JP2004067022A - Contamination preventing frame ship - Google Patents

Contamination preventing frame ship Download PDF

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Publication number
JP2004067022A
JP2004067022A JP2002231688A JP2002231688A JP2004067022A JP 2004067022 A JP2004067022 A JP 2004067022A JP 2002231688 A JP2002231688 A JP 2002231688A JP 2002231688 A JP2002231688 A JP 2002231688A JP 2004067022 A JP2004067022 A JP 2004067022A
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JP
Japan
Prior art keywords
frame
ship
port
starboard
seawater
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2002231688A
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Japanese (ja)
Inventor
Takaharu Oshita
大下 隆晴
Hideki Kubota
久保田 秀記
Kazunori Watanabe
渡辺 一則
Masami Morikane
森兼 雅美
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.)
KAIYO SHIGEN KAIHATSU KK
MEC ENGINEERING SERVICE CO Ltd
Original Assignee
KAIYO SHIGEN KAIHATSU KK
MEC ENGINEERING SERVICE CO Ltd
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 KAIYO SHIGEN KAIHATSU KK, MEC ENGINEERING SERVICE CO Ltd filed Critical KAIYO SHIGEN KAIHATSU KK
Priority to JP2002231688A priority Critical patent/JP2004067022A/en
Publication of JP2004067022A publication Critical patent/JP2004067022A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a contamination preventing frame ship having a structure capable of speedily submerging and surfacing the frame ship in a shorter period of time. <P>SOLUTION: In the contamination preventing frame ship in which a port frame portion 12 and a starboard frame portion 13 are provided to both left and right sides of a main body frame portion 11, a door portion 14 is provided at its distal end portion, and ballast tanks 15 for submerging and surfacing by introducing or releasing seawater are provided in the above main frame portion 11, the port frame portion 12 and the starboard frame portion 13, and a non-tank portion 16 which is not a ballast tank 15 is provided to a section where the balance of the frame ship is not lost of at least the port frame portion 12 and the starboard frame portion 13 . <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】本発明は、埋立や護岸等を目的として海中に土砂を投入する際に発生する海水の汚濁を防止するための汚濁防止枠船に関するものである。
【0002】
【従来の技術】図1乃至図3を参照して説明する。従来から、埋立や護岸等を行うために海中に土砂を投入する際に、海水の汚濁を防止するために汚濁防止用の枠船20が使用されている。
【0003】
この枠船20は、本体枠部21の左右両側に左舷枠部22と右舷枠部23を設け、その先端部に扉部24を設けている。そして、土砂を投入する場所まで曳航し、アンカーによって固定した後、扉部24を開いて土運船1を入渠させ、扉部24を閉じ、土運船1の底を開いて土砂Sを海中に投入する。このとき、投入された土砂Sによって海水は汚濁するが、その汚濁水は枠船20によって周囲に拡散することがない。
【0004】
この従来の枠船20には、ポンプ室等の必要不可欠の区画を除き、そのほぼ全域にわたってバラストタンク25を形成しており、ポンプによって当該バラストタンク25に海水を注入し、または排出することによって、枠船20を水深に対応して沈降または浮上させるようにしている。
【0005】
【発明が解決しようとする課題】しかし、この従来の汚濁防止枠船20には改善すべき点がある。すなわち、この枠船20にはそのほぼ全域にわたってバラストタンク25を形成しているので、その容積が必要以上に大きく、従って、枠船20を沈降または浮上させる際の海水の注入または排出に多くの時間を必要としている。
【0006】
本発明はこうした問題に鑑み創案されたもので、枠船の沈降および浮上をより短時間で迅速に行うことのできる構造の汚濁防止枠船を提供することを課題とする。
【0007】
【課題を解決するための手段】図4乃至図9を参照して説明する。第一の発明は、本体枠部11の左右両側に左舷枠部12と右舷枠部13を設けると共に、その先端部に扉部14を設け、前記本体枠部11、左舷枠部12および右舷枠部13に、海水を注入または排出して、沈降または浮上させるためのバラストタンク15を設けた汚濁防止枠船であり、少なくとも、前記左舷枠部12と右舷枠部13の、前記枠船の平衡を逸することがない部分に、バラストタンク15ではないノンタンク部16を設けてなる。
【0008】
第二の発明は、本体枠部11の左右両側に左舷枠部12と右舷枠部13を設けると共に、その先端部に扉部14を設け、前記本体枠部11、左舷枠部12および右舷枠部13に、海水を注入または排出して、沈降または浮上させるためのバラストタンク15を設けた汚濁防止枠船であり、少なくとも、前記左舷枠部12と右舷枠部13の、前記枠船の平衡を逸することがない部分に、バラストタンク15ではないノンタンク部16を設け、かつ、前記ノンタンク部16を、海水が自然に出入りできる連通区画室16aで構成してなる。
【0009】
第三の発明は、本体枠部11の左右両側に左舷枠部12と右舷枠部13を設けると共に、その先端部に扉部14を設け、前記本体枠部11、左舷枠部12および右舷枠部13に、海水を注入または排出して、沈降または浮上させるためのバラストタンク15を設けた汚濁防止枠船であり、少なくとも、前記左舷枠部12と右舷枠部13の、前記枠船の平衡を逸することがない部分に、バラストタンク15ではないノンタンク部16を設け、かつ、前記ノンタンク部16を、海水が自然に出入りできる凹画室16cで構成してなる。
【0010】
【発明の実施の形態】本発明に係る汚濁防止枠船10の第一実施形態を、図4乃至図7に示す。この枠船10は、本体枠部11の左右両側に左舷枠部12と右舷枠部13を設けると共に、その先端部に扉部14を設け、本体枠部11、左舷枠部12および右舷枠部13に、海水を注入または排出して、沈降または浮上させるためのバラストタンク15を設けている。
【0011】
そして、左舷枠部12と右舷枠部13のうち、枠船10の平衡を逸することがないそれぞれ三カ所に、バラストタンク15ではないノンタンク部16を設けている。なお、本実施形態においては、このノンタンク部16を、海水が連通路16bを介して自然に出入りできる連通区画室16aで構成している。なお、連通路16bの形状や数は、本実施形態のものに限定されるものではなく、連通区画室16aの大きさや形状に応じて適宜設定することができる。
【0012】
この汚濁防止枠船10は、左舷枠部12と右舷枠部13に海水が自然に出入りできる連通区画室16aを設けているので、その分、バラストタンク15の容積を減少させることができる。従って、バラストタンク15への海水の注入および排出を、従来の枠船20と比較して短時間で行うことができ、当該枠船10をより迅速に沈降および浮上させることができる。
【0013】
また、従来の枠船20と同じ時間で沈降および浮上を達成させる場合は、バラストタンク15の容積が大幅に小さいことから、より小型のポンプを使用することができ、また、配管も小径で、かつその数も削減することができる。従って、建造費を軽減することができると共に、ポンプの運転コストを削減でき、ポンプおよび配管の保守維持費も軽減することができる。
【0014】
本発明に係る汚濁防止枠船10の第二実施形態を、図8および図9に示す。この枠船10の特徴は、左舷枠部12および右舷枠部13に形成したノンタンク部16を、海水が自然に出入りできる凹画室16cで構成したことである。なお、凹画室16cは、曳航中の海水の抵抗を考慮して、枠船10の内側に形成することが好ましいが、外側に形成することもできる。
【0015】
こうした構成としたことによって、第一実施形態の場合と同様に、枠船10を迅速に沈降および浮上させることができる。また、従来の枠船20と同じ時間で沈降および浮上させる場合には、小型のポンプと小径の配管を使用することができ、また、配管の数も減らすことができるので、建造費と保守維持費を削減することができる。
【0016】
また、この枠船10は、ノンタンク部16を凹画室16cで構成して、一方側を解放しているので、その開放部分の鋼板Pを省くことができる。この種の枠船10は一般に長さが80m以上あり、従って、開放部分において省かれる鋼板Pはきわめて大量である。その結果、建造費をさらに削減することができる。また、枠船10の重量を軽減することができ、曳航が容易となって、それに要するコストも抑えることができる。
【0017】
なお、上記二つの実施形態において、ノンタンク部16は左舷枠部12と右舷枠部13のみに形成しているが、枠船10の均衡を失わない範囲で、本体枠部11にも設けることができる。また、ノンタンク部16の数や大きさは、枠船10の大きさや重量に応じて設定する。
【0018】
さらに、本発明において、ノンタンク部16は連通区画室16aと凹画室16cに限定されるものではなく、例えば、適量の水や土砂等を密閉状態で収納した室など、海水を注入および排出するバラストタンク15以外の空間部等を含む。
【0019】
【発明の効果】請求項1に記載の発明に係る汚濁防止枠船10は、少なくとも、左舷枠部12と右舷枠部13の、枠船10の平衡を逸することがない部分に、バラストタンク15ではないノンタンク部16を設けたので、枠船10を迅速に沈降および浮上させることができる。また、従来の枠船10と同じ時間で沈降および浮上させる場合には、小型のポンプと小径の配管を使用でき、また、配管の数も減らすことができるので、建造費や維持管理費を削減することができる。
【0020】
請求項2に記載の発明に係る汚濁防止枠船10は、ノンタンク部16を海水が自然に出入りできる連通区画室16aで構成したので、同様に、枠船10の沈降および浮上を迅速化することができる。また、建造費や維持管理費の削減を図ることができる。
【0021】
請求項3に記載の発明に係る汚濁防止枠船10は、ノンタンク部16を、海水が自然に出入りできる凹画室16cで構成したので、同様に、枠船10の沈降および浮上を迅速化することができると共に、建造費や維持管理費の削減を図ることができる。また、開放部分の鋼板Pを省くことができるので、建造費をさらに削減することができる。さらに、これにより軽量化することができるので、曳航が容易となり、曳航に要するコストも削減することができる。
【図面の簡単な説明】
【図1】従来例に係る汚濁防止枠船を示す側面図である。
【図2】図1に示す枠船の平面図である。
【図3】図1に示す枠船の正面図である。
【図4】本発明に係る汚濁防止枠船の第一実施形態を示す側面図である。
【図5】図4に示す枠船の平面図である。
【図6】図4に示す枠船の正面図である。
【図7】図6におけるA−A線部分拡大断面図である。
【図8】本発明に係る汚濁防止枠船の第二実施形態における凹画室を示す部分拡大断面図である(図4のA−A線に相当する)。
【図9】本発明に係る汚濁防止枠船の第二実施形態における凹画室の他の形態を示す部分拡大断面図である(図4のA−A線に相当する)。
【符号の説明】
1    土運船
10   汚濁防止枠船
11   本体枠部
12   左舷枠部
13   右舷枠部
14   扉部
15   バラストタンク
16   ノンタンク部
16a  連通区画室
16b  連通路
16c  凹画室
20   汚濁防止枠船
21   本体枠部
22   左舷枠部
23   右舷枠部
24   扉部
25   バラストタンク
P    鋼板
S    土砂
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pollution prevention frame ship for preventing seawater from being polluted when earth and sand are poured into the sea for the purpose of reclaiming land and revetment.
[0002]
2. Description of the Related Art A description will be given with reference to FIGS. 2. Description of the Related Art Conventionally, a polluting prevention frame ship 20 has been used to prevent pollution of seawater when pouring earth and sand into the sea for landfilling, revetment, and the like.
[0003]
The frame ship 20 is provided with a port frame portion 22 and a starboard frame portion 23 on both left and right sides of a main body frame portion 21, and a door portion 24 is provided at a tip end thereof. Then, after towing to the place where the earth and sand are to be thrown in, and fixed by the anchor, the door 24 is opened and the earth transport vessel 1 is docked, the door 24 is closed, the bottom of the earth transport vessel 1 is opened, and the earth and sand S is submerged. To At this time, the seawater is polluted by the injected earth and sand S, but the polluted water does not diffuse to the surroundings by the frame ship 20.
[0004]
In this conventional frame ship 20, a ballast tank 25 is formed over substantially the entire area except for an indispensable section such as a pump room, and seawater is injected into or discharged from the ballast tank 25 by a pump. The frame ship 20 is settled or floated according to the water depth.
[0005]
However, there is a point to be improved in the conventional pollution control frame ship 20. That is, since the ballast tank 25 is formed over substantially the entire area of the frame ship 20, the volume thereof is larger than necessary, and therefore, a large amount of seawater is injected or discharged when the frame ship 20 sinks or floats. Need time.
[0006]
The present invention has been made in view of such a problem, and an object of the present invention is to provide a pollution prevention frame ship having a structure capable of setting and floating a frame ship in a shorter time and more quickly.
[0007]
A description will be given with reference to FIGS. 4 to 9. In the first invention, a port frame 12 and a starboard frame 13 are provided on both left and right sides of a main body frame 11, and a door portion 14 is provided at a distal end thereof, and the main body frame 11, the port frame 12 and the starboard frame are provided. A pollution control frame ship provided with a ballast tank 15 for injecting or discharging seawater to settle or float a seawater portion 13, and at least equilibrium of the frame ships of the port frame portion 12 and the starboard frame portion 13. A non-tank portion 16 which is not the ballast tank 15 is provided in a portion where no loss occurs.
[0008]
In the second invention, a port frame 12 and a starboard frame 13 are provided on both the left and right sides of the main body frame 11, and a door 14 is provided at the tip of the port frame 12, and the main body frame 11, the port frame 12 and the starboard frame are provided. A pollution control frame ship provided with a ballast tank 15 for injecting or discharging seawater to settle or float a seawater portion 13, and at least equilibrium of the frame ships of the port frame portion 12 and the starboard frame portion 13. A non-tank portion 16 other than the ballast tank 15 is provided in a portion where the water is not lost, and the non-tank portion 16 is constituted by a communication compartment 16a through which seawater can naturally enter and exit.
[0009]
In the third invention, a port frame 12 and a starboard frame 13 are provided on both the left and right sides of the main body frame 11, and a door 14 is provided at the tip of the port frame 12, the main body frame 11, the port frame 12 and the starboard frame. A pollution control frame ship provided with a ballast tank 15 for injecting or discharging seawater to settle or float a seawater portion 13, and at least equilibrium of the frame ships of the port frame portion 12 and the starboard frame portion 13. A non-tank portion 16 that is not the ballast tank 15 is provided in a portion where the water is not lost, and the non-tank portion 16 is constituted by a concave chamber 16c through which seawater can naturally enter and leave.
[0010]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a pollution control frame ship 10 according to the present invention is shown in FIGS. The frame ship 10 is provided with a port frame 12 and a starboard frame 13 on both left and right sides of a main frame 11, and a door 14 is provided at a distal end thereof, and the main frame 11, the port frame 12 and the starboard frame are provided. 13 is provided with a ballast tank 15 for injecting or discharging seawater to settle or float.
[0011]
Further, non-tank portions 16 which are not ballast tanks 15 are provided at three portions of the port frame portion 12 and the starboard frame portion 13 which do not deviate the balance of the frame ship 10. In the present embodiment, the non-tank portion 16 is constituted by a communication compartment 16a through which seawater can naturally enter and exit through the communication passage 16b. The shape and the number of the communication passages 16b are not limited to those of the present embodiment, but can be appropriately set according to the size and shape of the communication compartment 16a.
[0012]
Since the pollution prevention frame ship 10 is provided with the communication compartment 16a in which the seawater can naturally enter and leave the port frame 12 and the starboard frame 13, the volume of the ballast tank 15 can be reduced accordingly. Therefore, the seawater can be injected into and discharged from the ballast tank 15 in a shorter time than in the conventional frame ship 20, and the frame ship 10 can settle and float more quickly.
[0013]
In addition, when sedimentation and ascent are achieved in the same time as the conventional frame ship 20, the volume of the ballast tank 15 is significantly small, so that a smaller pump can be used. And the number can also be reduced. Therefore, the construction cost can be reduced, the operating cost of the pump can be reduced, and the maintenance cost of the pump and piping can be reduced.
[0014]
8 and 9 show a second embodiment of the pollution prevention frame ship 10 according to the present invention. The feature of the frame ship 10 is that the non-tank portion 16 formed in the port frame portion 12 and the starboard frame portion 13 is configured as a concave chamber 16c through which seawater can naturally enter and leave. The concave chamber 16c is preferably formed inside the frame ship 10 in consideration of the resistance of seawater during towing, but may be formed outside.
[0015]
With such a configuration, the frame ship 10 can quickly sink and float as in the case of the first embodiment. In the case of sinking and floating in the same time as the conventional frame ship 20, a small pump and a small-diameter pipe can be used, and the number of pipes can be reduced. Costs can be reduced.
[0016]
In addition, since the non-tank portion 16 of the frame ship 10 is configured by the intaglio chamber 16c and one side is opened, the steel plate P in the open portion can be omitted. This type of frame ship 10 is generally 80 m or more in length, and therefore the amount of steel plate P omitted in the open part is extremely large. As a result, construction costs can be further reduced. Further, the weight of the frame ship 10 can be reduced, the towing becomes easy, and the cost required for it can be suppressed.
[0017]
In the above two embodiments, the non-tank portion 16 is formed only on the port frame portion 12 and the starboard frame portion 13. However, the non-tank portion 16 may be provided on the main body frame portion 11 as long as the balance of the frame ship 10 is not lost. it can. Further, the number and size of the non-tank portions 16 are set according to the size and weight of the frame ship 10.
[0018]
Further, in the present invention, the non-tank section 16 is not limited to the communication compartment 16a and the intaglio chamber 16c. For example, a ballast for injecting and discharging seawater, such as a chamber containing an appropriate amount of water, earth and sand, etc. in a closed state. Including a space other than the tank 15.
[0019]
According to the first aspect of the present invention, the pollution control frame ship 10 has at least a ballast tank at a portion of the port frame portion 12 and the starboard frame portion 13 where the balance of the frame ship 10 is not lost. Since the non-tank portion 16 other than 15 is provided, the frame ship 10 can quickly sink and float. In the case of sinking and ascending in the same time as the conventional frame ship 10, a small pump and a small-diameter pipe can be used, and the number of pipes can be reduced, so that construction costs and maintenance costs are reduced. can do.
[0020]
In the pollution prevention frame ship 10 according to the second aspect of the present invention, since the non-tank portion 16 is constituted by the communication compartment 16a through which seawater can naturally enter and exit, similarly, the settlement and floating of the frame ship 10 can be speeded up. Can be. In addition, construction costs and maintenance costs can be reduced.
[0021]
In the pollution prevention frame ship 10 according to the third aspect of the present invention, since the non-tank portion 16 is constituted by the intaglio chamber 16c through which seawater can naturally enter and exit, similarly, the settlement and floating of the frame ship 10 can be speeded up. Construction costs and maintenance costs can be reduced. In addition, since the steel plate P in the open portion can be omitted, the construction cost can be further reduced. Further, since the weight can be reduced, towing is facilitated, and the cost required for towing can be reduced.
[Brief description of the drawings]
FIG. 1 is a side view showing a pollution prevention frame ship according to a conventional example.
FIG. 2 is a plan view of the frame ship shown in FIG.
FIG. 3 is a front view of the frame ship shown in FIG. 1;
FIG. 4 is a side view showing the first embodiment of the pollution prevention frame ship according to the present invention.
FIG. 5 is a plan view of the frame ship shown in FIG. 4;
6 is a front view of the frame ship shown in FIG.
FIG. 7 is an enlarged sectional view taken along the line AA in FIG. 6;
FIG. 8 is a partially enlarged cross-sectional view showing a concave chamber in the second embodiment of the pollution prevention frame ship according to the present invention (corresponding to line AA in FIG. 4).
FIG. 9 is a partially enlarged sectional view showing another form of the concave chamber in the second embodiment of the pollution control frame ship according to the present invention (corresponding to line AA in FIG. 4).
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Earth transport ship 10 Pollution prevention frame ship 11 Main body frame part 12 Port frame part 13 Starboard frame part 14 Door part 15 Ballast tank 16 Non-tank part 16a Communication compartment 16b Communication passage 16c Dent room 20 Pollution prevention frame ship 21 Body frame part 22 Port frame 23 Starboard frame 24 Door 25 Ballast tank P Steel plate S Earth and sand

Claims (3)

本体枠部(11)の左右両側に左舷枠部(12)と右舷枠部(13)を設けると共に,その先端部に扉部(14)を設け,前記本体枠部、左舷枠部および右舷枠部に,海水を注入または排出して,沈降または浮上させるためのバラストタンク(15)を設けた汚濁防止枠船であり、少なくとも,前記左舷枠部と右舷枠部の,前記枠船の平衡を逸することがない部分に,バラストタンクではないノンタンク部(16)を設けてなる汚濁防止枠船。A port frame (12) and a starboard frame (13) are provided on the left and right sides of the main body frame (11), and a door (14) is provided at the distal end thereof, and the main body frame, the port frame and the starboard frame are provided. A pollution control frame ship provided with a ballast tank (15) for injecting or discharging seawater to settle or float the seawater, and at least equilibrates the frame ship between the port frame portion and the starboard frame portion. A pollution control frame ship that has a non-tank part (16) that is not a ballast tank in a part that does not miss. 本体枠部(11)の左右両側に左舷枠部(12)と右舷枠部(13)を設けると共に,その先端部に扉部(14)を設け,前記本体枠部,左舷枠部および右舷枠部に,海水を注入または排出して,沈降または浮上させるためのバラストタンク(15)を設けた汚濁防止枠船であり、少なくとも,前記左舷枠部と右舷枠部の,前記枠船の平衡を逸することがない部分に,バラストタンクではないノンタンク部(16)を設け、かつ,前記ノンタンク部を,海水が自然に出入りできる連通区画室(16a)で構成してなる汚濁防止枠船。A port frame (12) and a starboard frame (13) are provided on both the left and right sides of the main body frame (11), and a door (14) is provided at the tip of the port frame (12) and the port frame. A pollution control frame ship provided with a ballast tank (15) for injecting or discharging seawater to settle or float the seawater, and at least equilibrates the frame ship between the port frame portion and the starboard frame portion. A pollution control frame ship comprising a non-tank portion (16) which is not a ballast tank provided in a portion which is not lost, and the non-tank portion is constituted by a communication compartment (16a) through which seawater can enter and exit naturally. 本体枠部(11)の左右両側に左舷枠部(12)と右舷枠部(13)を設けると共に,その先端部に扉部(14)を設け,前記本体枠部,左舷枠部および右舷枠部に,海水を注入または排出して,沈降または浮上させるためのバラストタンク(15)を設けた汚濁防止枠船であり、少なくとも,前記左舷枠部と右舷枠部の,前記枠船の平衡を逸することがない部分に,バラストタンクではないノンタンク部(16)を設け、かつ,前記ノンタンク部を,海水が自然に出入りできる凹画室(16c)で構成してなる汚濁防止枠船。A port frame (12) and a starboard frame (13) are provided on both the left and right sides of the main body frame (11), and a door (14) is provided at the tip of the port frame (12) and the port frame. A pollution control frame ship provided with a ballast tank (15) for injecting or discharging seawater to settle or float the seawater, and at least equilibrates the frame ship between the port frame portion and the starboard frame portion. A pollution control frame ship comprising a non-tank portion (16) which is not a ballast tank in a portion which is not lost, and the non-tank portion is constituted by a concave chamber (16c) through which seawater can naturally enter and leave.
JP2002231688A 2002-08-08 2002-08-08 Contamination preventing frame ship Pending JP2004067022A (en)

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