JP7165548B2 - Seismic isolation foundation structure and its construction method - Google Patents

Seismic isolation foundation structure and its construction method Download PDF

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JP7165548B2
JP7165548B2 JP2018181080A JP2018181080A JP7165548B2 JP 7165548 B2 JP7165548 B2 JP 7165548B2 JP 2018181080 A JP2018181080 A JP 2018181080A JP 2018181080 A JP2018181080 A JP 2018181080A JP 7165548 B2 JP7165548 B2 JP 7165548B2
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seismic isolation
foundation
isolation foundation
reinforcing bars
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達 辰濃
直哉 田部井
知明 剱持
克次 村上
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Taisei Corp
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Description

本発明は、免震装置およびこの免震装置の上下に設けられた免震基礎を含んで構成される免震基礎構造、ならびに、その免震基礎の構築方法に関する。 The present invention relates to a base isolation structure including a base isolation device and base isolation foundations provided above and below the base isolation device, and a method for constructing the base isolation base.

従来より、免震装置を挟んで上下に免震基礎を構築する免震構造が提案されている。
特許文献１は、基礎スラブ１１と、この基礎スラブ１１上に設置されたプレキャストコンクリート盤１０と、このプレキャストコンクリート盤１０上に設置された免震装置１と、を備える免震基礎構造Ｂが示されている。基礎スラブ１１には、定着プレート付き鉄筋１２が埋設されており、この定着プレート付き鉄筋１２の上部は、プレキャストコンクリート盤１０の貫通孔１０ｃに挿通されているが、プレキャストコンクリート盤１０内の鉄筋に接合されていない。 Conventionally, a seismic isolation structure has been proposed in which seismic isolation foundations are constructed above and below a seismic isolation device.
Patent Document 1 shows a seismic isolation foundation structure B comprising a foundation slab 11, a precast concrete bed 10 installed on the foundation slab 11, and a seismic isolation device 1 installed on the precast concrete bed 10. It is In the foundation slab 11, a reinforcing bar 12 with a fixing plate is embedded, and the upper part of the reinforcing bar 12 with a fixing plate is inserted through the through hole 10c of the precast concrete board 10, but the reinforcing bar in the precast concrete board 10 Not spliced.

特許文献２には、下部基礎１と、この下部基礎１の上に設置された免震装置３と、この免震装置３の上に設置された平板状のＰＣａ盤１０と、このＰＣａ盤上に設けられた建物本体の基礎としてのＲＣ造の上部基礎２と、を備える免震基礎が示されている。ＰＣａ盤１０にはアンカー部材１３が埋設されており、このアンカー部材１３の上端部は、上部基礎２に定着しているが、上部基礎２の鉄筋には接合されていない。
特許文献３には、免震装置２と、この免震装置の下に固定される下層側の柱梁接合部３と、免震装置２の上に固定される上層側の柱梁接合部４と、を備える免震装置の取付構造が示されている。上層側の柱梁接合部４の下部は、ＰＣａ部材４１で構成されている。ＰＣａ部材４１の底面には、ベースプレート４５に固定されたアンカー４７が埋設されている。このアンカー４７の上端部は、柱梁接合部４に定着しているが、柱梁接合部４内の鉄筋には接合されていない。 In Patent Document 2, a lower foundation 1, a seismic isolation device 3 installed on this lower foundation 1, a flat PCa board 10 installed on this seismic isolation device 3, and on this PCa board A seismic isolation foundation provided with a RC structure upper foundation 2 as a foundation of the building body provided in the building is shown. Anchor members 13 are embedded in the PCa board 10 , and the upper ends of the anchor members 13 are fixed to the upper foundation 2 but are not joined to the reinforcing bars of the upper foundation 2 .
In Patent Document 3, a seismic isolation device 2, a beam-to-column joint 3 on the lower layer side fixed below the seismic isolation device, and a column-to-beam joint 4 on the upper layer side fixed above the seismic isolation device 2 and a mounting structure for a seismic isolation device. The lower part of the column-to-beam joint 4 on the upper layer side is composed of a PCa member 41 . An anchor 47 fixed to a base plate 45 is embedded in the bottom surface of the PCa member 41 . The upper end of the anchor 47 is fixed to the beam-to-column joint 4, but is not joined to the reinforcing bar in the beam-to-column joint 4. As shown in FIG.

特開２０１１－３２７５９号公報JP 2011-32759 A 特開２０１２－６７５２４号公報JP 2012-67524 A 特許第６３５９３４９号公報Japanese Patent No. 6359349

本発明は、免震装置を免震基礎上に高精度かつ短工期で設置でき、かつ、免震装置と免震基礎とを強固に一体化できる、免震基礎構造およびその構築方法を提供することを課題とする。 The present invention provides a seismic isolation foundation structure and a method of constructing the same, in which a seismic isolation device can be installed on a seismic isolation foundation with high accuracy and in a short construction period, and the seismic isolation device and the seismic isolation foundation can be firmly integrated. The challenge is to

本発明者らは、免震装置とこの免震装置の上下のプレキャストコンクリート造の免震基礎とを含む免震基礎構造として、各免震基礎から鉛直鉄筋を突出させることなく、各免震基礎内に基礎鉄筋に接続した鉄筋継手部を埋設しておき、その鉄筋継手部に躯体の鉛直鉄筋を挿入して接合することで、高精度に製作されたプレキャストコンクリート造の免震基礎を容易に所定の位置に設置でき、さらに、下部免震基礎と下部躯体とを確実に接合したり、上部免震基礎部と上部躯体とを確実に接合したりできる点に着眼して、本発明に至った。
第１の発明の免震基礎構造（例えば、後述の免震基礎構造１）は、下部躯体（例えば、後述の下部躯体１０）の上に設けられた下部免震基礎（例えば、後述の下部免震基礎２０）と、当該下部免震基礎の上に設置された免震装置（例えば、後述の免震装置３０）と、当該免震装置の上に設けられた上部免震基礎（例えば、後述の上部免震基礎４０）と、当該上部免震基礎の上に設けられた上部躯体（例えば、後述の上部躯体５０）と、を備える免震基礎構造であって、前記下部免震基礎および前記上部免震基礎のうち少なくとも一方を対象免震基礎（例えば、後述の下部免震基礎２０、上部免震基礎４０）とし、当該対象免震基礎に接する躯体を対象躯体（例えば、後述の下部躯体１０、上部躯体５０）とすると、前記対象免震基礎は、基礎鉄筋（例えば、後述の基礎鉄筋２５、４５）および当該基礎鉄筋に接合された鉄筋継手部（例えば、後述の鉄筋継手部２６、４６）が埋設され、前記対象躯体の前記対象免震基礎側の面には、鉛直鉄筋（例えば、後述の鉛直鉄筋１５、５５）が突出して設けられており、当該鉛直鉄筋は、当該対象免震基礎の鉄筋継手部に挿入されて接合されることを特徴とする。 The present inventors have proposed a seismic isolation foundation structure including a seismic isolation device and precast concrete seismic isolation foundations above and below the seismic isolation device without protruding vertical reinforcing bars from each seismic isolation foundation. Reinforcement joints connected to foundation rebars are buried inside, and the vertical rebars of the frame are inserted into the rebar joints and joined, making it easy to create a base isolation foundation made of precast concrete with high precision. Focusing on the point that it can be installed in a predetermined position, and that the lower seismic isolation foundation and the lower skeleton can be reliably joined, and the upper seismic isolation foundation and the upper skeleton can be reliably joined, the present invention was achieved. rice field.
A seismic isolation foundation structure (for example, a seismic isolation foundation structure 1 to be described later) of the first invention is a lower seismic isolation foundation (for example, a lower isolation structure to be described later) provided on a lower frame (for example, a lower frame 10 to be described later). Seismic foundation 20), a seismic isolation device (for example, a seismic isolation device 30 to be described later) installed on the lower seismic isolation foundation, and an upper seismic isolation foundation (for example, a seismic isolation device to be described later) provided on the seismic isolation device An upper base isolation foundation 40) and an upper skeleton (for example, an upper skeleton 50 described later) provided on the upper base isolation foundation, wherein the lower base isolation foundation and the Let at least one of the upper seismic isolation foundations be the target seismic isolation foundation (for example, the lower seismic isolation foundation 20 and the upper seismic isolation foundation 40 to be described later), and the frame that is in contact with the target seismic isolation foundation is the target frame (for example, the lower frame to be described later). 10, upper frame 50), the target seismic isolation foundation includes foundation reinforcing bars (for example, foundation reinforcing bars 25 and 45 to be described later) and reinforcing bar joints (for example, reinforcing bar joints 26 to be described later, 46) is buried, and vertical reinforcing bars (for example, vertical reinforcing bars 15 and 55 described later) are protruding from the surface of the target frame on the side of the target seismic isolation foundation. It is characterized by being inserted and joined to the reinforcing bar joint of the seismic foundation.

この発明によれば、下部免震基礎および上部免震基礎のうち少なくとも一方を対象免震基礎とし、対象免震基礎に接する躯体を対象躯体とする。対象免震基礎に、基礎鉄筋に接合された鉄筋継手部を埋設し、この鉄筋継手部に、対象躯体の鉛直鉄筋を接合した。よって、鉄筋継手部を介して、対象免震基礎の基礎鉄筋と対象躯体の鉛直鉄筋とが接合されるため、対象免震基礎と対象躯体とを強固に一体化できる。 According to this invention, at least one of the lower seismic isolation foundation and the upper seismic isolation foundation is the target seismic isolation foundation, and the frame in contact with the target seismic isolation foundation is the target frame. The reinforcing bar joints joined to the foundation reinforcing bars were embedded in the target seismic isolation foundation, and the vertical reinforcing bars of the target frame were joined to these reinforcing bar joints. Therefore, since the foundation reinforcing bars of the target seismic isolation foundation and the vertical reinforcing bars of the target frame are joined via the reinforcing bar joints, the target seismic isolation foundation and the target frame can be firmly integrated.

第２の発明の免震基礎構造は、前記対象免震基礎は、プレキャストコンクリート造であることを特徴とする。 A seismic isolation foundation structure of the second invention is characterized in that the target seismic isolation foundation is a precast concrete structure.

この発明によれば、対象免震基礎をプレキャストコンクリート造としたので、この対象免震基礎を予めＰＣ工場にて製作しておき、この製作した対象免震基礎を現場に搬入することで、短工期で免震基礎構造を構築できる。
また、対象免震基礎をプレキャストコンクリート造とすることで、予めＰＣ工場にて対象免震基礎を高精度で製作できるから、免震基礎構造を高精度で構築できる。
また、プレキャストコンクリート造の対象免震基礎に鉄筋継手部を埋設したので、対象免震基礎の鉄筋継手部に対象躯体の鉛直鉄筋を挿入することで、対象免震基礎と対象躯体とを比較的容易に接合できる。 According to this invention, since the target seismic isolation foundation is made of precast concrete, this target seismic isolation foundation is manufactured in advance at a PC factory, and by carrying this manufactured target seismic isolation foundation to the site, A seismic isolation foundation structure can be constructed within the construction period.
In addition, by making the target base isolation foundation a precast concrete structure, the target base isolation foundation can be manufactured with high accuracy in advance at a PC factory, so the base isolation foundation structure can be constructed with high accuracy.
In addition, since the reinforcing bar joints were buried in the target seismic isolation foundation of precast concrete construction, the target seismic isolation foundation and the target frame were compared by inserting the vertical reinforcing bars of the target frame into the reinforcing bar joints of the target seismic isolation foundation. Easy to join.

第３の発明の免震基礎構造の構築方法は、下部躯体の上に設けられた下部免震基礎と、当該下部免震基礎の上に設置された免震装置と、当該免震装置の上に設けられた上部免震基礎と、当該上部免震基礎の上に設けられた上部躯体と、を備える免震基礎構造の構築方法であって、上方に突出する鉛直鉄筋を有する下部躯体を構築する工程（例えば、後述のステップＳ１）と、予め、基礎主筋に接合された鉄筋継手部を埋設して下部免震基礎を製作しておき、当該下部免震基礎を前記下部躯体上に載置して、前記下部躯体の鉛直鉄筋を当該下部免震基礎の鉄筋継手部に挿入して接合する工程（例えば、後述のステップＳ２）と、前記下部免震基礎の上に前記免震装置を設置する工程（例えば、後述のステップＳ３）と、予め、基礎主筋に接合された鉄筋継手部を埋設して上部免震基礎を製作しておき、当該上部免震基礎を前記免震装置の上に設置する工程（例えば、後述のステップＳ４）と、前記上部免震基礎の鉄筋継手部に鉛直鉄筋を挿入して接合し、当該鉛直鉄筋を含んで前記上部躯体を構築する工程（例えば、後述のステップＳ５）と、を備えることを特徴とする。 A method for constructing a seismic isolation foundation structure of the third invention comprises: a lower seismic isolation foundation provided on a lower skeleton; a seismic isolation device installed on the lower seismic isolation foundation; A method for constructing a seismic isolation foundation structure comprising an upper seismic isolation foundation provided in the upper seismic isolation foundation and an upper skeleton provided on the upper seismic isolation foundation, wherein a lower skeleton having upwardly protruding vertical reinforcing bars is constructed. (for example, step S1 described later), a lower seismic isolation foundation is manufactured in advance by burying the reinforcing bar joints joined to the foundation main reinforcement, and the lower seismic isolation foundation is placed on the lower skeleton. Then, a step of inserting and joining the vertical reinforcing bars of the lower frame into the reinforcing bar joints of the lower base isolation foundation (for example, step S2 described later); and installing the base isolation device on the lower base isolation foundation. (for example, step S3 described later), and an upper seismic isolation foundation is manufactured in advance by burying the reinforcing bar joints joined to the foundation main reinforcement, and the upper seismic isolation foundation is placed on the seismic isolation device. A step of installing (for example, step S4 described later), and a step of inserting and joining vertical reinforcing bars into the reinforcing bar joints of the upper seismic isolation foundation and constructing the upper skeleton including the vertical reinforcing bars (for example, and step S5).

この発明によれば、上述の請求項１と同様の効果がある。 According to this invention, there is an effect similar to that of claim 1 described above.

本発明によれば、免震装置を免震基礎上に高精度かつ短工期で設置でき、かつ、免震装置と免震基礎とを強固に一体化できる、免震基礎構造およびその構築方法を提供できる。 According to the present invention, a seismic isolation foundation structure and a method for constructing the same are provided, in which a seismic isolation device can be installed on a seismic isolation foundation with high accuracy in a short construction period, and the seismic isolation device and the seismic isolation foundation can be firmly integrated. can provide.

本発明の一実施形態に係る免震基礎構造の側面図である。1 is a side view of a seismic isolation foundation structure according to an embodiment of the present invention; FIG. 図１のＡ－Ａ断面図である。FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1; 図１に示す免震基礎構造の配筋構造を示す図である。It is a figure which shows the bar arrangement structure of the seismic isolation foundation structure shown in FIG. 図１の破線Ｂで囲んだ部分の拡大図である。FIG. 2 is an enlarged view of a portion surrounded by a dashed line B in FIG. 1; 免震基礎構造の構築手順のフローチャートである。It is a flow chart of the construction procedure of the seismic isolation foundation structure. 免震基礎構造の構築手順の説明図（その１、下部躯体上に下部免震基礎を設置する状況）である。It is an explanatory diagram of the construction procedure of the seismic isolation foundation structure (No. 1, the situation of installing the lower seismic isolation foundation on the lower skeleton). 前記免震基礎構造の構築手順の説明図（その２、免震装置上に上部免震基礎を設置する状況）である。It is explanatory drawing of the construction|assembly procedure of the said seismic isolation foundation structure (2, the situation which installs an upper seismic isolation foundation on a seismic isolation apparatus).

本発明は、免震装置とこの免震装置の上下のプレキャストコンクリート造の免震基礎とを含む免震基礎構造、および、その免震基礎構造の構築方法である。
本実施形態では、下部免震基礎や上部免震基礎に、基礎鉄筋に接合された鉄筋継手部を埋設しておき、その鉄筋継手部に下部躯体や上部躯体の鉛直鉄筋を挿入して接合した。本実施形態によれば、各免震基礎の鉄筋継手部に各躯体の鉛直鉄筋を挿入して接合することで、各免震基礎と各躯体とが一体化されるため、各躯体に配筋される鉄筋と各免震基礎に配筋される基礎鉄筋とが干渉することはなく、比較的容易に強固に接合できる。また、プレキャストコンクリート造の免震基礎に突出した鉄筋を設けないので、複数の免震基礎を運搬用トラックの荷台に積載可能であり、ＰＣ工場から建設現場まで効率良く運搬できる。
以下、本発明の一実施形態について、図面を参照しながら説明する。
図１は、本発明の一実施形態に係る免震基礎構造１の側面図である。図２は、図１のＡ－Ａ断面図である。図３は、免震基礎構造１の配筋構造を示す図である。図４は、図１の破線Ｂで囲んだ部分の拡大図である。
免震基礎構造１は、下部躯体１０の上に設けられた下部免震基礎２０と、下部免震基礎２０の上に設けられた免震装置３０と、免震装置３０の上に設けられた上部免震基礎４０と、上部免震基礎４０の上に設けられた上部躯体５０と、を備える。 The present invention provides a seismic isolation base structure including a seismic isolation device and precast concrete seismic isolation foundations above and below the seismic isolation device, and a construction method for the seismic isolation base structure.
In this embodiment, the reinforcing bar joints joined to the foundation reinforcing bars are embedded in the lower seismic isolation foundation and the upper seismic isolation foundation, and the vertical reinforcing bars of the lower frame and the upper frame are inserted into the reinforcing bar joints and joined. . According to this embodiment, by inserting and joining the vertical reinforcing bars of each frame into the reinforcing bar joints of each seismic isolation foundation, each base isolation foundation and each frame are integrated. There is no interference between the reinforcing bars that are installed and the foundation reinforcing bars that are arranged on each seismic isolation foundation, and they can be joined relatively easily and firmly. In addition, since the precast concrete seismic isolation foundation is not provided with protruding reinforcing bars, a plurality of seismic isolation foundations can be loaded on the carrier of a transport truck, and can be efficiently transported from the PC factory to the construction site.
An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a side view of a seismic isolation foundation structure 1 according to one embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line AA of FIG. FIG. 3 is a diagram showing the bar arrangement structure of the seismic isolation foundation structure 1. As shown in FIG. FIG. 4 is an enlarged view of a portion surrounded by broken line B in FIG.
The seismic isolation foundation structure 1 includes a lower seismic isolation foundation 20 provided on a lower skeleton 10, a seismic isolation device 30 provided on the lower seismic isolation foundation 20, and a seismic isolation device 30 provided on the base isolation device 30. An upper seismic isolation foundation 40 and an upper skeleton 50 provided on the upper seismic isolation foundation 40 are provided.

下部躯体１０は、鉄筋コンクリート造であり、図１に示すように、鉄骨柱１１の上端部とこの鉄骨柱１１の上端部に接合された４本の鉄骨梁１２との柱梁接合部に構築されている。また、下部躯体１０の上端部には、床スラブ１３が構築されている。
下部躯体１０には、鉄筋１４が配筋されて埋設されている。この鉄筋１４の一部は、下部躯体１０の上面から上方に突出している鉛直鉄筋１５である（図３および図４参照）。 The lower frame 10 is made of reinforced concrete, and as shown in FIG. ing. A floor slab 13 is constructed at the upper end of the lower frame 10 .
Reinforcing bars 14 are arranged and embedded in the lower frame 10 . A part of this reinforcing bar 14 is a vertical reinforcing bar 15 protruding upward from the upper surface of the lower skeleton 10 (see FIGS. 3 and 4).

下部免震基礎２０は、平面視で矩形状のプレキャストコンクリート造であり、下部免震基礎２０と下部躯体１０との間には、グラウト層１６が形成されている。
図４に示すように、下部免震基礎２０の上面の中央部には、下部ベースプレート２１が打ち込まれている。この下部ベースプレート２１には、円環状にかつ所定間隔おきに、雌ねじ部２２が設けられており、この雌ねじ部２２の下端には、下部免震基礎２０に定着されるアンカーボルト２３が螺合されている。また、ベースプレート２１には、下部免震基礎２０に定着されるアンカー部材２４が設けられている。
また、下部免震基礎２０の下側の外周部には、基礎鉄筋２５およびこの基礎鉄筋２５に接合された鉄筋継手部２６が埋設されている。この鉄筋継手部２６の下端面は、下部免震基礎２０の下面に露出している。下部免震基礎２０の外周部に埋設された鉄筋継手部２６は、下部免震基礎２０内にかご状に配筋された基礎鉄筋２５の全ての下端部に接合されている。
下部躯体１０の鉛直鉄筋１５は、下部免震基礎２０の鉄筋継手部２６に接合されている。鉛直鉄筋１５を鉄筋継手部２６に挿入し、この状態で、注入ホース２７を通して鉄筋継手部２６内に無収縮グラウト材を充填することで、鉛直鉄筋１５が鉄筋継手部２６に接合される。 The lower seismic isolation foundation 20 is a rectangular precast concrete structure in plan view, and a grout layer 16 is formed between the lower seismic isolation foundation 20 and the lower frame 10 .
As shown in FIG. 4 , a lower base plate 21 is driven into the central portion of the upper surface of the lower seismic isolation foundation 20 . The lower base plate 21 is provided with female threaded portions 22 annularly at predetermined intervals, and anchor bolts 23 fixed to the lower seismic isolation foundation 20 are screwed to the lower ends of the female threaded portions 22 . ing. The base plate 21 is also provided with anchor members 24 fixed to the lower seismic isolation foundation 20 .
Further, foundation reinforcing bars 25 and reinforcing bar joints 26 joined to the basic reinforcing bars 25 are embedded in the lower outer peripheral portion of the lower seismic isolation foundation 20 . A lower end surface of the reinforcing bar joint portion 26 is exposed to the lower surface of the lower base isolation foundation 20 . The reinforcing bar joints 26 embedded in the outer peripheral portion of the lower base isolation foundation 20 are joined to all the lower end portions of the foundation reinforcing bars 25 arranged in the lower base isolation foundation 20 in a basket shape.
The vertical reinforcing bars 15 of the lower skeleton 10 are joined to the reinforcing bar joints 26 of the lower seismic isolation foundation 20 . The vertical reinforcing bar 15 is joined to the reinforcing bar joint section 26 by inserting the vertical reinforcing bar 15 into the reinforcing bar joint section 26 and filling the reinforcing bar joint section 26 with a non-shrinkable grout material through the injection hose 27 in this state.

免震装置３０は、上部免震基礎４０を下部免震基礎２０に対して水平移動可能に支持するものである。
免震装置３０は、積層ゴム３１と、積層ゴム３１の下に位置する下フランジ３２と、積層ゴム３１の上に位置する上フランジ３３と、を備える。
積層ゴム３１は、鋼板とゴムとが交互に積層されたものである。
上下のフランジ３２、３３には、周縁部に沿って所定間隔おきに、ボルトを挿通するためのボルト挿通孔３４が設けられている。
下フランジ３２は、下部ベースプレート２１に当接している。ボルト３５を下フランジ３２のボルト挿通孔３４に挿通し、雌ねじ部２２に螺合することで、下フランジ３２が下部免震基礎２０の下部ベースプレート２１に固定される。 The seismic isolation device 30 supports the upper seismic isolation foundation 40 horizontally movably with respect to the lower seismic isolation foundation 20 .
The seismic isolation device 30 includes a laminated rubber 31 , a lower flange 32 positioned below the laminated rubber 31 , and an upper flange 33 positioned above the laminated rubber 31 .
The laminated rubber 31 is formed by alternately laminating steel plates and rubber.
The upper and lower flanges 32 and 33 are provided with bolt insertion holes 34 for inserting bolts at predetermined intervals along the periphery.
The lower flange 32 abuts the lower base plate 21 . The lower flange 32 is fixed to the lower base plate 21 of the lower seismic isolation foundation 20 by inserting the bolt 35 through the bolt insertion hole 34 of the lower flange 32 and screwing it into the female screw portion 22 .

上部免震基礎４０は、平面視で矩形状のプレキャストコンクリート造であり、下部免震基礎２０と同様の構造である。
上部免震基礎４０の下面の中央部には、上部ベースプレート４１が打ち込まれている。この上部ベースプレート４１には、円環状にかつ所定間隔おきに、雌ねじ部４２が設けられており、この雌ねじ部４２の下端には、上部免震基礎４０に定着されるアンカーボルトが螺合されている。また、ベースプレート４１には、上部免震基礎４０に定着されるアンカー部材４４が設けられている。
また、図３に示すように、上部免震基礎４０の上側の外周部には、基礎鉄筋４５およびこの基礎鉄筋４５に接合された鉄筋継手部４６が埋設されている。この鉄筋継手部４６の上端面は、上部免震基礎４０の上面に露出している。上部免震基礎４０の外周部に埋設された鉄筋継手部４６は、下部免震基礎２０の鉄筋継手部２６と同様に、上部免震基礎４０内にかご状に配筋された基礎鉄筋４５の全ての上端部に接合されている。
免震装置３０の上フランジ３３は、上部ベースプレート４１に当接している。ボルト３５を上フランジ３３のボルト挿通孔３４に挿通し、雌ねじ部４２に螺合することで、上部免震基礎４０の上部ベースプレート４１が上フランジ３３に固定される。 The upper seismic isolation foundation 40 is a rectangular precast concrete structure in plan view, and has the same structure as the lower seismic isolation foundation 20 .
An upper base plate 41 is driven into the center of the lower surface of the upper seismic isolation foundation 40 . The upper base plate 41 is provided with female threaded portions 42 in an annular shape at predetermined intervals, and anchor bolts fixed to the upper seismic isolation base 40 are screwed to the lower ends of the female threaded portions 42 . there is The base plate 41 is also provided with anchor members 44 fixed to the upper seismic isolation foundation 40 .
Further, as shown in FIG. 3 , foundation reinforcing bars 45 and reinforcing bar joints 46 joined to the foundation reinforcing bars 45 are embedded in the upper outer peripheral portion of the upper seismic isolation foundation 40 . The upper end surface of the reinforcing bar joint portion 46 is exposed on the upper surface of the upper seismic isolation foundation 40 . The reinforcing bar joint portion 46 embedded in the outer peripheral portion of the upper base isolation foundation 40 is, like the reinforcing bar joint portion 26 of the lower base isolation foundation 20, the foundation reinforcing bars 45 arranged in a basket shape within the upper base isolation foundation 40. All upper ends are joined.
The upper flange 33 of the seismic isolation device 30 is in contact with the upper base plate 41 . The upper base plate 41 of the upper seismic isolation foundation 40 is fixed to the upper flange 33 by inserting the bolt 35 through the bolt insertion hole 34 of the upper flange 33 and screwing it into the female screw portion 42 .

図１に戻って、上部躯体５０は、鉄筋コンクリート造であり、鉄骨柱５１の下端部とこの鉄骨柱５１の下端部に接合された４本の鉄骨梁５２との柱梁接合部に構築されている。また、上部躯体５０の上端部には、床スラブ５３が構築されている。
図３に示すように、上部躯体５０には、鉄筋５４が配筋されて埋設されている。上部免震基礎４０の鉄筋継手部４６には、鉛直方向に延びる鉛直鉄筋５５が挿入されて接合され、この鉛直鉄筋５５は、上部躯体５０の鉄筋５４の一部となっている。
上部免震基礎４０と上部躯体５０との間には、グラウト層５６が形成されている。 Returning to FIG. 1, the upper frame 50 is made of reinforced concrete and is constructed at the column-to-beam joints between the lower ends of the steel columns 51 and the four steel beams 52 joined to the lower ends of the steel columns 51. there is A floor slab 53 is constructed at the upper end of the upper skeleton 50 .
As shown in FIG. 3 , reinforcing bars 54 are arranged and embedded in the upper skeleton 50 . A vertical reinforcing bar 55 extending in the vertical direction is inserted and joined to the reinforcing bar joint portion 46 of the upper base isolation foundation 40 , and the vertical reinforcing bar 55 is a part of the reinforcing bar 54 of the upper skeleton 50 .
A grout layer 56 is formed between the upper seismic isolation foundation 40 and the upper skeleton 50 .

（免震基礎構造の構築方法）
以下、免震基礎構造１を構築する手順について、図５のフローチャートを参照しながら説明する。
ステップＳ１では、図６に示すように、鉄骨柱１１と鉄骨梁１２との柱梁接合部に、下部躯体１０を構築する。この下部躯体１０の上面には、鉛直鉄筋１５が上方に突出している。 (Construction method of seismic isolation foundation structure)
The procedure for constructing the seismic isolation foundation structure 1 will be described below with reference to the flowchart of FIG.
In step S1, as shown in FIG. 6, the lower skeleton 10 is constructed at the column-to-beam joint between the steel frame column 11 and the steel frame beam 12. As shown in FIG. A vertical reinforcing bar 15 protrudes upward from the upper surface of the lower frame 10 .

ステップＳ２では、下部躯体１０上に下部免震基礎２０を設置する。
具体的には、図６に示すように、下部免震基礎２０を予めＰＣ工場にて製作しておき、現場に搬入する。次に、この下部免震基礎２０を図示しない揚重機で吊り上げて、下部躯体１０上に載置する。このとき、下部躯体１０の鉛直鉄筋１５を下部免震基礎２０の鉄筋継手部２６に挿入しつつ、下部免震基礎２０の高さおよび水平度を調整する。次に、注入ホース２７を通して鉄筋継手部２６内に無収縮グラウト材を充填して、鉛直鉄筋１５を鉄筋継手部２６に接合する（図４参照）。また、下部免震基礎２０と下部躯体１０との間にグラウト材を充填して、グラウト層１６を形成する。 In step S<b>2 , the lower seismic isolation foundation 20 is installed on the lower skeleton 10 .
Specifically, as shown in FIG. 6, the lower seismic isolation base 20 is manufactured in advance at a PC factory and carried to the site. Next, the lower seismic isolation foundation 20 is lifted by a lifting machine (not shown) and placed on the lower skeleton 10 . At this time, the height and levelness of the lower base isolation foundation 20 are adjusted while inserting the vertical reinforcing bars 15 of the lower skeleton 10 into the reinforcing bar joints 26 of the lower base isolation foundation 20 . Next, a non-shrinkable grout material is filled into the reinforcing bar joint portion 26 through the injection hose 27 to join the vertical reinforcing bar 15 to the reinforcing bar joint portion 26 (see FIG. 4). In addition, a grout layer 16 is formed by filling a gap between the lower seismic isolation foundation 20 and the lower skeleton 10 with a grout material.

ステップＳ３では、図７に示すように下部免震基礎２０上に免震装置３０を設置する。
具体的には、免震装置３０を図示しない揚重機で吊り上げて、下部免震基礎２０上に載置する。次に、ボルト３５を取り付けて、免震装置３０の下フランジ３２を下部免震基礎２０の下部ベースプレート２１に固定する。 In step S3, the seismic isolation device 30 is installed on the lower seismic isolation base 20 as shown in FIG.
Specifically, the seismic isolation device 30 is lifted by a lifting machine (not shown) and placed on the lower seismic isolation foundation 20 . Next, bolts 35 are attached to fix the lower flange 32 of the seismic isolation device 30 to the lower base plate 21 of the lower seismic isolation foundation 20 .

ステップＳ４では、免震装置３０上に上部免震基礎４０を設置する。
具体的には、図７に示すように、上部免震基礎４０を予めＰＣ工場にて製作しておき、現場に搬入する。次に、この上部免震基礎４０を図示しない揚重機で吊り上げて、免震装置３０上に載置する。次に、ボルト３５を取り付けて、上部免震基礎４０の上部ベースプレート４１を免震装置３０の上フランジ３３に固定する。なお、プレキャストコンクリート造の下部免震基礎２０および上部免震基礎４０については、ＰＣ工場に限らず、現場敷地内（サイトＰＣ）にて製作してもよい。 In step S<b>4 , the upper base isolation foundation 40 is installed on the base isolation device 30 .
Specifically, as shown in FIG. 7, the upper seismic isolation foundation 40 is manufactured in advance at a PC factory and carried to the site. Next, the upper seismic isolation foundation 40 is lifted by a lifting machine (not shown) and placed on the seismic isolation device 30 . Next, the bolts 35 are attached to fix the upper base plate 41 of the upper seismic isolation base 40 to the upper flange 33 of the seismic isolation device 30 . Note that the precast concrete lower seismic isolation foundation 20 and upper seismic isolation foundation 40 may be manufactured not only at the PC factory but also within the site site (site PC).

ステップＳ５では、上部免震基礎４０上に上部躯体５０を構築する。
具体的には、上部免震基礎４０上に鉄骨柱５１の建方を行い、この鉄骨柱５１の下端部に４本の鉄骨梁５２を接合する。次に、上部免震基礎４０の鉄筋継手部４６に鉛直鉄筋５５が挿入して接合し、この鉛直鉄筋５５を含んで上部躯体５０の鉄筋５４を配筋する。その後、上部躯体５０の型枠を建て込んで、コンクリートを打設する。また、上部免震基礎４０と上部躯体５０との間にグラウト材を充填して、グラウト層５６を形成する。
上記のように、下部躯体１０と下部免震基礎２０との間および上部免震基礎４０と上部躯体５０との間のそれぞれにグラウト層１６、５６を設けたので、現場でコンクリートを打設して構築した躯体１０、５０とプレキャストコンクリート造の免震基礎２０、４０とを位置決め調整を行いながら接合できる。 In step S<b>5 , the upper skeleton 50 is constructed on the upper seismic isolation foundation 40 .
Specifically, a steel column 51 is erected on the upper seismic isolation foundation 40, and four steel beams 52 are joined to the lower ends of the steel columns 51. As shown in FIG. Next, the vertical reinforcing bars 55 are inserted and joined to the reinforcing bar joints 46 of the upper seismic isolation foundation 40 , and the reinforcing bars 54 of the upper skeleton 50 are arranged including the vertical reinforcing bars 55 . After that, the formwork for the upper skeleton 50 is erected and concrete is cast. Also, a grout layer 56 is formed by filling a gap between the upper seismic isolation foundation 40 and the upper skeleton 50 with a grout material.
As described above, since the grout layers 16 and 56 are provided between the lower skeleton 10 and the lower seismic isolation foundation 20 and between the upper seismic isolation foundation 40 and the upper skeleton 50, respectively, concrete is placed on site. The frames 10 and 50 constructed by the method and the seismic isolation bases 20 and 40 made of precast concrete can be joined while performing positioning adjustment.

本実施形態によれば、以下のような効果がある。
（１）下部免震基礎２０に、基礎鉄筋２５に接合された鉄筋継手部２６を埋設し、この鉄筋継手部２６に、下部躯体１０から突出した鉛直鉄筋１５を接合した。また、上部免震基礎４０に、基礎鉄筋４５に接合された鉄筋継手部４６を埋設し、この鉄筋継手部４６に、上部躯体５０に埋設される鉛直鉄筋５５を接合した。よって、鉄筋継手部４６を介して、免震基礎２０、４０の基礎鉄筋２５、４５と躯体１０、５０の鉛直鉄筋１５、５５とが接合されるため、免震基礎２０、４０と躯体１０、５０とを強固に一体化できる。 According to this embodiment, there are the following effects.
(1) Reinforcement joints 26 joined to foundation rebars 25 were embedded in the lower seismic isolation foundation 20 , and vertical rebars 15 projecting from the lower skeleton 10 were joined to the rebar joints 26 . Also, reinforcing bar joints 46 joined to foundation reinforcing bars 45 were embedded in the upper seismic isolation foundation 40 , and vertical reinforcing bars 55 embedded in the upper skeleton 50 were joined to the reinforcing bar joints 46 . Therefore, since the foundation reinforcing bars 25, 45 of the seismic isolation foundations 20, 40 and the vertical reinforcing bars 15, 55 of the frames 10, 50 are joined via the reinforcing bar joints 46, the seismic isolation foundations 20, 40 and the frames 10, 50 can be firmly integrated.

（２）下部免震基礎２０および上部免震基礎４０をプレキャストコンクリート造としたので、これら免震基礎２０、４０を予めＰＣ工場にて製作しておき、この製作した免震基礎２０、４０を現場に搬入することで、短工期で免震基礎構造１を構築できる。
また、免震基礎２０、４０をプレキャストコンクリート造とすることで、予めＰＣ工場にて免震基礎２０、４０を高精度で製作できるから、免震基礎構造１を高精度で構築できる。
また、プレキャストコンクリート造の免震基礎２０、４０に鉄筋継手部２６、４６を埋設したので、免震基礎２０の鉄筋継手部２６，４６に、躯体１０、５０の鉛直鉄筋１５、５５を挿入することで、免震基礎２０、４０と躯体１０、５０とを比較的容易に接合できる。 (2) Since the lower seismic isolation foundation 20 and the upper seismic isolation foundation 40 are made of precast concrete, these seismic isolation foundations 20 and 40 are manufactured in advance at a PC factory, and the manufactured seismic isolation foundations 20 and 40 are installed. By carrying it to the site, the seismic isolation foundation structure 1 can be constructed in a short construction period.
Further, by making the base isolation foundations 20 and 40 of precast concrete construction, the base isolation foundations 20 and 40 can be manufactured with high accuracy in advance at a PC factory, so the base isolation structure 1 can be constructed with high accuracy.
In addition, since the reinforcement joints 26 and 46 are embedded in the seismic isolation foundations 20 and 40 made of precast concrete, the vertical reinforcement bars 15 and 55 of the frames 10 and 50 are inserted into the reinforcement joints 26 and 46 of the seismic isolation foundation 20. Thus, the seismic isolation foundations 20, 40 and the frames 10, 50 can be joined relatively easily.

（３）鉄筋継手部２６、４６は、免震基礎２０、４０の外周部に配置されて、躯体１０、５０の鉛直鉄筋１５、５５に接合される。よって、免震基礎２０、４０の中央部には、鉛直方向に延びる鉄筋が配筋されておらず、鉄骨柱１１、５１を躯体１０、５０の免震装置３０付近まで延ばすことができるため、下部免震基礎２０と下部躯体１０との接合部分および上部免震基礎４０と上部躯体５０の接合部分について、接合強度や剛性を高めることができる。 (3) The reinforcing bar joints 26 , 46 are arranged on the outer periphery of the seismic isolation bases 20 , 40 and joined to the vertical reinforcing bars 15 , 55 of the frames 10 , 50 . Therefore, since reinforcing bars extending in the vertical direction are not arranged in the central portions of the seismic isolation foundations 20 and 40, the steel columns 11 and 51 can be extended to the vicinity of the seismic isolation device 30 of the frames 10 and 50, The joint strength and rigidity of the joint portion between the lower seismic isolation foundation 20 and the lower skeleton 10 and the joint portion between the upper seismic isolation foundation 40 and the upper skeleton 50 can be increased.

なお、本発明は前記実施形態に限定されるものではなく、本発明の目的を達成できる範囲での変形、改良等は本発明に含まれるものである。
なお、本実施形態では、下部免震基礎２０および上部免震基礎４０の両方をプレキャストコンクリート造としたが、これに限らず、下部免震基礎２０および上部免震基礎４０の一方のみをプレキャストコンクリート造とし、他方を現場打設コンクリート造としてもよい。
また、本実施形態では、免震基礎２０、４０の外周部に埋設した鉄筋継手部２６、４６を、免震基礎２０、４０の基礎鉄筋２５、４５の全ての先端部に接合したが、これに限らず、免震装置３０が負担する水平力を鉄筋継手部の水平抵抗力が上回る場合には、各免震基礎２０、４０の四隅にのみ鉄筋継手部を設けて、各免震基礎２０、４０の辺縁の中央付近には特に鉄筋継手部を設けず、基礎鉄筋２５、４５を免震基礎２０、４０内に定着させてもよい。
また、本実施形態では、下部躯体１０、下部免震基礎２０、免震装置３０、上部免震基礎４０、上部躯体５０の順に構築あるいは設置したが、これに限らず、予めＰＣ工場や現場敷地内において、上下のプレキャストコンクリート造の各免震基礎２０、４０と免震装置３０とを接合して免震基礎ユニットを製作しておき、現場にて、下部躯体１０上に当該免震基礎ユニットを設置し、その免震基礎ユニット上に上部躯体５０を接合して免震基礎構造を構築してもよい。 It should be noted that the present invention is not limited to the above-described embodiments, and includes modifications, improvements, etc. within the scope of achieving the object of the present invention.
In this embodiment, both the lower base isolation foundation 20 and the upper base isolation foundation 40 are made of precast concrete. It is also possible to use a concrete structure and the other to be a cast-in-place concrete structure.
Further, in the present embodiment, the reinforcing bar joints 26, 46 embedded in the outer peripheral portions of the seismic isolation foundations 20, 40 are joined to all the tips of the foundation reinforcing bars 25, 45 of the seismic isolation foundations 20, 40. However, if the horizontal resistance of the reinforcing bar joints exceeds the horizontal force borne by the seismic isolation device 30, the reinforcing bar joints are provided only at the four corners of each base isolation foundation 20, 40, and each base isolation base 20 , 40 may be fixed in the seismic isolation foundations 20, 40 without providing a reinforcement joint part in particular.
Further, in the present embodiment, the lower frame 10, the lower seismic isolation foundation 20, the seismic isolation device 30, the upper seismic isolation foundation 40, and the upper frame 50 were constructed or installed in this order, but this is not the only option. Inside, the upper and lower precast concrete seismic isolation foundations 20 and 40 and the seismic isolation device 30 are joined to manufacture a seismic isolation foundation unit, and the seismic isolation foundation unit is installed on the lower frame 10 at the site. may be installed, and the upper skeleton 50 may be joined on the seismic isolation base unit to construct a seismic isolation base structure.

１…免震基礎構造
１０…下部躯体 １１…鉄骨柱 １２…鉄骨梁 １３…床スラブ １４…鉄筋
１５…鉛直鉄筋 １６…グラウト層
２０…下部免震基礎 ２１…下部ベースプレート ２２…雌ねじ部
２３…アンカーボルト ２４…アンカー部材 ２５…基礎鉄筋 ２６…鉄筋継手部
２７…注入ホース
３０…免震装置 ３１…積層ゴム ３２…下フランジ ３３…上フランジ
３４…ボルト挿通孔 ３５…ボルト
４０…上部免震基礎 ４１…上部ベースプレート ４２…雌ねじ部
４４…アンカー部材 ４５…基礎鉄筋 ４６…鉄筋継手部
５０…上部躯体 ５１…鉄骨柱 ５２…鉄骨梁 ５３…床スラブ ５４…鉄筋
５５…鉛直鉄筋 ５６…グラウト層 DESCRIPTION OF SYMBOLS 1... Base isolation foundation structure 10... Lower frame 11... Steel column 12... Steel beam 13... Floor slab 14... Reinforcing bar 15... Vertical reinforcing bar 16... Grout layer 20... Lower base isolation foundation 21... Lower base plate 22... Female screw part 23... Anchor BOLT 24 Anchor member 25 Foundation reinforcing bar 26 Rebar joint 27 Injection hose 30 Seismic isolation device 31 Laminated rubber 32 Lower flange 33 Upper flange 34 Bolt insertion hole 35 Bolt 40 Upper base isolation foundation 41 ... Upper base plate 42 ... Female screw part 44 ... Anchor member 45 ... Foundation reinforcing bar 46 ... Reinforcement joint part 50 ... Upper skeleton 51 ... Steel column 52 ... Steel beam 53 ... Floor slab 54 ... Reinforcing bar 55 ... Vertical reinforcing bar 56 ... Grout layer

Claims (2)

下部躯体の上に設けられた下部免震基礎と、当該下部免震基礎の上に設置された免震装置と、当該免震装置の上に設けられた上部免震基礎と、当該上部免震基礎の上に設けられた上部躯体と、を備える免震基礎構造であって、
前記下部免震基礎および前記上部免震基礎のうち少なくとも一方を対象免震基礎とし、当該対象免震基礎に接する躯体を対象躯体とすると、
前記対象免震基礎は、プレキャストコンクリート造であり、かご状に配筋された基礎鉄筋および当該基礎鉄筋の全ての先端部に接合された鉄筋継手部が埋設され、
前記対象躯体の前記対象免震基礎側の面には、鉛直鉄筋が突出して設けられており、
当該対象免震基礎の鉄筋継手部は、平面視で、前記免震装置を前記対象免震基礎に固定するためのアンカーボルトから離れた位置に設けられ、前記鉛直鉄筋が挿入された状態で、グラウト材が充填されて接合されていることを特徴とする免震基礎構造。 A lower seismic isolation foundation installed on the lower frame, a seismic isolation device installed on the lower seismic isolation foundation, an upper seismic isolation foundation installed on the seismic isolation device, and the upper seismic isolation A seismic isolation foundation structure comprising an upper frame provided on the foundation,
When at least one of the lower base isolation foundation and the upper base isolation foundation is set as the target base isolation foundation, and the frame in contact with the target base isolation base is set as the target frame,
The target seismic isolation foundation is made of precast concrete, and is embedded with foundation reinforcing bars arranged in a basket shape and reinforcing bar joints joined to the tips of all the foundation reinforcing bars,
A vertical reinforcing bar is protrudingly provided on the surface of the target frame on the target seismic isolation foundation side,
The reinforcing bar joint of the target seismic isolation foundation is provided at a position away from the anchor bolt for fixing the seismic isolation device to the target seismic isolation foundation in plan view, and in a state in which the vertical reinforcing bar is inserted, A seismic isolation foundation structure characterized by being filled and joined with grout material. 下部躯体の上に設けられた下部免震基礎と、当該下部免震基礎の上に設置された免震装置と、当該免震装置の上に設けられた上部免震基礎と、当該上部免震基礎の上に設けられた上部躯体と、を備える免震基礎構造の構築方法であって、
上方に突出する鉛直鉄筋を有する下部躯体を構築する工程と、
予め、かご状の基礎鉄筋および当該基礎鉄筋の全ての下端部に接合されてかつ平面視で前記免震装置を前記下部免震基礎に固定するためのアンカーボルトから離れた位置に設けられた鉄筋継手部を埋設してプレキャストコンクリート造の下部免震基礎を製作しておき、当該下部免震基礎を前記下部躯体上に載置して、前記下部躯体の鉛直鉄筋を当該下部免震基礎の鉄筋継手部に挿入し、当該下部免震基礎の鉄筋継手部にグラウト材を充填して接合する工程と、
前記下部免震基礎の上に前記免震装置を設置する工程と、
予め、かご状の基礎鉄筋および当該基礎鉄筋の全ての上端部に接合されてかつ平面視で前記免震装置を前記上部免震基礎に固定するためのアンカーボルトから離れた位置に設けられた鉄筋継手部を埋設してプレキャストコンクリート造の上部免震基礎を製作しておき、当該上部免震基礎を前記免震装置の上に設置する工程と、
前記上部免震基礎の鉄筋継手部に鉛直鉄筋を挿入し、当該鉛直鉄筋を含んで前記上部躯体を構築する工程と、を備えることを特徴とする免震基礎構造の構築方法。 A lower seismic isolation foundation installed on the lower frame, a seismic isolation device installed on the lower seismic isolation foundation, an upper seismic isolation foundation installed on the seismic isolation device, and the upper seismic isolation A method for constructing a seismic isolation foundation structure comprising an upper frame provided on a foundation,
constructing a lower skeleton having vertical rebars projecting upward;
Reinforcing bars that are preliminarily joined to the cage-shaped foundation reinforcing bars and the lower ends of all of the foundation reinforcing bars and that are provided at positions apart from the anchor bolts for fixing the base isolation device to the lower base isolation foundation in a plan view. A lower seismic isolation foundation made of precast concrete is manufactured by burying joints, the lower seismic isolation foundation is placed on the lower frame, and the vertical reinforcing bars of the lower frame are used as reinforcing bars of the lower seismic isolation foundation. a step of inserting the grout material into the joint portion and joining the rebar joint portion of the lower seismic isolation foundation by filling the grout material ;
installing the seismic isolation device on the lower seismic isolation foundation;
Reinforcing bars that are joined in advance to the basket-shaped foundation reinforcing bars and the upper ends of all of the foundation reinforcing bars and that are provided in a position apart from anchor bolts for fixing the seismic isolation device to the upper seismic isolation foundation in a plan view. A step of burying joints to fabricate an upper seismic isolation foundation made of precast concrete , and installing the upper seismic isolation foundation on top of the seismic isolation device;
A method for constructing a seismic isolation foundation structure, comprising: inserting vertical reinforcing bars into reinforcing bar joints of the upper base isolation foundation, and constructing the upper skeleton including the vertical reinforcing bars.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009197504A (en) 2008-02-22 2009-09-03 Takenaka Komuten Co Ltd Base isolating and refurbishing method for existing building and carriage-type installing apparatus used in it
JP2011047201A (en) 2009-08-27 2011-03-10 Taisei Corp Method of constructing base isolation structure
JP2012067524A (en) 2010-09-24 2012-04-05 Shimizu Corp Base isolation foundation and construction method therefor
JP2016000913A (en) 2014-06-11 2016-01-07 大成建設株式会社 Mounting structure and mounting method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009197504A (en) 2008-02-22 2009-09-03 Takenaka Komuten Co Ltd Base isolating and refurbishing method for existing building and carriage-type installing apparatus used in it
JP2011047201A (en) 2009-08-27 2011-03-10 Taisei Corp Method of constructing base isolation structure
JP2012067524A (en) 2010-09-24 2012-04-05 Shimizu Corp Base isolation foundation and construction method therefor
JP2016000913A (en) 2014-06-11 2016-01-07 大成建設株式会社 Mounting structure and mounting method

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