JP5872296B2 - Dredge equipment and dredging method - Google Patents
Dredge equipment and dredging method Download PDFInfo
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Description
本発明は、浚渫装置及び浚渫工法に関するものである。 The present invention relates to a dredge apparatus and a dredge method.
従来から行われている浚渫工法では、図３に示されるような浚渫装置１００が用いられている。この浚渫装置１００は、例えば、汲み上げ手段として、ポンプＰを搭載するポンプ船１２を用い、汲み上げ管１３を水底に延ばし、ポンプＰにより水底Ｇの土砂を周辺部の水と共に気中に汲み上げ、貯留槽１４としての土運船に仮置きするものである。そして、貯留槽１４に土砂を沈降させた後、土砂と分離した水（以下、「返還水」という。）Ｗを水中に戻して、土砂のみを回収するものである（例えば、特許文献１参照）。又、貯留槽１４の返還水を水中に戻す放出手段としての排水管１５を、水底Ｇにまで延ばすことで、返還水Ｗを元の水底へと還流させるものである。なお、必要に応じて、排水管１５にもポンプを設置する。 A conventional dredging method uses a dredge apparatus 100 as shown in FIG. This dredging device 100 uses, for example, a pump ship 12 equipped with a pump P as a pumping means, extends the pumping pipe 13 to the bottom of the water, pumps up the earth and sand of the bottom G together with the water in the surrounding area, and stores it. It is temporarily placed on a ship as a tank 14. Then, after sedimentation of sediment in the storage tank 14, water separated from the sediment (hereinafter referred to as "return water") W is returned to the water and only the sediment is collected (for example, see Patent Document 1). ). Further, the return water W is returned to the original bottom by extending a drain pipe 15 as a discharge means for returning the return water of the storage tank 14 to the water to the bottom G. Note that a pump is also installed in the drain pipe 15 as necessary.
さて、上記浚渫工法において、貯留槽１４に汲み上げた土砂及び水を仮置きして、土砂を沈降させる際に、土砂と水とを十分に分離するためには、相当の時間を要することとなる。その間に、図４に示されるように日射Ｓの影響を受けると、貯留槽に仮置きされた土砂及び水の混合液の温度が上昇して、水の密度が小さくなる。この温度上昇した変換水ＷＨを、水底Ｇにまで延ばした排水管１５によって水中へと戻すと、周辺の水との密度差により、返還水ＷＨは水底Ｇの近傍に戻ることなく、図４中に矢印で模式的に示されるように上昇し、周辺の水域の水面近くに移流、拡散して、周辺水域の環境に変化を及ぼすおそれがある。又、浚渫水域では水底近傍に浮泥が発生することが多く、返還水ＷＨの水中における流れに乗って浮泥が水面へと巻上げられ、水面付近を濁らせてしまうおそれもある。
本発明は、上記課題に鑑みてなされたものであり、その目的とするところは、浚渫に伴い生じる返還水が、周辺水域の水面近くに拡散することを防ぐことにある。
Now, in the above-mentioned dredging method, it takes a considerable amount of time to sufficiently separate the earth and sand when the earth and sand pumped into the storage tank 14 are temporarily placed and the earth and sand are allowed to settle. . In the meantime, as shown in FIG. 4, when affected by the solar radiation S, the temperature of the mixed liquid of the earth and sand temporarily placed in the storage tank rises, and the density of the water decreases. When the converted water WH having increased in temperature is returned to the water by the drain pipe 15 extending to the bottom G, the return water WH does not return to the vicinity of the bottom G due to the density difference with the surrounding water. As shown schematically by the arrow in Fig. 4, it rises and advects and diffuses near the surface of the surrounding water area, which may change the environment of the surrounding water area. In addition, floating mud is often generated in the vicinity of the water bottom in the flooded area, and the floating mud is wound up on the water surface by the flow of the return water WH in the water, and the vicinity of the water surface may become cloudy.
This invention is made | formed in view of the said subject, The place made into the objective is to prevent that the return water which arises with dredging diffuses near the water surface of a surrounding water area.
（発明の態様）
以下の発明の態様は、本発明の構成を例示するものであり、本発明の多様な構成の理解を容易にするために、項別けして説明するものである。各項は、本発明の技術的範囲を限定するものではなく、発明を実施するための最良の形態を参酌しつつ、各項の構成要素の一部を置換し、削除し、又は、更に他の構成要素を付加したものについても、本願発明の技術的範囲に含まれ得るものである。
(Aspect of the Invention)
The following aspects of the present invention exemplify the configuration of the present invention, and will be described separately for easy understanding of various configurations of the present invention. Each section does not limit the technical scope of the present invention, and some of the components of each section are replaced, deleted, or further while referring to the best mode for carrying out the invention. Those to which the above components are added can also be included in the technical scope of the present invention.
（１）水底の土砂を周辺部の水と共に気中に汲み上げる汲み上げ手段と、汲み上げた土砂及び水を仮置きして土砂を沈降させる貯留槽と、該貯留槽内に仮置きされた土砂及び水の混合液を冷却する冷却手段と、前記貯留槽内で土砂と分離した水を、水中に戻す放出手段とを含む浚渫装置。
本項に記載の浚渫装置は、汲み上げ手段によって貯留槽に汲み上げた土砂及び水を、貯留槽に仮置きして土砂を沈降させる際に相当の時間を置くと共に、冷却手段によって、貯留槽内に仮置きされた土砂及び水の混合液を冷却するものである。そして、貯留槽に仮置きされた土砂及び水の混合液の温度が、その間に日射の影響等を受けて上昇することを防ぎつつ、土砂と水とを十分に分離させた後、放出手段によって返還水を水中へと戻すものである。
(1) A pumping means for pumping the sediment at the bottom of the water together with the water in the surrounding area, a storage tank for temporarily placing the pumped sediment and water and settling the sediment, and the sediment and water temporarily placed in the storage tank A dredge device comprising: a cooling means for cooling the mixed liquid of the above; and a discharging means for returning the water separated from the earth and sand in the storage tank to the water .
The dredging device described in this section puts a considerable amount of time when the sediment and water pumped into the storage tank by the pumping means are temporarily placed in the storage tank and the sediment is allowed to settle. The mixture of temporarily placed earth and sand and water is cooled. And after preventing the rise of the temperature of the mixed liquid of the earth and sand temporarily placed in the storage tank due to the influence of solar radiation, etc., the earth and sand and water are sufficiently separated, The return water is returned to the water.
（２）上記（１）項において、前記冷却手段は、前記貯留槽内に仮置きされた土砂及び水の混合液に浸され、かつ、一部が液面の上方へと露出する吸水性部材を備える浚渫装置（請求項１）。
本項に記載の浚渫装置は、冷却手段の吸水性部材が、貯留槽内に仮置きされた土砂及び水の混合液に浸され、かつ、一部が液面の上方へと露出することにより、吸水性部材によって吸収した水を、いわゆる毛管現象を利用して、吸水性部材を介して液面の上方へと導くものである。そして、気中において吸水性部材から水が蒸発する際の気化熱により、動力を用いることなく、貯留槽内で土砂及び水の混合液を冷却するものである。
(2) In the above item (1), the cooling means is immersed in a mixed solution of earth and sand and water temporarily placed in the storage tank, and a part of the water absorbing member is exposed above the liquid level. A scissor device comprising: (Claim 1 ).
In the dredge apparatus described in this section, the water-absorbing member of the cooling means is immersed in a mixed solution of earth and sand and water temporarily placed in the storage tank, and a part thereof is exposed above the liquid level. The water absorbed by the water- absorbing member is guided to the upper side of the liquid level via the water-absorbing member by utilizing a so-called capillary phenomenon. And the mixed liquid of earth and sand is cooled in a storage tank by the heat of vaporization when water evaporates from the water absorbing member in the air without using power.
（３）上記（２）項において、前記放出手段を構成する排水管は、前記貯留槽の液面の上方を通るように配管され、該排水管に前記吸水性部材が吊下げられている浚渫装置（請求項２）。
本項に記載の浚渫装置は、放出手段を構成する排水管が、貯留槽の液面の上方を通るように配管され、排水管に吸水性部材が吊下げられることで、吸水性部材は、貯留槽内に仮置きされた土砂及び水の混合液に浸され、かつ、一部が液面の上方へと露出した状態に保持されるものである。
(3) In the above item (2), the drainage pipe constituting the discharge means is piped so as to pass above the liquid level of the storage tank, and the water absorbing member is suspended from the drainage pipe. Apparatus (claim 2 ).
Dredging apparatus according to the above drain pipe constituting the discharge means is a pipe so as to pass above the liquid surface of the storage tank, that the water absorbing member is suspended to drain, the water-absorbing member, It is immersed in a mixed solution of earth and sand and water temporarily placed in a storage tank, and is held in a state where a part is exposed above the liquid level.
（４）上記（３）項において、前記排水管と前記吸水性部材とが、熱伝達可能に固定されている浚渫装置（請求項３）。
本項に記載の浚渫装置は、排水管と吸水性部材とが、熱伝達可能に固定されていることで、気中において吸水性部材から水が蒸発する際の気化熱により、排水管の冷却も行うものである。
(4) In the above item (3), the drainage device and the water absorbing member are fixed so as to be capable of transferring heat (claim 3 ).
In the dredge apparatus described in this section, the drain pipe and the water absorbing member are fixed so as to be able to transfer heat, and the drain pipe is cooled by heat of vaporization when water evaporates from the water absorbing member in the air. Also do.
（５）上記（３）（４）項において、前記排水管は、前記貯留槽の液面の上方を蛇行する配管経路を有する浚渫装置（請求項４）。
本項に記載の浚渫装置は、排水管が、貯留槽の液面の上方を蛇行する配管経路を有することで、前記排水管は、前記貯留槽の液面の上方における配管経路長を延ばすものである。そして、排水管に吊下げられる吸水性部材の設置面積を増加させるものである。
(5) In the above items (3) and (4), the drainage pipe has a piping path that meanders above the liquid surface of the storage tank (claim 4 ).
The dredging device described in this section is such that the drain pipe has a pipe path meandering above the liquid level of the storage tank, and the drain pipe extends the pipe path length above the liquid level of the storage tank. It is. And the installation area of the water absorbing member hung by the drain pipe is increased.
（６）上記（２）から（５）項において、前記貯留槽を覆う日除け手段を備える浚渫装置（請求項５）。
本項に記載の浚渫装置は、貯留槽を覆う日除け手段を備えることで、貯留槽に仮置きされた水に対する日射の影響を低減するものである。なお、日除け手段は、貯留槽の上方における通風性を損わないものが望ましい。
（７）上記（２）から（６）項において、前記吸水性部材に風を送る送風手段を備える浚渫装置（請求項６）。
本項に記載の浚渫装置は、送風手段によって吸水性部材に風を送ることで、吸水性部材をいわゆる強制空冷し、気中における吸水性部材からの水の蒸発を促進するものである。
(6) A scissor apparatus comprising sunshade means for covering the storage tank in the above items (2) to (5) (claim 5 ).
The dredge apparatus described in this section is provided with a sunshade that covers the storage tank, thereby reducing the influence of solar radiation on the water temporarily placed in the storage tank. In addition, as for a sunshading means, what does not impair the ventilation property above a storage tank is desirable.
(7) A scissor device according to (2) to (6) above, further comprising a blowing means for sending air to the water absorbing member (Claim 6 ).
The dredge device described in this section is configured to send air to the water absorbent member by the blowing means so as to cause the water absorbent member to be so-called forced air cooling to promote evaporation of water from the water absorbent member in the air.
（８）水底の土砂を周辺部の水と共に気中に汲み上げ、汲み上げた土砂及び水を気中の貯留槽に仮置きして土砂を沈降させながら、土砂と分離した水を、前記貯留槽内に仮置きされた土砂及び水の混合液に浸され、かつ、一部が液面の上方へと露出する吸水性部材によって液面の上方へと導き、気中において前記吸水性部材から水が蒸発する際の気化熱を利用して冷却した後、前記貯留槽内で土砂と分離した水を水中に戻し、土砂を回収する浚渫工法（請求項７）。
本項に記載の浚渫工法は、貯留槽に汲み上げた土砂及び水を、貯留槽に仮置きして土砂を沈降させる際に相当の時間を置くと共に、貯留槽内に仮置きされた土砂及び水の混合液を冷却するものである。しかも、貯留槽内で土砂と分離した水を、動力を用いることなく、一部が液面の上方へと露出する吸水性部材によって液面の上方へと導き、気中において水が蒸発する際の気化熱により冷却するものである。そして、貯留槽に仮置きされた水の温度が、その間に日射の影響等を受けて上昇することを防ぎつつ、土砂と水とを十分に分離させた後、返還水を水中へと戻すものである。
(8) Pumping the sediment from the bottom of the water together with the water in the surrounding area into the air, temporarily placing the pumped soil and water in the air storage tank and allowing the sediment separated to settle , The water-absorbing member is immersed in a mixed liquid of earth and sand temporarily placed on the water and partly exposed above the liquid level, and is guided to the upper side of the liquid level. A cooling method in which the water separated from the earth and sand in the storage tank is returned to the water after cooling using the heat of vaporization when evaporating , and the earth and sand are recovered (claim 7 ).
The dredging method described in this section takes a considerable amount of time when the sediment and water pumped into the storage tank are temporarily placed in the storage tank and sedimented, and the sediment and water temporarily placed in the storage tank. The liquid mixture is cooled. Moreover, when water separated from the earth and sand in the storage tank is guided to the upper surface of the liquid by a water absorbing member that is partially exposed to the upper surface of the liquid without using power , and the water evaporates in the air. It is cooled by the heat of vaporization. And after preventing the temperature of the water temporarily placed in the storage tank from rising due to the influence of solar radiation, etc., the earth and sand are sufficiently separated, and the return water is returned to the water. It is.
本発明はこのように構成したので、浚渫に伴い生じる返還水が、周辺水域の水面近くに拡散することを防ぐことが可能となる。 Since this invention was comprised in this way, it becomes possible to prevent that the return water produced with a dredging diffuses near the water surface of a surrounding water area.
以下、本発明を実施するための形態を、添付図面に基づいて説明する。ここで、従来技術と同一部分、若しくは相当する部分については同一符号で示し、詳しい説明を省略する。
図１には、本発明の実施の形態に係る浚渫装置１０の、貯留槽１４の周辺部の構成を示している。浚渫装置１０は、水底の土砂を周辺部の水と共に気中に汲み上げる汲み上げ手段としての汲み上げ管１３と、汲み上げた土砂及び水を仮置きして土砂を沈降させる貯留槽１４と、貯留槽１４内に仮置きされた土砂及び水の混合液を冷却する冷却手段１６と、貯留槽１４内で土砂と分離した水を、水中に戻す放出手段としての排水管１５を備えている。なお、汲み上げ管１３は、図３の従来例と同様に、ポンプ船１２のポンプＰを介して水底Ｇへと延びているが、ここでは図示を省略している。
DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings. Here, parts that are the same as or correspond to those in the prior art are denoted by the same reference numerals, and detailed description thereof is omitted.
In FIG. 1, the structure of the peripheral part of the storage tank 14 of the dredger apparatus 10 which concerns on embodiment of this invention is shown. The dredging device 10 includes a pumping pipe 13 as a pumping means for pumping the sand and sand from the bottom together with the water in the surrounding area, a storage tank 14 for temporarily placing the pumped earth and water and sedimenting the sand and sand, And a drainage pipe 15 as a discharge means for returning the water separated from the earth and sand in the storage tank 14 to the water. The pumping pipe 13 extends to the water bottom G through the pump P of the pump ship 12 as in the conventional example of FIG. 3, but is not shown here.
冷却手段１６は、貯留槽１４内に仮置きされた土砂及び水の混合液に浸され、かつ、一部が液面の上方へと露出する吸水性部材１８を備えている。この吸水性部材１８には、吸水性が高く、広い表面積を有するシート状の部材、例えば、布や紙等が用いられる。又、排水管１５は、貯留槽１４の液面の上方を通るように配管されており、この排水管１５に、吸水性部材１８が、いわば暖簾のように吊下げられている。又、必要に応じ、排水管１５と吸水性部材１８とが、熱伝達可能となるように、両者が密着する態様で（若しくは熱伝導性の高い吊下げ部材を介して）固定される。
好ましくは、排水管１５は、図示のように貯留槽１４の液面の上方を蛇行する配管経路を有しており、吸水性部材１８も、この蛇行する排水管１５に沿って、蛇行するように設けられている。
The cooling means 16 includes a water-absorbing member 18 that is immersed in a mixed liquid of earth and sand temporarily placed in the storage tank 14 and that is partially exposed above the liquid level. As the water absorbing member 18, a sheet-like member having high water absorption and a large surface area, for example, cloth or paper is used. Moreover, the drain pipe 15 is piped so that it may pass above the liquid level of the storage tank 14, and the water absorption member 18 is suspended by this drain pipe 15 like a warming. Further, if necessary, the drain pipe 15 and the water absorbing member 18 are fixed in such a manner that they are in close contact with each other (or via a suspension member having high thermal conductivity) so that heat can be transferred.
Preferably, the drain pipe 15 has a pipe path that meanders above the liquid level of the storage tank 14 as shown, and the water absorbing member 18 also meanders along the meandering drain pipe 15. Is provided.
更に、必要に応じて、冷却手段１６には、貯留槽１４を覆う日除け手段２０が設けられている。日除け手段２０は、貯留槽１４の上方における通風性を損わないものが望ましく、例えば、金属製のルーバーや、よしず等の自然素材も利用可能である。
又、冷却手段１６として、吸水性部材に風を送る送風手段２２を設けることとしても良い。送風手段２２は電動ファン等が用いられ、吸水性部材１８に効率的に風が当たる位置に配置されるものである。
これら日除け手段２０及び送風手段２２は、適切な固定手段によって、貯留槽１４に対して着脱自在に設置される。
Furthermore, the cooling means 16 is provided with an awning means 20 that covers the storage tank 14 as necessary. The awning means 20 is desirably one that does not impair the air permeability above the storage tank 14, and for example, a natural material such as a metal louver or Yoshizu can also be used.
Moreover, it is good also as providing the ventilation means 22 which sends a wind to a water absorbing member as the cooling means 16. FIG. The blower means 22 is an electric fan or the like, and is disposed at a position where the water-absorbing member 18 is efficiently hit by wind.
The awning means 20 and the air blowing means 22 are detachably installed on the storage tank 14 by appropriate fixing means.
さて、上記構成をなす本発明の実施の形態によれば、次のような作用効果を得ることが可能である。本発明の実施の形態では、汲み上げ管１３によって貯留槽１４に汲み上げた土砂及び水を、貯留槽１４に仮置きして土砂を沈降させる際に相当の時間を置くと共に、冷却手段１６によって、貯留槽１４内に仮置きされた土砂及び水の混合液を冷却するものである。
従って、貯留槽１４に仮置きされた土砂及び水の混合液の温度が、日射Ｓ（図２）の影響等を受けて上昇することを防ぐことができる。そして、混合液から水が分離される過程での温度上昇が、周辺水域の深層水の水温と同等程度に抑えられる場合には、水底Ｇにまで延びた排水管１５から放出される低温の返還水ＷＬは、図２に示されるように、水底Ｇの近傍に留まるようにして、水底Ｇに沿って拡散することとなる。又、若干の温度上昇が生じたとしても、周辺水域の中層水の水温と同程度に抑えられることで、この中温（深層水の水温と水面近傍の水の水温との、中間の温度）の返還水ＷＭは、図２に示されるように、水底Ｇの近傍から若干浮上したとしても中層に留まるように拡散し、水面近傍まで上昇することを防ぐことができる。よって、返還水ＷＬ、ＷＭが周辺水域の環境に変化を及ぼすこともなく、又、水底の浮泥が巻上げられて、水面付近を濁らせてしまうことも防ぐことが可能となる。
Now, according to the embodiment of the present invention configured as described above, the following operational effects can be obtained. In the embodiment of the present invention, when the earth and sand pumped into the storage tank 14 by the pumping pipe 13 is temporarily placed in the storage tank 14 and sedimented, the cooling means 16 stores the earth and sand. The mixture of earth and sand and water temporarily placed in the tank 14 is cooled.
Therefore, it is possible to prevent the temperature of the mixed liquid of earth and sand and water temporarily placed in the storage tank 14 from rising due to the influence of the solar radiation S (FIG. 2). And when the temperature rise in the process in which water is separated from the liquid mixture is suppressed to the same level as the water temperature of the deep water in the surrounding water area, the return of the low temperature discharged from the drain pipe 15 extending to the bottom G water W L, as shown in FIG. 2, so as to remain in the vicinity of the sea bed G, so that the diffuse along the sea bed G. Moreover, even if a slight temperature rise occurs, it is suppressed to the same level as the water temperature of the middle layer water in the surrounding water area, so that this medium temperature (the intermediate temperature between the water temperature of the deep layer water and the water temperature near the water surface) return water W M can be prevented that, as shown in FIG. 2, also spread to stay middle though slightly floated from the vicinity of the sea bed G, rises to the water surface near. Therefore, it is possible to prevent the return waters W L and W M from changing the environment of the surrounding water area and to prevent the floating mud from the bottom of the water from being rolled up and making the vicinity of the water surface cloudy.
又、本発明の実施の形態によれば、冷却手段１６の吸水性部材１８が、貯留槽１４内に仮置きされた土砂及び水の混合液に浸され、かつ、一部が液面の上方へと露出することにより、吸水性部材１８によって吸収した水を、いわゆる毛管現象を利用して、吸水性部材１８を介して液面の上方へと導くことができる。そして、気中において吸水性部材１８から水が蒸発する際の気化熱Ｅｈ（図２参照）により、動力を用いることなく、貯留槽１４内の土砂及び水の混合液（所定時間経過後は土砂と分離した水）を冷却することが可能となる。
なお、気化熱Ｅｈによる水温上昇の抑制効果には、本装置の設置場所における気象条件（気温、湿度、日射、風等）が影響することから、吸水性部材１８の設置態様（設置面積、設置間隔等）は、現地での事前試験等によって定めることとする。
Further, according to the embodiment of the present invention, the water absorbing member 18 of the cooling means 16 is immersed in a mixed liquid of earth and sand temporarily placed in the storage tank 14, and a part thereof is above the liquid level. By being exposed to the water, the water absorbed by the water absorbing member 18 can be guided to the upper side of the liquid level via the water absorbing member 18 by utilizing a so-called capillary phenomenon. Then, due to the heat of vaporization Eh (see FIG. 2) when water evaporates from the water absorbing member 18 in the air, the mixture of earth and sand in the storage tank 14 and the water (the earth and sand after a predetermined time has elapsed) without using power. And the separated water) can be cooled.
In addition, since the weather conditions (temperature, humidity, solar radiation, wind, etc.) in the installation location of this apparatus influence on the suppression effect of the water temperature rise by the vaporization heat Eh, the installation mode (installation area, installation) of the water absorbing member 18 is affected. Intervals etc.) shall be determined by on-site preliminary tests.
又、本発明の実施の形態では、排水管１５が、貯留槽１４の液面の上方を通るように配管され、排水管１５に吸水性部材１８が吊下げられることで、専用の吊下げ手段を用いることなく、吸水性部材１８は、貯留槽１４内に仮置きされた土砂及び水の混合液に浸され、かつ、一部が液面の上方へと露出した状態に保持することが可能となる。
更に、排水管１５と吸水性部材１８とが、熱伝達可能に固定されることすれば、気中において吸水性部材１８から水が蒸発する際の気化熱により、排水管１５の冷却も効率的に行うことが可能となり、返還水Ｗの冷却効果を、より一層高めることが可能となる。
In the embodiment of the present invention, the drain pipe 15 is piped so as to pass above the liquid level of the storage tank 14, and the water absorbing member 18 is suspended from the drain pipe 15. Without using the water absorbing member 18, the water absorbing member 18 is immersed in a mixed liquid of earth and sand temporarily placed in the storage tank 14 and can be held in a state where a part thereof is exposed above the liquid level. It becomes.
Furthermore, if the drain pipe 15 and the water absorbing member 18 are fixed so as to be able to transfer heat, the drain pipe 15 can be efficiently cooled by heat of vaporization when water evaporates from the water absorbing member 18 in the air. Thus, the cooling effect of the return water W can be further enhanced.
又、排水管１５が、貯留槽１４の液面の上方を蛇行する配管経路を有することで、排水管１５は、貯留槽１４の液面の上方における配管経路長を延ばすこととなる。そして、排水管１５に吊下げられる吸水性部材１８の設置面積を増加させ、返還水Ｗの冷却効果を高めることが可能となる。
更に、貯留槽を覆う日除け手段２０を備えることで、貯留槽１４に仮置きされた水に対する日射Ｓの影響を低減することが可能となる。
加えて、必要に応じ送風手段２２によって吸水性部材１８に風を送ることで、吸水性部材１８をいわゆる強制空冷し、気中における吸水性部材１８からの水の蒸発を促進して、返還水Ｗの冷却効果を更に高めることが可能となる。
Further, since the drain pipe 15 has a pipe path that meanders above the liquid level of the storage tank 14, the drain pipe 15 extends the pipe path length above the liquid level of the storage tank 14. And the installation area of the water absorbing member 18 suspended from the drain pipe 15 can be increased, and the cooling effect of the return water W can be enhanced.
Furthermore, by providing the sun protection means 20 that covers the storage tank, it is possible to reduce the influence of the solar radiation S on the water temporarily placed in the storage tank 14.
In addition, by sending air to the water absorbing member 18 by the blowing means 22 if necessary, the water absorbing member 18 is a so-called forced air cooling, to promote the evaporation of water from the water absorbing member 18 in the air, the return water It becomes possible to further enhance the cooling effect of W.
１０：浚渫装置、１３：汲み上げ管、１４：貯留槽、１５：排水管、１６：冷却手段、１８：吸水性部材、２０：日除け手段、２２：送風手段、Ｅｈ：気化熱、Ｇ：水底、 Ｗ、ＷＭ、ＷＬ：返還水 10: dredging device, 13: pumping pipe, 14: storage tank, 15: drainage pipe, 16: cooling means, 18: water absorbing member, 20: awning means, 22: blowing means, Eh: heat of vaporization, G: bottom of water, W, W M , W L : Return water
Claims (7)
前記冷却手段は、前記貯留槽内に仮置きされた土砂及び水の混合液に浸され、かつ、一部が液面の上方へと露出する吸水性部材を備えることを特徴とする浚渫装置。 A pumping means for pumping up sediment in the bottom together with the water in the surrounding area, a storage tank for temporarily placing the pumped sediment and water, and sedimenting the sediment, and a mixture of the sediment and water temporarily placed in the storage tank a cooling means for cooling and the aqueous separated and sediment in the storage tank, seen including a release means for returning the water,
The dredging apparatus characterized in that the cooling means includes a water absorbing member that is immersed in a mixed liquid of earth and sand and water temporarily placed in the storage tank, and a part of which is exposed above the liquid level .
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| JP2002019693A (en) * | 2000-07-05 | 2002-01-23 | Nishi Nippon Kaiyo Kk | Sea sand gathering work ship |
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