JPH0455517A - Erecting method for sleeve pipe - Google Patents
Erecting method for sleeve pipeInfo
- Publication number
- JPH0455517A JPH0455517A JP16791290A JP16791290A JPH0455517A JP H0455517 A JPH0455517 A JP H0455517A JP 16791290 A JP16791290 A JP 16791290A JP 16791290 A JP16791290 A JP 16791290A JP H0455517 A JPH0455517 A JP H0455517A
- Authority
- JP
- Japan
- Prior art keywords
- sleeve pipe
- screw shaft
- shaft
- ground
- pipe
- 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
- 238000000034 method Methods 0.000 title description 9
- 239000011440 grout Substances 0.000 claims abstract description 13
- 230000000149 penetrating effect Effects 0.000 claims abstract description 3
- 238000010276 construction Methods 0.000 claims description 8
- 238000005553 drilling Methods 0.000 claims description 7
- 238000009412 basement excavation Methods 0.000 claims description 2
- 239000012527 feed solution Substances 0.000 abstract 1
- 238000002347 injection Methods 0.000 description 13
- 239000007924 injection Substances 0.000 description 13
- 238000002360 preparation method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明はスリーブ注入工法を適用して地盤改良を行なう
に際し、その前段で行われるスリーブパイプの建込み方
法に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for erecting a sleeve pipe, which is carried out at a preliminary stage when performing ground improvement by applying the sleeve injection method.
従来の技術とその問題点
スリーブ注入工法は、地盤中にスリーブパイプ（外管）
を注入管として建込み、これにダブルパッカーを装着し
た注入用内管を挿入し、任意の位置で注入を行なう工法
である。Conventional technology and its problems The sleeve injection method involves inserting a sleeve pipe (outer pipe) into the ground.
This is a construction method in which a pipe is built as an injection pipe, an inner injection pipe equipped with a double packer is inserted into the pipe, and injection is performed at an arbitrary position.
従来スリーブパイプの建込みは、第１０図（イ）〜（ニ
）に手順の概略を示すように、注入範囲最下端まで１０
０ｍｍφ前後のケーシングパイプ（ａ）にて削孔しく第
１０図（イ）参照）、その中にシールグラウト（ｂ）を
充填した後（第１０図（ロ）参照）、該グラウト（ｂ）
内にスリーブパイプ（Ｃ）を建込み、その後ケーシング
パイプ（ａ）を撤去するという方法で行われていた。と
ころが従来の建込み法では工程数が多い上、ケーシング
パイプ（ａ）の撤去に多大の人手と時間を要し、その改
善が望まれていた。Conventionally, the sleeve pipe is built up to the lowest end of the injection range, as shown in the outline of the procedure in Figures 10 (a) to (d).
After drilling a hole in the casing pipe (a) with a diameter of around 0 mm (see Figure 10 (a)) and filling it with seal grout (b) (see Figure 10 (b)), the grout (b)
The method used was to install a sleeve pipe (C) inside the casing pipe and then remove the casing pipe (a). However, the conventional erection method requires a large number of steps and requires a great deal of manpower and time to remove the casing pipe (a), and improvements have been desired.
本発明はこのような要望に鑑みなされたものである。The present invention has been made in view of these demands.
問題点を解決するための手段
本発明は、アースオーガの中空スクリュー軸内−に予め
スリーブパイプを仕込んだ状態で、オーガヘッドの掘削
案内で地盤を削孔しつつ上記スクリュー軸及びその内部
のスリーブパイプを地盤内の所定深度まで貫入し、次に
上記スクリュー軸の下端から削孔内にシールグラウトを
充填しつつ、且つスリーブパイプをスクリュー軸下端の
開口を通じ貫入位置に残したままで、上記スクリュー軸
を地上へ徐々に引上げて行くことを特徴とするスリーブ
パイプの建込み方法に係る。Means for Solving the Problems The present invention provides a method in which, with a sleeve pipe installed in the hollow screw shaft of an earth auger in advance, the screw shaft and the sleeve inside it are drilled in the ground with the excavation guide of the auger head. Penetrate the pipe into the ground to a predetermined depth, and then fill the hole with seal grout from the lower end of the screw shaft while leaving the sleeve pipe in the penetrating position through the opening at the lower end of the screw shaft. This relates to a method of erecting a sleeve pipe, which is characterized by gradually raising the sleeve pipe to the ground.
実施例
以下に本発明の一実施例を添附図面にもとづき説明する
と次の通りである。EXAMPLE An example of the present invention will be described below with reference to the accompanying drawings.
本発明に於ては削孔手段としてアースオーガ（１）が適
用される。アースオーガ（１）はベースマシン（２）に
搭載された状態でリーダ（３）に沿い昇降される。リー
ダ（３）はシリンダ（４）の作動をして、基端枢支部（
３ａ）を支点として適宜起伏される。In the present invention, an earth auger (1) is used as the hole drilling means. The earth auger (1) is mounted on the base machine (2) and is moved up and down along the leader (3). The reader (3) actuates the cylinder (4) to move the proximal pivot (
It is undulated as appropriate using 3a) as a fulcrum.
アースオーガ（１）はリーダ（３）に沿い常法手段の適
用により昇降される駆動機（５）を具備し、該駆動機（
５）により回転される回転軸（６）は中空で上部（６ａ
）は駆動機（５）より上方へ突出し、下端には同径の中
空スクリュー軸（７）が同軸状に接続されている。スク
リュー軸（７）の下端にはオーガヘッド（８）が軸下端
の開口（７ａ） （第９図参照）を開放するように備え
られている。リーダ（３）の上端には押えロッド（９）
（第５図参照）を把持するためのクランプ（１０）が、
その中心とアースオーガ（１）の中心軸線とが一致する
ように側方張出し状に取付けられている。The earth auger (1) is equipped with a drive machine (5) which is raised and lowered by application of conventional means along the leader (3);
The rotating shaft (6) rotated by the shaft (6) is hollow and has an upper part (6a
) protrudes upward from the driver (5), and a hollow screw shaft (7) of the same diameter is coaxially connected to the lower end. An auger head (8) is provided at the lower end of the screw shaft (7) so as to open an opening (7a) (see FIG. 9) at the lower end of the shaft. A presser rod (9) is attached to the upper end of the leader (3).
(See Figure 5) A clamp (10) for gripping the
The earth auger (1) is attached so that its center coincides with the center axis of the earth auger (1) so that it extends laterally.
アースオーガ（１）により地盤を削孔するに際し、該オ
ーガ（１）の中空軸（６） 、（７）内にスリーブパイ
プ（１１）が仕込まれ、この仕込みは、第１〜第２図に
示すように、アースオーガ（１）及びそのり−ダ（３）
を横倒しにした状態で行うことが便利である。When drilling holes in the ground with the earth auger (1), sleeve pipes (11) are inserted into the hollow shafts (6) and (7) of the auger (1), and this preparation is shown in Figures 1 and 2. As shown, earth auger (1) and its leader (3)
It is convenient to do this while lying on its side.
仕込み操作を第１〜２図にもとづき説明すると、スリー
ブパイプ（１１）は第１図に矢符で示すように、開放状
態のクランプ（１０）を経て中空回転軸（６）及びこれ
に接続する中空スクリュー軸（７）内へと挿入され、上
端の一部を残し挿入を終える。残された上端部（ｌｌａ
）には、第８図に詳細に示されるように、止め環（１２
）が嵌装され、止め環（１２）は嵌装後、最初にねじ部
（１２ｇ）に於て中空回転軸（６）の上端部とねじ結合
され、次にセットビス（１３）を用いてスリーブパイプ
（１１）の上端部（ｌｌａ） と結合され、鼓にスリー
ブパイプ（１１）の仕込みを終える。The preparation operation will be explained based on Figs. 1 and 2. As shown by the arrow in Fig. 1, the sleeve pipe (11) is connected to the hollow rotating shaft (6) through the open clamp (10). It is inserted into the hollow screw shaft (7), and the insertion is completed leaving a part of the upper end. The remaining upper end (lla
) has a retaining ring (12
) is fitted, and after fitting, the retaining ring (12) is first screwed to the upper end of the hollow rotating shaft (6) at the threaded part (12g), and then screwed to the upper end of the hollow rotating shaft (6) using the set screw (13). It is connected to the upper end (lla) of the sleeve pipe (11), completing the preparation of the sleeve pipe (11) into the drum.
スリーブパイプ（１１）の外径は、回転軸（６）及びス
クリュー軸（７）の内径よりも小さく、仕込み状態に於
ては、第８図に示されるように、軸（６）及び（７）と
の間にグラウトの注入通路（１４）が形成される。注入
通路（１４）内に適宜グラウトを供給するために、回転
軸（６）の上端部にスイベルジョイン） 、（１５）が
備えられている。上記注入通路（１４）の上端は、第８
図に示されるように、回転軸（６）の上端より内方へ突
出された鍔部（６ｂ）により閉じられている。The outer diameter of the sleeve pipe (11) is smaller than the inner diameter of the rotating shaft (6) and the screw shaft (7), and in the preparation state, as shown in FIG. ) is formed between the grout injection passage (14). In order to appropriately supply grout into the injection channel (14), a swivel joint (15) is provided at the upper end of the rotating shaft (6). The upper end of the injection passage (14) is located at the eighth
As shown in the figure, it is closed by a flange (6b) that protrudes inward from the upper end of the rotating shaft (6).
スリーブパイプ（１１）の仕込みを終えた後は、第３図
に示されるようにシリンダ（４）の作動をしてアースオ
ーガ（１）並びにそのリーダ（３）が起立される。スリ
ーブパイプ（１１）の仕込みは、施工現場にベースマシ
ン（２）を搬入する以前の段階で行っておいてもよい。After the sleeve pipe (11) has been prepared, the cylinder (4) is operated to raise the earth auger (1) and its leader (3) as shown in FIG. The sleeve pipe (11) may be prepared before the base machine (2) is transported to the construction site.
スリーブパイプ（１１）の建込みに際しては、第３図に
示す状態で、アースオーガ（１）の作動で地盤が削孔さ
れ、この削孔につれ、スクリュー軸（７）と共に、その
内部のスリーブパイプ（１１）が地盤内に所定の深度ま
で貫入される。この状態が第４図に示されている。削孔
操作中、スリーブパイプ（１１）は下端から土圧を受け
るが、該パイプ（１１）は上端側で止め環（１２）のね
じ部（１２りを介し、回転軸（６）の上端とねじ結合さ
れているので、下端から受ける土庄に充分に対抗でき、
スクリュー軸（７）と一体に地盤内を進むことができる
。When erecting the sleeve pipe (11), a hole is drilled in the ground by the operation of the earth auger (1) in the state shown in Fig. 3, and as the hole is drilled, the sleeve pipe inside it along with the screw shaft (7) is drilled. (11) is penetrated into the ground to a predetermined depth. This state is shown in FIG. During the drilling operation, the sleeve pipe (11) receives earth pressure from the lower end, but the sleeve pipe (11) is connected to the upper end of the rotating shaft (6) through the threaded part (12) of the retaining ring (12) on the upper end side. Since it is screwed together, it can sufficiently resist the impact from the lower end.
It can move through the ground together with the screw shaft (7).
削孔を終えた後は、止め環（１２）の取外しによりスリ
ーブパイプ（１１）が回転軸（６）及びスクリュー軸（
７）からフリーにされると共に該パイプ（１１）は第５
図に示されるようにその先端が削孔（１６）の底に当止
するまで押えロッド（９）を介し押下げられ、一方、押
えロッド（９）は上端に於て、クランプ（１０）により
把持固定される。更に回転軸（６）及びスクリュー軸（
７）内の注入通路（１４） （第８図参照）が、回転軸
（６）上端のスイベルジヨイント（１５）及びこれに接
続する送液ポンプ（１９）付導管（１７）を介し、グラ
ウトの貯槽（１８）に連絡される。After drilling the hole, remove the retaining ring (12) and the sleeve pipe (11) will be attached to the rotating shaft (6) and the screw shaft (
7) and the pipe (11) is freed from the fifth pipe (11).
As shown in the figure, the presser rod (9) is pressed down until its tip touches the bottom of the drilled hole (16), while the presser rod (9) is held at its upper end by a clamp (10). It is gripped and fixed. Furthermore, the rotating shaft (6) and the screw shaft (
The injection passage (14) (see Fig. 8) in storage tank (18).
第５図に示す状態で、送液ポンプ（１９）の作動をして
グラウトを貯槽（１８）から導管（１７）、スイベルジ
ヨイント（１５）、注入通路（１４）を順次経て、スク
リュー軸（７）の下端から削孔（１６）内に充填しつつ
、アースオーガ（１）がスリーブパイプ（１１）を削孔
（１６）内に残したままで徐々に地上へ引上げられる。In the state shown in Fig. 5, the liquid feed pump (19) is operated to transport the grout from the storage tank (18) through the conduit (17), swivel joint (15), and injection passage (14) in order to the screw shaft ( 7) While filling the borehole (16) from the lower end, the earth auger (1) is gradually pulled up to the ground while leaving the sleeve pipe (11) in the borehole (16).
第６図はアースオーガ（１）の引上げ終了時の状況を示
し、削孔（１６）内に充填されたグラウト（２０）内に
スリーブパイプ（１１）が挿入設置されている。FIG. 6 shows the situation when the earth auger (1) has finished pulling up, and the sleeve pipe (11) is inserted into the grout (20) filled in the drilled hole (16).
面してこの状態でグラウト（２０）の養生固化を計るこ
とにより、第７図に示す通り、スリーブパイプ（１１）
の建込みが完了する。By curing and solidifying the grout (20) in this state, the sleeve pipe (11)
construction is completed.
スリーブパイプ（１１）の建込みを終えた後は、該パイ
プ（１１）内にダブルパッカーを備えた注入用内管（図
示せず）が挿入され、常法通りクラッキングと水押しを
経て後、グラウトの注入が行なわれる。After finishing the construction of the sleeve pipe (11), an inner injection pipe (not shown) equipped with a double packer is inserted into the pipe (11), and after cracking and water pushing in the usual manner, Grout injection is carried out.
効 果
本発明工法によれば、アースオーガによる削孔と削孔内
よりのオーガ引上げの間を利用して、削孔内へのスリー
ブパイプの設置と、更にグラウト充填を行い得るので、
スリーブパイプの建込みを実質的に一工程で行なうこと
が可能となり、作業能率の向上と省力化を計り得る特徴
を有する。Effects According to the construction method of the present invention, it is possible to install a sleeve pipe in the hole and fill it with grout by using the time between drilling with the earth auger and pulling up the auger from inside the hole.
It is possible to erect the sleeve pipe in substantially one step, and has the feature of improving work efficiency and saving labor.
第１〜７図は本発明工法の一実施状況を工程順に示す説
明図、第８図はスリーブパイプと中空回転軸との結合手
段の一例を示す縦断面図、第９図はスクリュー軸の下端
部の拡大図、第１０図は従来工法の説明図である。
図に於て、（１）はアースオーガ、（２）はベースマシ
ン、（３）はリーダ、（４）はシリンダ、（５）は駆動
機、（６）は中空回転軸、（７）は中空スクリュー軸、
（８）はオーガヘッド、（９）は押えロッド、（１０）
はクランプ、（１１）はスリーブパイプである。
（以 上）Figures 1 to 7 are explanatory diagrams showing the implementation status of the construction method of the present invention in the order of steps, Figure 8 is a longitudinal cross-sectional view showing an example of the coupling means between the sleeve pipe and the hollow rotating shaft, and Figure 9 is the lower end of the screw shaft. FIG. 10 is an explanatory diagram of the conventional construction method. In the figure, (1) is the earth auger, (2) is the base machine, (3) is the leader, (4) is the cylinder, (5) is the driver, (6) is the hollow rotating shaft, and (7) is the hollow screw shaft,
(8) is the auger head, (9) is the presser rod, (10)
is a clamp, and (11) is a sleeve pipe. (that's all)
Claims (1)
ブパイプを仕込んだ状態で、オーガヘッドの掘削案内で
地盤を削孔しつつ上記スクリュー軸及びその内部のスリ
ーブパイプを地盤内の所定深度まで貫入し、次に上記ス
クリュー軸の下端から削孔内にシールグラウトを充填し
つつ、且つスリーブパイプをスクリュー軸下端の開口を
通じ貫入位置に残したままで、上記スクリュー軸を地上
へ徐々に引上げて行くことを特徴とするスリーブパイプ
の建込み方法。(1) With the sleeve pipe installed in the hollow screw shaft of the earth auger in advance, the screw shaft and the sleeve pipe inside the screw shaft are penetrated into the ground to a predetermined depth while drilling a hole in the ground using the excavation guide of the auger head. Next, while filling the hole with seal grout from the lower end of the screw shaft and leaving the sleeve pipe in the penetrating position through the opening at the lower end of the screw shaft, the screw shaft is gradually pulled up to the ground. Features a sleeve pipe construction method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16791290A JPH0788657B2 (en) | 1990-06-25 | 1990-06-25 | How to install a sleeve pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16791290A JPH0788657B2 (en) | 1990-06-25 | 1990-06-25 | How to install a sleeve pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0455517A true JPH0455517A (en) | 1992-02-24 |
| JPH0788657B2 JPH0788657B2 (en) | 1995-09-27 |
Family
ID=15858358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16791290A Expired - Fee Related JPH0788657B2 (en) | 1990-06-25 | 1990-06-25 | How to install a sleeve pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0788657B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0624020U (en) * | 1992-06-19 | 1994-03-29 | 株式会社大阪防水建設社 | Sleeve pipe installation device |
| JP2012007364A (en) * | 2010-06-24 | 2012-01-12 | Toa Harbor Works Co Ltd | Device and method for preventing pipe body from being pulled out |
-
1990
- 1990-06-25 JP JP16791290A patent/JPH0788657B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0624020U (en) * | 1992-06-19 | 1994-03-29 | 株式会社大阪防水建設社 | Sleeve pipe installation device |
| JP2012007364A (en) * | 2010-06-24 | 2012-01-12 | Toa Harbor Works Co Ltd | Device and method for preventing pipe body from being pulled out |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0788657B2 (en) | 1995-09-27 |
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Free format text: JAPANESE INTERMEDIATE CODE: R250 |
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