JP6740437B1 - Submarine structure installation jig and subsea structure installation method - Google Patents

Submarine structure installation jig and subsea structure installation method Download PDF

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JP6740437B1
JP6740437B1 JP2019182900A JP2019182900A JP6740437B1 JP 6740437 B1 JP6740437 B1 JP 6740437B1 JP 2019182900 A JP2019182900 A JP 2019182900A JP 2019182900 A JP2019182900 A JP 2019182900A JP 6740437 B1 JP6740437 B1 JP 6740437B1
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seabed
support
submarine
jig
submarine structure
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JP2021059145A (en
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剛 道端
剛 道端
大志 ▲高▼澤
大志 ▲高▼澤
雄一郎 竹山
雄一郎 竹山
雅彦 菅野
雅彦 菅野
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Nippon Steel Engineering Co Ltd
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Abstract

【課題】海底構造物を所定位置に安定状態で保持できる海底構造物設置治具、海底構造物支持体、および海底構造物設置方法を提供する。【解決手段】PLEM10を支持した海底構造物支持体20を、海底構造物設置治具30の支持部32に支持して海底1へ搬送し、治具本体31を海底1に着底させ、位置調整機構33により、治具本体31ないし海底1に対するPLEM10の位置を調整し、海底構造物支持体20を介してPLEM10を海底1に固定し、海底構造物設置治具30を分離して回収する。【選択図】図8PROBLEM TO BE SOLVED: To provide a submarine structure installation jig, a submarine structure support, and a submarine structure installation method capable of stably holding a submarine structure in a predetermined position. SOLUTION: A submarine structure support body 20 supporting a PLEM 10 is supported by a support part 32 of a submarine structure installation jig 30 and conveyed to the seabed 1, and a jig body 31 is set on the seabed 1 to be positioned. The position of the PLEM 10 with respect to the jig body 31 or the seabed 1 is adjusted by the adjustment mechanism 33, the PLEM 10 is fixed to the seabed 1 via the seabed structure support 20, and the seabed structure installation jig 30 is separated and collected. .. [Selection diagram] Figure 8

Description

本発明は、海底構造物設置治具、海底構造物支持体、および海底構造物設置方法に関する。 The present invention relates to a submarine structure installation jig, a submarine structure support, and a submarine structure installation method.

港湾設備として、原油受け入れ用のシーバースが用いられている。シーバースは、海上の大型ブイと陸上の貯油タンクとを海底パイプラインで結び、大型タンカーをブイに接舷させて積み荷の原油を直接陸揚げできるようにする設備である。
海底パイプラインにはPLEM(パイプライン終端マニフォールド)が設置され、複数のブイに分岐接続されることがある(特許文献1参照)。
Sea berths for receiving crude oil are used as port facilities. The sea berth is a facility that connects a large buoy on the sea and an on-shore oil storage tank with an undersea pipeline so that a large tanker can be connected to the buoy and the crude oil in the cargo can be directly landed.
A PLEM (pipeline end manifold) is installed in the submarine pipeline and may be branched and connected to a plurality of buoys (see Patent Document 1).

このようなPLEMやパイプライン配管などの海底構造物は、予め陸上で製作され、バージなどに載せて設置水域へ搬送され、クレーン船などで吊り下げて海底の所定位置に設置される。海底構造物は、設置の後にその自重により海底の地盤に沈下しないように、脚部として格子状の平板(マッドマット)により支持される。 Such a submarine structure such as PLEM or pipeline piping is manufactured on land in advance, placed on a barge or the like, transported to an installation water area, and hung by a crane ship or the like to be installed at a predetermined position on the seabed. The submarine structure is supported by a grid-like flat plate (mud mat) as a leg so that the submarine structure does not sink to the ground on the seabed due to its own weight after installation.

特開昭59−38187号公報JP-A-59-38187

前述した海底構造物は、設置の際にクレーン船などで吊り下げて海底に配置され、パイプライン等の他の構造物との接続等の作業を施される。
ここで、海上のクレーン船は、海面の波浪等により動揺し、クレーンで吊られている海底構造物も動揺することがある。
海底構造物が揺れると、設置位置が変動することがあるため、正確な位置に据え付けることが困難なうえ、潜水士への安全の配慮も考慮しなければならなかった。
At the time of installation, the above-mentioned submarine structure is hung by a crane ship or the like and placed on the seabed, and work such as connection with other structures such as a pipeline is performed.
Here, a crane ship on the sea may sway due to waves on the sea surface, and the seabed structure suspended by the crane may also sway.
When the submarine structure shakes, the installation position may change, which makes it difficult to install it in the correct position, and it was necessary to consider the safety consideration for the diver.

本発明の目的は、海底構造物を所定位置に安定状態で保持できる海底構造物設置治具、海底構造物支持体、および海底構造物設置方法を提供することにある。 An object of the present invention is to provide a submarine structure installation jig, a submarine structure support, and a submarine structure installation method that can hold a submarine structure in a predetermined position in a stable state.

本発明の海底構造物設置治具は、海底に着底可能な治具本体と、海底構造物を支持する支持部と、前記治具本体に対する前記海底構造物の位置を調整可能な位置調整機構とを有することを特徴とする。 The submarine structure installation jig of the present invention is a jig main body capable of landing on the seabed, a support portion for supporting the submarine structure, and a position adjusting mechanism capable of adjusting the position of the submarine structure with respect to the jig main body. And having.

このような本発明では、海底構造物を支持部により治具本体に支持し、治具本体をクレーン船などで吊り下げて海底へと搬送する。
治具本体が海底に着底させクレーンの吊下ワイヤーを分離することで、波浪等によりクレーン船ないしクレーン自体が動揺しても、治具本体に支持された海底構造物に動揺は伝わらず、安定状態で保持することができる。
海底構造物は、位置調整機構により治具本体ないし海底に対して位置調整することができる。従って、本発明の海底構造物設置治具により、海底構造物を所定位置に安定状態で保持できる。
In the present invention as described above, the submarine structure is supported by the jig main body by the supporting portion, and the jig main body is hung by a crane ship or the like and conveyed to the seabed.
By separating the hanging wire of the crane by making the jig body bottom on the seabed, even if the crane ship or the crane itself sways due to waves etc., the sway is not transmitted to the seabed structure supported by the jig body, It can be held in a stable state.
The position of the seabed structure can be adjusted with respect to the jig body or the seabed by the position adjusting mechanism. Therefore, the seabed structure installation jig of the present invention can hold the seabed structure at a predetermined position in a stable state.

本発明の海底構造物設置治具において、前記治具本体は、鋼材で組まれた上面部と一対の側面部とを有する門型フレームであり、前記側面部の下部には海底に着底する平板状の着底部が設置され、前記支持部は、前記上面部に前記海底構造物を吊り下げ支持する懸垂ワイヤーと、前記側面部と前記海底構造物とを結ぶ横引ワイヤーと、を有し、前記位置調整機構は、前記懸垂ワイヤーおよび前記横引ワイヤーの長さ調整機構で構成されることが好ましい。 In the submarine structure installation jig of the present invention, the jig main body is a gate-shaped frame having an upper surface part made of steel and a pair of side surface parts, and the bottom part of the side surface part bottoms on the seabed. A flat plate-shaped bottoming part is installed, and the supporting part has a suspension wire that suspends and supports the submarine structure on the upper surface part, and a horizontal pulling wire that connects the side surface part and the submarine structure. It is preferable that the position adjusting mechanism includes a length adjusting mechanism for the suspension wire and the horizontal pulling wire.

このような本発明では、治具本体として門型フレームを用い、両側の側面部の下部に形成された着底部で海底に着底させるので、海底に着底した際に海底構造物を確実に安定保持できる。
さらに、懸垂ワイヤーおよび横引ワイヤーを用いて海底構造物を門型フレームの内側に支持するとともに、各ワイヤーの長さ調整により門型フレームないし海底に対する位置を調整でき、簡素な構造で、確実な位置調整および安全な接続作業を行うことができる。
In the present invention as described above, since the gate-shaped frame is used as the jig main body, and the bottom is formed on the bottom of the side portions on both sides, the bottom is fixed to the sea bottom. Can be held stable.
Furthermore, while supporting the submarine structure inside the portal frame using the suspending wire and the horizontal pulling wire, the position of the wire relative to the portal frame or the seabed can be adjusted by adjusting the length of each wire. Position adjustment and safe connection work can be performed.

本発明の海底構造物支持体は、海底構造物を支持する支持体本体と、前記支持体本体から下方へ突出する高さ位置調整可能で海底に着底可能な脚部と、を有することを特徴とする。 The submarine structure support of the present invention has a support main body that supports the submarine structure, and a leg portion that protrudes downward from the support main body and is adjustable in height position and capable of landing on the seabed. Characterize.

このような本発明では、支持体本体で海底構造物を支持し、支持体本体をクレーン船などで吊り下げて海底に設置する。設置する際には、前述した本発明の海底構造物設置治具を用いて海底に対して安定支持することが好ましい。
海底に設置された海底構造物は、他の構造物との接続にあたって所定の位置(平面位置および水深)に配置される必要がある。前述した本発明の海底構造物設置治具を用いることで海底に対する海底構造物の位置を適切に調整できる。
所定の位置に配置された海底構造物と、当該位置の海底との離隔(距離)は海底の起伏等に依り場所により変動する。本発明においては、支持体本体から下方へ突出する脚部の高さ位置を調整することで、この脚部により海底に確実に着底させることができる。従って、脚部の高さ位置調整によって、海底構造物を海底の起伏に依らず海底の所定位置に安定状態で保持することができる。
In the present invention as described above, the submarine structure is supported by the support body, and the support body is hung by a crane ship or the like and installed on the seabed. When installing, it is preferable to stably support the seabed using the above-described seabed structure installation jig of the present invention.
The seabed structure installed on the seabed needs to be arranged at a predetermined position (planar position and water depth) for connection with another structure. By using the jig for installing a submarine structure of the present invention described above, the position of the submarine structure with respect to the seabed can be appropriately adjusted.
The distance (distance) between the seabed structure arranged at a predetermined position and the seabed at the position varies depending on the location depending on the ups and downs of the seabed. In the present invention, by adjusting the height position of the leg portion projecting downward from the support body, the leg portion can surely land on the seabed. Therefore, by adjusting the height position of the legs, the seabed structure can be stably held at a predetermined position on the seabed regardless of the ups and downs of the seabed.

本発明の海底構造物支持体において、前記支持体本体は、鋼材で組まれた支持体フレームであり、前記脚部は、前記支持体フレームに上下にスライド自在かつ所定高さで固定可能な柱状部材と、前記柱状部材に接続されて海底に着底可能な平板状部材と、を有することが好ましい。 In the submarine structure support of the present invention, the support body is a support frame assembled of steel, and the legs are columnar slidable vertically on the support frame and can be fixed at a predetermined height. It is preferable to have a member and a flat plate-like member which is connected to the columnar member and can be attached to the seabed.

このような本発明では、支持体フレームに支持した海底構造物を所定の高さ(水深)に配置し、柱状部材をスライドさせて平板状部材を着底させ、この状態で柱状部材を支持体フレームに固定する。これにより、平板状部材および柱状部材を脚部として支持体フレームおよび海底構造物を所定の高さに固定することができる。 In the present invention as described above, the submarine structure supported by the support frame is arranged at a predetermined height (water depth), the columnar member is slid to bottom the flat plate-like member, and in this state, the columnar member is supported by the supporter. Fix to the frame. This makes it possible to fix the support body frame and the submarine structure at a predetermined height by using the flat plate-shaped member and the columnar member as legs.

本発明の海底構造物設置方法は、海底に着底可能な治具本体と、海底構造物を支持する支持部と、前記治具本体に対する前記海底構造物の位置を調整可能な位置調整機構とを有する海底構造物設置治具を用い、前記海底構造物を前記海底構造物設置治具の前記支持部に支持し、前記海底構造物設置治具とともに前記海底構造物を海底へ搬送し、前記海底構造物設置治具の前記治具本体を海底に着底させ、前記位置調整機構で前記治具本体ないし海底に対する前記海底構造物の位置を調整し、前記海底構造物を海底に対して固定し、前記海底構造物から前記海底構造物設置治具を分離し、前記海底構造物設置治具を回収することを特徴とする。 The submarine structure installation method of the present invention includes a jig body capable of landing on the seabed, a support portion for supporting the submarine structure, and a position adjusting mechanism capable of adjusting the position of the submarine structure with respect to the jig body. Using a submarine structure installation jig having, by supporting the submarine structure to the support portion of the submarine structure installation jig, and conveys the submarine structure together with the submarine structure installation jig to the seabed, The jig main body of the submarine structure installation jig is set on the bottom of the sea, and the position adjusting mechanism adjusts the position of the submarine structure with respect to the jig main body or the sea bottom, and fixes the submarine structure to the sea bottom. Then, the submarine structure installation jig is separated from the submarine structure, and the submarine structure installation jig is recovered.

このような本発明では、治具本体が海底に着底することで、潮流などがあっても治具本体に支持された海底構造物が揺れなどを生じにくく、安定状態で保持することができる。海底構造物は、位置調整機構により治具本体ないし海底に対して位置調整することで、所定位置に保持し接続することができる。
さらに、海底構造物設置治具は、海底に固定した海底構造物から取り外して回収するため、海底の海底構造物の周辺スペースを占有することがなく、また海底構造物設置治具の鋼材を再利用することもできる。
In the present invention as described above, since the jig body bottoms on the seabed, the seabed structure supported by the jig body is unlikely to shake even if there is a tidal current, etc., and can be held in a stable state. .. The seabed structure can be held and connected at a predetermined position by adjusting its position with respect to the jig body or the seabed by the position adjusting mechanism.
Furthermore, the submarine structure installation jig is removed from the submarine structure fixed to the seabed and collected, so that it does not occupy the space around the submarine structure on the seabed and the steel material of the submarine structure installation jig is reused. It can also be used.

本発明の海底構造物設置方法において、前記海底構造物を支持する支持体本体と、前記支持体本体から下方へ突出する高さ位置調整可能で海底に着底可能な脚部と、を有する海底構造物支持体を用い、前記海底構造物を前記支持部に支持する前に、前記海底構造物を前記支持体本体に支持しておき、海底に対する前記海底構造物の位置を調整したのち、前記脚部の高さを調整して海底に着底させ、前記海底構造物支持体を介して前記海底構造物を海底に支持する、ことが好ましい。 In the method of installing a seabed structure of the present invention, a seabed having a support body that supports the seabed structure, and a leg portion that protrudes downward from the support body and is adjustable in height position and capable of landing on the seabed. Using a structure support, before supporting the seabed structure to the support portion, the seabed structure is supported on the support body, after adjusting the position of the seabed structure with respect to the seabed, the It is preferable that the height of the legs is adjusted so that the legs come to the bottom of the sea and the seabed structure is supported by the seabed via the seabed structure support.

このような本発明では、位置調整機構により所定の位置(他の構造物との接続に必要な平面位置および水深)に配置される。この際、所定の位置に配置された海底構造物と、当該位置の海底との離隔は場所により変動する。本発明においては、支持体本体から下方へ突出する脚部の高さ位置を調整することで、この脚部により海底に確実に着底させることができ、海底構造物を海底の所定位置に安定状態で保持することができる。 In the present invention as described above, the position adjusting mechanism is arranged at a predetermined position (a plane position and a water depth necessary for connection with another structure). At this time, the distance between the seabed structure arranged at a predetermined position and the seabed at the position varies depending on the place. In the present invention, by adjusting the height position of the leg portion projecting downward from the support body, the leg portion can surely land on the seabed, and the seafloor structure can be stabilized at a predetermined position on the seabed. Can be held in a state.

本発明によれば、海底構造物を所定位置に安定状態で保持できる海底構造物設置治具、海底構造物支持体、および海底構造物設置方法を提供することができる。 ADVANTAGE OF THE INVENTION According to this invention, the submarine structure installation jig, the submarine structure support body, and the subsea structure installation method which can hold a submarine structure in a predetermined position in a stable state can be provided.

本発明の一実施形態で設置する海底構造物を示す側面図。The side view which shows the seabed structure installed in one Embodiment of this invention. 前記実施形態の海底構造物支持体を示す斜視図。The perspective view which shows the submarine structure support body of the said embodiment. 前記実施形態の海底構造物支持体の脚部を示す拡大斜視図。The expanded perspective view which shows the leg part of the submarine structure support body of the said embodiment. 前記実施形態の海底構造物設置治具を示す斜視図。The perspective view which shows the submarine structure installation jig of the said embodiment. 前記実施形態の海底構造物設置治具を示す正面図。The front view which shows the submarine structure installation jig of the said embodiment. 前記実施形態の海底構造物設置治具の吊下状態を示す斜視図。The perspective view which shows the suspended state of the submarine structure installation jig of the said embodiment. 前記実施形態の搬送工程を示す側面図。The side view which shows the conveyance process of the said embodiment. 前記実施形態の位置調整工程を示す側面図。The side view which shows the position adjustment process of the said embodiment. 前記実施形態の固定工程を示す側面図。The side view which shows the fixing process of the said embodiment. 前記実施形態の回収工程を示す側面図。The side view which shows the collection process of the said embodiment. 前記実施形態の埋設工程を示す側面図。The side view which shows the burying process of the said embodiment.

以下、本発明の一実施形態を図面に基づいて説明する。
図1において、本実施形態は、海底1にあるパイプライン2の終端に、海底構造物であるPLEM10(パイプライン終端マニフォールド)を設置し接続するものである。
本実施形態では、PLEM10の設置作業にクレーン船3を用いるとともに、本発明に基づく海底構造物支持体20(図2および図3参照)および海底構造物設置治具30(図4ないし図6参照)を用いる。
An embodiment of the present invention will be described below with reference to the drawings.
In FIG. 1, in the present embodiment, a PLEM 10 (pipeline end manifold), which is a submarine structure, is installed and connected to the end of a pipeline 2 on the seabed 1.
In this embodiment, the crane ship 3 is used for the installation work of the PLEM 10, and the submarine structure support 20 (see FIGS. 2 and 3) and the submarine structure installation jig 30 (see FIGS. 4 to 6) based on the present invention. ) Is used.

図2において、PLEM10は、接続端11を有する本管12と、本管12の両側から分岐して斜め上向きに延びる一対の分岐管13とを有する。
図1に示すように、PLEM10は、海底1に設置された際に、本管12がパイプライン2の延長線上に配置され、接続端11でパイプライン2に接続される。パイプライン2に接続された本管12および分岐管13の一部は、海底1に埋設される。分岐管13は、先端14が海底1から斜め上向きに立ち上げられ、この先端14にはマリンホース4が接続され、タンカー係留用のブイへと接続される。
In FIG. 2, the PLEM 10 has a main pipe 12 having a connection end 11, and a pair of branch pipes 13 that branch from both sides of the main pipe 12 and extend obliquely upward.
As shown in FIG. 1, when the PLEM 10 is installed on the seabed 1, a main pipe 12 is arranged on an extension line of the pipeline 2 and is connected to the pipeline 2 at a connection end 11. A part of the main pipe 12 and the branch pipe 13 connected to the pipeline 2 is buried in the seabed 1. A tip 14 of the branch pipe 13 is raised obliquely upward from the seabed 1, and a marine hose 4 is connected to the tip 14 and is connected to a buoy for mooring a tanker.

図2において、海底構造物支持体20は、海底構造物であるPLEM10を支持する支持体本体21と、支持体本体21から下方へ突出する高さ位置調整可能で海底に着底可能な脚部22と、を有する。 In FIG. 2, a submarine structure support 20 includes a support main body 21 that supports the PLEM 10 that is a submarine structure, and a leg portion that protrudes downward from the support main body 21 and that can adjust the height position and land on the seabed. 22 and.

支持体本体21は、鋼材で組まれた支持体フレーム210で構成されている。
支持体フレーム210は、PLEM10の本管12の中間部から一対の分岐管13に及ぶ範囲の平板状の格子組で形成され、クランプ212で本管12を拘束するとともに、クランプ213で分岐管13を拘束することが可能である。
The support body 21 is composed of a support frame 210 made of steel.
The support body frame 210 is formed of a flat plate-like lattice set in a range extending from the intermediate portion of the main pipe 12 of the PLEM 10 to the pair of branch pipes 13. The clamp 212 holds the main pipe 12 and the clamp 213 holds the branch pipe 13 together. It is possible to restrain.

脚部22は、支持体フレーム210に上下にスライド自在かつ所定高さで固定可能な柱状部材221と、柱状部材221に接続されて海底1に着底可能な平板状部材222と、を有する。
平板状部材222は、平板状の格子組で形成され、海底1に着底する脚部22の底面を形成する。
柱状部材221は、平板状部材222の四隅から上向きに形成され、それぞれ支持体フレーム210に固定された筒状部材223に挿通されて上下に自在にスライドする。
The leg portion 22 has a columnar member 221 that is slidable in the vertical direction on the support frame 210 and can be fixed at a predetermined height, and a flat plate-like member 222 that is connected to the columnar member 221 and can be attached to the seabed 1.
The flat plate-shaped member 222 is formed of a flat plate-shaped lattice set, and forms the bottom surface of the leg portion 22 that bottoms on the seabed 1.
The columnar members 221 are formed upward from the four corners of the flat plate-like member 222, are inserted into the cylindrical members 223 fixed to the support frame 210, and freely slide up and down.

図3において、筒状部材223には直径方向に対向する一対の外側ピン孔224が形成され、柱状部材221には異なる高さに直径方向に対向する一対の内側ピン孔225が複数対形成されている。筒状部材223に対して柱状部材221を所望の高さに配置し、筒状部材223の外側ピン孔224に、柱状部材221の内側ピン孔225のうち最寄りの高さのいずれかを合わせ、この状態で連通状態の外側ピン孔224および内側ピン孔225にボルト226を挿通し、ダブルナット227で抜け止めすることで、柱状部材221は支持体フレーム210に対して所定高さで固定可能である。
これらの柱状部材221の高さ調整により、平板状部材222は支持体フレーム210の下方への突き出し高さを調整可能である。
In FIG. 3, the cylindrical member 223 is formed with a pair of diametrically opposed outer pin holes 224, and the columnar member 221 is formed with a plurality of pairs of diametrically opposed inner pin holes 225 at different heights. ing. The columnar member 221 is arranged at a desired height with respect to the tubular member 223, and one of the inner pin holes 225 of the columnar member 221 that is closest in height is aligned with the outer pin hole 224 of the tubular member 223. In this state, the columnar member 221 can be fixed to the support frame 210 at a predetermined height by inserting the bolt 226 into the outer pin hole 224 and the inner pin hole 225 which are in communication with each other and preventing the bolt 226 from coming off. is there.
By adjusting the heights of these columnar members 221, the flat plate-shaped member 222 can adjust the protruding height of the support body frame 210 downward.

図4および図5において、海底構造物設置治具30は、海底1に着底可能な治具本体31と、海底構造物であるPLEM10を支持する支持部32と、治具本体31に対するPLEM10の位置を調整可能な位置調整機構33とを有する。 In FIG. 4 and FIG. 5, the submarine structure installation jig 30 includes a jig main body 31 capable of bottoming on the seabed 1, a support portion 32 for supporting the PLEM 10 that is the submarine structure, and the PLEM 10 for the jig main body 31. It has a position adjusting mechanism 33 capable of adjusting the position.

治具本体31は、鋼材で組まれた上面部311と一対の側面部312とを有する門型フレーム310であり、側面部312の下部には海底に着底する平板状の着底部313が設置されている。 The jig body 31 is a gate-shaped frame 310 having an upper surface portion 311 made of steel and a pair of side surface portions 312, and a flat plate-shaped bottom portion 313 that bottoms on the seabed is installed below the side surface portion 312. Has been done.

門型フレーム310の上面部311は、海底構造物支持体20の支持体本体21よりも一回り大きい平面形状の軸組体である。側面部312は、上面部311の両側から下向きに形成された壁状の軸組体である。着底部313は、平板状の格子組で形成され、複数がそれぞれ側面部312の下部から外側へ張り出すように設置されている。
門型フレーム310は、これらの上面部311および一対の側面部312で門型に形成され、下面側の開口部分から海底構造物支持体20に支持されたPLEM10(図2参照)を導入し、門型フレーム310の内側に収容することが可能である。
The upper surface 311 of the gate-shaped frame 310 is a plane-shaped frame assembly that is slightly larger than the support body 21 of the submarine structure support 20. The side surface portion 312 is a wall-shaped shaft assembly formed downward from both sides of the upper surface portion 311. The bottoming portion 313 is formed of a flat plate-shaped lattice set, and a plurality of the bottoming portion 313 are installed so as to project outward from the lower portion of the side surface portion 312.
The gate-shaped frame 310 is formed in a gate shape with the upper surface portion 311 and the pair of side surface portions 312, and introduces the PLEM 10 (see FIG. 2) supported by the submarine structure support body 20 from the opening portion on the lower surface side, It can be housed inside the gate-shaped frame 310.

支持部32は、上面部311にPLEM10を吊り下げ支持する懸垂ワイヤー321、および側面部312とPLEM10とを結ぶ横引ワイヤー322で構成されている。
位置調整機構33は、懸垂ワイヤー321の途中に設置されたターンバックル式もしくはレバー、チェーンブロック式の長さ調整機構331、および横引ワイヤー322の途中に設置されたターンバックル式もしくはレバー、チェーンブロック式の長さ調整機構332で構成されている。
図5では、代表的な懸垂ワイヤー321および横引ワイヤー322、およびその長さ調整機構331,332を示しているが、全ての懸垂ワイヤー321および横引ワイヤー322に長さ調整機構331,332が設置されている。
The support portion 32 includes a suspension wire 321 that suspends and supports the PLEM 10 on the upper surface 311, and a horizontal pull wire 322 that connects the side surface portion 312 and the PLEM 10.
The position adjusting mechanism 33 includes a turnbuckle type or lever installed in the middle of the suspension wire 321, a chain block type length adjusting mechanism 331, and a turnbuckle type or lever installed in the middle of the horizontal pulling wire 322, a chain block. It is composed of a formula length adjusting mechanism 332.
Although FIG. 5 shows a typical suspension wire 321, a horizontal pull wire 322, and length adjustment mechanisms 331 and 332 thereof, the length adjustment mechanisms 331 and 332 are provided on all the suspension wires 321 and horizontal pull wires 322. is set up.

位置調整機構33は、長さ調整機構331で懸垂ワイヤー321の長さを調整することで、上面部311に対するPLEM10の吊り下げ高さを調整可能である。
図5において、懸垂ワイヤー321で所定高さに吊り下げられたPLEM10は、両側一対の横引ワイヤー322により平面位置を規定される。対向する一対の横引ワイヤー322の各々の長さ調整機構331を操作することで、PLEM10の平面位置を調整可能である。例えば、対向する一対の横引ワイヤー322の一方を緩め、他方を縮めることで、PLEM10の吊下位置を緩めた側に変位させることができる。
The position adjustment mechanism 33 can adjust the suspension height of the PLEM 10 with respect to the upper surface portion 311 by adjusting the length of the suspension wire 321 by the length adjustment mechanism 331.
In FIG. 5, the PLEM 10 suspended at a predetermined height by the suspension wire 321 has a plane position defined by a pair of lateral pull wires 322. The plane position of the PLEM 10 can be adjusted by operating the length adjusting mechanism 331 of each of the pair of horizontal pulling wires 322 facing each other. For example, the suspension position of the PLEM 10 can be displaced to the loosened side by loosening one of the pair of opposing horizontal pulling wires 322 and contracting the other.

支持部32である懸垂ワイヤー321および横引ワイヤー322は、PLEM10に直接接続されてもよいし、PLEM10を支持した海底構造物支持体20を介して間接的に接続されてもよい。 The suspension wire 321 and the horizontal pulling wire 322 which are the support portions 32 may be directly connected to the PLEM 10 or may be indirectly connected via the submarine structure support body 20 supporting the PLEM 10.

懸垂ワイヤー321とは別に、上面部311と柱状部材221の上端との間には、それぞれ海底構造物支持体20の脚部22を移動上限まで引き上げた状態(収納状態)に保持する脚部収納ワイヤー228が設置されている。 Separately from the suspension wire 321, between the upper surface portion 311 and the upper end of the columnar member 221, the leg portion 22 for holding the leg portion 22 of the submarine structure support body 20 in a state (stored state) pulled up to the upper limit of movement. The wire 228 is installed.

図6において、上面部311には複数の吊下部314が設置され、各々に吊下ワイヤー315が接続可能である。従って、海底構造物設置治具30は、内側に海底構造物支持体20に支持されたPLEM10を収容した状態で、吊下ワイヤー315を介してクレーン船3(図1および図7参照)で吊下可能である。 In FIG. 6, a plurality of hanging parts 314 are installed on the upper surface part 311, and a hanging wire 315 can be connected to each of them. Therefore, the submarine structure installation jig 30 is hung by the crane ship 3 (see FIGS. 1 and 7) via the hanging wire 315 in a state where the PLEM 10 supported by the submarine structure support 20 is accommodated inside. It is possible.

本実施形態では、前述した海底構造物支持体20(図2および図3参照)および海底構造物設置治具30(図4ないし図6参照)を用いて、次のような手順で海底1にPLEM10を設置する。 In the present embodiment, by using the above-described submarine structure support 20 (see FIGS. 2 and 3) and the submarine structure installation jig 30 (see FIGS. 4 to 6), the submarine 1 is mounted in the following procedure. Install PLEM10.

先ず、陸上での準備工程として、図2のように、PLEM10を製作し、製作されたPLEM10を海底構造物支持体20に支持しておく。このとき、海底構造物支持体20の脚部22は全て収納状態(移動上限)に固定しておく。
次に、図4のように、PLEM10および海底構造物支持体20を覆うように海底構造物設置治具30を設置する。海底構造物設置治具30は、別の場所で組立て、クレーンで吊り上げてPLEM10および海底構造物支持体20の上方から被せるように設置してもよい。
First, as a preparation process on land, as shown in FIG. 2, a PLEM 10 is manufactured, and the manufactured PLEM 10 is supported on a submarine structure support body 20. At this time, all the legs 22 of the submarine structure support body 20 are fixed in the housed state (moving upper limit).
Next, as shown in FIG. 4, the submarine structure installation jig 30 is installed so as to cover the PLEM 10 and the submarine structure support 20. The submarine structure installation jig 30 may be assembled at another place, lifted by a crane, and installed so as to cover the PLEM 10 and the submarine structure support 20 from above.

続いて、海底構造物設置治具30の支持部32で、PLEM10および海底構造物支持体20を海底構造物設置治具30に支持する。この際、懸垂ワイヤー321でPLEM10および海底構造物支持体20を吊り下げるとともに、横引ワイヤー322によりPLEM10および海底構造物支持体20が海底構造物設置治具30の内側の中立位置(各方向への移動代が得られるほぼ中央にあたる位置)に保持しておく。 Subsequently, the PLEM 10 and the submarine structure support 20 are supported by the submarine structure installation jig 30 by the support portion 32 of the submarine structure installation jig 30. At this time, the PLEM 10 and the submarine structure support body 20 are suspended by the suspension wire 321, and the PLEM 10 and the submarine structure support body 20 are suspended by the horizontal pulling wire 322 from the neutral position inside the submarine structure installation jig 30 (in each direction). It is kept at a position near the center where the movement allowance can be obtained).

以上の陸上での準備工程が完了したら、搬送工程として、海底構造物支持体20に保持されたPLEM10とともに海底構造物設置治具30を設置場所へと搬送する。
搬送にあたっては、PLEM10および海底構造物支持体20を収容した海底構造物設置治具30をバージなどに載せて設置海域へと搬送し、設置海域においてクレーン船3で海底構造物設置治具30を海底1へと吊り降ろす(図7参照)。
搬送に先立って、接続するパイプライン2が埋設されている場合は、海底1を掘り下げてパイプライン2を露出させておく。
When the above-described land preparation process is completed, as a transfer process, the submarine structure installation jig 30 is transferred to the installation location together with the PLEM 10 held by the submarine structure support 20.
In transportation, the submarine structure installation jig 30 accommodating the PLEM 10 and the submarine structure support 20 is placed on a barge or the like and transported to the installation sea area, and in the installation sea area, the crane ship 3 mounts the seabed structure installation jig 30. It is hung on the seabed 1 (see Fig. 7).
If the pipeline 2 to be connected is buried before the transportation, the seabed 1 is dug down to expose the pipeline 2.

海底構造物設置治具30を着底部313で海底1に着底させたのち、吊下ワイヤー315を分離するとともに、位置調整工程として、位置調整機構33によるPLEM10の位置調整を行う(図8参照)。
すなわち、図5に示す長さ調整機構331により懸垂ワイヤー321の長さを調整してPLEM10の高さを調整し、長さ調整機構332により横引ワイヤー322の長さを調整してPLEM10の平面位置を調整する。これにより、PLEM10の本管12の中心軸線がパイプライン2の延長線上に揃うように位置調整する。
After the submarine structure installation jig 30 is set on the bottom 1 at the bottom 313, the hanging wire 315 is separated and the position adjusting mechanism 33 adjusts the position of the PLEM 10 as a position adjusting process (see FIG. 8 ). ).
That is, the length adjustment mechanism 331 shown in FIG. 5 adjusts the length of the suspension wire 321 to adjust the height of the PLEM 10, and the length adjustment mechanism 332 adjusts the length of the horizontal wire 322 to adjust the plane of the PLEM 10. Adjust the position. As a result, the position of the central axis of the main pipe 12 of the PLEM 10 is adjusted so as to be aligned with the extension line of the pipeline 2.

位置調整工程で調整された位置でPLEM10を固定するために、固定工程を行う(図9参照)。
海底構造物支持体20において、移動上限に収納されていた脚部22を下方へ移動させ、底面にある平板状部材222を海底1に着底させる。平板状部材222が着底した状態の高さで柱状部材221を支持体フレーム210に固定し、脚部22で海底構造物支持体20ないしPLEM10を海底1に支持する。
固定工程では、脚部22の海底1への固定や、本管12とパイプライン2との接続など、必要な作業を実施する。
A fixing process is performed to fix the PLEM 10 at the position adjusted in the position adjusting process (see FIG. 9 ).
In the submarine structure support 20, the legs 22 accommodated at the upper limit of movement are moved downward, and the flat plate-shaped member 222 on the bottom surface is attached to the bottom 1. The columnar member 221 is fixed to the support body frame 210 at the height where the flat plate-like member 222 is bottomed, and the legs 22 support the submarine structure support body 20 or the PLEM 10 on the seabed 1.
In the fixing step, necessary work such as fixing the legs 22 to the seabed 1 and connecting the main pipe 12 to the pipeline 2 is performed.

PLEM10および海底構造物支持体20が海底1に固定したのち、海底構造物設置治具30の回収工程を行う(図10参照)。
すなわち、懸垂ワイヤー321および横引ワイヤー322(図5参照)を解除して海底構造物設置治具30とPLEM10および海底構造物支持体20とを分離し、クレーン船3で海底構造物設置治具30を吊り上げて回収する。PLEM10および海底構造物支持体20は、固定工程により既に海底1に固定されており、位置調整工程で調整された位置に維持される。
After the PLEM 10 and the submarine structure support 20 are fixed to the submarine 1, the submarine structure installation jig 30 is recovered (see FIG. 10).
That is, the suspension wire 321 and the horizontal pulling wire 322 (see FIG. 5) are released to separate the submarine structure installation jig 30 from the PLEM 10 and the submarine structure support 20, and the crane ship 3 uses the submarine structure installation jig. 30 is lifted and collected. The PLEM 10 and the submarine structure support body 20 are already fixed to the seabed 1 by the fixing process, and are maintained at the positions adjusted by the position adjusting process.

回収工程に続いて、埋設工程として、固定工程で固定されたPLEM10および海底構造物支持体20を埋設し、分岐管13の先端14側だけが海底1から立ち上がった状態とする(図11参照)。
海底1から立ち上がった分岐管13の先端14には、タンカー係留用のブイへと連なるマリンホース4が接続される。
Subsequent to the recovery step, as a burying step, the PLEM 10 and the submarine structure support body 20 fixed in the fixing step are buried so that only the tip 14 side of the branch pipe 13 stands up from the seabed 1 (see FIG. 11). ..
A marine hose 4 connected to a buoy for mooring a tanker is connected to a tip 14 of a branch pipe 13 rising from the seabed 1.

このような本実施形態によれば、以下のような効果が得られる。
本実施形態では、海底構造物であるPLEM10を、海底構造物設置治具30を用いて海底1へと搬送する。すなわち、支持部32により治具本体31に支持し、治具本体31をクレーン船3で吊り下げて海底1へと着底させ、クレーンの吊下ワイヤーを分離する。
海底1では、治具本体31がクレーンとは独立して海底1に着底していることで、波浪等によりクレーン船ないしクレーンが動揺しても、治具本体31に支持されたPLEM10にその動揺は伝わらず、安定状態で保持できる。
PLEM10は、位置調整機構33により接続するパイプライン2に対して水平ないし高さ方向に位置調整することができる。従って、本実施形態の海底構造物設置治具30により、PLEM10を所定位置に安定状態で保持することができる。
According to this embodiment as described above, the following effects can be obtained.
In the present embodiment, the PLEM 10 that is a seabed structure is transported to the seabed 1 using the seabed structure installation jig 30. That is, the jig body 31 is supported by the supporting portion 32, the jig body 31 is hung by the crane ship 3 to be attached to the seabed 1, and the hanging wire of the crane is separated.
On the seabed 1, since the jig body 31 bottoms on the seabed 1 independently of the crane, even if the crane ship or the crane sways due to waves or the like, the PLEM 10 supported by the jig body 31 can Can be held in a stable state without upset.
The PLEM 10 can be horizontally or vertically adjusted in position with respect to the pipeline 2 connected by the position adjusting mechanism 33. Therefore, the submarine structure installation jig 30 of the present embodiment can hold the PLEM 10 at a predetermined position in a stable state.

本実施形態では、治具本体31として門型フレーム310を用い、両側の側面部312の下部に形成された着底部313で海底1に着底させることにより、海底1に着底した際にPLEM10を確実に安定保持できる。
本実施形態では、支持部32として、上面部311にPLEM10を吊り下げ支持する懸垂ワイヤー321と、側面部312とPLEM10を支持する支持体フレーム210とを結ぶ横引ワイヤー322と、を用いるとともに、位置調整機構33として、懸垂ワイヤー321および横引ワイヤー322の長さ調整機構331,332を用いた。このため、簡易な構成で支持部32および位置調整機構33を構成することができ、確実な位置調整を行うことができる。
In this embodiment, the gate-shaped frame 310 is used as the jig main body 31, and the bottoms 313 formed on the lower portions of the side portions 312 on both sides are used to bottom the seabed 1, so that the PLEM 10 when the seabed 1 is reached. Can be securely held.
In the present embodiment, as the support portion 32, a suspension wire 321 that suspends and supports the PLEM 10 on the upper surface portion 311 and a horizontal pull wire 322 that connects the side surface portion 312 and the support body frame 210 that supports the PLEM 10 are used. As the position adjusting mechanism 33, the length adjusting mechanisms 331 and 332 of the suspension wire 321 and the horizontal pulling wire 322 were used. Therefore, the support portion 32 and the position adjusting mechanism 33 can be configured with a simple structure, and reliable position adjustment can be performed.

本実施形態では、支持体本体21でPLEM10を支持し、海底構造物設置治具30を介して支持体本体21をクレーン船3で吊り下げて海底1に設置する。
前述した海底構造物設置治具30を用いて海底1に対するPLEM10の位置を適切に調整した際には、PLEM10と海底1との離隔は場所により変動する。これに対し、支持体本体21から下方へ突出する脚部22の高さ位置を調整することで、この脚部22により海底1に確実に着底させることができる。従って、脚部22の高さ位置調整によって、PLEM10を海底1の所定位置に安定状態で保持することができる。
In the present embodiment, the PLEM 10 is supported by the support body 21, and the support body 21 is hung by the crane ship 3 via the submarine structure installation jig 30 and installed on the seabed 1.
When the position of the PLEM 10 with respect to the seabed 1 is appropriately adjusted using the above-mentioned submarine structure installation jig 30, the separation between the PLEM 10 and the seabed 1 varies depending on the location. On the other hand, by adjusting the height position of the leg portion 22 projecting downward from the support body 21, the bottom portion 22 can surely land on the seabed 1. Therefore, by adjusting the height position of the leg portion 22, the PLEM 10 can be stably held at a predetermined position on the seabed 1.

本実施形態では、支持体フレーム210に支持したPLEM10を所定の高さ(水深)に配置し、柱状部材221をスライドさせて平板状部材222を着底させ、この状態で柱状部材221を支持体フレーム210に固定することで、平板状部材222および柱状部材221を脚部22として支持体フレーム210およびPLEM10を所定の高さに固定することができる。
さらに、柱状部材221のスライド支持に支持体フレーム210に設置された筒状部材223を用い、各々の外側ピン孔224および内側ピン孔225にボルト226を挿通して高さを固定するようにしたので、簡単な構造で確実な固定を行うことができる。
In this embodiment, the PLEM 10 supported by the support frame 210 is arranged at a predetermined height (water depth), the columnar member 221 is slid to cause the flat plate-shaped member 222 to bottom, and in this state, the columnar member 221 is supported by the supporter. By fixing to the frame 210, the support member frame 210 and the PLEM 10 can be fixed to a predetermined height by using the plate member 222 and the columnar member 221 as the leg portion 22.
Further, a cylindrical member 223 installed on the support frame 210 is used for slidably supporting the columnar member 221, and bolts 226 are inserted into the outer pin holes 224 and the inner pin holes 225 to fix the height. Therefore, it is possible to perform a reliable fixing with a simple structure.

本実施形態では、前述した海底構造物設置治具30を用い、PLEM10を海底構造物設置治具30の支持部32に支持し、海底構造物設置治具30とともにPLEM10を海底1へ搬送し(搬送工程)、海底構造物設置治具30の治具本体31を海底1に着底させ、位置調整機構33で接続するパイプライン2に対するPLEM10の位置を調整し(位置調整工程)、PLEM10を海底1に対して固定し(固定工程)、PLEM10から海底構造物設置治具30を分離し、海底構造物設置治具30を回収する(回収工程)とした。
従って、治具本体31が海底1に着底することで、クレーンではなく治具本体31に支持されたPLEM10は動揺せず、安定状態で保持することができる。PLEM10は、接続するパイプライン2に対して位置調整することで、所定位置に保持することができる。
さらに、海底構造物設置治具30は、海底1に固定したPLEM10から取り外して回収するため、海底1のPLEM10の周辺スペースを占有することがなく、また海底構造物設置治具30の鋼材を再利用することもできる。
In the present embodiment, the PLEM 10 is supported by the supporting portion 32 of the submarine structure installation jig 30 using the above-mentioned submarine structure installation jig 30, and the PLEM 10 is conveyed to the seabed 1 together with the submarine structure installation jig 30 ( (Transporting step), the jig body 31 of the submarine structure installation jig 30 is bottomed on the seabed 1, and the position of the PLEM 10 with respect to the pipeline 2 connected by the position adjusting mechanism 33 is adjusted (position adjusting step). 1 was fixed (fixing step), the seabed structure installation jig 30 was separated from the PLEM 10, and the seabed structure installation jig 30 was collected (collection step).
Therefore, when the jig body 31 bottoms on the seabed 1, the PLEM 10 supported by the jig body 31 instead of the crane does not sway and can be held in a stable state. The PLEM 10 can be held at a predetermined position by adjusting the position with respect to the pipeline 2 to be connected.
Furthermore, since the submarine structure installation jig 30 is removed from the PLEM 10 fixed to the seabed 1 and collected, it does not occupy the space around the PLEM 10 on the seabed 1, and the steel material of the submarine structure installation jig 30 is re-used. It can also be used.

本実施形態では、前述した海底構造物支持体20を用い、海底構造物支持体20を介してPLEM10を海底1に支持した。すなわち、PLEM10を海底構造物設置治具30の支持部32に支持する前に、PLEM10を支持体本体21に支持しておき、接続するパイプラインに対するPLEM10の位置を調整したのち、脚部22の高さを調整して海底1に着底させた。
従って、位置調整機構33により所定の位置(他の構造物であるパイプライン2との接続に必要な平面位置および水深)に配置されたPLEM10と、当該位置の海底1との離隔が変動しても、支持体本体21から下方へ突出する脚部22の高さ位置を調整することで、この脚部22により海底1に確実に着底させることができ、PLEM10を海底1の所定位置に安定状態で保持することができる。
In this embodiment, the above-mentioned submarine structure support 20 is used, and the PLEM 10 is supported on the submarine 1 via the submarine structure support 20. That is, before supporting the PLEM 10 on the support portion 32 of the submarine structure installation jig 30, the PLEM 10 is supported on the support body 21 and the position of the PLEM 10 with respect to the pipeline to be connected is adjusted, and then the leg portion 22 is moved. The height was adjusted and the bottom of the seabed 1 was reached.
Therefore, the distance between the PLEM 10 arranged at a predetermined position (plane position and water depth necessary for connection with the pipeline 2 which is another structure) and the seabed 1 at the position is changed by the position adjusting mechanism 33. Also, by adjusting the height position of the leg portion 22 projecting downward from the support body 21, the leg portion 22 can reliably land on the seabed 1, and the PLEM 10 can be stably placed at a predetermined position on the seabed 1. Can be held in a state.

なお、本発明は前述した実施形態に限定されるものではなく、本発明の目的を達成できる範囲での変形などは本発明に含まれる。
前記実施形態では、海底構造物としてPLEM10を設置したが、海底構造物はPLEM10に限らず、他の構造物であってもよく、例えばパイプライン2の設置に本発明の海底構造物設置治具、海底構造物支持体、および海底構造物設置方法を適用してもよい。
It should be noted that the present invention is not limited to the above-described embodiment, and modifications and the like within a range in which the object of the present invention can be achieved are included in the present invention.
Although the PLEM 10 is installed as the submarine structure in the above-described embodiment, the submarine structure is not limited to the PLEM 10 and may be another structure, for example, the submarine structure installation jig of the present invention for installing the pipeline 2. , The submarine structure support, and the submarine structure installation method may be applied.

前記実施形態では、海底構造物設置治具30の治具本体31あるいは海底構造物支持体20の支持体フレーム210を鋼材の架構体としたが、鋼材としてはH形鋼やC型鋼などの型鋼材が利用できるほか、鋼管などを利用してもよい。さらに、着底部313や脚部22の平板状部材222などは、鋼材を格子に組んだものに限らず、孔あき鋼板、網材や木製板などを用いてもよい。 In the above-described embodiment, the jig body 31 of the submarine structure installation jig 30 or the support frame 210 of the submarine structure support 20 is a frame structure made of steel, but the steel is a mold such as H-section steel or C-section steel. In addition to steel, steel pipe may be used. Further, the bottoming portion 313 and the flat plate-like member 222 of the leg portion 22 are not limited to those in which steel materials are assembled in a lattice, and perforated steel sheets, net materials, wooden boards, or the like may be used.

海底構造物支持体20に設置する脚部22の数および配置は、前記実施形態に限定されるものではなく、支持体フレーム210の形状、その元となる海底構造物の形状に応じて適宜設定すればよい。それぞれの脚部22に配置する柱状部材221の数も適宜選択してよく、例えば脚部22の中央に1本の柱状部材221を有する形態などとしてもよい。
脚部22を支持体本体21に対してスライド自在に支持する構造は、筒状部材223に限らず、支持体本体21に形成された垂直なガイドレールを用いて脚部22を昇降させてもよい。
The number and arrangement of the leg portions 22 installed on the submarine structure support body 20 are not limited to those in the above-described embodiment, and are appropriately set according to the shape of the support body frame 210 and the shape of the underlying seabed structure. do it. The number of the columnar members 221 arranged on each leg 22 may be appropriately selected, and for example, one columnar member 221 may be provided at the center of the leg 22.
The structure for slidably supporting the leg portion 22 with respect to the support body 21 is not limited to the tubular member 223, and the vertical guide rail formed on the support body 21 may be used to move the leg portion 22 up and down. Good.

海底構造物設置治具30の支持部32として懸垂ワイヤー321および横引ワイヤー322を用いたが、それぞれチェーンあるいはベルトなどを用いてもよく、可撓性のない棒材などで吊り下げるようにしてもよい。
位置調整機構33として懸垂ワイヤー321および横引ワイヤー322の長さ調整機構331,332を用いたが、ターンバックルのような懸垂ワイヤー321および横引ワイヤー322の途中に設けられるものに限らず、懸垂ワイヤー321および横引ワイヤー322の端部を巻き上げるジャッキあるいはウインチなどであってもよい。さらに、PLEM10の水平位置の調整には、横引ワイヤー322のような専ら引張り力を用いるものに限らず、棒材などを用いれば片側だけでもよい。
Although the suspension wire 321 and the horizontal pull wire 322 are used as the support portion 32 of the submarine structure installation jig 30, a chain or a belt may be used for each, and they may be hung with a non-flexible rod material. Good.
Although the length adjusting mechanisms 331 and 332 of the suspension wire 321 and the horizontal pulling wire 322 are used as the position adjusting mechanism 33, the suspension wire 321 and the horizontal pulling wire 322 are not limited to those provided in the middle of the suspension wire 321 and the horizontal pulling wire 322. It may be a jack or a winch that winds up the ends of the wire 321 and the pulling wire 322. Further, the horizontal position of the PLEM 10 is not limited to the one using the pulling force such as the horizontal pulling wire 322, and one side may be used as long as the rod material is used.

海底構造物設置治具30では、治具本体31に着底部313を設けて海底1に着底させたが、着底部313のような短冊状に限らず他の平面形状であってもよい。さらに、海底1が強固な地盤で海底構造物設置治具30の沈下が少ない場合は、着底部313は縮小ないし省略してもよい。
海底構造物設置治具30では、治具本体31として上面部311と一対の側面部312を有する門型フレーム310を用いたが、例えば側面部312が片側だけであってもよい。側面部312の海底1への着底部分を十分に広い面積とすることができれば、上面部311にかかるPLEM10および海底構造物支持体20の荷重でも側面部312が倒れないようにできる。
In the submarine structure installation jig 30, the bottom surface 313 is provided on the jig main body 31 and the bottom is attached to the sea bottom 1. However, the bottom surface 313 is not limited to the strip shape and may have another planar shape. Further, when the seabed 1 is a solid ground and the subsidence of the seabed structure installation jig 30 is small, the bottoming part 313 may be reduced or omitted.
In the submarine structure installation jig 30, the gate frame 310 having the upper surface portion 311 and the pair of side surface portions 312 is used as the jig main body 31, but the side surface portion 312 may be only on one side. If the bottom part of the side surface part 312 on the seabed 1 can be made sufficiently wide, the side surface part 312 can be prevented from falling down by the load of the PLEM 10 and the submarine structure support 20 applied to the upper surface part 311.

本発明は、海底構造物設置治具、海底構造物支持体、および海底構造物設置方法に利用できる。 INDUSTRIAL APPLICATION This invention can be utilized for the submarine structure installation jig, the submarine structure support body, and the submarine structure installation method.

1…海底、2…パイプライン、3…クレーン船、4…マリンホース、10…海底構造物であるPLEM、11…接続端、12…本管、13…分岐管、14…先端、20…海底構造物支持体、21…支持体本体、210…支持体フレーム、212,213…クランプ、22…脚部、221…柱状部材、222…平板状部材、223…筒状部材、224…外側ピン孔、225…内側ピン孔、226…ボルト、227…ダブルナット、228…脚部収納ワイヤー、30…海底構造物設置治具、31…治具本体、310…門型フレーム、311…上面部、312…側面部、313…着底部、314…吊下部、315…吊下ワイヤー、32…支持部、321…懸垂ワイヤー、322…横引ワイヤー、33…位置調整機構、331…調整機構、332…調整機構。 DESCRIPTION OF SYMBOLS 1... Seabed, 2... Pipeline, 3... Crane ship, 4... Marine hose, 10... PLEM which is a seabed structure, 11... Connection end, 12... Main pipe, 13... Branch pipe, 14... Tip, 20... Seabed Structure support, 21... Support body, 210... Support frame, 212, 213... Clamp, 22... Leg part, 221... Column member, 222... Plate member, 223... Cylindrical member, 224... Outer pin hole 225... Inner pin hole, 226... Bolt, 227... Double nut, 228... Leg storage wire, 30... Submarine structure installation jig, 31... Jig body, 310... Gate frame, 311... Top surface part, 312 ... Side surface part, 313... Bottom part, 314... Suspended part, 315... Suspended wire, 32... Support part, 321... Suspended wire, 322... Side pulling wire, 33... Position adjustment mechanism, 331... Adjustment mechanism, 332... Adjustment mechanism.

Claims (4)

海底に着底可能な治具本体と、海底構造物を支持した海洋構造物支持体を支持する支持部と、前記治具本体に対する前記海底構造物の位置を調整可能な位置調整機構と、を有し、
前記海洋構造物支持体は、海底構造物を支持する支持体本体と、前記支持体本体から下方へ突出する高さ位置調整可能で海底に着底可能な脚部と、を有することを特徴とする海底構造物設置治具。
And the jig body capable bottom landing on the seabed, and a support portion for supporting the offshore structure supporting member supporting the seabed structure, and a position adjusting mechanism capable of adjusting a position of the seabed structure for the jig body Have,
The offshore structure support includes a support body that supports a submarine structure, and a leg portion that protrudes downward from the support body and that can adjust a height position and can land on the seabed. Submarine structure installation jig.
請求項1に記載の海底構造物設置治具において、
前記治具本体は、鋼材で組まれた上面部と一対の側面部とを有する門型フレームであり、前記側面部の下部には海底に着底する平板状の脚部が設置され、
前記支持部は、前記上面部に前記海洋構造物支持体を介して前記海底構造物を吊り下げ支持する懸垂ワイヤーと、前記側面部と前記海底構造物を支持した前記海洋構造物支持体とを結ぶ横引ワイヤーと、を有し、
前記位置調整機構は、前記懸垂ワイヤーおよび前記横引ワイヤーの長さ調整機構で構成されることを特徴とする海底構造物設置治具。
The submarine structure installation jig according to claim 1,
The jig main body is a gate-shaped frame having an upper surface portion and a pair of side surface portions assembled from steel material, and a flat plate-shaped leg portion that bottoms on the seabed is installed at the lower portion of the side surface portions.
The support portion includes a suspension wire for supporting hanging the seabed structure through the marine structure support to the upper surface portion, and said marine structure support supporting the seabed structure and the side portions With a horizontal pulling wire to tie,
The position adjusting mechanism comprises a length adjusting mechanism for the suspension wire and the horizontal pulling wire.
請求項1または請求項2に記載の海底構造物設置治具において、
前記支持体本体は、鋼材で組まれた支持体フレームであり、
前記脚部は、前記支持体フレームに上下にスライド自在かつ所定高さで固定可能な柱状部材と、前記柱状部材に接続されて海底に着底可能な平板状部材と、を有することを特徴とする海底構造物設置治具
The submarine structure installation jig according to claim 1 or 2 ,
The support body is a support frame assembled of steel,
The leg portion includes a columnar member that is vertically slidable on the support frame and can be fixed at a predetermined height, and a flat plate-shaped member that is connected to the columnar member and can be attached to the seabed. Submarine structure installation jig .
海底に着底可能な治具本体と、海底構造物を支持する支持部と、前記治具本体に対する前記海底構造物の位置を調整可能な位置調整機構とを有する海底構造物設置治具を用いるとともに、前記海底構造物を支持する支持体本体と、前記支持体本体から下方へ突出する高さ位置調整可能で海底に着底可能な脚部と、を有する海底構造物支持体を用い、
前記海底構造物を前記支持部に支持する前に、前記海底構造物を前記支持体本体に支持しておき、
前記海底構造物を前記海底構造物設置治具の前記支持部に支持し、前記海底構造物設置治具とともに前記海底構造物を海底へ搬送し、
前記海底構造物設置治具の前記治具本体を海底に着底させ、前記位置調整機構で前記治具本体ないし海底に対する前記海底構造物の位置を調整し、
海底に対する前記海底構造物の位置を調整したのち、前記脚部の高さを調整して海底に着底させ、前記海底構造物支持体を介して前記海底構造物を海底に支持し、
前記海底構造物を海底に対して固定したのち、前記海底構造物から前記海底構造物設置治具を分離し、前記海底構造物設置治具を回収する、ことを特徴とする海底構造物設置方法。
A submarine structure installation jig having a jig body capable of bottoming on the seabed, a support portion for supporting the submarine structure, and a position adjusting mechanism capable of adjusting the position of the submarine structure with respect to the jig body is used. Together with a support main body that supports the submarine structure, a leg portion capable of adjusting the height position protruding downward from the support main body and capable of landing on the bottom of the sea, using a submarine structure support,
Before supporting the submarine structure on the support portion, the submarine structure is supported on the support body,
The submarine structure is supported by the supporting portion of the submarine structure installing jig, and the submarine structure is conveyed to the seabed together with the submarine structure installing jig,
The jig main body of the submarine structure installation jig bottoms on the seabed, and the position adjusting mechanism adjusts the position of the submarine structure with respect to the jig main body or the seabed,
After adjusting the position of the seabed structure with respect to the seabed, the height of the legs is adjusted to bottom the seabed, and the seabed structure is supported on the seabed via the seabed structure support ,
After fixing the seabed structure to the seabed, the seabed structure installation jig is separated from the seabed structure, and the seabed structure installation jig is recovered , characterized in that ..
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