JPH10147921A - Structure of caisson breakwater and its construction method - Google Patents
Structure of caisson breakwater and its construction methodInfo
- Publication number
- JPH10147921A JPH10147921A JP8322219A JP32221996A JPH10147921A JP H10147921 A JPH10147921 A JP H10147921A JP 8322219 A JP8322219 A JP 8322219A JP 32221996 A JP32221996 A JP 32221996A JP H10147921 A JPH10147921 A JP H10147921A
- Authority
- JP
- Japan
- Prior art keywords
- caisson
- rubble mound
- breakwater
- legs
- mound
- 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.)
- Pending
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)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ケ−ソン防波堤の
構造及び構築方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure and construction method of a caisson breakwater.
【０００２】[0002]
【発明が解決しようとする課題】ケ−ソンを沈設して防
波堤を構築するに当たっては、ケ−ソンの滑動抵抗対策
が重要となる。従来は、ケ−ソンの重量を増して滑動抵
抗を増加させる方法があるが、断面が大きくなるためコ
ストが高くなる。また、ケ−ソン底面と捨石マウンドと
の間にアスファルトマットを敷設する方法もあるが、コ
ストが高い割りには、摩擦係数はマット無しの０．６か
ら０．８〜１．０程度にしか増加せず、効果的な滑動防
止対策とは言い難い。In constructing a breakwater by laying a casing, it is important to take measures against the sliding resistance of the casing. Conventionally, there is a method of increasing the sliding resistance by increasing the weight of the casing, but the cost increases because the cross section becomes large. There is also a method of laying an asphalt mat between the bottom of the caisson and the rubble mound. However, the cost is high, but the coefficient of friction is only 0.6 to 0.8 to 1.0 with no mat. It does not increase, and is not an effective slip prevention measure.
【０００３】[0003]
【発明の目的】本発明は、上記のような問題点を解決す
るためになされたもので、低コストで効果的な滑動防止
が可能なケ−ソン防波堤の構造及び構築方法を提供する
ことを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a structure and a method for constructing a caisson breakwater which can effectively prevent slippage at low cost. Aim.
【０００４】[0004]
【課題を解決するための手段】上記課題を解決するため
の手段として、本発明は請求項１として、水中に築造し
た捨石マウンド上にケ−ソンを設置して構成する防波堤
の構造において、ケ−ソンの底面に設けた脚を、捨石マ
ウンド内に位置させて構成することを特徴とした、ケ−
ソン防波堤の構造を提供する。Means for Solving the Problems As means for solving the above-mentioned problems, the present invention provides, as a first aspect, a structure of a breakwater constructed by installing a cason on a rubble mound constructed underwater. -A case characterized in that the legs provided on the bottom of the son are positioned in the rubble mound,
Provides the structure of Son Breakwater.
【０００５】請求項２として、水中に築造した捨石マウ
ンド上にケ−ソンを設置して構成する防波堤の構造にお
いて、前記捨石マウンド内に函体を設置しておき、ケ−
ソンの底面に設けた脚を、前記函体内に挿入して構成す
ることを特徴とした、ケ−ソン防波堤の構造を提供す
る。According to a second aspect of the present invention, in a breakwater structure in which a caisson is installed on a rubble mound constructed underwater, a box is installed in the rubble mound.
A cason breakwater structure is provided, wherein a leg provided on the bottom of the son is inserted into the box.
【０００６】請求項３として、請求項１又は２に記載の
ケ−ソン防波堤の構造において、前記ケ−ソンの脚の周
囲に発生する空隙に水中コンクリ−トを充填して構成し
たことを特徴とした、ケ−ソン防波堤の構造を提供す
る。According to a third aspect of the present invention, in the structure of the caisson breakwater according to the first or second aspect, a gap formed around the leg of the caisson is filled with underwater concrete. The structure of the Kason breakwater is provided.
【０００７】請求項４として、水中に築造した捨石マウ
ンド上にケ−ソンを設置して構成する防波堤の構築方法
において、前記捨石マウンド内に、上面に蓋体を取り付
けた函体を設置しておき、ケ−ソンの底面に設けた脚
を、前記蓋体を破壊して前記函体内に挿入して構成する
ことを特徴としたケ−ソン防波堤の構築方法を提供す
る。According to a fourth aspect of the present invention, there is provided a method for constructing a breakwater comprising a caisson installed on a rubble mound constructed underwater, wherein a box having a lid attached to an upper surface is installed in the rubble mound. A method of constructing a caisson breakwater, characterized in that legs provided on the bottom surface of a caisson are constructed by breaking the lid and inserting the same into the box.
【０００８】請求項５として、水中に築造した捨石マウ
ンド上にケ−ソンを設置して構成する防波堤の構造にお
いて、水中に築造した下部捨石マウンドと、底面に設け
た脚を前記下部捨石マウンド上に位置させて設置したケ
−ソンと、前記脚を埋没させて前記下部捨石マウンド上
に築造した上部捨石マウンドとより構成したことを特徴
とした、ケ−ソン防波堤の構造を提供する。According to a fifth aspect of the present invention, in the structure of a breakwater comprising a caisson installed on a rubble mound constructed underwater, a lower rubble mound constructed underwater and a leg provided on a bottom surface are provided on the lower rubble mound. And an upper rubble mound constructed on the lower rubble mound by burying the legs, and a caisson breakwater structure is provided.
【０００９】請求項６として、水中に築造した捨石マウ
ンド上にケ−ソンを設置して構成する防波堤の構築方法
において、水中に下部捨石マウンドを築造し、底面に設
けた脚を前記下部捨石マウンド上に位置させてケ−ソン
を設置し、前記下部捨石マウンド上に捨石を充填して上
部捨石マウンドを築造し、前記脚を上部捨石マウンド内
に埋没させることを特徴とした、ケ−ソン防波堤の構築
方法を提供する。According to a sixth aspect of the present invention, there is provided a method for constructing a breakwater comprising a caisson installed on a rubble mound constructed underwater, wherein a lower rubble mound is constructed underwater, and a leg provided on a bottom surface is provided with the lower rubble mound. A caisson breakwater, characterized in that a caisson is placed on the upper side, a rubble is filled on the lower rubble mound, an upper rubble mound is built, and the legs are buried in the upper rubble mound. Provides a construction method for
【００１０】請求項７として、請求項６に記載のケ−ソ
ン防波堤の構築方法において、前記上部捨石マウンド
は、ケ−ソン内部からケ−ソン底版に設けた開孔部を介
して充填し、充填終了後には前記開孔部を水中コンクリ
−トで閉塞することを特徴とした、ケ−ソン防波堤の構
築方法を提供する。According to a seventh aspect of the present invention, in the method for constructing a caisson breakwater according to the sixth aspect, the upper rubble mound is filled from the inside of the caisson through an opening provided in the cason bottom slab. The present invention provides a method for constructing a caisson breakwater, characterized in that the opening is closed with an underwater concrete after completion of filling.
【００１１】[0011]
【発明の実施の形態１】図１〜４を参照して、発明の実
施の形態１について説明する。 ＜イ＞函体 函体１は、図２に示すように、円筒状あるいは角柱状等
の中空体である。鋼管または塩ビ管等で形成し、函体１
の周囲から捨石マウンドの側圧が作用しても変形しない
よう、十分な剛性を付与する。First Embodiment A first embodiment of the present invention will be described with reference to FIGS. <B> Box As shown in FIG. 2, the box 1 is a hollow body such as a cylinder or a prism. Formed of steel pipe or PVC pipe,
Sufficient stiffness is provided so that it will not be deformed even if the side pressure of the rubble mound acts from around.
【００１２】また、函体１の上端には蓋体１１を設け
る。この蓋体１１は、周囲に積層させた捨石マウンドか
ら捨石が落下する程度では破壊されないが、ケ−ソン着
定時にケ−ソン自重による集中荷重が作用した際には破
壊される程度の強度を付与する。例えばプラスチックな
どで作製する。A lid 11 is provided at the upper end of the box 1. The lid 11 is not destroyed by the amount of rubble falling from the rubble mound stacked around it, but has such strength that it is destroyed when a concentrated load due to its own weight is applied at the time of caisson setting. Give. For example, it is made of plastic or the like.
【００１３】＜ロ＞函体の設置 函体１の設置方法は、例えば図２に示すように、鋼製定
規２に吊り索２１により吊り下げて、作業船より水中の
所定位置に吊り下ろして設置する。設置数は、ケ−ソン
の規模や函体１の形状に合わせて適宜選択する。なお、
函体１は海底面に直接設置してもよいし、低く敷きなら
したマウンド上に設置してもよい。<B> Installation of Box The installation method of the box 1 is, for example, as shown in FIG. 2, suspended on a steel ruler 2 by a hanging cable 21 and suspended from a work boat at a predetermined position in water. Install. The number of installations is appropriately selected according to the scale of the casing and the shape of the box 1. In addition,
The housing 1 may be installed directly on the sea floor or on a mound laid low.
【００１４】＜ハ＞捨石マウンドの築造 図３に示すように、函体１の周囲に、函体１の上端部付
近まで捨石を積層させて捨石マウンド３を築造する。こ
のとき、函体１には蓋体１１が設けてあるため、捨石が
函体１内に落下するのを防止できる。<C> Construction of rubble mound As shown in FIG. 3, rubble mound 3 is constructed by stacking rubble around the box 1 to the vicinity of the upper end of the box 1. At this time, since the lid 1 is provided on the box 1, it is possible to prevent the rubble from falling into the box 1.
【００１５】＜ニ＞ケ−ソンの構造 図１に示すように、ケ−ソン４の底面には、補強したコ
ンクリ−ト製や鋼管製等の脚４１を突設する。この脚４
１の数及び設置位置は、函体１の埋設数および埋設位置
に対応させて設けてある。また脚４１の水平断面外形
は、函体１内に挿入できる形状及び寸法とする。さら
に、脚４１の縦の長さは、ケ−ソン４の底面が捨石マウ
ンド３上面に定着するのを妨げないため、函体１の深さ
とほぼ同一かそれより短く形成する。<4> Structure of Casson As shown in FIG. 1, legs 41 made of reinforced concrete or steel pipe are projected from the bottom of the casing 4. This leg 4
The number and the installation position of 1 are provided corresponding to the number and the installation position of the boxes 1. The horizontal cross-sectional outer shape of the leg 41 has a shape and dimensions that can be inserted into the box 1. Further, the vertical length of the legs 41 is formed to be substantially the same as or shorter than the depth of the box 1 in order not to prevent the bottom surface of the casing 4 from being fixed to the upper surface of the rubble mound 3.
【００１６】＜ホ＞ケ−ソンの着定 図４に示すように、曳航してきたケ−ソン４を捨石マウ
ンド３上に沈降させ、脚４１により蓋体１１を突き破っ
て函体１内に挿入し、図１に示すようにケ−ソン４の底
面を捨石マウンド３の上面に定着させる。そして、脚４
１と函体１との間に発生する空隙に水中コンクリ−トを
充填し、脚４１を捨石マウンド３に強固に固定する。水
中コンクリ−トの充填は、予め脚４１に取り付けたトレ
ミ−管等によって行う。なお、捨石マウンド内に脚を挿
入する空間を設けることができれば、函体を用いなくて
もよい。<E> Settling of Casson As shown in FIG. 4, the towed cason 4 is settled on the rubble mound 3, and the lid 11 is pierced by the legs 41 and inserted into the box 1. Then, the bottom surface of the casing 4 is fixed to the upper surface of the rubble mound 3 as shown in FIG. And leg 4
An underwater concrete is filled in a gap formed between the box 1 and the box 1, and the leg 41 is firmly fixed to the rubble mound 3. The filling of the underwater concrete is performed by a tremee tube or the like attached to the leg 41 in advance. If a space for inserting the legs can be provided in the rubble mound, the case may not be used.
【００１７】[0017]
【発明の実施の形態２】次に、図５〜８を参照して、発
明の実施の形態２について説明する。 ＜イ＞下部捨石マウンドの築造 先ず、図５に示すように、海底に下部捨石マウンド５を
築造する。この下部捨石マウンド５の厚さは、築造予定
の捨石マウンド全体の厚さから、ケ−ソンの脚の安定に
必要な長さを引いた厚さとほぼ等しいものとする。Second Embodiment Next, a second embodiment of the invention will be described with reference to FIGS. <A> Construction of lower rubble mound First, as shown in FIG. 5, a lower rubble mound 5 is constructed on the sea floor. The thickness of the lower rubble mound 5 is substantially equal to the total thickness of the rubble mound to be built minus the length necessary for stabilizing the legs of the casing.
【００１８】＜ロ＞ケ−ソンの着定 図６に示すように、ケ−ソン６の底面に脚６１を所要数
設け、この脚６１を下部捨石マウンド５上に位置させて
ケ−ソンを設置する。この場合、脚６１は、上記実施の
形態１のように函体との関係を考える必要がない。<B> Mounting of the Casson As shown in FIG. 6, a required number of legs 61 are provided on the bottom surface of the casing 6, and these legs 61 are positioned on the lower rubble mound 5 to mount the casing. Install. In this case, there is no need to consider the relationship between the leg 61 and the box as in the first embodiment.
【００１９】＜ハ＞上部捨石マウンドの築造 図７、８に示すように、下部捨石マウンド５上の脚６１
の周囲に捨石を充填して、上部捨石マウンド５１を築造
する。捨石の充填は、ホッパ−７及びシュ−ト７１をケ
−ソン６内に搬入し、シュ−ト７１をケ−ソン底版６２
の開孔部６３より下方に貫通させ、主にケ−ソン６下方
の中央部に充填する。並行してケ−ソン６の外部より、
ホッパ−８とシュ−ト８１を用いて、主にケ−ソン６下
方の周縁部に充填する。<C> Construction of upper rubble mound As shown in FIGS.
Is filled with rubble to build an upper rubble mound 51. To fill the rubble, the hopper 7 and the shoe 71 are carried into the casing 6, and the shoe 71 is moved to the casing bottom plate 62.
And is filled mainly in the central portion below the casing 6. At the same time, from outside of Cason 6,
Using the hopper 8 and the shoe 81, the peripheral portion below the casing 6 is mainly filled.
【００２０】＜ニ＞ケ−ソンの着定 図７に示すように、ケ−ソン６の底面に到達するまで捨
石を充填して、上部捨石マウンド５１を築造する。これ
によって、ケ−ソン６の自重をその底面を介して上部捨
石マウンド５１の上面に伝達でき、ケ−ソン６の着定が
完了する。着定後、ケ−ソン底版６２に設けた開孔部６
３を水中コンクリ−トで閉塞して施工を終了する。<4> Setting of Casson As shown in FIG. 7, rubble is filled until the bottom of the caisson 6 is reached, and an upper rubble mound 51 is constructed. As a result, the weight of the casing 6 can be transmitted to the upper surface of the upper rubble mound 51 via the bottom face thereof, and the setting of the casing 6 is completed. After setting, the opening 6 provided in the casing bottom plate 62
3 is closed with an underwater concrete to complete the construction.
【００２１】[0021]
【作用】上記のように構成することによって、波力や地
震力などの水平力に対して、捨石マウンド上面とケ−ソ
ン底面との間に働く摩擦抵抗力に加えて、捨石マウンド
内に埋設された脚が剪断キ−の役目を果たすため、滑動
抵抗力がよりいっそう増大すると共に、転倒モ−メント
に対する抵抗力も増大する。[Function] By being constructed as described above, in addition to the frictional force acting between the top of the rubble mound and the bottom of the caisson against horizontal forces such as wave force and seismic force, it is embedded in the rubble mound. Since the leg provided serves as a shearing key, the sliding resistance is further increased, and the resistance to the falling moment is also increased.
【００２２】[0022]
【発明の効果】本発明は以上説明したようになるため、
次のような効果を得ることができる。 ＜イ＞捨石マウンド内に埋設された脚が剪断キ−の役目
を果たすため、滑動抵抗力がよりいっそう増大すると共
に、転倒モ−メントに対する抵抗力も増大する。Since the present invention has been described above,
The following effects can be obtained. <A> Since the legs embedded in the rubble mound serve as a shearing key, the sliding resistance is further increased, and the resistance to the falling moment is also increased.
【００２３】＜ロ＞ケ−ソンの重量を増やす必要がな
く、断面が小さくて済むため、コストの低減を図ること
ができる。<B> It is not necessary to increase the weight of the casing, and the cross section can be made small, so that the cost can be reduced.
【図１】 発明の実施の形態１の説明図FIG. 1 is an explanatory diagram of Embodiment 1 of the present invention.
【図２】 発明の実施の形態１の説明図FIG. 2 is an explanatory view of Embodiment 1 of the present invention.
【図３】 発明の実施の形態１の説明図FIG. 3 is an explanatory view of the first embodiment of the present invention.
【図４】 発明の実施の形態１の説明図FIG. 4 is an explanatory diagram of Embodiment 1 of the present invention.
【図５】 発明の実施の形態２の説明図FIG. 5 is an explanatory view of Embodiment 2 of the present invention.
【図６】 発明の実施の形態２の説明図FIG. 6 is an explanatory view of Embodiment 2 of the present invention.
【図７】 発明の実施の形態２の説明図FIG. 7 is an explanatory view of Embodiment 2 of the present invention.
【図８】 発明の実施の形態２の説明図FIG. 8 is an explanatory view of Embodiment 2 of the present invention.
Claims (7)
ンを設置して構成する防波堤の構造において、 ケ−ソンの底面に設けた脚を、 捨石マウンド内に位置させて構成することを特徴とし
た、 ケ−ソン防波堤の構造。1. A breakwater structure in which a caisson is installed on a rubble mound constructed underwater, wherein legs provided on the bottom surface of the caisson are located in the rubble mound. The structure of the Caesson breakwater.
ンを設置して構成する防波堤の構造において、 前記捨石マウンド内に函体を設置しておき、 ケ−ソンの底面に設けた脚を、 前記函体内に挿入して構成することを特徴とした、 ケ−ソン防波堤の構造。2. A breakwater structure in which a caisson is installed on a rubble mound built in water, wherein a box is installed in the rubble mound, and legs provided on the bottom of the caisson are provided. A structure of a Caesson breakwater, wherein the structure is inserted into the box and configured.
の構造において、前記ケ−ソンの脚の周囲に発生する空
隙に水中コンクリ−トを充填して構成したことを特徴と
した、ケ−ソン防波堤の構造。3. The structure of a caisson breakwater according to claim 1, wherein an underwater concrete is filled in a void formed around a leg of the caisson. The structure of the Caesson breakwater.
ンを設置して構成する防波堤の構築方法において、 前記捨石マウンド内に、上面に蓋体を取り付けた函体を
設置しておき、 ケ−ソンの底面に設けた脚を、 前記蓋体を破壊して前記函体内に挿入して構成すること
を特徴とした、 ケ−ソン防波堤の構築方法。4. A method of constructing a breakwater comprising a caisson installed on a rubble mound constructed underwater, wherein a box with a lid attached to an upper surface is installed in the rubble mound. -A method for constructing a caisson breakwater, characterized in that legs provided on the bottom surface of the son are constructed by breaking the lid and inserting the legs into the box.
ンを設置して構成する防波堤の構造において、 水中に築造した下部捨石マウンドと、 底面に設けた脚を前記下部捨石マウンド上に位置させて
設置したケ−ソンと、 前記脚を埋没させて前記下部捨石マウンド上に築造した
上部捨石マウンドとより構成したことを特徴とした、 ケ−ソン防波堤の構造。5. A breakwater structure constructed by installing a caisson on a rubble mound built in water, wherein a lower rubble mound built in water and a leg provided on a bottom surface are positioned on the lower rubble mound. A caisson breakwater, comprising: a caisson installed at a height; and an upper rubble mound constructed on the lower rubble mound by burying the legs.
ンを設置して構成する防波堤の構築方法において、 水中に下部捨石マウンドを築造し、 底面に設けた脚を前記下部捨石マウンド上に位置させて
ケ−ソンを設置し、 前記下部捨石マウンド上に捨石を充填して上部捨石マウ
ンドを築造し、前記脚を上部捨石マウンド内に埋没させ
ることを特徴とした、 ケ−ソン防波堤の構築方法。6. A method for constructing a breakwater comprising a caisson installed on a rubble mound built in water, wherein a lower rubble mound is built in water, and a leg provided on a bottom surface is positioned on the lower rubble mound. A method of constructing a caisson breakwater, comprising: installing a caisson, filling the lower rubble mound with rubble, building an upper rubble mound, and burying the legs in the upper rubble mound. .
方法において、前記上部捨石マウンドは、ケ−ソン内部
からケ−ソン底版に設けた開孔部を介して充填し、充填
終了後には前記開孔部を水中コンクリ−トで閉塞するこ
とを特徴とした、ケ−ソン防波堤の構築方法。7. The method for constructing a caisson breakwater according to claim 6, wherein the upper rubble mound is filled from the inside of the caisson through an opening provided in a casing bottom plate, and after the filling is completed. A method of constructing a caisson breakwater, characterized in that the opening is closed with an underwater concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8322219A JPH10147921A (en) | 1996-11-18 | 1996-11-18 | Structure of caisson breakwater and its construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8322219A JPH10147921A (en) | 1996-11-18 | 1996-11-18 | Structure of caisson breakwater and its construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10147921A true JPH10147921A (en) | 1998-06-02 |
Family
ID=18141282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8322219A Pending JPH10147921A (en) | 1996-11-18 | 1996-11-18 | Structure of caisson breakwater and its construction method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10147921A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL2001034C2 (en) * | 2006-11-27 | 2008-09-08 | Tebezo Waterbouw B V | Groyne for protecting bank of tidal river, comprises sloping bank with spaced apart gabions on top of its crown |
| CN112031014A (en) * | 2020-08-17 | 2020-12-04 | 浙江舜杰建筑集团股份有限公司 | Caisson and pile combined foundation for reinforcing foundation and construction method thereof |
-
1996
- 1996-11-18 JP JP8322219A patent/JPH10147921A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL2001034C2 (en) * | 2006-11-27 | 2008-09-08 | Tebezo Waterbouw B V | Groyne for protecting bank of tidal river, comprises sloping bank with spaced apart gabions on top of its crown |
| CN112031014A (en) * | 2020-08-17 | 2020-12-04 | 浙江舜杰建筑集团股份有限公司 | Caisson and pile combined foundation for reinforcing foundation and construction method thereof |
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