JP4064984B2 - Drilling method of hole in low head space - Google Patents

Drilling method of hole in low head space Download PDF

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Publication number
JP4064984B2
JP4064984B2 JP2005223176A JP2005223176A JP4064984B2 JP 4064984 B2 JP4064984 B2 JP 4064984B2 JP 2005223176 A JP2005223176 A JP 2005223176A JP 2005223176 A JP2005223176 A JP 2005223176A JP 4064984 B2 JP4064984 B2 JP 4064984B2
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pit
reverse circulation
leader
excavator
enclosure
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JP2007039921A (en
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忠良 石橋
勝彦 大迫
宏一 吉田
ゆり 仲川
章 西村
年宏 北原
卓次郎 五十嵐
正敬 久原
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TOA-TONE BORING CO., LTD.
East Japan Railway Co
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TOA-TONE BORING CO., LTD.
East Japan Railway Co
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Description

本発明は、鉄道構造物の建設時のホーム下、線路間あるいは線路側のように、上部空間が狭い場所に杭などを構築する際の穴の形成方法に関する。   The present invention relates to a method for forming a hole when a pile or the like is constructed in a place where an upper space is narrow, such as under a platform at the time of construction of a railway structure, between tracks or on the track side.

営業中の鉄道の駅舎にホームを増設したり、また、駅ビルを増改築する場合、基礎工や土留工は、鉄道の営業の障害とならないよう、特に、利用者の障害とならないように運行終了後の夜間に実施せざるを得ず、また、レール上には電車用電源を供給する架線があるため、工事機械が接触しないようにしなければならないため、通常の施工機械が使用できず、工期がかかるという問題がある。
新たな基礎は、線路と線路の間やホームに構築することになるが、構築の際のホームの占有面積、特に占有幅を極力小さくして、乗客がホームを移動したり、待ち行列の形成を邪魔しないようにする必要がある。
If you add a platform to a railway station building that is in operation, or if you add or renovate a station building, the foundation work and earthwork work will not be a hindrance to the railway business, especially so that it does not hinder the users. It must be carried out at night after the completion, and since there is an overhead line that supplies power for the train on the rail, it is necessary to prevent the construction machine from touching, so normal construction machines can not be used, There is a problem that it takes a work period.
The new foundation will be built between the tracks and between the tracks, or at the platform, but the area occupied by the platform, especially the occupied width, will be made as small as possible so that passengers can move around the platform and form queues. It is necessary not to disturb.

上部空間の小さい施工現場に適用可能な杭穴形成用掘削機として、特許第2645976号公報には、図6に示すように、短尺リーダマストを起伏自在にし、左右にシリンダーによる昇降脚を設けた駆動装置に筒状回転軸の下方を下側に突出させて上下に貫通させて立上げ、この駆動装置をリーダマストのリーダに昇降自在に係合させ、スクリューオーガ軸等の掘削軸に形成した把持ドラムを前記筒状回転軸内周に係止可能とした掘削機が開示されている。この掘削機は、回転軸内に上方より鋼管やオーガを吊り込み、回転軸の下部の把持ドラムに掘削軸を把持させて掘削を行い、1ピッチ分下降すると回転軸とのロックを解き、回転軸を昇降脚によって押し上げて次段の下方の尺取り虫式に掘削をおこなうものである。
しかしながら、この掘削機は、もり変え作業が煩雑であって時間がかかり、工期が長くなる。
特許2645976号公報
As an excavator for forming a pile hole that can be applied to a construction site having a small upper space, Japanese Patent No. 2645976 has a short leader mast as shown in FIG. The lower part of the cylindrical rotating shaft protrudes downward from the driving device and is vertically penetrated to rise up. The driving device is engaged with the leader of the leader mast so as to be movable up and down, and formed on a drilling shaft such as a screw auger shaft. An excavator is disclosed in which a gripping drum can be locked to the inner periphery of the cylindrical rotary shaft. This excavator hangs a steel pipe or auger from above into the rotating shaft, holds the excavating shaft on the gripping drum below the rotating shaft, and performs excavation. When lowered by one pitch, it unlocks the rotating shaft and rotates. The shaft is pushed up by a lifting leg and excavated into a scale-worm type below the next stage.
However, this excavator requires complicated and time-consuming work, and requires a long construction period.
Japanese Patent No. 2645976

本発明は、作業空間の高さが低い施工現場において、迅速な掘削作業を可能とすると共に、施工機械の占有面積を極力小さくして、列車や乗客の邪魔にならないようにするものである。   The present invention enables a quick excavation work at a construction site where the height of the work space is low, and makes the occupation area of the construction machine as small as possible so as not to obstruct trains and passengers.

ホームに開口を設けてリバースサーキュレーション掘削機を地盤面に設置し、開口を覆う天井を有する囲いを設置し、囲い内においてリバースサーキュレーション用のロッドを継ぎ足して所定の深度まで掘削することによって、ホームの利用者への悪影響を解消し、施工を迅速におこなえるようにした。
また、ホーム下の地盤にピットを形成することによって、更にホームの占有面積を小さくして、ホーム利用者への影響を小さくしたものである。
By installing an opening in the home and installing a reverse circulation excavator on the ground surface, installing an enclosure with a ceiling covering the opening, and adding a rod for reverse circulation in the enclosure to excavate to a predetermined depth, The adverse effects on home users have been eliminated, and construction can be performed quickly.
Further, by forming pits in the ground below the platform, the area occupied by the platform is further reduced, and the influence on the home user is reduced.

更に、線路の間にピットを形成し、ピット内にリバースサーキュレーション掘削機を設置してピットを覆う天井を有する囲いを設置し、ピット内でリバースサーキュレーション用のロッドを継ぎ足して所定の深度まで掘削することによって、列車の運行に支障を与えることなく地盤に穴を形成できるようにした。   Furthermore, a pit is formed between the tracks, a reverse circulation excavator is installed in the pit, a fence with a ceiling covering the pit is installed, and a reverse circulation rod is added in the pit to a predetermined depth. By excavating, it was possible to form holes in the ground without hindering train operation.

本発明方法によれば、駅舎や鉄道線路内の低空頭の現場に基礎穴を形成する場合、迅速に施工することが可能であり、プラットホームの下の地盤を掘削する場合でも、占有幅が小さく、ホーム利用者の邪魔になることなく、かつ、工事用機器を架線に接触させることなく安全に工事を進めることが可能である。   According to the method of the present invention, when a foundation hole is formed in a low-empty site in a station building or railroad track, it is possible to perform construction quickly, and even when excavating the ground under the platform, the occupied width is small. It is possible to proceed with the construction safely without disturbing the home user and without bringing the construction equipment into contact with the overhead wire.

実施例1
図1に示すように、鉄道駅のプラットホーム10に開口1を形成する。開口1は、線路の長手方向を長辺とし、ホームの幅方向を短辺として長方形であり、短辺を極力小さくしてホームを占有する幅を小さくし、ホームの利用者の往来等の障害にならないようにする。
Example 1
As shown in FIG. 1, an opening 1 is formed in a platform 10 of a railway station. The opening 1 is rectangular with the long side of the track as the long side and the width direction of the home as the short side, and the short side is made as small as possible to reduce the width of the home, thereby obstructing the traffic of home users. Do not become.

図2(1)に示すように、ホーム10の下の地盤面にスタンドパイプ3を設置し、内部を400〜600mm掘削し、スタンドパイプ3内に回転ビット41を設置する。リバースサーキュレーション掘削機4を開口1を通してホーム10の下に導入する。   As shown in FIG. 2 (1), the stand pipe 3 is installed on the ground surface below the home 10, the inside is excavated 400 to 600 mm, and the rotating bit 41 is installed in the stand pipe 3. A reverse circulation excavator 4 is introduced under the home 10 through the opening 1.

図2(1)に示すように、リバースサーキュレーション掘削機4をスタンドパイプ3の上に横移動して設置する。この掘削機4は、基台40に傾倒式リーダ42が設けてあり、傾倒式リーダ42を上下動するリバースサーキュレーション用の水中サンドポンプ51を内蔵する駆動装置5を有するものである。傾倒式リーダ42を倒した状態で開口1からホーム10の下に導入する。
図3に示すように、スタンドパイプ3の近傍には、リバースサーキュレーション用のロッド7を収納できる格納台車46を設置して、掘削深度に応じた必要本数のロッドを収納しておく。
As shown in FIG. 2 (1), the reverse circulation excavator 4 is laterally moved and installed on the stand pipe 3. The excavator 4 includes a tilting type reader 42 on a base 40 and includes a driving device 5 incorporating a submersible sand pump 51 for reverse circulation that moves the tilting type reader 42 up and down. The tilt reader 42 is introduced from the opening 1 under the home 10 while being tilted.
As shown in FIG. 3, a storage carriage 46 capable of storing the reverse circulation rod 7 is installed in the vicinity of the stand pipe 3 to store a required number of rods according to the excavation depth.

図3に示すように、掘削機4の設置が完了したら、高さ2m程度の天井81を有する囲い8をホーム上に設置し、ホーム利用者には、機械類が設置されているのが見えないようにすると共に、囲い8の内面にはフェルトやグラスウールからなる吸音・遮音材を設置し、機械音の騒音がホームの乗客に漏れ出ないようにする。   As shown in FIG. 3, when installation of the excavator 4 is completed, an enclosure 8 having a ceiling 81 having a height of about 2 m is installed on the platform, and the home user can see that the machinery is installed. At the same time, a sound absorbing and sound insulating material made of felt or glass wool is installed on the inner surface of the enclosure 8 so that the noise of mechanical sound does not leak to the passengers of the home.

図2(3)に示すように、駆動装置5にベント管61を介してリバースサーキュレーションホース6を連結し、駆動装置5によって回転ビット41を回転させ、スタンドパイプ3内に泥水を供給しながら掘削する。掘削土砂は駆動装置5に内臓された水中サンドポンプ51によって外部に排除される。掘削土砂と泥水は分離され、土砂は処分され、泥水は調整されて再使用される。   As shown in FIG. 2 (3), the reverse circulation hose 6 is connected to the driving device 5 via the vent pipe 61, the rotating bit 41 is rotated by the driving device 5, and muddy water is supplied into the stand pipe 3. Excavate. The excavated sediment is removed to the outside by a submersible sand pump 51 built in the drive unit 5. The excavated sediment and mud are separated, the sediment is disposed of, and the mud is adjusted and reused.

移動可能なロッド車輪付格納台車46には、長さが1.5m程度のリバースサーキュレーション用のロッド7が掘削深さに間に合う数が搬入されて掘削位置の近くに取り出しやすいように準備してある。
回転ビット41によって地盤を掘進して駆動装置5が下降してリーダ42の下端に達したら、駆動装置5とベント管61の連結を解除して駆動装置5からはずし、図2(4)に示すように、ベント管61にロッド7を連結して図2(5)に示すように吊り上げて駆動装置5に連結し、図2(6)に示すように、回転ビット41によって更に地盤を掘削していく。
The movable carriage 46 with rod wheels is prepared so that the number of reverse circulation rods 7 having a length of about 1.5 m can be taken in close to the excavation position so that it can be taken in close to the excavation depth. is there.
When the ground is excavated by the rotating bit 41 and the drive device 5 descends and reaches the lower end of the reader 42, the connection between the drive device 5 and the vent pipe 61 is released and removed from the drive device 5, as shown in FIG. As shown in FIG. 2 (5), the rod 7 is connected to the vent pipe 61, and the rod 7 is connected to the driving device 5, and the ground is further excavated by the rotating bit 41 as shown in FIG. 2 (6). To go.

図2(7)に示すように、回転ビット41による掘進によって駆動装置5がリーダ42の下端に達したら、ホース6とロッド7の連結を解いて、新たなロッド7を継ぎ足して掘削する。この作業を回転ビット41が所定の深度に達するまで繰り返す。
所定の深度に達したところで、掘削を停止し、駆動装置5を引き上げてロッド7の連結を解除して回収する。
掘削穴内に鉄筋籠を吊降ろし、コンクリートを打設して場所打杭を造成する。
As shown in FIG. 2 (7), when the driving device 5 reaches the lower end of the leader 42 by the excavation by the rotating bit 41, the connection between the hose 6 and the rod 7 is released, and a new rod 7 is added and excavated. This operation is repeated until the rotating bit 41 reaches a predetermined depth.
When the predetermined depth is reached, the excavation is stopped, and the drive device 5 is pulled up to disconnect the rod 7 and collect it.
A cast-in-place pile is created by hanging a reinforcing bar in the excavation hole and placing concrete.

図4に示すように、ホーム10の下の地盤面を掘削してピット2を形成して掘削機4を設置する地盤面21を低くすることによって、ホームに設置する囲いを更に小さくすることができる。   As shown in FIG. 4, it is possible to further reduce the enclosure to be installed on the home by excavating the ground surface under the platform 10 to form the pit 2 and lowering the ground surface 21 on which the excavator 4 is installed. it can.

実施例2
図5に示すように、線路の間にピット2を形成し、ピット2内にケーシングをスタンドパイプ3としてピット底面21に設置し、スタンドパイプ3内に回転ビット41を設置する。
ピット2の深さは、掘削機4の頭部が列車の通過の障害とならないものとする。実施例1と同様に、リーダ42が傾倒可能なリバースサーキュレーション掘削機4を駆動装置5がスタンドパイプ3の上部に位置するようにセットし、傾倒式リーダ42を起立させ、駆動装置5をスタンドパイプ3内の回転ビット41に連結する。
Example 2
As shown in FIG. 5, pits 2 are formed between the tracks, a casing is installed as a stand pipe 3 in the pit 2 on the pit bottom surface 21, and a rotating bit 41 is installed in the stand pipe 3.
It is assumed that the depth of the pit 2 is such that the head of the excavator 4 does not obstruct the passage of the train. As in the first embodiment, the reverse circulation excavator 4 in which the leader 42 can be tilted is set so that the driving device 5 is positioned above the stand pipe 3, the tilting reader 42 is raised, and the driving device 5 is placed on the stand. Connected to a rotating bit 41 in the pipe 3.

施工手順は、図3に示した実施例1と同じである。駆動装置5にリバースサーキュレーションホース6を連結し、駆動装置5によって回転ビット41を回転させてスタンドパイプ3内を掘削する。掘削土砂は駆動装置5に付設された水中サンドポンプ51によって吸引されて掘削土砂と泥水に分離され、土砂は外部に搬出される。分離された泥水は、調整されて再使用される。   The construction procedure is the same as that of Example 1 shown in FIG. The reverse circulation hose 6 is connected to the drive device 5, and the rotary bit 41 is rotated by the drive device 5 to excavate the inside of the stand pipe 3. The excavated earth and sand are sucked by an underwater sand pump 51 attached to the drive unit 5 and separated into excavated earth and mud, and the earth and sand are carried out to the outside. The separated muddy water is adjusted and reused.

本発明の実施例1を説明する平面図。FIG. 2 is a plan view illustrating Example 1 of the present invention. 本発明の工程説明図。Process explanatory drawing of this invention. 本発明の実施例1を説明する正面図。The front view explaining Example 1 of the present invention. 本発明の実施例1の変形例の正面図。The front view of the modification of Example 1 of this invention. 本発明の実施例2の正面図。The front view of Example 2 of this invention. 従来の低空頭用掘削機。Conventional low-head excavator.

符号の説明Explanation of symbols

1 開口
10 プラットホーム
2 ピット
3 スタンドパイプ
4 掘削機
42 傾倒式リーダ
8 囲い
1 Opening 10 Platform 2 Pit 3 Standpipe 4 Excavator 42 Tilt Reader 8 Enclosure

Claims (2)

ホームに開口を設けてホーム下の地盤を掘り下げてピットを形成し、傾倒式リーダを有するリバースサーキュレーション掘削機のリーダを倒した状態でピットの地盤面に設置し、天井を有する吸音・遮音性の囲いを開口の周囲に設置し、囲い内においてリーダを起立させてリバースサーキュレーション用のロッドを継ぎ足して所定の深度まで掘削する穴の掘削方法。 Opening the platform and digging the ground below the platform to form a pit, and installing the reverse circulation excavator with a tilted leader on the ground surface of the pit, with the ceiling, sound absorption and sound insulation A hole excavation method in which an enclosure is installed around an opening, a leader is erected in the enclosure, and a rod for reverse circulation is added to excavate to a predetermined depth. 線路の間にピットを形成し、傾倒式リーダを有するリバースサーキュレーション掘削機のリーダを倒した状態でピットの地盤面に設置し、天井を有する吸音・遮音性の囲いを開口の周囲に設置し、囲い内においてリーダを起立させてリバースサーキュレーション用のロッドを継ぎ足して所定の深度まで掘削する穴の掘削方法。 A pit is formed between the tracks, and installed on the ground surface of the pit with the leader of the reverse circulation excavator having a tilting leader tilted, and a sound-absorbing and sound-insulating enclosure with a ceiling is installed around the opening. A method for excavating a hole in which a leader is erected in an enclosure and a rod for reverse circulation is added to excavate to a predetermined depth.
JP2005223176A 2005-08-01 2005-08-01 Drilling method of hole in low head space Expired - Fee Related JP4064984B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7205838B1 (en) 2021-11-26 2023-01-17 鹿島建設株式会社 Pile driving device and pile driving method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5189946B2 (en) * 2008-10-07 2013-04-24 東日本旅客鉄道株式会社 Pile hole drilling method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7205838B1 (en) 2021-11-26 2023-01-17 鹿島建設株式会社 Pile driving device and pile driving method
JP2023079031A (en) * 2021-11-26 2023-06-07 鹿島建設株式会社 Pile driving device, and pile driving method

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