JPWO2019207637A1 - Strength test method for underwater anchors - Google Patents

Strength test method for underwater anchors Download PDF

Info

Publication number
JPWO2019207637A1
JPWO2019207637A1 JP2019519353A JP2019519353A JPWO2019207637A1 JP WO2019207637 A1 JPWO2019207637 A1 JP WO2019207637A1 JP 2019519353 A JP2019519353 A JP 2019519353A JP 2019519353 A JP2019519353 A JP 2019519353A JP WO2019207637 A1 JPWO2019207637 A1 JP WO2019207637A1
Authority
JP
Japan
Prior art keywords
floating body
anchor
water
volume
strength test
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
Application number
JP2019519353A
Other languages
Japanese (ja)
Other versions
JP6554694B1 (en
Inventor
義栄 金城
義栄 金城
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ENVIRONMENTAL RESOURCE DEVELOPMENT CONSULTANT CORPORATION
Original Assignee
ENVIRONMENTAL RESOURCE DEVELOPMENT CONSULTANT CORPORATION
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ENVIRONMENTAL RESOURCE DEVELOPMENT CONSULTANT CORPORATION filed Critical ENVIRONMENTAL RESOURCE DEVELOPMENT CONSULTANT CORPORATION
Application granted granted Critical
Publication of JP6554694B1 publication Critical patent/JP6554694B1/en
Publication of JPWO2019207637A1 publication Critical patent/JPWO2019207637A1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/74—Means for anchoring structural elements or bulkheads
    • E02D5/80—Ground anchors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D33/00—Testing foundations or foundation structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/24—Anchors
    • B63B21/26—Anchors securing to bed
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B17/0017—Means for protecting offshore constructions

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Piles And Underground Anchors (AREA)

Abstract

水中に設置したアンカーの設置強度を簡素な構成で検査できるようにする。アンカー１１に対して、水面１２に浮いた浮体１３の上から引き上げ方向の力を加えて、浮体１３を水中に沈み込ませる。浮体１３の沈み込み体積を、必要な設置強度に見合った引き上げ力を作用させる値に設定して、アンカー１１が不動であることを確認する。必要な設置強度に見合った引き上げ力を作用させる浮体１３の沈み込み体積は、浮体１３に作用する浮力に基づいて算出する。The installation strength of anchors installed in water can be inspected with a simple configuration. A force in the pulling direction is applied to the anchor 11 from above the floating body 13 floating on the water surface 12 to sink the floating body 13 into the water. It is confirmed that the anchor 11 is immovable by setting the sinking volume of the floating body 13 to a value that applies a pulling force corresponding to the required installation strength. The sinking volume of the floating body 13 that applies a pulling force commensurate with the required installation strength is calculated based on the buoyancy force that acts on the floating body 13.

Description

この発明は、例えば水上に浮かべる太陽光発電装置や養殖生簀、浮桟橋、水上競技施設などの様々な被係留体を係留したりするためのアンカーが所望の引張強を有するか否か試験する、水中設置アンカーの強度試験方法に関する。   The present invention tests whether or not an anchor for mooring various moored objects such as a solar power generation device floating on the water, aquaculture cage, a floating pier, and a water sports facility has a desired tensile strength, The present invention relates to a strength test method for underwater installed anchors.

アンカーの設置状態を検査する方法として、下記特許文献１に開示されているものがある。   As a method of inspecting the installation state of the anchor, there is one disclosed in Patent Document 1 below.

この検査方法は、設置されたアンカーのロッド部を中空油圧ジャッキで引き上げて、油圧ゲージの示す荷重が所望の引き抜き耐力の値に至ることを確認するというものである。油圧ジャッキは、水面に浮く台船の下方で水底に接地する引上げ構造体に備えられている。   In this inspection method, the rod portion of the installed anchor is pulled up by a hollow hydraulic jack and it is confirmed that the load indicated by the hydraulic gauge reaches a desired pull-out proof value. The hydraulic jack is provided in a lifting structure that is grounded to the bottom of the water below the barge floating on the water surface.

しかし、台船のほかに、水底に接地する引上げ構造体が必要であるとともに、この引上げ構造体に中空油圧ジャッキを備えるための構造も不可欠であって、検査のための装置が大掛かりである。   However, in addition to the barge, a pulling structure to be grounded on the bottom of the water is required, and a structure for providing the pulling structure with a hollow hydraulic jack is also indispensable, which requires a large-scale inspection device.

特許第６２５２８８２号公報Japanese Patent No. 6252882

この発明は、より簡素な構成で検査が行えるようにすることを主な目的とする。   The main object of the present invention is to enable inspection with a simpler configuration.

そのための手段は、水中に設置されたアンカーに対して、水面に浮いた浮体の上から引き上げ方向の力を加えて、前記浮体を水中に沈み込ませ、前記浮体の沈み込み体積を、必要な設置強度に見合った引き上げ力を作用させる値に設定して、前記アンカーが不動であることを確認する水中設置アンカーの強度試験方法である。   Means for that, to the anchor installed in the water, by applying a force in the pulling direction from above the floating body floating on the water surface, to sink the floating body into the water, the sinking volume of the floating body, It is a strength test method for an underwater installation anchor, which is set to a value for applying a pulling force corresponding to the installation strength and confirms that the anchor is immovable.

必要な設置強度に見合った引き上げ力を作用させる浮体の沈み込み体積は、浮体に作用する浮力に基づいて算出される。   The sinking volume of the floating body that applies a pulling force commensurate with the required installation strength is calculated based on the buoyancy force that acts on the floating body.

この構成では、浮体の上からアンカーを引っ張って、浮体における水面より上に位置する部分を水中に沈み込ませて、アンカーに対して必要な設置強度に見合った引き上げ力を作用させても、アンカーの設置状態が維持できれば設置強度を有すると判断され、維持できなければ強度不足と判断される。強度不足の場合には、アンカーが引っ張り上げられることになるので浮体にはそのことが見た目にも動作にも明瞭に反映される。   With this configuration, even if the anchor is pulled from above the floating body and the part of the floating body located above the water surface is submerged, and the pulling force corresponding to the required installation strength acts on the anchor, If the installation state of can be maintained, it is determined that the installation has strength, and if it cannot be maintained, the strength is insufficient. If the strength is insufficient, the anchor will be pulled up, and this will be clearly reflected in the appearance and movement of the floating body.

この発明によれば、設置済みのアンカーを浮体の上から引っ張ることによって浮体を所定体積だけ水中に沈み込ませることで検査が行え、作業は簡単である。しかもそのための装置は少なくとも浮体と浮体の沈み込み体積を判断する装置があればよく、至極簡素に構成できる。   According to the present invention, by pulling the installed anchor from above the floating body, the floating body is submerged in the water by a predetermined volume, so that the inspection can be performed and the work is simple. Moreover, a device therefor needs at least a device for judging the floating body and the sinking volume of the floating body, and can be constructed extremely simply.

水中設置アンカーの強度試験方法を示す説明図。Explanatory drawing which shows the strength test method of the underwater installation anchor. 浮体の斜視図。The perspective view of a floating body. 沈み込み深さと沈み込み体積を説明する説明図。Explanatory drawing explaining the subduction depth and the subduction volume. アンカーの設置方法を示す説明図。Explanatory drawing which shows the installation method of an anchor.

この発明を実施するための一形態を、以下図面を用いて説明する。   An embodiment for carrying out the present invention will be described below with reference to the drawings.

図１に、水中設置アンカーの強度試験方法を示す。すなわち、この試験方法は、埋め込みや打込みによって水中に設置されたアンカー１１に対して、水面１２に浮いた浮体１３の上から引き上げ方向の力、換言すれば鉛直上向きの力を加えて、浮体１３を水中に沈み込ませる。このときの沈み込み量、つまり沈み込み体積を必要な設置強度に見合った引き上げ力を作用させる値に設定する。そしてアンカー１１が不動であることを確認する、というものである。アンカー１１が不動であれば試験は合格、アンカー１１が引き抜き方向に動いてしまえば試験は不合格と判断される。   FIG. 1 shows a strength test method of an underwater installed anchor. That is, in this test method, a force in the pulling direction, in other words, a vertically upward force, is applied to the anchor 11 installed in the water by embedding or driving, and the floating body 13 is floated on the water surface 12. Sink into the water. At this time, the amount of sinking, that is, the sinking volume is set to a value at which a pulling force corresponding to the required installation strength is applied. Then, it is confirmed that the anchor 11 is immovable. If the anchor 11 does not move, the test passes. If the anchor 11 moves in the pull-out direction, the test fails.

この方法を実現するためには、前述の浮体１３が必要である。浮体１３は、水面上に浮く、つまり浮体１３の下面部分が水面下に沈むものの、上面を含む部分が水面上に出ており、アンカー１１を前述の所定の力で引っ張る力を上から加えても浮体１３の全体が水面下に沈み込まない浮力が作用するものである。   In order to realize this method, the above-mentioned floating body 13 is required. The floating body 13 floats above the water surface, that is, although the lower surface portion of the floating body 13 sinks below the water surface, the portion including the upper surface is exposed above the water surface, and a force for pulling the anchor 11 with the above-mentioned predetermined force is applied from above. Also, buoyancy acts so that the entire floating body 13 does not sink below the water surface.

図２は、その浮体１３の一例を示す斜視図である。浮体１３は、発泡スチロールを用いて形成された平面視方形の厚板状であり、発泡スチロールからなる浮板部３１と、浮板部３１の上面に敷設された金属板などからなる硬質の保護板部３２で構成されている。浮板部３１は、厚板状の発泡スチロール板を組み合わせて中実に構成される。   FIG. 2 is a perspective view showing an example of the floating body 13. The floating body 13 is a thick plate having a rectangular shape in plan view formed by using Styrofoam, and is a hard protection plate unit made of a Styrofoam floating plate portion 31 and a metal plate laid on the upper surface of the floating plate portion 31. It is composed of 32. The floating plate portion 31 is solidly formed by combining a thick styrofoam plate.

浮体１３は、水中に対する沈み込み深さ又は沈み込み体積を示すゲージ３３を備えている。ゲージ３３は、沈み込み深さを示すものとする方が簡素に構成できるので良い。   The floating body 13 is provided with a gauge 33 that indicates a submerged depth or submerged volume with respect to water. It is preferable that the gauge 33 be one that indicates the depth of depression because the gauge 33 can be simply configured.

図２に例示したゲージ３３は、上下方向、つまり浮体１３の厚み方向の長さ（高さ）を示す目盛を備えた目盛板３４である。目盛板３４の固定位置は適宜設定されるが、例えば４つの角部分に形成されるとよい。見やすいうえに、目盛板３４を硬質の材料で構成すれば、浮体１３の角部を保護することもできる。   The gauge 33 illustrated in FIG. 2 is a scale plate 34 having a scale indicating the length (height) in the vertical direction, that is, the thickness direction of the floating body 13. Although the fixed position of the scale plate 34 is appropriately set, it is preferable that the scale plate 34 is formed at four corner portions, for example. In addition to being easy to see, if the scale plate 34 is made of a hard material, the corners of the floating body 13 can be protected.

ここで、必要な設置強度に見合った引き上げ力を作用させる浮体１３の沈み込み体積について図３を用いて説明する。   Here, the sinking volume of the floating body 13 that applies a pulling force corresponding to the required installation strength will be described with reference to FIG.

浮体１３に働く浮力の大きさは、重力加速度をｇ［ｍ／ｓ２］、水の密度ρ［ｋｇ／ｍ３］とし、浮体１３における水面１２より下に沈んだ部分の体積をＶ［ｍ３］とした場合、
浮体１３に働く浮力の大きさはρＶｇ［Ｎ］となる。The magnitude of the buoyancy acting on the floating body 13 is gravitational acceleration g [m / s 2 ] and water density ρ [kg / m 3 ], and the volume of the portion of the floating body 13 that sinks below the water surface 12 is V [m 3 ]
The magnitude of the buoyancy acting on the floating body 13 is ρVg [N].

質量ｍ［ｋｇ］の浮体１３には重力もはたらき、その大きさｍｇ［Ｎ］は浮力と釣り合う（ρＶｇ＝ｍｇ）ことから、
水面下に沈んだ部分の体積をＶは、
Ｖ＝ｍ／ρ
となって、浮体１３は水面下にｍ／ρ［ｍ３］沈んでいることが判る。Gravity also acts on the floating body 13 having a mass of m [kg], and its size mg [N] balances with buoyancy (ρVg = mg).
V is the volume of the submerged part
V = m / ρ
Therefore, it is understood that the floating body 13 is submerged m / ρ [m 3 ] below the water surface.

そして、浮力は水面下に沈み込んでいる体積に比例するので、必要な設置強度に見合った引き上げ力をもたらすのに必要な沈み込み体積Ｖ１［ｍ３］が得られ、その沈み込み体積と浮体１３の大きさから、例えば２ｔ（トン）の引き上げ力をもたらすには１０ｃｍなどと、浮体１３における沈み込み深さＨが得られる。And since the buoyancy is proportional to the volume submerged below the surface of the water, the subduction volume V1 [m 3 ] required to provide the pulling force commensurate with the required installation strength can be obtained. From the size of 13, the subduction depth H in the floating body 13 can be obtained, for example, 10 cm to provide a pulling force of 2 t (ton).

浮体１３には、水中に設置されたアンカー１１を引っ張るための装置が必要であるが、アンカー１１を引っ張る装置には、図１に仮想線で示したように、油圧ショベルなどの建設機械１５を用いる。建設機械１５はアームの先端に杭打ちアタッチメント１６を取り付けて使用される。   The floating body 13 needs a device for pulling the anchor 11 installed in the water, but as the device for pulling the anchor 11, a construction machine 15 such as a hydraulic excavator is used as shown by a phantom line in FIG. To use. The construction machine 15 is used with a pile driving attachment 16 attached to the tip of the arm.

杭打ちアタッチメント１６を取り付けた建設機械１５は、図４に示したように、アンカー１１の打込みや埋設にも使用されるものである。そしてこの建設機械１５を水上に位置させる作業用台船１７として、前述の浮体１３が使用される。つまり強度試験に用いられる浮体１３は、アンカー１１を設置する際に使用した作業用台船１７でもある。   The construction machine 15 to which the pile driving attachment 16 is attached is also used for driving and burying the anchor 11, as shown in FIG. The floating body 13 described above is used as a work platform 17 for positioning the construction machine 15 on the water. That is, the floating body 13 used for the strength test is also the work pontoon 17 used when the anchor 11 is installed.

このような浮体１３と建設機械１５を用いたアンカー１１の設置強度試験は、アンカー１１の設置と一連の流れで行われる。   The installation strength test of the anchor 11 using the floating body 13 and the construction machine 15 is performed by installing the anchor 11 and a series of steps.

すなわち、作業用台船１７としても用いられる浮体１３に建設機械１５を乗せて、浮体１３を水上におけるアンカー設置位置に曳航する。そこで、図４に示したように、建設機械１５にアンカー１１の上端部を保持させて、アンカー１１を水底１８に打ち込んで、アンカー１１の設置を完了する。   That is, the construction machine 15 is placed on the floating body 13, which is also used as the work pontoon 17, and the floating body 13 is towed to the anchor installation position on the water. Therefore, as shown in FIG. 4, the construction machine 15 is caused to hold the upper end portion of the anchor 11 and the anchor 11 is driven into the water bottom 18 to complete the installation of the anchor 11.

このあと、アンカー１１の上端部を保持した状態のまま、建設機械１５でアンカー１１を引っ張る。すると、アンカー１１は水底１８に打ち込まれているので容易に引き抜かれることはなく、図１に実線で示したように、浮体１３における水面１２より上に出ていた部分が水面下に沈み込む。   After that, the anchor 11 is pulled by the construction machine 15 while the upper end of the anchor 11 is held. Then, since the anchor 11 is driven into the water bottom 18, the anchor 11 is not easily pulled out, and as shown by the solid line in FIG. 1, the portion of the floating body 13 that is above the water surface 12 sinks below the water surface.

この沈み込みでは、引っ張りにより沈み込むことになる沈み込み体積を前述した所定の引き上げ力を作用させる値にするが、浮体１３の沈み込み体積は浮体１３に備えたゲージ３３で判定する。   In this sinking, the sinking volume that is to be sinked by pulling is set to a value for applying the predetermined pulling force described above, but the sinking volume of the floating body 13 is determined by the gauge 33 provided in the floating body 13.

具体的には、沈み込み前の水面１２の位置をゲージ３３としての目盛板３４で確認しておき、例えば設置強度に見合った引き上げ力として２ｔ（トン）を作用させるための沈み込み深さが１０ｃｍだとした場合、沈み込み前の水面１２の位置から１０ｃｍ沈み込むまで、アンカー１１に引き上げ力を加える。目盛板３４の確認は、浮体１３の上から行ってもよいが、アンカー１１の設置には水中に入るダイバーも要るので、ダイバーに行わせることができる。   Specifically, the position of the water surface 12 before subduction is confirmed by a scale plate 34 as a gauge 33. For example, the subduction depth for applying 2t (ton) as a pulling force corresponding to the installation strength is In the case of 10 cm, a pulling force is applied to the anchor 11 from the position of the water surface 12 before subduction until the subsidence is 10 cm. The graduation plate 34 may be checked from above the floating body 13, but since the diver who enters the water is also required to install the anchor 11, the diver can be checked.

目盛板３４が沈み込み深さを認識させる目盛を有するものであるので、アンカー１１に引上げ力を加えた際に浮体１３が傾く場合であっても、４つの角部に備えた目盛板３４の目盛から各部の沈み込み深さを知ることができ、所定の沈み込み体積を容易に算出することができる。   Since the scale plate 34 has a scale that allows the sinking depth to be recognized, even when the floating body 13 tilts when a pulling force is applied to the anchor 11, the scale plate 34 provided at the four corners The subduction depth of each part can be known from the scale, and a predetermined subduction volume can be easily calculated.

沈み込み深さが所定深さに達してから、その状態を適宜の時間継続する。つまり、浮体１３の沈み込みを、所定の沈み込み体積の状態で継続する。継続する時間は、アンカー１１の用途や必要な設置強度、水中環境などによって適宜設定されるが、いたずらに長くする必要はなく、必要な設置強度を確認できる、例えば数分から十数分、好ましくは５分程度でよい。   After the subduction depth reaches a predetermined depth, the state is continued for an appropriate time. That is, the sinking of the floating body 13 is continued with a predetermined sinking volume. The duration to be continued is appropriately set depending on the use of the anchor 11, required installation strength, underwater environment, etc., but need not be unnecessarily long and the required installation strength can be confirmed, for example, from a few minutes to a dozen minutes, preferably 5 minutes is enough.

アンカー１１を引っ張り続けた結果、アンカー１１が不動であれば、試験は合格であり、アンカー１１が持ち上がるようであれば、試験は不合格であって、即座に、アンカー１１を設置し直す。アンカー１１の設置が不十分な場合には、アンカー１１が持ち上がるので、水中で作業するダイバーが見てもわかるうえに、建設機械１５を操作している作業員にも、機械に表示されるデジタル数字ではなく感覚を通じて容易に確認できる。   If the anchor 11 is immovable as a result of continuing to pull the anchor 11, the test is passed, and if the anchor 11 is lifted, the test is failed and the anchor 11 is immediately re-installed. When the installation of the anchor 11 is insufficient, the anchor 11 is lifted, so that the diver working underwater can see it, and also the worker who is operating the construction machine 15 can display the digital signal on the machine. It can be easily confirmed through the senses, not the numbers.

以上のように、アンカー１１を浮体１３の上から引っ張ることによって浮体１３を所定体積だけ水中に沈み込ませることで検査が行え、作業は簡単である。浮体１３の沈み込み体積は浮体１３に備えたゲージ３３で判定するので、ゲージ３３を確認しながらアンカー１１を引っ張ればよく、この点でも作業は容易である。   As described above, by pulling the anchor 11 from above the floating body 13, the floating body 13 is submerged in the water by a predetermined volume for inspection, and the work is simple. Since the sinking volume of the floating body 13 is determined by the gauge 33 provided in the floating body 13, it is sufficient to pull the anchor 11 while checking the gauge 33, and the work is easy in this respect as well.

しかも、そのための装置は、ゲージ３３を備えた浮体１３があればよく、前述のように建設機械１５を用いてアンカー１１の引っ張りを行うので、アンカー１１を引っ張るための専用の装置（図示せず）を固定的に備えずともよい。このため浮体１３の構成の簡素化を図れ、ひいては試験に必要な装置全体の簡素化が図れる。   Moreover, the device for that purpose only needs to have the floating body 13 provided with the gauge 33. Since the anchor 11 is pulled by using the construction machine 15 as described above, a dedicated device (not shown) for pulling the anchor 11 is used. ) May not be fixedly provided. Therefore, the structure of the floating body 13 can be simplified, and by extension, the entire device required for the test can be simplified.

特に、浮体１３はアンカー１１を設置する際に使用した作業用台船１７でもあるので、より一層の簡素化・単純化を図れる。   In particular, since the floating body 13 is also the work platform 17 used when the anchor 11 is installed, the simplification and simplification can be achieved.

また、アンカー１１の設置から設置強度の試験までを一連に行えるので、作業性が極めて良く、設置後に時間をおいて検査する場合に比べて、設置強度の信ぴょう性を高められる。   Further, since the installation of the anchor 11 and the test of the installation strength can be performed in series, the workability is extremely good, and the reliability of the installation strength can be enhanced as compared with the case where the inspection is performed after a long time after installation.

信ぴょう性の高さは、設置強度試験における浮体１３の沈み込みを、所定値の沈み込み体積の状態にするだけではなく、その状態で継続することによって増長される。   The high reliability is increased not only by making the sinking of the floating body 13 in the installation strength test a state of the sinking volume of a predetermined value, but also by continuing in that state.

以上の構成はこの発明を実施するための一形態の構成であって、この発明は前述の構成のみに限定されるものではなく、その他の構成を採用することもできる。   The above configuration is one configuration for carrying out the present invention, and the present invention is not limited to the above configuration, and other configurations can be adopted.

ゲージ３３としては、前述のように沈み込み深さが認識できる目盛を有するもののほか、例えば水面１２に浮くフロートを備えて現実に沈み込んだ深さを、目盛を媒介にせずに感覚的に認識できる機構を有する装置など、他の構成であってもよい。ほかに、水中に沈んだ部分を外観の変化で示す部材を用いてゲージ３３を構成することもできる。   As the gauge 33, in addition to the one having a scale capable of recognizing the subduction depth as described above, for example, a float floating on the water surface 12 is provided to sensuously recognize the actual depth of the subduction without interposing the scale. Other configurations such as a device having a mechanism capable of performing the above may be used. In addition, the gauge 33 can be configured using a member that shows a submerged portion by a change in appearance.

１１…アンカー
１２…水面
１３…浮体
１７…作業用台船
３３…ゲージ11 ... Anchor 12 ... Water surface 13 ... Floating body 17 ... Work berth 33 ... Gauge

Claims (6)

水中に設置されたアンカーに対して、水面に浮いた浮体の上から引き上げ方向の力を加えて、前記浮体を水中に沈み込ませ、
前記浮体の沈み込み体積を、必要な設置強度に見合った引き上げ力を作用させる値に設定して、前記アンカーが不動であることを確認する
水中設置アンカーの強度試験方法。With respect to the anchor installed in the water, applying a force in the pulling direction from above the floating body floating on the water surface, sink the floating body into the water,
A strength test method for an underwater installed anchor, wherein the submerged volume of the floating body is set to a value for applying a pulling force corresponding to a required installation strength to confirm that the anchor is immovable. 前記浮体の沈み込みを、前記値の沈み込み体積の状態で継続する
請求項１に記載の水中設置アンカーの強度試験方法。The strength test method for an underwater installed anchor according to claim 1, wherein the sinking of the floating body is continued in the state of the sinking volume having the value. 前記浮体の沈み込み体積を前記浮体に備えたゲージで判定する
請求項１または請求項２に記載の水中設置アンカーの強度試験方法。The strength test method for an underwater installed anchor according to claim 1 or 2, wherein the sinking volume of the floating body is determined by a gauge provided in the floating body. 前記浮体として、前記アンカーを設置する際に使用した作業用台船を用いる
請求項１から請求項３のうちいずれか一項に記載の水中設置アンカーの強度試験方法。The strength test method for an underwater installation anchor according to any one of claims 1 to 3, wherein the work platform used when installing the anchor is used as the floating body. 水中に設置されたアンカーに対して設置強度試験を行うための水面に浮く浮体であって、
水中に対する沈み込み深さ又は沈み込み体積を示すゲージを備えた
浮体。A floating body that floats on the water surface to perform an installation strength test on an anchor installed in water,
A floating body with a gauge that indicates the depth or volume of subduction into water. 発泡スチロールを用いて形成された
請求項５に記載の浮体。The floating body according to claim 5, which is formed by using expanded polystyrene.
JP2019519353A 2018-04-24 2018-04-24 Strength test method for underwater anchors Active JP6554694B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2018/016556 WO2019207637A1 (en) 2018-04-24 2018-04-24 Strength testing method for underwater anchor, and floating body

Publications (2)

Publication Number Publication Date
JP6554694B1 JP6554694B1 (en) 2019-08-07
JPWO2019207637A1 true JPWO2019207637A1 (en) 2020-04-30

Family

ID=67539856

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2019519353A Active JP6554694B1 (en) 2018-04-24 2018-04-24 Strength test method for underwater anchors

Country Status (4)

Country Link
US (1) US20210002847A1 (en)
JP (1) JP6554694B1 (en)
TW (1) TWI760516B (en)
WO (1) WO2019207637A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114894624B (en) * 2022-07-14 2022-11-01 浙大城市学院 Drawing force measurement test device and method based on marine pipeline group anchor effect

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5934315A (en) * 1982-08-19 1984-02-24 Fujita Corp Marine structure
JPH0411595A (en) * 1990-04-27 1992-01-16 Nkk Corp Measurement of draft line
CN100387783C (en) * 2003-02-28 2008-05-14 默代克国际有限公司 Method of installation of a tension leg platform
US7891909B2 (en) * 2008-10-10 2011-02-22 Horton Deepwater Development Systems, Inc. Semi-submersible offshore structure
AU2014224153B8 (en) * 2014-07-09 2015-07-02 Woodside Energy Technologies Pty Ltd System and method for heading control of a floating lng vessel using a set of real-time monitored hull integrity data
CN205475167U (en) * 2016-03-23 2016-08-17 中交第三航务工程勘察设计院有限公司 Shallow sea territory in situ test survey platform
CN106013143B (en) * 2016-05-20 2019-01-29 中铁十六局集团地铁工程有限公司 A kind of construction of underground engineering anti-floating system anchor pole and construction method

Also Published As

Publication number Publication date
JP6554694B1 (en) 2019-08-07
WO2019207637A1 (en) 2019-10-31
TWI760516B (en) 2022-04-11
US20210002847A1 (en) 2021-01-07
TW201945245A (en) 2019-12-01

Similar Documents

Publication Publication Date Title
RU2375247C1 (en) Method and device to reboard underwater equipment
CN106908045B (en) It is a kind of to deform long-term observation device from brill cable-free type seabed
Bridge et al. Full-scale model tests of a steel catenary riser
El-Sherbiny Performance of suction caisson anchors in normally consolidated clay
Lieng et al. Deep penetrating anchor: Subseabed deepwater anchor concept for floaters and other installations
O’Beirne et al. A release-to-rest model for dynamically installed anchors
CN106394810A (en) Dynamic penetration anchor plate-based ultimate penetration depth determination device
KR101877037B1 (en) A positioning device of mooring anchor for model test and a method thereof
JPWO2019207637A1 (en) Strength test method for underwater anchors
CN1186503C (en) Method for positioning whole floatation transported steel caisson by pre-exerting tension at anchor pier and being drilling platform
US4497594A (en) Offshore structure and method of sinking same
KR101793231B1 (en) Transferable embodiment on water reduced resistance to wave force
RU2404081C1 (en) Method for installation of submerged oceanologic float
CN203921138U (en) Buoyancy aid work pile
CN108426624B (en) Floating ball liquid level device for measuring concrete liquid level of cast-in-place pile foundation and using method thereof
JP2005186752A (en) Spar buoy for wave-crushing shallow sea area
KR101854268B1 (en) Offshore structure
Chang Centrifuge modelling and numerical analysis on dynamically installed anchors for floating offshore platforms
Gill Developments in Ocean Facilities Engineering
Castillo Garcia et al. Effect of Seabed Trenching on Holding Capacity of Suction Anchors in Deepwater Gulf of Guinea Clays: A Numerical Study
JP2002081048A (en) Soft landing bottom-type ocean rig
JP2018109343A (en) Inspection method of pivot anchor, and maintenance method of on-water solar power generation system
Han et al. Experimental Study on Gravity Anchor for Optimum Design of Shear Key
JP6067360B2 (en) Tsunami attenuation device
KR101690744B1 (en) Fixed offshore-structure and installation method of the same

Legal Events

Date Code Title Description
A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20190409

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20190409

A871 Explanation of circumstances concerning accelerated examination

Free format text: JAPANESE INTERMEDIATE CODE: A871

Effective date: 20190409

A975 Report on accelerated examination

Free format text: JAPANESE INTERMEDIATE CODE: A971005

Effective date: 20190423

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20190514

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20190613

R150 Certificate of patent or registration of utility model

Ref document number: 6554694

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250