JPH09302656A - Construction control device in pile installation by inner excavation - Google Patents
Construction control device in pile installation by inner excavationInfo
- Publication number
- JPH09302656A JPH09302656A JP11610496A JP11610496A JPH09302656A JP H09302656 A JPH09302656 A JP H09302656A JP 11610496 A JP11610496 A JP 11610496A JP 11610496 A JP11610496 A JP 11610496A JP H09302656 A JPH09302656 A JP H09302656A
- Authority
- JP
- Japan
- Prior art keywords
- auger screw
- hydraulic cylinder
- pile
- stroke
- speed
- 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
Landscapes
- Piles And Underground Anchors (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は中掘工法における施
工管理装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction management device for a medium excavation method.
【０００２】[0002]
【従来の技術】従来から地中に基礎杭を造成する工法と
して、中空杭にオーガスクリューを挿入し、このオーガ
スクリューにより地盤を掘削しつつ中空杭を予定の深さ
まで建込み、その後中空杭の先端にセメントモルタルに
より球根を造成するようにする中掘工法が広く実施され
ている。2. Description of the Related Art Conventionally, as a method of constructing a foundation pile in the ground, an auger screw is inserted into a hollow pile, and the hollow pile is built up to a predetermined depth while excavating the ground with this auger screw. A medium excavation method is widely practiced in which a bulb is created by cement mortar at the tip.
【０００３】従来の上記中掘工法に用いられる装置（中
掘用杭打機）は、図５にその一例を示すように、リーダ
マスト１にワイヤ２により吊持されて昇降自在に装着さ
れたシーブブロック３に、駆動部昇降用油圧シリンダ４
を介してオーガスクリュー駆動装置５が昇降自在に支持
され、この駆動装置５の下部に杭キャップ６が装着され
た構造となっており、この杭キャップ６に保持された中
空杭７内にオーガスクリュー８が挿通されるようになっ
ている。As shown in the example of FIG. 5, an apparatus used for the above-mentioned conventional hollow excavation method (pile excavator for hollow excavation) is mounted on a leader mast 1 by a wire 2 so that it can be lifted and lowered. The sheave block 3 has a hydraulic cylinder 4 for raising and lowering the drive unit.
The auger screw drive device 5 is supported so as to be able to move up and down through the structure, and the pile cap 6 is attached to the lower part of the drive device 5, and the auger screw is installed in the hollow pile 7 held by the pile cap 6. 8 is inserted.
【０００４】上記オーガスクリュー８の先端のオーガヘ
ッド９により地盤を掘削しつつ中空杭７を所定の深さま
で建込んだのち、駆動部昇降用油圧シリンダ４によりオ
ーガスクリュー８のみを低速でかつ一定速度で上下動さ
せながらオーガヘッド９の先端に設けられた噴射口から
側方にセメントミルクを高圧で噴射し、中空杭７の先端
部分の地盤を拡大掘削するとともに掘削土砂とセメント
ミルクとを撹拌混合し、中空杭７の先端に球根を造成す
るようになされている。After the hollow pile 7 is built up to a predetermined depth while excavating the ground by the auger head 9 at the tip of the auger screw 8, only the auger screw 8 is driven at a low speed and a constant speed by the hydraulic cylinder 4 for raising and lowering the driving portion. Cement milk is jetted laterally from a jet port provided at the tip of the auger head 9 while being moved up and down by high pressure to expand and excavate the ground at the tip of the hollow pile 7 and mix the excavated soil and cement milk with stirring. Then, a bulb is formed at the tip of the hollow pile 7.
【０００５】[0005]
【発明が解決しようとする課題】しかるに上記従来の装
置では、前記駆動部昇降用油圧シリンダ４の伸縮速度を
一定に設定したとしても、中空杭７の先端地盤の硬軟
等、種々の条件によってばらつきが生じる。このように
伸縮速度にばらつきが生じると、オーガスクリュー８の
上下動が一定でなくなり、その結果、オーガヘッド９か
ら噴射されるセメントミルクのジェット流による掘削や
撹拌混合が不均一となって良好な球根を形成することが
不可能になるという問題を生じる。However, in the above-mentioned conventional apparatus, even if the expansion / contraction speed of the drive unit elevating hydraulic cylinder 4 is set constant, it varies depending on various conditions such as hardness of the tip ground of the hollow pile 7 and the like. Occurs. When the expansion and contraction speeds thus vary, the vertical movement of the auger screw 8 is not constant, and as a result, the cement milk jetted from the auger head 9 is not uniformly excavated and agitated by the jet flow, which is preferable. The problem arises that it becomes impossible to form bulbs.
【０００６】そこで従来では、駆動部昇降用油圧シリン
ダ４への作動油供給回路１０中に絞り弁１１を設けるよ
うにし、この絞り弁１１を手動により操作して上記油圧
シリンダ４への油量を調整し、速度を一定に保つように
なされているが、このような調整作業はきわめて煩雑で
あるばかりでなく、作業員の勘に頼ることになるので精
度的にも低いものとならざるを得なかった。またオーガ
スクリュー８の回転数を手動操作により一定に保つこと
についても同様なことがいえる。Therefore, conventionally, a throttle valve 11 is provided in the hydraulic oil supply circuit 10 for the hydraulic cylinder 4 for raising and lowering the drive portion, and the throttle valve 11 is manually operated to adjust the amount of oil to the hydraulic cylinder 4. It is adjusted to keep the speed constant, but such adjustment work is not only extremely complicated, but also depends on the intuition of the operator, so the accuracy is inevitably low. There wasn't. The same can be said for keeping the rotation speed of the auger screw 8 constant by manual operation.
【０００７】[0007]
【課題を解決するための手段】本発明は、中掘用杭打機
を用いての中掘工法において、中空杭の先端に均質な球
根を造成することができるようにすることを課題として
なされたもので、リーダマストに昇降自在に装着された
シーブブロックと、このシーブブロックに駆動部昇降用
油圧シリンダを介して昇降自在に垂設されたオーガスク
リュー駆動装置と、この駆動装置の下部に装着された杭
キャップとを具備する中掘用杭打機において、前記駆動
部昇降用油圧シリンダのストロークを検出するストロー
ク検出装置と、この検出装置により検出されたストロー
クに基づいて前記油圧シリンダの伸縮速度を算出する演
算装置と、この演算装置により算出された伸縮速度と予
め設定された伸縮速度とを比較して前記油圧シリンダへ
の作動油供給源である可変容量型ポンプの流量を制御す
る制御装置とを具有せしめたことにある。DISCLOSURE OF THE INVENTION The present invention has been made in view of the problem that it is possible to form a uniform bulb at the tip of a hollow pile in a medium excavation method using a pile excavator for medium excavation. A sheave block that is mounted on the leader mast so that it can be raised and lowered, an auger screw drive device that is vertically hung on this sheave block via a hydraulic cylinder for raising and lowering the drive unit, and is attached to the bottom of this drive device. In a pile driving machine for excavation, the stroke detecting device for detecting the stroke of the hydraulic cylinder for raising and lowering the drive part, and the expansion / contraction speed of the hydraulic cylinder based on the stroke detected by the detecting device. And the expansion / contraction speed calculated by this calculation device and the expansion / contraction speed set in advance are compared, and the operating oil supply source to the hydraulic cylinder is In that allowed androgynous and a control device for controlling the flow rate of that variable displacement pump.
【０００８】上記装置に加え、さらに球根の形成を良好
にするための手段として、前記オーガスクリュー駆動装
置を無段変速モータとし、前記オーガスクリューの回転
数を検出する回転数検出装置を備え、この検出装置によ
り検出されたオーガスクリューの回転数と予め設定され
た回転数とを比較して両者の値の差が予め設定された範
囲内になるよう前記無段変速モータの回転数を制御する
制御装置を備えしめることがより一層好ましい。In addition to the above-mentioned device, as a means for further improving the formation of the bulb, the auger screw drive device is a continuously variable motor, and a rotation speed detection device for detecting the rotation speed of the auger screw is provided. Control for comparing the number of revolutions of the auger screw detected by the detector with a preset number of revolutions and controlling the number of revolutions of the continuously variable motor so that the difference between the two values falls within a preset range. It is even more preferred to have a device.
【０００９】[0009]
【発明の実施の態様】以下、本発明を図面に示す実施の
形態を参照して説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments shown in the drawings.
【００１０】図１は本発明の一実施形態の全体構成を示
し、図２はその要部を拡大して示しており、中掘用杭打
機の基本構成は図５の従来のものと同様に、ベースマシ
ン１２に立設されるリーダマスト１の外側面のガイドレ
ール１ａにそってオーガスクリュー駆動装置５が昇降自
在に装着され、ワイヤ２により吊持されたシーブブロッ
ク３に駆動部昇降用油圧シリンダ４により支持されてい
る。またこのオーガスクリュー駆動装置５の下部には打
撃力を発生させるモンケン装置１３および中空杭７の上
端に被さる杭キャップ６が図示しないワイヤ等を介して
オーガスクリュー駆動装置５に吊持され、前記ガイドレ
ール１ａにそって昇降自在に装着されており、中空杭７
の建込み時には中空杭７上に乗るようになっている。そ
して前記モンケン装置１３および杭キャップ６、中空杭
７にはオーガスクリュー８が挿通自在とされている。FIG. 1 shows the entire construction of an embodiment of the present invention, and FIG. 2 shows an enlarged main part thereof. The basic construction of a pile excavator for medium excavation is the same as the conventional construction of FIG. In addition, an auger screw driving device 5 is mounted so as to be vertically movable along a guide rail 1a on the outer surface of the leader mast 1 which is erected on the base machine 12, and a sheave block 3 suspended by a wire 2 is used for lifting the driving portion. It is supported by the hydraulic cylinder 4. Further, a monken device 13 for generating a striking force and a pile cap 6 covering the upper ends of the hollow piles 7 are hung on the auger screw drive device 5 via a wire or the like (not shown) below the auger screw drive device 5, It is mounted so that it can move up and down along the rail 1a, and the hollow pile 7
At the time of building, the hollow pile 7 is mounted. An auger screw 8 can be inserted into the monken device 13, the pile cap 6 and the hollow pile 7.
【００１１】前記オーガスクリュー駆動装置５には、図
２に示すように、前記駆動部昇降用油圧シリンダ４のス
トロークを検出するストローク検出装置１４が設けられ
ている。このストローク検出装置１４は、図示の実施形
態ではシーブブロック３の下部に結着された検出用ワイ
ヤ１５がポテンショメータ１６の回転輪を経由してワイ
ヤドラム１７に巻取られ、オーガスクリュー駆動装置５
の上下方向の移動量を検出用ワイヤ１５の巻出し量とし
てとらえ、ポテンショメータ１６によりその長さを検出
するようになされている。なおこのストローク検出装置
１４は、ワイヤを使用したものに限らず、オーガスクリ
ュー駆動装置５の移動量を回転体の回転数として取出
し、その回転をパルス信号によりカウントして検出する
ものなど、適宜な手段を採用することができる。As shown in FIG. 2, the auger screw drive device 5 is provided with a stroke detection device 14 for detecting the stroke of the hydraulic cylinder 4 for raising and lowering the drive portion. In the stroke detection device 14, in the illustrated embodiment, the detection wire 15 bound to the lower portion of the sheave block 3 is wound around the wire drum 17 via the rotary wheel of the potentiometer 16, and the auger screw drive device 5 is provided.
The amount of vertical movement of is detected as the unwinding amount of the detection wire 15, and the length thereof is detected by the potentiometer 16. The stroke detecting device 14 is not limited to a device using a wire, but may be a device that takes out the amount of movement of the auger screw driving device 5 as the number of rotations of the rotating body and counts the rotation by a pulse signal to detect it. Means can be employed.
【００１２】またオーガスクリュー駆動装置５には、オ
ーガスクリュー８の回転数を検出する回転数検出装置１
８が設けられている。この回転数検出装置１８として
は、例えば当該駆動装置５内のモータ（無段変速モー
タ、インバータモータ）の出力軸にロータリエンコーダ
を取付け、これにより出力軸の回転数を検出するものな
どが用いられる。The auger screw driving device 5 includes a rotation speed detecting device 1 for detecting the rotation speed of the auger screw 8.
8 are provided. As the rotation speed detection device 18, for example, a device in which a rotary encoder is attached to an output shaft of a motor (a continuously variable transmission motor, an inverter motor) in the drive device 5 and the rotation speed of the output shaft is detected by this is used. .
【００１３】前記ストローク検出装置１４には、周波数
変換器１９、インバータ２０を介して制御装置２１（Ｃ
ＰＵ）が接続され、この制御装置２１には、前記ストロ
ーク検出装置１４からの検出信号１４ａ、前記回転数検
出装置１８からの検出信号１８ａがそれぞれ入力され
る。The stroke detecting device 14 includes a control device 21 (C) via a frequency converter 19 and an inverter 20.
PU) is connected, and the detection signal 14a from the stroke detection device 14 and the detection signal 18a from the rotation speed detection device 18 are input to the control device 21, respectively.
【００１４】前記制御装置２１は、前記ストローク検出
装置１４からの検出信号１４ａに基づき前記駆動部昇降
用油圧シリンダ５の伸縮速度を算出する演算装置を備
え、この演算装置により算出された伸縮速度と予め設定
された伸縮速度とを比較して前記駆動部昇降用油圧シリ
ンダ４への作動油供給源である可変容量型ポンプ２２の
モータ２３を制御して流量を調整する機能を有してい
る。なおこのモータ２３に代えて油圧シリンダ等のアク
チュエータであってもよい。The control device 21 includes an arithmetic unit for calculating the expansion / contraction speed of the hydraulic cylinder 5 for raising / lowering the drive section based on the detection signal 14a from the stroke detection device 14, and the expansion / contraction speed calculated by this arithmetic device. It has a function of comparing a preset expansion / contraction speed and controlling the motor 23 of the variable displacement pump 22 which is a supply source of hydraulic oil to the drive unit lifting hydraulic cylinder 4 to adjust the flow rate. An actuator such as a hydraulic cylinder may be used instead of the motor 23.
【００１５】また前記回転数検出装置１８からの検出信
号１８ａに基づきオーガスクリュー８の回転数と予め設
定された回転数とを比較して両者の値の差が予め設定さ
れた範囲内になるようモータ（無段変速モータ）の回転
数を制御する機能を有している。Further, the number of revolutions of the auger screw 8 is compared with a preset number of revolutions based on the detection signal 18a from the number of revolutions detector 18 so that the difference between the two values falls within a preset range. It has a function of controlling the rotation speed of a motor (continuously variable transmission motor).
【００１６】前記モンケン装置１３を含む杭キャップ６
は、図示しないが通常のようにワイヤにより下方へ引き
下げる力が与えられるようになっている。Pile cap 6 including the Monken device 13
Although not shown in the figure, the wire is normally applied with a downward pulling force.
【００１７】したがって中空杭７の建込み時には、シー
ブブロック３を上昇させてオーガスクリュー駆動装置５
およびこれにワイヤにより吊持されたモンケン装置１
３、杭キャップ６を上昇させ、杭キャップ６の下にオー
ガスクリュー８を挿通した中空杭７を設置してシーブブ
ロック３を下げ、オーガスクリュー８にモンケン装置１
３および杭キャップ６を通したのちオーガスクリュー８
の上端をオーガスクリュー駆動装置５の出力軸に連結す
るとともに中空軸７の上端に杭キャップ６を被せ、オー
ガスクリュー８を回転駆動してその下端のオーガヘッド
９により地盤を掘削しつつ中空杭７を自重あるいはモン
ケン装置１３により叩打して圧入して行き、所定の深さ
まで建込む（図３（Ａ））。Therefore, when the hollow pile 7 is installed, the sheave block 3 is raised to raise the auger screw drive device 5.
And a monken device 1 suspended by a wire on this
3. The pile cap 6 is lifted up, the hollow pile 7 in which the auger screw 8 is inserted is installed under the pile cap 6, the sheave block 3 is lowered, and the auger screw 8 is attached to the Monken device 1
3 and pile cap 6 and then auger screw 8
The upper end of the hollow shaft 7 is connected to the output shaft of the auger screw drive device 5, the upper end of the hollow shaft 7 is covered with a pile cap 6, and the auger screw 8 is rotationally driven to excavate the ground by the auger head 9 at the lower end of the hollow pile 7. Is struck by its own weight or by the Monken device 13 to be press-fitted, and is built up to a predetermined depth (FIG. 3 (A)).
【００１８】中空杭７が所定の深度に到達したら中空杭
７の圧入を停め、オーガスクリュー８を所定の回転数で
回転させながら低速かつ一定速度で上下動させ、オーガ
ヘッド９の下端の噴射口から側方へ向け高圧水を噴射
し、中空杭７の下端より下位の周囲の地盤を掘削する
（図３（Ｂ）→（Ｃ））。When the hollow pile 7 reaches a predetermined depth, the press-fitting of the hollow pile 7 is stopped, and the auger screw 8 is moved up and down at a low speed and a constant speed while rotating at a predetermined rotation speed, and the injection port at the lower end of the auger head 9 is ejected. High-pressure water is jetted laterally from the side to excavate the surrounding ground below the lower end of the hollow pile 7 (FIG. 3 (B) → (C)).
【００１９】オーガスクリュー８の上下動を繰返して高
圧水による掘削径を徐々に拡大し、その後高圧水をセメ
ントミルクに代えてセメントミルクと掘削土砂との撹拌
混合を行う（図３（Ｄ））。これにより中空杭７の下端
に大径の球根が形成される（図３（Ｅ））。The auger screw 8 is repeatedly moved up and down to gradually expand the excavation diameter by high-pressure water, and then the high-pressure water is replaced with cement milk, and the cement milk and excavated earth and sand are agitated and mixed (FIG. 3 (D)). . As a result, a large diameter bulb is formed at the lower end of the hollow pile 7 (FIG. 3 (E)).
【００２０】上記のようにして球根を造成する際に良好
な球根が形成されるよう下記のような制御が行われる。
その球根造成作業（根固め）を図４に示すフローチャー
トを参照して説明する。 (1) 先ず中空杭７の杭径、施工地盤等の諸条件に基づ
いて、オーガスクリュー８の上下動速度、回転数、上下
動繰返し回数、球根長さ等を初期設定する（ステップＳ
1 ）。 (2) 駆動部昇降用油圧シリンダ４の伸長速度とオーガ
スクリュー８の回転数の制御を開始する（ステップ
Ｓ2 ）。 (3) 駆動部昇降用油圧シリンダ４に伸長または短縮の
指令が出され、オーガスクリュー８の回転数を低速（例
えば１０ｒｐｍ）にする（ステップＳ3 ）。 (4) 駆動部昇降用油圧シリンダ４の伸長速度の制御を
行う（ステップＳ4 ）。 (5) 駆動部昇降用油圧シリンダ４の伸長速度が予め設
定された速度の範囲内か否かの比較を行う（ステップＳ
5 ）。 (6) 駆動部昇降用油圧シリンダ４の伸長速度が地盤の
硬軟等の理由により上記設定範囲から外れている場合
は、該油圧シリンダ４への圧油を供給している可変容量
型ポンプ２２の吐出流量を油圧シリンダ４の伸縮速度が
前記設定速度の範囲内に戻るよう増減する（ステップＳ
6 ）。 (7) オーガスクリュー８の回転数が予め設定された回
転数の範囲内か否かの比較を行う（ステップＳ7 ）。 (8) オーガスクリュー８の回転数が設定範囲から外れ
ている場合は、インバータ２０の周波数を増減させてモ
ータの回転数を変え、設定範囲内に戻るよう制御する
（ステップＳ8 ）。 (9) 伸縮速度および回転数の上記判定後、オーガヘッ
ド９の下端が球根の上下方向長さに達しているかを判断
し（ステップＳ9 ）、オーガヘッド９が球根造成部の上
下端に至るまで上記ループを繰返す。 (10) オーガヘッド９が球根造成部の上下端に達した場
合は、上下動を所定回数（例えば３回）行ったかを判断
し（ステップＳ10）、これが満たされるまで上記制御を
繰返す。 (11) 上下動が所定回数に達したとき制御が終了となる
（ステップＳ11）。The following control is performed so that a good bulb is formed when the bulb is formed as described above.
The bulb forming work (root consolidation) will be described with reference to the flowchart shown in FIG. (1) First, based on various conditions such as the pile diameter of the hollow pile 7 and the construction ground, the vertical movement speed of the auger screw 8, the number of rotations, the number of vertical movement repetitions, the bulb length, etc. are initialized (step S).
1 ). (2) Start the control of the extension speed of the drive unit lifting hydraulic cylinder 4 and the rotation speed of the auger screw 8 (step S 2 ). (3) A command for extension or shortening is issued to the hydraulic cylinder 4 for raising and lowering the drive unit, and the rotation speed of the auger screw 8 is set to a low speed (for example, 10 rpm) (step S 3 ). (4) for controlling the extension rate of the driving part moving hydraulic cylinder 4 (step S 4). (5) It is compared whether or not the extension speed of the drive unit elevating hydraulic cylinder 4 is within a preset speed range (step S
5 ). (6) If the extension speed of the hydraulic cylinder 4 for raising and lowering the drive unit is out of the above set range due to the hardness of the ground, etc., the variable displacement pump 22 that supplies pressure oil to the hydraulic cylinder 4 The discharge flow rate is increased or decreased so that the expansion / contraction speed of the hydraulic cylinder 4 returns to within the set speed range (step S).
6 ). (7) rotational speed of the auger screw 8 makes a comparison of whether a preset range of the rotational speed (step S 7). (8) If the number of revolutions of the auger screw 8 is out of the set range, varying the rotational speed of the motor by increasing or decreasing the frequency of the inverter 20 is controlled to return to within the set range (Step S 8). (9) After the expansion / contraction speed and the number of rotations are determined, it is determined whether the lower end of the auger head 9 has reached the vertical length of the bulb (step S 9 ), and the auger head 9 reaches the upper and lower ends of the bulb forming portion. Repeat the above loop until. (10) When the auger head 9 reaches the upper and lower ends of the bulb reclamation unit determines if with a predetermined number of times the vertical movement (for example, three times) (step S 10), repeats the above control until it is satisfied. (11) vertical movement control is terminated when it reaches a predetermined number of times (Step S 11).
【００２１】[0021]
【発明の効果】以上説明したように本発明によれば、中
空杭の下端に球根を造成するときオーガスクリューを低
速かつ一定速度で上下動させることが自動的になされる
ので、径大の球根部の掘削はもちろん、掘削土砂とセメ
ントミルクとの撹拌混合を十分にしかも精度良く行うこ
とができる。As described above, according to the present invention, when the bulb is formed at the lower end of the hollow pile, the auger screw is automatically moved up and down at a low speed and at a constant speed. In addition to excavating the part, the excavated soil and the cement milk can be sufficiently agitated and mixed with accuracy.
【００２２】また請求項２に記載の発明によれば、上記
球根造成時にオーガスクリューを常に一定回転数で回転
させることができるので、請求項１に記載の発明よりさ
らに球根部の掘削および掘削土砂とセメントミルクとの
撹拌混合効果を高めることができる。According to the invention described in claim 2, since the auger screw can be always rotated at a constant number of revolutions at the time of forming the bulb, excavation of the bulb portion and excavated earth and sand are further carried out than in the invention according to claim 1. It is possible to enhance the stirring and mixing effect of the cement milk with the cement milk.
【図１】本発明の一実施形態の全体構成例を示す側面
図。FIG. 1 is a side view showing an example of the overall configuration of an embodiment of the present invention.
【図２】同、要部の拡大図。FIG. 2 is an enlarged view of the main part of the same.
【図３】（Ａ）〜（Ｅ）は球根造成過程を示す説明図。3A to 3E are explanatory views showing a bulb forming process.
【図４】動作のフローチャート。FIG. 4 is a flowchart of operation.
【図５】従来の技術を示す側面図。FIG. 5 is a side view showing a conventional technique.
１ リーダマスト ２ ワイヤ ３ シーブブロック ４ 駆動部昇降用油圧シリンダ ５ オーガスクリュー駆動装置 ６ 杭キャップ ７ 中空杭 ８ オーガスクリュー ９ オーガヘッド １３ モンケン装置 １４ ストローク検出装置 １６ ポテンショメータ １８ 回転数検出装置 ２２ 可変容量型ポンプ 1 Leader Mast 2 Wire 3 Sheave Block 4 Hydraulic Cylinder for Elevating Drive Unit 5 Auger Screw Drive Device 6 Pile Cap 7 Hollow Pile 8 Auger Screw 9 Auger Head 13 Monken Device 14 Stroke Detection Device 16 Potentiometer 18 Rotation Speed Detection Device 22 Variable Capacity Type pump
Claims (2)
ブブロックと、このシーブブロックに駆動部昇降用シリ
ンダを介して昇降自在に垂設されたオーガスクリュー駆
動装置と、この駆動装置の下部に装着された杭キャップ
とを具備する中掘用杭打機において、前記駆動部昇降用
油圧シリンダのストロークを検出するストローク検出装
置と、この検出装置により検出されたストロークに基づ
いて前記油圧シリンダの伸縮速度を算出する演算装置
と、この演算装置により算出された伸縮速度と予め設定
された伸縮速度とを比較して前記油圧シリンダへの作動
油供給源である可変容量型ポンプの流量を制御する制御
装置とを具有することを特徴とする中掘工法における施
工管理装置。1. A sheave block mounted on a leader mast so as to be able to move up and down, an auger screw drive device vertically mounted on the sheave block via a drive unit raising and lowering cylinder, and mounted on a lower portion of the drive device. In a pile driving machine for excavation, the stroke detecting device for detecting the stroke of the hydraulic cylinder for raising and lowering the drive part, and the expansion / contraction speed of the hydraulic cylinder based on the stroke detected by the detecting device. And a controller for controlling the flow rate of the variable displacement pump, which is a hydraulic oil supply source to the hydraulic cylinder, by comparing the expansion / contraction speed calculated by the calculation device with a preset expansion / contraction speed. A construction management device for a medium excavation method, which comprises:
モータとし、前記オーガスクリューの回転数を検出する
回転数検出装置を備え、この検出装置により検出された
オーガスクリューの回転数と予め設定された回転数とを
比較して両者の値の差が予め設定された範囲内になるよ
う前記無段変速モータの回転数を制御する制御装置を備
えている請求項１記載の中掘工法における施工管理装
置。2. The auger screw driving device is a continuously variable motor, and a rotation speed detection device for detecting the rotation speed of the auger screw is provided, and the rotation speed of the auger screw detected by the detection device is preset. The construction management in the medium excavation method according to claim 1, further comprising a control device for comparing the number of revolutions and controlling the number of revolutions of the continuously variable motor so that the difference between the two values falls within a preset range. apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11610496A JP3759235B2 (en) | 1996-05-10 | 1996-05-10 | Construction management equipment for medium digging method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11610496A JP3759235B2 (en) | 1996-05-10 | 1996-05-10 | Construction management equipment for medium digging method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09302656A true JPH09302656A (en) | 1997-11-25 |
| JP3759235B2 JP3759235B2 (en) | 2006-03-22 |
Family
ID=14678804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11610496A Expired - Fee Related JP3759235B2 (en) | 1996-05-10 | 1996-05-10 | Construction management equipment for medium digging method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3759235B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007031977A (en) * | 2005-07-22 | 2007-02-08 | Nippon Sharyo Seizo Kaisha Ltd | Pile driver |
-
1996
- 1996-05-10 JP JP11610496A patent/JP3759235B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007031977A (en) * | 2005-07-22 | 2007-02-08 | Nippon Sharyo Seizo Kaisha Ltd | Pile driver |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3759235B2 (en) | 2006-03-22 |
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