JP2017201094A - Movement prevention body of scour-prevention material and laying method of scour-prevention material - Google Patents

Movement prevention body of scour-prevention material and laying method of scour-prevention material Download PDF

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JP2017201094A
JP2017201094A JP2016092941A JP2016092941A JP2017201094A JP 2017201094 A JP2017201094 A JP 2017201094A JP 2016092941 A JP2016092941 A JP 2016092941A JP 2016092941 A JP2016092941 A JP 2016092941A JP 2017201094 A JP2017201094 A JP 2017201094A
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prevention material
scouring prevention
scouring
scour
water
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JP6865455B2 (en
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谷 勇 太 関
Yuta Sekiya
谷 勇 太 関
川 祐 介 石
Yusuke Ishikawa
川 祐 介 石
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Nakada Industrial Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a movement prevention body of scour-prevention material capable of preventing movement of scour-prevention material.SOLUTION: The movement prevention body of the scour-prevention material includes: a scour-prevention material 1 which is laid on the water bottom under a base part 11 of a structure 10; and a water-permeable weight 2 which is attached to the end at the off coast side of the scour-prevention material 1.SELECTED DRAWING: Figure 1

Description

本発明は、洗掘防止材の移動防止体及び洗掘防止材の敷設方法に係り、特に、洗掘防止材の移動防止を図った洗掘防止材の移動防止体及び洗掘防止材の敷設方法に関する。     The present invention relates to a scouring prevention material movement prevention body and a scouring prevention material laying method, and more particularly, a scouring prevention material movement prevention body and a scouring prevention material laying which are intended to prevent movement of the scouring prevention material. Regarding the method.

従来、構造物の基礎部分の水底に敷設された洗掘防止マットの沖側の端部に錘を取り付け、洗掘防止マットのめくれ等による移動防止を図ったものがある（例えば、特許文献１参照）。     Conventionally, there is one in which a weight is attached to the end of the scouring prevention mat laid on the bottom of the foundation of the structure to prevent movement by turning up the scouring prevention mat (for example, Patent Document 1). reference).

特開２００９−８４８０４号公報JP 2009-84804 A

しかしながら、上記の洗掘防止マットにあっては、大きな波浪があると、それに伴って、大きな揚圧力が洗掘防止マットの端部に取り付けられた錘に作用して、洗掘防止マットの先端が持ち上げられて、洗掘防止マットがめくれ等移動して洗掘防止マットが破損するという問題点が生じた。     However, in the scouring prevention mat described above, if there is a big wave, a large lifting pressure acts on the weight attached to the end of the scouring prevention mat, and accordingly, the tip of the scouring prevention mat. As a result, the scouring prevention mat is turned over, and the scouring prevention mat is damaged.

本発明は、上記実情を考慮してなされた洗掘防止材の移動防止体及び洗掘防止材の敷設方法を提供することを目的とする。     An object of this invention is to provide the movement prevention body of the scouring prevention material made | formed in consideration of the said situation, and the laying method of a scouring prevention material.

請求項１記載の洗掘防止材の移動防止体は、構造物の基礎部分の水底に敷設された洗掘防止材と、この洗掘防止材の沖側の端部に取り付けられた透水性の錘とを備えているものである。     The movement preventing body of the scouring prevention material according to claim 1 includes a scouring prevention material laid on the bottom of the foundation of the structure, and a water permeable attachment attached to an offshore side end of the scouring prevention material. And a weight.

また、請求項２記載の洗掘防止材の移動防止体は、請求項１記載の洗掘防止材の移動防止体において、洗掘防止材が透水性の洗掘防止用マットである。     According to a second aspect of the present invention, there is provided the anti-migration body for scouring prevention material according to the first aspect, wherein the scouring prevention material is a water-permeable scouring prevention mat.

また、請求項３記載の洗掘防止材の敷設方法は、防波堤等の構造物の基礎部分を保護するために、前記基礎部分の水底に洗掘防止材を敷設する洗掘防止材の敷設方法であって、沖側の端部に取り付けられた透水性の錘を有する洗掘防止材を前記水底に敷設する敷設工程と、この敷設工程の後、沖側から遠い側の前記洗掘防止材の端部を前記水底に固定する固定工程と、この固定工程の後、前記洗掘防止材の上に前記基礎部分を形成する基礎形成工程と、この基礎形成工程の後、前記基礎部分の上に、前記構造物を形成する構造物形成工程とを備えているものである。     The scouring prevention material laying method according to claim 3 is a scouring prevention material laying method in which a scouring prevention material is laid on the bottom of the foundation portion in order to protect a foundation portion of a structure such as a breakwater. The scouring prevention material having a water-permeable weight attached to the end of the offshore side is laid on the water bottom, and after the laying step, the scouring prevention material on the side far from the offshore side A fixing step for fixing the end of the base to the water bottom, a base forming step for forming the base portion on the scouring prevention material after the fixing step, and a base forming step after the base forming step. And a structure forming step for forming the structure.

請求項１記載の洗掘防止材の移動防止体によれば、透水性の錘で、錘内を海水が通過するため、波浪による揚圧力が軽減され、洗掘防止材の先端が持ち上げられて、洗掘防止材が移動して、破損することが防止され、洗掘防止材の機能を保持することができる。     According to the anti-movement body of the scouring prevention material according to claim 1, since seawater passes through the weight with a water-permeable weight, the lifting pressure due to waves is reduced, and the tip of the scouring prevention material is lifted. The scouring prevention material can be prevented from moving and being damaged, and the function of the scouring prevention material can be maintained.

また、請求項２記載の洗掘防止材の移動防止体によれば、上述した請求項１記載の発明の効果に加え、洗掘防止材が透水性の洗掘防止用マットであるため、洗掘防止用マットが不透水性に比べ、洗掘防止用マットを海水が通過する分、波浪による揚圧力が軽減され、洗掘防止用マットが持ち上げられて、破損等することが防止され、洗掘防止用マットの機能を保持することができる。      Further, according to the anti-migration body for the scouring prevention material according to claim 2, in addition to the effect of the invention according to claim 1, the scouring prevention material is a permeable scouring prevention mat. Compared to impervious water, the digging prevention mat reduces the lifting pressure due to the waves as seawater passes through the scouring prevention mat, and the scouring prevention mat is lifted and prevented from being damaged. The function of the anti-dig mat can be maintained.

また、請求項３記載の洗掘防止材の敷設方法によれば、沖側の端部に取り付けられた透水性の錘を有する洗掘防止材を前記水底に敷設する敷設工程を有するため、透水性の錘を利用して、洗掘防止材の沖側の端部を所定位置に容易に保持させ、洗掘防止材の敷設工事を容易にすることができる。     Further, according to the scouring prevention material laying method according to claim 3, since the scouring prevention material having a permeable weight attached to an offshore side end is laid on the water bottom, The end of the scouring prevention material on the offshore side can be easily held at a predetermined position by using the sexual weight, thereby facilitating the construction work of the scouring prevention material.

図１は、本発明の一実施例の洗掘防止材の移動防止体の概略的断面図である。FIG. 1 is a schematic cross-sectional view of a scour preventing material movement preventing body according to an embodiment of the present invention. 図２は、図１の透水性の錘の概略的斜視図である。FIG. 2 is a schematic perspective view of the water-permeable weight of FIG.

本発明の一実施例の洗掘防止材の移動防止体及び洗掘防止材の敷設方法を図面を参照して説明する。
洗掘防止材の移動防止体は、構造物１０の基礎部分１１の水底に敷設された洗掘防止材（洗掘防止材は、例えば、洗掘防止用マット）１と、この洗掘防止材１の沖側の端部に取り付けられた透水性の錘２とを備えている。
図２に示す２１は、連結部で、透水性の錘２と洗掘防止材１とは、図示しないが、ファスナー、ロープ、穴あきベルト等の連結部材を使用して連結部２１を介して接続する。 A scouring prevention material movement preventing body and a scouring prevention material laying method according to an embodiment of the present invention will be described with reference to the drawings.
The movement preventing body of the scouring prevention material is a scouring prevention material (for example, a scouring prevention mat is a scouring prevention mat) 1 laid on the bottom of the base portion 11 of the structure 10 and the scouring prevention material. 1 and a water-permeable weight 2 attached to the end of the offshore side.
2 shown in FIG. 2 is a connecting portion, and the water-permeable weight 2 and the scouring prevention material 1 are not shown, but using connecting members such as fasteners, ropes, perforated belts, etc. Connecting.

構造物１０は、例えば、突堤、人工リーフ、護岸堤等である。洗掘防止材（洗掘防止材は、例えば、洗掘防止用マット）１は、洗掘防止材１の下の砂等が波浪による洗掘を防止するもので、例えば、アスファルト系、合成繊維、合成樹脂、幌布等で形成され、透水性、不透水性のものがある。
また、透水性の錘２は、例えば、図２に示すように、網篭［網篭は、例えば、２ｍ×２ｍ×０．５ｍの略直方体形状］内に中詰め石（充填する石の粒径は、例えば、５０ｍｍ〜１５０ｍｍ、２００ｍｍ〜３０００ｍｍ等）、ブロック状のコンクリートに穴を開けたもの等である。
上述した実施例の洗掘防止材１の例として、洗掘防止用マットを示したが、本願発明にあっては、これに限らず、洗掘防止材１として、図示しないが、袋体に中詰め石を充填したもの、網篭に中詰め石を充填したもの等でも良い。 The structure 10 is, for example, a jetty, an artificial reef, a seawall, or the like. A scouring prevention material (a scouring prevention material is, for example, a scouring prevention mat) 1 is one in which sand or the like under the scouring prevention material 1 prevents scouring due to waves. For example, asphalt, synthetic fiber These are made of synthetic resin, hood cloth, etc., and are water permeable and water impermeable.
Further, as shown in FIG. 2, for example, as shown in FIG. 2, the water-permeable weight 2 is a paddle (grain of stone to be filled) in a net cage [a net cage is a substantially rectangular parallelepiped shape of 2 m × 2 m × 0.5 m, for example]. The diameter is, for example, 50 mm to 150 mm, 200 mm to 3000 mm, or the like, or a block-shaped concrete with holes.
As an example of the scouring prevention material 1 of the above-described embodiment, a scouring prevention mat is shown. However, in the present invention, not limited to this, the scouring prevention material 1 is not illustrated, Those filled with filling stones or those filled with filling stones may be used.

従って、上述した洗掘防止材の移動防止体によれば、透水性の錘２で、錘２内を海水が通過するため、波浪による揚圧力が軽減され、洗掘防止材１の先端が持ち上げられて、洗掘防止材の移動防止体１がめくれ等による移動に起因する破損が防止され、洗掘防止材の移動防止体１の機能を保持することができる。
特に、洗掘防止材の移動防止体１が透水性の洗掘防止用マットであると、洗掘防止材の移動防止体１が不透水性のものに比べ、洗掘防止材の移動防止体１を海水が通過する分、波浪による揚圧力が軽減され、洗掘防止材の移動防止体１が持ち上げられて、洗掘防止材の移動防止体１がめくれ等による移動に起因する破損が防止され、洗掘防止材の移動防止体１の機能を保持することができる。 Therefore, according to the movement preventing body of the scouring prevention material described above, seawater passes through the weight 2 with the water permeable weight 2, so that the lifting pressure due to waves is reduced and the tip of the scouring prevention material 1 is lifted. Thus, the damage caused by the movement of the anti-scouring material 1 of the scouring preventive material is prevented, and the function of the anti-movement material 1 of the anti-scouring material can be maintained.
In particular, when the scouring prevention material movement prevention body 1 is a water-permeable scouring prevention mat, the scouring prevention material movement prevention body 1 is less water-permeable than the scouring prevention material movement prevention body 1. As seawater passes through 1, the lifting pressure due to waves is reduced, the scouring prevention material movement prevention body 1 is lifted, and the scouring prevention material movement prevention body 1 is prevented from being damaged due to turning or the like. Thus, it is possible to maintain the function of the scouring prevention material movement prevention body 1.

次に、防波堤等の構造物１０の基礎部分１１を保護するために、基礎部分１０の水底に洗掘防止材（洗掘防止材は、例えば、洗掘防止用マット）１を敷設する洗掘防止材の敷設方法について、説明する。
洗掘防止材１の沖側の端部に取り付けられた透水性の錘２を有する洗掘防止材１を水底に敷設する（敷設工程）。
敷設工程においては、透水性の錘２を有する洗掘防止材１を水底に敷設しても良いが、透水性の錘２を水底に敷設し、その後、洗掘防止材１を敷設し、その後、透水性の錘２と洗掘防止材１とを図示しない連結部材（ファスナー、ロープ、穴あきベルト等）連結して行う。
この敷設工程の後、沖側から遠い側の洗掘防止材１の端部を前記水底に固定する（固定工程）。固定は、例えば、アンカ−３を打ち込んで行う。
この固定工程の後、洗掘防止材１の上に基礎部分１１を形成する（基礎形成工程）。基礎部分１１は、例えば、石を積み上げたものである。
この基礎形成工程の後、基礎部分１１の上に、構造物１０を形成する（構造物形成工程）ものである。
その結果、上述した洗掘防止材の敷設方法によれば、沖側の端部に取り付けられた透水性の錘２を有する洗掘防止材１を水底に敷設する敷設工程を有するため、透水性の錘２を利用して、洗掘防止材１の沖側の端部を所定位置に容易に保持させ、洗掘防止材１の敷設工事を容易にすることができる。 Next, in order to protect the foundation part 11 of the structure 10 such as a breakwater, the scouring laying a scouring prevention material (for example, the scouring prevention material is a scouring prevention mat) 1 on the bottom of the foundation part 10. A method of laying the prevention material will be described.
The scouring prevention material 1 having a water-permeable weight 2 attached to the offshore side end of the scouring prevention material 1 is laid on the bottom of the water (laying step).
In the laying step, the scouring prevention material 1 having the permeable weight 2 may be laid on the bottom of the water, but the permeable weight 2 is laid on the bottom of the water, and then the scouring prevention material 1 is laid. The permeable weight 2 and the scouring prevention material 1 are connected by a connecting member (such as a fastener, a rope, or a perforated belt) (not shown).
After this laying step, the end of the scouring prevention material 1 on the side far from the offshore side is fixed to the water bottom (fixing step). For example, the anchor 3 is driven in.
After this fixing step, the base portion 11 is formed on the scouring prevention material 1 (base forming step). The base portion 11 is, for example, a pile of stones.
After this foundation formation process, the structure 10 is formed on the foundation part 11 (structure formation process).
As a result, according to the laying method of the scouring prevention material described above, the scouring prevention material 1 having the permeable weight 2 attached to the offshore side end portion has a laying step of laying on the bottom of the water. By using the weight 2, the offshore end of the scouring prevention material 1 can be easily held at a predetermined position, and the laying work of the scouring prevention material 1 can be facilitated.

１ 洗掘防止材（例えば、洗掘防止用マット）
２ 透水性の錘
１０ 構造物
１１ 基礎部分 1 Scouring prevention material (for example, scouring prevention mat)
2 Permeable weight 10 Structure 11 Base part

Claims (3)

構造物の基礎部分の水底に敷設された洗掘防止材と、この洗掘防止材の沖側の端部に取り付けられた透水性の錘とを備えている
ことを特徴とする洗掘防止材の移動防止体。 A scouring prevention material comprising a scouring prevention material laid on the bottom of the foundation of the structure, and a water permeable weight attached to an offshore end of the scouring prevention material. Anti-moving body. 洗掘防止材が透水性の洗掘防止用マットである
ことを特徴とする請求項１記載の洗掘防止材の移動防止体。 The scour preventive material according to claim 1, wherein the scour preventive material is a water-permeable scour preventive mat. 防波堤等の構造物の基礎部分を保護するために、前記基礎部分の水底に洗掘防止材を敷設する洗掘防止材の敷設方法であって、
沖側の端部に取り付けられた透水性の錘を有する洗掘防止材を前記水底に敷設する敷設工程と、
この敷設工程の後、沖側から遠い側の前記洗掘防止材の端部を前記水底に固定する固定工程と、
この固定工程の後、前記洗掘防止材の上に前記基礎部分を形成する基礎形成工程と、
この基礎形成工程の後、前記基礎部分の上に、前記構造物を形成する構造物形成工程とを
備えていることを特徴とする洗掘防止材の敷設方法。 In order to protect the foundation part of a structure such as a breakwater, a scouring prevention material laying method for laying a scouring prevention material on the bottom of the foundation part,
A laying step of laying a scouring prevention material having a water-permeable weight attached to an offshore side end on the water bottom;
After this laying step, a fixing step of fixing the end of the scouring prevention material on the side far from the offshore side to the water bottom,
After this fixing step, a foundation forming step for forming the foundation portion on the scouring prevention material,
A scouring prevention material laying method comprising: a structure forming step for forming the structure on the foundation portion after the foundation forming step.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020041315A (en) * 2018-09-10 2020-03-19 鹿島建設株式会社 Scour preventing construction around pile-shaped body, and construction method of scour preventing construction around pile-shaped body

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US2454292A (en) * 1946-04-05 1948-11-23 Andrew B Pickett Revetment mat
JPH0449304A (en) * 1990-06-15 1992-02-18 Sansui Sangyo Kk Sea bottom coating sheet
JPH0657724A (en) * 1992-08-14 1994-03-01 Toa Kogaku Kk Subaqueous covering sheet of underwater structure and method of construction of laying thereof
JP2002227168A (en) * 2001-02-02 2002-08-14 Maeda Kosen Co Ltd Riverbed structure and riverbed protecting method
US20050158122A1 (en) * 2002-04-19 2005-07-21 Keun Hee Lee Method for contructing check dam or fire prevention dam using gear-type block

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2454292A (en) * 1946-04-05 1948-11-23 Andrew B Pickett Revetment mat
JPH0449304A (en) * 1990-06-15 1992-02-18 Sansui Sangyo Kk Sea bottom coating sheet
JPH0657724A (en) * 1992-08-14 1994-03-01 Toa Kogaku Kk Subaqueous covering sheet of underwater structure and method of construction of laying thereof
JP2002227168A (en) * 2001-02-02 2002-08-14 Maeda Kosen Co Ltd Riverbed structure and riverbed protecting method
US20050158122A1 (en) * 2002-04-19 2005-07-21 Keun Hee Lee Method for contructing check dam or fire prevention dam using gear-type block

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020041315A (en) * 2018-09-10 2020-03-19 鹿島建設株式会社 Scour preventing construction around pile-shaped body, and construction method of scour preventing construction around pile-shaped body
JP7123709B2 (en) 2018-09-10 2022-08-23 鹿島建設株式会社 Construction method of anti-scouring work around pile-shaped body and anti-scouring work around pile-shaped body

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