JP4754973B2 - Bagging dewatering method - Google Patents

Bagging dewatering method Download PDF

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JP4754973B2
JP4754973B2 JP2006013159A JP2006013159A JP4754973B2 JP 4754973 B2 JP4754973 B2 JP 4754973B2 JP 2006013159 A JP2006013159 A JP 2006013159A JP 2006013159 A JP2006013159 A JP 2006013159A JP 4754973 B2 JP4754973 B2 JP 4754973B2
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bag body
sand
water
filling
bag
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JP2007190523A (en
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博之 佐伯
昌由 杉本
友一朗 弘瀬
治久 田所
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Shintec Co Ltd
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Description

本発明は、泥土、特に粘性土やシルトの泥土等の含水土砂を、透水性袋体内に充填して脱水を行う袋詰脱水処理方法に関するものである。   TECHNICAL FIELD The present invention relates to a bagging and dewatering treatment method in which water-containing earth and sand such as mud soil, particularly viscous soil and silt mud is filled in a permeable bag and dewatered.

河川、湖沼、海洋などから浚渫された高含水比の泥土等の含水土砂を脱水処理し、有効利用を図る方法の一つとして、透水性布帛等からなる袋体に泥土を充填し、水分を袋体外に透過させることにより脱水を図る袋詰脱水方法がある(特許文献1参照)。この方法によれば、含水土砂を土質改良して土工材料として再利用する、もしくは、環境汚染物質を含有する泥土を脱水・減量化して封じ込めることが可能となる。
しかしながら、河川等から浚渫された含水土砂は、掘削時の撹拌作用により含水比が上昇し、しかもその含水比が安定しないため、袋体への充填量を一定にしても充填土砂量が安定せず、脱水速度および減量率が異なり、山積みでの保管や利用が困難になる、あるいは施工計画や施工管理が困難になるといった問題点があった。
特開2002−178000号公報
As one of the methods for dehydrating the high-water content mud soil dredged from rivers, lakes, oceans, etc. and making effective use, the mud is filled into the bag body made of permeable fabric etc. There is a bag dehydration method for dehydrating by allowing it to permeate outside the bag body (see Patent Document 1). According to this method, it is possible to improve the soil quality of the hydrous sand and reuse it as an earthwork material, or to dewater and reduce the amount of mud containing an environmental pollutant and contain it.
However, the water content of dredged soil dredged from rivers, etc. increases due to the agitation action during excavation, and the water content ratio is not stable. However, the dehydration rate and the weight loss rate are different, which makes it difficult to store and use in piles, or to make construction planning and management difficult.
JP 2002-178000 A

そこで、本発明の主たる課題は、袋体への充填土砂量を安定化することにある。   Then, the main subject of this invention is to stabilize the amount of earth and sand with which a bag is filled.

上記課題を解決した本発明は次記のとおりである。
<請求項1記載の発明>
含水土砂を透水性袋体内に充填し、この袋体内容物のうち水分を袋体外に透過させて脱水する袋詰脱水処理工法において、
含水土砂の重量を計測する重量計測工程と、
重量を計測した含水土砂に対して、その重量計測結果ならびに含水土砂の既知の含水比に基づいて、所定の含水比となるように加水する加水工程と、
前記加水した含水土砂から所定量の含水土砂を量り取る計量工程と、
前記計量工程で量り取った含水土砂を前記袋体内に充填する充填工程とを行い
充填土砂量の安定した含水土砂充填袋体を製造するとともに、製造した含水土砂充填袋体を山積みで保管又は利用する、
ことを特徴とする袋詰脱水処理方法。
The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
In the bag-containing dewatering treatment method, the hydrated earth and sand are filled into the water-permeable bag body, and moisture is permeated out of the bag body to dehydrate the bag contents.
A weight measuring step for measuring the weight of the hydrous sand,
For the hydrous sand whose weight has been measured, based on the weight measurement result and the known water content of the hydrous sand, a water adding step for adding water to a predetermined water content ratio;
A measuring process that collected weighed prescribed amount of water sediment from the hydrolysis and water-containing sand,
Perform a filling step of filling a water sediment was weighed in the metering step to the bag body,
Manufacture hydrated earth and sand filled bags with stable amount of filled earth and sand, and store or use the produced hydrated earth and sand filled bags in piles.
A bagging dehydration method characterized by the above.

(作用効果)
本発明では、含水土砂を加水により予め所定の含水比にした後に、計量充填する。よって、袋体への充填土砂量を安定化できる。また、充填土砂量を安定化できるため、脱水速度および減量率を均一化でき、山積みによる保管等が容易になる。さらに、施工計画や施工管理もより容易になる。
(Function and effect)
In the present invention, the hydrated earth and sand is preliminarily adjusted to a predetermined moisture content by water, and then metered and filled. Therefore, the amount of earth and sand filled in the bag can be stabilized. Moreover, since the amount of filled earth and sand can be stabilized, the dewatering speed and the weight reduction rate can be made uniform, and storage by piles and the like becomes easy. Furthermore, construction planning and construction management become easier.

<請求項2記載の発明>
前記計量工程で、前記量り取った含水土砂の一部をサンプリングして含水比を計測した後、前記充填工程で前記袋体内への充填を行う、請求項1記載の袋詰脱水処理方法。
<Invention of Claim 2>
Wherein the weighing step, after measuring the water content ratio by sampling a portion of the weighed took water sediment, performs filling of the bag body in the filling process, according to claim 1 sacked dehydration method according.

(作用効果)
このように、袋体へ充填する含水土砂の容積および含水比を計測することで、一袋にどの程度の含水比のものをどの程度の量詰めたのか、ならびに一袋にどの程度の量の土砂が残るのかを、正確に管理できるようになる。
(Function and effect)
In this way, by measuring the volume and water content of the hydrous sand that fills the bag, how much water content is packed in one bag, and how much is packed in one bag It will be possible to accurately manage whether or not earth and sand remain.

<請求項3記載の発明>
前記加水工程において、前記含水土砂を撹拌によりしつつ水を添加混合する、請求項1または2記載の袋詰脱水処理方法。
<Invention of Claim 3>
Wherein at hydrolytically step, the while the water sediment was solution by agitation mixing addition of water, according to claim 1 or 2 bags packed dehydration method according.

(作用効果)
充填する含水土砂中に土砂の塊があると、取り扱いが困難になるとともに、塊部分が脱水性に劣ることにより、脱水速度が遅くなり、減量率が袋体によって異なるおそれがある。この傾向は、特に対象が粘性土である場合に顕著である。これに対して、本項記載のように、充填に先立って含水土砂を解すようにすると、これらの問題の発生を抑制できる。
(Function and effect)
When there is a lump of earth and sand in the hydrated earth and sand to be filled, handling is difficult, and the lump part is inferior in dewaterability, so that the dehydration rate is slow and the weight loss rate may vary depending on the bag. This tendency is particularly noticeable when the object is clay soil. On the other hand, as described in this section, the occurrence of these problems can be suppressed by removing the hydrous sand prior to filling.

<請求項4記載の発明>
前記重量計測手段による重量計測に先立って、前記含水土砂中の粗雑物を振動篩装置により分離除去する、請求項1〜3のいずれか1項に記載の袋詰脱水処理方法。
<Invention of Claim 4>
The bagging dewatering processing method according to any one of claims 1 to 3, wherein a coarse substance in the hydrous sand is separated and removed by a vibration sieve device prior to the weight measurement by the weight measuring means.

(作用効果)
河川等から浚渫される含水土砂は、ゴミや廃棄物、ガラ等の粗雑物が多く含まれているため、その粗雑物を除去しないと袋体や装置が破損するおそれがある。よって、本項記載のように、早い段階で含水土砂中の粗雑物を分離除去するのは好ましい。
(Function and effect)
The hydrous sand dredged from rivers and the like contains a lot of trash, waste, garbage, and other trash, so there is a risk of damage to the bag and the device unless the trash is removed. Therefore, as described in this section, it is preferable to separate and remove coarse substances in the hydrous sand at an early stage.

<請求項5記載の発明>
所定の容積を有する複数の計量容器を用い、常に少なくとも一つの計量容器を前記計量工程中とし、かつ他の少なくとも一つの計量容器を、当該計量容器内の含水土砂をポンプにより前記袋体内へ充填する充填工程中として、連続的な計量及び充填を行う、請求項1〜4のいずれか1項に記載の袋詰脱水処理方法。
<Invention of Claim 5>
A plurality of metering containers having a predetermined volume, always at least one metering vessel and during the metering step, and the other of the at least one measuring container, filled with water sediment of the metering container to the bag body by a pump The bagging dewatering method according to any one of claims 1 to 4 , wherein continuous weighing and filling are performed during the filling step .

(作用効果)
従来、小型の袋体を用いる場合、袋詰に際しては、バックホウで含水土砂を掬い上げ、計量ホッパーを介して袋体内に投入するバックホウ充填方式が採用されてきた。
しかしながら、バックホウ充填方式は作業能率が低く、大量施工に不向きであるといった問題点や、充填時に含水土砂が飛散し易く、含水土砂が環境汚染物質を含有している場合、充填時に袋体周辺を逆に汚染させるといった問題点を有していた。
よって、充填方式としては、含水土砂をポンプにより圧送し充填するポンプ充填方式が好適である。
(Function and effect)
Conventionally, when a small bag is used, a backhoe filling method has been adopted in which water-containing earth and sand are scooped up with a backhoe and put into the bag through a measuring hopper when packing.
However, the backhoe filling method has problems such as low work efficiency and is not suitable for large-scale construction, and the water-containing earth and sand easily scatters during filling. On the other hand, there was a problem of contamination.
Therefore, as the filling method, a pump filling method in which hydrous sand is pumped and filled with a pump is suitable.

<請求項6記載の発明>
前記充填工程で、ポンプを用いて前記袋体内への充填を行うとともに、
前記袋体の膨張度合いを検出する検出手段として前記袋体の両側にスタンドを立て、その間の所定検出高さに検出糸を張り渡し、検出糸の一端を一方のスタンドに固定し、検出糸の他端を他方のスタンド上部に設けたリールに巻きつけて連結するとともに、リールの回転によりオン・オフされるスイッチを設け、
前記袋体が膨張して前記検出糸を引っ張り、リールが検出糸の巻き出しにより回転してスイッチがオンとなった時点で、前記袋体が所定の膨張度合いに達したことが検出された時点として自動的に前記ポンプを停止させる、請求項1〜のいずれか1項に記載の袋詰脱水処理方法。
<Invention of Claim 6>
In the filling step, filling the bag body using a pump,
As detection means for detecting the degree of expansion of the bag body, stands are placed on both sides of the bag body, the detection yarn is stretched over a predetermined detection height therebetween, one end of the detection yarn is fixed to one stand, and the detection yarn The other end is wound around and connected to a reel provided on the other stand, and a switch that is turned on and off by the rotation of the reel is provided.
When it is detected that the bag body has reached a predetermined degree of expansion when the bag body expands and pulls the detection yarn, the reel rotates by unwinding the detection yarn and the switch is turned on. automatically stops the pump as, sacked dehydration method according to any one of claims 1-5.

(作用効果)
ポンプにより袋体への充填を行う場合、過度の充填により袋体が破裂するおそれがある。しかし、目視で袋体を監視するのは非常に煩雑である。よって、本項記載のように、袋体の膨張度合いを検出して、破裂に至る前に自動でポンプを停止させるのが好ましい。
(Function and effect)
When filling the bag body with a pump, the bag body may burst due to excessive filling. However, it is very complicated to visually monitor the bag body. Therefore, as described in this section, it is preferable to detect the degree of expansion of the bag and automatically stop the pump before rupture.

以上のとおり、本発明によれば、袋体への充填土砂量が安定化する等の利点がもたらされる。   As described above, according to the present invention, there are advantages such as stabilization of the amount of earth and sand filled in the bag.

以下、本発明の一実施形態について添付図面を参照しつつ詳説する。
図1は、処理設備例を示している。本例は、河川や湖沼等の底に存在する泥土、ヘドロ等の含水土砂を、付近の岸辺で処理するのに好適であるが、含水土砂であれば泥土でなくても適用でき、また処理場所にも限定されないことはいうまでもない。
Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 shows an example of processing equipment. This example is suitable for treating mud soil and sludge such as sludge existing in the bottom of rivers and lakes on the nearby shore. Needless to say, the place is not limited.

図示形態についてより詳細に説明すると、処理対象の含水土砂1は、先ず分離除去装置2に供給され、ゴミや廃棄物、ガラ等の粗雑物2xが分離除去される。分離除去装置2は特に限定されるものではないが、対象の性質を考慮すると振動篩装置が好適である。また、処理対象の含水土砂1は、付近に設置した処理ピット等に一時的に貯留しておき、処理分量をバックホウ等により汲み出して供給するのが好ましい。   The illustrated embodiment will be described in more detail. The hydrous sand 1 to be treated is first supplied to the separation / removal device 2 to separate and remove coarse substances 2x such as dust, waste, and waste. The separation / removal device 2 is not particularly limited, but a vibration sieve device is preferable in consideration of the properties of the object. Moreover, it is preferable that the hydrous sand 1 to be treated is temporarily stored in a treatment pit or the like installed in the vicinity and the treated amount is pumped out by a backhoe or the like and supplied.

粗雑物2xを分離除去した含水土砂1は、次いで、図示しないポンプ等により重量計測手段3に供給される。重量計測手段3は、含水土砂1をバッチ式もしくは連続式で計測できるものであれば特に限定されないが、ロードセルを介してホッパーを支持し、含水土砂1をホッパー毎計測した後、ホッパー重量を差し引くタイプのものを好適に用いることができる。   The hydrous sand 1 from which the coarse matter 2x has been separated and removed is then supplied to the weight measuring means 3 by a pump or the like (not shown). The weight measuring means 3 is not particularly limited as long as it can measure the hydrous sand 1 in a batch or continuous manner, but supports the hopper via the load cell, measures the hydrous sand 1 for each hopper, and then subtracts the hopper weight. The thing of a type can be used conveniently.

次いで、重量を計測した含水土砂1は、加水手段4に供給され、重量計測結果ならびに含水土砂1の既知の含水比に基づいて、所定の含水比となるように加水する。このために、処理対象の含水土砂1がどの程度の含水比であるのか、予め計測しておく。この計測は、含水比が大きく変動する度、例えば含水土砂1の種類、浚渫場所、日時等が変わる度に行うことができる。   Next, the hydrated earth and sand 1 whose weight has been measured is supplied to the hydration means 4 and hydrated to a predetermined moisture content based on the weight measurement result and the known moisture content of the hydrated earth and sand 1. For this purpose, it is measured in advance how much the moisture content of the hydrous sand 1 to be treated is. This measurement can be performed every time the water content ratio fluctuates greatly, for example, every time the type, dredging location, date, etc. of the water-containing earth and sand 1 changes.

加水手段4としては、含水土砂1に水を添加できるものであれば特に限定されないが、二軸ミキサー等のように含水土砂1を撹拌により解しつつ混合を行う装置を好適に用いることができる。符号5は、加水のため水を貯留する貯水槽である。   The hydration means 4 is not particularly limited as long as water can be added to the hydrous sand 1, but an apparatus that performs mixing while unraveling the hydrous sand 1 by stirring, such as a biaxial mixer, can be suitably used. . Reference numeral 5 denotes a water storage tank that stores water for hydration.

図示形態では、加水手段4で加水された含水土砂1は、次に貯留手段6に供給され、一時的に貯留される。貯留手段6としては、アジテーター等、固化しないよう撹拌しつつ貯留を行うものが好ましいが、そのような機能の無い単なる貯留槽を用いることもできる。また、貯留手段6は省略することもできる。   In the illustrated form, the hydrous sand 1 hydrated by the hydration means 4 is then supplied to the storage means 6 and temporarily stored. The storage means 6 is preferably an agitator or the like that performs storage while stirring so as not to solidify, but a simple storage tank having no such function can also be used. Further, the storage means 6 can be omitted.

また、以上の分離除去装置2から貯留手段6までの部分を一体化し、大型車(15t程度)の車両に搭載できるようにコンパクト化しておくと好ましい。   Moreover, it is preferable to integrate the parts from the separation / removal device 2 to the storage means 6 and make them compact so that they can be mounted on a large vehicle (about 15 t).

加水処理により所定の含水比となった含水土砂1は、計量手段7により所定量が量り取られた後、充填手段8により透水性袋体9内に充填される。   The water-containing earth and sand 1 having a predetermined water content ratio due to the hydration treatment is weighed by the measuring means 7 and then filled into the water-permeable bag 9 by the filling means 8.

計量手段7は、特に限定されるものではないが、図示例では、所定の容積(例えば袋体と同じか複数倍、または複数分の1倍の容積とするのが好ましい)を有する計量容器7Cと、計量容器7C内に含水土砂1を供給する計量ポンプ7Pと、計量容器7Cから充填手段8への供給路に設けられた出側バルブ7Vとにより構成されている。出側バルブ7Vを閉じた状態で計量ポンプ7Pを作動させることで、貯留手段6内の含水土砂1を計量容器7C内に供給して所定分量を量り取ることができ、計量ポンプ7Pを停止した状態で出側バルブ7Vを開けることで、計量容器7Cで計量した含水土砂1を充填手段8に供給することができる。   The measuring means 7 is not particularly limited, but in the illustrated example, the measuring container 7C having a predetermined volume (for example, preferably the same volume as the bag body, a plurality of times, or a volume that is a part of a plurality of times). And a measuring pump 7P for supplying the hydrous sand 1 into the measuring container 7C, and an outlet valve 7V provided in a supply path from the measuring container 7C to the filling means 8. By operating the metering pump 7P with the outlet valve 7V closed, the hydrous sand 1 in the storage means 6 can be supplied into the metering container 7C to measure a predetermined amount, and the metering pump 7P is stopped. By opening the outlet valve 7V in the state, the hydrous sand 1 measured in the measuring container 7C can be supplied to the filling means 8.

より好ましい形態では、計量容器7C内の含水土砂1の含水比を計測するために、含水比計測手段が設けられる。含水比計測手段としては、公知の土壌用水分計を用いることができ、計量容器7C内に含水土砂1が供給される度に、一部をサンプリングして含水比を計測した後、充填手段8により袋体9内に充填するように構成するのが好ましい。袋体9は、形状により限定されるものではないが、例えば、図4にも示すような筒状に突出する注入口部9iを有するものを好適に用いることができる。   In a more preferred form, a moisture content measuring means is provided in order to measure the moisture content of the hydrous soil 1 in the measuring container 7C. As the moisture content measuring means, a known soil moisture meter can be used. Each time the moisture containing sand 1 is supplied into the measuring container 7C, a part is sampled and the moisture content is measured, and then the filling means 8 is used. It is preferable that the bag 9 is filled with the above. Although the bag body 9 is not limited by the shape, for example, a bag body having an injection port portion 9i protruding in a cylindrical shape as shown in FIG. 4 can be preferably used.

また、充填手段8は、例えば図示のように、充填ポンプ8Pにより計量容器7C内の含水土砂1を抜き出し、充填管路8Lを介して袋体9内に圧送する形態を採用することができる。充填管路8Lは、例えば図2及び図3に示すように、バックホウ10のアーム11により支持することができる。もちろん、架台等の適宜の支持装置を用いることができるが、充填管路8Lの位置移動が可能なものが好ましい。   Moreover, the filling means 8 can employ | adopt the form which draws out the hydrous soil 1 in the measuring container 7C with the filling pump 8P, and pumps it in the bag body 9 via the filling pipe line 8L, for example like illustration. The filling pipe line 8L can be supported by the arm 11 of the backhoe 10 as shown in FIGS. Of course, an appropriate support device such as a gantry can be used, but one that can move the position of the filling pipe line 8L is preferable.

袋体9への計量充填に際して、上述のようなバッチ式の計量手段7を用いると、計量中は充填作業ができないため作業効率が低下する。よって、図示のように、計量容器7Cを複数組設け、各計量容器7Cの入側及び出側にそれぞバルブ7W,7Vを設け、バルブの切り替えにより、各計量容器の給排を切り替え可能に構成するのが好ましい。これによって、例えば、常に少なくとも一つの計量容器7Cを計量中とし、他の少なくとも一つを排出中とすることができ、連続的な計量が可能になる。また、併せて、充填管路8Lを複数設け、各充填管路8Lに充填バルブ8Vを設ける等により、使用する充填管路8Lを切り替え可能にするのが好ましい。この場合、常に、少なくとも一本の充填管路8Lを介して袋体9への充填を行いながら、他の少なくとも一本の充填管路8Lについては充填を行わずに、充填する袋体9の交換作業を行うことができ、効率良い充填が可能になる。 When the bag 9 is weighed and filled, when the batch-type weighing means 7 as described above is used, the filling operation cannot be performed during the weighing, so that the work efficiency is lowered. Thus, as shown, the weighing container 7C a plurality of sets, the entry side and exit their respective on side valve 7W, the 7V provided for each of the weighing container 7C, by switching the valve, switchable feed and discharge of the weighing container It is preferable to configure. As a result, for example, at least one weighing container 7C can be constantly being weighed, and at least one other can be discharged, so that continuous weighing is possible. In addition, it is preferable that the filling line 8L to be used can be switched by providing a plurality of filling lines 8L and providing each filling line 8L with a filling valve 8V. In this case, while always filling the bag body 9 through at least one filling pipe line 8L, the filling of the bag body 9 to be filled is performed without filling the other at least one filling pipe line 8L. Exchange work can be performed, and efficient filling becomes possible.

この複数の充填管路8Lを用いる場合におけるより具体的な例が図2及び図3に示されている。すなわち、バックホウ10のアーム11の先端部には支持部12が取り付けられており、この支持部12には充填管路8Lの数と対応する数のスイベル12sが上下方向に沿って並設されている。充填管路8Lの基端側部分20は各スイベル12sを介して先端側部分21に連結されている。充填管路8Lの先端側部分21はスイベル位置から側方に屈曲して延在しており、その先端に設けられた袋体取付部30は、スイベル12sの回転中心に対して所定の回転半径、例えば袋体9の設置間隔の半分よりも大きな回転半径をもって、自由に回転するように構成されている。したがって、図3に示すように、この袋体取付部30の回転軌跡下に袋体9の注入口部9iが位置するように、袋体9を複数配置しておけば、袋体取付部30を次の袋体9に取り付けるにあたり、充填管路8L全体を移動させずに先端の袋体取付部30のみを回動させるだけで位置決めが可能となり、作業が容易になる。なお、この形態において、袋体取付部30の移動範囲外の位置にある袋体9に対して注入を行う場合には、アーム11により支持部12を移動する、あるいはバックホウ10自体を移動させることにより対応できる。   A more specific example in the case of using the plurality of filling pipe lines 8L is shown in FIGS. That is, a support portion 12 is attached to the distal end portion of the arm 11 of the backhoe 10, and a number of swivels 12 s corresponding to the number of the filling pipe lines 8 </ b> L are provided on the support portion 12 along the vertical direction. Yes. The proximal end side portion 20 of the filling pipe line 8L is connected to the distal end side portion 21 via each swivel 12s. The front end side portion 21 of the filling pipe line 8L is bent and extended laterally from the swivel position, and the bag mounting portion 30 provided at the front end thereof has a predetermined rotation radius with respect to the rotation center of the swivel 12s. For example, it is configured to freely rotate with a radius of rotation larger than half of the installation interval of the bag body 9. Therefore, as shown in FIG. 3, if a plurality of bag bodies 9 are arranged so that the inlet 9 i of the bag body 9 is positioned under the rotation locus of the bag body mounting section 30, the bag body mounting section 30. Is attached to the next bag body 9, positioning is possible by rotating only the front bag body mounting portion 30 without moving the entire filling pipe line 8L, and the work is facilitated. In this embodiment, when injecting into the bag body 9 at a position outside the movement range of the bag body mounting portion 30, the support portion 12 is moved by the arm 11, or the backhoe 10 itself is moved. It can respond by.

他方、含水土砂1が透水性袋体9内に充填されると、水分だけが袋体5外に透過排出され、土粒子等の固形分は袋体5内に残留し、封じ込められる。排水は非常に綺麗であるので、有害物質の心配がない場合には、排水溝6を介してそのまま又は必要に応じて適宜の浄化処理をおこなった後に元の河川等1に放流することもできる。好適には、含水土砂1は袋体9内に圧入される。これにより、その充填圧により袋体内容物が加圧脱水されるので、高効率での袋詰および脱水を行うことができる。ただし、圧入せずに、注入した含水土砂1の自重による加圧および水分の蒸発により脱水させたり、注入済み袋体を順次積み重ねて下側の袋体を加圧脱水したり、注入済み袋体を機械的に加圧脱水することもできる。   On the other hand, when the water-containing earth and sand 1 is filled in the water-permeable bag 9, only moisture is permeated and discharged out of the bag 5, and solid contents such as soil particles remain in the bag 5 and are contained. Since the drainage is very beautiful, if there is no concern about harmful substances, it can be discharged into the original river 1 or the like through the drainage channel 6 as it is or after performing an appropriate purification treatment as necessary. . Preferably, the hydrous sand 1 is press-fitted into the bag body 9. As a result, the bag contents are pressure-dehydrated by the filling pressure, so that highly efficient bagging and dehydration can be performed. However, without press-fitting, it is dehydrated by pressurization and evaporation of moisture due to its own weight of the injected hydrous sand 1 or by sequentially stacking the injected bags and depressurizing the lower bag, Can be mechanically pressurized and dehydrated.

袋体9に含水土砂1を圧入する場合、過度の充填により袋体9が破裂するおそれがある。しかし、目視で袋体を監視するのは非常に煩雑である。よって、図5に示すように、袋体9の膨張度合いを検出する検出装置100を設け、袋体9が破裂に至る前に自動で充填ポンプ8Pを停止させるように構成するのが好ましい。具体的に、図示の検出装置100は、袋体の両側にスタンド101を立てて、その間の所定検出高さに検出糸102を張り渡し、検出糸102の一端を一方のスタンド101に固定し、他端を他方のスタンド101上部に設けたリール103に巻きつけて連結するとともに、リール103の回転によりオン・オフされる図示しないスイッチを設けたものであり、袋体9が膨張して検出糸102を引っ張ると、リール103が検出糸102の巻き出しにより回転して、スイッチがオンとなり、検出信号が充填ポンプ8Pの制御装置に送信されるものである。このような接触式の検出装置の他、赤外線通過センサー等を検出高さに設置することもできる。   When the hydrous sand 1 is pressed into the bag body 9, the bag body 9 may burst due to excessive filling. However, it is very complicated to visually monitor the bag body. Therefore, as shown in FIG. 5, it is preferable to provide a detection device 100 for detecting the degree of expansion of the bag body 9 so that the filling pump 8P is automatically stopped before the bag body 9 ruptures. Specifically, the illustrated detection apparatus 100 stands up on both sides of the bag body, stretches the detection yarn 102 to a predetermined detection height therebetween, fixes one end of the detection yarn 102 to one stand 101, The other end is wound and connected to a reel 103 provided on the upper portion of the other stand 101, and a switch (not shown) that is turned on / off by the rotation of the reel 103 is provided. When 102 is pulled, the reel 103 is rotated by the unwinding of the detection yarn 102, the switch is turned on, and the detection signal is transmitted to the control device of the filling pump 8P. In addition to such a contact-type detection device, an infrared passage sensor or the like can be installed at the detection height.

袋詰脱水では、透水性袋体9の目合いの粗さによって、注入開始からフィルター効果を十分に発揮するまでの時間には差はあるが、いずれにせよある程度まで注入すれば十分なフィルター効果が発揮される。よって、基本的には袋体9の目合いの粗さは問わないが、注入当初からある程度十分なフィルター効果を発揮させるためには、透水性袋体9としては、透水係数が1.0×10-3cm/sec以上、水透過孔径が90〜600μmのものが好ましい。また耐酸性、耐アルカリ性が高く化学的に安定しているという観点から、ポリエステルやポリプロピレン繊維等の化学繊維からなる不織布、織布、編物等により形成した袋体を好適に使用することができる。具体的な透水性袋体9の例を表1に示す。 In bag dehydration, there is a difference in the time from the start of injection until the filter effect is fully exerted depending on the roughness of the water-permeable bag body 9, but in any case, it is sufficient to inject it to some extent. Is demonstrated. Therefore, basically, the roughness of the mesh of the bag body 9 is not questioned, but in order to exert a filter effect that is sufficiently high from the beginning of injection, the water permeability coefficient of the water-permeable bag body 9 is 1.0 ×. The thing of 10 < -3 > cm / sec or more and a water permeation | transmission hole diameter of 90-600 micrometers is preferable. Further, from the viewpoint of high acid resistance and alkali resistance and chemical stability, a bag formed of a nonwoven fabric, a woven fabric, a knitted fabric or the like made of a chemical fiber such as polyester or polypropylene fiber can be preferably used. A specific example of the water-permeable bag 9 is shown in Table 1.

Figure 0004754973
Figure 0004754973

特に、前述のように含水土砂1を圧入するときには、袋体9が膨張し破壊する虞があるので、予め袋外9周囲に引っ張り強度の高いジオグリッド等の補強材を巻き付けておく等により補強された袋体9を用いることができる。   In particular, when the hydrous sand 1 is press-fitted as described above, the bag body 9 may expand and break, so that it is reinforced by, for example, winding a reinforcing material such as a geogrid with high tensile strength around the outside of the bag 9 in advance. The made bag 9 can be used.

またフィルター効果を高めるためには、袋体9を複数枚重ねた多重袋体を用いることで、含水土砂1中の粒子捕捉効果を高めることができ、袋体9の強度も向上する。この場合において、異なる素材の袋体9を組み合わせて重ねることもできる。   Further, in order to enhance the filter effect, by using a multiple bag body in which a plurality of bag bodies 9 are stacked, the particle capturing effect in the hydrous sand 1 can be enhanced, and the strength of the bag body 9 is also improved. In this case, the bag bodies 9 made of different materials can be combined and stacked.

その他、特願平8−21437号、特願平10−37151号、特願平8−59964号、特願平8−188203号および特願平11−030139号に記載された脱水用袋体など、公知の脱水用袋体を使用することができる。なお、これら従来の脱水技術は、本願発明のように有害物質含有泥土類を対象として有害物質を袋体内に封じ込めるものではない。   In addition, the bag for dehydration described in Japanese Patent Application No. 8-21437, Japanese Patent Application No. 10-37151, Japanese Patent Application No. 8-59964, Japanese Patent Application No. 8-188203, and Japanese Patent Application No. 11-030139, etc. A known dehydrating bag can be used. Note that these conventional dehydration techniques do not contain harmful substances in the bag for the harmful substance-containing mud soil as in the present invention.

他方、泥土等の含水土砂1には、有害物質(環境汚染物質)を含む場合があるが、多くの有害物質、特にダイオキシン、PCB、砒素、鉛、などの有害物質の多くは、土粒子やその他の懸濁粒子に付着して存在している。よって、上記のように袋詰脱水を行うと、これらの有害物質は袋体9内に封じ込められる。   On the other hand, the hydrous soil 1 such as mud may contain harmful substances (environmental pollutants), but many harmful substances, especially dioxins, PCBs, arsenic, lead and other harmful substances, It is attached to other suspended particles. Therefore, when dehydration is performed as described above, these harmful substances are contained in the bag body 9.

このような有害物質を含む含水土砂1としては、その存在場所に応じて多少の広狭があり、一概には言えないが、「土壌の汚染に係る環境基準について(平成3年8月23日、環境庁告示第46号)」、「排水基準を定める総理府令(昭和46年6月21日、総理府令第35号)」、「地下水の水質汚濁に係る環境基準について(平成9年3月13日、環境庁告示第10号)」、「水質汚濁に係る環境基準について(昭和46年12月28日、環境庁告示第59号)」、「農用地の土壌の汚染防止等に関する法律(昭和45年12月25日、法律第139号)」、「ダイオキシン類による大気の汚染、水質の汚濁及び土壌の汚染に係る環境基準(平成11年12月27日、環境庁告示第68号)」等の各種法規や運用基準等の基準に適合しないものを意味する。具体的な有害物質の例とともに各種基準を表2及び表3に示す。   As the hydrous sand 1 containing such harmful substances, there are some widths depending on the location, and it cannot be generally stated, but “Environmental standards related to soil contamination (August 23, 1991, "Environmental Agency Notification No. 46)", "Prime Ministerial Ordinance Establishing Drainage Standards (June 21, 1971, Prime Minister Ordinance No. 35)", "Environmental Standards Concerning Groundwater Water Pollution (March 13, 1997) Japan Environmental Agency Notification No. 10) ”,“ Environmental Standards Concerning Water Pollution (December 28, 1971, Environmental Agency Notification No. 59) ”,“ Act on the Prevention of Soil Contamination of Agricultural Land (Showa 45) December 25, 1993, Law No. 139), “Environmental Standards Concerning Air Pollution, Water Pollution, and Soil Contamination by Dioxins (December 27, 1999, Environmental Agency Notification No. 68)”, etc. Do not conform to standards such as various laws and operational standards It means a thing. Various standards are shown in Tables 2 and 3 together with specific examples of harmful substances.

Figure 0004754973
Figure 0004754973

Figure 0004754973
Figure 0004754973

本発明は、河川、湖沼、海洋などから浚渫された泥土等の含水土砂を脱水処理し、有効利用を図る際等に適用できるものである。   INDUSTRIAL APPLICABILITY The present invention can be applied to dewatering hydrous soil such as mud dredged from rivers, lakes, oceans, etc. for effective use.

本発明の実施形態の概略図である。It is the schematic of embodiment of this invention. 充填態様を示す正面図である。It is a front view which shows a filling aspect. 充填態様を示す平面図である。It is a top view which shows a filling aspect. (a)膨張前、(b)膨張後の透水性袋体の例を示す斜視図である。It is a perspective view which shows the example of the water-permeable bag body before (a) expansion | swelling and (b) expansion | swelling. 袋体の膨張度合い検出手段の正面図である。It is a front view of the expansion degree detection means of a bag.

1…含水土砂、2…分離除去手段、3…重量計測手段、4…加水手段、5…貯水槽、6…貯留手段、7…計量手段、7C…計量容器、7P…計量ポンプ、7V…出側バルブ、7W…入側バルブ、8…充填手段、8P…充填ポンプ、8L…充填管路、8V…充填バルブ、9…袋体、9i…注入口部、10…バックホウ、11…アーム、12…支持部、12s…スイベル、20…基端側部分、21…先端側部分、30…袋体取付部、100…検出装置、101…スタンド、102…検出糸、103…リール。   DESCRIPTION OF SYMBOLS 1 ... Water-containing earth and sand, 2 ... Separation removal means, 3 ... Weight measurement means, 4 ... Water addition means, 5 ... Water storage tank, 6 ... Storage means, 7 ... Measuring means, 7C ... Measuring container, 7P ... Measuring pump, 7V ... Out Side valve, 7W ... Inlet side valve, 8 ... Filling means, 8P ... Filling pump, 8L ... Filling conduit, 8V ... Filling valve, 9 ... Bag body, 9i ... Inlet port, 10 ... Backhoe, 11 ... Arm, 12 DESCRIPTION OF SYMBOLS ... Support part, 12s ... Swivel, 20 ... Base end side part, 21 ... Tip side part, 30 ... Bag body attaching part, 100 ... Detection apparatus, 101 ... Stand, 102 ... Detection thread, 103 ... Reel.

Claims (6)

含水土砂を透水性袋体内に充填し、この袋体内容物のうち水分を袋体外に透過させて脱水する袋詰脱水処理工法において、
含水土砂の重量を計測する重量計測工程と、
重量を計測した含水土砂に対して、その重量計測結果ならびに含水土砂の既知の含水比に基づいて、所定の含水比となるように加水する加水工程と、
前記加水した含水土砂から所定量の含水土砂を量り取る計量工程と、
前記計量工程で量り取った含水土砂を前記袋体内に充填する充填工程とを行い
充填土砂量の安定した含水土砂充填袋体を製造するとともに、製造した含水土砂充填袋体を山積みで保管又は利用する、
ことを特徴とする袋詰脱水処理方法。
In the bag-containing dewatering treatment method, the hydrated earth and sand are filled into the water-permeable bag body, and moisture is permeated out of the bag body to dehydrate the bag contents.
A weight measuring step for measuring the weight of the hydrous sand,
For the hydrous sand whose weight has been measured, based on the weight measurement result and the known water content of the hydrous sand, a water adding step for adding water to a predetermined water content ratio;
A measuring process that collected weighed prescribed amount of water sediment from the hydrolysis and water-containing sand,
Perform a filling step of filling a water sediment was weighed in the metering step to the bag body,
Manufacture hydrated earth and sand filled bags with stable amount of filled earth and sand, and store or use the produced hydrated earth and sand filled bags in piles.
A bagging dehydration method characterized by the above.
前記計量工程で、前記量り取った含水土砂の一部をサンプリングして含水比を計測した後、前記充填工程で前記袋体内への充填を行う、請求項1記載の袋詰脱水処理方法。 Wherein the weighing step, after measuring the water content ratio by sampling a portion of the weighed took water sediment, performs filling of the bag body in the filling process, according to claim 1 sacked dehydration method according. 前記加水工程において、前記含水土砂を撹拌によりしつつ水を添加混合する、請求項1または2記載の袋詰脱水処理方法。 Wherein at hydrolytically step, the while the water sediment was solution by agitation mixing addition of water, according to claim 1 or 2 bags packed dehydration method according. 前記重量計測手段による重量計測に先立って、前記含水土砂中の粗雑物を振動篩装置により分離除去する、請求項1〜3のいずれか1項に記載の袋詰脱水処理方法。 The bagging dewatering processing method according to any one of claims 1 to 3, wherein a coarse substance in the hydrous sand is separated and removed by a vibration sieve device prior to the weight measurement by the weight measuring means. 所定の容積を有する複数の計量容器を用い、常に少なくとも一つの計量容器を前記計量工程中とし、かつ他の少なくとも一つの計量容器を、当該計量容器内の含水土砂をポンプにより前記袋体内へ充填する充填工程中として、連続的な計量及び充填を行う、請求項1〜4のいずれか1項に記載の袋詰脱水処理方法。 A plurality of metering containers having a predetermined volume, always at least one metering vessel and during the metering step, and the other of the at least one measuring container, filled with water sediment of the metering container to the bag body by a pump The bagging dewatering method according to any one of claims 1 to 4 , wherein continuous weighing and filling are performed during the filling step . 前記充填工程で、ポンプを用いて前記袋体内への充填を行うとともに、
前記袋体の膨張度合いを検出する検出手段として前記袋体の両側にスタンドを立て、その間の所定検出高さに検出糸を張り渡し、検出糸の一端を一方のスタンドに固定し、検出糸の他端を他方のスタンド上部に設けたリールに巻きつけて連結するとともに、リールの回転によりオン・オフされるスイッチを設け、
前記袋体が膨張して前記検出糸を引っ張り、リールが検出糸の巻き出しにより回転してスイッチがオンとなった時点で、前記袋体が所定の膨張度合いに達したことが検出された時点として自動的に前記ポンプを停止させる、請求項1〜のいずれか1項に記載の袋詰脱水処理方法。
In the filling step, filling the bag body using a pump,
As detection means for detecting the degree of expansion of the bag body, stands are placed on both sides of the bag body, the detection yarn is stretched over a predetermined detection height therebetween, one end of the detection yarn is fixed to one stand, and the detection yarn The other end is wound around and connected to a reel provided on the other stand, and a switch that is turned on and off by the rotation of the reel is provided.
When it is detected that the bag body has reached a predetermined degree of expansion when the bag body expands and pulls the detection yarn, the reel rotates by unwinding the detection yarn and the switch is turned on. automatically stops the pump as, sacked dehydration method according to any one of claims 1-5.
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