JP3147793U - マンホールの地震時浮き上がり防止壁構造 - Google Patents
マンホールの地震時浮き上がり防止壁構造 Download PDFInfo
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- JP3147793U JP3147793U JP2008006155U JP2008006155U JP3147793U JP 3147793 U JP3147793 U JP 3147793U JP 2008006155 U JP2008006155 U JP 2008006155U JP 2008006155 U JP2008006155 U JP 2008006155U JP 3147793 U JP3147793 U JP 3147793U
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- 239000004575 stone Substances 0.000 claims description 3
- 239000002689 soil Substances 0.000 abstract description 7
- 238000009412 basement excavation Methods 0.000 abstract description 4
- 230000000630 rising effect Effects 0.000 abstract description 4
- 241001070941 Castanea Species 0.000 abstract description 3
- 235000014036 Castanea Nutrition 0.000 abstract description 3
- 239000010865 sewage Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- 230000007774 longterm Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
Description
この対策として、マンホールにかかる重量を大きくする，鋼棒などで非液状化層にアンカーするなどの方法が考えられるが、さらに構造面、施工性、安全性などに検討の余地が残されている。
この解決のため、工場製品のマンホール部材を現地で組み立てするとき、マンホールの自重を大きくするための部材を用意して、一連の組立作業を行うことにより短時間で工事を完成出来る。
図Ｉ［Ａ］は新設マンホールの縦断面図を示し、掘削終了後、基礎栗石５を敷き均して工場製品の底版３を設置する。この上に直壁管１ｃをのせ所定位置に下水管６を取り付けた後、場所打ちコンクリート底版４を打設、底版上面には下水路７を設ける。最上段の直壁管１ｃまで組み立てた段階で、マンホール直壁管の周囲を十分締め固めしながら埋め戻しする。
直壁管１ｃの上に中空コンクリート円筒管８をのせて，この管相互を連結板９で連結する。更にマンホール斜壁管１ｂ、マンホール蓋受け枠体１ａを組み立てる、この後、中空コンクリート円筒管８の円形突出部上面に十分に締めながら埋め戻し土１２を施工して、その上に舗装１０を行い完成する。
１ｂ 斜壁管
１ｃ 直壁管
２ マンホール蓋
３ 底版
４ 場所打ちコンクリート底版
５ 基礎栗石
６ 下水管
７ 下水路
８ 中空コンクリート円筒管
９ａ ボルト
９ｂ 結合板
９ｃ ナット
１０ａ 舗装
１０ｂ 液状化層
１１ 地下水位
１２ 埋め戻し土
Claims (2)
- マンホール直壁管の最上部に，内壁径はマンホール直壁管と同径で外壁径はマンホール直壁管外径の１．２−１．８倍の大きさをもつ，短い中空コンクリート円筒管が組み込まれて，マンホール直壁管の外側に突出部が形成され，突出部上面には埋め戻し砕石及び舗装がされてなることを特徴とするマンホール浮き上がり防止構造。
- 短い中空コンクリート円筒管の内壁と下段の直壁管の内壁は連結板で結合されてなることを特徴とする請求項１記載のマンホール浮き上がり防止構造。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008006155U JP3147793U (ja) | 2008-08-06 | 2008-08-06 | マンホールの地震時浮き上がり防止壁構造 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008006155U JP3147793U (ja) | 2008-08-06 | 2008-08-06 | マンホールの地震時浮き上がり防止壁構造 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP3147793U true JP3147793U (ja) | 2009-01-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2008006155U Expired - Lifetime JP3147793U (ja) | 2008-08-06 | 2008-08-06 | マンホールの地震時浮き上がり防止壁構造 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3147793U (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011012433A (ja) * | 2009-07-01 | 2011-01-20 | Hiroo Yamaguchi | マンホールの浮上防止構造 |
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2008
- 2008-08-06 JP JP2008006155U patent/JP3147793U/ja not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011012433A (ja) * | 2009-07-01 | 2011-01-20 | Hiroo Yamaguchi | マンホールの浮上防止構造 |
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