JPS6260538B2 - - Google Patents
Info
- Publication number
- JPS6260538B2 JPS6260538B2 JP55111624A JP11162480A JPS6260538B2 JP S6260538 B2 JPS6260538 B2 JP S6260538B2 JP 55111624 A JP55111624 A JP 55111624A JP 11162480 A JP11162480 A JP 11162480A JP S6260538 B2 JPS6260538 B2 JP S6260538B2
- Authority
- JP
- Japan
- Prior art keywords
- drilling
- drilling fluid
- grout
- mud
- injection
- 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
- 238000005553 drilling Methods 0.000 claims description 43
- 239000012530 fluid Substances 0.000 claims description 16
- 239000011440 grout Substances 0.000 claims description 11
- 239000007924 injection Substances 0.000 claims description 11
- 238000002347 injection Methods 0.000 claims description 11
- 239000000440 bentonite Substances 0.000 claims description 9
- 229910000278 bentonite Inorganic materials 0.000 claims description 9
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 7
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 5
- 229910052804 chromium Inorganic materials 0.000 claims description 4
- 239000011651 chromium Substances 0.000 claims description 4
- 230000002787 reinforcement Effects 0.000 claims 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 239000002689 soil Substances 0.000 description 4
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 3
- 239000001768 carboxy methyl cellulose Substances 0.000 description 3
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 3
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- 229910052708 sodium Inorganic materials 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 239000013505 freshwater Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Description
【発明の詳細な説明】
本発明はグラウト注入等により地盤を強化する
場合の削孔方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for drilling holes when reinforcing the ground by, for example, injecting grout.
グラウト注入において削孔液を吐出させながら
削孔ロツドにより削孔する方法をとることは知ら
れている。そして一般に下向き注入の場合には、
削孔液として水またはベントナイト泥水またはク
ロム泥水を用いることができる。しかるに、水平
または上向き注入の場合、従来、清水を多量に吐
出する方法のみをとつている。その結果、水平削
孔時においては、削孔ロツドの振れが起因して、
孔径が一層大きくなり、その後のグラウト注入時
においてそのロツド周辺からグラウトが流出する
量が多くなり、きわめて不経済となるばかりでな
く、所期の改良効果を期待できないこともある。
他方、上向き削孔の場合、重力作用により削孔清
水が削孔土砂以上の土砂を流出させ、これまた問
題である。しかも、これらの各場合のいずれも、
作業環境および安全性に悪影響を及ぼし、現場を
汚すなどの問題もある。 It is known to use a method of drilling a hole with a drilling rod while discharging a drilling fluid during grout injection. And generally in the case of downward injection,
Water or bentonite mud or chrome mud can be used as the drilling fluid. However, in the case of horizontal or upward injection, conventionally only a method of discharging a large amount of fresh water has been used. As a result, during horizontal drilling, due to the vibration of the drilling rod,
As the hole diameter becomes larger, a large amount of grout flows out from around the rod during subsequent grout injection, which not only becomes extremely uneconomical, but also prevents the desired improvement effect from being expected.
On the other hand, in the case of upward drilling, due to the action of gravity, the fresh water from the drilling causes more soil to flow out than the drilling soil, which is also a problem. Moreover, in each of these cases,
There are also problems such as having a negative impact on the working environment and safety, and polluting the work site.
本発明者は、従来水平または上向き削孔におい
て十分な考察が払われていなかつた点に着目し、
上記問題点に対処するために研究を重ねた結果、
ベントナイト泥水またはクロム泥水を用いればよ
いことの知見を得た。 The present inventor focused on the fact that sufficient consideration had not been given to conventional horizontal or upward drilling,
As a result of repeated research to address the above issues,
It was found that bentonite mud or chromium mud could be used.
すなわち、本発明は、水平または上向きの削孔
時において、削孔液としてベントナイト泥水また
はクロム泥水を用いることを特徴としている。 That is, the present invention is characterized in that bentonite mud or chromium mud is used as the drilling fluid during horizontal or upward drilling.
一般的には、かかる削孔の場合において、削孔
液を清水から泥水に変えたとしても事態は同様で
あるとも考えられよう。また泥水を使用すると、
地山に目詰りを起してグラウト注入が不可能にな
るのではないかとも考えられよう。しかし本発明
者の実験によれば、驚くべきことに事態は全く異
つており、少量の削孔液で削孔でき、土砂の流出
がきわめて少なかつた。また少量の削孔液の吐出
のため、地山が荒れず、削孔ロツドの振れが少な
かつた。さらに削孔用泥水は、削孔ロツドの潤滑
を良好にするので、この点からも土砂の流出を最
少限に抑えることができた。そして、削孔液およ
び土砂の流出が少いため、作業環境を改善でき
る。また特別の泥水処理設備も必要としない利点
もある。 Generally speaking, in the case of such drilling, the situation may be considered to be the same even if the drilling fluid is changed from clean water to muddy water. Also, when using muddy water,
It is also possible that the ground may become clogged, making it impossible to inject grout. However, according to experiments conducted by the present inventors, the situation was surprisingly completely different; the hole could be drilled with a small amount of drilling fluid, and there was very little earth and sand flowing out. Also, because a small amount of drilling fluid was discharged, the ground was not roughened and the swing of the drilling rod was reduced. Furthermore, the muddy water for drilling improves the lubrication of the drilling rod, which also helps to minimize the outflow of earth and sand. Furthermore, since there is less outflow of drilling fluid and soil, the working environment can be improved. It also has the advantage of not requiring special muddy water treatment equipment.
次に図面によつて上向き注入法を説明すると、
１は削孔ロツドで、その注入削孔機２によつて支
持され、対象地盤３に削孔しながら圧入される。
二液硬化性グラウトはホース４，５からスイベル
６内に入り、削孔ロツド本体７を通り先端装置８
の注入口から注入される。泥水削孔液は、ホース
９から同様により先端装置８の注入口または吐出
口から吐出される。１０は架台である。注入に際
しては、まず削孔ロツド本体７に回転力および圧
入力を与えながら削孔するとともに、削孔液を吐
出させる。その後グラウトを注入し、地盤を改良
し、その改良が終了したら次のステツプへと進
む。 Next, the upward injection method will be explained using drawings.
Reference numeral 1 denotes a hole-drilling rod, which is supported by an injection hole-drilling machine 2 and press-fitted into the target ground 3 while drilling a hole therein.
The two-component hardening grout enters the swivel 6 from the hoses 4 and 5, passes through the drilling rod body 7 and the tip device 8.
is injected from the injection port. The muddy drilling fluid is similarly discharged from the hose 9 through the inlet or outlet of the tip device 8. 10 is a pedestal. When injecting, first, a hole is drilled while applying rotational force and pressing force to the drilling rod main body 7, and a drilling fluid is discharged. After that, grout is injected and the ground is improved, and once that improvement is complete, the next step is taken.
ここで削孔液としては、ベントナイト泥水また
はクロム泥水を用いる。ベントナイト泥水として
は、次表の組成が好適である。 Here, bentonite mud or chromium mud is used as the drilling fluid. The composition shown in the following table is suitable for bentonite mud water.
ベントナイト ５〜8wt％
カルボキシメチルセルロース 0.1〜0.5wt％
フミン酸ソーダ 0.01〜0.3wt％
水 残 量
ここで、ベントナイトが5wt％未満であると、
地山の崩壊が発生し易く、8wt％を超えると経済
的に不利である。またカルボキシメチルセルロー
スは分離防止剤として、フミン酸ソーダは分散剤
として機能するが、必らずしも用いなくとも足り
る。Bentonite 5-8wt% Carboxymethyl cellulose 0.1-0.5wt% Sodium humate 0.01-0.3wt% Water Remaining amount Here, if bentonite is less than 5wt%,
The collapse of the ground is likely to occur, and if it exceeds 8wt%, it is economically disadvantageous. Further, although carboxymethyl cellulose functions as a separation preventing agent and sodium humate functions as a dispersing agent, it is not necessary to use them.
以上の例はグラウト注入を例にとつて説明した
が、削孔ロツドを用いて削孔しながら地盤改良を
行うものであれば、その方法にも適用できる。 Although the above example has been explained using grout injection as an example, the present invention can also be applied to any method in which ground improvement is performed while drilling holes using a drilling rod.
次に実施例を示す。 Next, examples will be shown.
実施例
横浜市の某地区における地下鉄トンネル工事に
おいて、導孔の上部半断面について上向きグラウ
ト注入を行うとともに、導孔の切羽へ水平グラウ
ト注入を行つた。その際次の組成の削孔液を用い
ながら削孔した。Example During subway tunnel construction in a certain area of Yokohama City, upward grout was injected into the upper half section of the guide hole, and horizontal grout was injected into the face of the guide hole. At that time, the holes were drilled using a drilling fluid with the following composition.
ベントナイト ５Kg
カルボキシメチルセルロース 0.4Kg
フミン酸ソーダ 少 量
水 100
その結果、削孔液はきわめて少量で足り、流出
土砂は少く、良好な削孔を行うことができた。具
体的には、削孔液使用量は４〜８／分で足り、
従来清水を用いる場合の約30／分と比較してき
わめて少量であつた。Bentonite 5Kg Carboxymethyl cellulose 0.4Kg Sodium humate Small amount Water 100 As a result, only a very small amount of drilling fluid was needed, and there was little runoff of soil, allowing for good drilling. Specifically, the amount of drilling fluid used is 4 to 8 per minute.
The amount was extremely small compared to about 30/min when using conventional clean water.
図面は上向き注入法の一例を示す正面図であ
る。
１……削孔ロツド、６……スイベル、９……削
孔液ホース。
The drawing is a front view showing an example of the upward injection method. 1...Drilling rod, 6...Swivel, 9...Drilling fluid hose.
Claims (1)
としても機能する削孔ロツドに削孔液を圧送させ
ながら削孔ロツドにより水平または上向きに削孔
する際、前記削孔液としてベントナイト泥水また
はクロム泥水を用いることを特徴とする地盤強化
における削孔方法。1. When drilling horizontally or upwardly with a drilling rod while forcing the drilling fluid to flow through the drilling rod, which also functions as an injection pipe, in ground reinforcement by grout injection, use bentonite mud or chromium mud as the drilling fluid. A drilling method for ground reinforcement characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11162480A JPS5740018A (en) | 1980-08-15 | 1980-08-15 | Boring in improvement of ground |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11162480A JPS5740018A (en) | 1980-08-15 | 1980-08-15 | Boring in improvement of ground |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5740018A JPS5740018A (en) | 1982-03-05 |
| JPS6260538B2 true JPS6260538B2 (en) | 1987-12-16 |
Family
ID=14566029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11162480A Granted JPS5740018A (en) | 1980-08-15 | 1980-08-15 | Boring in improvement of ground |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5740018A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0546093A (en) * | 1991-08-19 | 1993-02-26 | Shiojima Kikaku Kk | Tamper-proof seal and method for adhering this tamper-proof seal |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS441330Y1 (en) * | 1965-02-22 | 1969-01-20 |
-
1980
- 1980-08-15 JP JP11162480A patent/JPS5740018A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS441330Y1 (en) * | 1965-02-22 | 1969-01-20 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5740018A (en) | 1982-03-05 |
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