JPH01318616A - Method of construction for ground hardener injecting - Google Patents
Method of construction for ground hardener injectingInfo
- Publication number
- JPH01318616A JPH01318616A JP15033888A JP15033888A JPH01318616A JP H01318616 A JPH01318616 A JP H01318616A JP 15033888 A JP15033888 A JP 15033888A JP 15033888 A JP15033888 A JP 15033888A JP H01318616 A JPH01318616 A JP H01318616A
- Authority
- JP
- Japan
- Prior art keywords
- injection
- nozzle
- hardening material
- sludge
- jet
- 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
- 238000000034 method Methods 0.000 title claims description 9
- 239000004848 polyfunctional curative Substances 0.000 title abstract 4
- 238000010276 construction Methods 0.000 title description 3
- 239000010802 sludge Substances 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 239000002689 soil Substances 0.000 claims abstract description 11
- 238000002347 injection Methods 0.000 claims description 61
- 239000007924 injection Substances 0.000 claims description 61
- 239000000463 material Substances 0.000 claims description 30
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 9
- 238000004140 cleaning Methods 0.000 abstract description 5
- 230000002708 enhancing effect Effects 0.000 abstract description 2
- 230000001174 ascending effect Effects 0.000 abstract 2
- 239000011800 void material Substances 0.000 abstract 2
- 230000000630 rising effect Effects 0.000 description 8
- 230000001965 increasing effect Effects 0.000 description 7
- 239000013505 freshwater Substances 0.000 description 4
- 238000007596 consolidation process Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000003570 air Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
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注入工法に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for injecting a soil hardening material for the purpose of stabilizing soft ground, foundations for structures, supporting ground, etc.
（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−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管挿入
口にバンカーを設けて地中に押し戻すか、地上に浴出さ
せて垂れ流すかの対応しかなされていない。(Conventional technology) Conventionally, there are high-pressure injection and low-pressure injection for the injection of soil hardening materials, and high-pressure injection can be further considered to include displacement filling and consolidation filling, and multi-stage injection using slow setting and instant setting injection forms depending on the consolidation time. Many construction methods such as , composite injection, etc. have been developed. However, in either case, the air hardening agent is not absorbed and impregnated into the target ground, and a large amount of rising sludge is generated. The only countermeasures to deal with this rising sludge are to install a bunker at the injection pipe insertion port and push it back into the ground, or to let it flow out onto the ground.
（発明が解決しようとする問題点）
従来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) Conventional measures to deal with rising sludge cannot completely push the sludge back into the ground, not only when it is drained, but even when a packer is installed, and it is not possible to completely push the sludge back into the ground, resulting in a muddy water containing various components. sludge treatment is extremely expensive. Of course, sludge is industrial waste, and if left untreated, it can cause pollution.In its form, it is a highly viscous fluid that is extremely difficult to handle, and there are many problems in transporting the actual material to treatment facilities, resulting in lower treatment costs. This is accelerating the rise in 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, by pushing back the sludge with the packer or leaving it in a dripping state, there are 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。これが
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。That is, the sludge in the target ground directly increases the density of the ground, reduces the injection pressure of the hardening material, and dilutes the injected hardening material to lower its purity. Not only does this affect the consolidation strength, but the treatment of rising sludge also leaves many problems regarding 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
上昇スラッジを積極的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。更に重合構造の下側噴射ノズルと上側噴
射ノズルを設けて下側から地盤硬化材、上側から高圧水
とこれを囲周するエアーを噴射して先行噴射を行なうこ
とにより夾雑物が除かれ、洗浄が行なわれて洗浄水自体
もスラッジと共に吸引除去されるので、注入空隙率を増
し、硬化材の純度を高めて注入効果を飛躍的に高める。(Means for Solving the Problems) The present invention improves the injection effect by actively suctioning and collecting the rising sludge that has been pushed back or dripped out as a nuisance, and also processes the sludge all at once, improving work efficiency. , attempts to solve problems from both aspects of injection effects. In addition, a lower injection nozzle and an upper injection nozzle with a polymeric structure are installed to perform preliminary injection by injecting soil hardening material from the bottom and high-pressure water and surrounding air from the top to remove foreign matter and clean it. is carried out, and the cleaning water itself is suctioned away along with the sludge, increasing the injection porosity and increasing the purity of the hardening material, thereby dramatically enhancing the injection effect.
また、下側噴射ノズルも重合構造に構成し核ノズルから
２液性硬化材のＡ液、囲周ノズルからＢ液を噴射して重
合させれば、瞬結注入にも対応することができる。In addition, if the lower injection nozzle is also configured to have a polymeric structure, and the two-component curing material A liquid is injected from the core nozzle and B liquid is injected from the peripheral nozzle for polymerization, instantaneous setting injection can also be supported.
（作 用）
上昇スラッジが吸引ポンプ等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、清水噴射が加わると吸
引された地下水や粘性土が除去された後の空隙部にまで
噴射された清水が入り込んで吸引されるので、洗浄効果
を高め噴射された硬化材の純度を高める作用がある。(Function) When the rising sludge is sucked up by a suction pump, etc., the load on the hardening material injection pressure and the jetting air that are loaded on the rising force of the sludge decreases, and the porosity increases, so the injected hardening material jet The reach distance is increased. In addition, when fresh water is sprayed, the sprayed fresh water enters and is sucked into the voids after the sucked-in groundwater and clay soil have been removed, increasing the cleaning effect and increasing the purity of the sprayed hardening material. There is.
（実 施 例） 以下図面に従って本発明の詳細な説明する。(Example) The present invention will be described in detail below with reference to the drawings.
１は注入管で操作機構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。注入管１の先端部側壁に
は噴射ノズル３が設けられ、スイベル４を介して供給さ
れる硬化材、清水、エアー等を地中に噴射する。Reference numeral 1 denotes an injection tube, which is supported by an operating mechanism 2 and is given operations such as lowering, raising, and rotation. A spray nozzle 3 is provided on the side wall of the tip of the injection pipe 1, and sprays hardening material, fresh water, air, etc. supplied via a swivel 4 into the ground.
５はスラッジ吸引部で吸引ポンプ５１の作動により上昇
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。Reference numeral 5 denotes a sludge suction section which actively sucks rising sludge by operating a suction pump 51 and sends it to a filter press 6.
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
開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 includes a filtration/dehydration chamber consisting of a filter frame 61 and a peeling plate 62 that are arranged in parallel so that they can be opened and closed, a support frame 63 that supports the filter frame and the peeling plate, and an opening/closing frame 67 that operates the support frame to open and close the filter frame. The muddy water sludge sent from the feeding part 65 is filled into a filtration and dehydration chamber which is opened by the water feeding pressure, and only the filtered water filtered through the filter cloth 68 flows. The water is discharged from the drainage section 66 and supplied to the injection pipe 1 again as fresh water injection water or the like.
フィルタープレス６は７ｋｇ／ｃｄ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/cd, but in the case of the present invention, it is accompanied by a suction action, so it would be effective to systemize it using a more powerful 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 formed into a cake and is peeled off by a peeling plate and falls from the filter frame, which is periodically opened by the operation of the shaft 64.
以上のような装置システムを用い、注入管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 apparatus system as described above, the injection pipe 1 is lowered and inserted into the target ground by appropriate means such as rotation.
所定深度において、上側噴射ノズル３１の核ノズル３２
から清水Ｂ、囲周ノズル３３からエアーＡ、更に下側噴
射ノズル３４から硬化材を高圧力で噴射しながら注入管
を回転上昇させ、更にポンプ５１を作動させると噴射と
洗浄によって飽和状態となった泥水スラッジが注入管の
挿入クリアランスに沿って上昇してフィルタープレス６
に送入される。下側噴射ノズル３４から高圧噴射された
硬化材は洗浄と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。また、下側噴射ノズルを重合構造として核ノ
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。At a predetermined depth, the core nozzle 32 of the upper injection nozzle 31
The injection pipe is rotated upward while spraying clean water B, air A from the surrounding nozzle 33, hardening material at high pressure from the lower spray nozzle 34, and further operating the pump 51, which results in a saturated state due to spraying and cleaning. The muddy water sludge rises along the insertion clearance of the injection pipe and enters the filter press 6.
will be sent to The hardening material injected at high pressure from the lower injection nozzle 34 stirs and mixes the surrounding soil, which has increased porosity through cleaning and sludge suction, to create a ground hardening material injection layer on the cylinder. In addition, if the lower injection nozzle has a polymer structure and injects liquid A from the core nozzle and liquid B from the peripheral nozzle, the two liquids will mix and react at the injection port to create an instant-setting injection layer.
This can be used when curing is required in a hurry.
また、核ノズルから硬化材、囲周ノズルからエアーを噴
射すれば、硬化材の到達距離を伸長し、エアー効果かた
かめられる。Furthermore, by injecting the hardening material from the core nozzle and air from the circumferential nozzle, the reach of the hardening material can be extended and the air effect can be strengthened.
（発明の効果）
本発明は以上のように構成したので、噴射圧を効果的に
して硬化材噴流の到達距離を伸長し、純度の高い大径の
硬化材注入層が造成できると共に、泥水スラッジの処理
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。(Effects of the Invention) Since the present invention is configured as described above, it is possible to effectively increase the injection pressure to extend the reach of the hardening material jet, to create a large diameter hardening material injection layer with high purity, and to reduce muddy water sludge. This process can be carried out at the same time, increasing 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図は注入管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である。
１〜注入管 ２〜操作機構 ３〜噴射ノズル３１〜上側
噴射ノズル ３２〜核ノズル３３〜囲周ノズル ３４〜
下側噴射ノズル５〜スラッジ吸引部 ５１〜ポンプ
６〜フイルタープレス 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 Ａ〜エ
アー Ｂ〜清清
水Ｃ上エアーはＡ液 Ｄ〜〜化材又はＢ液特 許 出
願人 株式会社エヌ、アイ、ティ代理人弁理士 石
川 幸 吉
第１図The figures show an embodiment of the present invention, and Fig. 1 is an overall explanatory view showing the construction situation, Fig. 2 is an enlarged explanatory view of the tip of the injection tube, and Fig. 3 is an explanatory view showing the opening and closing situation of the filter press. Fourth
The figure is a side view of the filter press showing the relationship between the filter frame and the opening/closing frame in half. 1 - Injection pipe 2 - Operation mechanism 3 - Injection nozzle 31 - Upper injection nozzle 32 - Core nozzle 33 - Surrounding nozzle 34 -
Lower injection nozzle 5 - sludge suction part 51 - pump 6 - filter press 61 - filter frame 62 - peeling plate 63 - support frame 64 - shaft 65 - feeding part 66 - drainage part 67 - opening/closing frame 68 - filter cloth A Air B ~ Clear water C Upper air is A liquid D ~ ~ Chemical material or B liquid Patent issued
Patent attorney Ishi, N.I.T Co., Ltd.
Kawa Kokichi Figure 1
Claims (4)
ロッドを対象地盤に挿入操作して硬化材混入層を造成す
る工法において、地盤硬化材の注入時に上昇する泥水ス
ラッジを吸引することを特徴とする地盤硬化材注入工法(1) In the method of creating a hardening material mixed layer by inserting an injection rod with a soil hardening material injection nozzle on the side wall of the tip into the target ground, it is possible to suck up the muddy water sludge that rises when the soil hardening material is injected. Characteristic soil hardening material injection method
スにかけ、スラッジケーキと濾過水とに分離して処理す
るようにした特許請求の範囲（１）記載の地盤硬化材注
入工法(2) The soil hardening material injection method according to claim (1), wherein the sucked muddy water sludge is collected and applied to a filter press to separate and treat the sludge cake and filtered water.
ズルを設け、下側噴射ノズルからは硬化材若しくは２液
混合による瞬結性硬化材として核ノズルからＡ液、囲周
ノズルからＢ液、上側噴射ノズルからは核ノズルから高
圧水、囲周ノズルからエアーをそれぞれ噴射しつつ注入
管を操作して注入を行うようにした特許請求の範囲（１
）記載の地盤硬化材注入工法(3) A lower injection nozzle and an upper injection nozzle are provided on the tip side wall of the injection tube, and the lower injection nozzle is used as a hardening material or a flash-setting hardening material by mixing two liquids, such as liquid A from the core nozzle and liquid B from the peripheral nozzle. Claim 1: Injection is performed by operating the injection pipe while injecting liquid, high-pressure water from the core nozzle, and air from the peripheral nozzle from the upper injection nozzle.
) The soil hardening material injection method described in )
上側噴射ノズルを設け、下側噴射ノズルの核ノズルから
硬化材、囲周ノズルからエアーを、上側噴射ノズルの核
ノズルから高圧水、囲周ノズルからエアーをそれぞれ噴
射しつつ注入管を操作して注入を行うようにした特許請
求の範囲（１）記載の地盤硬化材注入工法(4) A lower injection nozzle and an upper injection nozzle with a polymer structure are provided on the tip side wall of the injection tube, and the curing material is supplied from the core nozzle of the lower injection nozzle, air is supplied from the surrounding nozzle, and high-pressure water is supplied from the core nozzle of the upper injection nozzle. , the ground hardening material injection method according to claim (1), wherein the injection is performed by operating the injection pipe while injecting air from the surrounding nozzles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63150338A JPH0629506B2 (en) | 1988-06-20 | 1988-06-20 | Ground hardening material injection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63150338A JPH0629506B2 (en) | 1988-06-20 | 1988-06-20 | Ground hardening material injection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01318616A true JPH01318616A (en) | 1989-12-25 |
| JPH0629506B2 JPH0629506B2 (en) | 1994-04-20 |
Family
ID=15494820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63150338A Expired - Lifetime JPH0629506B2 (en) | 1988-06-20 | 1988-06-20 | Ground hardening material injection method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0629506B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02183007A (en) * | 1989-01-10 | 1990-07-17 | Nit Co Ltd | Device for injecting ground hardening agent |
| JPH0444513A (en) * | 1990-06-12 | 1992-02-14 | Shiro Nakajima | Pressure injection of ground hardener and device |
| JPH0455515A (en) * | 1990-06-25 | 1992-02-24 | Shiro Nakajima | Slime sucking and injecting construction, and its device |
| JPH0489913A (en) * | 1990-08-01 | 1992-03-24 | Shiro Nakajima | Construction method of slime suction and hardener injection and its device |
| JP2019112776A (en) * | 2017-12-21 | 2019-07-11 | 株式会社エヌ、アイ、テイ | Ground hardener injection method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS514003A (en) * | 1974-04-05 | 1976-01-13 | Subsea Equipment Ass Ltd | |
| JPS62174412A (en) * | 1986-01-29 | 1987-07-31 | N I T:Kk | Method and apparatus for forming hardened ground layer |
| JPS62215712A (en) * | 1986-03-18 | 1987-09-22 | Mitsui Constr Co Ltd | Forming work of improved ground by multi-stage jet excavation |
-
1988
- 1988-06-20 JP JP63150338A patent/JPH0629506B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS514003A (en) * | 1974-04-05 | 1976-01-13 | Subsea Equipment Ass Ltd | |
| JPS62174412A (en) * | 1986-01-29 | 1987-07-31 | N I T:Kk | Method and apparatus for forming hardened ground layer |
| JPS62215712A (en) * | 1986-03-18 | 1987-09-22 | Mitsui Constr Co Ltd | Forming work of improved ground by multi-stage jet excavation |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02183007A (en) * | 1989-01-10 | 1990-07-17 | Nit Co Ltd | Device for injecting ground hardening agent |
| JPH0444513A (en) * | 1990-06-12 | 1992-02-14 | Shiro Nakajima | Pressure injection of ground hardener and device |
| JPH0455515A (en) * | 1990-06-25 | 1992-02-24 | Shiro Nakajima | Slime sucking and injecting construction, and its device |
| JPH0489913A (en) * | 1990-08-01 | 1992-03-24 | Shiro Nakajima | Construction method of slime suction and hardener injection and its device |
| JP2019112776A (en) * | 2017-12-21 | 2019-07-11 | 株式会社エヌ、アイ、テイ | Ground hardener injection method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0629506B2 (en) | 1994-04-20 |
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