JP4638095B2 - Substructure of base-isolated building - Google Patents

Substructure of base-isolated building Download PDF

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Publication number
JP4638095B2
JP4638095B2 JP2001281864A JP2001281864A JP4638095B2 JP 4638095 B2 JP4638095 B2 JP 4638095B2 JP 2001281864 A JP2001281864 A JP 2001281864A JP 2001281864 A JP2001281864 A JP 2001281864A JP 4638095 B2 JP4638095 B2 JP 4638095B2
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Prior art keywords
retaining wall
seismic isolation
pit
building
cantilever slab
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JP2003090146A (en
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幸雄 佐藤
晃三 服部
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Okumura Corp
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Okumura Corp
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Description

【０００１】
【発明の属する技術分野】
本発明は基礎上に設置した免震装置に支持されている免震建築物における下部構造に関するものである。
【０００２】
【従来の技術】
地震や強風によって建築物が大きく揺れるのを抑制するために、基礎と建築物との間に免震装置を介装し、この免震装置によって地震時等において発生する振動を吸収させるようにした免震建築物が広く知られている。
【０００３】
このような免震建築物の１つの具体的な構造としては、図４に示すように、地中に所定深さのピット21を掘削すると共に該ピット21の下方の地盤に基礎22を造成してこの基礎22により上記ピット21の底面に施工したピット床スラブ23を支持させ、さらに、該ピット床スラブ23上の複数箇所に一定高さの下側支持部材26を一体に打設すると共に各下側支持部材26上に免震装置25を設置し、この免震装置25上に上側支持部材27を介して建築物30を支持させてなる免震建築物がある。
【０００４】
このように構成した免震構造物においては、地震発生時に振動によってピット21の擁壁24と免震装置25上の上側支持部材27とが衝突する虞れがあるので、これを避けるために、擁壁24と上側支持部材27との対向面間の間隙部ｂを、予想される最大水平変位量に余裕を持たせた距離に設定している。しかしながら、このような間隙部ｂを設けておくと、雨水がこの間隙部ｂの上方からピット21内に浸入して免震装置25等に悪影響を及ぼすことになる。
【０００５】
従って、ピット21内への雨水の浸入を防止するために、従来から建築物30の最下層階側の外壁に上記間隙部ｂを覆ったキャンチスラブ32を突設し、このキャンチスラブ32の先端部を上記ピット21の擁壁24から外側の地表面上方にまで突出させ且つ該キャンチスラブ32の上面を先端に向かって下方に傾斜する傾斜面に形成して雨水を擁壁外にまで案内し、キャンチスラブ32の先端部下面に設けている水切り部33から擁壁外の地表面に滴下或いは流下させている。
【０００６】
【発明が解決しようとする課題】
しかしながら、上記免震建築物30を狭い敷地内に構築する場合には、キャンチスラブ32の先端部がピット21の擁壁24から敷地境界線Ａ側に突出しているので、該キャンチスラブ32の先端と敷地境界線Ａとの間の幅がそれだけ狭くなることになる。この幅ａは、一般的に避難時等において人が通行可能な65cm幅にしておくことが要求されるが、上記のように水切りのためにキャンチスラブ32の先端部を擁壁24から敷地境界線Ａ側に突出させると、上記必要な幅を確保することが困難になるという問題点があった。
【０００７】
さらに、キャンチスラブ32の張り出し長さをその先端がピット21の擁壁24から外側の地表面上に達するまで長くすると、強度上、その厚みを増大させたり、梁を設ける必要が生じて建築費が高くつくという問題点があった。
【０００８】
本発明は上記のような問題点に鑑みてなされたもので、キャンチスラブの張り出し長さを短くしているにもかかわらず、該キャンチスラブの先端水切り部からの擁壁外への雨水の確実な排出を可能にし、敷地境界線とキャンチスラブの先端間に上記必要な幅を確保し得るようにした免震建築物の下部構造を提供することを目的とする。
【０００９】
【課題を解決するための手段】
上記目的を達成するために、本発明の免震建築物の下部構造は、請求項１に記載したように、基礎上に設けたピット内に免震装置を設置し、この免震装置によって建築物を支持させていると共に建築物の下部から水平方向に先端部が上記ピットの擁壁上に達する位置までキャンチスラブを張り出して該キャンチスラブの先端部下面に設けている水切り部から滴下する水を擁壁外に排出するように構成している免震構造物の下部構造において、上記キャンチスラブの先端面を擁壁の外側面から地表面側に突出させることなく擁壁の外壁面の上方、又は、該外壁面から内側に没入させた位置となるようにキャンチスラブの張り出し長さを設定していると共に、擁壁の上端面に擁壁の幅方向の中央部から該擁壁の外側面上端に向かって斜め下方に傾斜した傾斜面からなる排水案内面を形成してあり、この排水案内面に上記キャンチスラブの先端部下面に設けている水切り部を近接させた状態で対向させてなる構造としている。
【００１０】
【作用】
建築物の下部に張り出しているキャンチスラブによってピットの擁壁とピット内における建築物の下部との間の間隙部を覆っており、従って、雨水が該間隙部に浸入することなくこのキャンチスラブの上面を伝って該キャンチスラブの先端部に達し、その先端部下面に設けている水切り部によって擁壁の上端面上に滴下、或いは流下する。この際、擁壁の上端面には雨水を擁壁外に排出する案内面を形成しているので、水切り部を設けているキャンチスラブの先端部を擁壁外の地表面側に突出させることなく、水切り部から擁壁の上端面上に滴下、或いは流下する雨水を上記案内面によって擁壁外の地表面に確実に排出することができる。
【００１１】
このように、キャンチスラブの先端部を擁壁から外側に突出させることなく雨水の排出が行えるので、キャンチスラブの先端面と敷地境界線との間の幅を広くとることができ、従って、避難時等において人が通行するのに必要な幅を確保することができるものであり、また、キャンチスラブの張り出し長さが短いので、肉厚を薄くしても所定の強度を維持し得るから、材料費の削減を図ることができる。
【００１２】
擁壁の上端面やこの擁壁の上端からピット内に向かって突設している突縁部の上端面に形成した上記排水案内面としては、擁壁の外側面に向かって斜め下方に傾斜させた傾斜面からなるので、形状が簡単で容易に形成することができると共にこの傾斜面によって確実に擁壁外に排出することができる。
【００１３】
【発明の実施の形態】
次に、本発明の具体的な実施の形態を図面について説明すると、１は敷地境界線Ａに隣接した地中に掘削、形成している所定深さの基礎部造成用ピットで、このピット１の下方の地中にコンクリートの打設によって基礎２を造成していると共に該基礎２の上端に連なるピット１の底面に基礎２と一体の一定厚みを有するピット床スラブ３を同じくコンクリートの打設によって造成してあり、さらに、ピット２の周壁面に下端が床スラブ３と一体化し、上端面がピット１の開口端、即ち、地表面Ｂに達している所定の肉厚を有する擁壁４をコンクリートの打設によって一体に造成している。この擁壁４の上端面には、その幅方向の中央部から地表面Ｂ側、即ち、該擁壁４の外壁面上端に向かって斜め下方に傾斜した傾斜面からなる排水案内面4aを形成している。
【００１４】
また、上記ピット１内において、その床スラブ３上の複数箇所には免震装置５が設置されてあり、これらの免震装置５によって建築物10を支持させている。詳しくは、建築物10における各柱11の下方に位置する床スラブ３上にこの床スラブ３と一体に造成した一定高さを有するコンクリート製の短柱形状の下側支持部材６を配設し、各下側支持部材６上に上記免震装置５を載置してその下面を下側支持部材６に固定していると共にこの免震装置５上に同じく一定高さを有するコンクリート製の短柱形状の上側支持部材７を載置してその下面を免震装置５の上面に固定してあり、該上側支持部材７の上面で建築物10の柱11の下端面を支持している。
【００１５】
上記免震装置５としては、ゴム板を積層してなる積層ゴムや、ゴム板と金属板との積層体、或いは、すべり支承、転がり支承、弾塑性減衰材、流体系減衰材等の適宜な免震装置を採用することができる。
【００１６】
ピット１内に設置された上記免震装置５において、建築物10の外壁側の柱11を支持している免震装置５上の上側支持部材７とピット１の擁壁４とは、地震発生時に互いの衝突を避けるために、所定幅（距離）の間隙部ｂを存して対向している。この間隙部ｂの幅寸法は、予想される大地震時の解析水平変位量に余裕をもたせた寸法であって、一般的には50cm位に設定されている。
【００１７】
上記建築物10における最下階層（一階層）の床スラブ12は、ピット１の上端開口部の高さ位置に設けられていると共にこの高さ位置に相当する建築物10の下部外壁に、該外壁から水平方向に先端部が上記擁壁４の上方に達する位置までキャンチスラブ13を張り出してあり、このキャンチスラブ13によってピット１の擁壁４と免震装置５上の上側支持部材７間の間隙部ｂの上方空間部を覆って雨水がピット１内に吹き込むのを防止している。
【００１８】
キャンチスラブ13はその上面を建築物10の外壁側から先端に向かって下方に緩傾斜した傾斜面13a に形成していると共に、先端部下面を擁壁４の上端面から上方に僅かな隙間を存して対向させてあり、さらに、その先端面13b は地表面Ｂ側に突出することなく擁壁４の外壁面の上方、又は、該外壁面から内側に没入させた位置となるようにキャンチスラブ13の張り出し長さを設定して該キャンチスラブ13の先端面13b と敷地境界線Ａとの間の幅（距離）ａを避難時等において人が通行可能な65cm幅以上に形成していると共に、キャンチスラブ13の先端部下面に、擁壁４の上端面に形成している上記排水案内面4aに近接させた状態で対向した断面下向きコ字状の水切り部14を設けている。
【００１９】
このように建築物10の下部構造を構成しているので、降雨時において雨水がキャンチスラブ13の傾斜上面を伝って先端に達すると、その先端面13b から滴下、或いは流下すると共に該先端面13b の下端から内側に回り込んだ雨水は水切り部14によってそれ以上建築物10側に流動するのを阻止され、該水切り部14によって水切りされて擁壁４の排水案内面4a上に滴下或いは流下し、該案内面4aを通じて擁壁４外の地表面Ｂ側に排水される。
【００２０】
【発明の効果】
以上のように本発明の免震建築物の下部構造によれば、基礎上に設けたピット内に免震装置を設置し、この免震装置によって建築物を支持させていると共に建築物の下部から水平方向に先端部が上記ピットの擁壁上に達する位置までキャンチスラブを張り出して該キャンチスラブの先端部下面に設けている水切り部から滴下する水を擁壁外に排出するように構成している免震構造物の下部構造において、上記キャンチスラブの先端面を擁壁の外側面から地表面側に突出させることなく擁壁の外壁面の上方、又は、該外壁面から内側に没入させた位置となるようにキャンチスラブの張り出し長さを設定していると共に、擁壁の上端面に排水案内面を形成してこの排水案内面に上記キャンチスラブの先端部下面に設けている水切り部を近接させた状態で対向させているので、キャンチスラブの張り出し長さが短くなって敷地境界線と該キャンチスラブの先端面との間に、避難時等において人が通行するのに必要な十分な幅を確保することができるものであり、その上、キャンチスラブの張り出し長さが短いので、肉厚を薄くしても所定の強度を得ることができると共に材料費の削減を図ることができるものである。
【００２１】
さらに、キャンチスラブの先端部下面に設けている水切り部をピットの擁壁の上端排水案内面上に対向させているので、キャンチスラブの張り出し長さを短くしているにもかかわらず、キャンチスラブの水切り部から擁壁の上端面上に滴下、或いは流下する雨水を上記案内面によって擁壁外の地表面に確実に排出することができる。
【図面の簡単な説明】
【図１】 本発明の一実施の形態を示す縦断側面図、
【図２】 その要部の拡大縦断側面図、
【図３】 従来例を示す縦断側面図。
【符号の説明】
Ａ 敷地境界線
Ｂ 地表面
１ ピット
２ 基礎
３ ピットの床スラブ
４ 擁壁
4a 排水案内面
５ 免震装置
10 建築物
13 キャンチスラブ
14 水切り部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a substructure in a seismic isolation building supported by a seismic isolation device installed on a foundation.
[0002]
[Prior art]
In order to prevent the building from shaking greatly due to earthquakes and strong winds, a seismic isolation device is interposed between the foundation and the building, and this seismic isolation device absorbs vibrations generated during earthquakes, etc. Seismic isolation buildings are widely known.
[0003]
As one specific structure of such a base-isolated building, as shown in FIG. 4, a pit 21 having a predetermined depth is excavated in the ground and a foundation 22 is formed on the ground below the pit 21. The pit floor slab 23 constructed on the bottom surface of the pit 21 is supported by the lever base 22, and lower support members 26 having a predetermined height are integrally placed at a plurality of locations on the pit floor slab 23, and There is a seismic isolation building in which a seismic isolation device 25 is installed on the lower support member 26 and a building 30 is supported on the seismic isolation device 25 via an upper support member 27.
[0004]
In the seismic isolation structure configured in this way, there is a possibility that the retaining wall 24 of the pit 21 and the upper support member 27 on the seismic isolation device 25 may collide due to vibration when an earthquake occurs. The gap b between the opposing surfaces of the retaining wall 24 and the upper support member 27 is set to a distance that provides a margin for the expected maximum horizontal displacement. However, if such a gap b is provided, rainwater enters the pit 21 from above the gap b and adversely affects the seismic isolation device 25 and the like.
[0005]
Therefore, in order to prevent the intrusion of rainwater into the pit 21, a cantilever slab 32 that covers the gap b is conventionally provided on the outer wall on the lowest floor of the building 30, and the tip of the cantilever slab 32 is provided. The portion is projected from the retaining wall 24 of the pit 21 to the upper side of the outer ground surface, and the upper surface of the cantilever slab 32 is formed as an inclined surface that is inclined downward toward the tip to guide rainwater to the outside of the retaining wall. The cantilever slab 32 is dropped or flowed down from the draining portion 33 provided on the lower surface of the distal end portion to the ground surface outside the retaining wall.
[0006]
[Problems to be solved by the invention]
However, when the seismic isolation building 30 is constructed in a narrow site, the tip of the cantilever slab 32 protrudes from the retaining wall 24 of the pit 21 toward the site boundary A. And the site boundary A will be reduced accordingly. The width a is generally required to be 65 cm wide so that people can pass during evacuation, etc., but the tip of the cantilever slab 32 is removed from the retaining wall 24 for the drainage as described above. When protruding to the line A side, there is a problem that it is difficult to ensure the necessary width.
[0007]
Furthermore, if the overhang length of the cantilever slab 32 is increased until the tip reaches the outer surface of the ground from the retaining wall 24 of the pit 21, it is necessary to increase the thickness or to provide a beam for the construction cost. There was a problem that it was expensive.
[0008]
The present invention has been made in view of the above-described problems. Despite the fact that the overhang length of the cantilever slab is shortened, the rainwater from the tip draining portion of the cantilever slab to the outside of the retaining wall is surely secured. It is an object of the present invention to provide a lower structure of a base-isolated building that can be easily discharged and can secure the necessary width between the boundary line of the site and the tip of the cantilever slab.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the substructure of the seismic isolation building according to the present invention has a seismic isolation device installed in a pit provided on the foundation, as described in claim 1, and is constructed by this seismic isolation device. Water that supports the object and extends from the lower part of the building to the position where the tip part reaches the retaining wall of the pit in the horizontal direction and drops from the draining part provided on the lower surface of the tip part of the cantilever slab In the lower structure of the seismic isolation structure configured to discharge the outside of the retaining wall, above the outer wall surface of the retaining wall without protruding the tip surface of the cantilever slab from the outer surface of the retaining wall to the ground surface side. Or, the overhang length of the cantilever slab is set so as to be immersed inward from the outer wall surface, and the upper end surface of the retaining wall extends from the center in the width direction of the retaining wall to the outside of the retaining wall. Inclined downward toward the top of the side The Yes to form an inclined surface drain guide surfaces made of, has a structure in which it is opposed in a state of being close to the draining portion which is provided on the lower surface of the distal end portion of the Kyanchisurabu this drain guide face.
[0010]
[Action]
A cantilever slab overhanging the lower part of the building covers the gap between the retaining wall of the pit and the lower part of the building in the pit, so that rainwater does not enter the gap and It reaches the tip of the cantilever slab along the upper surface, and drops or flows down on the upper end surface of the retaining wall by a draining portion provided on the lower surface of the tip. At this time, a guide surface for discharging rainwater to the outside of the retaining wall is formed on the upper end surface of the retaining wall, so that the tip of the cantilever slab provided with a draining portion protrudes to the ground surface outside the retaining wall. In addition, rainwater that drops or flows down on the upper end surface of the retaining wall from the draining portion can be reliably discharged to the ground surface outside the retaining wall by the guide surface.
[0011]
In this way, rainwater can be discharged without protruding the tip of the cantilever slab outward from the retaining wall, so the width between the tip of the cantilever slab and the site boundary can be widened, and therefore evacuation is possible. It is possible to secure the width necessary for people to pass at times, etc., and since the overhang length of the cantilever slab is short, the predetermined strength can be maintained even if the wall thickness is reduced, Material costs can be reduced.
[0012]
The drainage guide surface formed on the upper end surface of the retaining wall and the upper end surface of the projecting edge projecting from the upper end of the retaining wall into the pit is inclined obliquely downward toward the outer surface of the retaining wall. Since the inclined surface is formed, the shape is simple and can be easily formed, and the inclined surface can be reliably discharged out of the retaining wall.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Next, a specific embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a foundation-forming pit having a predetermined depth excavated and formed in the ground adjacent to the site boundary A. The foundation 2 is constructed by placing concrete in the ground below the pit, and a concrete pit floor slab 3 having a certain thickness integral with the foundation 2 is placed on the bottom of the pit 1 connected to the upper end of the foundation 2. Further, the retaining wall 4 having a predetermined wall thickness is formed such that the lower end is integrated with the floor slab 3 on the peripheral wall surface of the pit 2 and the upper end surface reaches the opening end of the pit 1, that is, the ground surface B. Are made in one piece by placing concrete. A drainage guide surface 4a is formed on the upper end surface of the retaining wall 4 from an inclined surface inclined obliquely downward from the center in the width direction to the ground surface B side, that is, toward the upper end of the outer wall surface of the retaining wall 4. is doing.
[0014]
In the pit 1, seismic isolation devices 5 are installed at a plurality of locations on the floor slab 3, and the building 10 is supported by these seismic isolation devices 5. More specifically, a concrete short column-shaped lower support member 6 having a certain height and formed integrally with the floor slab 3 is disposed on the floor slab 3 positioned below each column 11 in the building 10. The above-mentioned seismic isolation device 5 is placed on each lower support member 6 and its lower surface is fixed to the lower support member 6, and a short concrete made of concrete having a constant height on this seismic isolation device 5. A columnar upper support member 7 is placed and its lower surface is fixed to the upper surface of the seismic isolation device 5, and the lower surface of the column 11 of the building 10 is supported by the upper surface of the upper support member 7.
[0015]
The seismic isolation device 5 may be an appropriate material such as a laminated rubber formed by laminating rubber plates, a laminated body of rubber plates and metal plates, a sliding support, a rolling support, an elastoplastic damping material, a fluid damping material, or the like. Seismic isolation devices can be used.
[0016]
In the seismic isolation device 5 installed in the pit 1, the upper support member 7 on the seismic isolation device 5 supporting the pillar 11 on the outer wall side of the building 10 and the retaining wall 4 of the pit 1 cause an earthquake. In order to avoid a collision with each other, sometimes they face each other with a gap b of a predetermined width (distance). The width dimension of the gap b is a dimension that provides a margin for the amount of horizontal displacement that can be expected during a major earthquake, and is generally set to about 50 cm.
[0017]
The floor slab 12 at the lowest level (one level) in the building 10 is provided at the height position of the upper end opening of the pit 1 and is attached to the lower outer wall of the building 10 corresponding to this height position. A cantilever slab 13 is projected from the outer wall to a position where the tip portion reaches the upper side of the retaining wall 4 in the horizontal direction. The cantilever slab 13 extends between the retaining wall 4 of the pit 1 and the upper support member 7 on the seismic isolation device 5. Rain water is prevented from blowing into the pit 1 by covering the space above the gap b.
[0018]
The upper surface of the cantilever slab 13 is formed as an inclined surface 13a that is gently inclined downward from the outer wall side of the building 10 toward the tip, and a slight gap is formed on the lower surface of the tip from the upper end surface of the retaining wall 4 upward. Furthermore, the cantilever is positioned so that the tip end surface 13b is located above the outer wall surface of the retaining wall 4 or inside the outer wall surface without projecting to the ground surface B side. The overhang length of the slab 13 is set, and the width (distance) a between the tip end surface 13b of the cantilever slab 13 and the site boundary A is formed to be 65 cm or more that can be passed by a person during evacuation. At the same time, on the lower surface of the tip end portion of the cantilever slab 13, there is provided a water draining portion 14 having a U-shaped section facing downward in the state of being close to the drainage guide surface 4a formed on the upper end surface of the retaining wall 4.
[0019]
Since the lower structure of the building 10 is configured in this way, when rainwater reaches the front end along the inclined upper surface of the cantilever slab 13 during rain, the front end surface 13b drops or flows down from the front end surface 13b. The rainwater that circulates inward from the lower end of the water is prevented from flowing further to the building 10 side by the draining portion 14, and is drained by the draining portion 14 to drop or flow down on the drainage guide surface 4 a of the retaining wall 4. The water is drained to the ground surface B side outside the retaining wall 4 through the guide surface 4a .
[0020]
【The invention's effect】
As described above, according to the lower structure of the seismic isolation building of the present invention, the seismic isolation device is installed in the pit provided on the foundation, and the building is supported by the seismic isolation device and the lower part of the building. The cantilever slab protrudes to a position where the tip part reaches the retaining wall of the pit in the horizontal direction, and the water dripping from the draining part provided on the lower surface of the tip part of the cantilever slab is discharged to the outside of the retaining wall. In the substructure of the seismic isolation structure, the tip surface of the cantilever slab is immersed above the outer wall surface of the retaining wall or inside from the outer wall surface without protruding from the outer surface of the retaining wall to the ground surface side. The overhanging length of the cantilever slab is set so as to be in the position, and the drainage guide surface is formed on the upper end surface of the retaining wall, and the drainage portion provided on the lower surface of the tip end portion of the cantilever slab on the drainage guide surface Close Since it is opposed by state, between the front end surface of the property line and said Kyanchisurabu overhang length of Kyanchisurabu is shortened, ensuring sufficient width required for passing the human in evacuation, etc. In addition, since the overhang length of the cantilever slab is short, a predetermined strength can be obtained even when the wall thickness is reduced, and the material cost can be reduced.
[0021]
Furthermore, since the draining portion provided on the lower surface of the tip of the cantilever slab is opposed to the upper drainage guide surface of the retaining wall of the pit, the cantilever slab is shortened even though the overhang length of the cantilever slab is shortened. Rainwater that drops or flows down on the upper end surface of the retaining wall from the draining portion can be reliably discharged to the ground surface outside the retaining wall by the guide surface.
[Brief description of the drawings]
FIG. 1 is a longitudinal side view showing an embodiment of the present invention,
FIG. 2 is an enlarged vertical side view of the main part,
FIG. 3 is a longitudinal side view showing a conventional example.
[Explanation of symbols]
A Site boundary line B Ground surface 1 Pit 2 Foundation 3 Pit floor slab 4 Retaining wall
4a Drainage guide surface 5 Seismic isolation device
10 Building
13 Cantilever slab
14 Drainer

Claims (1)

基礎上に設けたピット内に免震装置を設置し、この免震装置によって建築物を支持させていると共に建築物の下部から水平方向に先端部が上記ピットの擁壁上に達する位置までキャンチスラブを張り出して該キャンチスラブの先端部下面に設けている水切り部から滴下する水を擁壁外に排出するように構成している免震構造物の下部構造において、上記キャンチスラブの先端面を擁壁の外側面から地表面側に突出させることなく擁壁の外壁面の上方、又は、該外壁面から内側に没入させた位置となるようにキャンチスラブの張り出し長さを設定していると共に、擁壁の上端面に擁壁の幅方向の中央部から該擁壁の外側面上端に向かって斜め下方に傾斜した傾斜面からなる排水案内面を形成してあり、この排水案内面に上記キャンチスラブの先端部下面に設けている水切り部を近接させた状態で対向させていることを特徴とする免震建築物の下部構造。A seismic isolation device is installed in the pit provided on the foundation, and the building is supported by this seismic isolation device, and the cantilever is reached from the bottom of the building to the position where the tip reaches the pit retaining wall in the horizontal direction. In the lower structure of the seismic isolation structure configured to overhang the slab and to drain water dripping from the draining portion provided on the lower surface of the front end of the cantilever slab, the front end surface of the cantilever slab is The overhang length of the cantilever slab is set so that it is located above the outer wall surface of the retaining wall without being protruded from the outer surface of the retaining wall to the ground surface side, or at a position where it is immersed inside from the outer wall surface. The drainage guide surface is formed on the upper end surface of the retaining wall from the central portion in the width direction of the retaining wall and is inclined obliquely downward toward the upper end of the outer surface of the retaining wall. The tip of the cantilever slab Substructure seismic isolation building, characterized in that it is opposed in a state of being close to the draining portion which is provided on the lower surface.
JP2001281864A 2001-09-17 2001-09-17 Substructure of base-isolated building Expired - Fee Related JP4638095B2 (en)

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CN104452999B (en) * 2013-09-23 2016-08-10 建研科技股份有限公司 Self-displacement shock insulation trench system
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58108015U (en) * 1982-01-20 1983-07-22 株式会社竹中工務店 Waterproof structure for curtain wall side joints applying isobaric theory
JPH11131601A (en) * 1997-11-04 1999-05-18 Yurugi Kensetsu Kk Base isolation building with clearance intercepting device inserted in it
JP2000145200A (en) * 1998-11-05 2000-05-26 Soken Sekkei:Kk Aspect-ratio vibration-isolation device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58108015U (en) * 1982-01-20 1983-07-22 株式会社竹中工務店 Waterproof structure for curtain wall side joints applying isobaric theory
JPH11131601A (en) * 1997-11-04 1999-05-18 Yurugi Kensetsu Kk Base isolation building with clearance intercepting device inserted in it
JP2000145200A (en) * 1998-11-05 2000-05-26 Soken Sekkei:Kk Aspect-ratio vibration-isolation device

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