JP4370359B1 - 液状化防止構造 - Google Patents
液状化防止構造 Download PDFInfo
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- JP4370359B1 JP4370359B1 JP2008169185A JP2008169185A JP4370359B1 JP 4370359 B1 JP4370359 B1 JP 4370359B1 JP 2008169185 A JP2008169185 A JP 2008169185A JP 2008169185 A JP2008169185 A JP 2008169185A JP 4370359 B1 JP4370359 B1 JP 4370359B1
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Abstract
【解決手段】非液状化層3の上に堆積した液状化層2に上面と下面とが開口した平面視格子状の浮き型格子壁体1を形成することにより、地盤の液状化を防止した液状化防止構造において、浮き型格子壁体1の格子の各辺を壁高tの0.4〜0.8倍にするとともに、浮き型格子壁体1を非液状化層3から浮かせた状態で形成するようにしたので、浮き型格子壁体1の壁高tを小さくでき、経済的な液状化防止構造を提供することができる。
【選択図】 図1
Description
2 液状化層
3 非液状化層
4 構造物
11 杭状部材
12 壁状部材
13 杭状部材
Δu 過剰間隙水圧
σv 有効土被り圧
ru 過剰間隙水圧比
t 浮き型格子壁体の壁高
L 浮き型格子壁体の格子の幅
H 液状化層の厚さ
αmax 最大加速度
kH 水平震度
FL 液状化抵抗率
Claims (8)
- 非液状化層の上に堆積した液状化層に下面が開口した平面視格子状の格子壁体を前記非液状化層から浮かせた状態となるように形成することにより、地盤の液状化を防止した液状化防止構造であって、
前記液状化層のうち非液状化層と格子壁体の下端との間となる液状化層の液状化が想定地震に対して抑制されるべく、格子壁体の下端近傍となる液状化層の過剰間隙水圧比が0.8以下かつせん断ひずみが0.01以下となるように前記格子壁体の壁高を設定したことを特徴とする液状化防止構造。 - 前記過剰間隙水圧比が0.3以上となるように、前記格子壁体の壁高を設定したことを特徴とする請求項1に記載の液状化防止構造。
- 前記格子壁体は、格子の幅を壁高の0.4〜0.8倍にしたことを特徴とする請求項1又は2に記載の液状化防止構造。
- 前記格子壁体は、少なくとも4.4メートル以上の壁高を有することを特徴とする請求項1〜3のいずれか一つに記載の液状化防止構造。
- 前記格子壁体の上に盤構造を設けたことを特徴とする請求項1〜5のいずれか一つに記載の液状化防止構造。
- 前記格子壁体の下部から非液状化層に到達する杭状部材または壁状部材を設けたことを特徴とする請求項1〜6のいずれか一つに記載の液状化防止構造。
- 支持する構造物の真下となる下方域と該下方域に隣接する液状化影響領域とを液状化対策領域とし、該液状化対策領域に格子壁体を形成したことを特徴とする請求項1〜7のいずれか一つに記載の液状化防止構造。
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JP2008169185A JP4370359B1 (ja) | 2008-06-27 | 2008-06-27 | 液状化防止構造 |
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JP2008169185A JP4370359B1 (ja) | 2008-06-27 | 2008-06-27 | 液状化防止構造 |
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JP4370359B1 true JP4370359B1 (ja) | 2009-11-25 |
JP2010007381A JP2010007381A (ja) | 2010-01-14 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5124697B1 (ja) * | 2012-06-05 | 2013-01-23 | 株式会社竹中土木 | 液状化防止構造および液状化防止工法 |
JP2013155560A (ja) * | 2012-01-31 | 2013-08-15 | Shimizu Corp | 構造物の液状化被害低減構造 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5088982B1 (ja) * | 2012-02-27 | 2012-12-05 | 株式会社サムシング | 屋外構造物基礎構造体 |
JP6681115B2 (ja) * | 2013-11-28 | 2020-04-15 | 三井住友建設株式会社 | 地盤の液状化対策構造の設計方法 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013155560A (ja) * | 2012-01-31 | 2013-08-15 | Shimizu Corp | 構造物の液状化被害低減構造 |
JP5124697B1 (ja) * | 2012-06-05 | 2013-01-23 | 株式会社竹中土木 | 液状化防止構造および液状化防止工法 |
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