JP2792553B2 - Breakwater caisson and method of connecting them - Google Patents
Breakwater caisson and method of connecting themInfo
- Publication number
- JP2792553B2 JP2792553B2 JP6124252A JP12425294A JP2792553B2 JP 2792553 B2 JP2792553 B2 JP 2792553B2 JP 6124252 A JP6124252 A JP 6124252A JP 12425294 A JP12425294 A JP 12425294A JP 2792553 B2 JP2792553 B2 JP 2792553B2
- Authority
- JP
- Japan
- Prior art keywords
- caisson
- steel
- breakwater
- steel material
- hole
- 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.)
- Expired - Fee Related
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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/11—Hard structures, e.g. dams, dykes or breakwaters
Landscapes
- Revetment (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は、防波堤用ケーソンおよ
びそれらの連結方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a caisson for breakwaters and a method for connecting them.
【0002】[0002]
【従来の技術】沿岸域を高潮や津波の被害から守るため
の防波堤は、コンクリート製の箱型構造物であるいわゆ
るケーソンを用いて構築されることが多い。2. Description of the Related Art Breakwaters for protecting coastal areas from damage from storm surges and tsunamis are often constructed using so-called caisson, which is a concrete box-shaped structure.
【0003】防波堤の構築にあたっては、まず、造船所
等のヤードで製作された複数のケーソンを沖合に曳航
し、次いで、これらのケーソンを沖合で順次海底に着底
させるが、近年、沿岸域の有効利用を図るべく、防波堤
の設置点がより沖合に展開されるようになってきてお
り、これに伴って、大水深、高波浪に対抗できる大型の
ケーソンが必要になり、それらの製造コストも増大して
きた。In the construction of breakwaters, first, a plurality of caissons manufactured in a yard of a shipyard or the like are towed offshore, and then these caissons are successively landed offshore. In order to make effective use, breakwaters are being installed more and more offshore, and accordingly, large caisson that can withstand deep water and high waves is required, and their manufacturing costs are also reduced. Has increased.
【0004】一方、これらの事態を解決する策として、
ケーソンを長大化させて波力の平滑化を図ることによ
り、ケーソンの断面寸法を軽減可能である旨の報告がな
されている。On the other hand, as a measure to solve these situations,
It has been reported that the cross-sectional dimension of a caisson can be reduced by increasing the length of the caisson to smooth the wave force.
【0005】すなわち、波の振幅は空間的および時間的
に位相差を伴うため、ケーソンをある程度長大化させる
ことができれば、ケーソンに作用する波力がピークとな
る時刻は、ケーソンの位置によって少しずつ遅延し、そ
の結果、ケーソン全体に作用する波力の最大値は、単位
面積当たりの波力の最大値をケーソン全体にわたって総
和した値よりも緩和される。That is, since the amplitude of a wave involves a phase difference spatially and temporally, if the caisson can be lengthened to a certain extent, the time at which the wave force acting on the caisson peaks depends on the position of the caisson little by little. As a result, the maximum value of the wave force acting on the entire caisson is relaxed from the sum of the maximum value of the wave force per unit area over the entire caisson.
【0006】かくして、波力の平滑化を利用してケーソ
ンの設計荷重を低減させ、断面寸法を小さくすることが
理論的あるいは実験的には可能となる。Thus, it is theoretically or experimentally possible to reduce the design load of the caisson by utilizing the smoothing of the wave force and to reduce the cross-sectional dimension.
【0007】[0007]
【発明が解決しようとする課題】しかしながら、製作ヤ
ードの規模、クレーンの能力および曳航・据付時の便宜
並びに曳航時の波力の影響等を考慮した場合、ケーソン
の長さは自ずと10m乃至20m程度に制限され、上述
した波圧の平滑化が可能な長大ケーソンを製作すること
は現実的には困難である。However, in consideration of the scale of the manufacturing yard, the capacity of the crane, the convenience at the time of towing / installation, the effect of wave force at the time of towing, etc., the length of the caisson is naturally about 10 to 20 m. It is practically difficult to manufacture a large caisson capable of smoothing the above-mentioned wave pressure.
【0008】そのため、ケーソンの設計荷重を低減する
ことができずに大断面のケーソンを製作することを余儀
なくされ、ケーソンの製作、曳航並びに据付コストの増
大、ひいては防波堤全体の建設費を増大させる原因とな
っていた。For this reason, the design load of the caisson cannot be reduced, so that a caisson having a large cross section has to be manufactured, which causes an increase in manufacturing, towing and installation costs of the caisson, and consequently an increase in the construction cost of the entire breakwater. Had become.
【0009】本発明は、上述した事情を考慮してなされ
たもので、製造時あるいは運搬時の問題を回避しつつ長
大化を図ることができる防波堤用ケーソンおよびそれら
の連結方法を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a breakwater caisson and a method of connecting the same, which can be made longer while avoiding problems during production or transportation. Aim.
【0010】[0010]
【課題を解決するための手段】上記目的を達成するた
め、本発明の防波堤用ケーソンは請求項1に記載したよ
うに、所定の連結用凹部を両端に形成するとともに、当
該端の一方から他方に貫通するPC鋼材用貫通孔を設け
たものである。In order to achieve the above object, a breakwater caisson according to the present invention has predetermined connecting recesses formed at both ends, and one end of the caisson is connected to the other end. And a through hole for a PC steel material penetrating therethrough.
【0011】また、本発明の防波堤用ケーソンは請求項
2に記載したように、所定の連結用凹部を一端に形成す
るとともにPC鋼材定着用空間を他端に形成し、さらに
当該端の一方から他方に貫通するPC鋼材用貫通孔を設
けたものである。In the caisson for breakwater of the present invention, a predetermined connecting concave portion is formed at one end and a space for fixing a PC steel material is formed at the other end. On the other side, a through hole for a PC steel material penetrating is provided.
【0012】また、本発明の防波堤用ケーソンは、請求
項1乃至2のいずれかに記載の連結用凹部の周囲に所定
の止水手段を設けたものである。Further, a caisson for a breakwater according to the present invention is provided with a predetermined water stopping means around the connecting concave portion according to any one of claims 1 to 2.
【0013】また、本発明の防波堤用ケーソン構造は請
求項4に記載したように、所定の連結用凹部を一端に形
成するとともにPC鋼材定着用空間を他端に形成しさら
に当該端の一方から他方に貫通するPC鋼材用貫通孔を
設けた一対の端部ケーソンを当該連結用凹部が対向する
ように隣接させ、所定のPC鋼材を前記PC鋼材用貫通
孔に挿通して前記PC鋼材定着用空間に定着したもので
ある。In the caisson structure for a breakwater according to the present invention, a predetermined connecting concave portion is formed at one end, and a space for fixing a PC steel material is formed at the other end, and further from one of the ends. A pair of end caissons having a through hole for PC steel penetrating the other side are made adjacent to each other so that the connecting recesses face each other, and a predetermined PC steel is inserted into the through hole for PC steel to fix the PC steel. It is established in space.
【0014】また、本発明の防波堤用ケーソン構造は請
求項5に記載したように、所定の連結用凹部を一端に形
成するとともにPC鋼材定着用空間を他端に形成しさら
に当該端の一方から他方に貫通するPC鋼材用貫通孔を
設けた一対の端部ケーソンと、所定の連結用凹部を両端
に形成するとともに当該端の一方から他方に貫通するP
C鋼材用貫通孔を設けた中間ケーソンとを、前記端部ケ
ーソンの連結用凹部と前記中間ケーソンの連結用凹部と
が対向するように隣接させ、所定のPC鋼材を前記端部
ケーソンのPC鋼材用貫通孔および前記中間ケーソンの
PC鋼材用貫通孔に挿通して前記PC鋼材定着用空間に
定着したものである。In the caisson structure for a breakwater according to the present invention, a predetermined connecting concave portion is formed at one end and a space for fixing a PC steel material is formed at the other end, and further, from one of the ends. A pair of end caissons having a through hole for PC steel penetrating the other side, and a predetermined connecting concave portion formed at both ends and a P penetrating from one end to the other end.
An intermediate caisson provided with a through hole for a C steel material is arranged adjacent to the connecting concave portion of the end caisson so that the connecting concave portion of the intermediate caisson faces the connecting concave portion. Through the through hole for PC steel and the through hole for PC steel of the intermediate caisson and fixed in the PC steel material fixing space.
【0015】また、本発明の防波堤用ケーソンの連結方
法は請求項6に記載したように、PC鋼材用貫通孔を設
けた複数の防波堤用ケーソンを、当該各防波堤用ケーソ
ンの少なくとも一端に形成された連結用凹部が対向する
ように配置する工程と、前記防波堤用ケーソンを所定の
止水手段を介して隣接させる工程と、前記止水手段によ
って外部からの水の浸入を防ぎつつ、前記連結用凹部に
溜まった水を抜く工程と、所定のPC鋼材を前記PC鋼
材貫通孔に挿通する工程と、前記PC鋼材にプレストレ
スを導入する工程と、前記PC鋼材を、前記複数の防波
堤用ケーソンのうち、両端に配置された2つの端部ケー
ソンに形成されたPC鋼材定着用空間に定着するととも
に、前記PC鋼材用貫通孔内にセメントグラウトを注入
する工程とを含むものである。In the method for connecting a breakwater caisson according to the present invention, a plurality of breakwater caissons provided with through holes for PC steel are formed at least at one end of each breakwater caisson. Arranging the connecting recesses so as to face each other, and adjoining the breakwater caisson via predetermined water stopping means, and preventing the water from entering from outside by the water stopping means, A step of draining water accumulated in the concave portion, a step of inserting a predetermined PC steel into the PC steel through-hole, a step of introducing a prestress to the PC steel, and a step of applying the PC steel to the plurality of caisson for breakwaters. And fixing the cement steel into the PC steel material fixing space formed in the two end caissons arranged at both ends, and injecting cement grout into the through hole for the PC steel material. Than it is.
【0016】[0016]
【作用】本発明の防波堤用ケーソンを相互に連結するに
は、まず、PC鋼材用貫通孔を設けた複数の防波堤用ケ
ーソンを、当該各防波堤用ケーソンの少なくとも一端に
形成された連結用凹部が対向するように配置する。In order to connect the breakwater caissons of the present invention to each other, first, a plurality of breakwater caissons provided with through holes for PC steel are connected to the connecting recess formed at at least one end of each of the breakwater caissons. They are arranged so as to face each other.
【0017】ここで、防波堤用ケーソンは、連結用凹部
を一端に、PC鋼材定着用空間を他端に形成した一対の
端部ケーソンのみで構成してもよいし、さらにそれらの
端部ケーソンの間に、両端に連結用凹部を形成した中間
ケーソンを介在させてもよい。Here, the caisson for breakwater may be composed of only a pair of end caissons having a connecting recess at one end and a space for fixing a PC steel material at the other end, or a caisson of these end caissons. An intermediate caisson having connection concave portions formed at both ends may be interposed therebetween.
【0018】次に、これらの防波堤用ケーソンを所定の
止水手段を介して隣接させ、当該止水手段によって水の
浸入を防ぎつつ、連結用凹部に溜まった水を抜く。Next, the caisson for breakwater is placed adjacent to the caisson via a predetermined water stopping means, and the water remaining in the connecting recess is drained while preventing water from entering by the water stopping means.
【0019】すると、防波堤用ケーソンは水圧によって
相互に密着し、連結用凹部の中にはほとんど水が浸入し
なくなる。Then, the caisson for breakwater adheres to each other due to the water pressure, and almost no water enters the connecting recess.
【0020】次に、所定のPC鋼材をPC鋼材貫通孔に
挿通し、所定のプレストレスを導入する。Next, a predetermined PC steel material is inserted into the PC steel material through hole, and a predetermined prestress is introduced.
【0021】次に、PC鋼材をPC鋼材定着用空間に定
着するとともに、PC鋼材用貫通孔内にセメントグラウ
トを注入し、防波堤用ケーソンを互いに連結する。Next, the PC steel material is fixed in the PC steel material fixing space, cement grout is injected into the PC steel material through hole, and the breakwater caissons are connected to each other.
【0022】かくして連結された防波堤用ケーソンは、
連結後は一体化して長大ケーソンとなるため、設計の際
に波圧の平滑化を導入して設計荷重を従来よりも緩和す
ることができる。The caisson for breakwater connected in this way is
After the connection, they are integrated into a long caisson, so that the design load can be reduced more than before by introducing wave pressure smoothing during design.
【0023】そのため、一体化させない場合に比べて、
ケーソンの断面寸法を大幅に低減することが可能とな
る。For this reason, compared with the case where they are not integrated,
It becomes possible to greatly reduce the cross-sectional dimension of the caisson.
【0024】[0024]
【実施例】以下、本発明の防波堤用ケーソンおよびそれ
らの連結方法の実施例について、添付図面を参照して説
明する。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view showing a caisson for a breakwater of the present invention and a method of connecting the same.
【0025】図1は、本実施例に係る防波堤用ケーソン
としての中間ケーソン1を平面図並びにA―A線および
B―B線に沿う断面図で示したものである。FIG. 1 is a plan view and a sectional view taken along lines AA and BB of an intermediate caisson 1 as a breakwater caisson according to this embodiment.
【0026】同図でわかるように、本実施例の中間ケー
ソン1は、底板2の両縁から2つの側壁3を立設し、側
壁3で挟まれた空間内に格子状の隔壁4および隔壁5を
配設してある。As can be seen from the drawing, the intermediate caisson 1 of this embodiment has two side walls 3 erected from both edges of a bottom plate 2, and a grid-shaped partition wall 4 and a partition wall are provided in a space sandwiched between the side walls 3. 5 is arranged.
【0027】ここで、最も外側の隔壁5は、底板2およ
び側壁3の端から若干内側に設けてあり、底板2、側壁
3および隔壁5で囲まれた連結用凹部としての空間6を
形成している。Here, the outermost partition wall 5 is provided slightly inside from the ends of the bottom plate 2 and the side wall 3 to form a space 6 as a connecting recess surrounded by the bottom plate 2, the side wall 3 and the partition wall 5. ing.
【0028】また、一方の連結用凹部6の周囲には止水
手段としてのゴムガスケット8を設けてある。Further, a rubber gasket 8 as a water stopping means is provided around one of the connecting concave portions 6.
【0029】ゴムガスケット8は、全体としてほぼU字
状をなすとともに底板2および側壁3の端から側方に向
けて突出させてあり、2つの中間ケーソン1をゴムガス
ケット8を設けた側と設けていない側とで連結した際、
底板2同士および側壁3同士をゴムガスケット8を介し
てぴったりと密着させ、外部の水が内側の連結用凹部6
に浸入しないようになっている。The rubber gasket 8 is substantially U-shaped as a whole and protrudes laterally from the ends of the bottom plate 2 and the side wall 3. Two intermediate caissons 1 are provided on the side where the rubber gasket 8 is provided. When connected with the other side,
The bottom plates 2 and the side walls 3 are brought into close contact with each other via a rubber gasket 8, and external water is supplied to the inner connection recess 6.
So that it does not penetrate
【0030】また、隔壁4には、PC鋼線を挿通するシ
ース管7を埋設してある。A sheath tube 7 through which a PC steel wire is inserted is embedded in the partition wall 4.
【0031】図2は、本実施例に係る防波堤用ケーソン
としての端部ケーソン11を平面図並びにC―C線に沿
う断面図で示したものである。FIG. 2 shows an end caisson 11 as a breakwater caisson according to the present embodiment in a plan view and a cross-sectional view along the line CC.
【0032】端部ケーソン11も中間ケーソン1と同
様、底板2の両縁から2つの側壁3を立設し、側壁3で
挟まれた空間内に格子状の隔壁4および隔壁5を配設し
てある。The end caisson 11 also has two side walls 3 erected from both edges of the bottom plate 2 as in the case of the intermediate caisson 1, and a grid-shaped partition wall 4 and a partition wall 5 are arranged in a space sandwiched between the side walls 3. It is.
【0033】また、最も外側の隔壁5は、底板2および
側壁3の端から若干内側に設けてあり、一端では、連結
用凹部としての空間13を、他端ではPC鋼材定着用空
間12を形成してある。The outermost partition wall 5 is provided slightly inside from the ends of the bottom plate 2 and the side wall 3, and has a space 13 as a connecting recess at one end and a space 12 for fixing a PC steel material at the other end. I have.
【0034】また、連結用凹部13の周囲には、止水手
段としてのゴムガスケット14を設けてある。A rubber gasket 14 is provided around the coupling recess 13 as a water stopping means.
【0035】ゴムガスケット14もゴムガスケット8と
同様、全体としてほぼU字状をなすとともに底板2およ
び側壁3の端から側方に向けて突出させてあり、ゴムガ
スケット14を設けた端部ケーソン11を、中間ケーソ
ン1のゴムガスケット8を設けていない側に連結した
際、底板2同士および側壁3同士をゴムガスケット14
を介してぴったりと密着させ、外部の水が内側の連結用
凹部6および連結用凹部13に浸入しないようになって
いる。The rubber gasket 14, like the rubber gasket 8, is substantially U-shaped as a whole and protrudes laterally from the ends of the bottom plate 2 and the side wall 3, and the end caisson 11 provided with the rubber gasket 14 is provided. Is connected to the side of the intermediate caisson 1 where the rubber gasket 8 is not provided, the bottom plates 2 and the side walls 3 are connected to the rubber gasket 14.
, So that external water does not enter into the inner connection concave portions 6 and 13.
【0036】また、隔壁4には、PC鋼線を挿通するシ
ース管7を埋設してある。A sheath tube 7 through which a PC steel wire is inserted is embedded in the partition wall 4.
【0037】次に、本実施例の中間ケーソン1および端
部ケーソン11、11を相互に連結して防波堤を構築す
る手順を、図3に示すフローチャートに従って以下に説
明する。Next, a procedure for constructing a breakwater by connecting the intermediate caisson 1 and the end caissons 11 and 11 of this embodiment to each other will be described below with reference to the flowchart shown in FIG.
【0038】まず、図4に示すように、中間ケーソン1
を、海底に敷設された捨石22上に先行据付された端部
ケーソン11の近傍に配置し、端部ケーソン11の一端
に形成された連結用凹部13と中間ケーソン1の一端に
形成された連結用凹部6とを対向させる(ステップ10
1)。First, as shown in FIG.
Is disposed in the vicinity of the end caisson 11 previously installed on the rubble 22 laid on the sea floor, and the connection recess 13 formed at one end of the end caisson 11 and the connection formed at one end of the intermediate caisson 1. (Step 10)
1).
【0039】なお、後述する引寄せ作業において端部ケ
ーソン11と中間ケーソン1との間に捨石22が挟まる
のを回避するため、同図に示すようにプレキャスト板等
の敷板23を予め敷いておくのがよい。In order to prevent the rubble 22 from being caught between the end caisson 11 and the intermediate caisson 1 in a drawing operation to be described later, a slab 23 such as a precast board is laid in advance as shown in FIG. Is good.
【0040】次に、図5に示すように、中間ケーソン1
をウインチ等を利用して先行据付された端部ケーソン1
1に引き寄せ、ゴムガスケット14を中間ケーソン1の
対応する位置に隣接させる(ステップ102)。Next, as shown in FIG.
End caisson 1 pre-installed using a winch etc.
1 and the rubber gasket 14 is made adjacent to the corresponding position of the intermediate caisson 1 (step 102).
【0041】この状態では、連結用凹部13および連結
用凹部6は一体の空間となり、その中に海水21が存在
している。In this state, the connecting recess 13 and the connecting recess 6 form an integrated space, in which seawater 21 is present.
【0042】なお、中間ケーソン1内に適宜注水するこ
とによって、中間ケーソン1の底板2を敷板23に適度
に接触させ、端部ケーソン11との衝突によるゴムガス
ケット14の破損を回避するのがよい。It is preferable that the bottom plate 2 of the intermediate caisson 1 be appropriately brought into contact with the bottom plate 23 by appropriately pouring water into the intermediate caisson 1 to avoid damage to the rubber gasket 14 due to collision with the end caisson 11. .
【0043】次に、図6に示すように、ゴムガスケット
14によって水の浸入を防ぎつつ、連結用凹部13およ
び連結用凹部6に溜まった海水21を抜く(ステップ1
03)。Next, as shown in FIG. 6, the seawater 21 collected in the connecting recess 13 and the connecting recess 6 is drained while preventing water from entering by the rubber gasket 14 (step 1).
03).
【0044】海水21を抜いていくと、海の水圧は、同
図の矢印で示すように、端部ケーソン11および中間ケ
ーソン1を相互に密着させる方向に作用し、かかる圧力
を受けたゴムガスケット14は、図6に示すように変形
するとともに外部からの水の浸入をほぼ完全に遮断す
る。As the seawater 21 is drawn out, the water pressure in the sea acts in the direction of bringing the end caisson 11 and the intermediate caisson 1 into close contact with each other, as indicated by the arrow in FIG. 14 deforms as shown in FIG. 6 and almost completely blocks intrusion of water from the outside.
【0045】このようにして連結用凹部13および連結
用凹部6内を完全に水抜きした後、図7に示すように、
上述と同様の手順でもう一つの端部ケーソン11を中間
ケーソン1の近傍に配置し、端部ケーソン11および中
間ケーソン1を互いに密着させる(ステップ104)。After completely draining the inside of the connecting recess 13 and the connecting recess 6 in this manner, as shown in FIG.
In the same procedure as described above, another end caisson 11 is arranged near the intermediate caisson 1, and the end caisson 11 and the intermediate caisson 1 are brought into close contact with each other (step 104).
【0046】次に、図8に示すように、PC鋼材として
のPC鋼線31をシース管7に挿通するとともに、連結
用凹部13および連結用凹部6においてカップリング3
2で結合する(ステップ105)。Next, as shown in FIG. 8, a PC steel wire 31 as a PC steel material is inserted into the sheath tube 7 and the coupling 3 is inserted into the coupling concave portions 13 and 6.
2 (step 105).
【0047】次に、PC鋼線定着用空間12に油圧ジャ
ッキを据え付け、その近傍に配置された油圧ポンプを駆
動することによって、PC鋼線31にプレストレスを導
入する(ステップ106)。Next, a prestress is introduced into the PC steel wire 31 by installing a hydraulic jack in the PC steel wire fixing space 12 and driving a hydraulic pump disposed in the vicinity thereof (step 106).
【0048】最後に、定着具33を用いてPC鋼線31
をPC鋼線定着用空間12に定着するとともに、シース
管7内にセメントグラウトを注入し、PC鋼線31に防
錆を施すとともに、PC鋼線とコンクリートとの付着を
確保する(ステップ107)。Finally, using the fixing device 33, the PC steel wire 31 is used.
Is fixed in the PC steel wire fixing space 12, cement grout is injected into the sheath pipe 7, the rust prevention is applied to the PC steel wire 31, and the adhesion between the PC steel wire and the concrete is secured (step 107). .
【0049】なお、図8では、一対の端部ケーソン1
1、11の間に中間ケーソン1をひとつだけ挟んで連結
した様子を示したが、かかる中間ケーソン1の数につい
ては、所望のケーソン長に応じて適宜増やせばよい。In FIG. 8, a pair of end caisson 1
Although the state where only one intermediate caisson 1 is interposed between 1 and 11 is shown, the number of such intermediate caissons 1 may be appropriately increased according to a desired caisson length.
【0050】かくして、端部ケーソン11、11および
所定数の中間ケーソン1を連結して一体化させ、所望の
長さの長大ケーソンが構築される。Thus, the end caissons 11 and 11 and the predetermined number of intermediate caissons 1 are connected and integrated to construct a long caisson of a desired length.
【0051】以上説明したように、本実施例の防波堤用
ケーソンおよび防波堤用ケーソンの連結方法は、一対の
端部ケーソンおよびそれらに挟まれる中間ケーソンの対
向する位置に連結用凹部を設けておき、当該連結用凹部
で端部ケーソンおよび中間ケーソンを所定の止水手段を
介して隣接させた後、当該止水手段によって外部の水の
浸入を防止しつつ連結用凹部に溜まった水を抜くことに
よって、端部ケーソンおよび中間ケーソンを密着させる
とともに、PC鋼線をPC鋼線用貫通孔に挿通してプレ
ストレスを導入し、しかるのちにPC鋼線の両端を端部
ケーソンの反対側の端に設けたPC鋼線定着用空間に定
着するようにしたので、連結部位においては、軸力、せ
ん断力並びに曲げモーメントが伝達可能な構造、特に、
波力による水平面内の曲げモーメントあるいは不同沈下
による鉛直面内の曲げモーメントに対しても強固な構造
となり、所望の数の防波堤用ケーソンを連結して一体化
を図ることができる。As described above, in the method of connecting the breakwater caisson and the breakwater caisson of the present embodiment, the connecting recesses are provided at opposing positions of the pair of end caissons and the intermediate caisson sandwiched therebetween. After the end caisson and the intermediate caisson are adjacent to each other via the predetermined water stopping means in the connection recess, by removing water accumulated in the connection recess while preventing external water from entering by the water stopping means. The end caisson and the intermediate caisson are brought into close contact with each other, and a prestress is introduced by inserting the PC steel wire into the through hole for the PC steel wire, and then both ends of the PC steel wire are connected to the opposite end of the end caisson. Since it is fixed to the provided PC steel wire fixing space, at the connection portion, a structure capable of transmitting axial force, shear force and bending moment, particularly,
The structure becomes strong against the bending moment in the horizontal plane due to the wave force or the bending moment in the vertical plane due to the differential settlement, and a desired number of breakwater caissons can be connected for integration.
【0052】すなわち、ケーソンの規模が製作や曳航等
を考慮した現実的な寸法、例えば長さ20m程度のもの
であっても、これらのケーソンを連結して一体化を図る
ことにより、例えば長さ100mの長大ケーソンを構築
することが可能となる。That is, even if the scale of the caisson is a realistic size in consideration of production, towing and the like, for example, about 20 m in length, the caisson is connected to integrate the It is possible to construct a 100 m long caisson.
【0053】したがって、ケーソンの設計段階で波圧の
平滑化を導入して設計荷重を従来よりも緩和し、断面寸
法を大幅に低減することができる。Therefore, smoothing of the wave pressure is introduced at the design stage of the caisson, so that the design load can be reduced as compared with the conventional case, and the cross-sectional dimension can be greatly reduced.
【0054】本実施例では、連結用凹部においてPC鋼
線を相互に接合するようにしたが、ケーソンの全体長に
相当する長さのPC鋼線を用いてかかる中間接合を省略
してもよい。In this embodiment, the PC steel wires are joined to each other in the connecting recess. However, such intermediate joining may be omitted by using a PC steel wire having a length corresponding to the entire length of the caisson. .
【0055】また、本実施例ではPC鋼材としてPC鋼
線を用いたが、これに代えてPC鋼より線等を用いても
よい。In the present embodiment, a PC steel wire is used as the PC steel material, but a PC steel stranded wire or the like may be used instead.
【0056】[0056]
【発明の効果】以上述べたように、本発明の防波堤用ケ
ーソンは、所定の連結用凹部を両端に形成するととも
に、当該端の一方から他方に貫通するPC鋼材用貫通孔
を設けたので、製造時あるいは運搬時の問題を回避しつ
つ長大化を図ることができる。As described above, the breakwater caisson of the present invention has the predetermined connecting recesses formed at both ends and the through holes for PC steel penetrating from one end to the other. It is possible to increase the size while avoiding problems during production or transportation.
【0057】また、本発明の防波堤用ケーソンは、所定
の連結用凹部を一端に形成するとともにPC鋼材定着用
空間を他端に形成し、さらに当該端の一方から他方に貫
通するPC鋼材用貫通孔を設けたので、製造時あるいは
運搬時の問題を回避しつつ長大化を図ることができる。Further, the caisson for breakwater of the present invention has a predetermined connecting recess at one end, a space for fixing PC steel at the other end, and a penetrating PC steel material penetrating from one end to the other. Since the holes are provided, the size can be increased while avoiding problems during production or transportation.
【0058】また、本発明の防波堤用ケーソン構造は、
所定の連結用凹部を一端に形成するとともにPC鋼材定
着用空間を他端に形成しさらに当該端の一方から他方に
貫通するPC鋼材用貫通孔を設けた一対の端部ケーソン
を当該連結用凹部が対向するように配置し、所定のPC
鋼材を前記PC鋼材用貫通孔に挿通して前記PC鋼材定
着用空間に定着したので、製造時あるいは運搬時の問題
を回避しつつ長大化を図ることができる。The caisson structure for a breakwater of the present invention
A pair of end caissons having a predetermined connecting recess formed at one end, a PC steel fixing space formed at the other end, and a PC steel through hole penetrating from one end to the other of the end are provided. Are arranged to face each other and the PC
Since the steel material is inserted into the PC steel material through-hole and fixed in the PC steel material fixing space, the size can be increased while avoiding problems during production or transportation.
【0059】また、本発明の防波堤用ケーソン構造は、
所定の連結用凹部を一端に形成するとともにPC鋼材定
着用空間を他端に形成しさらに当該端の一方から他方に
貫通するPC鋼材用貫通孔を設けた一対の端部ケーソン
と、所定の連結用凹部を両端に形成するとともに当該端
の一方から他方に貫通するPC鋼材用貫通孔を設けた中
間ケーソンとを、前記端部ケーソンの連結用凹部と前記
中間ケーソンの連結用凹部とが対向するように配置し、
所定のPC鋼材を前記端部ケーソンのPC鋼材用貫通孔
および前記中間ケーソンのPC鋼材用貫通孔に挿通して
前記PC鋼材定着用空間に定着したので、製造時あるい
は運搬時の問題を回避しつつ長大化を図ることができ
る。The caisson structure for a breakwater of the present invention
A pair of end caissons having a predetermined connecting recess formed at one end, a space for fixing the PC steel at the other end, and a through hole for the PC steel penetrating from one end to the other of the end; An intermediate caisson provided with a PC steel material through-hole formed at both ends and penetrating from one end of the end to the other is opposed to the connecting concave portion of the end caisson and the connecting concave portion of the intermediate caisson. So that
Since a predetermined PC steel material is inserted into the PC steel material through-hole of the end caisson and the PC steel material through-hole of the intermediate caisson and is fixed in the PC steel material fixing space, problems during production or transportation can be avoided. In addition, the length can be increased.
【0060】また、本発明の防波堤用ケーソンの連結方
法は、PC鋼材用貫通孔を設けた複数の防波堤用ケーソ
ンを、当該各防波堤用ケーソンの少なくとも一端に形成
された連結用凹部が対向するように配置する工程と、前
記防波堤用ケーソンを所定の止水手段を介して隣接させ
る工程と、前記止水手段によって外部からの水の浸入を
防ぎつつ、前記連結用凹部に溜まった水を抜く工程と、
所定のPC鋼材を前記PC鋼材貫通孔に挿通する工程
と、前記PC鋼材にプレストレスを導入する工程と、前
記PC鋼材を、前記複数の防波堤用ケーソンのうち、両
端に配置された2つの端部ケーソンに形成されたPC鋼
材定着用空間に定着するとともに、前記PC鋼材用貫通
孔内にセメントグラウトを注入する工程とを含むので、
製造時あるいは運搬時の問題を回避しつつ長大化を図る
ことができる。Further, in the method of connecting a breakwater caisson according to the present invention, a plurality of breakwater caissons provided with through holes for PC steel are connected to the connecting recess formed at at least one end of each breakwater caisson. Arranging the breakwater caisson via predetermined water stopping means, and draining water accumulated in the connection recess while preventing water from entering from outside by the water stopping means. When,
A step of inserting a predetermined PC steel material into the PC steel material through hole, a step of introducing a prestress into the PC steel material, and a step of applying the PC steel material to two ends of the plurality of breakwater caissons arranged at both ends. Fixing in the PC steel material fixing space formed in the part caisson, and injecting cement grout into the PC steel material through hole.
It is possible to increase the size while avoiding problems during production or transportation.
【0061】[0061]
【図1】(a)は本実施例に係る中間ケーソンの平面図、
(b)は(a) のA―A線に沿う側面図、(c)は(a)のB―B
線に沿う断面図。FIG. 1A is a plan view of an intermediate caisson according to the present embodiment,
(b) is a side view along line AA of (a), (c) is BB of (a)
Sectional view along the line.
【図2】(a)は本実施例に係る端部ケーソンの平面図、
(b)は(a) のC―C線に沿う側面図。FIG. 2A is a plan view of an end caisson according to the present embodiment,
(b) is a side view along the line CC of (a).
【図3】本実施例に係る防波堤用ケーソンの連結方法の
手順を示すフローチャート。FIG. 3 is a flowchart illustrating a procedure of a method of connecting a breakwater caisson according to the present embodiment.
【図4】(a) は端部ケーソンおよび中間ケーソンを、連
結用凹部が対向するように配置した様子を示す平面図、
(b)は(a)のD―D線に沿う断面図。FIG. 4 (a) is a plan view showing a state in which an end caisson and an intermediate caisson are arranged such that connection concave portions face each other;
(b) is sectional drawing which follows the DD line of (a).
【図5】(a) は中間ケーソンを端部ケーソンに引き寄せ
て隣接させた様子を示す平面図、(b)は(a)のE―E線に
沿う断面図。5A is a plan view showing a state in which an intermediate caisson is drawn to and adjacent to an end caisson, and FIG. 5B is a cross-sectional view taken along line EE in FIG. 5A.
【図6】(a) は連結用凹部に溜まった水を抜いて中間ケ
ーソンを端部ケーソンに密着させた様子を示す平面図、
(b)は(a)のF―F線に沿う断面図。FIG. 6 (a) is a plan view showing a state in which water accumulated in a connecting recess is drained and an intermediate caisson is brought into close contact with an end caisson;
(b) is a sectional view taken along line FF of (a).
【図7】(a) は一対の端部ケーソンの間に中間ケーソン
を挟んで密着させた様子を示す平面図、(b)は(a)のG―
G線に沿う断面図。FIG. 7 (a) is a plan view showing a state in which an intermediate caisson is sandwiched between a pair of end caissons and closely attached to each other, and FIG.
Sectional drawing along G line.
【図8】(a) は一対の端部ケーソンの間に中間ケーソン
を挟んでPC鋼線で連結させた様子を示す平面図、(b)
は(a)のH―H線に沿う断面図。FIG. 8A is a plan view showing a state in which an intermediate caisson is sandwiched between a pair of end caissons and connected by a PC steel wire, and FIG.
3A is a cross-sectional view along the line HH in FIG.
1 防波堤用ケーソン(中間ケーソン) 6、13 連結用凹部 7 PC鋼線用シース管(PC鋼材用貫通孔) 8 ゴムガスケット(止水手段) 11 防波堤用ケーソン(端部ケーソン) 12 PC鋼線定着用空間(PC鋼材定着用空
間) 31 PC鋼線(PC鋼材) 32 カップリング 33 定着具 101 配置工程 102 隣接工程 103 密着工程 105 PC鋼線挿通工程 106 プレストレス導入工程 107 PC鋼線定着工程DESCRIPTION OF SYMBOLS 1 Breakwater caisson (intermediate caisson) 6, 13 Connecting recess 7 PC steel wire sheath tube (PC steel through hole) 8 Rubber gasket (water stopping means) 11 Breakwater caisson (end caisson) 12 PC steel wire anchoring Space for PC steel fixing space 31 PC steel wire (PC steel) 32 Coupling 33 Fixing tool 101 Arrangement process 102 Adjacent process 103 Adhesion process 105 PC steel wire insertion process 106 Prestress introduction process 107 PC steel wire fixing process
Claims (6)
もに、当該端の一方から他方に貫通するPC鋼材用貫通
孔を設けたことを特徴とする防波堤用ケーソン。1. A caisson for a breakwater, wherein a predetermined concave portion for connection is formed at both ends, and a through hole for a PC steel penetrating from one of the ends to the other is provided.
もにPC鋼材定着用空間を他端に形成し、さらに当該端
の一方から他方に貫通するPC鋼材用貫通孔を設けたこ
とを特徴とする防波堤用ケーソン。2. A PC steel material fixing space is formed at one end, a PC steel material fixing space is formed at the other end, and a PC steel material through hole penetrating from one end to the other end is provided. Breakwater caisson.
を設けた請求項1乃至2のいずれかに記載の防波堤用ケ
ーソン。3. The breakwater caisson according to claim 1, wherein a predetermined water stopping means is provided around the connection recess.
もにPC鋼材定着用空間を他端に形成しさらに当該端の
一方から他方に貫通するPC鋼材用貫通孔を設けた一対
の端部ケーソンを当該連結用凹部が対向するように配置
し、所定のPC鋼材を前記PC鋼材用貫通孔に挿通して
前記PC鋼材定着用空間に定着したことを特徴とする防
波堤用ケーソン構造。4. A pair of end caissons having a predetermined connecting recess formed at one end, a space for fixing a PC steel material formed at the other end, and a through hole for a PC steel material penetrating from one end to the other end. A caisson structure for a breakwater, wherein a predetermined PC steel material is inserted through the through hole for the PC steel material and is fixed in the space for fixing the PC steel material.
もにPC鋼材定着用空間を他端に形成しさらに当該端の
一方から他方に貫通するPC鋼材用貫通孔を設けた一対
の端部ケーソンと、所定の連結用凹部を両端に形成する
とともに当該端の一方から他方に貫通するPC鋼材用貫
通孔を設けた中間ケーソンとを、前記端部ケーソンの連
結用凹部と前記中間ケーソンの連結用凹部とが対向する
ように配置し、所定のPC鋼材を前記端部ケーソンのP
C鋼材用貫通孔および前記中間ケーソンのPC鋼材用貫
通孔に挿通して前記PC鋼材定着用空間に定着したこと
を特徴とする防波堤用ケーソン構造。5. A pair of end caissons having a predetermined connecting recess at one end, a space for fixing a PC steel at the other end, and a through hole for a PC steel penetrating from one end to the other of the ends. And an intermediate caisson formed with a predetermined connecting recess at both ends and having a through hole for PC steel penetrating from one end to the other of the end, and connecting the connecting recess of the end caisson and the intermediate caisson. It is arranged so that the recessed part faces, and a predetermined PC steel material is
A caisson structure for a breakwater, wherein the caisson structure for a breakwater is inserted into a through hole for a C steel material and a through hole for a PC steel material of the intermediate caisson and fixed in the PC steel material fixing space.
用ケーソンを、当該各防波堤用ケーソンの少なくとも一
端に形成された連結用凹部が対向するように配置する工
程と、 前記防波堤用ケーソンを所定の止水手段を介して隣接さ
せる工程と、 前記止水手段によって外部からの水の浸入を防ぎつつ、
前記連結用凹部に溜まった水を抜く工程と、 所定のPC鋼材を前記PC鋼材貫通孔に挿通する工程
と、 前記PC鋼材にプレストレスを導入する工程と、 前記PC鋼材を、前記複数の防波堤用ケーソンのうち、
両端に配置された2つの端部ケーソンに形成されたPC
鋼材定着用空間に定着するとともに、前記PC鋼材用貫
通孔内にセメントグラウトを注入する工程とを含むこと
を特徴とする防波堤用ケーソンの連結方法。6. A step of arranging a plurality of breakwater caissons provided with through holes for PC steel so that connection concave portions formed at least at one end of each breakwater caisson are opposed to each other. A step of adjoining via a predetermined water stopping means, while preventing water from entering from outside by the water stopping means,
A step of draining water accumulated in the connecting recess; a step of inserting a predetermined PC steel into the PC steel through-hole; a step of introducing prestress into the PC steel; and a step of applying the PC steel to the plurality of breakwaters. For caisson
PC formed in two end caissons arranged at both ends
A step of injecting cement grout into the through hole for PC steel while fixing the steel in the steel material fixing space, and connecting the caisson for breakwater.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6124252A JP2792553B2 (en) | 1994-05-13 | 1994-05-13 | Breakwater caisson and method of connecting them |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6124252A JP2792553B2 (en) | 1994-05-13 | 1994-05-13 | Breakwater caisson and method of connecting them |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH07305318A JPH07305318A (en) | 1995-11-21 |
JP2792553B2 true JP2792553B2 (en) | 1998-09-03 |
Family
ID=14880734
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JP6124252A Expired - Fee Related JP2792553B2 (en) | 1994-05-13 | 1994-05-13 | Breakwater caisson and method of connecting them |
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JP (1) | JP2792553B2 (en) |
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US10640940B2 (en) | 2017-12-04 | 2020-05-05 | Phillip M. DeLaine, Jr. | Systems and methods for forming water barriers |
-
1994
- 1994-05-13 JP JP6124252A patent/JP2792553B2/en not_active Expired - Fee Related
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JPH07305318A (en) | 1995-11-21 |
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