JPH04131421A - Constructing apparatus for continuous wall in ground - Google Patents
Constructing apparatus for continuous wall in groundInfo
- Publication number
- JPH04131421A JPH04131421A JP25268790A JP25268790A JPH04131421A JP H04131421 A JPH04131421 A JP H04131421A JP 25268790 A JP25268790 A JP 25268790A JP 25268790 A JP25268790 A JP 25268790A JP H04131421 A JPH04131421 A JP H04131421A
- Authority
- JP
- Japan
- Prior art keywords
- tower
- stirring
- ground
- shaft
- continuous wall
- 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
- 238000003756 stirring Methods 0.000 claims description 67
- 238000010276 construction Methods 0.000 claims description 38
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000002689 soil Substances 0.000 claims description 4
- 230000014759 maintenance of location Effects 0.000 claims 1
- 238000007789 sealing Methods 0.000 abstract description 2
- 230000008023 solidification Effects 0.000 abstract 1
- 238000007711 solidification Methods 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 11
- 230000035515 penetration Effects 0.000 description 5
- 230000003028 elevating effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Abstract
Description
本発明は、ビル建設の基礎工事等において短工期かつ低
廉な地中連続壁構築工法として近年普及著しい現位置土
砂混合工法に使用する装置に関し、更に詳しくは、撹拌
羽根を有す多連の撹拌軸を地盤に回転貫入しながら撹拌
軸先端より硬化剤や止水剤を吐出して土と混合撹拌し、
所定の深さに到達後、回転撹拌しながら引抜き、１本の
混合撹拌柱を施工した後、一部重複して隣接する混合撹
拌柱を施工し、これを繰返して土留めや止水のための連
続壁を地中に構築する装置に関する、The present invention relates to a device used in the in-situ soil mixing method, which has become popular in recent years as a short construction period and inexpensive underground continuous wall construction method in foundation work for building construction, etc. While the shaft rotates and penetrates into the ground, hardening agents and water-stopping agents are discharged from the tip of the stirring shaft, mixed with the soil, and stirred.
After reaching the specified depth, pull it out while rotating and stirring, construct one mixing stirring column, then construct an adjacent mixing stirring column with some overlap, and repeat this to retain the earth and stop water. Concerning a device for constructing a continuous wall underground,
従来この種の装置は、無限軌道を有す走行装置及び、エ
ンジンや油圧機器や制御操作部等を搭載して走行装置上
で旋回可能となした旋回部からなるベースマシーンに、
下部を旋回部の前部で支持され、かつ上部を旋回部の後
部と２本のバックステーで連結して支持されるタワーを
装着し、さらにタワー前部には撹拌軸回転駆動部や横−
例に配した多連の撹拌軸及び撹拌軸を抱えて回転自由に
支持するシャフトガイドを、タワー頂部のトップシーブ
からワイヤーロープによりタワーに案内されて昇降自在
に懸垂している。
従来装置では施工において、地中に貫入した撹拌軸を引
抜く際に生じる引抜き反力を、タワーを介してベースマ
シーンが受けるため、撹拌軸の弓抜き工程で前方への転
倒を生じない重量を有す大型のベースマシーンが必要と
なって装置が大型化することから、施工現場へは装置を
分割して搬入し、施工現場で各部品の装着や、幾多のワ
イヤーロープの掛は通しなどの組立て作業を要し、施工
終了後の分解作業も要すことから施工能率が低いと共に
、施工現場は、少なくとも撹拌駆動部や撹拌軸を仮置き
し、ベースマシーン及び装置の組立用クレーンを配し、
かつ分割して施工現場に搬入したタワーを地上に倒した
状態で組立てるための広さを必要とする。
従って、広い道路から入り込んだ小規模ビルの建設現場
では、ベースマシーンを積載した大型トレーラ−の通行
が可能な導入路を確保できないとか、装置の組立てに要
す施工現場面積を有さないこと等から、従来装置では現
位置土砂混合工法による地中連続壁の施工ができない欠
点があった。
さらに従来装置では、ベースマシーンの旋回中心とタワ
ーとの距離変更は、前述転倒の危険性があることから小
範囲に制限され、かつタワーに装着した撹拌駆動部を懸
垂するワイヤーロープがタワー頂部に固定したトップシ
ーブを介してベースマシーンに搭載したウィンチに連結
しているため、タワー自体の旋回も該ワイヤーロープが
トップシーブで脱索する危険性があることがら小範囲に
制限される。
従って、ベースマシーンの移動なくして施工できる範囲
は極めて小さく、順次連続壁の施工を行う上で頻繁にベ
ースマシーンの移動を要し、都度施工位置へ測量により
撹拌軸の誘導位置決め作業を要することから施工能率が
悪く、がっ、大型装置の頻繁な移動に伴い施工現場の安
全性が損われる欠点があった。Conventionally, this type of equipment consists of a base machine consisting of a traveling device with an endless track, and a swing section that is equipped with an engine, hydraulic equipment, control operation unit, etc. and can rotate on the traveling device.
A tower is installed, the lower part of which is supported by the front of the revolving part, and the upper part of which is connected to the rear of the revolving part by two backstays.
The multiple stirring shafts arranged in the example and the shaft guide that holds and freely supports the stirring shafts are guided from the top sheave at the top of the tower to the tower by a wire rope and suspended so as to be able to rise and fall freely. With conventional equipment, during construction, the base machine receives the pull-out reaction force generated when pulling out the stirring shaft that has penetrated the ground through the tower. As the equipment becomes larger due to the need for a large base machine with a large base machine, the equipment must be delivered in parts to the construction site, where each part must be attached and the numerous wire ropes must be threaded. Construction efficiency is low because assembly work is required, and disassembly work is also required after construction is complete. At the construction site, at least the stirring drive unit and stirring shaft are temporarily placed, and a crane for assembling the base machine and equipment is arranged. ,
In addition, a space is required for assembling the tower, which has been delivered to the construction site in parts, and is laid down on the ground. Therefore, at the construction site of a small building that is accessed from a wide road, it may not be possible to secure an entrance road that allows the passage of large trailers loaded with base machines, or the construction site may not have enough area to assemble the equipment. Therefore, conventional equipment had the disadvantage that it was not possible to construct underground continuous walls using the in-situ earth and sand mixing method. Furthermore, with conventional equipment, changing the distance between the center of rotation of the base machine and the tower is limited to a small range due to the risk of tipping over, and the wire rope that suspends the stirring drive unit attached to the tower is attached to the top of the tower. Since the tower is connected to a winch mounted on a base machine via a fixed top sheave, the swing of the tower itself is limited to a small range due to the risk of the wire rope slipping out of the top sheave. Therefore, the area that can be constructed without moving the base machine is extremely small, and it is necessary to frequently move the base machine when constructing continuous walls one after another, and it is necessary to guide and position the stirring shaft by surveying the construction location each time. Construction efficiency was poor, and safety at the construction site was compromised due to frequent movement of large equipment.
【問題点を解決するための手段１
撹拌駆動部や撹拌軸を昇降案内するタワーの下端を地面
または地面に敷設した基台に支持させ。
上１はタワーの旋回手段を介してベースマシーンなるト
ラッククレーンまたはホイールクレーンのブームに揺動
自在に連結する。基台面には撹拌軸の貫入打設間隔に配
した複数の角穴を配し、タワー下端は基台面の角穴に差
込み可能な角錘形状とする。また旋回手段の旋回中心部
を中空とし、該中空部に撹拌駆動部やシャフトガイドを
懸垂して昇降せしめるワイヤーロープを貫通させる構造
とする。
【発明の実施例】
以下、本発明をさらに具体的に明らかにするために、そ
の実施例を図面に基づいて詳細に説明する。
第１図は施工可能な状態にある実施例の装置全体シボし
、撹拌羽根を有す多連の撹拌軸１に伝達軸２を介して回
転力を与える撹拌駆動部３は、上部にシーブを有すハン
ガー４により撹拌駆動部昇降ワイヤーロープ５で懸垂し
ている。
多連の撹拌軸１を抱えて回転自在に支えるシャフトガイ
ド６は、シャフトガイド昇降ワイヤーロープ７で懸垂し
、シャフトガイド６及び撹拌駆動部３はタワー８に案内
されて個々に昇降する。多分割式のタワー８は、下端を
基台１２で支持され。
上部は旋回手段１３を介してベースマシーンとなるホイ
ールクレーン１７のブーム１４先端にビン１５により、
前後方向に揺動可能、かつビン１５以下の装置全体を懸
垂可能に連結している。タワー８は分割部フランジをボ
ルト締めにより連結し、該フランジ後部にはビンによる
仮連結を行うためのビンブラケット９を有し、さらに最
上部タワーには前述シャフトガイド昇降ワイヤーロープ
７をタワーの後方に貫通させる貫通穴１０及び転向シー
ブ１１を配すと共に、後述ベースマシーンの走行移動時
にハンガー４登タワーに連結するためのブラケット１６
を有している。
本装置による施工は、撹拌軸が所定の打設位置となすよ
う装置を設定した後、撹拌軸１を回転して撹拌軸先端よ
り吐出する硬化剤や止水剤を土と混合撹拌しながら、主
として撹拌駆動部３の重量により地中に貫入する。所定
の深さに到達後もさらに混合撹拌しながら、ワイヤーロ
ープ５の巻込みにより撹拌駆動部と共に撹拌軸１を上昇
せしめて引抜き、１本の施工柱を築く０貫入力が不足す
る場合は、ベースマシーンに備えたウィンチまたはタワ
ーにウィンチを備えて、ワイヤーロープにより撹拌駆動
部を下方に引降す強制貫入装置を備えてもよい。
第２図は、施工可能な状態にある他の実施例の装置全体
を示し、撹拌羽根を有す多連の撹拌軸１は多角形の外周
形状有す伝達軸２１を介して撹拌駆動部２２か６回転力
及び地中への貫入引抜力を得る。撹拌駆動部２２は、回
転出力軸の回転中心を中空にして伝達軸２】７を貫通さ
せ、該回転出力軸に一体とした複数のローラーを多角形
外周の各面に夫々あてがい１回転力を伝達軸２２に伝達
しながら伝達軸の軸芯方向の移動、すなわち昇降自由と
なす構造とし、かつ撹拌軸２０の貫入力及び引抜力とな
る撹拌駆動部の自重及び攪ｆ＋駆動部昇降ワイヤーロー
プ２３の巻上げにより得る撹拌駆動部の上昇力を伝達軸
へ伝達するために、前述回転出力軸に貫通した伝達軸の
軸芯方向の移動を任意に束縛する手段を備えている。ま
たホイールクレーン１７のブーム１４の頂部には油圧シ
リンダー２５の伸縮により任意に起伏する可倒ジブ２６
を備え、該ジブに設けたシーブへ、先端にフックな有し
てベースマシーンのウィンチに巻取られるワイヤーロー
プ２７を掛けている。
なお、他の構成は第１図に示す実施例と同じであり、前
述強制貫入装置製備えてもよい。
第３図は、タウ−下部及び基台を示し、基台３１はタワ
ー下部の角錐部３２を差し込む複数の角穴３３を配すと
共に、撹拌軸１の引抜反力や装置の重量など係る荷重を
支えうる強度を有して地面に敷設されている。該角穴は
多連の撹拌軸１による施工柱３５が所定の間隔３６．方
向及び配列となすように配している。
複数個の基台を順次敷替えしながら施工すれば高能率で
ある。
第４図はタワーの旋回手段を含むタワー上部の断面を示
し、旋回中心部を中空とした旋回ベアリング４１の下部
に旋回フレーム４２をボルトにより固接し、旋回ベアリ
ング４１の上部には旋回ブラケット４３をボルトにより
固接している。旋回ベアリング４１の外輪外周を歯車と
し、内軸はボール４４のほぼ中間で上下に分割し、ボル
ト４５で上下の内輪を固接している。旋回ブラケット４
３の頂部でベースマシーンのブームトップブラケット４
６とビン４７でブームの前後方向に揺動自在に連結し、
旋回ブラケットのビン位置は施工可能な状態にあるビン
４７以下の装置を、自由懸垂した場合にタワー下端が若
干前方に出る状態、すなわちビン４７以下の装置が若干
後方に倒れた姿勢となしている。ベースマシーンに搭載
したウィンチから多列のトップシーブ４８及び旋回ブラ
ケットシーブ４９に掛は通された複数本のワイヤーロー
プの内、１本はワイヤーロープが無負荷時にバネ５０の
作用で起き上がって５本装置の最前端以後に収納できる
可倒式シーブ５１を介して先端にフック５２を有した雑
吊りワイヤーロープ５３とし、本装置の組立てや分解及
び未硬化の施工柱に補強材となす形鋼の建て込みなどに
使用する。
但し、第２図に示す実施例では、可倒ジブ先端のシーブ
に掛は通したワイヤーロープで上記作業を行うため、可
倒シーブ５１は備えていない、旋回フレーム前部に配し
たシーブ５４と撹拌駆動部に吊下げるハンガー４のシー
ブ５５に掛は通された撹拌駆動部昇降ワイヤーロープ５
及びシャフトガイド昇降ワイヤーロープ７は旋回ベアリ
ング４１の中空部のほぼ旋回中心を上下に貫通して前述
旋回ブラケットシーブ４９及びトップシーブ４８を介し
てベースマシーンに搭載したウィンチへ夫々係接されて
いる。
第５図は第４図のａ矢視図で、外周を歯車とした旋回ベ
アリングの外輪外周歯部に噛合う小歯車６１を出力軸に
有す減速機付電動機６２を旋回フレーム４２の側面に配
して、該電動機の駆動により旋回フレーム以下の装置の
旋回を行う。なお、減速機付電動機６２は油圧モーター
としてもよい。
以上詳記した実施例の装置において、施工中に発生する
撹拌軸の引抜反力を地面が負荷するため、従来装置のベ
ースマシーンに比べて軽量小型であるトラッククレーン
やホイールクレーンをベースマシーンとすることが可能
となったことから、装置全体が小型軽量化し、かつブー
ムの伸縮及び起伏によってベースマシーンと施工位置と
の距離変更範囲が拡大したこと、旋回手段の旋回中心に
係るワイヤーロープを貫通させたことから、旋回範囲も
拡大したことによって第６図に示すようにベースマシー
ン１７を１ケ所に固定してブーム１４の旋回、伸縮、起
伏動作及び旋回手段１３の駆動により広い範囲の施工を
可能にした。また、タワー下端を角錘形状とし、旋回手
段、タワー、撹拌駆動部、伝達軸、撹拌軸等からなるブ
ーム先端ビン以下の装置部（以後撹拌装置と称す）を若
干後方に傾倒した状態に自由懸垂でき、かつ角穴を有す
基台を設けたことから、隣接したビルに極めて接近して
施工を行う場合も、撹拌装置を自由懸垂してタワー下端
の角錐部を、予め所定の位置に敷設した基台の角穴に合
せ置き、ブームを伸ばしてタワーを鉛直に起こせば隣接
したビルに干渉する危険もなく、速やかに撹拌装置の位
置決めができると共に、基台の使用により測量作業を軽
減した。
さらに、本装置の分解手順を第１図を用いて次に述べる
。
０） シャフトガイド６を地上に降した後、シャフト
ガイド昇降ワイヤーロープ７の連結を外し、ブーム１４
を起して撹拌装置を持上げて、シャフトガイド６を撹拌
軸の下方に抜き外す。
（２） 多分割式撹拌軸１の最下段撹拌軸上部に転倒防
止のための前述雑品りワイヤーロープを掛けた後、最下
段撹拌軸を切り放し、雑吊りワイヤーロープを除々にゆ
るめて地上に倒す、撹拌駆動部３と共に撹拌軸１及び伝
達軸２を下降し、前記作業を順次繰返して撹拌軸及び伝
達軸振分解するい
（３） 撹拌軸１及び伝達軸２の分解後に撹拌駆動部３
を地面またはトラック上に降し、ハンガー４との連結を
外した後、前記（１）項に記載したシャフトガイド６の
取外し要領で撹拌駆動部を外す。
（４） タワー８の下端を地面に与け、シャフトガイド
昇降用ワイヤーロープ７を最下段タワーの前部に掛けて
張り、タワー分割部フランジのボルトを外した後昇降用
ワイヤー〇−プ７をゆるめて、分割部フランジ後部をビ
ン連結した状態でブームを倒し伸ばす操作によりタワー
を前述ビン部で折り曲げて最下段タワーを地上に倒す、
その後。
前述ビンを外してタワーを切り放し、ブームを旋回して
若干場所を変えながら前記作業を順次繰返し、最上段タ
ワーを残してタワーを分解する。
（５） ハンガー４を最上段タワーのブラケット１６に
取付けた後、シャフトガイド昇降ワイヤーロープ７を最
上段タワーの下部に設けた転向シーブ１１と貫通穴１０
を通してブーム１４に連結し、該ワイヤーロープを係る
ウィンチで巻込むことにより、最上段タワー、旋回手段
１３及びハンガー４を一体でブーム４の下方に引寄せる
と共にブームを倒せば第７図に示す走行可能な姿勢とな
る。
従って、本装置の分解及び逆の手順による組立に別のク
レーンを必要とせず１分解組立時に煩雑な幾多のワイヤ
ーロープの掛は通しや外し作業を不要とし、さらに自走
可能なトラッククレーンやホイールクレーンをベースマ
シーンとなし得たため、大型トレーラ−によるベースマ
シーンの運搬を不要とした。
ｒ発明の効果］
以上詳記した本発明は、地中連続Ｍ施工装置の小型軽量
化をなし得たものであるから、従来装置で施工し得なか
った小規模ビルの建設現場等、狭小地の現位置土砂混合
工法による地中連続壁構築を可能にした。また、ベース
マシーンを固定して広範囲な施工を可能とし、測量作業
を軽減し、装置の組立分解作業を簡略化し、自走可能な
ベースマシーンの使用を可能にしたことから、工期及び
工費の低減を実現した。さらに、隣接したビルに極めて
接近したこの種の施工製安全になし得る構造とし、かつ
ベースマシーンの頻繁な移動を不要としたことから施工
安全性も向上した。[Means for solving the problem 1: The lower end of the tower that guides the stirring drive unit and stirring shaft up and down is supported on the ground or on a base set on the ground. The upper part 1 is swingably connected to the boom of a truck crane or a wheel crane, which is a base machine, through a turning means of the tower. A plurality of square holes are arranged on the base surface at the intervals at which the stirring shafts are inserted, and the lower end of the tower is shaped like a square pyramid so that it can be inserted into the square holes on the base surface. Further, the center of rotation of the rotation means is hollow, and the stirring drive unit and the shaft guide are suspended in the hollow portion, and a wire rope for raising and lowering the stirring drive unit and the shaft guide is passed through the hollow portion. DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to clarify the present invention more specifically, embodiments thereof will be described in detail below with reference to the drawings. Fig. 1 shows the entire apparatus of the embodiment in a ready-to-work state, and the stirring drive section 3, which applies rotational force to the multiple stirring shafts 1 each having stirring blades via the transmission shaft 2, has a sheave on the top. The stirring drive unit is suspended by a lifting wire rope 5 by a hanger 4 provided therein. A shaft guide 6 that holds and rotatably supports multiple stirring shafts 1 is suspended by a shaft guide elevating wire rope 7, and the shaft guide 6 and the stirring drive unit 3 are guided by a tower 8 and are individually raised and lowered. The multi-segmented tower 8 is supported at its lower end by a base 12. The upper part is attached to the tip of a boom 14 of a wheel crane 17 which becomes a base machine via a rotating means 13, by means of a bin 15.
It can swing back and forth, and the entire device including the bin 15 and below is connected so that it can be suspended. The tower 8 has divided flanges connected by bolts, and has a bin bracket 9 at the rear of the flange for temporary connection with a bin, and furthermore, the shaft guide lifting wire rope 7 is connected to the uppermost tower at the rear of the tower. A bracket 16 is provided for connecting the hanger 4 to the climbing tower during traveling of the base machine, which will be described later.
have. In construction using this device, after setting the device so that the stirring shaft is at a predetermined pouring position, the stirring shaft 1 is rotated and the hardening agent and water sealing agent discharged from the tip of the stirring shaft are mixed and stirred with the soil. It penetrates into the ground mainly due to the weight of the stirring drive unit 3. After reaching the predetermined depth, while still mixing and stirring, raise the stirring shaft 1 together with the stirring drive part by winding the wire rope 5 and pull it out.If the penetration force is insufficient to build one construction pillar, A winch provided on the base machine or a winch on the tower may be provided with a forced penetration device that pulls down the stirring drive section using a wire rope. FIG. 2 shows the entire apparatus of another embodiment ready for construction, in which multiple stirring shafts 1 each having stirring blades are connected to a stirring drive unit 22 via a transmission shaft 21 having a polygonal outer circumferential shape. 6 rotational force and underground penetration/extraction force. The stirring drive unit 22 has a rotary output shaft whose center of rotation is made hollow and passes through the transmission shaft 2]7, and a plurality of rollers integrated with the rotary output shaft are applied to each surface of the polygonal outer periphery to apply one rotational force. The structure is such that the transmission shaft can move in the axial direction of the transmission shaft 22, that is, can be raised and lowered freely, and the own weight of the stirring drive unit and the stirring f + drive unit lifting wire rope 23 act as penetration force and pulling force of the stirring shaft 20. In order to transmit the lifting force of the agitation drive unit obtained by winding up to the transmission shaft, means is provided for arbitrarily restraining the movement of the transmission shaft passing through the rotational output shaft in the axial direction. Also, at the top of the boom 14 of the wheel crane 17 is a retractable jib 26 that can be raised and lowered arbitrarily by the expansion and contraction of a hydraulic cylinder 25.
A wire rope 27 having a hook at the tip and being wound around the winch of the base machine is hung from the sheave provided on the jib. Note that the other configurations are the same as the embodiment shown in FIG. 1, and may be provided by the forcible penetration device described above. Fig. 3 shows the lower part of the tower and the base, and the base 31 has a plurality of square holes 33 into which the pyramidal part 32 of the lower part of the tower is inserted, and the base 31 is equipped with a plurality of square holes 33 into which the pyramid part 32 of the lower part of the tower is inserted. It is laid on the ground with enough strength to support. In the square hole, construction columns 35 with multiple stirring shafts 1 are installed at predetermined intervals 36. They are arranged in the same direction and arrangement. High efficiency is achieved if construction is carried out by sequentially replacing multiple bases. FIG. 4 shows a cross section of the upper part of the tower including the tower's swinging means. A swing frame 42 is fixedly attached with bolts to the lower part of a swing bearing 41 whose swing center is hollow, and a swing bracket 43 is attached to the top of the swing bearing 41. It is firmly attached with bolts. The outer circumference of the outer ring of the swing bearing 41 is a gear, the inner shaft is divided into upper and lower parts approximately in the middle of the ball 44, and the upper and lower inner rings are firmly connected with bolts 45. Swivel bracket 4
At the top of 3, attach the base machine's boom top bracket 4
6 and the bin 47 are connected so that the boom can swing freely in the front and rear direction,
The bin position of the swivel bracket is such that the lower end of the tower protrudes slightly forward when the equipment of bin 47 and below is suspended freely, which means that the equipment of bin 47 and below is tilted slightly backwards. . Of the multiple wire ropes that are passed through the multi-row top sheave 48 and the swing bracket sheave 49 from the winch mounted on the base machine, one of the wire ropes rises under the action of the spring 50 when no load is applied, and the five wire ropes A miscellaneous hanging wire rope 53 with a hook 52 at the tip is connected via a collapsible sheave 51 that can be stored after the front end of the device, and is used to assemble and disassemble the device, and to attach shaped steel to serve as a reinforcing material to unhardened construction columns. Used for construction etc. However, in the embodiment shown in FIG. 2, the above work is performed using a wire rope that is passed through the sheave at the tip of the collapsible jib, so the collapsible sheave 51 is not provided, but a sheave 54 placed at the front of the revolving frame is used. The stirring drive unit lifting wire rope 5 is passed through the sheave 55 of the hanger 4 suspended from the stirring drive unit.
The shaft guide elevating wire rope 7 passes vertically through approximately the center of rotation of the hollow portion of the swing bearing 41 and is connected to a winch mounted on the base machine via the swing bracket sheave 49 and top sheave 48, respectively. FIG. 5 is a view taken in the direction of arrow a in FIG. 4, in which an electric motor 62 with a reduction gear is mounted on the side of the revolving frame 42, and the output shaft has a small gear 61 that meshes with the teeth on the outer ring of a revolving bearing whose outer periphery is a gear. The rotating frame and the lower parts of the device are rotated by driving the electric motor. Note that the electric motor 62 with a reduction gear may be a hydraulic motor. In the apparatus of the example detailed above, since the ground bears the reaction force for pulling out the stirring shaft that occurs during construction, a truck crane or wheel crane, which is lighter and smaller than the base machine of the conventional apparatus, is used as the base machine. As a result, the entire device has become smaller and lighter, and the range of distance change between the base machine and the construction position has been expanded by expanding and contracting and undulating the boom. As a result, the swing range has been expanded, making it possible to perform construction over a wide range by fixing the base machine 17 at one location and driving the swing means 13 by swinging, extending/contracting, and raising/lowering the boom 14, as shown in Fig. 6. I made it. In addition, the lower end of the tower is shaped like a square pyramid, and the device section below the boom tip bin (hereinafter referred to as the stirring device), which consists of the rotating means, tower, stirring drive section, transmission shaft, stirring shaft, etc., can be freely tilted slightly backwards. Because it has a base that can be suspended and has a square hole, even when construction is carried out very close to an adjacent building, the stirring device can be freely suspended and the pyramidal part at the bottom end of the tower can be placed in a predetermined position. By placing it in the square hole of the installed base, extending the boom and raising the tower vertically, there is no risk of interference with adjacent buildings, and the stirring device can be quickly positioned, and the use of the base reduces surveying work. did. Furthermore, the disassembly procedure of this device will be described below using FIG. 0) After lowering the shaft guide 6 to the ground, disconnect the shaft guide elevating wire rope 7 and lower the boom 14.
, lift up the stirring device, and remove the shaft guide 6 from below the stirring shaft. (2) After hanging the above-mentioned miscellaneous wire rope on the top of the lowest stirring shaft of the multi-divided stirring shaft 1 to prevent it from tipping over, cut off the lowest stirring shaft, gradually loosen the miscellaneous hanging wire rope, and lower it to the ground. , lower the stirring shaft 1 and the transmission shaft 2 together with the stirring drive section 3, and repeat the above operations one after another to disassemble the stirring shaft and transmission shaft (3) After disassembling the stirring shaft 1 and the transmission shaft 2, the stirring shaft 3 is lowered.
is lowered onto the ground or on a track, and after disconnecting from the hanger 4, the stirring drive section is removed in the same way as for removing the shaft guide 6 described in item (1) above. (4) Place the lower end of the tower 8 on the ground, hang the shaft guide lifting wire rope 7 over the front part of the lowest tower, and after removing the bolts on the tower division flange, tighten the lifting wire rope 7. Loosen it, and with the rear part of the split part flange connected to the bin, fold down the boom and extend it to bend the tower at the bin part mentioned above and lower the lowest tower to the ground.
after that. Remove the bin, cut off the tower, rotate the boom, change the location slightly, and repeat the above steps in order to disassemble the tower, leaving the top tower intact. (5) After attaching the hanger 4 to the bracket 16 of the uppermost tower, the shaft guide elevating wire rope 7 is connected to the turning sheave 11 and the through hole 10 provided at the lower part of the uppermost tower.
By connecting the wire rope to the boom 14 through the wire rope and winding the wire rope with the winch, the uppermost tower, the swing means 13, and the hanger 4 are pulled together below the boom 4, and when the boom is brought down, the travel shown in FIG. 7 is achieved. Possible posture. Therefore, there is no need for a separate crane to disassemble and assemble the device in reverse order, and there is no need to thread or remove the numerous wire ropes that are complicated during one disassembly and assembly. Since a crane can be used as the base machine, there is no need to transport the base machine using a large trailer. [Effects of the invention] The present invention described in detail above makes it possible to reduce the size and weight of the underground continuous M construction equipment. This made it possible to construct an underground continuous wall using the existing earth and sand mixing method. In addition, the base machine can be fixed to enable construction over a wide range, reducing survey work, simplifying the assembly and disassembly work of equipment, and making it possible to use a self-propelled base machine, reducing construction time and costs. realized. Furthermore, construction safety has also been improved because the structure allows safe construction of this type of construction in close proximity to adjacent buildings, and there is no need to frequently move the base machine.
第１図 実施例の装置全体図 第２図 他の実施例の装置全体図 第３図 タワー下部及び基台を示す同 第４図 タワーの旋回手段を含むタワー上部の断面図 第５図 第４図のａ矢視図 Figure 1 Overall diagram of the device in the example Figure 2 Overall diagram of the device of another embodiment Figure 3: Same figure showing the lower part of the tower and the base Figure 4 Cross-sectional view of the upper part of the tower including the tower turning means Figure 5 View from arrow a in Figure 4
Claims (6)
化剤や止水剤を土と撹拌混合することにより土留めや止
水のための地中連続壁を構築する地中連続壁施工装置に
おいて、撹拌駆動部や撹拌軸を昇降案内するタワーの下
端を地面または地面に敷設した基台に支持させ、上端は
タワーの旋回手段を介してトラッククレーンまたはホィ
ールクレーンのブームに揺動自在に連結したことを特徴
とする地中連続壁施工装置。(1) A stirring shaft with stirring blades is rotated through the ground, and a hardening agent and water-stopping agent are stirred and mixed with the soil to construct an underground continuous wall for earth retention and water-stopping. In wall construction equipment, the lower end of the tower that guides the stirring drive unit and stirring shaft up and down is supported on the ground or a base laid on the ground, and the upper end is swung by the boom of a truck crane or wheel crane via the tower's rotation means. An underground continuous wall construction device that is characterized by being freely connected.
回中心部を中空とし、該中空部に、撹拌駆動部を懸垂し
て昇降せしめるワイヤーロープや、撹拌軸を抱えて回転
自在に支持し、タワーに案内されて昇降するシャフトガ
イドを懸垂して昇降せしめるワイヤーロープを貫通させ
た特許請求範囲第１項に記載の地中連続壁施工装置。(2) The turning means has a turning drive prime mover, and has a hollow turning center, and a wire rope that suspends the stirring drive unit to raise and lower it, and a stirring shaft that is rotatably supported in the hollow part. The underground continuous wall construction apparatus according to claim 1, wherein a wire rope for lifting and lowering a shaft guide which is guided by a tower and is suspended therethrough is passed through the shaft guide.
台面に撹拌軸の貫入打設間隔に配した複数の角穴を有す
特許請求範囲第１項に記載の地中連続壁施工装置。(3) The underground continuous wall construction according to claim 1, wherein the tower has a pyramidal lower end and a plurality of square holes arranged in the base surface at intervals at which the stirring shaft is inserted. Device.
な状態のタワーを、クレーンブームより自由懸垂した状
態で撹拌軸側を前とし、タワー側を後として、タワー下
端が若干前方に出る状態、すなわち、タワーが鉛直より
後方に傾いた姿勢となすタワー上部の位置を前記連結し
た特許請求範囲第１項に記載の地中連続壁施工装置。(4) The tower, which is ready for construction with the stirring drive unit and stirring shaft etc. attached, is suspended freely from the crane boom, with the stirring shaft side facing forward and the tower side facing backward, with the lower end of the tower slightly forward. The diaphragm wall construction apparatus according to claim 1, wherein the upper part of the tower is connected so that the tower is in a position where the tower is tilted backward from the vertical.
よる仮連結用ブラケットを有す特許請求範囲第１項に記
載の地中連続壁施工装置。(5) The underground continuous wall construction device according to claim 1, wherein the tower is of a split type and has a bracket for temporary connection using a pin at the rear of the split portion.
方から後方にワイヤーロープを貫通させる転向シーブ及
び貫通穴を有す特許請求範囲第５項に記載の地中連続壁
施工装置。(6) The underground continuous wall construction apparatus according to claim 5, which has a turning sheave and a through hole for passing a wire rope through from the front to the rear at the lower part of the uppermost tower of the divided tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25268790A JP2843949B2 (en) | 1990-09-20 | 1990-09-20 | Underground wall construction equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25268790A JP2843949B2 (en) | 1990-09-20 | 1990-09-20 | Underground wall construction equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04131421A true JPH04131421A (en) | 1992-05-06 |
| JP2843949B2 JP2843949B2 (en) | 1999-01-06 |
Family
ID=17240846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25268790A Expired - Fee Related JP2843949B2 (en) | 1990-09-20 | 1990-09-20 | Underground wall construction equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2843949B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112681426A (en) * | 2020-12-22 | 2021-04-20 | 中铁工程机械研究设计院有限公司 | Anti-shaking device and double-wheel slot milling machine |
-
1990
- 1990-09-20 JP JP25268790A patent/JP2843949B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112681426A (en) * | 2020-12-22 | 2021-04-20 | 中铁工程机械研究设计院有限公司 | Anti-shaking device and double-wheel slot milling machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2843949B2 (en) | 1999-01-06 |
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