JPH0786223B2 - Construction method of hollow hardened layer - Google Patents
Construction method of hollow hardened layerInfo
- Publication number
- JPH0786223B2 JPH0786223B2 JP1241757A JP24175789A JPH0786223B2 JP H0786223 B2 JPH0786223 B2 JP H0786223B2 JP 1241757 A JP1241757 A JP 1241757A JP 24175789 A JP24175789 A JP 24175789A JP H0786223 B2 JPH0786223 B2 JP H0786223B2
- Authority
- JP
- Japan
- Prior art keywords
- injection
- nozzle
- layer
- hardened
- hardening material
- 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 - Fee Related
Links
- 238000010276 construction Methods 0.000 title claims description 3
- 238000002347 injection Methods 0.000 claims description 51
- 239000007924 injection Substances 0.000 claims description 51
- 239000000463 material Substances 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000013505 freshwater Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 239000004576 sand Substances 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims 1
- 239000004848 polyfunctional curative Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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〕 本発明は地中構造物の支保、覆工、軟弱地盤の安定、止
水、土留などに幅広く利用される地盤硬化層の造成工法
に関するもので、特に円柱状硬化層のコア部分を中空に
構成し、そのクリアランス部分を積極的に利用出来るよ
うにした中空硬化層の造成に関するものである。The present invention relates to a method for constructing a hardened ground layer which is widely used for supporting and lining underground structures, stabilizing soft ground, stopping water, retaining soil, and the like. In particular, the present invention relates to the formation of a hollow hardened layer in which the core portion of the cylindrical hardened layer is hollow and the clearance portion can be positively utilized.
従来、硬化材の注入による硬化層の造成は、先端側壁の
噴射ノズルから硬化材を高圧噴射しながら注入管を回転
上昇させ、円柱状硬化材注入層を造成する高圧注入工法
を始め、圧密充填、置換充填、低圧注入など様々な工法
が行われてきたが、いずれもこれを硬化させるだけで終
わっていた。Conventionally, the formation of a hardened layer by injecting a hardener is started by a high-pressure injection method in which the injection pipe is rotated and raised while the high-pressure injection of the hardener is injected from the injection nozzle on the tip side wall to form a columnar hardened material injecting layer. , Various methods such as substitution filling and low pressure injection have been performed, but all of them were done only by curing it.
従来の地盤硬化層は全くクリアランスのない硬化層であ
るから、唯地層を固結強化すれば事足りる場合はその目
的を達するが、コア部分に更に工作を加える必要のある
場合には中空硬化層が造成されれば便利である。特に最
近では直径６メートルに及ぶ大口径の硬化層が一挙に造
成出来るまでになっているので、コア部分を中空にすれ
ば中空部がそのまま作業スペースとなり、スペース覆工
壁が一挙に造成できる。しかしながら、一旦固結された
硬化層のコア部分は固くて掘削が困難であるし、固結前
の硬化層では地盤が沈降して更に作業が困難である。Since the conventional hardened layer is a hardened layer with no clearance at all, the purpose is achieved when it is sufficient to solidify and strengthen the unhardened layer, but the hollow hardened layer is used when it is necessary to further work the core part. It will be convenient if constructed. In particular, recently, a large-diameter hardened layer having a diameter of 6 meters can be formed all at once. Therefore, if the core portion is hollow, the hollow portion directly serves as a working space, and the space lining wall can be formed all at once. However, the core portion of the hardened layer once hardened is hard and difficult to excavate, and the ground is settled in the hardened layer before solidification, and the work is further difficult.
本発明は上記の問題点を解決するために、地中に硬化材
注入層を造成し、その注入硬化材の硬化前に同硬化材注
入層の所要位置に、中核を構成する核ノズルとこれを取
り囲む環状ノズルとから成る噴射ノズルを先端側壁に設
けた噴射管を挿入し、核ノズルから清水、環状ノズルか
らエアを同時に高圧噴射しつつ、噴射管を回転しながら
後退させることにより、注入層中心部の硬化材混入土砂
を崩壊し、清水と撹拌混合してリフト排出するようにし
たものである。In order to solve the above problems, the present invention forms a hardening material injection layer in the ground, and at the required position of the hardening material injection layer before hardening of the injection hardening material, a nuclear nozzle constituting a core and this. An injection tube having an injection nozzle consisting of an annular nozzle surrounding the end wall is inserted, and high-pressure injection of fresh water from the nuclear nozzle and air from the annular nozzle at the same time, while the injection tube is rotated and retracted, the injection layer It is designed to disintegrate the hardened material mixed sand in the center, mix it with fresh water by stirring, and discharge it by lift.
噴射ノズルから噴射される清水は噴射管の周辺土壌を掘
削すると同時にこれを余剰水と攪拌混合する。エアは噴
射清水を抱合して飛距離を延長する一方、その上昇力に
よってエアリフト効果を生じさせ、余剰水と混合された
排土をリフト排出する。The fresh water jetted from the jet nozzle excavates the soil around the jet pipe and at the same time stirs and mixes it with the surplus water. The air binds the jetted clean water to extend the flight distance, and the rising force of the air causes an air lift effect to lift and discharge the soil mixed with the excess water.
以下図面に従って本発明の実施例を説明する。 Embodiments of the present invention will be described below with reference to the drawings.
１は噴射管で、回転上下動機構２に支持され先端側壁に
は核ノズル32とこれを取り囲む環状ノズル33とから成る
噴射ノズル３、先端部には掘削刃31が設けられている。
核ノズル32と環状ノズル33はそれぞれ別個の流路を通し
て開口され、スイベル４を通してそれぞれ別の噴射素材
が供給出来るようになっている。Reference numeral 1 denotes an injection pipe, which is supported by the rotary up-and-down moving mechanism 2 and is provided with an injection nozzle 3 having a core nozzle 32 and an annular nozzle 33 surrounding the core nozzle 32 at the tip side wall, and an excavating blade 31 at the tip portion.
The nuclear nozzle 32 and the annular nozzle 33 are opened through separate flow paths so that different jet materials can be supplied through the swivel 4.
更に噴射ノズル３は上部3aと下部3bの２個所に間隔を50
cm程度置いて設けられている。このように構成された噴
射管を適宜の潤滑水を噴出させながら高速回転して対象
地盤の所定深度まで推進下降させる。所定深度に達した
ところで、ノズル3aからエアＡで包囲した清水Ｂ、ノズ
ル3bからエアＣで包囲した硬化材Ｄを、それぞれ700kg/
cm2の高圧力で噴射しつつ噴射管を回転上昇させて硬化
材注入層Ｘを造成する。このようにして造成された硬化
材注入層はノズル3aからの洗滌攪拌噴射とノズル3bから
の硬化材充填攪拌噴射の相乗効果によって極めて大径の
円柱形のものが得られる。なお硬化材注入層Ｘは、高圧
注入、低圧注入、置換充填、圧密充填など様々な方法に
よって硬化材が注入され得るものであり、また方向も垂
直方向に地盤硬化層を造成する場合、垂平方向に地盤硬
化層を造成する場合でも硬化材が注入され固結される以
前のものであれば、いずれも本発明を適用することが可
能である。Further, the spray nozzle 3 has a space of 50 at the upper portion 3a and the lower portion 3b.
It is placed about cm. The jet pipe configured as described above is rotated at high speed while jetting appropriate lubricating water to propel and descend to a predetermined depth of the target ground. When reaching a predetermined depth, 700 kg of fresh water B surrounded by air A from the nozzle 3a and 700 kg / kg of hardened material D surrounded by air C from the nozzle 3b, respectively.
While injecting at a high pressure of cm 2, the injection pipe is rotated and raised to form the hardening material injection layer X. The hardening material injection layer formed in this way can be obtained as a cylinder having an extremely large diameter due to the synergistic effect of the washing and stirring injection from the nozzle 3a and the hardening material filling stirring and injection from the nozzle 3b. The hardening material injection layer X can be injected with a hardening material by various methods such as high-pressure injection, low-pressure injection, displacement filling, and compaction filling. In addition, when the ground hardening layer is formed in the vertical direction, Even when the ground hardened layer is formed in the opposite direction, the present invention can be applied to any hardened material before being hardened and solidified.
そこで、注入硬化材が固結する以前に更に硬化材注入層
Ｘのコア部分に噴射管１を再度挿入する。注入層Ｘのコ
ア部分は硬化材の固結前で軟弱でなるから、挿入手段は
適宜選択することができる。噴射管が注入層Ｘの底部も
しくは所定位置に達したところで、噴射ノズル３からエ
アで包囲した清水を400kg/cm2の高圧力で噴射しつつ緩
回転上昇すると高圧水が注入層のコア部分を噴射圧の差
に応じたサークル部分ｙを残して掘削崩壊せしめると共
にスライムを噴射エネルギーを失った余剰水と混合攪拌
し、これが噴射エアの上昇力によって生ずるエアリフト
効果によってパッキングプール５に上昇排出され、更に
ポンプ51によって濾過機６に吸引圧送される。Therefore, the injection pipe 1 is inserted again into the core portion of the hardening material injection layer X before the injection hardening material is solidified. Since the core portion of the injection layer X becomes soft before the hardening material is hardened, the insertion means can be appropriately selected. When the injection pipe reaches the bottom of the injection layer X or at a predetermined position, high-pressure water sprays the core portion of the injection layer when the fresh water surrounded by air is injected from the injection nozzle 3 at a high pressure of 400 kg / cm 2 and slowly rotated. While excavating and collapsing while leaving a circle portion y corresponding to the difference in injection pressure, the slime is mixed and agitated with excess water that has lost injection energy, and this is ascended and discharged to the packing pool 5 by the air lift effect generated by the ascending force of the injection air, Further, it is pumped to the filter 6 by the pump 51.
濾過機６で濾過されたスライム混合水は、再び噴射水と
して噴射管に供給される。なお噴射ノズル３は単独でも
複数でもよい。硬化材注入層Ｘが水平方向に造成された
場合、噴射エアの上昇力は噴射管の挿入クリアランスか
ら回流される噴出力になるが、排出力が不足する場合は
吸引ポンプによって補完する。また、場合によってはエ
アを噴射せず吸引ポンプのみによっても良い。The slime mixed water filtered by the filter 6 is again supplied to the injection pipe as injection water. The injection nozzle 3 may be single or plural. When the hardening material injection layer X is formed in the horizontal direction, the rising force of the blast air becomes the jet output that is diverted from the insertion clearance of the jet pipe, but when the discharge force is insufficient, it is supplemented by the suction pump. In some cases, air may not be ejected and only a suction pump may be used.
本発明は以上のように構成したので、硬化材注入層のコ
ア部分を極めてスムーズに掘削排除することができ、中
空硬化層を迅速かつ簡易に造成することができる。Since the present invention is configured as described above, the core portion of the hardener injection layer can be excavated and removed extremely smoothly, and the hollow hardened layer can be quickly and easily formed.
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図は噴射ノズルの一例を示す噴射
管先端部の要部拡大図である。 １〜噴射管、２〜回転上下動機構、３〜噴射ノズル、3a
〜上部ノズル、3b〜下部ノズル、31〜掘削刃、32〜核ノ
ズル、33〜環状ノズル、４〜スイベル、５〜パッキング
プール、51〜吸引ポンプ、６〜濾過機、Ｘ〜硬化材注入
層、ｙ〜サークル部、ｚ〜クリアランス部FIG. 1 shows an embodiment of the present invention. FIG. 1 is an overall explanatory view showing a construction situation, and FIG. 2 is an enlarged view of a main portion of a tip end portion of an injection pipe showing an example of an injection nozzle. 1-injection pipe, 2-rotation vertical movement mechanism, 3-injection nozzle, 3a
-Upper nozzle, 3b-lower nozzle, 31-drilling blade, 32-nucleus nozzle, 33-annular nozzle, 4-swivel, 5-packing pool, 51-suction pump, 6-filter, X-hardener injection layer, y ~ Circle part, z ~ Clearance part
Claims (1)
化材の硬化前に同硬化材注入層の所要位置に、中核を構
成する核ノズルとこれを取り囲む環状ノズルとから成る
噴射ノズルを先端側壁に設けた噴射管を挿入し、核ノズ
ルから清水、環状ノズルからエアを同時に高圧噴射しつ
つ、噴射管を回転しながら後退させることにより、注入
層中心部の硬化材混入土砂を崩壊し、清水と撹拌混合し
てリフト排出することを特徴とする中空硬化層の造成工
法1. An injection method comprising forming a hardening material injection layer in the ground, and forming a core nozzle and an annular nozzle surrounding the core nozzle at required positions of the hardening material injection layer before hardening the injection hardening material. Insert the injection pipe with the nozzle on the tip side wall, and simultaneously inject high pressure water from the core nozzle and air from the annular nozzle, and by retracting while rotating the injection pipe, the hardened material mixed sand in the center of the injection layer can be removed. Hollow hardened layer construction method characterized by collapsing, stirring and mixing with fresh water, and discharging by lift
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1241757A JPH0786223B2 (en) | 1989-09-20 | 1989-09-20 | Construction method of hollow hardened layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1241757A JPH0786223B2 (en) | 1989-09-20 | 1989-09-20 | Construction method of hollow hardened layer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03107013A JPH03107013A (en) | 1991-05-07 |
| JPH0786223B2 true JPH0786223B2 (en) | 1995-09-20 |
Family
ID=17079079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1241757A Expired - Fee Related JPH0786223B2 (en) | 1989-09-20 | 1989-09-20 | Construction method of hollow hardened layer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0786223B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07252824A (en) * | 1994-03-10 | 1995-10-03 | Chem Grouting Co Ltd | Control method of finished pile diameter in consolidation pile construction by jet method. |
| JP6271240B2 (en) * | 2013-12-19 | 2018-01-31 | 東亜建設工業株式会社 | Ground improvement method and apparatus |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5924024A (en) * | 1982-07-29 | 1984-02-07 | Shin Nippon Techno Kk | Grout injection work |
| JPS61162624A (en) * | 1985-01-07 | 1986-07-23 | N I T:Kk | Underground stable supporting layer and forming method thereof |
| JPS61207712A (en) * | 1985-03-12 | 1986-09-16 | N I T:Kk | Method and device of improving ground |
| JPS6255316A (en) * | 1985-09-04 | 1987-03-11 | Yuji Kaneko | Method and apparatus for forming continuous horizontal columnar wall |
-
1989
- 1989-09-20 JP JP1241757A patent/JPH0786223B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03107013A (en) | 1991-05-07 |
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