JP5203167B2 - Ground improvement method - Google Patents
Ground improvement method Download PDFInfo
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- JP5203167B2 JP5203167B2 JP2008319270A JP2008319270A JP5203167B2 JP 5203167 B2 JP5203167 B2 JP 5203167B2 JP 2008319270 A JP2008319270 A JP 2008319270A JP 2008319270 A JP2008319270 A JP 2008319270A JP 5203167 B2 JP5203167 B2 JP 5203167B2
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- 238000000034 method Methods 0.000 title claims description 7
- 238000009412 basement excavation Methods 0.000 claims description 49
- 238000003756 stirring Methods 0.000 claims description 40
- 238000013019 agitation Methods 0.000 claims description 16
- 238000005553 drilling Methods 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 8
- 238000007711 solidification Methods 0.000 claims description 5
- 230000008023 solidification Effects 0.000 claims description 5
- 239000004576 sand Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 description 4
- 239000004568 cement Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000008267 milk Substances 0.000 description 2
- 210000004080 milk Anatomy 0.000 description 2
- 235000013336 milk Nutrition 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Description
本発明は、軟弱地盤に掘進して地盤を改良する地盤改良工法に関する。 The present invention relates to a ground improvement method for improving ground by digging into soft ground.
従来、例えば地盤改良装置として、一般に使用されているパワーショベル機のアーム先端に取りつけられているショベルを取り外し、代って、短小のヘッドロッドの下端部に掘削撹拌翼を回転自在に軸支すると共に、ヘッドロッド内に上記掘削撹拌翼に回転を伝達すべき油圧モータを内蔵してなる掘削撹拌ヘッドロッドを取りつけた構造のもので、使用においては、上記掘削撹拌翼の回転により、地盤に縦孔を掘削し、該縦孔内にヘッドロッドを装入しつつセメントミルクを注入して、縦孔内の掘削土砂とセメントミルクを撹拌混合していくものが広く知られている。 Conventionally, for example, as a ground improvement device, a shovel attached to the tip of an arm of a generally used power shovel machine is removed, and instead, a drilling stirring blade is rotatably supported at the lower end of a short head rod. In addition, the head rod has a structure in which a drilling and stirring head rod having a built-in hydraulic motor to transmit rotation to the drilling and stirring blade is mounted. It is widely known to excavate a hole, inject cement milk while inserting a head rod into the vertical hole, and stir and mix the excavated soil and cement milk in the vertical hole.
しかし、上記のような従来の地盤改良装置では、アームの屈伸降下操作により掘削撹拌ヘッドロッドの全長を地中に押しこんだ後は、それ以上深く押しこむことができず、従って、さらに深く地盤を掘削、撹拌したい場合に、それに応えることができない欠点があり、その点の改良が切望されていた。
本願発明は、掘削作業ヘッドロッドを地中に押しこんだ後、さらに深く押しこむことができる地盤改良工法を提供することを課題とする。 This invention makes it a subject to provide the ground improvement construction method which can be pushed in more deeply after pushing an excavation work head rod into the ground.
本願発明は、
下端部に掘削撹拌翼を軸支すると共に該掘削撹拌翼を回転させるモータを備えてなる掘削攪拌ヘッドロッドの上端に、長軸ロッドを同一軸線上に接続して長い掘削攪拌ロッドを形成し、
上記掘削攪拌ロッドを、ベースマシンに突設された支持部材にホルダーを介して昇降自在に保持させ、
上記ホルダーに、駆動輪及び該駆動輪を回転させる正逆回転モータを設けると共に、上記長軸ロッドに、上記駆動輪とかみ合って長軸ロッド上端部からほぼ下端部まで延長する従動帯を敷設し、上記駆動輪の回転により上記従動帯を介して上記掘削攪拌ロッドを昇降させる地盤改良装置を使用し、
上記掘削撹拌翼の回転により軟弱地盤へ掘削を行うと共に、固化液を注入して該固化液と掘削土砂との撹拌混合を行いつつ掘進していき、
上記掘削撹拌ヘッドロッド全長を地中に掘進したら、上記ホルダーを保持した状態で、上記駆動輪の回転により上記従動帯を下方へ引張って上記長軸ロッドを降下させ、それにより上記掘削撹拌ヘッドロッドを地中に押しこんで、さらなる掘削、撹拌を継続し、
所望深さまで掘削、撹拌を行ったら、上記駆動輪の逆回転により上記従動帯を上方へ引張って上記長軸ロッドを上昇させ、それに伴って上記掘削撹拌ヘッドロッドを地上に引き抜く、
地盤改良工法を提案する。
The present invention is
A long excavation agitation rod is formed by connecting a long axis rod on the same axis on the upper end of an excavation agitation head rod provided with a motor that supports the excavation agitation blade at the lower end and rotates the excavation agitation blade ,
The excavation stirring rod is held by a support member projecting from the base machine so as to be movable up and down through a holder,
The holder is provided with a drive wheel and a forward / reverse rotation motor for rotating the drive wheel, and a long belt is engaged with the drive wheel and a driven belt extending from the upper end portion of the long shaft rod to the substantially lower end portion is laid on the holder. , Using a ground improvement device that raises and lowers the excavation stirring rod through the driven belt by rotation of the drive wheel,
While excavating to the soft ground by the rotation of the excavation stirring blade, the solidification liquid is injected, and the solidification liquid and excavation earth and sand are stirred and mixed,
After excavating the entire length of the excavation agitation head rod into the ground, while holding the holder, the driven wheel is pulled downward to pull the driven belt downward to lower the long axis rod, thereby the excavation agitation head rod And continue drilling and stirring,
After excavating and stirring to a desired depth, pulling the driven belt upward by reverse rotation of the drive wheel to raise the long rod, and accordingly pulling the excavation stirring head rod to the ground,
A ground improvement method is proposed.
本願発明の地盤改良工法によれば、掘削撹拌ヘッドロッドにより掘削、及び固化液と掘削土砂の撹拌混合を行いつつ掘進し、掘削撹拌ヘッドロッド全長が地中に掘進したら、次は駆動輪の回転により長軸ロッドを降下させて、上記掘削撹拌ヘッドロッドをさらに地中に掘進させてさらに深く掘削、撹拌を継続させて、より深い地盤改良を行うことができ、所望深さの掘削撹拌後は、駆動輪の逆回転により長軸ロッドを上昇させて掘削撹拌ロッドを地上に引抜くことができるのである。 According to the ground improvement method of the present invention, excavation with the excavation stirring head rod and excavating while mixing the solidified liquid and excavated earth and sand, the excavation stirring head rod full length excavated into the ground, the next rotation of the drive wheel By lowering the long axis rod, the above excavation stirring head rod is further dug into the ground to continue deeper excavation and stirring, and deeper ground improvement can be performed. The long shaft rod can be raised by reverse rotation of the drive wheel, and the excavation stirring rod can be pulled out to the ground.
本発明における掘削作業ヘッドロッド下端の「掘削作業翼」には、ヘッドロッドの軸心線上に支持された軸に取りつけた各種の掘削翼、掘削撹拌翼、又はヘッドロッドの軸心線と直角に支持された軸に取りつけた各種の掘削撹拌翼がある。 In the “excavation work blade” at the lower end of the excavation work head rod in the present invention, various excavation blades attached to the shaft supported on the axis of the head rod, the excavation agitation blade, or the axis of the head rod at right angles There are various drilling and stirring blades attached to the supported shaft.
又、掘削作業ロッドを昇降自在に保持するための「ベースマシンに突設された支持部材」には、パワーショベル機を利用した場合の屈伸、昇降自在のアーム、ベースマシンの前端部に突設した固定式アームもしくはブラケット、その他種々のものが使用される。 In addition, the "support member protruding from the base machine" for holding the excavation work rod so as to be able to move up and down projects to the front end of the base machine. A fixed arm or bracket or other various types are used.
さらに、「駆動輪とそれにかみ合う従動帯」には、スプロケットとチェン、ピニオンとラック、巻きつけプーリーとワイヤロープ等が含まれる。 Further, the “drive wheel and driven belt meshing with it” include a sprocket and chain, a pinion and a rack, a winding pulley and a wire rope, and the like.
以下、本発明を、パワーショベル機のアームを利用した地盤改良装置の実施例により、図面を参照して詳述する。
図１において、キャタピラ式走行台車（２）の上に機械体（３）を旋回自在に設置してなるベースマシン（１）において、上記機械体（３）から屈伸式アーム（４）を延出し、該アーム（４）は、基端部を軸支され、油圧シリンダ（５’）により上下揺動される第１アーム（５）と、基端部を第１アーム先端部に軸支され、油圧シリンダ（６’）により上下揺動される第２アーム（６）とからなり、該第２アーム（６）の先端部にブラケット（７）の基端部を軸支すると共に油圧シリンダ（７’）にて上下揺動自在に支持し、このブラケット（７）の先端部にホルダー（９）を固定し、該ホルダー（９）に、短小の掘削撹拌ヘッドロッド（１１）と、その上端に同一軸線上に接続された長軸ロッド（１２）とからなる長い掘削撹拌ロッド（１０）を、上記長軸ロッド（１２）において、長手方向に摺動自在に保持させてある。
Hereinafter, the present invention, Ri by the real 施例 of soil improvement apparatus using an arm of a power shovel machine, will be described in detail with reference to the drawings.
In FIG. 1, in a base machine (1) in which a machine body (3) is pivotably installed on a caterpillar type traveling carriage (2), a bendable arm (4) is extended from the machine body (3). The arm (4) is pivotally supported at the base end and is pivoted up and down by the hydraulic cylinder (5 ′), and the base end is pivotally supported at the tip of the first arm. The second arm (6) is pivoted up and down by a hydraulic cylinder (6 ′). The base end of the bracket (7) is pivotally supported at the distal end of the second arm (6) and the hydraulic cylinder (7 The holder (9) is fixed to the tip of the bracket (7), and a short excavation stirring head rod (11) is attached to the upper end of the holder (9). Long excavation agitation rod (10) consisting of a long axis rod (12) connected on the same axis In the long-rod (12), it is slidably is held in the longitudinal direction.
上記掘削撹拌ヘッドロッド（１１）は、横断面矩形の短小ロッド本体（１３）の下端部に、軸（１４）を、該ロッド本体（１３）の軸心線に対し直角に向けて、回転自在に支承し、該軸（１４）の左右突出端部に、先端に複数本の爪を有する十字形掘削撹拌翼（１５）、（１５）を固定し、その適宜上位において、上記ロッド本体（１３）に固定された油圧モータ（１６）、（１６）からチェンを介して掘削撹拌翼（１５）、（１５）に回転が伝達される。 The excavation and agitation head rod (11) is rotatable at the lower end of a short rod body (13) having a rectangular cross section with the axis (14) oriented perpendicular to the axis of the rod body (13). Are fixed to the right and left projecting ends of the shaft (14) with cross-shaped excavating and stirring blades (15) and (15) having a plurality of claws at the tip, and the rod body (13 The rotation is transmitted from the hydraulic motors (16) and (16) fixed to the drilling and stirring blades (15) and (15) through the chain.
上記長軸ロッド（１２）は、同じく横断面矩形の長尺ロッド本体（１７）の左右両側面に、該ロッド本体（１７）の上端から下端近くに及ぶ長さの従動ローラーチェン（１８）、（１８）を、ロッド本体長手方向に延長した状態で、ローラーチェン上、下端をロッド本体（１７）に固定してある。 The long-axis rod (12) has a driven roller chain (18) having a length extending from the upper end to the lower end of the rod body (17) on the left and right side surfaces of the long rod body (17) having a rectangular cross section. (18) is extended in the longitudinal direction of the rod body, and the lower end of the roller chain is fixed to the rod body (17).
（１９）は、固化液供給管で、上記長軸ロッド（１２）の上端から掘削撹拌ヘッドロッド（１１）下端まで、各ロッド（１２）、（１１）の前側面に添設され、下端に固化液放出口を開口している。 (19) is a solidification liquid supply pipe, which is attached to the front side of each rod (12), (11) from the upper end of the long-axis rod (12) to the lower end of the excavation stirring head rod (11), The solidified liquid discharge port is opened.
上記ホルダー（９）は次のような構造である。特に図２（ハ）に示すように、ホルダー（９）は、上記長軸ロッド本体（１７）に対応する横断面ほぼ矩形の四角筒状摺動ケース（２０）を有し、その左右両側面に、上記ローラーチェン（１８）、（１８）が侵入走行可能の幅をもつ四角筒状のギヤケース（２１）、（２１）を、上記ケース（２０）と全開通状態で、それぞれ突設してあり、この摺動ケース（２０）を上記長軸ロッド（１２）に長手方向に摺動自在に被嵌すると共に、該摺動ケース（２０）の背面を上記ブラケット（７）の先端部に固定してある。 The holder (9) has the following structure. In particular, as shown in FIG. 2 (c), the holder (9) has a rectangular cylindrical sliding case (20) having a substantially rectangular cross section corresponding to the long rod body (17). In addition, a rectangular cylindrical gear case (21), (21) having a width that allows the roller chains (18), (18) to enter and run is protruded from the case (20). The sliding case (20) is fitted to the long rod (12) so as to be slidable in the longitudinal direction, and the back surface of the sliding case (20) is fixed to the tip of the bracket (7). It is.
このように取りつけられたホルダー（９）のギヤケース（２１）、（２１）内には、同図（ロ）のように、駆動スプロケット（２２）及びその上下両側に案内スプロケット（２３）、（２３）を、上記ローラーチェン（１８）、（１８）の延長方向に沿って、それぞれ軸支すると共に、上記駆動スプロケット（２２）、（２２）の各軸は、上記ギヤケース（２１）、（２１）の外側面に設置された正逆回転式油圧モータ（２４）、（２４）の出力軸にそれぞれ接続し、又、上記案内スプロケット（２３）（２３）、（２３）（２３）の各軸は、同じくギヤケース（２１）、(２１)に固定された軸受（２５）（２５）、（２５）（２５）にそれぞれ支承してある。 In the gear case (21), (21) of the holder (9) attached in this manner, as shown in FIG. 5 (b), the drive sprocket (22) and the guide sprockets (23), (23 ) In the extension direction of the roller chains (18) and (18), and the shafts of the drive sprockets (22) and (22) are connected to the gear cases (21) and (21). Are connected to the output shafts of the forward and reverse rotating hydraulic motors (24) and (24) installed on the outer side surfaces of the guide sprockets (23), (23), (23) and (23), respectively. Similarly, they are supported by bearings (25), (25), (25) and (25) fixed to the gear cases (21) and (21), respectively.
それら上下一列に支承された案内スプロケット（２３）、駆動スプロケット（２２）及び案内スプロケット（２３）の２組に対し、上記２本の従動ローラーチェン（１８）、（１８）をギヤケース（２１）、（２１）へ導いて、案内スプロケット（２３）、（２３）から駆動スプロケット（２２）に山形にかみ合わせてある。 For the two sets of the guide sprocket (23), the drive sprocket (22) and the guide sprocket (23) supported in the upper and lower rows, the two driven roller chains (18) and (18) are connected to the gear case (21), Guided to (21), the guide sprockets (23), (23) are engaged with the drive sprocket (22) in a chevron shape.
従って、今、上記第１、第２アーム（５）、（６）により上記ホルダー（９）を昇降不能に保持した状態で、上記油圧モータ（２４）、（２４）の一方の正回転、他方の逆回転により、同図（ロ）における左側の駆動スプロケット（２２）を反時計方向へ、右側の駆動スプロケット（２２）を時計方向へそれぞれ回転させると、両駆動スプロケット（２２）、（２２）が上記従動ローラーチェン（１８）、（１８）を下方へ引張り、それにより掘削撹拌ロッド（１０）を降下させることとなる。 Therefore, now, with the first and second arms (5) and (6) holding the holder (9) so that it cannot be raised and lowered, When the left drive sprocket (22) in FIG. 6 (b) is rotated counterclockwise and the right drive sprocket (22) is rotated clockwise, the two drive sprockets (22), (22) Pulls the driven roller chain (18), (18) downward, thereby lowering the excavation stirring rod (10).
上例の作用を操作とともに説明する。図１の地盤改良装置において、油圧モータ（１６）、（１６）の回転により掘削撹拌翼（１５）、（１５）を回転させ、その状態で、第１アーム（５）、第２アーム（６）の屈伸操作により掘削撹拌ロッド（１０）を垂直に保ちつつ撹拌翼（１５）、(１５）により軟弱地盤への掘削を行うと共に、固化液を供給管（１９）を経て、下端の放出口から放出して掘削土砂と固化液の撹拌混合を開始する。 The operation of the above example will be described together with the operation. In the ground improvement device of FIG. 1, the excavating and stirring blades (15) and (15) are rotated by rotation of the hydraulic motors (16) and (16), and in this state, the first arm (5) and the second arm (6 ), The excavation stirring rod (10) is kept vertical while the excavation stirring rod (10) is kept vertical, and excavation is performed on the soft ground by the stirring blades (15) and (15). And start stirring and mixing of excavated sediment and solidified liquid.
図３（イ）のように、下端部の掘削撹拌ヘッドロッド（１１）部分が地中に掘進し、上記アーム（４）の屈伸のみによっては、これ以上掘進不能の深さに至ったときは、その位置でホルダー（９）を保持した状態で、ホルダー（９）の油圧モータ（２４）、（２４）の始動により、図２（ロ）における左側の駆動スプロケット（２２）を反時計方向へ、右側の駆動スプロケット（２２）を時計方向へそれぞれ回転させ、それにより従動ローラーチェン（１８）、（１８）を下方へ引張って掘削撹拌ロッド（１０）をホルダー（９）の摺動ケース（２０）内を摺動して降下させ、さらなる掘削撹拌混合を再開する。同図（ロ）のように、長軸ロッド（１２）全長が地中に掘進する最深位置まで掘進が可能である。 When the excavation and stirring head rod (11) portion at the lower end digs into the ground as shown in FIG. 3 (a), and the arm (4) is bent and stretched, the depth of the excavation is not reached any more. With the holder (9) held in that position, the hydraulic motors (24) and (24) of the holder (9) are started, whereby the left drive sprocket (22) in FIG. , The right drive sprocket (22) is rotated clockwise, thereby pulling the driven roller chains (18), (18) downward to bring the excavation stirring rod (10) into the sliding case (20) of the holder (9). ) Slide down to resume further excavation and agitation mixing. As shown in the figure (b), the long shaft rod (12) can be dug up to the deepest position where the full length is dug into the ground.
所望深さまでの掘削、撹拌混合が完了したら、上記油圧モータ（２４）、（２４）の上記と反対方向への回転により同図（ロ）における左側駆動スプロケット（２２）を反時計方向へ、右側駆動スプロケット（２２）を時計方向へそれぞれ回転させ、それにより従動チェン（１８）、（１８）を上方へ引張って掘削撹拌ロッド（１０）を上昇させ、地上に引き抜く。 When excavation and stirring and mixing to the desired depth are completed, the left drive sprocket (22) in the same figure (b) is rotated counterclockwise to the right by rotating the hydraulic motors (24) and (24) in the opposite direction. The drive sprocket (22) is rotated clockwise, respectively, thereby pulling the driven chains (18), (18) upward to raise the excavation stirring rod (10) and pull it out to the ground.
１…ベースマシン、４…屈伸式アーム、９…ホルダー、１０…掘削撹拌ロッド、１１…掘削撹拌ヘッドロッド、１２…長軸ロッド、１５…掘削撹拌翼、１６…油圧モータ、１８…従動ローラーチェン、２２…駆動スプロケット、２４…正逆回転式油圧モータ。 DESCRIPTION OF SYMBOLS 1 ... Base machine, 4 ... Bending-extending arm, 9 ... Holder, 10 ... Drilling stirring rod, 11 ... Drilling stirring head rod, 12 ... Long axis rod, 15 ... Drilling stirring blade, 16 ... Hydraulic motor, 18 ... Driven roller chain , 22 ... drive sprocket, 24 ... forward / reverse rotating hydraulic motor.
Claims (1)
上記掘削攪拌ロッドを、ベースマシンに突設された支持部材にホルダーを介して昇降自在に保持させ、
上記ホルダーに、駆動輪及び該駆動輪を回転させる正逆回転モータを設けると共に、上記長軸ロッドに、上記駆動輪とかみ合って長軸ロッド上端部からほぼ下端部まで延長する従動帯を敷設し、上記駆動輪の回転により上記従動帯を介して上記掘削攪拌ロッドを昇降させる地盤改良装置を使用し、
上記掘削撹拌翼の回転により軟弱地盤へ掘削を行うと共に、固化液を注入して該固化液と掘削土砂との撹拌混合を行いつつ掘進していき、
上記掘削撹拌ヘッドロッド全長を地中に掘進したら、上記ホルダーを保持した状態で、上記駆動輪の回転により上記従動帯を下方へ引張って上記長軸ロッドを降下させ、それにより上記掘削撹拌ヘッドロッドを地中に押しこんで、さらなる掘削、撹拌を継続し、
所望深さまで掘削、撹拌を行ったら、上記駆動輪の逆回転により上記従動帯を上方へ引張って上記長軸ロッドを上昇させ、それに伴って上記掘削撹拌ヘッドロッドを地上に引き抜く、
地盤改良工法。 A long excavation agitation rod is formed by connecting a long axis rod on the same axis on the upper end of an excavation agitation head rod provided with a motor that supports the excavation agitation blade at the lower end and rotates the excavation agitation blade ,
The excavation stirring rod is held by a support member projecting from the base machine so as to be movable up and down through a holder,
The holder is provided with a drive wheel and a forward / reverse rotation motor for rotating the drive wheel, and a long belt is engaged with the drive wheel and a driven belt extending from the upper end portion of the long shaft rod to the substantially lower end portion is laid on the holder. , Using a ground improvement device that raises and lowers the excavation stirring rod through the driven belt by rotation of the drive wheel,
While excavating to the soft ground by the rotation of the excavation stirring blade, the solidification liquid is injected, and the solidification liquid and excavation earth and sand are stirred and mixed,
After excavating the entire length of the excavation agitation head rod into the ground, while holding the holder, the driven wheel is pulled downward to pull the driven belt downward to lower the long axis rod, thereby the excavation agitation head rod And continue drilling and stirring,
After excavating and stirring to a desired depth, pulling the driven belt upward by reverse rotation of the drive wheel to raise the long rod, and accordingly pulling the excavation stirring head rod to the ground,
Ground improvement method .
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| JP3373815B2 (en) * | 1998-09-18 | 2003-02-04 | 株式会社加藤建設 | Ground improvement equipment |
| JP2008255616A (en) * | 2007-04-03 | 2008-10-23 | Tokki Kogyo Kk | Multiple rod-type shallow-ground improving method and multiple rod-type shallow-ground improving machine |
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