JPH09177062A - Method of renewing existing channel - Google Patents
Method of renewing existing channelInfo
- Publication number
- JPH09177062A JPH09177062A JP7339552A JP33955295A JPH09177062A JP H09177062 A JPH09177062 A JP H09177062A JP 7339552 A JP7339552 A JP 7339552A JP 33955295 A JP33955295 A JP 33955295A JP H09177062 A JPH09177062 A JP H09177062A
- Authority
- JP
- Japan
- Prior art keywords
- concrete
- steel
- underwater
- steel lid
- lid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Bulkheads Adapted To Foundation Construction (AREA)
- Revetment (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、比較的大きい流速
を持つ水路を、水流を遮断することなく更新する既設水
路の更新方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an existing waterway renewal method for renewing a waterway having a relatively high flow velocity without interrupting the water flow.
【０００２】[0002]
【従来の技術】発電所等の放水路のように壁を鋼矢板で
形成した既設水路は、鋼矢板の腐食のために水路を更新
する必要がある。図３は従来の鋼矢板留めによる既設水
路の更新工法の説明図で、既設水路の鋼矢板の壁１から
間隔をおいて鋼矢板２ａ，２ｂを地中に打ち込み、両側
の鋼矢板２ａ，２ｂ間にＨ型鋼の腹起し３にＨ型鋼の切
梁４を渡して鋼矢板２ａ，２ｂが動かないように支持
し、既設水路の壁１と鋼矢板２ａ，２ｂとの間に裏込め
砂５を埋めて鋼矢板留めを行うものである。2. Description of the Related Art An existing water channel whose wall is formed of steel sheet pile, such as a water discharge channel of a power plant, needs to be renewed due to corrosion of the steel sheet pile. FIG. 3 is an explanatory diagram of a conventional method for renewing an existing water channel by fastening steel sheet piles. Steel sheet piles 2a, 2b are driven into the ground at intervals from a wall 1 of the steel sheet pile of the existing water channel, and steel sheet piles 2a, 2b on both sides are inserted. An H-shaped steel beam 2 is passed between the H-shaped steel uprising 3 to support the steel sheet piles 2a and 2b so that they do not move, and backfill sand is provided between the wall 1 of the existing water channel and the steel sheet piles 2a and 2b. 5 is filled up with steel sheet pile fastening.
【０００３】しかしながら、流速が１．０ｍ／ｓｅｃ以
上の大きい流速を持つ水流の水路及び地中に障害物があ
る場合には、鋼矢板の打ち込みが難しく、鋼矢板留めが
困難である。そのため、壁及び底版を共にプレキャスト
コンクリートで準備し、既設水路に設置する施工法がと
られる。However, when there are obstacles in the waterway and the underground of the water flow having a high flow velocity of 1.0 m / sec or more, it is difficult to drive the steel sheet pile and it is difficult to fasten the steel sheet pile. Therefore, a construction method is adopted in which both the wall and the bottom slab are prepared with precast concrete and installed in the existing waterway.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、前記の
プレキャストコンクリートによる施工法の場合、底版の
プレキャストが大規模となり、コスト高になるという問
題がある。However, in the case of the above-mentioned construction method using precast concrete, there is a problem that the precast of the slab becomes large in scale and the cost becomes high.
【０００５】そこで、本発明は、高流速下で、且つ地中
障害物により鋼矢板留めが困難な大断面水路を低コスト
で更新する工法を提供するものである。Therefore, the present invention provides a method for renewing a large cross-section water channel, which is difficult to fasten with steel sheet pile due to an obstacle in the ground at a high flow velocity, at low cost.
【０００６】[0006]
【課題を解決するための手段】本発明は、プレキャスト
コンクリート壁を既設水路の両壁に沿って配設し、水路
の上流側と下流側の底部にコンクリートブロックを設置
し、次にフーチング部とコンクリートブロックとの隙間
に鋼製型枠を固定し、さらに、フーチング部の上にコン
クリート打設孔が設けられた鋼製蓋を被せ、コンクリー
トブロック、鋼製型枠及び鋼製蓋とにより形成されたコ
ンクリートの型枠内に水中コンクリートを鋼製蓋の打設
孔から注入して底版を形成して既設水路を更新する。According to the present invention, a precast concrete wall is arranged along both walls of an existing water channel, concrete blocks are installed on the upstream and downstream bottoms of the water channel, and then a footing section is provided. A steel formwork is fixed in the gap with the concrete block, and a steel lid with a concrete casting hole is placed on the footing part to form a concrete block, a steel formwork, and a steel lid. Underwater concrete is poured into the concrete formwork from the pouring hole of the steel lid to form the bottom slab and the existing waterway is renewed.
【０００７】[0007]
【発明の実施の形態】図１は本発明による既設水路の更
新方法の説明図，図２は底版水中コンクリート打設の説
明図で、プレキャストコンクリート壁６を既設水路の両
壁に沿って配設する。次いで、放水路の上流側と下流側
の底部に、水中コンクリートの現場打設時に水流によっ
てフレッシュコンクリートが流出しないように止水を兼
ねた流出止めのコンクリートブロック１２を並べる。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory view of an existing waterway renewal method according to the present invention, and FIG. 2 is an explanatory drawing of bottom slab underwater concrete pouring. Precast concrete walls 6 are arranged along both walls of the existing waterway. To do. Next, on the upstream and downstream bottoms of the discharge channel, concrete blocks 12 for spilling water are arranged so as to prevent fresh concrete from spilling due to the water flow when the underwater concrete is cast on site.
【０００８】フーチング部８とコンクリートブロック１
２の隙間は、鋼製型枠９を固定し塞ぐ。Footing 8 and concrete block 1
The gap of 2 fixes and closes the steel frame 9.
【０００９】次いで、フーチング部８の上にコンクリー
ト打設孔１０が設けられた鋼製蓋１１を被せる。Next, a steel lid 11 having a concrete pouring hole 10 is placed on the footing portion 8.
【００１０】鋼製蓋のコンクリート打設孔の面積は、打
設した底版表面のフレッシュコンクリートが流速によっ
て流出せず、且つ水質汚濁が生じない範囲で水中コンク
リートを完全に充填できるようにするため、最適開孔面
積にするが、現場試験により水中コンクリート打設にお
ける開口率は、約２．５％以上でコンクリートの充填性
が１００％に達し、水質汚濁も生じないことが明らかと
なった。The area of the concrete pouring hole of the steel lid is such that the underwater concrete can be completely filled in such a range that the fresh concrete on the surface of the placed bottom slab does not flow out due to the flow velocity and water pollution does not occur. Although the optimum opening area was obtained, field tests revealed that the opening ratio in underwater concrete pouring was about 2.5% or more, the concrete fillability reached 100%, and no water pollution occurred.
【００１１】コンクリートブロック１２、鋼製型枠９及
び鋼製蓋１１とによりコンクリートの型枠が形成された
後、生コン車及びポンプ車により水中コンクリートが鋼
製蓋の打設孔から注入され、底版コンクリートが形成さ
れる。After a concrete form is formed by the concrete block 12, the steel form 9 and the steel lid 11, underwater concrete is poured from the placing hole of the steel lid by the ready-mix truck and the pump car, and the bottom plate is used. Concrete is formed.
【００１２】プレキャストコンクリート壁と既設水路の
壁との空間は、従来と同じく裏込め砂５で埋められ、そ
の上を上部コンクリート１４で仕上げる。The space between the precast concrete wall and the wall of the existing waterway is filled with backfill sand 5 as in the conventional case, and the upper concrete 14 is finished on it.
【００１３】[0013]
【発明の効果】底版部を水中コンクリートの現場打ちと
することで、通常のプレキャストコンクリートによるも
のに比べ安価である。また、長期耐久性も確保され、腐
食対策等のメインテナンスも不用となる。EFFECTS OF THE INVENTION The bottom slab is cast on-site with underwater concrete, which is less expensive than that of ordinary precast concrete. In addition, long-term durability is ensured and maintenance such as corrosion countermeasures becomes unnecessary.
【図１】本発明による既設水路の更新方法の説明図であ
る。FIG. 1 is an explanatory diagram of an existing waterway renewal method according to the present invention.
【図２】底版水中コンクリート打設の説明図である。FIG. 2 is an explanatory diagram of bottom plate underwater concrete pouring.
【図３】従来の鋼矢板留めによる既設水路の更新工法の
説明図である。FIG. 3 is an explanatory diagram of a conventional method for renewing an existing water channel by fastening a steel sheet pile.
１ 壁、 ２ａ，２ｂ 鋼矢板、 ３ 腹起し、 ４
切梁、 ５ 裏込め砂、６ プレキャストコンクリート
壁、 ７ 既設水路底部、 ８ フーチング部、 ９
鋼製型枠、 １０ コンクリート打設孔、１１ 鋼製
蓋、 １２ コンクリートブロック、 １３ 底版コン
クリート、 １４ 上部コンクリート1 wall, 2a, 2b steel sheet pile, 3 upset, 4
Cutting beam, 5 backfill sand, 6 precast concrete wall, 7 bottom of existing waterway, 8 footing, 9
Steel formwork, 10 Concrete pouring hole, 11 Steel lid, 12 Concrete block, 13 Bottom slab concrete, 14 Upper concrete
Claims (1)
の両壁に沿って配設し、水路の上流側と下流側の底部に
コンクリートブロックを設置し、次にフーチング部とコ
ンクリートブロックとの隙間に鋼製型枠を固定し、さら
に、フーチング部の上にコンクリート打設孔が設けられ
た鋼製蓋を被せ、コンクリートブロック、鋼製型枠及び
鋼製蓋とにより形成されたコンクリートの型枠内に水中
コンクリートを鋼製蓋の打設孔から注入して底版を形成
することを特徴とする既設水路の更新方法。1. A precast concrete wall is arranged along both walls of an existing water channel, concrete blocks are installed on the upstream and downstream bottoms of the water channel, and then a steel block is provided in the gap between the footing section and the concrete block. Fix the formwork, and then cover the footing with a steel lid with concrete pouring holes.Underwater in the concrete formwork made up of the concrete block, steel formwork and steel lid. A method for renewing an existing water channel, which comprises injecting concrete from a pouring hole in a steel lid to form a bottom slab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7339552A JPH09177062A (en) | 1995-12-26 | 1995-12-26 | Method of renewing existing channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7339552A JPH09177062A (en) | 1995-12-26 | 1995-12-26 | Method of renewing existing channel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09177062A true JPH09177062A (en) | 1997-07-08 |
Family
ID=18328555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7339552A Withdrawn JPH09177062A (en) | 1995-12-26 | 1995-12-26 | Method of renewing existing channel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09177062A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012070768A3 (en) * | 2010-11-23 | 2012-09-27 | Chung Kwang Ok | Method for constructing underwater structure |
| CN110541396A (en) * | 2019-09-18 | 2019-12-06 | 南水北调中线干线工程建设管理局 | underwater construction method for low-roughness mould bag concrete |
| CN111347560A (en) * | 2020-03-09 | 2020-06-30 | 黄河水利职业技术学院 | Agitating unit is used in hydraulic engineering construction |
| CN112796368A (en) * | 2020-12-31 | 2021-05-14 | 中国电力工程顾问集团中南电力设计院有限公司 | Method for repairing large-diameter water intake head top cover |
| JP2021092149A (en) * | 2021-03-19 | 2021-06-17 | Ｊｆｅ建材株式会社 | Water passage |
-
1995
- 1995-12-26 JP JP7339552A patent/JPH09177062A/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012070768A3 (en) * | 2010-11-23 | 2012-09-27 | Chung Kwang Ok | Method for constructing underwater structure |
| CN110541396A (en) * | 2019-09-18 | 2019-12-06 | 南水北调中线干线工程建设管理局 | underwater construction method for low-roughness mould bag concrete |
| CN111347560A (en) * | 2020-03-09 | 2020-06-30 | 黄河水利职业技术学院 | Agitating unit is used in hydraulic engineering construction |
| CN111347560B (en) * | 2020-03-09 | 2021-08-24 | 黄河水利职业技术学院 | Agitating unit is used in hydraulic engineering construction |
| CN112796368A (en) * | 2020-12-31 | 2021-05-14 | 中国电力工程顾问集团中南电力设计院有限公司 | Method for repairing large-diameter water intake head top cover |
| CN112796368B (en) * | 2020-12-31 | 2023-08-18 | 中国电力工程顾问集团中南电力设计院有限公司 | Repairing method for large-diameter water intake head top cover |
| JP2021092149A (en) * | 2021-03-19 | 2021-06-17 | Ｊｆｅ建材株式会社 | Water passage |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20030304 |