JPH0485412A - Jet injection method - Google Patents
Jet injection methodInfo
- Publication number
- JPH0485412A JPH0485412A JP19851390A JP19851390A JPH0485412A JP H0485412 A JPH0485412 A JP H0485412A JP 19851390 A JP19851390 A JP 19851390A JP 19851390 A JP19851390 A JP 19851390A JP H0485412 A JPH0485412 A JP H0485412A
- Authority
- JP
- Japan
- Prior art keywords
- injection
- ground
- muddy water
- pipe
- water
- 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
- 238000002347 injection Methods 0.000 title claims abstract description 96
- 239000007924 injection Substances 0.000 title claims abstract description 96
- 238000000034 method Methods 0.000 title claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 118
- 239000004568 cement Substances 0.000 claims abstract description 32
- 239000008267 milk Substances 0.000 claims abstract description 25
- 210000004080 milk Anatomy 0.000 claims abstract description 25
- 235000013336 milk Nutrition 0.000 claims abstract description 25
- 230000000694 effects Effects 0.000 claims abstract description 9
- 239000006228 supernatant Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 3
- 238000007664 blowing Methods 0.000 abstract 2
- 239000004576 sand Substances 0.000 description 7
- 239000010802 sludge Substances 0.000 description 5
- 238000004062 sedimentation Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 101100121123 Caenorhabditis elegans gap-1 gene Proteins 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Earth Drilling (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野］
本発明は、地盤改良手段としての噴射注入工法の改良に
関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an improvement in an injection injection method as a soil improvement means.
近年、地盤改良手段として、薬液注入工法に代えて噴射
注入工法が広く普及している。In recent years, the injection method has been widely used as a ground improvement method instead of the chemical injection method.
この噴射注入工法は、超高圧のジェット水を利用して地
盤を切り崩し、地上に排出すると共にセメントやモルタ
ル等の固結材を充填する一種の置換注入工法である。This injection injection method is a type of displacement injection method that uses ultra-high pressure jet water to break down the ground, discharge it to the ground, and fill it with a cement, mortar, or other solidifying material.
このような噴射注入工法は、−従来、例えば特開昭６２
−１４１２２０号公報等に開示されるような噴射注入装
置がある。Such injection injection method is conventionally known as, for example, Japanese Patent Application Laid-Open No.
There is an injection injection device as disclosed in Japanese Patent No.-141220 and the like.
第９図はこの種の噴射Ｂ人装置を示し、図に於て、符号
１は地盤３に埋入される外７管、即ち、ケーシングで、
二〇ケーシングＩは噴射注入開始前に地盤改良される地
点まで引き抜かれている。FIG. 9 shows this type of injection device, and in the figure, reference numeral 1 is the outer 7 pipe, that is, the casing, which is buried in the ground 3.
20 Casing I is pulled out to the point where the ground is to be improved before injection begins.
そして、上記ケーシング１の内部には注入外管５が挿入
され、この圧入外管５は地盤３上に設置された昇降装置
によってケーシング１内で３６０度程度揺動可能とされ
ると共に、上下移動可能とされている。又、ケーシング
１と注入外管５とはシール材７でシーリングされている
。Then, an injection outer pipe 5 is inserted into the inside of the casing 1, and this press-fit outer pipe 5 is made to be able to swing about 360 degrees within the casing 1 by means of a lifting device installed on the ground 3, and can also be moved up and down. It is considered possible. Further, the casing 1 and the outer injection pipe 5 are sealed with a sealing material 7.
そして、上記注入外管５内には、高圧送水管９゜送気管
１）．排泥管１３．泥水注入管１５、そして、注入管１
７が収容されている。Inside the injection outer pipe 5, there is a high pressure water pipe 9°, an air pipe 1). Sludge drainage pipe 13. Mud water injection pipe 15 and injection pipe 1
7 is accommodated.
高圧送水管９は地盤３上に設置されたポンプ等に接続さ
れており、その先端にはジェット水Ｗを噴射するための
ジェット水噴射ノズル（以下「噴射ノズル」という）１
９が取り付けられ、この噴射ノズル１９は管軸に対して
９０度側方に高圧のジェ・７ト水Ｗを噴射するようにな
っている。The high-pressure water pipe 9 is connected to a pump or the like installed on the ground 3, and at its tip is a jet water injection nozzle (hereinafter referred to as "injection nozzle") 1 for injecting jet water W.
9 is attached, and this injection nozzle 19 is designed to inject high-pressure jet water W at 90 degrees to the side with respect to the tube axis.
又、上記送気管１）には地盤３上に設置されたコンプレ
ッサ等が接続されており、その下端には空気吹出口２１
が形成され、この空気吹出口２１は上記噴射ノズルＩ９
よりも下方に位置している。In addition, a compressor installed on the ground 3 is connected to the air pipe 1), and an air outlet 21 is connected to the lower end of the air pipe 1).
is formed, and this air outlet 21 is connected to the injection nozzle I9.
It is located below.
そして、噴射ノズル１９からのシェアド水Ｗによる切削
間隙−１上記空気吹出口２Ｉから圧縮空気か供給、充填
されて、地盤３中に空気領域Ａと泥水領域りとが区画形
成されている。Then, compressed air is supplied and filled from the air outlet 2I of the cutting gap-1 by the shared water W from the injection nozzle 19, and an air region A and a muddy water region are defined in the ground 3.
更に、上記排泥管１３は泥水領域りに開口する排泥口２
３と、空気領域Ａに開口する空気流入口２５とを有して
おり、空気流入口２５から排泥管１３へ流入する圧縮空
気によって所謂エアリフト効果が発生し、このエアリフ
ト効果によって泥水が排泥口２３から排泥管１３へ吸い
込まれ上方へ押し上げられるようになっている。そして
、この排泥管１３は、例えば地盤３上に設置された沈澱
層と混合層に接続されており、吸い上げられた泥水は沈
澱層で土砂を沈澱させ、適当な含水比等で調整されて再
び、泥水注入管１５により泥水領域りへ送水される構造
となっている。Furthermore, the mud draining pipe 13 has a mud draining port 2 that opens into the muddy water area.
3 and an air inlet 25 that opens to the air area A. Compressed air flowing from the air inlet 25 into the sludge draining pipe 13 causes a so-called air lift effect, and this air lift effect causes muddy water to drain into the sludge. The slurry is sucked into the drain pipe 13 through the port 23 and pushed upward. The slurry drain pipe 13 is connected to, for example, a sedimentation layer and a mixed layer installed on the ground 3, and the sucked up mud water settles earth and sand in the sedimentation layer and is adjusted to an appropriate water content ratio. Again, the structure is such that water is fed to the muddy area by the muddy water injection pipe 15.
一方、注入管１７の下端にはセメントミルク注入ノズル
（以下「注入ノズルＪという）２７が配置されており、
セメントミルクＳを、地盤３上に設置したポンプで上記
注入ノズル２７から泥水領域りの下方へ噴射１人して、
泥水領域りの下方にセメント添加泥領域Ｍを形成するよ
うになっている。そして、このセメント添加泥領域Ｍは
、昇降装置で注入外管５を徐々に上昇させることによっ
て上方へ順次拡大形成されていく。On the other hand, a cement milk injection nozzle (hereinafter referred to as "injection nozzle J") 27 is arranged at the lower end of the injection pipe 17.
One person injects cement milk S from the injection nozzle 27 downward into the muddy water area using a pump installed on the ground 3,
A cement-added mud region M is formed below the muddy water region. This cement-added mud region M is gradually expanded upward by gradually raising the injection outer pipe 5 using a lifting device.
このような噴射注入装置では、ジェット水Ｗの噴射は抵
抗の殆どない空気中の噴射となり、その射程は長くなり
地盤３の改良範囲を拡大することができると共に、泥水
の土質に対応してセメントの混合量１種類等を変更する
ことが可能である。With such an injection injection device, the jet water W is injected into the air with almost no resistance, and its range is longer, making it possible to expand the improvement range of the ground 3. It is possible to change the mixing amount of one kind, etc.
噴射されるジェット水Ｗで地盤３を切削し、これと同時
に１入ノズル２７からセメントミルクＳを噴射注入させ
ているため、注入されたセメントミルクＳが泥水領域り
中の土砂と混合して、その−部である大量のセメントミ
ルクＳと混合した泥水領域り中の泥水が、排泥管１３か
ら地上に排出されてしまっていた。The jet water W is injected to cut the ground 3, and at the same time, the cement milk S is injected from the one-fill nozzle 27, so the injected cement milk S mixes with the earth and sand in the muddy water area. The muddy water in the muddy water area mixed with a large amount of cement milk S, which is the other part, was discharged to the ground from the mud drain pipe 13.
従って、セメントミルクＳを含む排泥は産業排気物とし
て処理されなければならず、多くの費用を必要としてい
る。Therefore, the waste sludge containing cement milk S has to be treated as industrial exhaust gas, which requires a lot of cost.
本発明は斯かる実情に鑑み案出されたもので、上述の如
き噴射注入装置を用いて噴射注入工法を行なう際に、排
泥中にセメント等の固結材を含有することのない噴射注
入工法を提供することを目的とする。The present invention has been devised in view of the above-mentioned circumstances, and when performing the injection injection method using the injection injection device as described above, it is possible to perform injection injection without containing a solidification material such as cement in the waste mud. The purpose is to provide construction methods.
然し乍ら、上記噴射注入装置を用いて地盤３中にセメン
ト添加泥領域Ｍを形成する場合、従来では注入外管５を
上昇させ乍ら噴射ノズル１９から〔課題を解決するため
の手段］
斯かる目的を達成するため、本発明は、地盤中に埋入さ
れた管体からジェット水を噴射して地盤を切削すると共
に管体から常に圧縮空気を吐出することにより、上記地
盤中に空気領域と泥水領域とを形成し、上記空気領域の
圧縮空気を利用したエアリフト効果で泥水領域から管体
を通して泥水を吸い上げ、この吸い上げた泥水の上澄み
部を再び地盤中の泥水領域に戻し、セメントミルクを管
体を通して上記泥水領域の下方へ噴射注入し乍らセメン
ト添加泥領域を形成する噴射注入工法に於て、ジェット
水を噴射し管体を上昇させ乍ら地盤中に空気領域と泥水
領域を形成した後ジェット水の噴射を停止し、セメント
ミルクを泥水領域の下方へ噴射注入し乍ら管体を上昇さ
せセメント添加泥領域を形成し、その後、管体を降下さ
せ乍ら泥水領域から管体を通して泥水を吸い上げ、吸い
上げられた泥水中からセメント添加泥が検出された時に
管体の降下を中止して再び管体を上昇させ乍ら、ジェッ
ト水を噴射して地盤を切削すると共に管体から圧縮空気
を吐出して、地盤中に空気領域と泥水領域を形成してい
くものである。However, when forming the cement-added mud region M in the ground 3 using the above-mentioned injection injection device, conventionally, the outer injection pipe 5 is raised and the injection nozzle 19 is injected.[Means for Solving the Problem] Such a purpose In order to achieve this, the present invention injects jet water from a pipe body buried in the ground to cut the ground, and constantly discharges compressed air from the pipe body, thereby creating an air area and muddy water in the ground. The air lift effect using the compressed air in the air area sucks up the muddy water from the muddy area through the pipe body, and the supernatant part of this sucked muddy water is returned to the muddy water area in the ground, and the cement milk is transferred to the pipe body. In the injection injection method in which a cement-added mud area is formed by injecting water into the lower part of the muddy area through a jet of water, an air area and a muddy area are formed in the ground while jet water is injected to raise the pipe body. The jet water injection is stopped, cement milk is injected into the lower part of the muddy water area, the pipe body is raised to form a cement-added mud region, and then the pipe body is lowered and the muddy water is poured from the muddy water area through the pipe body. When cement-added mud is detected in the muddy water sucked up, the descent of the tube is stopped and the tube is raised again, while jet water is injected to cut the ground and compressed air is released from the tube. The system discharges water to form an air region and a muddy water region in the ground.
［作 用］
本発明によれば、管体を上昇させ乍ら地盤中に空気領域
と泥水領域を形成した後ジェット水の噴射を停止し、セ
メントミルクを泥水領域の下方へ噴射証人してセメント
添加泥領域を形成し、その後、管体を降下させ乍ら泥水
領域から管体を通して泥水を吸い上げ、吸い上げられた
泥水中からセメント添加泥が検出された時に管体の降下
を中止して再び管体を上昇させ乍ら、ジェット水を噴射
して地盤を切削すると共に管体から圧縮空気を吐出して
、地盤中に空気領域と泥水領域を形成していくことによ
って、地盤中にセメント添加泥の改良体が順次造成され
ていく。[Function] According to the present invention, after forming an air region and a muddy water region in the ground while raising the pipe body, the injection of jet water is stopped, and cement milk is injected downward into the muddy water region and cement The pipe body is then lowered to form an added mud area, and muddy water is sucked up from the muddy water area through the pipe body, and when cement-added mud is detected from the muddy water sucked up, the descent of the pipe body is stopped and the pipe is opened again. While raising the body, jet water is injected to cut the ground, and compressed air is discharged from the pipe body to form an air region and a muddy water region in the ground, thereby removing cement-added mud into the ground. Improvements are being created one after another.
そして、地上に排出される泥水中にセメント添加泥を一
時的に含むことはあっても、排出される泥水の大部分は
切削された土砂と水である。Although the muddy water discharged to the ground may temporarily contain cement-added mud, the majority of the discharged muddy water consists of cut earth and sand and water.
以下、本発明に係る噴射注入工法の一実施例を第１図乃
至第８図に基づき詳細に説明する。尚、本発明工法は、
第９図に示す従来の噴射注入装置を利用するものである
ため、この噴射証人装置の概略構成を図示して本発明工
法の実施例を説明し、又、同一のものは同一符号を以っ
て表示する。Hereinafter, one embodiment of the injection injection method according to the present invention will be described in detail with reference to FIGS. 1 to 8. In addition, the construction method of the present invention is
Since the conventional injection injection device shown in FIG. 9 is used, the embodiment of the method of the present invention will be explained by illustrating the schematic configuration of this injection witness device, and the same parts will be designated by the same reference numerals. to be displayed.
先ず、第１図に示すように地盤３に穿孔した噴射孔２９
内に昇降装置によって注入外管５を挿入した後、注入外
管５を昇降装置で揺動１回転させ乍らポンプから送水さ
れたジェット水Ｗを噴射ノズル１９から噴射して地盤３
を切削し、この切削間隙にコンプレッサで圧送された圧
縮空気が空気吹出口２１から充填される。First, as shown in Fig. 1, an injection hole 29 is drilled into the ground 3.
After inserting the injection outer tube 5 into the ground 3 using the lifting device, the injection outer tube 5 is swung once by the lifting device and the jet water W fed from the pump is injected from the injection nozzle 19 to cool the ground 3.
The cutting gap is filled with compressed air pumped by a compressor from the air outlet 21.
そして、昇降装置によって注入外管５を第２図の如く徐
々に上昇させ乍ら地盤３を上方向に切削していくことに
より、地盤３中に空気領域Ａと泥水領域りとが区画形成
されるが、泥水領域り中の泥水Ｗ１は上述したエアリフ
ト効果によって排泥口２３から地上に排出され、従来と
同様に沈澱層で土砂が沈澱され、上澄み部が再び泥水注
入管１５を介して泥水領域りへ注入される。Then, by gradually raising the injection pipe 5 using the lifting device as shown in Fig. 2 and cutting the ground 3 upward, an air region A and a muddy water region are formed in the ground 3. However, the muddy water W1 in the muddy water area is discharged to the ground from the mud drain port 23 by the above-mentioned air lift effect, the earth and sand are settled in the sedimentation layer as in the conventional case, and the supernatant water is returned to the muddy water via the muddy water injection pipe 15. Injected into the area.
そして、注入ノズル２７から排泥口２３までの距離をｌ
、排泥口２３から噴射ノズル１９までの距離をｍとする
と、第３図に示すように切削開始点Ｐからｌ＋ｍの距離
分注入外管５を上昇して地盤３を切削した処で、第４図
に示すようにジェット水Ｗの噴射を止め、ポンプで注入
ノズル２７からセメントミルクＳを泥水領域りの下方へ
噴射注入し乍ら第５図の如く注入外管５を距離ｌたけ上
昇すると、セメントミルクＳの比重が泥水よりも重いた
め、距離！の厚みを持ったセメント添加泥領域Ｍが泥水
領域りの下方に造成される。従って、地盤３中にはセメ
ント添加泥領域Ｍと泥水領域りと空気領域Ａの三層が区
画形成される
次いで、上記セメント添加泥領域Ｍが造成された処でセ
メントミルクＳの注入を中止し、第６図に示すように注
入外管５を距離！程下降させると、エアリフト効果によ
って泥水領域り中の泥水ＷＩが排泥口２３から排出され
る。そして、セメント添加泥領域Ｍ中に注入外管５が下
降することによって、地上に排出された泥水ＷＩ中にセ
メントミルクＳが含有していることが排泥管１５の出口
等に設置したｐＨ計で認められると、注入外管５の降下
が中止される。そして、第７図に示すように再びジェ・
ント水Ｗの噴射が開始されて注入外管５が昇降装置によ
って上方へ移動され、地盤３の切削が再開される。Then, the distance from the injection nozzle 27 to the mud removal port 23 is l.
Assuming that the distance from the mud draining port 23 to the injection nozzle 19 is m, as shown in FIG. As shown in Fig. 4, the injection of jet water W is stopped, and while cement milk S is injected from the injection nozzle 27 downward into the muddy water area using a pump, the outer injection pipe 5 is raised by a distance l as shown in Fig. 5. , because the specific gravity of cement milk S is heavier than muddy water, the distance! A cement-added mud region M having a thickness of 1 is created below the muddy water region. Therefore, three layers are formed in the ground 3: a cement-added mud region M, a muddy water region, and an air region A. Next, the injection of cement milk S is stopped at the place where the cement-added mud region M is created. , distance the injection tube 5 as shown in Figure 6! When the muddy water WI is lowered by a certain amount, the muddy water WI in the muddy water area is discharged from the mud draining port 23 due to the air lift effect. When the outer injection pipe 5 descends into the cement-added mud area M, a pH meter installed at the outlet of the mud removal pipe 15 detects that the cement milk S is contained in the muddy water WI discharged to the ground. If this is recognized, the lowering of the injection tube 5 is stopped. Then, as shown in Figure 7,
The injection of water W starts, the outer injection pipe 5 is moved upward by the lifting device, and cutting of the ground 3 is restarted.
斯様に地盤３の切削が再開され、注入外管５が上昇する
と、泥水領域りが上方へ順次拡大形成されていくが、第
８図に示すように注入外管５が距離１＋ｍ程上昇して地
盤３を切削した処でジェット水Ｗの噴射を止め、そして
、以下、上述した第４図乃至第８図の工程を繰り返して
いくことによって、地盤３中にセメント添加泥領域Ｍの
改良体が順次造成されていく。When the cutting of the ground 3 is resumed in this way and the outer injection pipe 5 rises, the muddy water area gradually expands upward, but as shown in Fig. 8, the outer injection pipe 5 rises by a distance of 1+m. After cutting the ground 3, the injection of jet water W is stopped, and by repeating the steps shown in Figs. will be created sequentially.
このように、第９図に示す噴射注入装置を用いて地盤３
中にセメント添加泥領域Ｍを形成する場合、従来では注
入外管５を上昇させ乍ら噴射ノズル１９からのジェット
水Ｗで地盤３を切削し、これと同時に注入ノズル２７か
らセメントミルクＳを注入していたため、注入されたセ
メントミルクＳが泥水領域り中の土砂と混合して排泥管
１３から地上に排出されてしまっていたが、本実施例は
、注入外管５を適宜上昇、降下させ乍らジェット水Ｗの
噴射とセメントミルクＳの注入をステ、７プ毎に交互に
行なうようにしたから、地上に排出された泥水Ｗｌ中に
はセメントミルクＳを一時的に含有することはあっても
、排出された大部分の泥水Ｗ、は切削された土砂と水で
ある。In this way, the ground 3
When forming a cement-added mud region M in the mud, conventionally, the injection outer pipe 5 is raised while the ground 3 is cut with jet water W from the injection nozzle 19, and at the same time, cement milk S is injected from the injection nozzle 27. As a result, the injected cement milk S mixes with the earth and sand in the muddy water area and is discharged to the ground from the mud drainage pipe 13. However, in this embodiment, the injection outer pipe 5 is raised and lowered as appropriate. At the same time, the injection of jet water W and the injection of cement milk S were performed alternately every 7 steps, so cement milk S was not temporarily contained in the muddy water Wl discharged to the ground. Even if there is, most of the discharged muddy water W is cut earth and sand and water.
従って、本実施例によれば、排出された泥水Ｗ１を産業
排気物として処理する必要がなくなり、従来に比し費用
の低廉が図れることとなった。Therefore, according to this embodiment, it is no longer necessary to treat the discharged muddy water W1 as industrial waste, and costs can be reduced compared to the conventional method.
以上述べたように、本発明は、地盤中に埋入された管体
からジェット水を噴射して地盤を切削すると共に管体か
ら常に圧縮空気を吐出することにより、上記地盤中に空
気領域と泥水領域とを形成し、上記空気領域の圧縮空気
を利用したエアリフト効果で泥水領域から管体を通して
泥水を吸い上げ、この吸い上げた泥水の上澄み部を再び
地盤中の泥水領域に戻し、セメントミルクを管体を通し
て上記泥水ｅＭＭｔの下方へ噴射圧入し乍らセメント添
加泥領域を形成する噴射注入工法に於て、ジェット水を
噴射し管体を上昇させ乍ら地盤中に空気領域と泥水領域
を形成した後ジェット水の噴射を停止し、セメントミル
クを泥水領域の下方へ噴射注入し乍ら管体を上昇させセ
メント添加泥饋域を形成し、その後、管体を降下させ乍
ら泥水領域から管体を通して泥水を吸い上げ、吸い上げ
られた泥水中からセメント添加泥が検出された時に管体
の降下を中止して再び管体を上昇させ乍ら、ジェット水
を噴射して地盤を切削すると共に管体から圧縮空気を吐
出して、地盤中に空気領域と泥水領域を形成していくも
のであるから、地上に排出された泥水中にはセメント添
加泥を一時的に含有することはあっても、排出された大
部分の泥水は切削された土砂と水である。As described above, the present invention creates an air region in the ground by injecting jet water from a pipe buried in the ground to cut the ground and constantly discharging compressed air from the pipe. A muddy water area is formed, and the muddy water is sucked up from the muddy water area through the pipe body by the air lift effect using compressed air in the air area, the supernatant part of this sucked up muddy water is returned to the muddy water area in the ground, and the cement milk is poured into the pipe. In the injection injection method in which a cement-added mud region is formed while injecting muddy water through the body into the lower part of the mud eMMt, an air region and a muddy water region are formed in the ground while jet water is injected to raise the pipe body. After that, the jet water injection is stopped, and cement milk is injected into the lower part of the muddy water area while the pipe body is raised to form a cement-added muddy area.Then, the pipe body is lowered and the pipe body is removed from the muddy water area. When cement-added mud is detected in the sucked up mud, the descent of the pipe is stopped and the pipe is raised again, while a jet of water is injected to cut the ground and remove the mud from the pipe. Since compressed air is discharged to form an air region and a muddy water region in the ground, although the muddy water discharged to the ground may temporarily contain cement-added mud, it is difficult to discharge it. Most of the muddy water produced is excavated earth and sand and water.
従って、本発明によれば、排出された泥水を産業排気物
として処理する必要がなくなり、その結果、従来に比し
費用の低廉が図れることとなった。Therefore, according to the present invention, it is no longer necessary to treat discharged muddy water as industrial exhaust, and as a result, costs can be reduced compared to the conventional method.
第１図乃至第８図は本発明の一実施例に係る噴射注入工
法の作業工程を示す説明図である。
第９図は従来の噴射注入装置の縦断面図である。
〔主要な部分の符号の説明〕
３・・・地盤
５・・・注入外管
１９・・・噴射ノズル
２１・・・空気吹出口
２３・・・排泥口
２７・・・注入ノズル
Ａ・・・空気領域
Ｄ・・・泥水領域
Ｍ・・・セメント添加泥領域
Ｓ・・・セメントミルク
Ｗ・・・ジェット水
Ｗｌ・・・泥水。
特許出願人 日本基礎技術株式会社
第
図
２７（ｊヱ入ノズル）
第
図
Ｓ（仁ゾＶｈミルク）
第
図
第
図
第
図
第
図
第
図FIGS. 1 to 8 are explanatory diagrams showing the working steps of the injection injection method according to an embodiment of the present invention. FIG. 9 is a longitudinal sectional view of a conventional injection injection device. [Explanation of symbols of main parts] 3...Ground 5...Injection outer pipe 19...Injection nozzle 21...Air outlet 23...Sludge removal port 27...Injection nozzle A... -Air region D...Muddy water region M...Cement added mud region S...Cement milk W...Jet water Wl...Muddy water. Patent Applicant: Japan Basic Technology Co., Ltd. Figure 27 (J-input nozzle) Figure S (Nizo Vh Milk) Figure Figure Figure Figure Figure Figure
Claims (1)
て地盤を切削すると共に管体から常に圧縮空気を吐出す
ることにより、上記地盤中に空気領域と泥水領域とを形
成し、上記空気領域の圧縮空気を利用したエアリフト効
果で泥水領域から管体を通して泥水を吸い上げ、この吸
い上げた泥水の上澄み部を再び地盤中の泥水領域に戻し
、セメントミルクを管体を通して上記泥水領域の下方へ
噴射注入し乍らセメント添加泥領域を形成する噴射注入
工法に於て、ジェット水を噴射し管体を上昇させ乍ら地
盤中に空気領域と泥水領域を形成した後ジェット水の噴
射を停止し、セメントミルクを泥水領域の下方へ噴射注
入し乍ら管体を上昇させセメント添加泥領域を形成し、
その後、管体を降下させ乍ら泥水領域から管体を通して
泥水を吸い上げ、吸い上げられた泥水中からセメント添
加泥が検出された時に管体の降下を中止して再び管体を
上昇させ乍ら、ジェット水を噴射して地盤を切削すると
共に管体から圧縮空気を吐出して、地盤中に空気領域と
泥水領域を形成していくことを特徴とする噴射注入工法
。(1) Forming an air region and a muddy water region in the ground by injecting jet water from a pipe buried in the ground to cut the ground and constantly discharging compressed air from the pipe; The air lift effect using the compressed air in the air area sucks up muddy water from the muddy area through the pipe body, the supernatant part of this sucked up muddy water is returned to the muddy water area in the ground, and the cement milk is passed through the pipe body and goes below the muddy water area. In the injection injection method, which forms a cement-added mud area while injecting water into the ground, jet water is injected to raise the pipe while forming an air area and a mud area in the ground, and then the injection of jet water is stopped. Then, while injecting cement milk downward into the muddy water area, the tube body is raised to form a cement-added muddy area,
After that, while lowering the pipe body, suck up muddy water from the muddy water area through the pipe body, and when cement-added mud is detected from the sucked up muddy water, stop the descent of the pipe body and raise the pipe body again. An injection injection method characterized by injecting jet water to cut the ground and discharging compressed air from a pipe to form an air region and a muddy water region in the ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19851390A JP2846716B2 (en) | 1990-07-26 | 1990-07-26 | Injection injection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19851390A JP2846716B2 (en) | 1990-07-26 | 1990-07-26 | Injection injection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0485412A true JPH0485412A (en) | 1992-03-18 |
| JP2846716B2 JP2846716B2 (en) | 1999-01-13 |
Family
ID=16392391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19851390A Expired - Lifetime JP2846716B2 (en) | 1990-07-26 | 1990-07-26 | Injection injection method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2846716B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7029207B2 (en) * | 2003-05-22 | 2006-04-18 | Yong-Hyun Kim | Rapid-set injection system using high-speed jet fluid |
| CN102817347A (en) * | 2012-09-05 | 2012-12-12 | 北京东方新星石化工程股份有限公司 | Reaming device for reinforcing soft soil foundation |
-
1990
- 1990-07-26 JP JP19851390A patent/JP2846716B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7029207B2 (en) * | 2003-05-22 | 2006-04-18 | Yong-Hyun Kim | Rapid-set injection system using high-speed jet fluid |
| CN102817347A (en) * | 2012-09-05 | 2012-12-12 | 北京东方新星石化工程股份有限公司 | Reaming device for reinforcing soft soil foundation |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2846716B2 (en) | 1999-01-13 |
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