JPS5814895B2 - Construction method for underground columnar solid bodies - Google Patents
Construction method for underground columnar solid bodiesInfo
- Publication number
- JPS5814895B2 JPS5814895B2 JP54019645A JP1964579A JPS5814895B2 JP S5814895 B2 JPS5814895 B2 JP S5814895B2 JP 54019645 A JP54019645 A JP 54019645A JP 1964579 A JP1964579 A JP 1964579A JP S5814895 B2 JPS5814895 B2 JP S5814895B2
- Authority
- JP
- Japan
- Prior art keywords
- injection
- solidifying agent
- injection device
- nozzle
- underground
- 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
Links
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Description
【発明の詳細な説明】
本発明は地中にセメントミルクや薬液等の固結剤を注入
して柱状の固結体を築造する地中固結体の固結剤注入装
置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for injecting a solidifying agent into a solidified body underground, which injects a solidifying agent such as cement milk or a chemical solution into the ground to construct a columnar solidified body.
地中に穿孔したガイド孔内にパイプを挿入し、そのパイ
プから固結剤を土中に注入しながらパイプを引き上げて
地中に固結体を築造する技術は、いわゆるコラムジェッ
ト工法として止水とか基礎地盤の改良に利用されて所期
の成果を収めている。The technique of inserting a pipe into a guide hole drilled in the ground and injecting a solidifying agent into the soil while pulling the pipe up to build a solid body underground is the so-called column jet method. It has been used to improve the foundation ground and has achieved the desired results.
しかしながら従来の技術において、例えば第１図に示す
ような既設の基礎１の下方に固結体２を築造するには、
基礎１の両側にガイドホール３を２本穿孔し、このガイ
ドホール３にパイプ状の固結剤注入装置を挿入し、装置
を回転させなから固結剤の注入を行い、固結体２を築造
していた。However, in the conventional technology, in order to construct a solid body 2 under an existing foundation 1 as shown in FIG.
Two guide holes 3 are drilled on both sides of the foundation 1, a pipe-shaped solidifying agent injection device is inserted into the guide holes 3, and the solidifying agent is injected without rotating the device to form the solid body 2. It was being built.
したがってこのような従来の技術においては、（１）セ
メントミルクなどの注入材料を不要の個所にまで注入す
るので不経済である。Therefore, in such conventional techniques, (1) injection material such as cement milk is injected into unnecessary locations, which is uneconomical;
（２）固結剤注入装置を回転させながら引揚げるので、
施工能率が悪い。(2) Since the solidifying agent injection device is lifted while rotating,
Construction efficiency is poor.
などといった欠点がある。There are drawbacks such as.
そのために、出来上った固結体に不均質あるいは欠損部
が発生する場合があり、さらに施工能率が低いためにコ
ストが高くなる傾向が見られる。As a result, non-uniformity or defects may occur in the finished solid body, and furthermore, there is a tendency for costs to increase due to low construction efficiency.
したがって本発明の目的は、注入材料を不要の個所にま
で注入することなく、また固結剤注入装置を回転させる
ことなく断面か扇形もしくわ円形の注状固結体を築造す
ることのできる地中柱状固結体の固結剤注入装置を提供
するにある。Therefore, it is an object of the present invention to make it possible to construct a poured solid body having a fan-shaped or cross-shaped cross section without injecting the injection material into unnecessary areas or rotating the solidifying agent injection device. The present invention provides a solidifying agent injection device for medium columnar solidified bodies.
本発明によれば固結剤の注入装置のノズルは噴射溝を備
え、その噴射溝のほぼ中央に形成した噴射孔は上下方向
の長さに対して左右方向の長さが長い長円形の断面を有
し、その噴射孔の先端は水平面内で一定角度で広がって
いる。According to the present invention, the nozzle of the solidifying agent injection device is provided with an injection groove, and the injection hole formed approximately in the center of the injection groove has an oval cross section whose length in the horizontal direction is longer than the length in the vertical direction. The tip of the injection hole is spread out at a constant angle in the horizontal plane.
したがって本発明の実施に際してノズルの形状、その噴
射孔の広がり角度および組合せを変えることによって、
固結剤の広がりを調整でき任意形状の扇形を形成するこ
とができる。Therefore, when implementing the present invention, by changing the shape of the nozzle, the spread angle of its injection holes, and the combination,
The spread of the solidifying agent can be adjusted and a sector of arbitrary shape can be formed.
したがって本発明によれば、 （１）注入材料を所定の場所に有効に利用できる。According to the invention, therefore: (1) The injection material can be effectively used at a predetermined location.
（２）施工能率が高い。(2) High construction efficiency.
（３）施工装置、機械のうち、ロンドの回転用の駆動装
置および地盤のかきまわし用の回転翼が不要となり、全
般に小型、単純化できる。(3) Of the construction equipment and machines, a driving device for rotating the rondo and a rotary blade for stirring the ground are not required, and the construction can be made smaller and simpler in general.
等の効果を有するものである。It has the following effects.
以下本発明の実施例を第２図以下の図面により説明する
。Embodiments of the present invention will be described below with reference to FIG. 2 and the following drawings.
本発明においても、第３図ないし第５図に示すように先
ず穿孔装置１０を用いて地盤にガイドホール４を穿孔し
、次にクレーン１３で吊したパイプ１１の先端に固結剤
注入装置１２をとりつけ、この装置１２をガイドホール
３の孔底に設置する点は従来例と同様である。Also in the present invention, as shown in FIGS. 3 to 5, a guide hole 4 is first drilled in the ground using a drilling device 10, and then a solidifying agent injection device 12 is inserted into the tip of a pipe 11 suspended by a crane 13. This device 12 is installed at the bottom of the guide hole 3 in the same manner as in the conventional example.
しかしながら、本発明を実施した固結剤注入装置には後
述する扇形噴射型ノズルが取付けられており、このノズ
ルの向きは地盤改良の必要な方向に設定される。However, the solidifying agent injection device embodying the present invention is equipped with a fan-shaped injection nozzle, which will be described later, and the orientation of this nozzle is set in the direction in which ground improvement is required.
この状態から、ホース１４を介して水、空気、固結剤を
注入装置１２に送り、固結剤を地盤中に扇形に注入しな
がら、クレーン１３によって注入装置１２を徐々に引き
揚げながら、所定断面形状をした固結体を築造するので
ある。From this state, water, air, and a consolidation agent are sent to the injection device 12 via the hose 14, and while injecting the consolidation agent into the ground in a fan shape, the injection device 12 is gradually lifted up by the crane 13, and a predetermined cross section is It builds a shaped solid body.
次に本発明に実施する扇形噴射型ノズルの構成を第６図
で説明する。Next, the configuration of the fan-shaped injection nozzle implemented in the present invention will be explained with reference to FIG.
この扇形噴射型ノズル２０は、内部に通路２１が形成し
てあり、その先端部に噴射溝Ａが設けてある。This fan-shaped injection nozzle 20 has a passage 21 formed therein, and an injection groove A provided at its tip.
この噴射溝Ａの中央の噴射孔Ｂは、上下方向の長さｄ２
、左右方向の長さｄ１の長円形の断面形状を有しており
、溝ＡのＸ−Ｘ線での断面形状は第６図ハに示すように
、水平面内で角度θで広がっている。The injection hole B at the center of this injection groove A has a length d2 in the vertical direction.
, has an oval cross-sectional shape with a length d1 in the left-right direction, and the cross-sectional shape of the groove A along line X--X extends at an angle θ in the horizontal plane, as shown in FIG. 6C.
本発明に実施するノズルの基本形状は以上のようなもの
であって、寸法ｄ１，ｄ２や角度θを変えることによっ
て後述するように種々の扇形噴射を得ることができる。The basic shape of the nozzle used in the present invention is as described above, and by changing the dimensions d1 and d2 and the angle θ, various fan-shaped jets can be obtained as described later.
そしてこのノズルを適用する固結剤注入装置は、出来上
り固結体の大小に応じて３種類のものが用いられる。There are three types of solidifying agent injection devices to which this nozzle is applied, depending on the size of the finished solidified body.
第７図に示すものは、単管形式の注入装置１２ａであっ
て、ノズル２０ａからはセメントミルクや薬液等の固結
剤が直接に噴射される。The one shown in FIG. 7 is a single-tube type injection device 12a, and a solidifying agent such as cement milk or a chemical solution is directly injected from a nozzle 20a.
第８図に示すものは、２重管形式の注入装置１２ｂであ
って、ノズル２０ｂは２重構造となっていて、内側の管
からは固結剤が、外側の管からは空気噴流が同時に噴射
される。The one shown in FIG. 8 is a double-tube type injection device 12b, and the nozzle 20b has a double structure, and the caking agent is supplied from the inner pipe and the air jet is delivered from the outer pipe at the same time. Injected.
第９図に示すものは、３重管形式の注入装置１２ｃであ
って、ノズル２０ｃからは固結剤が、ノズル２２ｃは２
重構造となっていて、内側の管からは高速水噴流が、外
側の管からは空気噴流がそれぞれ同時に噴射される。The one shown in FIG. 9 is a triple tube type injection device 12c.
It has a layered structure, with high-speed water jets being ejected from the inner tube and air jets being ejected from the outer tube at the same time.
本発明を実施した装置の使用に際して第１０図イ〜ホに
示すように種々の態様が考えられる。When using the apparatus embodying the present invention, various modes can be considered as shown in FIG. 10A to 10E.
すなわち、ノズルの先端の寸法、ｄ１，ｄ２，θを種々
に変えた複数のノズルを準備しておき、第１０図イ〜ハ
に示すように噴射する扇形の開扇角度をそれぞれ３０度
、６０度、９０度などに設定することができる。That is, a plurality of nozzles with various nozzle tip dimensions d1, d2, and θ are prepared, and the opening angle of the fan-shaped jet is set to 30 degrees and 60 degrees, respectively, as shown in Figure 10 A to C. It can be set to 90 degrees, etc.
そしてこれらのノズルを複数個組合せることによって二
に示すように１８０度の角度を得たり、ホに示すように
３６０度全周にわたって固結剤を噴射することもできる
。By combining a plurality of these nozzles, it is possible to obtain an angle of 180 degrees as shown in 2 or to inject the solidifying agent over the entire 360 degrees as shown in e.
したがって従来技術の如く、装置を回転させる必要がな
い０
本発明によれば以上のように、固結剤注入装置を回転さ
せる必要がないので装置は簡素、小型軽量化を計ること
ができ、又施工能率を高めることができる。Therefore, unlike the prior art, there is no need to rotate the device. According to the present invention, as described above, there is no need to rotate the solidifying agent injection device, so the device can be made simple, compact, and lightweight. Construction efficiency can be increased.
更に施工個所に応じてノズルを取り換えて、最適な断面
形状をした固結体を形成することができ、必要な範囲の
みに注入するので、固結剤を経済的に利用できる等の効
果を有するものである。Furthermore, the nozzle can be replaced depending on the construction site to form a solidified body with the optimal cross-sectional shape, and since it is injected only to the necessary area, it has the effect of making it possible to use the solidifying agent economically. It is something.
第１図は本発明を適用する固結体の築造形態を示す側面
図、第２図は従来の築造方法を示す平面図、第３図はガ
イドホールの穿孔工程を示す側面図、第４図は注入装置
の設置工程を示す側面図、第５図は固結体の築造工程を
示す側面図、第６図イ、口、ハは本発明に使用するノズ
ルの説明図、第７図は単管式の注入装置の側面図、第８
図は２重管式の注入装置の側面図、第９図は３重管式の
注入装置の側面図、第１０図イ、口、ノ＼、二およびホ
は噴射方法を示す平面図である。
１・・・・・・基礎、２・・・・・・柱状固結体、３・
・・・・・ガイドホール、１１・・・・・・パイプ、１
２・・・・・・固結剤注入装置、１３・・・・・・クレ
ーン、１４・・・・・・ホース、２０・・・・・・ノズ
ル。Fig. 1 is a side view showing the construction form of a solid body to which the present invention is applied, Fig. 2 is a plan view showing the conventional construction method, Fig. 3 is a side view showing the process of drilling guide holes, and Fig. 4 5 is a side view showing the installation process of the injection device, FIG. 5 is a side view showing the construction process of the solid body, FIG. Side view of tubular injection device, No. 8
The figure is a side view of a double-tube type injection device, Figure 9 is a side view of a triple-tube type injection device, and Figure 10 is a plan view showing the injection method. . 1...Foundation, 2...Column-shaped solid body, 3.
...Guide hole, 11 ...Pipe, 1
2... Solidifying agent injection device, 13... Crane, 14... Hose, 20... Nozzle.
Claims (1)
端に有するパイプを挿入して、ノズルから固結剤、高圧
噴射液、空気等を噴射して地中に柱状の固結体を築造す
るための固結剤注入装置において、固結剤注入装置のノ
ズルは噴射溝を備え、その噴射溝のほぼ中央に形成した
噴射孔は上下方向の長さに対して左右方向の長さが長い
長円形の断面形状を有し、この噴射孔の先端は水平面内
で一定角度で広がっていることを特徴とする地中柱状固
結体の固結剤注入装置。1. A pipe with a solidifying agent injection device at the tip is inserted into a guide hole drilled underground, and solidifying agent, high-pressure injection liquid, air, etc. are injected from the nozzle to form a columnar solidified body in the ground. In a hardening agent injection device for building construction, the nozzle of the hardening agent injection device is equipped with an injection groove, and the injection hole formed approximately in the center of the injection groove has a length in the horizontal direction relative to the length in the vertical direction. A device for injecting a solidifying agent into an underground columnar solidified body, which has a long oval cross-sectional shape, and the tip of the injection hole is spread out at a constant angle in a horizontal plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54019645A JPS5814895B2 (en) | 1979-02-23 | 1979-02-23 | Construction method for underground columnar solid bodies |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54019645A JPS5814895B2 (en) | 1979-02-23 | 1979-02-23 | Construction method for underground columnar solid bodies |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55114705A JPS55114705A (en) | 1980-09-04 |
| JPS5814895B2 true JPS5814895B2 (en) | 1983-03-23 |
Family
ID=12004964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP54019645A Expired JPS5814895B2 (en) | 1979-02-23 | 1979-02-23 | Construction method for underground columnar solid bodies |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5814895B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2702337B2 (en) * | 1991-10-24 | 1998-01-21 | 株式会社 エヌ、アイ、テイ | Construction method of hardened material injection structure |
-
1979
- 1979-02-23 JP JP54019645A patent/JPS5814895B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55114705A (en) | 1980-09-04 |
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