JPH0548331B2 - - Google Patents
Info
- Publication number
- JPH0548331B2 JPH0548331B2 JP3605086A JP3605086A JPH0548331B2 JP H0548331 B2 JPH0548331 B2 JP H0548331B2 JP 3605086 A JP3605086 A JP 3605086A JP 3605086 A JP3605086 A JP 3605086A JP H0548331 B2 JPH0548331 B2 JP H0548331B2
- Authority
- JP
- Japan
- Prior art keywords
- viscosity
- muddy water
- line
- mixer
- water
- 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.)
- Expired - Lifetime
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 66
- 239000003795 chemical substances by application Substances 0.000 claims description 24
- 239000007788 liquid Substances 0.000 claims description 16
- 239000011345 viscous material Substances 0.000 claims description 9
- 238000005553 drilling Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 238000009412 basement excavation Methods 0.000 description 12
- 238000011084 recovery Methods 0.000 description 8
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 239000002002 slurry Substances 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 239000010802 sludge Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
- 239000000440 bentonite Substances 0.000 description 2
- 229910000278 bentonite Inorganic materials 0.000 description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 229920002907 Guar gum Polymers 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 229920000161 Locust bean gum Polymers 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000002535 acidifier Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000003113 alkalizing effect Effects 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000665 guar gum Substances 0.000 description 1
- 235000010417 guar gum Nutrition 0.000 description 1
- 229960002154 guar gum Drugs 0.000 description 1
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 1
- 239000000711 locust bean gum Substances 0.000 description 1
- 235000010420 locust bean gum Nutrition 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Bulkheads Adapted To Foundation Construction (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Description
【発明の詳細な説明】
≪産業上の利用分野≫
この発明は泥水掘削工法における高粘度泥水の
供給システムに関する。DETAILED DESCRIPTION OF THE INVENTION <<Industrial Application Field>> This invention relates to a system for supplying high viscosity mud water in a mud water excavation method.
≪発明の背景およびその問題点≫
周知のように、都市土木分野などの建設工事で
は、地中壁、タンクの周壁、基礎工などを泥水掘
削工法によつて構築している。<<Background of the invention and its problems>> As is well known, in construction work in the field of urban civil engineering, underground walls, surrounding walls of tanks, foundations, etc. are constructed by the muddy water excavation method.
この工法は、主にベントナイトなどの粘土を水
に懸濁させ、分散剤、増粘剤などを添加して泥水
を作り、地盤を溝状あるいは円形断面状に掘削し
ながらこれを充満し、所定の深度まで掘削した後
内部の泥水とコンクリートを置換し、コンクリー
トを硬化させることで地中に壁や杭を構築するも
のである。 This construction method mainly consists of suspending clay such as bentonite in water, adding dispersants and thickeners, etc. to create muddy water, and filling the mud with it while excavating the ground in a trench or circular cross-section. After excavating to a depth of 1,000 yen, the muddy water inside is replaced with concrete, and the concrete is allowed to harden to construct walls and piles underground.
この種の工法において、掘削地盤が例えば砂礫
地盤の如き透水性である場合には、泥水が周辺地
盤に過剰に浸透流出し、泥水を常時掘削孔内に充
満させることが困難となる。 In this type of construction method, if the excavated ground is permeable, such as gravel ground, muddy water excessively seeps into the surrounding ground and flows out, making it difficult to constantly fill the excavation hole with muddy water.
そこで、本出願人は、先にベントナイトを主成
分とする泥水に代えて、水に溶解した粘性物質
と、硼砂、ホウ酸などの添加剤とからなる泥水を
開発した。 Therefore, the present applicant has previously developed a muddy water consisting of a viscous substance dissolved in water and additives such as borax and boric acid, in place of the muddy water whose main component is bentonite.
該泥水は水素イオン濃度（PH）の調整によつ
て、粘度が数万センチポアーズから10〜50センチ
ポアーズの極めて広い範囲で変化するものであ
る。 The viscosity of the muddy water varies over an extremely wide range from tens of thousands of centipoises to 10 to 50 centipoises by adjusting the hydrogen ion concentration (PH).
すなわち、PHの調節によつて、例えば砂礫層な
どの逸泥が大きな地盤を掘削するときには、泥水
を高粘度化した状態で掘削孔内に投入することに
より逸泥を防止し、また逸泥の少ない地盤の掘削
時には低粘度化することにより掘削能率の向上お
よび掘削土砂の分離促進を図ることができる。 In other words, by adjusting the PH, when excavating ground with a large amount of sludge, such as a sand and gravel layer, mud is injected into the drilling hole in a highly viscous state to prevent sludge and reduce sludge. When excavating a small amount of ground, lowering the viscosity can improve excavation efficiency and promote separation of excavated soil.
従来の作泥法は、液槽内の泥水を近くに設置し
た別途ミキサーに送り、そこで高粘度化剤と混合
させるものである。しかし、このように高粘度化
した泥水を通常の泥水のようにポンプで長距離輪
送することが難しかつた。このため、作泥プラン
トを掘削孔に近接して設けなればならないという
制約があつた。 In the conventional mud production method, the mud in the tank is sent to a separate mixer installed nearby, where it is mixed with a viscosity-enhancing agent. However, it has been difficult to transport such highly viscous muddy water over long distances using pumps like normal muddy water. For this reason, there was a constraint that the mud production plant had to be installed close to the excavation hole.
また、この種の泥水においては、泥水とこれに
混合される高粘度化剤の比率によつて大きく粘度
が変化し、現場施工時においてはその粘度管理を
精度よく行なうことが必要となる。 In addition, the viscosity of this type of muddy water varies greatly depending on the ratio of the muddy water and the viscosity increasing agent mixed therein, and it is necessary to accurately manage the viscosity during on-site construction.
この発明は、この種の高粘度泥水を用いた泥水
掘削工法に好適な泥水供給システムを得ることを
目的とする。 The object of the present invention is to obtain a mud water supply system suitable for this type of mud water excavation method using high viscosity mud water.
≪問題点を解決するための手段≫
前記目的を達成するため、この発明は、粘性物
質を水に溶解した泥水中に高粘度化剤を混合して
高粘度化させ、この状態で掘削孔内に投入するよ
うにした泥水掘削工法において、高粘度化処理を
掘削孔の近くで自動的に行なうものである。≪Means for Solving the Problems≫ In order to achieve the above object, the present invention mixes a viscosity increasing agent into muddy water in which a viscous substance is dissolved in water to increase the viscosity, and in this state is poured into a borehole. In a mud drilling method in which mud is injected into the ground, the process to increase viscosity is automatically carried out near the borehole.
すなわち、本発明の泥水供給システムは、前記
粘性物質と水とを混合するミキサーと、該ミキサ
ーから取出される泥水を貯蔵する液槽と、該液槽
から吐出される泥水供給ラインに接続された高粘
度化剤の供給ラインと、合流した泥水と高粘度化
剤の混合ライン上に設けられたラインミキサーと
からなり、該ラインミキサーで混合し、増粘させ
た高粘度泥水を前記掘削孔内に吐出するようにし
たことを特徴とする。 That is, the muddy water supply system of the present invention is connected to a mixer for mixing the viscous substance and water, a liquid tank for storing the muddy water taken out from the mixer, and a muddy water supply line discharged from the liquid tank. It consists of a supply line for the viscosity increasing agent and a line mixer installed on the mixing line for the combined muddy water and the viscosity increasing agent, and the line mixer mixes and thickens the high viscosity muddy water into the drilling hole. It is characterized in that it is designed to be discharged.
≪実施例≫
以下、この発明の一実施例を図面を用いて詳細
に説明する。<<Example>> Hereinafter, an example of the present invention will be described in detail with reference to the drawings.
図はこの発明に係る高粘度泥水の供給・回収シ
ステムを示す説明図である。図において１は掘削
孔、２は該掘削孔に近接して設置された泥水供給
システム、３は同じく掘削孔１に隣接して設けら
れた回収システムである。 The figure is an explanatory diagram showing a high viscosity muddy water supply/recovery system according to the present invention. In the figure, 1 is an excavation hole, 2 is a mud water supply system installed adjacent to the excavation hole, and 3 is a recovery system also installed adjacent to the excavation hole 1.
前記供給システム２は、粘性物質、水および防
腐剤を混合するミキサー４と、ミキサー４によつ
て混合攪拌された泥水を貯蔵する液槽６と、液槽
６の泥水の取出端側に接続された泥水供給ライン
８と、攪拌槽１０に貯蔵された高粘度化剤を前記
泥水供給ライン８に接続した高粘度化剤の供給ラ
イン１２と、合流した泥水と高粘度化剤の混合ラ
イン１４上に直列に接続された一対のラインミキ
サー１６とから概略構成され、このラインミキサ
ー１６の吐出端を前記掘削孔１に対向させてい
る。 The supply system 2 is connected to a mixer 4 that mixes a viscous substance, water, and a preservative, a liquid tank 6 that stores muddy water mixed and stirred by the mixer 4, and an outlet side of the muddy water of the liquid tank 6. the muddy water supply line 8, the viscosity-increasing agent supply line 12 which connects the viscosity-increasing agent stored in the stirring tank 10 to the muddy water supply line 8, and the combined muddy water and viscosity-increasing agent mixing line 14. The discharge end of the line mixer 16 is opposed to the excavated hole 1.
前記回収システム３は掘削孔１内に排出された
水中ポンプ２０からの回収ライン２４に、低粘度
化剤の貯留槽２４に溜められた低粘度化剤を供給
するための供給ライン２６を合流させ、この混合
ライン上に前記と同様にラインミキサー１６を設
け、このラインミキサー１６の吐出端を回収槽２
８に接続したものである。 The recovery system 3 connects a recovery line 24 from a submersible pump 20 discharged into the borehole 1 with a supply line 26 for supplying the viscosity reducing agent stored in the viscosity reducing agent storage tank 24. , a line mixer 16 is provided on this mixing line in the same manner as described above, and the discharge end of this line mixer 16 is connected to the collection tank 2.
8.
前記供給システム２は掘削孔１の掘削時におい
て作動し、高粘度泥水が掘削孔１に充満された状
態でその作動を停止する。また、回収システム３
は泥水とコンクリートとの置換時において作動
し、掘削孔１内の泥水がコンクリートに置き換つ
た時点でその作動を停止する。 The supply system 2 operates when the borehole 1 is excavated, and stops operating when the borehole 1 is filled with high viscosity mud. In addition, collection system 3
is activated when the muddy water is replaced with concrete, and stops its operation when the muddy water in the excavation hole 1 is replaced with concrete.
また、前記回収槽２８内に回収された泥水は、
混合した砂礫その他を沈降分離した状態でポンプ
３０を経て、前記泥水供給システムライン８に送
られる。 Moreover, the muddy water collected in the collection tank 28 is
The mixed sand and gravel are sent to the slurry supply system line 8 via the pump 30 in a sedimented and separated state.
従つて、前記供給・回収システム２，３が稼動
した後は、ミキサー４は掘削孔１内の泥水、また
は廃液分離による喪失分を補充するのみの量を混
合し、ポンプ３２を通じて液槽６内に補充すれば
良いことになる。 Therefore, after the supply/recovery systems 2 and 3 are in operation, the mixer 4 mixes the mud in the borehole 1 in an amount sufficient to replenish the amount lost due to waste liquid separation, and pumps it into the liquid tank 6 through the pump 32. It would be a good idea to replenish it.
ここで、前記粘性物としては、グアガムまたは
ローカストビンガムなどの植物性粘物質を単独あ
るいは併用したものであつて、いずれも水に溶解
すると粘稠な液体となるものである。この泥水は
高粘度化剤、すなわちアルカリ化剤によつてさら
に高粘度化し、粘度が数万センチポアーズまで高
められるが、このアルカリ化剤としては硼砂、ホ
ウ酸、水酸化ナトリウム、消石灰、炭酸ナトリウ
ムなどが用いられる。さらに、低粘度化剤は酸性
化剤であり、例えば硫酸アルミニウム、塩化アル
ミニウム、希硫酸、希塩酸などが用いられる。従
つて、液槽６内および回収槽２８に貯蔵されてい
る泥水は中性または弱酸性側となり、低粘度化状
態で貯蔵される。そして、この低粘度化している
泥水は液槽６内の水中ポンプ３４あるいは回収槽
２８内の水中ポンプ３０によつて前記泥水供給ラ
インに送られるが、この泥水供給ライン８には開
閉用のバルブ３６および圧力計３８が設けられ、
また、その先端には前記高粘度化剤の供給ライン
１２に並列して設けられた複数の比率注入弁４０
の開度が設定するためのバルブ比率設定器４２が
設けられ、吐出圧力に応じて各比率注入弁４０の
開度を設定するようになつている。 Here, the viscous substance may be a vegetable viscous substance such as guar gum or locust bean gum, alone or in combination, which becomes a viscous liquid when dissolved in water. This muddy water is made even more viscous by a viscosity-enhancing agent, that is, an alkalizing agent, increasing the viscosity to tens of thousands of centipoise. is used. Furthermore, the viscosity reducing agent is an acidifying agent, such as aluminum sulfate, aluminum chloride, dilute sulfuric acid, dilute hydrochloric acid, and the like. Therefore, the muddy water stored in the liquid tank 6 and the recovery tank 28 is neutral or weakly acidic, and is stored in a low viscosity state. This muddy water having a lower viscosity is sent to the muddy water supply line by a submersible pump 34 in the liquid tank 6 or a submersible pump 30 in the recovery tank 28, but this muddy water supply line 8 is equipped with an opening/closing valve. 36 and a pressure gauge 38 are provided,
Further, at its tip, a plurality of ratio injection valves 40 are provided in parallel with the supply line 12 of the viscosity increasing agent.
A valve ratio setting device 42 for setting the opening degree of each ratio injection valve 40 is provided, and the opening degree of each ratio injection valve 40 is set according to the discharge pressure.
また、前記高粘度化剤の供給ライン１２には攪
拌槽１０からの吐出端から順に開閉用バルブ４
４、注入ポンプ４６および流量計４８が設けら
れ、流量計を経て前記各比率注入弁４２に振分け
られる。 Further, in the supply line 12 of the viscosity increasing agent, opening/closing valves 4 are provided in order from the discharge end from the stirring tank 10.
4. An injection pump 46 and a flow meter 48 are provided, and the flow is distributed to each ratio injection valve 42 through the flow meter.
比率注入弁４０から吐出する高粘度化剤は、そ
れぞれのチヤツク弁５０を経て合流した状態で前
記泥水供給ライン８に合流する。 The viscosity-increasing agent discharged from the ratio injection valve 40 passes through each chuck valve 50 and flows into the muddy water supply line 8.
前記ラインミキサー１６は筒形ハウジング内に
複数のステータ翼を交互に配置したもので、圧送
された泥水および高粘度化剤はこの内部を螺旋状
に回りつつ混合し、泥水は高粘度化剤によりアル
カリ化し、高粘度化する。 The line mixer 16 has a plurality of stator blades arranged alternately in a cylindrical housing, and the pumped muddy water and the viscosity increasing agent are mixed while circulating in a spiral shape inside the line mixer 16, and the muddy water is mixed by the viscosity increasing agent. It becomes alkalized and becomes highly viscous.
ラインミキサー１６の吐出端において、混合ラ
イン上に電磁バルブ５２および粘度自動測定器５
４が直列接続されている。粘度自動測定器５４は
圧送されてくる高粘度泥水の粘度を自動測定し、
比較器５６の一方側の入力端にその検出値を出力
する。 At the discharge end of the line mixer 16, a solenoid valve 52 and an automatic viscosity measuring device 5 are placed on the mixing line.
4 are connected in series. The automatic viscosity measuring device 54 automatically measures the viscosity of the high viscosity muddy water that is pumped,
The detected value is output to one input terminal of the comparator 56.
また比較器５６の他方側の入力端には前記掘削
孔１の地盤に適応した粘度を設定した設定器５８
が接続されている。比較器５６は検出値と設定値
を比較し、その大小により電磁バルブ５２の開閉
制御を行なう。またこれを同時に比較器５６の出
力側には前記高粘度化剤の供給ライン１２に接続
された電磁バルブ６０の開閉制御を行ない、設定
値より高粘度化した状態で電磁バルブ６０を閉
じ、高粘度化剤の泥水に対する供給量を制限す
る。従つて、供給システム２からは常に掘削孔１
の地盤に応じた粘度の高粘度泥水が供給されるこ
とになる。 Further, at the input end on the other side of the comparator 56, a setting device 58 is provided which sets a viscosity suitable for the ground of the excavation hole 1.
is connected. The comparator 56 compares the detected value and the set value, and controls the opening and closing of the electromagnetic valve 52 based on the magnitude thereof. At the same time, the output side of the comparator 56 controls the opening and closing of a solenoid valve 60 connected to the supply line 12 of the high viscosity agent, and closes the solenoid valve 60 when the viscosity is higher than the set value. Limit the amount of viscosity agent supplied to the slurry. Therefore, supply system 2 always supplies borehole 1.
High viscosity mud water with a viscosity appropriate to the ground will be supplied.
ただし、該供給システムにおいては、混合ライ
ン１４への粘度自動測定器５４の接続は必須条件
ではない。 However, in this supply system, connection of the automatic viscosity measuring device 54 to the mixing line 14 is not an essential condition.
さらに、掘削孔１には液面測定装置６２が備え
られ、この出力により前記液槽６のポンプ３４お
よび高粘度化剤の供給ライン１２に設けたポンプ
４６を駆動する。すなわち、泥水の液面が所定の
状態になつた場合には、液面測定装置６２の検知
出力を受けてポンプ３４，４６は停止し、泥水お
よび高粘度化剤の供給が自動停止する。 Furthermore, the excavated hole 1 is equipped with a liquid level measuring device 62, and its output drives the pump 34 of the liquid tank 6 and the pump 46 provided in the supply line 12 of the viscosity increasing agent. That is, when the liquid level of the muddy water reaches a predetermined state, the pumps 34 and 46 are stopped in response to the detection output of the liquid level measuring device 62, and the supply of the muddy water and the viscosity increasing agent is automatically stopped.
≪発明の効果≫
以上実施例により詳細に説明したように、この
発明によれば、粘性物質を高粘度化剤を用いて高
粘度泥水化し、掘削孔内に投入する工法におい
て、粘度管理をその地盤の状態に応じて精度よく
行なうことができ、また、掘削孔内への投入直前
に混合し、増粘させて供給するために高粘度泥水
の搬送ラインが短くてよく、作業性を向上させる
ことができる。<<Effects of the Invention>> As explained in detail in the examples above, according to the present invention, viscosity control is achieved in a construction method in which a viscous substance is turned into high-viscosity slurry using a viscosity-increasing agent and the slurry is injected into an excavation hole. It can be carried out with high precision depending on the ground condition, and since it is mixed and thickened just before it is introduced into the borehole, the conveyance line for high-viscosity muddy water can be short, which improves work efficiency. be able to.
図はこの発明に係る高粘度泥水の供給・回収シ
ステムを示す説明図である。
１……掘削孔、２……泥水供給システム、４…
…ミキサー、６……液槽、８……泥水供給ライ
ン、１２……高粘度化剤の供給ライン、１４……
混合ライン、１６……ラインミキサー。
The figure is an explanatory diagram showing a high viscosity muddy water supply/recovery system according to the present invention. 1...Drilling hole, 2...Mud water supply system, 4...
... Mixer, 6 ... Liquid tank, 8 ... Mud water supply line, 12 ... Viscosity increasing agent supply line, 14 ...
Mixing line, 16... line mixer.
Claims (1)
を混合して高粘度化させ、この状態で掘削孔内に
投入するようにした泥水掘削工法において、前記
粘性物質と水とを混合するミキサーと、該ミキサ
ーから取出される泥水を貯蔵する液槽と、該液槽
から吐出される泥水供給ラインに接続された高粘
度化剤の供給ラインと、合流した泥水と高粘度化
剤の混合ライン上に設けられたラインミキサーと
からなり、該ラインミキサーで混合し、増粘させ
た高粘度泥水を前記掘削孔内に吐出するようにし
たことを特徴とする泥水掘削工法における高粘度
泥水の供給システム。1. In a muddy water drilling method in which a viscous substance is dissolved in water, a viscosity-increasing agent is mixed in the muddy water to increase the viscosity, and the viscous substance and water are mixed together in a muddy water drilling method in which the viscosity is increased and the viscosity is injected into the borehole in this state. A mixer, a liquid tank for storing muddy water taken out from the mixer, a viscosity increasing agent supply line connected to a muddy water supply line discharged from the liquid tank, and mixing of the combined muddy water and the viscosity increasing agent. A high viscosity muddy water in a muddy water drilling method characterized by comprising a line mixer installed on a line, and the high viscosity muddy water mixed by the line mixer and thickened is discharged into the drilling hole. supply system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3605086A JPS62194317A (en) | 1986-02-20 | 1986-02-20 | Highly viscous mud water supply system for mud-water excavation work |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3605086A JPS62194317A (en) | 1986-02-20 | 1986-02-20 | Highly viscous mud water supply system for mud-water excavation work |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62194317A JPS62194317A (en) | 1987-08-26 |
| JPH0548331B2 true JPH0548331B2 (en) | 1993-07-21 |
Family
ID=12458885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3605086A Granted JPS62194317A (en) | 1986-02-20 | 1986-02-20 | Highly viscous mud water supply system for mud-water excavation work |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62194317A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5356478B2 (en) * | 2011-09-12 | 2013-12-04 | 東日本旅客鉄道株式会社 | In-hole water level stabilization system for cast-in-place piles |
-
1986
- 1986-02-20 JP JP3605086A patent/JPS62194317A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62194317A (en) | 1987-08-26 |
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