JP4048433B2 - Medium digging excavation method and earth hopper used for it - Google Patents

Medium digging excavation method and earth hopper used for it Download PDF

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Publication number
JP4048433B2
JP4048433B2 JP2003097949A JP2003097949A JP4048433B2 JP 4048433 B2 JP4048433 B2 JP 4048433B2 JP 2003097949 A JP2003097949 A JP 2003097949A JP 2003097949 A JP2003097949 A JP 2003097949A JP 4048433 B2 JP4048433 B2 JP 4048433B2
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earth
hopper
sand
soil
hollow pile
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JP2004003308A (en
Inventor
志翔 林
博 社本
裕幸 名波
一博 梛野
一雄 山崎
好平 薗部
勝央 高木
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Nippon High Strength Concrete Co Ltd
Taiheiyo Cement Corp
Sanwa Kizai Co Ltd
Nippon Hume Corp
Toyo Asano Foundation Co Ltd
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Nippon High Strength Concrete Co Ltd
Taiheiyo Cement Corp
Sanwa Kizai Co Ltd
Nippon Hume Corp
Toyo Asano Foundation Co Ltd
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Priority to JP2003097949A priority patent/JP4048433B2/en
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Description

【0001】
【発明の属する技術分野】
本願発明は、鋼管杭、コンクリート中空杭等の既成中空杭内に挿通したオーガスクリューにより中空杭の先掘りを行いつつ、掘削土砂を上方の排土ホッパー内に貯留すると共に、中空杭を先掘り孔内に圧入する中掘り掘削機を使用しての中掘り掘削工法及びそれに使用される排土ホッパーに関する。
【0002】
【従来の技術】
従来、マストに昇降自在に支持された回転駆動部に、ロッド全長にスクリュー羽根を、ロッド下端に掘削ヘッドをそれぞれ有するオーガスクリューの上端を接続し、該オーガスクリューを中空杭内に回転自在に挿通すると共に、上記回転駆動部と中空杭との間に、下端に開閉蓋を有する排土ホッパーを上記オーガスクリュー上端部分を囲む状態に設けた各種の排土ホッパーつき中掘り掘削機が提案されている。
【0003】
しかし、いずれの中掘り掘削機においても、排土ホッパー内に貯留される土砂は地中含水により泥状となり、特に掘削時に水を利用した場合はさらに含水量の多い泥状となり、従って、これを直ちにダンプカーにより場外へ搬出することは困難であるため、従来は、泥状土砂を一旦ホッパーから現場に配置した槽内に排出した後固化材等を混合して搬出可能の状態に処理しているが、これら処理作業に多くの手間がかかり、作業能率を低下させるばかりでなく、余分な処理設備を別途準備しなければならない経済的不利益があった。
【0004】
【発明が解決しようとする課題】
本願第1発明は、作業能率の向上及び設備費の節減を実現する中掘り掘削工法を提供することを課題とし、
本願第2、第3及び第4の各発明は、上記第1発明の課題達成に寄与できる中掘り掘削機の排土ホッパーを提供することを課題とする。
【0005】
【課題を解決するための手段】
上記課題達成のため、本願第1発明は、
マストに昇降自在に支持された回転駆動部に、中空杭内に回転自在に挿通されたオーガスクリューの上端を接続し、該オーガスクリューの回転により中空杭内を上方へ搬送される掘削土砂を収容する開閉蓋つき排土ホッパーを備えた中掘り掘削機を使用し、
上記オーガスクリューにより中空杭の先掘りを行いつつ、掘削土砂を上方の排土ホッパー内に搬送して貯留すると共に、中空杭を先掘り孔内に圧入していく工程と、
上記工程時に、上記排土ホッパー内もしくはその若干手前において泥状掘削土砂に処理材を供給して固形状土砂に処理する工程と、
から成る中掘り掘削工法を提案する。
【0006】
本願第2発明は、
マストに昇降自在に支持された回転駆動部の出力軸に、中空杭内に回転自在に挿通されたオーガスクリュー上端を接続し、該オーガスクリューの回転により中空杭内を上方へ搬送される掘削土砂を収容する開閉蓋つき排土ホッパーを備えた中掘り掘削機において、
上記排土ホッパーに、該ホッパー内の泥状掘削土砂を場外へ搬出できる状態に処理するための処理材を泥状掘削土砂に供給する手段を設け、上記排土ホッパー内に掘削土砂と処理材を撹拌する手段を装備した、
中掘り掘削機の排土ホッパーを提案し、
【0007】
また本願第3発明は、
マストに昇降自在に支持された回転駆動部に、中空杭内に回転自在に挿通されたオーガスクリュー上端を接続し、該オーガスクリューの回転により中空杭内を上方へ搬送される掘削土砂を収容する開閉蓋つき排土ホッパーを備えた中掘り掘削機において、
上記排土ホッパーを上記回転駆動部の下位に支持させ、該排土ホッパー内に両端開口の土砂案内筒を貫通して、該案内筒の開口上端を排土ホッパー内上部に位置させ、
上記土砂案内筒の下端に、上記中空杭上端を着脱自在に連結すると共に、上記オーガスクリューを上記中空杭内から続いて上記土砂案内筒内に回転自在に挿通し、
上記土砂案内筒に、該案内筒内を搬送される泥状掘削土砂を場外へ搬出できる状態に処理するための処理材を泥状掘削土砂に供給する手段を設け、
上記排土ホッパー内に、掘削土砂を撹拌する手段を装備した、
中掘り掘削機の排土ホッパーを提案し、
【0008】
さらに本願第4発明は、
マストに昇降自在に支持された回転駆動部の出力軸に、中空杭内に回転自在に挿通されたオーガスクリュー上端を接続し、該オーガスクリューの回転により中空杭内を上方へ搬送される掘削土砂を収容する開閉蓋つき排土ホッパーを備えた中掘り掘削機において、
上記排土ホッパー内上部に、該ホッパー内の泥状掘削土砂を場外へ搬出できる状態に処理するための処理材を外周に放散する手段を設けると共に、上記放散手段に上記処理材を供給する手段を配置し、
上記排土ホッパー内に掘削土砂を撹拌する手段を装備した、
中掘り掘削機の排土ホッパーを提案する。
【0009】
本願第1、第2、第3及び第4の各発明における上記「泥状掘削土砂を場外へ搬出できる状態に処理する」とは、セメント系固化材、石灰系固化材、セメント−石灰複合系固化材又は吸水剤、さらにそれらと凝集剤との混合材、その他種々の処理材を用いて泥状土砂を場外へ搬出し易い粒状、塊状もしくはゲル状の固形状土砂に処理することをいう。
【0010】
また本願第2、第3発明における上記「処理材を掘削土砂に供給する手段」及び第4発明における「放散手段に処理材を供給する手段」には、液体または粉体の処理材を自然滴下もしくは自然散布するもの、圧搾空気により噴霧もしくは噴射するもの、スクリューコンベアにて供給するもの、その他種々の手段が使用される。また上記「掘削土砂を撹拌する手段」には、ロッドの外周に撹拌羽根、もしくは連続らせん羽根を突設してなる撹拌ロッドを回転させるもの、無端チェン、もしくは撹拌羽根を突設してなる無端チェンを案内車に掛けて走行させるもの等をホッパー内に縦型又は横型に配置する手段、その他種々のものが使用される。さらに第4発明における上記「放射手段」には、回転羽根車、回転噴射器等が使用される。
以下図面を参照して本願発明の実施例について説明する。
【0011】
【実施例】
〔第2発明の実施例〕
まず、便宜上第2発明の排土ホッパーを有する中掘り掘削機について説明する。
図1(イ)、(ロ)において、ベースマシン(1)の前端部にマスト(2)を垂直に支持し、該マスト(2)の長手方向全長に敷設されたガイドレール(3)、(3)に、ホルダー(5)にモータ(6)及び減速機(7)を搭載してなる回転駆動部(4)を上下摺動自在に支持させると共に、トップシーブブロック(8)から垂下したワイヤロープ(9)により昇降自在に吊支し、この駆動部のホルダー(5)下端に横断面矩形の箱形排土ホッパー(10)を連結し、該ホッパー(10)の下端に、オーガスクリュー(11)を挿通された中空既成杭(12)の上端を着脱自在に連結吊支してある。
【0012】
上記排土ホッパー(10)は、図1(ロ)及び図3に示すようにその前面下端部分に排出口(13)を開口すると共に、ホッパー底板を上記排出口(13)に連続する前下りの傾斜底板(14)に形成し、この排出口(13)を開閉すべき蓋(15)は、ゆるく湾曲した蓋本体(15’)の左右側端から延出したアーム(16)、(16)の延出端を、ホッパー(10)の左右側面に、ピン(17)、(17)により揺動自在に軸支すると共に、ホッパー(10)前面に一端を支持した蓋開閉用油圧シリンダ(18)のピストンロッド(19)先端を上記蓋本体(15’)に連結し、該シリンダ(18)の伸縮駆動により蓋(15)がピン(17)、(17)を中心に揺動して排出口(13)を開閉するようにしてある(図3参照)。
【0013】
上記ホッパー(10)内の中心位置には、図2に示すように上記中空杭(12)とほぼ同一内径で両端開口の円筒からなる土砂案内筒(20)を傾斜底板(14)を貫通して開口上端をホッパー(10)内の上部に突出した状態で垂直に固定し、該土砂案内筒(20)の下端に環状の杭取付けキャップ(21)を同心的に固定し、該キャップ(21)に既成中空杭(12)の上端部を着脱自在に連結してある。
【0014】
オーガスクリュー(11)は、ロッドの全長にスクリュー羽根(22)を、ロッド下端に掘削ヘッド(23)をそれぞれ設けたもので、図2(イ)に示すようにその上端部分を中空杭(12)から上記土砂案内筒(20)内に挿通し、そしてスクリューロッド上端をホッパー(10)の上板を貫通して回転駆動部(4)の出力軸(24)に接続してある。
【0015】
上記のようなホッパー(10)の上板上に、本例では4個の撹拌駆動用ギヤードモータ(25)…をオーガスクリュー(11)を囲む位置に設置すると共に、それらの出力軸をホッパー(10)内に突出し、各出力軸に、一例としてロッドの外周に撹拌羽根(27)…を突設してなる撹拌ロッド(26)…の上端をそれぞれ接続してある。各撹拌ロッド(26)…はホッパー(10)内側面と土砂案内筒(20)との空間内にそれぞれ垂下されている。
【0016】
上記ホッパー(10)の左右肩部には、泥状土砂に対する処理材供給手段として、例えば、セメント−石灰複合系固化材の粉末を噴射する噴射器(28)、(28)を噴射方向を斜め下に向けて設置してある。(29)は粉末供給ホース、(30)は圧搾空気供給ホース、(31)はケースである。
【0017】
(32)は、図1(ロ)における上記排土ホッパー(10)の背面に取りつけた絞りワイヤシーブで、これに掛けた絞りワイヤロープ(33)を下方へ導いてベースマシン(1)のウィンチ(図示略)に巻いてある。(34)、(34)はガイドレール(3)、(3)に係合する駆動部(4)のスライド金具、(35)、(35)は同様の排土ホッパー(10)のスライド金具である。
【0018】
〔第1発明の実施例〕
上例の掘削機を用いた中掘り工法について説明する。図1(イ)、(ロ)の状態において、駆動部(4)の始動によりオーガスクリュー(11)を回転させて地盤への掘削を開始すれば、オーガスクリューの掘削ヘッド(23)により中空杭(12)の下方地盤を先掘りし、本例では泥状掘削土砂をスクリュー羽根(22)により中空杭(12)内ついで土砂案内筒(20)内へと上方へ搬出し、そして該案内筒(20)の開口上端からホッパー(10)内に送り出す。それと共に中空杭(12)が絞りワイヤロープ(33)の下方への引張りにより先掘りされた縦孔内に圧入されていく。
【0019】
上記掘削工程とともに、撹拌駆動用ギヤードモータ(25)…を始動して各撹拌ロッド(26)…を回転させ、ホッパー(10)内の泥状土砂を撹拌すると共に、噴射器(28)、(28)のスイッチ操作により粉末固化材を土砂に噴射し、それにより泥状土砂を粒状の固形状土砂に処理する。上記の噴射される粉末固化材は、管理の上、処理すべき泥状土砂に対し定量噴射されるように制御する場合もある。
【0020】
単位長の杭の沈設が終了し、ホッパー(10)が地表近くに降下したところで、ダンプカーを寄せ、蓋開閉用シリンダ(18)の縮小駆動により蓋(15)を開き、それにより固形処理土砂を排出口(13)から荷台へ直接投下し、場外へ搬出する。投下後蓋(15)を閉じて掘削工程と固形処理工程を再開する。
【0021】
上記第2発明の他の実施例として、上例の排土ホッパー(10)内に、上記縦型撹拌ロッド(26)…に加え、該撹拌ロッド(26)と同一構造の撹拌ロッド複数本を、排出口(13)に連続する傾斜底板(14)に接近する位置に横型に配置したものもえられる。
本例によれば、ホッパー内底部に未処理で堆積しがちな土砂を撹拌して処理を受けさせる。
【0022】
〔第3発明の実施例〕
本例では、処理材を土砂案内筒(20a)内に供給する発明の実施例で、図4に示すように、一例として一対のスクリューコンベアの各スクリューケーシング(36a)、(36a)を排土ホッパー(10a)内下部に水平に配置してケーシング前端の各押出口(37a)、(37a)を土砂案内筒(20a)の周壁に接続すると共に、ケーシング後端部を排土ホッパー(10a)外に突出し、そして各スクリュー(38a)、(38a)のロッド後端部に固着されたスプロケット(39a)、(39a)に、排土ホッパー(10a)下面に設置されたモータ(40a)、(40a)からスプロケット(41a)、(41a)及びチエン(42a)、(42a)を介して回転を伝達するようにし、さらにケーシング(36a)、(36a)後端の入口(43a)、(43a)に固化材粉末を入れたホッパー(44a)、(44a)を接続し、他の構造は図1、2、3と実質的に同一である。
【0023】
上例によれば、土砂案内筒(20a)内を上方へ搬送される泥状掘削土砂に早い段階で固化材を供給し、スクリューにより混合するから、排土ホッパー(10a)内で撹拌ロッド(26a)…により撹拌される掘削土砂は十分な固形化処理がなされる。
【0024】
〔第4発明の実施例〕
本例は、排土ホッパー(10b)内で処理材を泥状掘削土砂に広く散布する発明の実施例で、図5に示すように排土ホッパー(10b)内上部において、該ホッパー(10b)上板下面に環状ホルダー(45b)をオーガスクリュー(11b)のロッドと同心的に固化し、該ホルダー(45b)にボールベアリング(46b)を介して回転リング(47b)を支持し、該リング(47b)の下位に、一例として円盤上に複数の羽根を放射状に突設してなる羽根車(48b)を上記オーガスクリュー(11b)ロッドと同心的にアーム(49b)…により固定し、また上記回転リング(47b)の外周面に固定された大歯車(50b)に、排土ホッパー(10b)上面に設置されたモータ(51b)の出力軸に固定された小歯車(52b)をかみ合わせ、該モータ(51b)の回転を羽根車(48b)に伝達するようにし、さらに回転駆動部(4b)のホルダー(5b)に、処理材供給手段として固化材粉末の噴射器(28b)を取りつけ、その噴射ノズルから上記羽根車(48b)上に固化材を供給し、供給される固化材を回転する羽根車(48b)により外周に広く放散する。
【0025】
上例によれば、排土ホッパー(10b)内において、回転する羽根車(48b)により固化材を泥状掘削土砂に広く散布し、それにより排土ホッパー内の泥状掘削土砂をまんべんなく固形化することができる。
【0026】
【発明の効果】
本願第1発明の中掘り掘削工法によれば、中掘り掘削による中空杭圧入工程を行いつつ、排土ホッパー内に泥状掘削土砂を貯留しながら処理材を供給して、場外へ搬出できる固形状土砂に処理する工程を行い、それにより作業時間の短縮を可能にするものであり、さらに排土ホッパーから直接ダンプカーに固形状土砂を投入して直ちに場外へ搬出することができるようになり、それにより作業能率の向上及び処理設備の省略を実現できるのである。
【0027】
本願第2発明の中掘り掘削機の排土ホッパーによれば、上記第1発明の中掘り掘削工法を有効に実施することができるのである。
【0028】
本願第3発明の中掘り掘削機の排土ホッパーによれば、上記第2発明の効果に加え、泥状掘削土砂が排土ホッパー内に送りこまれる前の、土砂案内筒内を上方へ搬送される段階で、該泥状掘削土砂に処理材を供給し混合しておくから、排土ホッパー内で撹拌手段により撹拌されたとき泥状掘削土砂にさらに十分な処理を行うことができるのである。
【0029】
本願第4発明の中掘り掘削機の排土ホッパーによれば、上記第2発明の効果に加え、排土ホッパー内に送りこまれる泥状掘削土砂に対し処理材を放散手段により外周に広く散布することができ、それにより泥状掘削土砂をまんべんなく十分に処理することができるのである。
【図面の簡単な説明】
【図1】(イ)本願第2発明による排土ホッパーを備えた中掘り掘削機の側面図である。
(ロ)(イ)図における排土ホッパー部分の拡大図である。
【図2】(イ)図1(ロ)のA−A線断面図である。
(ロ)図2(イ)のB−B線断面図である。
【図3】排土ホッパーの蓋を開いた状態の一部省略側面図である。
【図4】本願第3発明による排土ホッパーの実施例の一部省略拡大縦断正面図である。
【図5】本願第4発明による排土ホッパーの実施例の同上図である。
【符号の説明】
2 マスト
4、4b 回転駆動部
10、10a、10b 排土ホッパー
11、11a、11b オーガスクリュー
12 中空杭
15 蓋
26、26a、26b 撹拌ロッド
28、28b 固化材噴射器
36a スクリューケーシング
38a スクリュー
44a ホッパー
48b 羽根車
[0001]
BACKGROUND OF THE INVENTION
The invention of the present application stores the excavated sediment in the upper discharge hopper while excavating the hollow pile with an auger screw inserted into an existing hollow pile such as a steel pipe pile or a concrete hollow pile, and also excavates the hollow pile. The present invention relates to a medium digging method using a medium digging machine that is press-fitted into a hole, and a soil hopper used therefor.
[0002]
[Prior art]
Conventionally, the upper end of an auger screw having a screw blade at the entire length of the rod and an upper end of an excavation head at the lower end of the rod is connected to a rotary drive unit supported by the mast so as to be movable up and down, and the auger screw is rotatably inserted into the hollow pile. At the same time, various excavating diggers with earthing hoppers have been proposed in which an earthing hopper having an open / close lid at the lower end is provided between the rotary drive unit and the hollow pile so as to surround the upper end portion of the auger screw. Yes.
[0003]
However, in any of the medium digging machines, the earth and sand stored in the discharge hopper becomes mud due to the water content in the ground, and particularly when water is used during excavation, it becomes a mud with a higher water content. Since it is difficult to immediately transport the soil to the outside with a dump truck, the mud earth and sand are once discharged from the hopper into the tank placed at the site and then mixed with the solidified material, etc. so that it can be transported. However, these processing operations require a lot of labor, and not only the work efficiency is lowered, but also there is an economic disadvantage that extra processing facilities have to be prepared separately.
[0004]
[Problems to be solved by the invention]
The first invention of the present application has an object of providing a medium digging excavation method that realizes an improvement in work efficiency and a reduction in equipment costs,
Each of the second, third, and fourth inventions of the present application has an object to provide a soil hopper for an intermediate excavator that can contribute to the achievement of the object of the first invention.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the first invention of the present application is
Connect the upper end of the auger screw that is rotatably inserted into the hollow pile to the rotary drive that is supported by the mast so that it can be moved up and down, and accommodate the excavated soil that is transported upward in the hollow pile by the rotation of the auger screw Use a medium digging excavator equipped with a discharge hopper with a lid to open and close,
While carrying out pre-digging of the hollow pile with the auger screw, conveying and storing the excavated earth and sand in the upper discharge hopper, and press-fitting the hollow pile into the pre-drilled hole;
A step of supplying a treatment material to the mud excavated earth and sand in the earth discharge hopper or slightly before it in the above process, and processing it into solid earth and sand ;
We propose a medium digging method consisting of
[0006]
The second invention of the present application is
Excavation earth and sand that is connected to the output shaft of the rotary drive unit supported by the mast so as to be movable up and down and connected to the upper end of the auger screw that is rotatably inserted in the hollow pile, and is conveyed upward in the hollow pile by the rotation of the auger screw In a medium digging excavator equipped with a soil discharge hopper with an open / close lid to accommodate
In the dumping hopper, the processing material for processing ready to carry the mud drilling sand within the hopper to curb provided with means for supplying the slurry excavation soil, treated material and drilling soil to the dumping hopper Equipped with a means of stirring,
Proposing a soil hopper for medium digging machines,
[0007]
The third invention of the present application is
An auger screw upper end rotatably inserted into the hollow pile is connected to a rotary drive unit supported by the mast so as to be movable up and down, and the excavated sediment transported upward in the hollow pile by the rotation of the auger screw is accommodated. In the middle digging excavator equipped with a soil hopper with an openable lid,
The earth discharge hopper is supported below the rotation drive unit, and the earth and sand guide cylinders at both ends are opened through the earth discharge hopper, and the upper end of the guide cylinder is positioned at the upper part of the earth discharge hopper.
The upper end of the hollow pile is detachably connected to the lower end of the earth and sand guide tube, and the auger screw is continuously inserted from the hollow pile into the earth and sand guide tube,
The earth and sand guide tube is provided with means for supplying a treatment material to the mud excavation earth and sand for processing the mud excavation earth and sand conveyed in the guide tube to a state where it can be carried out of the field,
Equipped with means for stirring the excavated soil in the soil hopper,
Proposing a soil hopper for medium digging machines,
[0008]
Furthermore, the fourth invention of the present application is
Excavation earth and sand that is connected to the output shaft of the rotary drive unit supported by the mast so as to be movable up and down and connected to the upper end of the auger screw that is rotatably inserted in the hollow pile, and is conveyed upward in the hollow pile by the rotation of the auger screw In a medium digging excavator equipped with a soil discharge hopper with an open / close lid to accommodate
Means for dispersing the processing material for processing the mud excavated sediment in the hopper to a state where it can be carried out of the field is provided on the outer periphery of the soil discharge hopper, and supplying the processing material to the diffusion means And place
Equipped with a means for stirring the excavated earth and sand in the earth discharge hopper,
A soil hopper for medium digging machines is proposed.
[0009]
In the first, second, third, and fourth inventions of the present application, “treating the mud excavated earth and sand into a state where it can be carried out of the field” means a cement-based solidified material, a lime-based solidified material, and a cement-lime composite system. This refers to the treatment of a solid, sandy or granular solid earth that is easy to carry out of the muddy earth and sand using a solidifying material or a water-absorbing agent, a mixture of these and a flocculant, and various other treatment materials.
[0010]
In the above-mentioned “means for supplying the treated material to excavated soil” in the second and third inventions of the present application and “means for supplying the treated material to the diffusion means” in the fourth invention, a liquid or powder treated material is naturally dropped. Or what sprays or sprays with compressed air, what is supplied with a screw conveyor, and other various means are used. In addition, the above-mentioned “means for agitating excavated earth and sand” includes an endless chain formed by rotating a stirring blade or a stirring rod formed by projecting a stirring blade or a continuous spiral blade on the outer periphery of the rod, or an endless structure formed by projecting a stirring blade. Means for arranging a chain on a guide car to run in a hopper vertically or horizontally, and various other means are used. Furthermore, a rotary impeller, a rotary injector, or the like is used as the “radiating means” in the fourth invention.
Embodiments of the present invention will be described below with reference to the drawings.
[0011]
【Example】
[Embodiment of the second invention]
First, for the sake of convenience, an intermediate excavator having the earth discharge hopper of the second invention will be described.
1 (a) and 1 (b), guide rails (3), (3), (2) supporting a mast (2) vertically on the front end of the base machine (1) and laying over the entire length in the longitudinal direction of the mast (2). 3) Supports a rotary drive unit (4) in which a motor (6) and a speed reducer (7) are mounted on a holder (5) so as to be slidable in the vertical direction, and also hangs from a top sheave block (8). A rope (9) is suspended up and down freely, a box-shaped earth discharge hopper (10) having a rectangular cross section is connected to the lower end of the holder (5) of the drive unit, and an auger screw (10) is connected to the lower end of the hopper (10). The upper end of the hollow preformed pile (12) inserted through 11) is detachably connected and supported.
[0012]
As shown in FIGS. 1 (b) and 3, the earth discharge hopper (10) opens a discharge port (13) at the lower end portion of the front surface thereof, and the hopper bottom plate descends continuously to the discharge port (13). The lid (15) that is formed on the inclined bottom plate (14) and that opens and closes the discharge port (13) has arms (16), (16) extending from the left and right ends of the loosely curved lid body (15 ′). ) On the left and right side surfaces of the hopper (10), and pivotally supported by pins (17) and (17), and a lid opening / closing hydraulic cylinder (one end supported on the front surface of the hopper (10)). 18) The piston rod (19) tip of 18) is connected to the lid body (15 '), and the lid (15) swings around the pins (17) and (17) by the expansion and contraction drive of the cylinder (18). The discharge port (13) is opened and closed (see FIG. 3).
[0013]
At the center of the hopper (10), as shown in FIG. 2, an earth-and-sand guide tube (20) made of a cylinder having substantially the same inner diameter as the hollow pile (12) and open at both ends passes through the inclined bottom plate (14). The upper end of the opening is fixed vertically in a state protruding from the upper part in the hopper (10), and an annular pile mounting cap (21) is concentrically fixed to the lower end of the earth and sand guide tube (20), and the cap (21 ) Is detachably connected to the upper end of the preformed hollow pile (12).
[0014]
The auger screw (11) is provided with a screw blade (22) at the entire length of the rod and an excavation head (23) at the lower end of the rod, and the upper end portion thereof is a hollow pile (12) as shown in FIG. ) Through the earth and sand guide tube (20), and the upper end of the screw rod passes through the upper plate of the hopper (10) and is connected to the output shaft (24) of the rotation drive unit (4).
[0015]
On the upper plate of the hopper (10) as described above, in this example, four stirring drive geared motors (25) are installed at positions surrounding the auger screw (11), and their output shafts are connected to the hopper ( 10) protrudes inward, and the upper ends of stirring rods (26), which are formed by projecting stirring blades (27) on the outer periphery of the rod, for example, are connected to the output shafts. Each stirring rod (26) is suspended in the space between the inner surface of the hopper (10) and the earth and sand guide tube (20).
[0016]
On the left and right shoulders of the hopper (10), as treatment material supply means for the mud soil, for example, the injectors (28) and (28) for injecting powder of cement-lime composite solidified material are inclined in the injection direction. It is installed facing down. (29) is a powder supply hose, (30) is a compressed air supply hose, and (31) is a case.
[0017]
(32) is a squeeze wire sheave attached to the back surface of the earth discharge hopper (10) in FIG. 1 (b). The squeeze wire rope (33) hung on this is guided downward to winch ( (Not shown). (34) and (34) are guide rails (3) and slide fittings of the drive unit (4) engaged with (3), and (35) and (35) are slide fittings of the same earth discharging hopper (10). is there.
[0018]
[Embodiment of the first invention]
The medium digging method using the above excavator will be described. In the state of FIGS. 1 (a) and 1 (b), if excavation to the ground is started by rotating the auger screw (11) by starting the drive unit (4), the hollow pile is driven by the excavation head (23) of the auger screw. The lower ground of (12) is pre-digged, and in this example, the mud excavated earth and sand is carried upward by the screw blades (22) into the hollow pile (12) and then into the earth and sand guide cylinder (20), and the guide cylinder It feeds out into the hopper (10) from the opening upper end of (20). At the same time, the hollow pile (12) is press-fitted into the vertical hole that has been excavated by pulling the drawn wire rope (33) downward.
[0019]
Along with the excavation step, the stirring drive geared motor (25) is started to rotate the stirring rods (26) to stir the mud in the hopper (10), and the injectors (28), ( The powder solidification material is sprayed onto the earth and sand by the switch operation of 28), thereby treating the mud and sand into granular solid earth and sand. The above-mentioned powder solidified material to be sprayed may be controlled so as to be quantitatively sprayed on the mud soil to be treated.
[0020]
When the stake of the unit-length pile has been completed and the hopper (10) has been lowered to the ground surface, the dump truck is brought in, the lid (15) is opened by the reduction drive of the lid opening / closing cylinder (18), and the solid-treated soil is thus removed. It is dropped directly from the outlet (13) onto the loading platform and carried out of the field. After the dropping, the lid (15) is closed and the excavation process and the solid processing process are restarted.
[0021]
As another embodiment of the second invention, in addition to the vertical stirrer rod (26) in the above earth discharging hopper (10), a plurality of stirrer rods having the same structure as the stirrer rod (26) are provided. In addition, a horizontal plate disposed at a position approaching the inclined bottom plate (14) continuous to the discharge port (13) is also obtained.
According to this example, the earth and sand that tends to be deposited untreated at the bottom of the hopper is stirred to be treated.
[0022]
[Embodiment of the third invention]
In this example, the processing material is supplied into the earth and sand guide cylinder (20a). As shown in FIG. 4, as an example, the screw casings (36a) and (36a) of a pair of screw conveyors are discharged as an example. The hopper (10a) is horizontally arranged in the lower part of the casing, and the extrusion ports (37a) and (37a) at the front end of the casing are connected to the peripheral wall of the earth and sand guide tube (20a), and the rear end of the casing is connected to the soil discharge hopper (10a). A motor (40a), (40a) installed on the lower surface of the earth discharge hopper (10a), sprockets (39a), (39a) protruding outward and fixed to the rod rear ends of the screws (38a), (38a). 40a) to transmit rotation through sprockets (41a) and (41a) and chains (42a) and (42a), and after casings (36a) and (36a) Inlet (43a), a hopper containing the solidifying material powder (43a) (44a), connected to (44a), the other structure is substantially the same as FIG. 1, 2 and 3.
[0023]
According to the above example, since the solidification material is supplied to the mud excavation earth and sand transported upward in the earth and sand guide cylinder (20a) at an early stage and mixed by the screw, the stirring rod (10a) in the earth discharge hopper (10a) The excavated earth and sand agitated by 26a) is sufficiently solidified.
[0024]
[Embodiment of Fourth Invention]
This example is an embodiment of the invention in which the treatment material is widely dispersed in the mud excavated earth and sand in the earth discharge hopper (10b). As shown in FIG. 5, in the upper part in the earth discharge hopper (10b), the hopper (10b) An annular holder (45b) is solidified concentrically with the rod of the auger screw (11b) on the lower surface of the upper plate, and a rotating ring (47b) is supported on the holder (45b) via a ball bearing (46b). 47b), an impeller (48b) formed by projecting a plurality of blades radially on a disk, for example, is fixed concentrically with the auger screw (11b) rod by an arm (49b). The small gear (52b) fixed to the output shaft of the motor (51b) installed on the upper surface of the soil hopper (10b) is connected to the large gear (50b) fixed to the outer peripheral surface of the rotating ring (47b). In addition, the rotation of the motor (51b) is transmitted to the impeller (48b), and a solid material powder injector (28b) is provided as a processing material supply means in the holder (5b) of the rotation drive unit (4b). The solidification material is supplied from the injection nozzle onto the impeller (48b), and the supplied solidification material is widely diffused to the outer periphery by the rotating impeller (48b).
[0025]
According to the above example, in the earth discharge hopper (10b), the rotating impeller (48b) spreads the solidified material widely on the mud excavation earth and sand, thereby solidifying the mud excavation earth and sand in the earth discharge hopper evenly. can do.
[0026]
【The invention's effect】
According to the medium excavation method of the first invention of the present application, while performing the hollow pile press-fitting process by the medium excavation, the processing material is supplied while storing the mud excavated sediment in the earth discharge hopper, and can be carried out of the ground. The process of processing into shaped earth and sand is carried out, thereby making it possible to shorten the work time, and further , solid earth and sand can be directly put into the dump truck from the earth discharging hopper and immediately taken out of the field, As a result, work efficiency can be improved and processing equipment can be omitted.
[0027]
According to the earth digging hopper of the medium digging excavator of the second invention of the present application, the medium digging excavation method of the first invention can be effectively carried out.
[0028]
According to the earth discharge hopper of the medium excavator of the third invention of the present application, in addition to the effect of the second invention, the mud excavated earth and sand is transported upward in the earth and sand guide tube before being sent into the earth discharge hopper. At this stage, the treatment material is supplied to and mixed with the mud excavation soil, so that the mud excavation soil can be further sufficiently processed when it is stirred by the stirring means in the discharge hopper.
[0029]
According to the excavation hopper of the medium excavation machine of the fourth invention of the present application, in addition to the effect of the second invention, the treatment material is widely dispersed on the outer periphery by the diffusion means to the mud excavation sand sent into the excavation hopper. It is possible to treat the mud excavation sediment evenly and thoroughly.
[Brief description of the drawings]
FIG. 1 (a) is a side view of a medium digging excavator provided with a soil hopper according to a second invention of the present application.
(B) It is an enlarged view of the earth discharging hopper part in (A).
2A is a cross-sectional view taken along line AA in FIG.
(B) It is a BB line sectional view of Drawing 2 (I).
FIG. 3 is a partially omitted side view showing a state in which a cover of the earth discharging hopper is opened.
FIG. 4 is a partially omitted enlarged vertical front view of an embodiment of a soil discharge hopper according to the third invention of the present application.
FIG. 5 is a view of the same as the embodiment of the earth discharging hopper according to the fourth invention of the present application.
[Explanation of symbols]
2 Mast 4, 4b Rotation drive unit 10, 10a, 10b Dump hopper 11, 11a, 11b Auger screw 12 Hollow pile 15 Lid 26, 26a, 26b Stirring rod 28, 28b Solidified material injector 36a Screw casing 38a Screw 44a Hopper 48b Impeller

Claims (4)

マストに昇降自在に支持された回転駆動部に、中空杭内に回転自在に挿通されたオーガスクリューの上端を接続し、該オーガスクリューの回転により中空杭内を上方へ搬送される掘削土砂を収容する開閉蓋つき排土ホッパーを備えた中掘り掘削機を使用し、
上記オーガスクリューにより中空杭の先掘りを行いつつ、掘削土砂を上方の排土ホッパー内に搬送して貯留すると共に、中空杭を先掘り孔内に圧入していく工程と、
上記工程時に、上記排土ホッパー内もしくはその若干手前において泥状掘削土砂に処理材を供給して固形状土砂に処理する工程と、
から成る中掘り掘削工法。
Connect the upper end of the auger screw that is rotatably inserted into the hollow pile to the rotary drive that is supported by the mast so that it can be moved up and down, and accommodate the excavated soil that is transported upward in the hollow pile by the rotation of the auger screw Use a medium digging excavator equipped with a discharge hopper with a lid to open and close,
While carrying out pre-digging of the hollow pile with the auger screw, conveying and storing the excavated earth and sand in the upper discharge hopper, and press-fitting the hollow pile into the pre-drilled hole;
A step of supplying a treatment material to the mud excavated earth and sand in the earth discharge hopper or slightly before it in the above process, and processing it into solid earth and sand ;
Medium digging construction method consisting of.
マストに昇降自在に支持された回転駆動部の出力軸に、中空杭内に回転自在に挿通されたオーガスクリュー上端を接続し、該オーガスクリューの回転により中空杭内を上方へ搬送される掘削土砂を収容する開閉蓋つき排土ホッパーを備えた中掘り掘削機において、
上記排土ホッパーに、該ホッパー内の泥状掘削土砂を場外へ搬出できる状態に処理するための処理材を泥状掘削土砂に供給する手段を設け、上記排土ホッパー内に掘削土砂と処理材を撹拌する手段を装備した、
中掘り掘削機の排土ホッパー。
Excavation earth and sand that is connected to the output shaft of the rotary drive unit supported by the mast so as to be movable up and down and connected to the upper end of the auger screw that is rotatably inserted in the hollow pile, and is conveyed upward in the hollow pile by the rotation of the auger screw In a medium digging excavator equipped with a soil discharge hopper with an open / close lid to accommodate
In the dumping hopper, a treating agent for treating a condition that can carry the mud drilling sand within the hopper to curb provided with means for supplying the slurry excavation soil, treated material and drilling soil to the dumping hopper Equipped with a means of stirring,
A soil hopper for medium digging machines.
マストに昇降自在に支持された回転駆動部に、中空杭内に回転自在に挿通されたオーガスクリュー上端を接続し、該オーガスクリューの回転により中空杭内を上方へ搬送される掘削土砂を収容する開閉蓋つき排土ホッパーを備えた中掘り掘削機において、
上記排土ホッパーを上記回転駆動部の下位に支持させ、該排土ホッパー内に両端開口の土砂案内筒を貫通して、該案内筒の開口上端を排土ホッパー内上部に位置させ、
上記土砂案内筒の下端に、上記中空杭上端を着脱自在に連結すると共に、上記オーガスクリューを上記中空杭内から続いて上記土砂案内筒内に回転自在に挿通し、
上記土砂案内筒に、該案内筒内を搬送される泥状掘削土砂を場外へ搬出できる状態に処理するための処理材を泥状掘削土砂に供給する手段を設け、
上記排土ホッパー内に、掘削土砂を撹拌する手段を装備した、
中掘り掘削機の排土ホッパー。
An auger screw upper end rotatably inserted into the hollow pile is connected to a rotary drive unit supported by the mast so as to be movable up and down, and the excavated sediment transported upward in the hollow pile by the rotation of the auger screw is accommodated. In the middle digging excavator equipped with a soil hopper with an openable lid,
The earth discharge hopper is supported below the rotation drive unit, and the earth and sand guide cylinders at both ends are opened through the earth discharge hopper, and the upper end of the guide cylinder is positioned at the upper part of the earth discharge hopper.
The upper end of the hollow pile is detachably connected to the lower end of the earth and sand guide tube, and the auger screw is continuously inserted from the hollow pile into the earth and sand guide tube,
The earth and sand guide tube is provided with means for supplying a treatment material to the mud excavation earth and sand for processing the mud excavation earth and sand conveyed in the guide tube to a state where it can be carried out of the field,
Equipped with means for stirring the excavated soil in the soil hopper,
A soil hopper for medium digging machines.
マストに昇降自在に支持された回転駆動部の出力軸に、中空杭内に回転自在に挿通されたオーガスクリューの上端を接続し、該オーガスクリューの回転により中空杭内を上方へ搬送される掘削土砂を収容する開閉蓋つき排土ホッパーを備えた中掘り掘削機において、
上記排土ホッパー内上部に、該ホッパー内の泥状掘削土砂を場外へ搬出できる状態に処理するための処理材を外周に放散する手段を設けると共に、上記放散手段に上記処理材を供給する手段を配置し、
上記排土ホッパー内に掘削土砂を撹拌する手段を装備した、
中掘り掘削機の排土ホッパー。
Excavation where the upper end of an auger screw that is rotatably inserted in the hollow pile is connected to the output shaft of the rotary drive unit supported by the mast so as to be movable up and down, and the inside of the hollow pile is conveyed upward by the rotation of the auger screw In the middle digging excavator equipped with a discharge hopper with an open / close lid to accommodate earth and sand,
Means for dispersing the processing material for processing the mud excavated sediment in the hopper to a state where it can be carried out of the field is provided on the outer periphery of the soil discharge hopper, and supplying the processing material to the diffusion means And place
Equipped with a means for stirring the excavated earth and sand in the earth discharge hopper,
A soil hopper for medium digging machines.
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CN105003200A (en) * 2015-07-03 2015-10-28 左红 Hole drilling equipment and hole drilling method of hole drilling equipment

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JP4608357B2 (en) * 2005-04-21 2011-01-12 太平洋セメント株式会社 Processing material supply management method and management apparatus in medium digging excavation method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105003200A (en) * 2015-07-03 2015-10-28 左红 Hole drilling equipment and hole drilling method of hole drilling equipment
CN105003200B (en) * 2015-07-03 2017-06-23 左红 Rig and its boring method

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