JP2529004B2 - Ground hardening material pressure injection method and its equipment - Google Patents
Ground hardening material pressure injection method and its equipmentInfo
- Publication number
- JP2529004B2 JP2529004B2 JP2151578A JP15157890A JP2529004B2 JP 2529004 B2 JP2529004 B2 JP 2529004B2 JP 2151578 A JP2151578 A JP 2151578A JP 15157890 A JP15157890 A JP 15157890A JP 2529004 B2 JP2529004 B2 JP 2529004B2
- Authority
- JP
- Japan
- Prior art keywords
- injection
- hardening material
- sludge
- ground
- nozzle
- 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
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は軟弱地盤の安定、構築物の基礎、地山の支保
等を目的として施工される地盤硬化材圧力注入工法に関
するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a ground hardening material pressure injecting method which is constructed for the purpose of stabilizing soft ground, foundation of a structure, support of ground, and the like.
（従来の技術） 従来、地盤硬化材の注入には高圧注入と低圧注入があ
り、高圧注入には更に置換充填と圧密充填とが考えられ
固結時間による緩結、瞬結注入形態による多段注入、複
合注入等多くの工法が開発されてきた。しかし、いずれ
の場合においても一気に硬化材が対象地盤に吸収、含浸
されるものではなく、多量の上昇スラッジが発生してい
る。この上昇スラッジに対する対応策としては注入ロッ
ド挿入口からの吸引収集が提案されている他は、注入ロ
ッド挿入口にパッカーを設けて地中に押し戻すか、地上
に溢出させて垂れ流すかの対応しかなされていない。(Prior art) Conventionally, there are high-pressure injection and low-pressure injection for injection of the ground hardening material, and high-pressure injection can be further considered as replacement filling and compaction filling. , Many methods such as compound injection have been developed. However, in any case, the hardening material is not absorbed and impregnated into the target ground all at once, and a large amount of rising sludge is generated. As a countermeasure against this rising sludge, suction collection from the injection rod insertion port has been proposed.Other than that, it is only possible to install a packer at the injection rod insertion port to push it back into the ground or to overflow it to the ground and run it down. Not done.
また、圧力注入の場合には硬化材の注入量と地盤の粒
子密度のバランスに特別の配慮はなされていなかった。Further, in the case of pressure injection, no special consideration was given to the balance between the injection amount of the hardening material and the particle density of the ground.
（発明が解決しようとする問題点） 上述の上昇スラッジ対応策は垂れ流しの場合は勿論、
パッカーを設けた場合でも完全にスラッジを地中に押し
戻すことはできず、様々な成分を含んだ泥水状のスラッ
ジの処理に極めて高額な費用がかかっている。勿論、ス
ラッジは産業廃棄物であり、放置すれば公害発生の原因
となり、形態としては粘度の高い流動体で極めて取扱い
難く、現物から処理施設への運搬にも多くの問題が存在
し、処理費の高額化に拍車をかけている。(Problems to be solved by the invention) Of course, the above-mentioned measures against rising sludge are not limited to the case of drainage.
Even if a packer is provided, the sludge cannot be completely pushed back into the ground, and the treatment of sludge in the form of muddy water containing various components is extremely expensive. Of course, sludge is an industrial waste, and if left untreated, it causes pollution, and it is extremely difficult to handle because it is a highly viscous fluid, and there are many problems in transportation from the actual product to the treatment facility. Is spurring higher prices.
一方、スラッジをパッカーにより押し戻したり垂れ流
し状態にしておくことにより、注入効果の面でも多くの
マイナス点を生じている。On the other hand, pushing the sludge back by the packer or leaving the sludge in a floating state causes many negative points in terms of the injection effect.
即ち、対象地盤中のスラッジは、そのまま地中の密度
を高め、硬化材の噴射圧を減殺する方向に働くと共に、
注入された硬化材を希釈してその純度を低くするうえ
に、その不純化が注入層の固結強度にも影響を与えるの
は勿論で、上昇スラッジの処理は注入効果にも多くの問
題点を残しているものである。これらに対して注入ロッ
ド挿入口からのスラッジの吸引収集は消極策として効果
を挙げているが、大掛かりな吸引装置が必要であり、特
に注入深度が深くなると注入ロッド挿入クリアランスに
目詰まりを生じたりして、地上までスラッジをリフトす
ることが出来ないという問題がある。また注入効果の促
進にも積極的には寄与し得ない恨みがある。That is, the sludge in the target ground increases the density in the ground as it is, and acts to reduce the injection pressure of the hardening material,
In addition to diluting the injected hardener to reduce its purity, its impureness not only affects the consolidation strength of the injection layer, but the treatment of rising sludge has many problems with the injection effect. Is what is left. On the other hand, suction collection of sludge from the injection rod insertion port is effective as a reversal measure, but a large-scale suction device is required, and especially when the injection depth becomes deep, the injection rod insertion clearance may become clogged. Then, there is a problem that the sludge cannot be lifted to the ground. Moreover, there is a resentment that cannot positively contribute to the promotion of the injection effect.
（問題点を解決するための手段） 本発明は厄介物として押し戻したり、垂れ流したりし
た上昇スラッジを、注入ロッド自体に設けた吸引スリッ
トによってコンパクトに吸引収集することによって注入
効果を高め、スラッジの処理も一挙に行なって作業性の
向上、注入効果の両面から問題点の解決をはかろうとす
るものである。更に注入ロッドの硬化材圧送経路に流量
計測機構を設けて地盤硬化材の噴射注入量をその場で測
定しながら注入調整を行うことが出来るようにしたもの
である。(Means for Solving the Problems) The present invention enhances the injection effect by compactly collecting the ascending sludge that has been pushed back or dripped up by the suction slit provided in the injection rod itself, thereby enhancing the injection effect. We will try to solve the problems from both aspects of workability improvement and injection effect. Further, a flow rate measuring mechanism is provided in the hardening material pressure feeding path of the injection rod so that the injection adjustment can be performed while measuring the injection injection amount of the ground hardening material on the spot.
（作用） 上昇スラッジが硬化材噴射ノズルから所定の間隔を置
いて設けられた吸引スリットによって吸引されると、ス
ラッジの上昇力に負荷された硬化材噴射圧や噴射エアー
の負担が減少し、空隙率も増すので、噴射された硬化材
噴流の到達距離が伸びる。また、噴射ノズルと吸引スリ
ットとの適切な間隔は注入ロッドの径と硬化材の種類、
噴射圧、吸引力によって異なるが、適切な間隔を調整で
きた場合には、噴射と吸引の相乗効果による極めて効果
的な注入を行うことができる。(Operation) When the rising sludge is sucked from the hardening material injection nozzle by a suction slit provided at a predetermined interval, the load of the hardening material injection pressure and the injection air applied to the rising force of the sludge is reduced, and Since the rate is also increased, the reaching distance of the injected hardening material jet is extended. In addition, the appropriate distance between the injection nozzle and the suction slit depends on the diameter of the injection rod and the type of curing material.
Although it depends on the injection pressure and the suction force, if an appropriate interval can be adjusted, extremely effective injection can be performed by the synergistic effect of injection and suction.
（実 施 例） 以下図面に従って本発明の実施例を説明する。１は注
入ロッドで操作機構２によって支持され、下降、上昇、
回転等の作動を与えられる。注入ロッド１は、噴射ノズ
ル３の核ノズル31、囲周ノズル32、吸収スリット５の各
開口部に開口する多重経路を有し、その先端部側壁には
重合噴射ノズル３が設けられる。(Examples) Examples of the present invention will be described below with reference to the drawings. 1 is an injection rod, which is supported by the operating mechanism 2 and is lowered, raised,
It is given operations such as rotation. The injecting rod 1 has multiple paths that open to the respective openings of the core nozzle 31, the surrounding nozzle 32, and the absorption slit 5 of the injection nozzle 3, and the superposition injection nozzle 3 is provided on the side wall of the tip end portion thereof.
重合噴射ノズル３は、スイベル４を介して供給される
硬化材、エアー、必要に応じて清水等を、各別の経路か
ら開口する核ノズル31或いは囲周ノズル32を通じて地中
に噴射する。The polymerization injection nozzle 3 injects the hardening material, air, and fresh water, etc., supplied through the swivel 4 into the ground through the nuclear nozzle 31 or the surrounding nozzle 32 opening from different paths.
注入ロッドの硬化材圧送経路７には超音波の発信素子
と受信素子をモールドしたトランスジューサー81と圧力
センサー82が設置され、カウンターシステム８にケーブ
ル接続されている。A pressure transmitter 82 and a transducer 81 molded with an ultrasonic wave transmitting element and an ultrasonic wave receiving element are installed in the hardening material pressure feed path 7 of the injection rod, and are connected to the counter system 8 by a cable.
５は吸引スリットで重合噴射ノズル３の上部に所定の
間隔を置いて開口し、吸引ポンプ51の作動により噴射ノ
ズル３からの噴射作動によって生ずる上昇スラッジを積
極的に吸引し、フィルタープレス６に送入する。なお、
吸引スリット５の上部に適宜のパッカーを設ければ、吸
引効果を高めることができる。Reference numeral 5 denotes a suction slit, which is opened at a predetermined interval above the superposition injection nozzle 3 and positively sucks the rising sludge generated by the injection operation from the injection nozzle 3 by the operation of the suction pump 51 and sends it to the filter press 6. To enter. In addition,
If a suitable packer is provided above the suction slit 5, the suction effect can be enhanced.
フィルタープレス６は開閉可能に並列された濾枠61と
剥離板62からなる濾過脱水室と濾枠と剥離板を支持する
支持枠63と支持枠を開閉枠67により作動して濾枠の開閉
を行うシャフト64からなる作動部からなっており、送入
部65から送入された泥水スラッジは送水圧で閉鎖された
濾過脱水室に充填され濾布68に濾過された濾過水だけが
流過して排水部66から排出され清水噴射用水等として再
び注入管１に供給される。The filter press 6 is a filter dehydration chamber composed of a filter frame 61 and a peeling plate 62 which are arranged in an openable and closable manner, a support frame 63 for supporting the filter frame and the peeling plate, and an opening and closing frame 67 for operating the filter frame to open and close the filter frame. The sludge sludge sent from the sending part 65 is filled in the filtration dehydration chamber closed by the sending pressure, and only the filtered water filtered by the filter cloth 68 flows through. The water is discharged from the drainage unit 66 and supplied to the injection pipe 1 again as fresh water for injection.
フィルタープレス６は7kg/cm2程度の流圧で自動的に
濾過作用を行うが、本発明の場合には吸引作用を伴うの
で、更に強力なものを用いてシステム化すれば効果的で
ある。The filter press 6 automatically performs a filtration action with a flow pressure of about 7 kg / cm 2, but in the case of the present invention, it is accompanied by a suction action, so it is effective to systemize it by using a stronger one.
脱水されたスラッジはケーキ化されシャフト64の作動
によって定期的に開枠される濾枠から剥離板によって剥
離されて落下する。The dewatered sludge is caked and peeled off by the peeling plate from the filter frame that is opened periodically by the operation of the shaft 64 and falls.
以上のような装置システムを用い、注入ロッド１は回
転等の適宜手段によって対象地盤に下降挿入される。Using the device system as described above, the injection rod 1 is lowered and inserted into the target ground by an appropriate means such as rotation.
所定深度において、重合噴射ノズル３の核ノズル31か
ら地盤硬化材を200kgf/cm2程度の高圧力、流量100/mi
n前後で噴射し、囲周ノズル32からエアー（場合によっ
ては囲周ノズル32の外側を更に囲周する囲周ノズルを設
け、その囲周ノズルから清水を噴射し、場合によっては
エアーも清水も噴射せずに）を噴射しながら注入ロッド
１を回転上昇させ、更にポンプ51を作動させると噴射に
よる破砕力を失って飽和状態となった泥水スラッジが吸
引スリットから吸引され、吸引経路52を通じてフィルタ
ープレス６に送入される。重合噴射ノズル３から高圧噴
射された硬化材はスラッジ吸引によって空隙率の増した
周辺土壌を攪拌混合して円柱上に地盤硬化材注入層を造
成して行く。この間、硬化材圧送経路７に設置されたト
ランジューサー81による超音波発信と圧力センサー82に
よる流量計測が地上のカウンターシステムにより捕捉さ
れ、地上からの注入管理が行われる。At a predetermined depth, the ground hardening material is applied from the core nozzle 31 of the superposition injection nozzle 3 to a high pressure of about 200 kgf / cm 2 and a flow rate of 100 / mi.
Inject around before and after n, and air from the surrounding nozzle 32 (In some cases, a surrounding nozzle that further surrounds the outside of the surrounding nozzle 32 is provided, and fresh water is injected from the surrounding nozzle. When the injection rod 1 is rotated up while spraying (without spraying) and the pump 51 is further operated, the muddy water sludge that has lost the crushing force due to the spray and is saturated is sucked from the suction slit, and is filtered through the suction path 52. It is sent to the press 6. The hardening material injected at a high pressure from the superpositioning injection nozzle 3 stirs and mixes the surrounding soil with an increased porosity by sludge suction to form a ground hardening material injection layer on the column. During this time, the ultrasonic wave transmission by the transducer 81 and the flow rate measurement by the pressure sensor 82 installed in the hardening material pressure feed path 7 are captured by the counter system on the ground, and the injection management from the ground is performed.
なお、硬化材についての瞬結混合構造として核ノズル
からＡ液、囲周ノズルからＢ液を噴射すれば、噴射口で
両液は混合反応されて瞬結性の注入層が造成され、硬化
を急ぐ場合等に対応することができる。In addition, if the liquid A is injected from the core nozzle and the liquid B is injected from the surrounding nozzle as an instantaneous mixing structure for the curing material, the both liquids are mixed and reacted at the injection port to form an instantaneous injection layer to cure the liquid. It is possible to deal with urgent situations.
（発明の効果） 本発明は以上のように構成したので、注入効果を減殺
し、公害の発生因ともなる泥水スラッジを噴射ノズルの
直近において吸引除去すると共に、地上からの注入管理
により噴射圧を効果的にして硬化材噴流の到達距離を伸
長し、純度の高い大経の硬化材注入層が造成できる。更
に、配水スラッジの処理を同時に行うことができ、作業
面、コスト面の両面から効率を高める効果がある。(Effect of the invention) Since the present invention is configured as described above, the injection pressure is reduced and the muddy water sludge that causes pollution is sucked and removed in the immediate vicinity of the injection nozzle, and the injection pressure is controlled by injection control from the ground. Effectively, the reaching distance of the hardening material jet can be extended, and a high-purity large diameter hardening material injection layer can be formed. Further, the treatment of the distribution sludge can be carried out at the same time, which has the effect of increasing the efficiency in terms of both work and cost.
図は本発明の実施例を示すもので、第１図は施工状況を
示す全体説明図、第２図は注入ロッド先端部の拡大説明
図、第３図はフィルタープレスの開閉状況を示す説明
図、第４図は同じく濾枠と開閉枠の関係を半面ずつで示
したフィルタープレスの側面図、第５図はトランスジュ
ーサーの設置状況を示す硬化材圧送経路７の横断面図で
ある。 １〜注入ロッド、２〜操作機構、３〜重合噴射ノズル、
31〜核ノズル、32〜囲周ノズル、４〜スイベル、５〜吸
引スリット、51〜吸引ポンプ、６〜フィルタープレス、
61〜濾枠、62〜剥離板、63〜支持枠、64〜シャフト、65
〜送入部、66〜排水部、67〜開閉枠、68〜濾布、７〜硬
化材圧送経路、８〜カウンターシステム、81〜トランス
ジューサー、82〜圧力センサー、83〜記録装置、84〜デ
ィスプレイ Ａ〜超音波の発信素子、Ｂ〜超音波の受信素子 Ｃ〜噴射エアー、Ｄ〜噴射硬化材FIG. 1 shows an embodiment of the present invention, FIG. 1 is an overall explanatory view showing a construction state, FIG. 2 is an enlarged explanatory view of a tip portion of an injection rod, and FIG. 3 is an explanatory view showing an opening / closing state of a filter press. FIG. 4 is a side view of the filter press showing the relationship between the filter frame and the open / close frame half by half, and FIG. 5 is a cross-sectional view of the hardening material pressure-feeding path 7 showing the installation state of the transducer. 1-injection rod, 2-operation mechanism, 3-polymerization injection nozzle,
31-Nucleus nozzle, 32-Encircle nozzle, 4-Swivel, 5-Suction slit, 51-Suction pump, 6-Filter press,
61-filter frame, 62-release plate, 63-support frame, 64-shaft, 65
-Inlet part, 66-drainage part, 67-opening / closing frame, 68-filter cloth, 7-curing material pressure-feeding route, 8-counter system, 81-transducer, 82-pressure sensor, 83-recording device, 84-display A: ultrasonic wave transmitting element, B: ultrasonic wave receiving element C: jet air, D: jet hardening material
───────────────────────────────────────────────────── フロントページの続き (72)発明者 中嶋 志朗 大阪府吹田市佐竹台３―１―５ (72)発明者 中西 渉 東京都町田市三輪緑山１―26―11 (56)参考文献 特開 平１−318616（ＪＰ，Ａ) 特開 平１−315518（ＪＰ，Ａ) 特開 昭62−141220（ＪＰ，Ａ) 実開 昭58−69035（ＪＰ，Ｕ) ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Shiro Nakajima 3-1-5 Satakedai, Suita City, Osaka Prefecture (72) Inventor Wataru Nakanishi 1-26-11, Miwa Midoriyama, Machida City, Tokyo (56) References 1-318616 (JP, A) JP 1-315518 (JP, A) JP 62-141220 (JP, A) JP 58-69035 (JP, U)
Claims (4)
射ノズルから所定間隔を置いた上部に吸引スリットを開
口させた注入ロッドを対象地盤に挿入し、重合噴射ノズ
ルの核ノズルから高圧で地盤硬化材、囲周ノズルからエ
アを噴射する一方、この噴射によって上昇する地盤内圧
と過剰泥水スラッジをノズル上部に開口する吸引スリッ
トを通じて地上の吸引ポンプによって吸引し、ロッド内
に独立して設けたスラッジ収集経路を通じて排出しなが
ら注入ロッドを回動させつつ引き抜き移動することによ
り地盤硬化材を圧力注入することを特徴とする地盤硬化
材圧力注入工法1. A superposition injection nozzle is provided on a side wall of a tip portion, and an injection rod having a suction slit opened at an upper portion spaced from the injection nozzle by a predetermined distance is inserted into a target ground, and high pressure is applied from a core nozzle of the superposition injection nozzle. Air is injected from the ground hardening material and surrounding nozzle, while the ground pressure rising by this injection and excess sludge sludge are sucked by a suction pump on the ground through a suction slit that opens at the top of the nozzle, and are independently installed in the rod. Geotechnical hardening material pressure injection method characterized in that the geohardening material is pressure-injected by rotating and pulling out the injection rod while discharging it through the sludge collection path.
れ、多重分隔経路を有する注入ロッドの先端部側壁に重
合噴射ノズルを設け、同噴射ノズルから所定間隔を置い
た上部に、ロッド内に独立して設けたスラッジ収集経路
に通じる吸引スリットを開口させると共に、吸引スリッ
トとスラッジ収集経路に連携する吸引ポンプを設定した
ことを特徴とする地盤硬化材圧力注入装置2. A superposition injection nozzle is provided on the side wall of the tip end of an injection rod having a multi-divided path, which is supported by a rotating mechanism and an advancing / retracting mechanism. The ground hardening material pressure injecting device is characterized in that a suction slit communicating with the sludge collection path provided in the above is opened, and a suction pump linked to the suction slit and the sludge collection path is set.
を、スラッジをスラッジケーキと濾過水とに分離して処
理するフィルタープレスに連絡させるようにした特許請
求の範囲（２）記載の地盤硬化材圧力注入装置3. The ground hardening material pressure according to claim 2, wherein the sludge collecting path opening the suction slit is connected to a filter press for separating sludge into sludge cake and filtered water for processing. Injection device
ら重合噴射ノズルの硬化材噴射ノズルに連絡する硬化材
圧送経路中に、超音波の発信素子と受信素子をモールド
したトランスジューサーを設置した特許請求の範囲
（２）記載の地盤硬化材圧力注入装置4. A transducer in which an ultrasonic wave transmitting element and a receiving element are molded is installed in a hardening material pressure-feeding path which is built in an injection rod and communicates with a hardening material injection nozzle of a polymerization injection nozzle from a hardening material supply mechanism. Ground hardening material pressure injection device according to claim (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2151578A JP2529004B2 (en) | 1990-06-12 | 1990-06-12 | Ground hardening material pressure injection method and its equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2151578A JP2529004B2 (en) | 1990-06-12 | 1990-06-12 | Ground hardening material pressure injection method and its equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0444513A JPH0444513A (en) | 1992-02-14 |
| JP2529004B2 true JP2529004B2 (en) | 1996-08-28 |
Family
ID=15521583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2151578A Expired - Lifetime JP2529004B2 (en) | 1990-06-12 | 1990-06-12 | Ground hardening material pressure injection method and its equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2529004B2 (en) |
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| US9541118B2 (en) | 2013-09-23 | 2017-01-10 | The Boeing Company | Systems and methods for use in covering a portion of a fastener protruding from a surface |
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|---|---|---|---|---|
| JPS5869035U (en) * | 1981-10-31 | 1983-05-11 | 株式会社神戸製鋼所 | Air recovery stirring blade device for injection stirring type ground improvement machine |
| JPS62141220A (en) * | 1985-12-12 | 1987-06-24 | Nippon Kiso Gijutsu Kk | Ground improving work |
| JPH07892B2 (en) * | 1988-03-14 | 1995-01-11 | 株式会社エヌ、アイ、ティ | Ground improvement method by ultra-high pressure mixed hardening agent jet and its equipment |
| JPH0629506B2 (en) * | 1988-06-20 | 1994-04-20 | 株式会社エヌ、アイ、テイ | Ground hardening material injection method |
-
1990
- 1990-06-12 JP JP2151578A patent/JP2529004B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0444513A (en) | 1992-02-14 |
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