JPS59220511A - Prevention of swelling of dredged and reclaimed sludge - Google Patents
Prevention of swelling of dredged and reclaimed sludgeInfo
- Publication number
- JPS59220511A JPS59220511A JP9406283A JP9406283A JPS59220511A JP S59220511 A JPS59220511 A JP S59220511A JP 9406283 A JP9406283 A JP 9406283A JP 9406283 A JP9406283 A JP 9406283A JP S59220511 A JPS59220511 A JP S59220511A
- Authority
- JP
- Japan
- Prior art keywords
- water
- landfill
- mud
- swelling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000008961 swelling Effects 0.000 title claims abstract description 11
- 239000010802 sludge Substances 0.000 title abstract description 8
- 230000002265 prevention Effects 0.000 title description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 238000000034 method Methods 0.000 claims abstract description 16
- 239000002245 particle Substances 0.000 claims abstract description 9
- 239000002689 soil Substances 0.000 claims abstract 6
- 238000001179 sorption measurement Methods 0.000 claims description 14
- 239000007787 solid Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 5
- 230000003204 osmotic effect Effects 0.000 claims description 3
- 235000010627 Phaseolus vulgaris Nutrition 0.000 claims description 2
- 244000046052 Phaseolus vulgaris Species 0.000 claims description 2
- 238000005086 pumping Methods 0.000 claims 1
- 239000000701 coagulant Substances 0.000 abstract description 6
- 239000011440 grout Substances 0.000 abstract 1
- 238000007596 consolidation process Methods 0.000 description 9
- 238000010276 construction Methods 0.000 description 5
- 239000004927 clay Substances 0.000 description 4
- 239000013049 sediment Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000008021 deposition Effects 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000002203 pretreatment Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005325 percolation Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/18—Making embankments, e.g. dikes, dams
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、シルト・粘土成分の多い浚渫泥をポンプ船に
よって埋立る場合に、埋立直後の泥の体積が浚渫前の体
積よりも膨潤する現象を防止する浚渫埋宜泥の膨潤防止
方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention provides a dredging and reclamation system that prevents the phenomenon in which the volume of mud immediately after reclamation swells more than the volume before dredging, when dredged mud containing a large amount of silt and clay is reclaimed by a pump ship. This invention relates to a method for preventing swelling of mud.
シルト・粘土分の多い浚渫泥の埋立において、従来工法
による急速施工の場合、埋立終了直後の泥の体積が浚渫
前の体積の２倍を超えた実例は多く、このため計画浚渫
土量の半分も埋立地に収容できなかったケースや、埋立
地護岸の嵩上げ、護岸背後の再築堤を行って収容した例
も少なくない。When reclamation of dredged mud with a high content of silt and clay is carried out rapidly using conventional construction methods, there are many cases in which the volume of mud immediately after reclamation is more than twice the volume before dredging, resulting in half of the planned dredged volume. There are also many cases where the waste could not be contained in the landfill, or where the waste was contained by raising the level of the reclaimed land seawall or rebuilding the embankment behind the seawall.
また、埋立工期が３〜１０年という晟速施工の場合にあ
っても、はシＬ６＠以下の体積変化量を示している。こ
のようにシルト・粘土分の多い浚渫泥によって造成され
た埋立地盤は、埋立終了後に地盤改良工事を実厖してお
り、本発明は埋立１工事過程において、上記第の体積変
化を抑制し、埋立地護岸の嵩上げや再築堤の不要な施工
ができるようにするとともに埋立工事終了後に行う地盤
改良工事についても初期の工程省略ができる膨潤防止方
法である。Moreover, even in the case of rapid construction where the reclamation period is 3 to 10 years, the volume change is less than L6@. In this way, the reclaimed ground created by dredged mud with a high content of silt and clay undergoes ground improvement work after the completion of the reclamation, and the present invention suppresses the above-mentioned volume change in the first reclamation work process, This is a swelling prevention method that eliminates the need for raising the level of the reclaimed land embankment or rebuilding the embankment, as well as omitting the initial stages of ground improvement work to be carried out after the completion of the reclamation work.
以下図面について発明の詳細な説明する。The invention will be described in detail below with reference to the drawings.
第１図は、本発明の浚渫埋立泥の膨潤防止方法を説明す
る埋立地の平面形状を示し、埋立護岸１により囲まれた
埋立地へポンプ船からのｆｆｌ！泥水を流入させるに当
り、排泥管２の任意の位置において薬注装置３により凝
集剤を注入する。凝集剤は、泥水中の微粒土丹が凝集結
合し、埋立地内に沈澱堆積する堆積側の透水性を増大さ
せるためのものである。埋立地内には、埋立工事開始前
に排水ポケット４を設け、排水ポケットに向って透水マ
ット管５、粗粒濾過体６を敷設する。透水マット管と粗
粒濾過体は、堆積側からの浸透水を排水ポケット内に導
くものである。排水ポケットは、浸透余水量の残余水量
を迂回させる導流築堤７と通過させる吸着濾過体８によ
り囲み、排水ポケットに流入する浸透水、残余水を排水
ポンプ９により汲み上げ排水する。余水吐１０は、排水
ポンプを使用しなくなる埋立工事の終期以後における余
水排水を行う。FIG. 1 shows the planar shape of a reclaimed land for explaining the method of preventing swelling of dredged reclaimed mud of the present invention. When muddy water is introduced, a flocculant is injected at an arbitrary position of the mud drain pipe 2 using a chemical injection device 3. The flocculant is used to coagulate and bond the fine clay particles in muddy water and increase the water permeability of the sediment side where the sediment is deposited in the landfill. A drainage pocket 4 is provided in the landfill before the start of the construction work, and a water-permeable mat pipe 5 and a coarse filter 6 are laid toward the drainage pocket. The permeable mat pipe and coarse filter body guide permeated water from the pile side into the drainage pocket. The drainage pocket is surrounded by a diversion embankment 7 that detours the residual amount of permeated water and an adsorption filter 8 that allows it to pass through, and the permeated water and residual water flowing into the drainage pocket are pumped up by a drainage pump 9 and drained. The spillway 10 drains excess water after the end of the landfill work when the drainage pump is no longer used.
第２図は、本発明の方法による埋立地の任意断面を示し
たもので、埋立地の元の地盤１１上に排泥管２から流入
した沈澱雄積層１２があり、余水は、埋立地の元の地盤
上に配置した透水マット管５に向って浸透する。透水マ
ット管の一方の端部は粗粒濾過体に連接し、浸透水は排
水ポケット４に集まるようになっている。粗粒濾過体６
は、粗殺瀘“材を網袋等に入れて積上げ溝成する。FIG. 2 shows an arbitrary cross section of a reclaimed land according to the method of the present invention, where there is a sedimentary layer 12 that has flowed in from the drainage pipe 2 on the original ground 11 of the reclaimed land, and the surplus water is The water permeates toward the water-permeable mat pipe 5 placed on the original ground. One end of the water-permeable mat tube is connected to a coarse filter so that the permeated water collects in a drainage pocket 4. Coarse filter body 6
For this purpose, roughly killed lumber is placed in net bags, etc. and piled up to form a groove.
１！３図は、本発明の透水マット管の敷設状況を示す断
面図であり、作業台船１３上に透水マット８１４を積載
し、順次敷設していく過程で粗粒濾材１５を運搬機１６
により封入架台１７に送り透水マット上に落下させ、接
合機１８により透水マット内に粗粒濾材を封じ込め閉じ
る。1 and 3 are cross-sectional views showing how the water-permeable mat pipe of the present invention is laid. In the process of loading the water-permeable mat 814 on the work barge 13 and sequentially laying it, the coarse filter medium 15 is transferred to the transporter 16.
The coarse filter medium is sent to the enclosure frame 17 and dropped onto a water-permeable mat, and the coarse filter material is sealed and closed within the water-permeable mat by the bonding machine 18.
第４図は、上記透水マット、に粗粒濾材を封入して成る
透水マット管の断面図である。透水マットは浸透水を通
過させるに適した空隙のある透水シート類でもよい、浸
透水は凝集剤が注入されているので微細粒子が凝集して
出来た造粒堆積側の間隙を通過し、堆積側による吸着作
用もありで、浮遊物質量の少ない清澄水であり、埋立過
程中に透水マットが目詰りすることはない。FIG. 4 is a sectional view of a water-permeable mat tube formed by enclosing a coarse filter medium in the water-permeable mat. The water-permeable mat may be a water-permeable sheet with voids suitable for the permeation water to pass through.Since the permeation water is injected with a coagulant, it passes through the gaps on the granulation pile side created by the agglomeration of fine particles, and is deposited. Due to the adsorption effect by the side, the water is clear and has a small amount of suspended solids, so the water-permeable mat will not become clogged during the landfill process.
ｊｇ５図は、本発明において埋立泥が自重圧密と浸透水
圧力による圧密作用を受けることを説明する模式図であ
り、（Ａ）は従来の埋立地内における堆積ＷＡ１２が、
水中重量で表わされる圧力を受ける状態を（Ｂ）は、水
中重量で表わした自重による圧力の他に、埋立地内と排
水ポケット内の水位差Ｈにより、堆積派内に発生する浸
透水圧力１６を受＆プ、その圧力により圧密速度を増す
状態を示すもので、との圧密速度と関係する埋立泥の透
水係数ｋ （Ｋ９／ｗｉｎ）は、圧密荷重Ｐ（Ｋ９／、
Ｉ）に対し第１表に示す試験例がある。Figure jg5 is a schematic diagram illustrating that in the present invention, the reclaimed mud is subjected to the consolidation action by its own weight consolidation and the pressure of seepage water, and (A) is a diagram illustrating that the accumulated WA12 in the conventional landfill is
(B) shows the state of being subjected to pressure expressed by weight in water.In addition to the pressure due to its own weight expressed in weight in water, it is also affected by seepage water pressure 16 generated in the sedimentary basin due to the water level difference H between the reclaimed land and the drainage pocket. The hydraulic conductivity k (K9/win) of the reclaimed mud, which is related to the consolidation rate, is calculated by the consolidation load P (K9/,
For I), there are test examples shown in Table 1.
第１表
第１表より、凝集剤を添加した堆積側は、圧密荷重Ｐの
小さい範囲において、無添加の場合よりも透水係数が大
きい。こ、のことは、埋立過程の凝集剤を添加した軟弱
な状態の堆積側は、ある圧密レベルまで浸透水圧を利用
して急速圧密させることが可能であることを意味し、施
工計画に際しては、凝集剤の種類、薬品の添加量および
堆積側の浸透圧密特性等を充分把握しておく必要がある
。Table 1 From Table 1, it can be seen that the deposition side to which the coagulant was added has a higher hydraulic permeability coefficient than the case without the addition in the range of small consolidation load P. This means that it is possible to rapidly consolidate the soft deposited area with the addition of coagulant during the landfill process using seepage water pressure up to a certain consolidation level, so when planning construction, It is necessary to fully understand the type of flocculant, the amount of chemicals added, and the osmotic consolidation characteristics of the deposition side.
第６図は、堆積側と分離して生成する余水のうち、浸透
水とならなかりた残余水の浮遊物質量を低減させて、排
水ポケットに導くための吸着濾過体の断面図である。基
礎盛土１９の上部に透水マットまたは透水シートを通水
面とする前処理濾過板２０を配し、その下流側に網装入
り粗粒濾材を積上げた吸着濾過体２１を設けてａ成する
２段濾過装置である。この吸着濾過体に流入する余水は
排泥管において凝集剤を添加しているために浮遊管質と
しては主に凝集粒子で若千の微細粒子を含有する程度で
ある。従って、浮遊物質は、はり前処理濾過板の透水マ
ット表面に付着し、吸着濾過体本体には低濃度余水が流
入する。吸着濾過体内で更に浮遊物質量が吸着低減され
、排水の浮遊物質量（Ｓ Ｓ） ”２０〜５０ ｐｐｍ
トナリ、一般ノ排水基準値を満足させることができる。Figure 6 is a cross-sectional view of an adsorption filter for reducing the amount of suspended solids in the remaining water that does not become percolation water, which is generated by separation from the sediment side, and guiding it to the drainage pocket. . A pre-treatment filter plate 20 with a water-permeable mat or a water-permeable sheet as a water-permeable surface is arranged on the upper part of the foundation embankment 19, and an adsorption filter body 21 in which mesh-filled coarse-grain filter media is piled up is provided on the downstream side. It is a filtration device. Since a coagulant is added to the surplus water flowing into the adsorption filter in the sludge drainage pipe, the floating pipe material mainly contains coagulated particles and a few thousand fine particles. Therefore, suspended solids adhere to the water-permeable mat surface of the beam pre-treated filter plate, and low concentration surplus water flows into the adsorption filter body. The amount of suspended solids is further adsorbed and reduced in the adsorption filter, reducing the amount of suspended solids (SS) in wastewater to 20 to 50 ppm.
It is possible to satisfy general wastewater standard values.
埋立工事の終期において、吸着濾過体内粒子する余水の
浮遊物質量が過大になったときには、吸着濾過体の上流
側に水流抑制装置を設置して、物理的対策により浮ａ物
１ｆｊｌを低減させる。なお、前処理−過板の透水マッ
ト表面に付着した浮遊物質は、適時下′方へ掃き落し除
去する。At the end of the landfill work, if the amount of suspended solids in the leftover water becoming particles in the adsorption filter becomes excessive, a water flow control device will be installed upstream of the adsorption filter and physical measures will be taken to reduce the amount of suspended solids 1fjl. . In addition, floating substances adhering to the water-permeable mat surface of the pre-treatment filter plate are removed by sweeping them downwards as appropriate.
第１図は、本発明の浚渫埋立側の膨潤防止方法を説明す
る埋立地の平面形状を示し、図中１は埋豆護岸、２は排
泥管、３は薬品注入装置、４は排水ポケット、６は透水
マット管、６は粗粒濾過体、７は導Ｗｌ築堤、８は吸着
濾過体、９は排水ポンプ、１０は余水吐である。
第２図は、本発明の方法による埋立地の施工断面を示し
、・図中１は埋置護岸、２は排泥管、４は排水ポケット
、５は透水マット管、６は粗粒濾過体、７は導ｖｉ６築
堤、９は排水ポンプ、１０は余水吐、１１は埋立地在来
地盤、１２は沈澱堆積層である。
品３図は、本発明の透水マット管の敷設状況を示す断面
図で、図中５は透水マット管、６は粗粒濾過体、１１は
埋立地在来地盤、１３は作業台船、１４は透水マット材
、１６は１１粒濾材、１６は運搬ぬ、１７は封入台、１
８は接合機である。
第４図は、透水マット管の断面図を示し、図中１４は透
水マット材、１５は粗Ｍ、瀘材を示す。
第６図は、埋立側が自重圧密と浸透水圧にょる圧密をう
けることを示す模式図で、図中１２は沈＊４渭泥、１６
は浸透水正方の方向である。
第６ＩＸｉは、残余水を処理する吸着濾過体の断面図で
、図中１９は基礎盛土、２０は前処理濾過板、２１は吸
着濾過体、２２は保持杭、２３は柵板である。
手 続 補 正 書
昭和１９年 ７月ノ１日
特許庁長官 若 杉 和 夫 殿
Ｌ 事件の表示
昭和５８年特許願第９４０６２号
２、発明の名称
浚渫埋立泥め膨潤防止方法
３、補正をする者
事件との関係 特許出願人
住所（居所） 東京都渋谷区渋谷２−１０−１６昭和５
８年８月３０日（発送日）
６、補正の対象
明細書
６、補正の内容
別紙の通り（内容に変更なし）Figure 1 shows the planar shape of a reclaimed land to explain the swelling prevention method on the dredged and reclaimed side of the present invention, in which 1 is a buried bean embankment, 2 is a sludge pipe, 3 is a chemical injection device, and 4 is a drainage pocket. , 6 is a permeable mat pipe, 6 is a coarse filter, 7 is a guide Wl embankment, 8 is an adsorption filter, 9 is a drainage pump, and 10 is a spillway. Figure 2 shows a construction cross section of a reclaimed land according to the method of the present invention, where 1 is a buried revetment, 2 is a sludge pipe, 4 is a drainage pocket, 5 is a permeable mat pipe, and 6 is a coarse filter. , 7 is a drainage embankment, 9 is a drainage pump, 10 is a spillway, 11 is the reclaimed land's native ground, and 12 is a sedimentary sediment layer. Figure 3 is a cross-sectional view showing the installation status of the water-permeable mat pipe of the present invention, in which 5 is the water-permeable mat pipe, 6 is the coarse filter, 11 is the reclaimed land, 13 is the work barge, and 14 is the water-permeable mat pipe. 1 is a water-permeable mat material, 16 is an 11-grain filter medium, 16 is a conveyor, 17 is a inclusion stand, 1
8 is a joining machine. FIG. 4 shows a cross-sectional view of the water-permeable mat tube, and in the figure, 14 indicates a water-permeable mat material, and 15 indicates a coarse M filter material. Figure 6 is a schematic diagram showing that the landfill side is subjected to self-weight consolidation and consolidation due to osmotic water pressure.
is the direction of the permeated water square. No. 6 IXi is a cross-sectional view of an adsorption filter for treating residual water, in which 19 is a foundation embankment, 20 is a pretreatment filter plate, 21 is an adsorption filter, 22 is a holding stake, and 23 is a fence plate. Procedures Amendment Written on July 1, 1942 Kazuo Wakasugi, Director General of the Patent Office Case indication 1982 Patent Application No. 94062 2 Title of invention Method for preventing swelling of dredged and reclaimed sludge 3 Make amendments Relationship with the case Patent applicant address (residence) 2-10-16 Shibuya, Shibuya-ku, Tokyo Showa 5
August 30, 2008 (shipment date) 6. Specification subject to amendment 6. Contents of amendment as shown in attached sheet (no change in content)
Claims (3)
粗粒濾過体で構成する築堤により締切って排水ポケット
区画を形成させ、築堤の粗粒濾過体に向けて、粗粒濾材
を封入した透水マット管を埋立地内現地盤上に配置して
成る埋立地へ、浚渫泥の排送過程において凝集剤を添加
した泥水を投入することにより、埋立地内堆積土粒子の
透水係数を増大させ、埋立地内余水が堆積土粒子間を容
易に通過し、透水マット管と粗粒濾過体を経て排水ポケ
ットに導くようにし、排水ポケット内に設けた排水ポン
プを駆動して排水ポケット内の水位を低く保ち、埋立地
内水位と排水ポケット内の水位差による堆積土粒子に作
用する浸透圧力と堆積土粒子の自重とにより、堆積土粒
子層を急速沈下させることを特徴とする俊渫埋豆泥の膨
潤防止方法。(1) A section of the reclaimed land that includes the spillway is closed off by an embankment with a coarse filter at the bottom to form a drainage pocket section, and the coarse filter is directed toward the coarse filter of the embankment. By injecting muddy water with a flocculant added during the dredged mud discharge process into a landfill consisting of sealed permeable mat pipes placed on the ground within the landfill, the hydraulic conductivity of the sedimentary soil particles within the landfill is increased. , the surplus water in the landfill easily passes between the accumulated soil particles and is guided to the drainage pocket via the permeable mat pipe and the coarse filter, and the water level in the drainage pocket is lowered by driving the drainage pump installed in the drainage pocket. A fast-pumping buried bean mud that maintains the water level at a low level and quickly sinks the layer of deposited soil particles due to the osmotic pressure acting on the deposited soil particles due to the difference between the water level in the landfill and the water level in the drainage pocket, and the dead weight of the deposited soil particles. How to prevent swelling.
ート内に粗粒濾材を封入して成る透水マット管と網装入
り粗粒濾材を埋立地内現地盤上に配置することを特徴と
する浚渫埋立泥の膨潤防止方法。(2) In the specified invention, the dredging and filling method is characterized in that, before the dredging and filling work, a permeable mat pipe formed by enclosing a coarse filter material in a permeable sheet and a mesh-encased coarse filter material are placed on the ground within the landfill site. How to prevent mud from swelling.
の１辺を粗粒濾材を用いた吸着濾過体で構成し、浸透余
水量の残余水量が吸着濾過体を通過することにより、残
余水の浮遊物質量を低減させることを特徴とする浚渫埋
立泥の膨潤防止方法。(3) In the specified invention, one side of the upper part of the embankment of the drainage pocket is constructed with an adsorption filter using a coarse-grained filter material, and the residual amount of permeated water passes through the adsorption filter, thereby reducing suspended solids in the remaining water. A method for preventing swelling of dredged and landfill mud, which is characterized by reducing the amount of mud.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9406283A JPS59220511A (en) | 1983-05-30 | 1983-05-30 | Prevention of swelling of dredged and reclaimed sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9406283A JPS59220511A (en) | 1983-05-30 | 1983-05-30 | Prevention of swelling of dredged and reclaimed sludge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59220511A true JPS59220511A (en) | 1984-12-12 |
| JPS6354092B2 JPS6354092B2 (en) | 1988-10-26 |
Family
ID=14100035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9406283A Granted JPS59220511A (en) | 1983-05-30 | 1983-05-30 | Prevention of swelling of dredged and reclaimed sludge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59220511A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61290107A (en) * | 1985-06-17 | 1986-12-20 | Penta Ocean Constr Co Ltd | Sludge reclamation work |
| CN103397646A (en) * | 2013-08-19 | 2013-11-20 | 安徽省水利水电勘测设计院 | Technique for fast filling constructed wetland in shore area |
-
1983
- 1983-05-30 JP JP9406283A patent/JPS59220511A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61290107A (en) * | 1985-06-17 | 1986-12-20 | Penta Ocean Constr Co Ltd | Sludge reclamation work |
| CN103397646A (en) * | 2013-08-19 | 2013-11-20 | 安徽省水利水电勘测设计院 | Technique for fast filling constructed wetland in shore area |
| CN103397646B (en) * | 2013-08-19 | 2015-01-21 | 安徽省水利水电勘测设计院 | Technique for fast filling constructed wetland in shore area |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6354092B2 (en) | 1988-10-26 |
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