JPS6260536B2 - - Google Patents
Info
- Publication number
- JPS6260536B2 JPS6260536B2 JP4793581A JP4793581A JPS6260536B2 JP S6260536 B2 JPS6260536 B2 JP S6260536B2 JP 4793581 A JP4793581 A JP 4793581A JP 4793581 A JP4793581 A JP 4793581A JP S6260536 B2 JPS6260536 B2 JP S6260536B2
- Authority
- JP
- Japan
- Prior art keywords
- ground
- measuring rod
- casings
- horizontal displacement
- casing
- 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
- 239000002689 soil Substances 0.000 claims description 18
- 238000006073 displacement reaction Methods 0.000 claims description 17
- 239000000945 filler Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 238000010276 construction Methods 0.000 description 8
- 229910000278 bentonite Inorganic materials 0.000 description 6
- 239000000440 bentonite Substances 0.000 description 6
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- JYWJULGYGOLCGW-UHFFFAOYSA-N chloromethyl chloroformate Chemical compound ClCOC(Cl)=O JYWJULGYGOLCGW-UHFFFAOYSA-N 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
- E02D1/08—Investigation of foundation soil in situ after finishing the foundation structure
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
連結地中壁を構築する際に連続地中壁が外側の
地盤に与える水平変位を測定し建設公害を未然に
防止し、根切中における外側の地盤のまわり込み
による水平変位を未然に測定し工事の安全を図る
ことができるようにした地盤内水平変位計設置方
法に関する発明である。[Detailed description of the invention] [Field of industrial application] When constructing a connected underground wall, the horizontal displacement of the continuous underground wall to the outside ground is measured to prevent construction pollution, and to prevent construction pollution from occurring during root cutting. This invention relates to a method for installing an in-ground horizontal displacement meter that can measure horizontal displacement due to ground wrap-around in advance to ensure construction safety.
該当する技術はない。強いて探せば地すべりを
測定するための鋼管杭にひずみ計を張つたものを
現場にて打ちこみ鋼管のひずみを測定する程度の
ものはあつたが、これでは連続地中壁が周囲の地
盤に与える水平変位は測定できない。連続地中壁
が周囲に与える圧力による土の動きにより周囲の
埋設管、構築物等に与える公害を未然に防止した
り、根切中に外側の地盤がまわりこみ工事に与え
る被害を未然に知り得るようにした地盤内水平変
位計設置方法は知られていないものである。
There is no applicable technology. If we were forced to search for landslides, we could find a way to measure landslides by driving a steel pipe pile with strain gauges attached on site and measuring the strain in the steel pipe, but this method does not measure the horizontal impact of a continuous underground wall on the surrounding ground. Displacement cannot be measured. To prevent pollution caused to surrounding buried pipes, structures, etc. due to the movement of soil due to the pressure exerted on the surrounding area by continuous underground walls, and to be able to know beforehand the damage caused to the construction work by the outside ground wrapping around during root cutting. The method for installing horizontal displacement meters in the ground is unknown.
連続地中壁が周囲の地盤に与える圧力による土
の動きにより周囲の構築物、埋設管等に与える悪
影響即ち建設公害、という問題点、根切中におけ
る外側の地盤のまわり込みによる工事に与える被
害という問題点、連続地中壁に土の動きがどのよ
うに影響するかという問題点を解決しようとする
発明である。
Problems include negative effects on surrounding structures, buried pipes, etc. due to soil movement due to the pressure exerted by continuous underground walls on the surrounding ground, i.e. construction pollution, and damage to construction work caused by the surrounding ground surrounding the ground during root cutting. This invention attempts to solve the problem of how soil movement affects continuous underground walls.
地盤内の挙動を測定する傾斜計を内部中央に取
付けた数多のケーシングを一定方向にのみ曲折す
るように連結すると共に、ケーシングの下端に錘
りを連結して測桿を形成し、該測桿をボーリング
孔に真空直に吊下げた後にボーリング孔の下部よ
り周囲の土の挙動をすみやかに測桿に伝えること
ができる硬化後周囲の土と同程度の強度を得られ
る充填材を注入硬化させ、充填材と土とを一体且
つ一定方向に動くようにしたことにより複数の測
桿全体の動き（水平変位）をすみやかに測定し、
公害或は被害を生ずる前に水平変位を知り、防止
作業をすることができるので建設公害或は工事の
被害を未然に防ぐことができ、且つ連続地中壁に
加わる土圧による水平変位を知ることにより、根
切りまでの掘削に当り切り張り等の設置を完全に
することができ、前項の問題点を充分に解決する
ことができたものである。
A number of casings with inclinometers attached to the center of the interior for measuring behavior in the ground are connected so as to bend only in a certain direction, and a weight is connected to the bottom end of the casings to form a measuring rod. After the rod is suspended directly in a borehole under vacuum, the behavior of the surrounding soil can be immediately transmitted to the measuring rod from the bottom of the borehole.After hardening, a filler that can achieve the same strength as the surrounding soil is injected and hardened. By making the filler and soil move together in a fixed direction, the movement (horizontal displacement) of multiple measuring rods can be quickly measured.
It is possible to know the horizontal displacement before pollution or damage occurs and take preventive measures, so it is possible to prevent construction pollution or damage from construction, and also to know the horizontal displacement due to earth pressure applied to continuous underground walls. By doing so, it was possible to complete the installation of the cutting liner etc. during excavation up to the root cutting, and the problems mentioned in the previous section could be satisfactorily solved.
地盤内の挙動を測定する傾斜計を内部中央に取
付けた数多のケーシングを一定方向にのみ曲折す
るように連結すると共に下端に錘りを連結して測
桿を形成し、該測桿をボーリング孔に真垂直に吊
下げた後にボーリング孔の下部より周囲の土の挙
動をすみやかに測桿に伝えることができる硬化後
周囲の土と同程度の強度を得られる充填材を注入
硬化させ、土と充填材とが一体に変位するように
したことにより微少な土の動きを確実且迅速に測
定することができ、又、測桿を一定方向にのみ曲
折するように連結し、土の動き知りたい方向にの
み曲折するように測桿を埋設し、他の土の変位が
加わることがないので誤差を少くすることができ
る。例えば連続地中壁に対し直角方向に曲折する
ように設置し、連続地中壁が周囲の土に与える水
平変位を確実に測定することができた。
A measuring rod is formed by connecting a number of casings with inclinometers attached to the center of the interior to measure the behavior in the ground so that they can bend only in a certain direction, and a weight is connected to the lower end, and the measuring rod is used for boring. After hanging vertically into the borehole, the behavior of the surrounding soil can be immediately transmitted to the gauging rod from the bottom of the borehole.After hardening, a filler that has the same strength as the surrounding soil is injected and hardened. By making the rod and the filling material displace together, minute soil movements can be measured reliably and quickly.Also, by connecting the measuring rod so that it bends only in a certain direction, it is possible to measure the movement of the soil. By burying the surveying rod so that it bends only in the desired direction, the displacement of other soils will not be added, so errors can be reduced. For example, by installing it so that it is bent perpendicular to a continuous underground wall, we were able to reliably measure the horizontal displacement that the continuous underground wall exerts on the surrounding soil.
地盤内水平変位計Ａは、上部に直径がほぼ４イ
ンチの短い取付パイプ１の半分ｌを嵌合して気密
に固定した直径がほぼ３インチで長さがほぼ１ｍ
の傾斜計取付用のケーシング（パイプ）２を多数
形成し、ケーシング２の内部中央に傾斜計３を固
定し、取付パイプ１内にケーシング２の下端を一
定方向（矢印Ｘ）にのみ曲折するようにピン４に
て枢着して数多連結し（従つて全てのピン４は同
軸方向に向けて挿通されているものである。）、最
下段のケーシング２の下端に錘り５の上部の軸受
け６をピン７にて枢着し、ピン７の両端をケーシ
ング２の外部に突出しナツト８を螺合して取付
け、ケーシング２の下端と取付パイプ１と枢着部
の外周にゴムスリーブ９を被覆してケーシング２
と取付パイプ１間に土砂が入るのを防止して成る
ものである。又ケーシング２の上端近くで取付パ
イプ１のやや下部に孔１０を穿つて傾斜計３の測
定線１１をケーシング２より引き出して地上の測
定器（図示せず）に測定線１１を連結できるよう
にしたものである。
Horizontal displacement meter A in the ground has a diameter of approximately 3 inches and a length of approximately 1 m, which is airtightly fixed by fitting half l of a short installation pipe 1 with a diameter of approximately 4 inches to the top.
A large number of casings (pipes) 2 for mounting the inclinometer are formed, the inclinometer 3 is fixed in the center of the inside of the casing 2, and the lower end of the casing 2 is bent only in a certain direction (arrow X) inside the mounting pipe 1. The upper part of the weight 5 is connected to the lower end of the lowermost casing 2 by pivoting with a pin 4 (therefore, all the pins 4 are inserted in the same axial direction). The bearing 6 is pivotally mounted with a pin 7, both ends of the pin 7 protrude outside the casing 2, and a nut 8 is screwed together to attach it, and a rubber sleeve 9 is attached to the lower end of the casing 2, the mounting pipe 1, and the outer periphery of the pivot joint. Cover and casing 2
This prevents earth and sand from entering between the pipe 1 and the mounting pipe 1. Also, a hole 10 is drilled in the slightly lower part of the mounting pipe 1 near the upper end of the casing 2 so that the measuring line 11 of the inclinometer 3 can be pulled out from the casing 2 and connected to a measuring device (not shown) on the ground. This is what I did.
数多のケーシング２を連結した測桿Ｂのうちと
ころどころのケーシング２の取付パイプ１の固定
箇所に取付パイプ１の直径より長いボルト１２を
取付けて吊りボルトとするもので、ボルト１２は
取付パイプ１より両側に同一長さだけ突出させ、
ボルト１２の端部及びその内部にフランジ１３を
取付けて吊りワイヤーがはずれないよう溝１４を
形成する。 Bolts 12, which are longer than the diameter of the mounting pipes 1, are attached to the fixing points of the mounting pipes 1 of the casings 2 at various locations on the measuring rod B, which connects a number of casings 2, to serve as suspension bolts. Make it protrude by the same length on both sides,
A flange 13 is attached to the end of the bolt 12 and the inside thereof, and a groove 14 is formed to prevent the hanging wire from coming off.
従つて数多のケーシング２を取付パイプ１を介
して連結した際、ケーシング２の上端と取付パイ
プ１とは動かないよう強固に固定され、ケーシン
グ２の下端と取付パイプ１とはその直径の差分だ
け移動できるようにしたものである。 Therefore, when a large number of casings 2 are connected via the mounting pipe 1, the upper end of the casing 2 and the mounting pipe 1 are firmly fixed so as not to move, and the lower end of the casing 2 and the mounting pipe 1 have a difference in diameter. It is designed so that it can only be moved.
例えば本発明は
取付パイプ……内径100φ、外径114φ
ケーシング……内径78φ、外径89φ
100−89＝11mm
∴≒５mm（半径）
以上５mmの差分だけ上下のケーシング２は一定
方向（矢印Ｘ）に曲折することができるものであ
る。 For example, in the present invention, the mounting pipe...inner diameter 100φ, outer diameter 114φ casing...inner diameter 78φ, outer diameter 89φ 100−89=11mm ∴≒5mm (radius) The upper and lower casings 2 are in a fixed direction (arrow X) by a difference of 5mm. It can be bent in any direction.
又、測定線１１はケーシング２及び取付パイプ
１並びにゴムスリーブ９の外周に密接して地上に
引き出して地上の測定器に連結するものである。 Further, the measuring line 11 is brought out to the ground in close contact with the outer periphery of the casing 2, the mounting pipe 1, and the rubber sleeve 9, and is connected to a measuring device on the ground.
次に充填材Ｃとしては
ａ 注入時は50φmmのロツドで注入可能な流動性
をもつこと
ｂ 硬化時間は24時間以上のもの
ｃ 周囲の土の挙動をすみやかに測桿に伝えるよ
うに硬化したとき周囲の土と同程度の強度が得
られ
ｄ ベントナイト液と置換できるようにベントナ
イト液より比重の大きいもの
ｅ 弾性が少なく塑性変形をするもの
以上の条件を十分満たすような材料でなければ
ならない。実験の結果
水 5000ｇ（対水重量 ％）
ベントナイト 300ｇ（ ６％）
パライト 1000ｇ（ 20％）
フライアツシユ 2000ｇ（ 40％）
セメント 500ｇ（ 10％）
以上の配合の一軸圧縮強度試験の結果
qu≒1.2Kg／cm2
比重≒1.5（液体時1.33）
充填材Ｃ中ベントナイトはヴーカビリテイを上
げ、パライトは比重を上げ、フライアツシユは歪
の調整をし、セメントで強度を調整するものであ
る。 Next, as filler C, a) It must be fluid enough to be injected with a 50φmm rod when injected.B The curing time is 24 hours or more.c) When it hardens in such a way that the behavior of the surrounding soil can be quickly transmitted to the measuring rod. The material must have a strength comparable to that of the surrounding soil; (d) It must have a higher specific gravity than the bentonite liquid so that it can be replaced with the bentonite liquid; (e) It must have less elasticity and undergo plastic deformation. The material must fully satisfy the above conditions. Experimental results: Water 5000g (wt% of water) Bentonite 300g (6%) Palite 1000g (20%) Fly ash 2000g (40%) Cement 500g (10%) Unconfined compressive strength test results for the above mixture qu≒1.2Kg/ cm 2 specific gravity ≒ 1.5 (1.33 when liquid) Bentonite in filler C increases the vucability, pallite increases the specific gravity, fly ash adjusts distortion, and cement adjusts the strength.
設置施行は
１ ボーリングによつて地中に所定深さのボーリ
ング孔Ｄを掘削する。 Installation: 1. Drill a borehole D to a specified depth in the ground by boring.
２ 一定長さに連結した下端に錘り５を取り付け
た測桿Ｂを吊り下げる。2. Hang measuring rod B connected to a certain length and with weight 5 attached to the lower end.
３ 測桿Ｂの垂直性をチエツクする。3 Check the verticality of measuring rod B.
４ ピツトＥのベントナイト液くみ出しをする。4 Pump out the bentonite liquid from Pittu E.
５ 測桿Ｂの垂直性の最終チエツクをする。5. Make a final check of the verticality of measuring rod B.
６ ロツドを測桿Ｂにそつて挿入し、下からベン
トナイト防壁液を押し上げる方法で充填材Ｃを
注入する。6 Insert the rod along the measuring rod B and inject the filler C by pushing up the bentonite barrier liquid from below.
その際測桿の鉛直性を妨害しないようにあま
り圧力を上げないように行う。 At this time, do not increase the pressure too much so as not to disturb the verticality of the measuring rod.
７ 充填剤Ｃの硬化後測桿Ｂの仮り吊り支持材等
を取り除く。7. After the filler C has hardened, remove the temporary suspension support material of the measuring rod B.
以上の順によつて地盤内水平変位計Ａを所定地
盤に所定本数設置し地盤の水平変位を測定したも
のである。 A predetermined number of in-ground horizontal displacement meters A were installed in a predetermined ground according to the above order, and the horizontal displacement of the ground was measured.
地盤内の挙動を測定する傾斜計を内部中央に取
付けた数多のケーシングを一定方向にのみ曲折す
るように連結した測桿をボーリング孔に真垂直に
吊下したことにより必要方向以外の変位が測定値
に加わらないので測定値の誤差が少なく、硬化後
周囲の土と同程度の強度を得られる充填材を注入
硬化させ、充填材が周囲の土と同程度の強度を有
することにより、土と充填材とが一定に変位する
ので周囲の土の挙動をすみやかに測桿に伝えるこ
とができ正確に地盤の変位を測定することができ
るものである。
By hanging the measuring rod vertically into the borehole, which consists of a number of casings with inclinometers attached to the center of the interior that bend only in a certain direction, displacement in directions other than the required direction is prevented. Since it does not add to the measured value, there is little error in the measured value, and after hardening, the filler has the same strength as the surrounding soil. Since the filler and the filling material are displaced at a constant rate, the behavior of the surrounding soil can be quickly transmitted to the measuring rod, and the displacement of the ground can be accurately measured.
第１図は地盤内水平変位計の全体の正面図、第
２図は第１図のイ部の拡大断面図、第３図は同ロ
部の拡大断面図、第４図は第２図の−線断面
図、第５図は設置状態の正面図である。
Figure 1 is a front view of the entire in-ground horizontal displacement meter, Figure 2 is an enlarged cross-sectional view of the A part in Figure 1, Figure 3 is an enlarged cross-sectional view of the B part, and Figure 4 is an enlarged cross-sectional view of the A part in Figure 2. 5 is a front view of the installed state.
Claims (1)
取付けた数多のケーシングを一定方向にのみ曲折
するように連結すると共に、ケーシングの下端に
錘りを連結して測桿を形成し、該測桿をボーリン
グ孔に真垂直に吊下げた後にボーリング孔の下部
より周囲の土の挙動をすみやかに測桿に伝えるこ
とができる硬化後周囲の土と同程度の強度を得ら
れる充填材を注入硬化させて成ることを特徴とす
る地盤内水平変位計設置方法。1 A number of casings with inclinometers attached to the center of the interior to measure the behavior in the ground are connected so as to bend only in a certain direction, and a weight is connected to the bottom end of the casings to form a measuring rod. After the measuring rod is hung vertically into the borehole, the behavior of the surrounding soil can be immediately transmitted to the measuring rod from the bottom of the borehole.After hardening, a filler material that has the same strength as the surrounding soil is injected. A method for installing a horizontal displacement meter in the ground, characterized by hardening it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4793581A JPS57161222A (en) | 1981-03-31 | 1981-03-31 | Setting of horizontal displacement meter under cround |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4793581A JPS57161222A (en) | 1981-03-31 | 1981-03-31 | Setting of horizontal displacement meter under cround |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57161222A JPS57161222A (en) | 1982-10-04 |
| JPS6260536B2 true JPS6260536B2 (en) | 1987-12-16 |
Family
ID=12789225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4793581A Granted JPS57161222A (en) | 1981-03-31 | 1981-03-31 | Setting of horizontal displacement meter under cround |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57161222A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101240185B1 (en) * | 2011-01-18 | 2013-03-07 | 한국전력공사 | Earthpressure measuring device for cylindrical hole and installing method for the same |
| CN105926571B (en) * | 2016-04-19 | 2017-11-17 | 长沙理工大学 | Fixed horizontal inclination probe propulsion device for widened roadbed |
-
1981
- 1981-03-31 JP JP4793581A patent/JPS57161222A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57161222A (en) | 1982-10-04 |
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