Reinforcement of the retaining wall is divided into the level below the seismic isolation device and the seismic isolation device installation level.
The level below the beam between the column spans is reinforced with concrete reinforcement,
The beam position level between the column spans was reinforced by additional concrete when the seismic isolation clearance could be secured, and the beam position was changed so that the seismic isolation clearance could be secured when the seismic isolation clearance could not be secured. Reinforced by smashing concrete above,
The level below the seismic isolation device around the column position is reinforced by additional concrete without securing the seismic isolation clearance,
The seismic isolation device installation position around the column position is determined by the horizontal bars of the retaining wall or the lateral bars that are installed while securing the seismic isolation clearance by suspending the retaining wall when the space for reinforcing concrete reinforcement cannot be secured. A seismic isolation method for buildings, characterized by transmitting stress due to earth pressure between column spans.
請求項1記載の建物の免震化工法を用いて免震化したことを特徴とする免震建物。   A base-isolated building that has been isolated using the seismic isolation method for a building according to claim 1.
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