JPS6229616A - Constructing method for underwater reinforced concrete structure - Google Patents
Constructing method for underwater reinforced concrete structureInfo
- Publication number
- JPS6229616A JPS6229616A JP16595585A JP16595585A JPS6229616A JP S6229616 A JPS6229616 A JP S6229616A JP 16595585 A JP16595585 A JP 16595585A JP 16595585 A JP16595585 A JP 16595585A JP S6229616 A JPS6229616 A JP S6229616A
- Authority
- JP
- Japan
- Prior art keywords
- water
- frame units
- underwater
- reinforced concrete
- filling liquid
- 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.)
- Granted
Links
- 239000011150 reinforced concrete Substances 0.000 title claims description 15
- 238000000034 method Methods 0.000 title claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000007788 liquid Substances 0.000 claims abstract description 28
- 239000004567 concrete Substances 0.000 claims abstract description 15
- 239000004927 clay Substances 0.000 claims abstract description 5
- 238000010276 construction Methods 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 230000005484 gravity Effects 0.000 claims description 6
- 229920000642 polymer Polymers 0.000 claims description 3
- 239000000126 substance Substances 0.000 abstract description 5
- 229910000831 Steel Inorganic materials 0.000 abstract description 3
- 239000010959 steel Substances 0.000 abstract description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 abstract description 2
- 229910000278 bentonite Inorganic materials 0.000 abstract description 2
- 239000000440 bentonite Substances 0.000 abstract description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 abstract description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 abstract description 2
- 230000002787 reinforcement Effects 0.000 abstract description 2
- 239000000725 suspension Substances 0.000 abstract description 2
- 239000000945 filler Substances 0.000 abstract 5
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 238000009415 formwork Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 239000013535 sea water Substances 0.000 description 3
- 230000002411 adverse Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Landscapes
- Underground Or Underwater Handling Of Building Materials (AREA)
- Foundations (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は水中鉄筋コンクリート構造物の構築方法に関
する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) This invention relates to a method for constructing underwater reinforced concrete structures.
（従来技術と問題点）
従来、水中鉄筋コンクリート構造物、例えば橋脚、ｆｎ
台などを構築する方法としては、一般的にはコンクリー
ト構造物中に埋設される鉄筋を水中に設置した後に、高
セメント配合のコンクリートを水中打設する方法が簡便
なため採用されている。(Prior art and problems) Conventionally, underwater reinforced concrete structures, such as bridge piers, fn
The commonly used method for constructing a platform is to place reinforcing bars buried in a concrete structure underwater, and then pour concrete with a high cement content into the water because it is simple.
しかし、この方法では、水中特に海水中に構築する場合
、海水中の塩分など鉄筋コンクリート構造物に悪影響を
及ぼす成分を含有した状態で構築が行なわれ、高品質の
鉄筋コンクリート構造物を築造することが困難であった
。However, with this method, when building underwater, especially in seawater, the construction is carried out in a state that contains components that have a negative impact on reinforced concrete structures, such as salt in the seawater, making it difficult to construct high-quality reinforced concrete structures. Met.
このような悪影響を防止するためには、例えばコンクリ
ート構造物の構築予定地を液密性の締切工で囲繞し、内
部の水を排除して乾いた状態で施工することが望ましい
が、このためには締切工を水底の不透水層まで到達させ
、且つ液密性を確保するためには簡単な鋼矢板などを使
用づることかできず、仮設の締切工のための費用が嵩み
ずぎて現実的ではなかった。In order to prevent such negative effects, for example, it is desirable to surround the site where a concrete structure is planned to be constructed with a liquid-tight cofferdam to exclude any water inside and carry out construction in a dry state. In order to make the cofferdam reach the impermeable layer at the bottom of the water and ensure liquid-tightness, it is impossible to use simple steel sheet piles, and the cost for temporary cofferdams is high. It wasn't realistic.
この発明は以上のような問題点に鑑みてなされたもので
あって、その目的とするところは、比較的簡単な構成に
より容易に施工できるとともに、品質の安定した水中鉄
筋コンクリート構造物が得られる方法を提供することに
ある。This invention was made in view of the above-mentioned problems, and its purpose is to provide a method for obtaining an underwater reinforced concrete structure with a relatively simple structure, which can be easily constructed, and which has stable quality. Our goal is to provide the following.
（問題点を解決するための手段）
上記目的を達成するために、この発明は、水中にコンク
リートを打設して溝築される鉄筋コンクリート構造物の
構築方法において、該鉄筋コンクリート構造物の構築予
定地を水中底面から水面上まで到達する枠体で囲繞した
後、該枠体内の水を粘土質と高分子溶液とを含み該水と
ほぼ同じ比重を有する充填液で置換し、該充填液中に鉄
筋を配置した後、コンクリートを打設することを特徴と
する。(Means for Solving the Problems) In order to achieve the above object, the present invention provides a method for constructing a reinforced concrete structure in which concrete is cast in water and constructed in a trench, at a site where the reinforced concrete structure is to be constructed. is surrounded by a frame that reaches from the bottom of the water to above the water surface, and then the water in the frame is replaced with a filling liquid that contains clay and a polymer solution and has approximately the same specific gravity as the water. It is characterized by placing concrete after placing reinforcing bars.
（作 用）
コンクリート構造物中に埋設される鉄筋は、充填液中に
設置されて、水・海水との直接的な接触がなくなるため
、例えば塩分などの有害物質を含有したままでの築造が
完全に防止され、構造物の品質を安定且つ向上させる。(Function) Reinforcing bars buried in concrete structures are placed in the filling liquid and do not come into direct contact with water or seawater, so it is not possible to construct them while containing harmful substances such as salt. completely prevented, stabilizing and improving the quality of the structure.
また、充填液は置換する水と同程度の比重を有している
ため、枠体の内外に作用する水圧が均衡し、枠体を水・
海底面に深く根入れすることなく安定化できるとともに
、圧力のアンバランスによって、充填液が枠体外に漏出
することも排除できる。In addition, since the filling liquid has a specific gravity similar to that of the water to be replaced, the water pressure acting on the inside and outside of the frame is balanced, making the frame
It can be stabilized without being deeply embedded in the seabed surface, and it also eliminates the possibility of the filling liquid leaking out of the frame due to pressure imbalance.
（実 施 例）
以下、この発明の好適な実施例について添附図面を参照
にして詳細に説明する。(Embodiments) Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
第１図から第４図は、この発明に係る水中鉄筋コンクリ
ート構造物の構築方法の一例を工程順に示した概略縦断
面図である。1 to 4 are schematic vertical cross-sectional views showing an example of the method for constructing an underwater reinforced concrete structure according to the present invention in the order of steps.
同図に示す構築方法では、まず、第１図に示すように構
築されるコンクリート構造物の構築予定地を、例えば鋼
矢板を横方向に順次連結して囲繞し、枠体１を形成する
。In the construction method shown in FIG. 1, first, a frame 1 is formed by surrounding the planned construction site of the concrete structure to be constructed as shown in FIG. 1 by sequentially connecting steel sheet piles in the horizontal direction.
枠体１は水中底面１２から水面１４上まで到達するよう
にし、水中底面１２下の貫入量は不透水層まで到る必要
はなく、その自立状態が確保できる程度でよい。The frame 1 is designed to reach from the underwater bottom surface 12 to above the water surface 14, and the amount of penetration below the underwater bottom surface 12 does not need to reach the impermeable layer, but is sufficient to ensure its self-supporting state.
枠体１０の形成が終了すると、第２図に示すように、枠
体１０内の水と充填液１６との置換が行なわれる。When the formation of the frame 10 is completed, as shown in FIG. 2, the water in the frame 10 is replaced with the filling liquid 16.
充填液１６は、例えば水にベントナイトなどの粘土質を
加えた懸濁液に、Ｃ，Ｍ、Ｃ，ポリビニルアルコール等
の粘土質を分散させる高分子溶液を添加したものを用い
、充填液１６の比重はこれらの成分を調整して、置換さ
れる枠体１０内の水とほぼ同じにする。For example, the filling liquid 16 is made by adding a polymer solution that disperses clay such as C, M, C, and polyvinyl alcohol to a suspension of water and clay such as bentonite. By adjusting these components, the specific gravity is made almost the same as that of the water in the frame 10 to be replaced.
充填液１６と水との置換は、例えば充填液１６を先端が
水中底面１２になるようにセットされた圧送バイア１８
を用いて注入し、枠体１０内の水はポンプ２０で排出し
ながら行なう。To replace the filling liquid 16 with water, for example, the filling liquid 16 can be transferred through a pressure-feeding via 18 whose tip is set to the underwater bottom 12.
The water in the frame 10 is injected using a pump 20, and the water inside the frame 10 is discharged using a pump 20.
ここで、充填液１６と水の比重がほぼ等しいため、圧送
パイプ１８から吐出した充填液１６が、水中に分散した
りあるいは水と混合することを防ぐため、充填液１６と
水との界面に拡散抑制用のシート２２を介在させて行な
うことが望ましい。Here, since the specific gravity of the filling liquid 16 and the water are almost equal, in order to prevent the filling liquid 16 discharged from the pressure pipe 18 from dispersing in the water or mixing with water, the filling liquid 16 is placed at the interface between the filling liquid 16 and the water. It is preferable to interpose a sheet 22 for suppressing diffusion.
充填液１６と水との置換が終了すると、第３図に示すよ
うに、充填液１６中に鉄筋２４の設置が行なわれる。When the filling liquid 16 has been replaced with water, reinforcing bars 24 are installed in the filling liquid 16, as shown in FIG.
鉄筋２４は予め組立てられたものを使用し、構造物の外
周を画成する型枠２６に係由して、これらを同時に設置
してもよい。The reinforcing bars 24 may be pre-assembled, and they may be installed at the same time by being connected to a formwork 26 that defines the outer periphery of the structure.
鉄筋２４と型枠２６の設置が終了すると、第４図に示す
ように、型枠２Ｇ内へのコンクリート２８の注入が行な
われる。When the installation of the reinforcing bars 24 and the formwork 26 is completed, as shown in FIG. 4, concrete 28 is poured into the formwork 2G.
コンクリート２８の注入によりオーバーフローする充填
液１６はポンプＰで回収され、再使用に供される。Filling liquid 16 overflowing from pouring concrete 28 is recovered by pump P and reused.
そして、コンクリート２８の打設が終了して硬化づると
、型枠２６を１ｆｌＩ！去し、充填液１６を再び水と置
換しながら回収した後、枠体１０を撤去して工事が終わ
る。Then, when the concrete 28 has been poured and hardened, the formwork 26 is placed 1flI! After the filling liquid 16 is recovered while being replaced with water again, the frame body 10 is removed and the construction is completed.
さて、以上のようにして構築された鉄筋コンクリート構
造物では、鉄筋２４が充填液１６中に設置されるため、
塩分などの有害物質を含ノνだ水と直接接触することが
なく、また、充填液１６は鉄筋２やコンクリート２８に
何ら悪影響を及ぼさないため、構造物は乾燥状態で構築
した場合と（よ（ま同等の環境下で築造され、品質の安
定したものが得られる。Now, in the reinforced concrete structure constructed as described above, since the reinforcing bars 24 are installed in the filling liquid 16,
There is no direct contact with water containing harmful substances such as salt, and the filling liquid 16 does not have any adverse effect on the reinforcing bars 2 or concrete 28, so the structure is different from when constructed in a dry state. (It is built under the same environment and has stable quality.)
また、充填液１６は置換する水とほぼ同じ比重に調整さ
れているため、置換した際に枠体１０の内外で圧力が均
衡し、このため枠体１０の根入れをそれほど深くするこ
ともなく、厳重な液密状態とする必要もなく、施工も比
較的簡単になる。In addition, since the filling liquid 16 is adjusted to have almost the same specific gravity as the water to be replaced, the pressure is balanced inside and outside the frame 10 when the water is replaced, so that the frame 10 does not have to be deeply embedded. , there is no need for strict liquid-tight conditions, and construction is relatively simple.
なお、上記実施例では、枠体１０と型枠２６とを個別に
用いる場合を説明したが、本発明の実施はこれだけでな
く、枠体１０に型枠２６の機能を持たせ、枠体１０だけ
で施工することも可能である。In addition, in the above embodiment, the case where the frame body 10 and the formwork 26 are used separately has been described, but the present invention is not limited to this. It is also possible to construct it by yourself.
（発明の効果）
以上、実施例で詳細に説明したように、この発明に係る
水中鉄筋コンクリートＭ４造物の構築方法によれば、水
嵩中の有害物質を構造物中に含有させることなく施工で
きるため、構造物の品質を高度に維持できるとともに、
施工も容易に行えるなどの効果が得られる。(Effects of the Invention) As described above in detail in the Examples, according to the method for constructing an underwater reinforced concrete M4 structure according to the present invention, construction can be performed without containing harmful substances in the water volume into the structure. The quality of the structure can be maintained at a high level, and
Benefits include ease of construction.
第１図から第４図は本発明の一実施例を工程順に示すそ
れぞれの縦断面図である。
１０・・・・・・枠 体 １２・・・・・・水中
底面１４・・・・・・水 面 １６・・・・・・
充填液２４・・・・・・鉄 筋 ２６・・・・・
・型 枠特許出願人 株式会社 大 林
組代 理 人 弁理士 −色健輔第１
図
Ｉチ
第３図
第４図1 to 4 are longitudinal sectional views showing an embodiment of the present invention in the order of steps. 10...Frame body 12...Underwater bottom 14...Water surface 16...
Filling liquid 24...Reinforcement bar 26...
・Formwork patent applicant Obayashi Co., Ltd.
Group representative Patent attorney - Kensuke Iro 1st
Figure Ichi Figure 3 Figure 4
Claims (2)
ンクリート構造物の構築方法において、該鉄筋コンクリ
ート構造物の構築予定地を水中底面から水面上まで到達
する枠体で囲繞した後、該枠体内の水を該水とほぼ同じ
比重を有する充填液で置換し、該充填液中に鉄筋を配置
した後、コンクリートを打設することを特徴とする水中
鉄筋コンクリート構造物の構築方法。(1) In a method for constructing a reinforced concrete structure constructed by pouring concrete underwater, after surrounding the planned construction site of the reinforced concrete structure with a frame that reaches from the underwater bottom to above the water surface, A method for constructing an underwater reinforced concrete structure, which comprises replacing water with a filling liquid having approximately the same specific gravity as the water, placing reinforcing bars in the filling liquid, and then pouring concrete.
特徴とする特許請求の範囲第１項記載の水中鉄筋コンク
リート構造物の構築方法(2) The method for constructing an underwater reinforced concrete structure according to claim 1, wherein the filling liquid contains clay and a polymer solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16595585A JPS6229616A (en) | 1985-07-29 | 1985-07-29 | Constructing method for underwater reinforced concrete structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16595585A JPS6229616A (en) | 1985-07-29 | 1985-07-29 | Constructing method for underwater reinforced concrete structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6229616A true JPS6229616A (en) | 1987-02-07 |
| JPH0547686B2 JPH0547686B2 (en) | 1993-07-19 |
Family
ID=15822190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16595585A Granted JPS6229616A (en) | 1985-07-29 | 1985-07-29 | Constructing method for underwater reinforced concrete structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6229616A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102174814A (en) * | 2010-12-14 | 2011-09-07 | 张永忠 | Underwater concrete pouring funnel |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS491007A (en) * | 1972-04-19 | 1974-01-08 |
-
1985
- 1985-07-29 JP JP16595585A patent/JPS6229616A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS491007A (en) * | 1972-04-19 | 1974-01-08 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102174814A (en) * | 2010-12-14 | 2011-09-07 | 张永忠 | Underwater concrete pouring funnel |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0547686B2 (en) | 1993-07-19 |
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