JPH03262828A - Construction method for stabilizing marine structure - Google Patents
Construction method for stabilizing marine structureInfo
- Publication number
- JPH03262828A JPH03262828A JP6092990A JP6092990A JPH03262828A JP H03262828 A JPH03262828 A JP H03262828A JP 6092990 A JP6092990 A JP 6092990A JP 6092990 A JP6092990 A JP 6092990A JP H03262828 A JPH03262828 A JP H03262828A
- Authority
- JP
- Japan
- Prior art keywords
- rubble
- net
- nets
- mound
- constructed
- 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
- 230000000087 stabilizing effect Effects 0.000 title claims description 9
- 238000010276 construction Methods 0.000 title description 7
- 230000002093 peripheral effect Effects 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 9
- 230000006641 stabilisation Effects 0.000 claims 1
- 238000011105 stabilization Methods 0.000 claims 1
- 230000002265 prevention Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Revetment (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は重力式海洋構造物の滑動を防止し、安定化を図
るための海洋構造物の安定化工法に関するものである。DETAILED DESCRIPTION OF THE INVENTION <Industrial Field of Application> The present invention relates to a method for stabilizing a gravity-type marine structure for preventing sliding and stabilizing the marine structure.
〈従来の技術の問題点〉
重力式防波堤などの海洋構造物の構築においては、波や
地震などの外力による構造物の滑動を防止することが、
設計施工上の重要なポイントである。<Problems with conventional technology> When constructing marine structures such as gravity breakwaters, it is important to prevent the structures from sliding due to external forces such as waves and earthquakes.
This is an important point in design and construction.
そこで従来は、外力に対する滑動抵抗を得るため、構造
物自体に大きな自重が必要であった。Therefore, conventionally, in order to obtain sliding resistance against external forces, the structure itself required a large weight.
特に、没水型の重力式構造物の場合は、構造物の全体積
に浮力が作用するため、滑動抵抗に要する構造物の重量
の確保が困難であった。In particular, in the case of submerged gravity-type structures, buoyancy acts on the entire volume of the structure, making it difficult to ensure the weight of the structure required for sliding resistance.
〈本発明の目的〉
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、波や地震等の外力に対する充分な滑動抵抗を確
保することができる海洋構造物の安定化工法を提供する
ことを目的とする。<Objective of the present invention> The present invention was made to solve the above-mentioned problems, and provides a method for stabilizing offshore structures that can ensure sufficient sliding resistance against external forces such as waves and earthquakes. The purpose is to provide.
〈問題点を解決するための手段〉
即ち本発明は、海底に一次捨石マウンドを構築し、この
一次捨石マウンド上に、下部にネットを一体に取り付け
た構造物を設置し、ネットを構造物の下部の周囲に展開
し、この展開したネットの上に二次捨石マウンドを構築
することを特徴とした、海洋構造物の安定化工法である
。<Means for solving the problem> That is, the present invention constructs a primary rubble mound on the seabed, installs a structure with a net integrally attached to the lower part of the primary rubble mound, and connects the net to the structure. This is a method of stabilizing offshore structures that is characterized by expanding the net around the bottom and building a secondary rubble mound on top of this expanded net.
また、上記の海洋構造物の安定化工法において、前記の
展開したネットの周縁部に、予めマットを取り付けてお
き、前記二次捨石マウンドの構築の際に、二次捨石マウ
ンドの周縁下端部を、マットの上面に位置させることを
特徴とした、海洋構造物の安定化工法である。In addition, in the above method for stabilizing offshore structures, a mat is attached in advance to the periphery of the developed net, and when constructing the secondary rubble mound, the lower end of the periphery of the secondary rubble mound is , is a method of stabilizing marine structures that is characterized by placing it on the top surface of a mat.
〈本発明の説明〉 以下、本発明の詳細な説明する。<Description of the present invention> The present invention will be explained in detail below.
〈イ〉構造物の設置
先ず、海底に一次捨石マウンド１を構築し、この一次捨
石マウンド１上に、下部にネット２を一体に取り付けた
構造物３を設置する。<A> Installation of structure First, a primary rubble mound 1 is constructed on the seabed, and a structure 3 with a net 2 integrally attached to the lower part is installed on top of this primary rubble mound 1.
ネット２は、捨石間の凹凸になじむ程度の撓性を有し、
かつ波力などの外力に充分抵抗できる強度を有する素材
で作製する（細い鋼線など〉。The net 2 has enough flexibility to fit the unevenness between the rubble stones,
It must also be made of a material (such as thin steel wire) that is strong enough to resist external forces such as wave force.
このネット２を構造物３の下部に取り付ける場合は、構
造物３の構築時に、予めネット２の端縁を構造物３内に
埋め込んでおく方法や、あるいは固定金具及びボルトな
どにより、構造物３の外面に取り付ける方法などが考え
られる。When attaching this net 2 to the lower part of the structure 3, when constructing the structure 3, the edge of the net 2 is embedded in the structure 3 in advance, or by fixing metal fittings and bolts, etc. Possible methods include attaching it to the outside surface of the
〈口〉ネットの展開・二次捨石マウンドの構築次に、ネ
ット２を一次捨石マウンド１及び海底地盤の表面に展開
する。<Exposure> Deploying the net and constructing the secondary rubble mound Next, the net 2 is deployed on the surface of the primary rubble mound 1 and the seabed ground.
そして、この展開したネット２の上に捨石を積層して、
二次捨石マウンド４を所定の高さまで構築する。Then, stack rubble stones on top of this unfolded net 2,
A secondary rubble mound 4 is constructed to a predetermined height.
〈ハ〉マットの取付
上記施工方法に加えて、第４図に示すように、展開した
ネット２の周縁部に、予めマット５あるいはシートを一
体に取り付けておく。<C> Attaching the mat In addition to the above-mentioned construction method, as shown in FIG. 4, a mat 5 or a sheet is integrally attached to the peripheral edge of the unfolded net 2 in advance.
そして、二次捨石マウンド４の構築の際に、二次捨石マ
ウンド４の周縁下端部を、マット５等の上面に位置する
ように構築する。When constructing the secondary rubble mound 4, the lower end of the periphery of the secondary rubble mound 4 is constructed so as to be located on the upper surface of the mat 5 and the like.
〈本発明の作用〉 次に本発明の作用について説明する。<Action of the present invention> Next, the operation of the present invention will be explained.
〈イ〉ネットによる捨石自重の伝達作用（第３図）構造
物３に波力ａなどの外力が作用すると、構造物３を滑動
させようとする。<A> Transmission of rubble weight by the net (Figure 3) When an external force such as wave force a acts on the structure 3, the structure 3 tends to slide.
この波力ａに対し、構造物３の自重すが、構造物３と捨
石群との摩擦を介して、滑動抵抗力として働き、構造物
３を安定に保っている。Against this wave force a, the weight of the structure 3 acts as a sliding resistance force through friction between the structure 3 and the group of rubble stones, and keeps the structure 3 stable.
本発明は、捨石群の内部に、構造物３と一体化した撓性
を有するネット２を埋設し、捨石群の凹凸部とネット２
を噛み合わせることにより、捨石群の自重Ｃの一部の力
ｄを、ネット２を介して構造物３に伝達することができ
る。In the present invention, a flexible net 2 integrated with a structure 3 is buried inside a group of rubble stones, and the uneven portions of the group of rubble stones and the net 2 are buried.
By meshing, a part of the force d of the own weight C of the rubble group can be transmitted to the structure 3 via the net 2.
従って、構造物３の有効な自重が増加し、構造物３の滑
動抵抗力ｅが増加することになる。Therefore, the effective weight of the structure 3 increases, and the sliding resistance e of the structure 3 increases.
〈口〉位相差による作用
一般に、構造物３に最も大きい水平方向の波力ａが作用
する時は、構造物３の安定上危険である上向きの波力ｆ
が作用する。<Exposure> Effect due to phase difference Generally, when the largest horizontal wave force a acts on the structure 3, the upward wave force f is dangerous for the stability of the structure 3.
acts.
しかし、構造物３と捨石群に作用する波力に位相差が生
じることから、二次捨石マウンド４の巾が十分広い場合
、構造物３に上向きの力が作用している間、捨石群には
下向きの波力が作用し、構造物３の滑動安定上、有効な
力の伝達が行われる。However, since there is a phase difference between the wave forces acting on the structure 3 and the group of rubble, if the width of the secondary rubble mound 4 is sufficiently wide, while the upward force is acting on the structure 3, the group of rubble will A downward wave force acts on the structure 3, and an effective force is transmitted for the sliding stability of the structure 3.
〈ハ〉マットによる作用
マット５あるいはシートを、第４図に示すように、二次
捨石マウンド４の周縁下端部より外側に設置することに
より、洗掘防止工としての機能を付加することができる
。<C> Function of the mat By installing the mat 5 or sheet outside the lower edge of the periphery of the secondary rubble mound 4 as shown in Fig. 4, it is possible to add a function as a scour prevention work. .
マット５には、透水性のプレハブ砂利マット、合成繊維
の手織繊維マット、アスファルトマットなどが設計上、
施工上ともに適当である。Mat 5 includes water-permeable prefabricated gravel mats, hand-woven synthetic fiber mats, asphalt mats, etc.
Both are suitable for construction.
一般に、洗掘防止工は構造物３の安定性増加にかかわら
ず行われるものであるから、ネット＋マットの敷設費用
は、一部当然行われるべき洗掘防止工の費用に吸収され
るので、大幅なコストアップにならないで済む。In general, scour prevention work is carried out regardless of the increase in stability of the structure 3, so the cost of laying the net + mat is partially absorbed by the cost of the scour prevention work that should be carried out. There is no need for a significant cost increase.
〈本発明の効果〉
本発明は以上説明したようになるので、次のような効果
を期待することができる。<Effects of the Present Invention> Since the present invention has been described above, the following effects can be expected.
〈イ〉海洋構造物の構築において、従来は、外力に対す
る滑動抵抗を得るため、構造物自体に大きな自重が必要
であった。(a) In the construction of offshore structures, conventionally, the structure itself required a large weight in order to obtain sliding resistance against external forces.
それに対して本発明は、ネットによって、捨石の滑動抵
抗が構造物に伝達されるため、波や地震等の外力に対す
る充分な滑動抵抗を確保することができ、構造物の安定
化を図ることができる。In contrast, in the present invention, since the sliding resistance of the rubble is transmitted to the structure by the net, it is possible to ensure sufficient sliding resistance against external forces such as waves and earthquakes, and to stabilize the structure. can.
〈口〉本発明は、特に、構造物の全体積に浮力が作用す
るような、没水型の重力式構造物の滑動防止に効果的で
ある。<Exposure> The present invention is particularly effective in preventing sliding of submerged gravity-type structures in which buoyancy acts on the entire volume of the structure.
〈ハ〉構造物と捨石群に作用する波力に位相差が生しる
ことから、構造物の安定上危険である上向きの波力が作
用する時に、捨石群には下向きの波力が作用し、構造物
の滑動安定上、有効な力の伝達が行われる。<C> Since there is a phase difference between the wave forces acting on the structure and the group of rubble, when upward wave force acts on the structure, which is dangerous for the stability of the structure, downward wave force acts on the group of rubble. However, effective force transmission is performed for the sliding stability of the structure.
〈二〉展開したネットの周縁部に取り付けたマットある
いはシートを、二次捨石マウンドの周縁下端部より外側
に設置することにより、洗掘防止工としての機能を付加
することができる。(2) By installing a mat or sheet attached to the periphery of the developed net outside the lower end of the periphery of the secondary rubble mound, a scour prevention function can be added.
そのため、洗掘防止工の施工を兼ねることができ、施工
費用の大幅な上昇を抑えることができる。Therefore, it can also serve as a scour prevention work, and a significant increase in construction costs can be suppressed.
第１．２図１本発明の施工方法の説明同第３囚二作用を
示す説明図Figure 1.2 Figure 1 Explanation of the construction method of the present invention Figure 3 Explanatory diagram showing the effect
Claims (2)
マウンド上に、下部にネットを一体に取り付けた構造物
を設置し、ネットを構造物の下部の周囲に展開し、この
展開したネットの上に二次捨石マウンドを構築すること
を特徴とした、海洋構造物の安定化工法。(1) Build a primary rubble mound on the seabed, install a structure with a net integrally attached to the bottom of the primary rubble mound, deploy the net around the bottom of the structure, and A stabilization method for offshore structures that consists of constructing a secondary rubble mound on top.
工法において、前記の展開したネットの周縁部に、予め
マットあるいはシートを取り付けておき、前記二次捨石
マウンドの構築の際に、二次捨石マウンドの周縁下端部
を、マットあるいはシートの上面に位置させることを特
徴とした、海洋構造物の安定化工法。(2) In the method for stabilizing offshore structures as set forth in claim 1, a mat or sheet is attached in advance to the peripheral edge of the developed net, and when constructing the secondary rubble mound, , a method for stabilizing offshore structures, characterized by positioning the lower edge of the periphery of the secondary rubble mound on the top surface of a mat or sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6092990A JP2736932B2 (en) | 1990-03-14 | 1990-03-14 | Offshore structure stabilization method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6092990A JP2736932B2 (en) | 1990-03-14 | 1990-03-14 | Offshore structure stabilization method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03262828A true JPH03262828A (en) | 1991-11-22 |
| JP2736932B2 JP2736932B2 (en) | 1998-04-08 |
Family
ID=13156566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6092990A Expired - Lifetime JP2736932B2 (en) | 1990-03-14 | 1990-03-14 | Offshore structure stabilization method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2736932B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013181327A (en) * | 2012-03-01 | 2013-09-12 | Penta Ocean Construction Co Ltd | Rubble layer protective structure for gravity type caisson breakwater |
| JP2016113813A (en) * | 2014-12-15 | 2016-06-23 | 日立造船株式会社 | Supporting structure for breakwater installed on seabed |
-
1990
- 1990-03-14 JP JP6092990A patent/JP2736932B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013181327A (en) * | 2012-03-01 | 2013-09-12 | Penta Ocean Construction Co Ltd | Rubble layer protective structure for gravity type caisson breakwater |
| JP2016113813A (en) * | 2014-12-15 | 2016-06-23 | 日立造船株式会社 | Supporting structure for breakwater installed on seabed |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2736932B2 (en) | 1998-04-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109906292B (en) | System for installing anti-scour material on self-floating marine foundation and related method and use of such system | |
| EP1880058B1 (en) | Flood barrier | |
| CA3196584A1 (en) | System and method for protection of under-slab utilities from changes in soil volume | |
| JPH03262828A (en) | Construction method for stabilizing marine structure | |
| JPH11229346A (en) | Method for reducing uplift on caisson | |
| US6491474B1 (en) | Walking sand snare and method for beach renourishment | |
| JP3823273B2 (en) | Float body sheet | |
| US11149393B2 (en) | Beach erosion inhibitor | |
| JP2001152425A (en) | Impervious structure of revetment | |
| JP2008106441A (en) | Water float barrier | |
| JPH0748849A (en) | Underwater tunnel | |
| JP3738101B2 (en) | Water bottom laying sheet | |
| JP2000328518A (en) | Light anchorage with legs | |
| JPH05132913A (en) | Method of installing protective device to big wave | |
| JPH10280461A (en) | Floating preventing device for underground container | |
| KR200442717Y1 (en) | Anchors for establishment of silt or oil barrier | |
| JP2000087330A (en) | Construction method for marine structure | |
| JP4701412B2 (en) | Artificial tidal flat and its construction method | |
| JPH07127035A (en) | Water bottom laying sheet | |
| JPH0827759A (en) | Sand mound foundation construction method by mat covering | |
| JP2617160B2 (en) | Buried pipe and construction method of buried pipe | |
| JPS6343224Y2 (en) | ||
| JP2001254364A (en) | Sliding resistance increasing method for gravity structure | |
| WO2024112956A1 (en) | Scour protection systems, methods, and apparatus | |
| JP3328084B2 (en) | Mat member mounting structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313117 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| EXPY | Cancellation because of completion of term |