JP2006183362A - 推進管の坑内推進基地及びその構築方法 - Google Patents
推進管の坑内推進基地及びその構築方法 Download PDFInfo
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Abstract
【解決手段】 発進立坑1を所定深さまで掘削し、同発進立坑1の外周部に裏込め材Sを注入して地盤Gを強化し、発進立坑1の底部外周の地盤Gに充填材4を幅広く注入して地盤Gを強化し、同強化した地盤改良域4を発進立坑1の底部から推進方向側とその反対側それぞれに掘削して拡幅し、同拡幅した前方の空間に坑口の止水器10を設置し、後方の空間に推進管11を推進させる元押しジャッキ6を設置する。
【選択図】図1
Description
1) 推進工法で推進管を地中に埋入させる作業空間として構築される坑内推進基地において、発進立坑の底部を推進方向側とその反対側それぞれに拡幅し、同拡幅した前方の空間に推進管を挿入する坑口の止水器を設置し、後方の空間に推進管を推進させる元押しジャッキを設置し、発進立坑を小断面にできるようにしたことを特徴とする推進管の坑内推進基地
2) 発進立坑の断面が、推進管の長さより大きい断面で且つ推進管の長さの1.5倍より小さい断面である前記1)記載の推進管の坑内推進基地
3) 推進工法で推進管を地中に埋入させる作業空間として構築される坑内推進基地の構築方法において、発進立坑を所定深さまで掘削し、同発進立坑の外周部に裏込め材を注入して地盤を強化し、発進立坑の底部外周の地盤に充填材を幅広く注入して地盤を強化し、同強化した地盤を発進立坑の底部から推進方向側とその反対側それぞれに掘削して拡幅し、同拡幅した前方の空間に坑口の止水器を設置し、後方の空間に推進管を推進させる元押しジャッキを設置し、発進立坑を小断面にできるようにしたことを特徴とする推進管の坑内推進基地の構築方法
4) 発進立坑の断面が、推進管の長さより大きい断面で且つ推進管の長さ1.5倍より小さい断面である前記3)記載の推進管の坑内推進基地の構築方法
にある。
2 前方空間
2a 隔壁鉄板
2b 鋼製鞘管
2c 鋼製支保工
3 後方空間
3a 隔壁鉄板
3b 鋼製鞘管
3c 鋼製支保工
4 地盤改良域
5 基礎コンクリート
6 元押しジャッキ
6a シリンダ
7 発進架台
8 支圧壁
8a 支圧鉄板
9 押輪
10 止水器
11 推進管
12 クレーン
13 道路
14 計画管路
15 既設管路
15a,15b 移設管路
16 発進立坑(従来例)
G 地盤
H 作業者
S 裏込め材
Claims (4)
- 推進工法で推進管を地中に埋入させる作業空間として構築される坑内推進基地において、発進立坑の底部を推進方向側とその反対側それぞれに拡幅し、同拡幅した前方の空間に推進管を挿入する坑口の止水器を設置し、後方の空間に推進管を推進させる元押しジャッキを設置し、発進立坑を小断面にできるようにしたことを特徴とする推進管の坑内推進基地。
- 発進立坑の断面が、推進管の長さより大きい断面で且つ推進管の長さの1.5倍より小さい断面である請求項1記載の推進管の坑内推進基地。
- 推進工法で推進管を地中に埋入させる作業空間として構築される坑内推進基地の構築方法において、発進立坑を所定深さまで掘削し、同発進立坑の外周部に裏込め材を注入して地盤を強化し、発進立坑の底部外周の地盤に充填材を幅広く注入して地盤を強化し、同強化した地盤を発進立坑の底部から推進方向側とその反対側それぞれに掘削して拡幅し、同拡幅した前方の空間に坑口の止水器を設置し、後方の空間に推進管を推進させる元押しジャッキを設置し、発進立坑を小断面にできるようにしたことを特徴とする推進管の坑内推進基地の構築方法。
- 発進立坑の断面が、推進管の長さより大きい断面で且つ推進管の長さ1.5倍より小さい断面である請求項3記載の推進管の坑内推進基地の構築方法。
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Cited By (1)
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JP2009144468A (ja) * | 2007-12-17 | 2009-07-02 | Daniel Sogo Kenkyusho:Kk | 十字型発進立坑構造 |
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JP2009144468A (ja) * | 2007-12-17 | 2009-07-02 | Daniel Sogo Kenkyusho:Kk | 十字型発進立坑構造 |
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