JP3258989B2 - Ground hardening material overhang injection method - Google Patents
Ground hardening material overhang injection methodInfo
- Publication number
- JP3258989B2 JP3258989B2 JP25848299A JP25848299A JP3258989B2 JP 3258989 B2 JP3258989 B2 JP 3258989B2 JP 25848299 A JP25848299 A JP 25848299A JP 25848299 A JP25848299 A JP 25848299A JP 3258989 B2 JP3258989 B2 JP 3258989B2
- Authority
- JP
- Japan
- Prior art keywords
- injection
- nozzle
- hardening material
- overhanging
- rod
- 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
- 238000002347 injection Methods 0.000 title claims description 106
- 239000007924 injection Substances 0.000 title claims description 106
- 239000000463 material Substances 0.000 title claims description 61
- 238000000034 method Methods 0.000 title claims description 7
- 239000002689 soil Substances 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 238000006116 polymerization reaction Methods 0.000 claims description 6
- 238000003780 insertion Methods 0.000 description 6
- 230000037431 insertion Effects 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000002440 industrial waste Substances 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 3
- 239000011800 void material Substances 0.000 description 3
- 239000003570 air Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000013019 agitation Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Piles And Underground Anchors (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は軟弱地盤の改良、地
中の支保層や止水層の造成のための地盤硬化材を張出噴
射ノズルによって行う注入工法に関し、特に産業廃棄物
となる泥水スライムの発生を極力減少させると共にその
拡散浸透による周辺地盤への影響を防止して質の高い硬
化材注入層を造成するための、地盤硬化材張出注入工法
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of injecting a ground hardening material for improvement of soft ground and formation of an underground support layer and a waterproof layer by an overhanging injection nozzle, and in particular, muddy water as industrial waste. The present invention relates to a ground hardening material overhanging injection method for creating a high-quality hardening material injection layer by reducing the generation of slime as much as possible and preventing the influence of the diffusion and penetration on the surrounding ground.
【０００２】[0002]
【発明が解決しようとする課題】従来、軟弱地盤の改
良、地中の支保層や止水層の造成のための地盤硬化材注
入は、噴流の到達距離を延ばして硬化層の大径化を図る
ことを中心目的に、硬化材噴射圧力の超高圧化などが進
められてきた。Conventionally, injecting a ground hardening material for improving soft ground and for forming an underground support layer and a waterproof layer has been carried out by extending the reach of the jet and increasing the diameter of the hardened layer. Ultra-high pressure of the hardener injection pressure has been promoted for the main purpose.
【０００３】これに伴い、硬化材噴射圧が対象地盤の地
内圧を高め、地盤隆起や大量の余剰スライムの発生が問
題となった。そこで、注入ロッドにスライム吸引孔を設
けて地内圧を調整することが行なわれるようになってき
た。[0003] Along with this, the injection pressure of the hardening material increases the pressure in the ground of the target ground, and there has been a problem that the ground is raised and a large amount of excess slime is generated. Therefore, slime suction holes are provided in the injection rod to adjust the ground pressure.
【０００４】しかし、大量の余剰スライムは産業廃棄物
となってその処理に多大な費用が必要になると共に、産
業廃棄物の完全処理が困難な状況から余剰スライムの発
生自体が環境汚染にも繋がりかねない事態となってきて
いる。[0004] However, a large amount of excess slime becomes industrial waste and requires a great deal of cost for its disposal. In addition, since it is difficult to completely treat industrial waste, the generation of excess slime itself leads to environmental pollution. It is becoming a situation that may be happening.
【０００５】また、高深度の対象地盤への注入要請と大
口径注入層の造成要請が強くなるにつれ、注入ロッドの
長尺化が回動等の作動に反力を生じさせ、ロッドの作動
に対する動力の確実な伝播が行われ難くなってきている
問題も生じている。[0005] Further, as the demand for injection into a target ground at a high depth and the demand for forming a large-diameter injection layer increase, the lengthening of the injection rod causes a reaction force in the operation such as rotation, and the operation of the rod is less affected. There is also a problem that it is becoming difficult to reliably transmit power.
【０００６】[0006]
【課題を解決するための手段】そこで、本発明は硬化材
により置換されるべき土壌を確実に地上に排出し、これ
によって形成されるコア空隙部をロッドに設定したリン
グ翼によって支持することによって長尺ロッドの作動反
力を吸収すると共に噴射硬化材と硬化材噴射圧をコア空
隙部に吸収させて側圧を軽減させ、周辺地盤への影響を
減少させて、しかも地盤の改良効果、支保層や止水層の
造成効果を充分に確保できるようにしたものである。SUMMARY OF THE INVENTION Accordingly, the present invention provides a method for reliably discharging the soil to be replaced by a hardening material to the ground, and supporting a core space formed by the soil by a ring blade set on a rod. It absorbs the reaction force of the long rod and absorbs the injection hardening material and the hardening material injection pressure into the core gap to reduce the side pressure, reduce the effect on the surrounding ground, and further improve the ground, support layer And the effect of creating a water blocking layer can be sufficiently ensured.
【０００７】すなわち、張出噴射ノズルを備えたモニタ
ー部の上部に、スクリュウオーガー部と、これを囲繞し
てオーガー部外周に支持されるリング翼を備え、その上
部のロッド側壁に所定間隔を置いて複数の噴射孔と着脱
可能なパーツオーガーの装着部を設けた注入ロッドを、
対象地盤が含水比の低い地盤である場合には張出噴射ノ
ズルから水、側壁の複数噴射孔からエアーを噴出しなが
ら、含水比の低い地盤である場合には水噴射を行わず
に、必要に応じてパーツオーガーを補充装着して対象地
盤に回動しつつ下降させて挿入し、所定深度に達したと
ころで、張出噴射ノズルから硬化材を高圧噴射しなが
ら、注入ロッドを回動しつつ抜去方向に移動してオーガ
ーの回動とリング翼の支持切削によって構成されるコア
空隙部と硬化材噴流による切削攪拌部に硬化材を注入す
るようにした。That is, a screw auger portion and a ring wing surrounding the screw auger portion and supported on the outer periphery of the auger portion are provided above the monitor portion provided with the overhanging injection nozzle, and are spaced apart from the rod side wall on the upper portion by a predetermined distance. An injection rod with multiple injection holes and a detachable parts auger mounting part,
When the target ground is a ground with a low water content, water is jetted from the overhanging injection nozzle, and air is jetted from multiple injection holes on the side wall. In accordance with the above, the parts auger is replenished and inserted into the target ground while lowering while rotating, and when reaching the predetermined depth, while injecting the hardening material with high pressure from the overhanging injection nozzle, while rotating the injection rod The hardening material was injected into the core gap formed by the rotation of the auger and the support cutting of the ring blade by moving in the withdrawal direction, and into the cutting agitation section by the hardening material jet.
【０００８】また、硬化材注入層の径を更に大口径にす
る場合には、張出噴射ノズルを核ノズルと囲周ノズルか
ら成る重合噴射ノズルに構成し、ロッドの抜去方向への
移動時に張出噴射ノズルの核ノズルから硬化材、囲周ノ
ズルからからエアーを噴射するようにし、張出噴射ノズ
ルから噴射される硬化材噴流の周囲をエアーによって包
んで周辺土壌の抵抗を軽減すると共に、ノズルの張出翼
の周面を伝ってスクリュウオーガー部等によって形成さ
れるコア空隙部に排出されるエアーが余剰硬化材をコア
空隙部に導くように構成した。In order to further increase the diameter of the hardening material injection layer, the overhanging injection nozzle is constituted by a polymerization injection nozzle comprising a nucleus nozzle and a peripheral nozzle, and the overhanging injection nozzle is stretched when the rod moves in the withdrawal direction. Injecting the hardening material from the core nozzle of the ejection spray nozzle and air from the surrounding nozzle, wrapping the surroundings of the hardening material jet sprayed from the overhanging nozzle with air to reduce the resistance of the surrounding soil, and the nozzle The air discharged along the peripheral surface of the overhanging wing into the core gap formed by the screw auger section and the like guides the excess hardened material to the core gap.
【０００９】施工は、先ず、対象地盤の環境に応じて張
出噴射ノズルと側壁の複数噴射孔から水を噴射し、或い
は何も噴射しないまま、必要に応じてパーツオーガーを
補充装着して対象地盤に回動しつつ下降させると、スク
リュウオーガー部がロッドの回動によって弛められた対
象地盤を切削揚土し、その外周に支持されるリング翼が
切削部土壌の形状規制と孔壁保持を行ないながら下降し
てリング翼に支持されるコア空隙部が形成される。In the construction, first, water is sprayed from the overhanging spray nozzle and a plurality of spray holes on the side wall according to the environment of the target ground, or a part auger is replenished and mounted as necessary without spraying anything. When the screw auger is lowered while rotating on the ground, the screw auger cuts and lifts the target ground loosened by the rotation of the rod, and the ring wings supported on its outer periphery regulate the shape of the cut part soil and maintain the hole wall. Is performed, and a core gap supported by the ring blade is formed.
【００１０】また、対象地盤の状況によっては、先ず、
張出噴射ノズルから水、ロッド側壁の複数噴射孔からエ
アーを噴出しながら、対象地盤に注入ロッドを回動しつ
つ下降させると、スクリュウオーガー部が水とエアーに
よって弛められた対象地盤を切削揚土し、その上部のロ
ッド側壁噴射孔から噴出されるエアーによってロッド挿
入口にリフトされ、同時に下降するリング翼に支持され
るコア空隙部が形成される。[0010] Depending on the condition of the target ground,
When the injection rod is lowered while rotating the injection rod to the target ground while jetting water from the overhanging injection nozzle and water from multiple injection holes on the rod side wall, the screw auger part cuts the target ground loosened by water and air The earth is lifted, lifted to the rod insertion port by the air blown out from the rod side injection hole at the top, and simultaneously forms a core gap supported by the descending ring blade.
【００１１】所定深度に達したところで、張出噴射ノズ
ルから硬化材を高圧噴射しながら、注入ロッドを回動し
つつ抜去方向に移動すれば、リング翼によってコア空隙
部に支持されたロッドは作動反力を吸収されて確実に動
作すると共に噴射硬化材と硬化材噴射圧をコア空隙部に
吸収して造成範囲の確実な硬化材注入層が造成されるよ
うにした。When a predetermined depth is reached, while the injection rod is moved in the withdrawal direction while rotating the injection rod while high-pressure injection of the hardening material from the overhanging injection nozzle, the rod supported in the core gap by the ring wing operates. The reaction force is absorbed to operate reliably, and the injection hardening material and the injection pressure of the hardening material are absorbed in the core gap so that the hardened material injection layer in the formation range is formed reliably.
【００１２】対象地盤の状況によってエアー噴射を用い
る場合には、所定深度に達したところで、張出噴射ノズ
ルから硬化材を高圧噴射し、ロッド側壁の複数噴出孔か
らエアーを噴出しながら、注入ロッドを回動しつつ抜去
方向に移動すれば、リング翼によってコア空隙部に支持
されたロッドは作動反力を吸収されて確実に動作すると
共に噴射硬化材と硬化材噴射圧をコア空隙部に吸収さ
れ、余剰地内圧はスクリュウオーガー部の回動搬送に加
えて、ロッド側壁噴出孔から噴出されるエアーによって
ロッド挿入口にリフトされて造成範囲の確実な硬化材注
入層が造成されるようにした。When air injection is used depending on the condition of the target ground, when a predetermined depth is reached, a hardening material is injected at a high pressure from an overhanging injection nozzle, and air is injected from a plurality of injection holes in the rod side wall. If the rod is moved in the removal direction while rotating, the rod supported in the core gap by the ring wing absorbs the operation reaction force and operates reliably and absorbs the injection hardening material and the hardening material injection pressure in the core gap. Then, in addition to the rotation and conveyance of the screw auger part, the surplus ground pressure is lifted to the rod insertion port by air ejected from the rod side wall ejection hole, so that a hardened material injection layer in the formation range is formed reliably. .
【００１３】核ノズルと囲周ノズルから成る重合噴射ノ
ズルに構成した張出噴射ノズルを用いる場合には、所定
深度に達したところで、張出噴射ノズルの核ノズルから
硬化材、囲周ノズルからからエアーを噴射しながら、注
入ロッドを回動しつつ抜去方向に移動すれば、張出噴射
ノズルから噴射される硬化材噴流の周囲をエアーによっ
て包んで周辺土壌の抵抗を軽減すると共に、ノズルの張
出翼の周面を伝ってスクリュウオーガー部等によって形
成されるコア空隙部に排出されるエアーが余剰硬化材を
コア空隙部に導いて過剰噴射硬化材と硬化材噴射圧をコ
ア空隙部に吸収し、リング翼によってコア空隙部に支持
されたロッドは作動反力を吸収して確実に動作すると共
に造成範囲の確実な硬化材注入層が造成される。In the case of using the overhanging injection nozzle configured as a polymerization injection nozzle composed of a core nozzle and a surrounding nozzle, when a predetermined depth is reached, the hardening material from the core nozzle of the overhanging nozzle and the surrounding material from the surrounding nozzle are used. If the injection rod is moved in the withdrawal direction while rotating while injecting air, the surroundings of the hardening material jet injected from the overhanging injection nozzle are wrapped with air to reduce the resistance of the surrounding soil, and the nozzle is stretched. The air discharged along the peripheral surface of the blade and discharged into the core gap formed by the screw auger guides the excess hardened material to the core gap and absorbs the excess injection hardened material and the hardened material injection pressure into the core gap. Then, the rod supported in the core gap by the ring wing absorbs the operation reaction force and operates reliably, and the hardened material injection layer within the formation range is formed reliably.
【００１４】[0014]
【発明の実施の形態】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、先端部は切替えによっ
てそれぞれ複数噴射材を噴射可能な張出噴射ノズル21と
22が開口するモニター部２が装着され、その上部にスク
リュウオーガー部３と、これを囲繞してオーガー部外周
に支持されるリング翼４が設定され、更に、その上部に
継接される継接ロッド11には側壁に所定間隔を置いて複
数の噴射孔12、12・・と着脱可能なパーツオーガーの装
着部13・・が設けられている。Embodiments of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes an injection rod, and a tip portion is provided with an overhanging injection nozzle 21 capable of injecting a plurality of injection materials by switching.
A monitor section 2 having an opening 22 is mounted thereon, and a screw auger section 3 and a ring wing 4 surrounding the auger section and supported by an outer periphery of the auger section are set on the monitor section 2, and further connected thereto. The rod 11 is provided with a plurality of injection holes 12, 12,... At a predetermined interval on a side wall thereof, and a mounting part 13,.
【００１５】リング翼４はプレート条帯、若しくはパイ
プによって構成したリングを、ロッド側壁からの支持腕
41によって上下からスクリュウオーガー部３の周囲に支
持固定して設定される。The ring wing 4 is a ring formed by a plate strip or a pipe, and a supporting arm from a rod side wall.
By 41, it is supported and fixed around the screw auger section 3 from above and below.
【００１６】また、モニター部２の張出噴射ノズル21と
22は、対峙方向に段差をつけて開口させ、或いは噴射ノ
ズル21のみを単独設定する等、注入環境に対応して変化
させるものであり、継接ロッド11の複数の噴出孔12と着
脱可能なパーツオーガーの装着部13は注入環境に対応し
た間隔で適宜に配置され、ロッド11の継接時にパーツオ
ーガー14を必要に応じて装着する。なお、対象地盤の深
度が深い場合には所定間隔毎にリング翼４を複数設定す
る。The overhanging injection nozzle 21 of the monitor 2
22 is changed in accordance with the injection environment, such as opening with a step in the facing direction, or setting only the injection nozzle 21 alone, and is removable with a plurality of ejection holes 12 of the connecting rod 11. The mounting parts 13 of the parts auger are appropriately arranged at intervals corresponding to the injection environment, and mount the parts auger 14 as necessary when the rod 11 is connected. When the depth of the target ground is deep, a plurality of ring blades 4 are set at predetermined intervals.
【００１７】注入ロッド１は、その後端がスイベル５と
なっており、圧送ポンプ装置を介して水、エアー等を供
給する切削材料供給部に連絡するホース51、同じく圧送
ポンプ装置を介して地盤硬化材を供給する充填材料供給
部に連絡するホース52に連結すると共に、注入ロッド作
動機構６に支持される。The pouring rod 1 has a swivel 5 at its rear end, and a hose 51 that communicates with a cutting material supply section that supplies water, air, etc. via a pumping pump device. It is connected to a hose 52 communicating with a filling material supply section for supplying the material, and is supported by the injection rod operating mechanism 6.
【００１８】注入ロッド作動機構６は、注入ロッド１を
回動、進退、或いは斜降角度を変化させる操作駆動機構
61を備え、対象地盤に対して所定の角度をもって掘削推
進させ、回動後退させるようになっている。The injection rod operating mechanism 6 is an operation drive mechanism for rotating, moving forward and backward, or changing the tilt angle of the injection rod 1.
61 is provided, and the excavation is promoted at a predetermined angle with respect to the target ground, and the drill is retreated.
【００１９】また、張出噴射ノズルを重合噴射ノズルと
する場合には、図４に示すようにロッドの地盤硬化材供
給経路に連通する核ノズル23とエアー供給経路に連通す
る囲周ノズル24が重合して張出噴射ノズルが構成され
る。When the overhanging injection nozzle is a polymerization injection nozzle, as shown in FIG. 4, a core nozzle 23 communicating with the ground hardening material supply path of the rod and a surrounding nozzle 24 communicating with the air supply path are provided. The overhanging injection nozzle is formed by polymerization.
【００２０】このように装置された注入ロッド１を対象
地盤Ｘに向けて張出噴射ノズル21、22からリング翼４の
径範囲を弛める程度の圧力で水或いは水とエアーを噴射
し、ロッド側壁の複数噴出孔12、12・・から水或いはエ
アーを噴射しながら、対象地盤に回動しつつ下降させれ
ば、弛められた周辺土壌はスクリュウオーガー31とロッ
ド11に装着されたパーツオーガー14によって揚土され、
リング翼４を沈下してコア空隙部Ｙが形成される。更に
複数噴出孔12からの噴出エアーによってロッド挿入口に
リフトしてコア空隙部Ｙが形成される。Water or water and air are injected from the overhanging injection nozzles 21 and 22 at such a pressure as to loosen the diameter range of the ring wing 4 toward the target ground X by injecting the injection rod 1 having such a structure toward the target ground X. When water or air is sprayed from the plurality of ejection holes 12 and 12, while rotating down to the target ground and lowered, the loosened surrounding soil is screw auger 31 and the parts auger 14 attached to the rod 11 Excavated by
The core gap Y is formed by sinking the ring blade 4. Further, the air is ejected from the plurality of ejection holes 12 and lifted to the rod insertion opening to form the core gap Y.
【００２１】なお、対象地盤Ｘの含水比が高い場合に
は、張出噴射ノズル、複数噴出孔12からの水或いは水と
エアーの噴射は行わないでそのままロッドを回動下降さ
せ、スクリュウオーガー31とリング翼４の回動によって
周辺土壌を弛め、スクリュウオーガー31とパーツオーガ
ー14によって揚土し、コア空隙部Ｙを形成する。When the water content of the target ground X is high, the rod is rotated down without injecting water or water and air from the overhanging injection nozzles and the plurality of injection holes 12, and the screw auger 31 is rotated. The surrounding soil is loosened by the rotation of the ring wing 4 and the soil is lifted by the screw auger 31 and the parts auger 14 to form a core gap Y.
【００２２】ロッド１が最初の継接ロッド11の長さまで
挿入されると、その上にロッド11を次々に継接して所定
深度までロッドを挿入する。挿入深度が深い場合には所
定間隔を置いてリング翼４を付設した継接ロッド11を加
え、ロッド１の駆動安定化をはかる。When the rod 1 is inserted to the length of the first connecting rod 11, the rods 11 are successively connected thereon and the rod is inserted to a predetermined depth. When the insertion depth is deep, the connecting rod 11 provided with the ring wing 4 is added at predetermined intervals to stabilize the driving of the rod 1.
【００２３】この段階で揚土される排出土壌は、地盤硬
化材注入時のスライムと異なり硬化材を含んでいないか
ら一般産業廃棄物として通常処理することが可能であ
る。The discharged soil discharged at this stage does not contain a hardening material unlike the slime obtained when the ground hardening material is injected, so that it can be usually treated as general industrial waste.
【００２４】所定深度に達したところで、張出噴射ノズ
ル21、22から硬化材を硬化材層の造成計画に対応する噴
射圧によって噴射し、ロッド側壁の複数噴出孔12、12・
・からエアーを噴射し、或いはエアーを噴射しないで、
注入ロッドを回動しつつ抜去方向に移動する。When the predetermined depth is reached, the hardening material is injected from the overhanging injection nozzles 21 and 22 by the injection pressure corresponding to the plan for forming the hardened material layer, and the plurality of injection holes 12, 12.
・ Inject air from or without air
The injection rod is moved in the withdrawal direction while rotating.
【００２５】硬化材注入時にエアーを噴射しない場合に
は、張出噴射ノズル21、22から噴射される硬化材は、ロ
ッドの回動と噴射圧に応じて周辺土壌を穿孔攪拌し所定
径の地盤硬化材注入層Ｚを造成していくが、コア空隙部
Ｙが存在するので、通常発生する余剰スライムのほとん
どがコア空隙部Ｙに充填吸収され、或いはパーツオーガ
ー14によって適量が揚土排出されてその発生は最小限度
に抑制される。If the air is not injected when the hardening material is injected, the hardening material injected from the overhanging injection nozzles 21 and 22 pierces and agitates the surrounding soil according to the rotation of the rod and the injection pressure, and the ground having a predetermined diameter is formed. The hardened material injection layer Z is formed, but since the core void Y exists, most of the normally generated excess slime is filled and absorbed in the core void Y, or an appropriate amount is discharged and discharged by the parts auger 14. Its occurrence is minimized.
【００２６】また、硬化材注入時にロッド側壁の複数噴
出孔12、12・・からエアーを噴射する場合には、リング
翼４が沈降時に周辺土壌とロッド挿入孔を区画し、噴出
孔12、12・・より下部に位置する張出噴射ノズル21、22
から噴射される硬化材は、排出土壌より比重が重くコア
空隙部Ｙの下層部に沈下し、比重の軽い排出土壌を押し
上げて上部に位置する噴出孔12、12・・から噴出される
エアーが上層部の余剰土壌のみをリフト効果によって排
出し、地内圧を調整するので噴射硬化材がロッド挿入孔
壁の脆弱部から余計な部位に浸出されることがない。When air is injected from the plurality of ejection holes 12, 12,... Of the rod side wall at the time of injection of the hardening material, the ring blade 4 partitions the surrounding soil and the rod insertion hole at the time of sinking, and the ejection holes 12, 12,. ..Overhanging injection nozzles 21 and 22 located below
The hardened material ejected from the soil has a higher specific gravity than the discharged soil, sinks in the lower part of the core gap Y, pushes up the discharged soil having a lower specific gravity, and the air ejected from the orifices 12, 12,. Only the surplus soil in the upper part is discharged by the lift effect and the ground pressure is adjusted, so that the spray hardening material does not leach out to an unnecessary part from the weak portion of the wall of the rod insertion hole.
【００２７】本発明は以上のようにして、従来、排出さ
れていた注入余剰物をコア空隙部Ｙに充填吸収ながら、
ロッド１を抜去方向に後退させつつ継接ロッド11を順次
取り除いて、対象地盤中に硬化材を注入して円筒状に地
盤硬化材注入層Ｚを造成し、必要に応じてこれを並列す
るものである。As described above, the present invention fills and absorbs the excess injection material that has been conventionally discharged into the core space Y,
The connecting rod 11 is sequentially removed while the rod 1 is retracted in the withdrawal direction, and a hardening material is injected into the target ground to form a ground hardening material injection layer Z in a cylindrical shape, and if necessary, these layers are arranged in parallel. It is.
【００２８】本発明は以上のように構成したので、従来
に比して比較的低い注入圧で高深度の地層にも確実な範
囲の硬化材注入層を造成でき、しかも、公害の元凶とな
るスライムの発生を抑制できる効果がある。Since the present invention is configured as described above, it is possible to form a hardened material injection layer in a certain range even in a deep formation with a relatively low injection pressure as compared with the prior art, and it is a cause of pollution. There is an effect that generation of slime can be suppressed.
【００２９】[0029]
【図１】本発明の実施例を示すもので、施工状況を示す
全体斜視図FIG. 1 shows an embodiment of the present invention, and is an overall perspective view showing a construction state.
【図２】同じく、本発明の注入ロッドの実施例を示すも
ので、注入ロッド先端部における硬化材注入構造を示す
注入部の拡大縦断側面図FIG. 2 is an enlarged longitudinal sectional side view of an injection portion showing an embodiment of the injection rod of the present invention, showing a hardening material injection structure at the tip of the injection rod.
【図３】同じく、継接ロッドに装着されるパーツオーガ
ーの斜視図FIG. 3 is a perspective view of a part auger attached to the connecting rod.
【図４】同じく、重合噴射ノズルに構成した張出噴射ノ
ズル噴射口の拡大斜視図FIG. 4 is an enlarged perspective view of an overhanging injection nozzle formed in a polymerization injection nozzle.
１ 注入ロッド 11 継接ロッド 12 継接ロッドのエア噴出孔 13 継接ロッドのパーツオーガー装着部 14 パーツオーガー ２ モニター部 21 モニター部の張出噴射ノズル 22 モニター部の張出噴射ノズル 23 張出噴射ノズルの核ノズル 24 張出噴射ノズルの囲周ノズル ３ スクリュウオーガー部 31 スクリュウオーガー ４ リング翼 41 リング翼支持腕 ５ スイベル 51 切削材料供給部に連絡するホース 52 充填材料供給部に連絡するホース ６ 注入ロッド作動機構 61 注入ロッド操作駆動機構 Ｘ 対象地盤 Ｙ コア空隙部 Ｚ 地盤硬化材注入層 DESCRIPTION OF SYMBOLS 1 Injection rod 11 Connecting rod 12 Air ejecting hole of connecting rod 13 Part auger mounting part of connecting rod 14 Parts auger 2 Monitor part 21 Overhanging injection nozzle of monitor part 22 Overhanging injection nozzle of monitor part 23 Overhanging injection Nozzle core nozzle 24 Surrounding nozzle of overhanging injection nozzle 3 Screw auger part 31 Screw auger 4 Ring wing 41 Ring wing support arm 5 Swivel 51 Hose connecting to cutting material supply part 52 Hose connecting to filling material supply part 6 Injection Rod operating mechanism 61 Injection rod operation drive mechanism X Target ground Y Core void Z Ground hardening material injection layer
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平７−268858（ＪＰ，Ａ) 特開 平８−144265（ＪＰ，Ａ) 特開 平３−122316（ＪＰ，Ａ) 特開 昭51−81412（ＪＰ，Ａ) 特開 平11−81295（ＪＰ，Ａ) 特開 昭62−174412（ＪＰ，Ａ) 特開 平９−88057（ＪＰ，Ａ) 特開 平11−117287（ＪＰ，Ａ) 特開 平６−49834（ＪＰ，Ａ) 特開 昭57−104714（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) E02D 3/12 101 E02D 5/46 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-7-268858 (JP, A) JP-A-8-144265 (JP, A) JP-A-3-122316 (JP, A) JP-A-51- 81412 (JP, A) JP-A-11-81295 (JP, A) JP-A-62-174412 (JP, A) JP-A-9-88057 (JP, A) JP-A-11-117287 (JP, A) JP-A-6-49834 (JP, A) JP-A-57-104714 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) E02D 3/12 101 E02D 5/46
Claims (3)
部に、スクリュウオーガー部と、これを囲繞してオーガ
ー部外周に支持されるリング翼を備え、その上部のロッ
ド側壁に所定間隔を置いて複数の噴射孔と着脱可能なパ
ーツオーガーの装着部を設けた注入ロッドを、必要に応
じてパーツオーガーを補充装着して対象地盤に回動しつ
つ下降させて挿入し、所定深度に達したところで、張出
噴射ノズルから硬化材を高圧噴射しながら、注入ロッド
を回動しつつ抜去方向に移動してオーガーの回動とリン
グ翼の支持切削によって構成されるコア空隙部と硬化材
噴流による切削攪拌部に硬化材を注入することを特徴と
する地盤硬化材張出注入工法1. A screw auger section and a ring wing that surrounds the screw auger section and are supported on the outer periphery of the auger section at an upper portion of a monitor section having an overhanging injection nozzle. The injection rod provided with a plurality of injection holes and a detachable part auger mounting part was refilled and mounted as necessary on the part auger and lowered and inserted into the target ground while rotating, reaching the predetermined depth By the way, while the hardening material is injected from the overhanging injection nozzle at a high pressure, the injection rod is rotated and moved in the withdrawal direction, and the core gap formed by the rotation of the auger and the support cutting of the ring wings and the hardening material jet. Soil hardening material overhang injection method characterized by injecting hardening material into the cutting stirrer
ズルから水、側壁の複数噴射孔からエアーを噴出するよ
うにし、ロッドの抜去方向への移動時には張出噴射ノズ
ルから硬化材、側壁の複数噴射孔からエアーを噴射する
ようにした請求項１記載の地盤硬化材張出注入工法2. When the rod descends, water and air are ejected from the overhanging injection nozzle of the monitor section and a plurality of injection holes on the side wall. 2. A method for overhanging and injection of a ground hardening material according to claim 1, wherein air is injected from an injection hole.
から成る重合噴射ノズルに構成し、ロッドの抜去方向へ
の移動時に張出噴射ノズルの核ノズルから硬化材、囲周
ノズルからからエアーを噴射するようにした請求項１又
は請求項２記載の地盤硬化材張出注入工法3. The overhanging injection nozzle is configured as a polymerization injection nozzle including a core nozzle and a surrounding nozzle, and when the rod moves in the withdrawal direction, the hardening material from the core nozzle of the overhanging nozzle and air from the surrounding nozzle. 3. The method for overhanging and injection of a ground hardening material according to claim 1 or 2, wherein
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|---|---|---|---|
| JP25848299A JP3258989B2 (en) | 1999-09-13 | 1999-09-13 | Ground hardening material overhang injection method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25848299A JP3258989B2 (en) | 1999-09-13 | 1999-09-13 | Ground hardening material overhang injection method |
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|---|---|
| JP2001081769A JP2001081769A (en) | 2001-03-27 |
| JP3258989B2 true JP3258989B2 (en) | 2002-02-18 |
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Cited By (1)
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|---|---|---|---|---|
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1999
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108708372A (en) * | 2018-06-01 | 2018-10-26 | 内蒙古自治区水利水电勘测设计院 | One kind having pressure complex cement aeolian accumulation mortar mixing pile pile-formation process |
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| JP2001081769A (en) | 2001-03-27 |
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