JP4804772B2 - Ground improvement device - Google Patents

Ground improvement device Download PDF

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JP4804772B2
JP4804772B2 JP2005062445A JP2005062445A JP4804772B2 JP 4804772 B2 JP4804772 B2 JP 4804772B2 JP 2005062445 A JP2005062445 A JP 2005062445A JP 2005062445 A JP2005062445 A JP 2005062445A JP 4804772 B2 JP4804772 B2 JP 4804772B2
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guide frame
frame
nozzle
ground
improvement device
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JP2006241935A (en
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淳 大林
修二 磯谷
洋 仁田尾
馨一 田中
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Fudo Tetra Corp
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Fudo Tetra Corp
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  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a soil improvement device by which lap work of a joint part with an existing improvement body can be carried out easily, surely and in a short time. <P>SOLUTION: The soil improvement device 10 comprises an endless chain 40 having a plurality of excavation bits 41 fitted thereto, a guide frame 30 to which the endless chain is rotatably mounted, a nozzle 50 mounted on the guide frame to inject an improvement material W, a supporting frame 20 supporting the guide frame to be movable in up and down directions, and a running vehicle 22 to which the supporting frame is fitted. After the endless chain is inserted into the ground 7 by moving the guide frame 30 down, the running vehicle is made to run and the endless chain is rotated. A channel M is dug and the improvement material injected through the nozzle and the in-situ soil 8 of the ground are mixed together and stirred by the excavation bits of the rotating endless chain to form an improvement body 9 in the ground. In the soil improvement device 10, the nozzle 50 is swingably mounted on a front end of the guide frame 30. <P>COPYRIGHT: (C)2006,JPO&amp;NCIPI

Description

本発明は、回転するエンドレスチェーン等の無限端移動体の複数の掘削ビット等の掘削突起を介して溝の掘削及びノズルから噴射される固化材等の改良材と地盤の原位置土との混合攪拌を行って地盤中に連続壁等の改良体を造成するようにした地中連続壁造成装置等の地盤改良装に関する。 The present invention relates to mixing of an improved material such as a solidified material injected from a nozzle and a ground with an in-situ in situ soil through excavation protrusions such as a plurality of excavation bits of an infinite end moving body such as a rotating endless chain performing stirring about ground improvement equipment such as underground continuous wall Construction apparatus adapted to construct a modified body of a continuous wall or the like in the ground.

この種の地中連続壁造成装置として、図19(a)〜(c)に示すものがある(例えば、特許文献1参照)。   As this kind of underground continuous wall construction apparatus, there is an apparatus shown in FIGS. 19A to 19C (see, for example, Patent Document 1).

この地中連続壁造成装置1は、図19(a)に示すように、走行車両2に対してエンドレスチェーン式カッター3を昇降駆動できるように設けてある。   As shown in FIG. 19A, the underground continuous wall forming apparatus 1 is provided so that the endless chain cutter 3 can be driven up and down with respect to the traveling vehicle 2.

そして、図19(b)に示すように、エンドレスチェーン式カッター3を地盤7の所望の深さまで押し下げ、次に、走行車両2を矢印Iの方向に移動させる。これにより、地盤7を掘削しながら、図19(c)に示すように、エンドレスチェーン式カッター3のガイドポスト4内に設けた管5を介してセメントミルク等の硬化液6を噴出することにより、現位置において土砂8と硬化液6とを混合してソイルセメント壁体9を造成して地中連続壁を構築するようになっている。
特開平5−280043号公報 特開平5−17946号公報
Then, as shown in FIG. 19 (b), the endless chain cutter 3 is pushed down to a desired depth of the ground 7, and then the traveling vehicle 2 is moved in the direction of arrow I. As a result, while excavating the ground 7, as shown in FIG. 19C, the hardened liquid 6 such as cement milk is ejected through the pipe 5 provided in the guide post 4 of the endless chain cutter 3. At the present position, the earth and sand 8 and the hardening liquid 6 are mixed to form a soil cement wall body 9 to construct an underground continuous wall.
Japanese Patent Laid-Open No. 5-280043 Japanese Patent Laid-Open No. 5-17946

しかしながら、前記従来の地中連続壁造成装置1では、図20(a)に示すように、既設の固化したソイルセメント壁体9に新たなソイルセメント壁体9′を構築する場合に、既設の固化したソイルセメント壁体9の継ぎ目部分(接合部)9aを凹状に若干削り込んだ後でなければ、その遮水性を確保することが困難であり、また、施工が煩雑であった。さらに、地中連続壁造成装置1による地中連続壁の構築場所を別の場所で行うには、走行車両2からエンドレスチェーン式カッター3を分解し、新しい構築場所でその都度組み立てなければならないため、作業が煩雑であった。   However, in the conventional underground continuous wall construction apparatus 1, as shown in FIG. 20 (a), when a new soil cement wall body 9 ′ is constructed on the existing solid cement wall body 9, Unless the seam portion (joint portion) 9a of the solid soil cement wall body 9 is slightly shaved into a concave shape, it is difficult to ensure the water shielding property, and the construction is complicated. Furthermore, in order to perform the construction of the underground continuous wall by the underground continuous wall construction apparatus 1 at another location, the endless chain cutter 3 must be disassembled from the traveling vehicle 2 and assembled at each new construction location. The work was complicated.

そこで、本発明は、前記した課題を解決すべくなされたものであり、既設の改良体との接合部のラップ施工を容易かつ確実に短時間で行うことができ、また、分解することなく施工場所を替えることができる経済性に優れた地盤改良装を提供することを目的とする。 Therefore, the present invention has been made to solve the above-mentioned problems, and can lap construction of a joint portion with an existing improved body easily and reliably in a short time, and can be performed without disassembling. and to provide a good ground improvement equipment economical capable changing the location.

請求項1の発明は、複数の掘削突起を取り付けた縦型で環状の無限端移動体と、この環状の無限端移動体を回転自在に設けると共に、上下方向に延びたガイドフレームと、このガイドフレームに設けられ、改良材を噴射させるノズルと、前記ガイドフレームを昇降動自在に支持した支持フレームと、この支持フレームを取り付けた走行車両とを備え、前記ガイドフレームを下降させて地盤中に前記無限端移動体を挿入した後で、前記走行車両を走行させると共に前記無限端移動体を回転させ、この回転する無限端移動体の複数の掘削突起を介して溝の掘削及び前記ノズルから噴射される改良材と前記地盤の原位置土との混合攪拌を行って前記地盤中に改良体を造成するようにした地盤改良装置において、前記ガイドフレームを昇降動自在に支持した前記支持フレームを前記走行車両に対して起立状態から水平の傾倒状態に移動自在に設けたことを特徴とする。 The invention according to claim 1 is a vertical annular endless moving body having a plurality of excavation projections attached thereto, the annular infinite end moving body provided rotatably, and a guide frame extending in the vertical direction, and the guide A nozzle provided on the frame for injecting the improvement material; a support frame that supports the guide frame so as to be movable up and down; and a traveling vehicle to which the support frame is attached; and the guide frame is lowered to enter the ground. After the infinite end moving body is inserted, the traveling vehicle is driven and the infinite end moving body is rotated, and a groove is excavated through the plurality of excavation protrusions of the rotating infinite end moving body and injected from the nozzle. In the ground improvement device in which an improved body is formed in the ground by mixing and agitating the improvement material and the in-situ soil of the ground, the guide frame is supported in a freely movable manner. Wherein from the standing state to the support frame with respect to the traveling vehicle that is provided movably in the horizontal tilting state.

請求項2の発明は、請求項1記載の地盤改良装置であって、前記ガイドフレームに前記ノズルを動自在に設けたことを特徴とする。 The invention of claim 2, met soil improvement apparatus according to claim 1, characterized in that the said nozzle guide frame disposed for free swinging.

請求項3の発明は、請求項1記載の地盤改良装置であって、記ガイドフレームに前記ノズルを横方向に往復移動自在に設けたことを特徴とする。 The invention of claim 3, met soil improvement apparatus according to claim 1, characterized by providing freely reciprocating the nozzle transversely serial guide frame.

請求項4の発明は、請求項1記載の地盤改良装置であって、前記ガイドフレームに前記ノズルを横方向にスリット状に設けたことを特徴とする。 The invention according to claim 4 is the ground improvement device according to claim 1 , characterized in that the nozzle is provided in the guide frame in a slit shape in the lateral direction .

以上説明したように、請求項1の発明の地盤改良装置によれば、ガイドフレームを昇降動自在に支持した支持フレームを走行車両に対して起立状態から水平の傾倒状態に移動自在に設けたことにより、分解することなく施工場所を替えることができる。 As described above, according to the ground improvement device of the first aspect of the present invention, the support frame supporting the guide frame so as to be movable up and down is provided so as to be movable from the standing state to the horizontal tilted state with respect to the traveling vehicle. Therefore, the construction place can be changed without disassembling.

請求項2の発明の地盤改良装置によれば、複数の掘削突起を取り付けた縦型で環状の無限端移動体を回転自在に設けると共に、上下方向に延びたガイドフレームに改良材を噴射させるノズルを動自在に設けたことにより、既設の改良体との接合部に動するノズルから改良材を噴射させてそのラップ施工を容易かつ確実に短時間で行うことができる。 According to the ground improvement device of the second aspect of the present invention, the vertical and annular infinite end movable body having a plurality of excavation projections is rotatably provided, and the nozzle for injecting the improvement material onto the guide frame extending in the vertical direction the by providing freely swing, by injecting the modifying material from a nozzle rocking the junction of the existing improvement body can perform its wrap construction easily and reliably in a short time.

請求項3の発明の地盤改良装置によれば、複数の掘削突起を取り付けた縦型で環状の無限端移動体を回転自在に設けると共に、上下方向に延びたガイドフレームに改良材を噴射させるノズルを横方向に往復移動自在に設けたことにより、既設の改良体との接合部に横方向に往復移動するノズルから改良材を噴射させてそのラップ施工を容易かつ確実に短時間で行うことができる。 According to the ground improvement device of the invention of claim 3, the vertical and annular infinite end movable body to which a plurality of excavation protrusions are attached is rotatably provided, and the improvement material is injected into the guide frame extending in the vertical direction. the by providing reciprocally move laterally, be performed in a short time the wrap construction easily and reliably by injection of the modifying material from a nozzle reciprocates transversely to the junction between the existing improvement body it can.

請求項4の発明の地盤改良装置によれば、複数の掘削突起を取り付けた縦型で環状の無限端移動体を回転自在に設けると共に、上下方向に延びたガイドフレームに改良材を噴射させるノズルを横方向にスリット状に設けたことにより、既設の改良体との接合部に横方向にスリット状に設けたノズルから改良材を噴射させてそのラップ施工を容易かつ確実に短時間で行うことができる。 According to the ground improvement device of the invention of claim 4, a vertical annular endless moving body having a plurality of excavation protrusions is rotatably provided, and a nozzle for injecting the improvement material onto a guide frame extending in the vertical direction By providing a slit in the lateral direction, the improvement material is sprayed from the nozzle provided in the slit direction in the lateral direction at the joint with the existing improved body, and the lap construction can be performed easily and reliably in a short time. the Ru can.

以下、本発明の実施形態を図面に基づいて説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図1は本発明の実施形態の実施形態の地中連続壁造成装置を示す側面図、図2は同地中連続壁造成装置の平面図、図3は同地中連続壁造成装置に用いられるガイドフレームと支持フレームの斜視図、図4は同支持フレームの移動枠の断面図、図5は同支持フレームの固定枠の断面図、図6は同支持フレームの下降前の状態を示す側面図、図7は同支持フレームの移動枠を1ピッチ上昇させた状態を示す側面図、図8は同支持フレームの移動枠をロックして固定枠を1ピッチ上昇させた状態を示す側面図、図9は同支持フレームの固定枠をロックして移動枠を1ピッチ上昇させた状態を示す側面図、図10は同地中連続壁造成装置のノズル配置部分の説明図、図11は同ガイドフレームに回転自在に支持される環状のエンドレスチェーンに取り付けられた掘削ビットの斜視図、図12は同環状のエンドレスチェーンに取り付けられた他の掘削ビットの斜視図、図13は同ガイドフレームを地上に起立させた状態を示す側面図、図14は同ガイドフレームの傾倒途中の状態を示す側面図、図15は同ガイドフレームを水平に傾倒させた状態を示す側面図である。   FIG. 1 is a side view showing an underground continuous wall generating apparatus according to an embodiment of the present invention, FIG. 2 is a plan view of the underground continuous wall generating apparatus, and FIG. 3 is used for the underground continuous wall generating apparatus. FIG. 4 is a cross-sectional view of a moving frame of the support frame, FIG. 5 is a cross-sectional view of a fixed frame of the support frame, and FIG. 6 is a side view showing a state before the support frame is lowered. 7 is a side view showing a state in which the moving frame of the support frame is raised by one pitch, and FIG. 8 is a side view showing a state in which the moving frame of the support frame is locked and the fixed frame is raised by one pitch. 9 is a side view showing a state where the fixed frame of the support frame is locked and the moving frame is raised by one pitch, FIG. 10 is an explanatory view of the nozzle arrangement portion of the underground continuous wall forming device, and FIG. 11 is the guide frame It is attached to an annular endless chain that is rotatably supported by FIG. 12 is a perspective view of another excavation bit attached to the annular endless chain, FIG. 13 is a side view showing the guide frame standing on the ground, and FIG. FIG. 15 is a side view showing a state in which the guide frame is tilted horizontally. FIG.

図1及び図2に示すように、地中連続壁造成装置(地盤改良装置)10は、施工機本体(走行車両)11とを備えている。この施工機本体11は旋回台12を介して旋回自在になっていると共に、一対のクローラ13,13を介して走行自在になっている。また、図1,図2及び図13〜図15に示すように、施工機本体11の前側中央には、支持フレーム20を起立及び傾倒自在に取り付けてある。   As shown in FIGS. 1 and 2, the underground continuous wall forming device (ground improvement device) 10 includes a construction machine main body (traveling vehicle) 11. The construction machine main body 11 is turnable via a turntable 12 and can be run via a pair of crawlers 13 and 13. As shown in FIGS. 1, 2, and 13 to 15, a support frame 20 is attached to the front center of the construction machine body 11 so as to be able to stand up and tilt.

この支持フレーム20は、図1〜図5に示すように、断面ロ字状の固定枠21と、この固定枠21の後部中央より下方に延びる断面H字状のガイド板22の両側の凹部22a,22a内に沿って両側の凸部24b,24bをスライドさせて上下方向に移動する断面コ字状の移動枠24とを備えている。この固定枠21の後部中央のガイド板22の背面の上側には円弧状のアーム板23の基端23aを固定してあり、このアーム板23の先端23bは施工機本体11に支軸14を介して回動自在に支持してある。また、ガイド板22の背面の下側には傾倒用の油圧シリンダ15のピストンロッド15aの先端をピン枢支してある。この傾倒用の油圧シリンダ15の基端部15bは施工機本体11の前側中央にピン枢支してある。この傾倒用の油圧シリンダ15のピストンロッド15aの伸縮により支持フレーム20は施工機本体11に対して起立及び傾倒自在になっている。   As shown in FIGS. 1 to 5, the support frame 20 includes a fixed frame 21 having a square cross section and recesses 22 a on both sides of a guide plate 22 having an H cross section extending downward from the rear center of the fixed frame 21. , 22a is provided with a moving frame 24 having a U-shaped cross section that moves in the vertical direction by sliding the convex portions 24b, 24b on both sides. A base end 23 a of an arc-shaped arm plate 23 is fixed to the upper side of the back surface of the guide plate 22 at the center of the rear portion of the fixed frame 21, and the tip 23 b of the arm plate 23 attaches the support shaft 14 to the construction machine main body 11. It is supported via a pivot. A tip of the piston rod 15a of the tilting hydraulic cylinder 15 is pivotally supported on the lower side of the back surface of the guide plate 22. A base end portion 15 b of the tilting hydraulic cylinder 15 is pivotally supported at the front center of the construction machine main body 11. The support frame 20 can stand up and tilt with respect to the construction machine main body 11 by expansion and contraction of the piston rod 15 a of the tilting hydraulic cylinder 15.

また、支持フレーム20の固定枠21の両側部と移動枠24の両側部との間には、ガイドフレーム昇降用の一対の油圧シリンダ25,25を介在してある。この各油圧シリンダ25の基端部25aは固定枠21の側部にピン枢支してあると共に、該各油圧シリンダ25のピストンロッド25bの先端部は移動枠24の側部にピン枢支してある。また、図3及び図5に示すように、固定枠21の両側部には円形の丸孔21aを形成してあり、この各丸孔21aの周りの固定枠21の側部にはロック用の油圧シリンダ26を取り付けてある。このロック用の油圧シリンダ26のピストンロッド26aの先端にロックピン26bを固定してあり、このロックピン26bはピストンロッド26aの後退時に丸孔21a内に収納自在になっている。さらに、図3及び図4に示すように、移動枠24の両側部には円形の丸孔24aを形成してあり、この各丸孔24aの周りの移動枠24の側部にはロック用の油圧シリンダ27を取り付けてある。このロック用の油圧シリンダ27のピストンロッド27aの先端にはロックピン27bを固定してあり、このロックピン27bはピストンロッド27aの後退時に丸孔24a内に収納自在になっている。尚、図5中符号28は固定枠21の側部の丸孔21aの内側に連通するように該側部に埋設された円筒状のブッシュであり、また、図4中符号29は移動枠24の側部の丸孔24aの内側に連通するように該側部に埋設された円筒状のブッシュである。   A pair of hydraulic cylinders 25 and 25 for raising and lowering the guide frame are interposed between both sides of the fixed frame 21 of the support frame 20 and both sides of the moving frame 24. The base end portion 25 a of each hydraulic cylinder 25 is pivotally supported on the side portion of the fixed frame 21, and the distal end portion of the piston rod 25 b of each hydraulic cylinder 25 is pivotally supported on the side portion of the moving frame 24. It is. Further, as shown in FIGS. 3 and 5, circular round holes 21 a are formed on both sides of the fixed frame 21, and locking portions are provided on the side portions of the fixed frame 21 around the round holes 21 a. A hydraulic cylinder 26 is attached. A lock pin 26b is fixed to the tip of the piston rod 26a of the hydraulic cylinder 26 for locking, and the lock pin 26b can be stored in the round hole 21a when the piston rod 26a is retracted. Further, as shown in FIG. 3 and FIG. 4, circular round holes 24 a are formed on both sides of the moving frame 24, and the side of the moving frame 24 around each round hole 24 a is used for locking. A hydraulic cylinder 27 is attached. A lock pin 27b is fixed to the tip of the piston rod 27a of the locking hydraulic cylinder 27, and the lock pin 27b can be stored in the round hole 24a when the piston rod 27a is retracted. 5 denotes a cylindrical bush embedded in the side portion so as to communicate with the inside of the round hole 21a on the side portion of the fixed frame 21, and reference numeral 29 in FIG. It is a cylindrical bush embedded in the side portion so as to communicate with the inside of the round hole 24a on the side portion.

さらに、図1〜図9に示すように、支持フレーム20の固定枠21内と移動枠24内には、上下方向に延びるガイドフレーム30を昇降動自在に支持してある。このガイドフレーム30の両側間の中央には、上下方向に等間隔毎に断面円形の貫通孔31をそれぞれ形成してある。この各貫通孔31の両側には該各貫通孔31と連通するように円筒状の一対のブッシュ32,32を埋設してある。この各一対のブッシュ32,32内には、固定枠21のロック用の油圧シリンダ26のロックピン26b及び移動枠24のロック用の油圧シリンダ27のロックピン27bがそれぞれ収納及び退出自在になっている。   Further, as shown in FIGS. 1 to 9, a guide frame 30 extending in the vertical direction is supported in the fixed frame 21 and the moving frame 24 of the support frame 20 so as to be movable up and down. In the center between both sides of the guide frame 30, through holes 31 having a circular cross section are formed at equal intervals in the vertical direction. A pair of cylindrical bushes 32 and 32 are embedded on both sides of each through hole 31 so as to communicate with each through hole 31. In each of the pair of bushes 32, 32, a lock pin 26b of the hydraulic cylinder 26 for locking the fixed frame 21 and a lock pin 27b of the hydraulic cylinder 27 for locking the moving frame 24 can be stored and withdrawn, respectively. Yes.

また、図10〜図12に示すように、ガイドフレーム30の前後側には、例えば、3つのガイド凸部33を設けてあり、この各ガイド凸部33には縦型で環状のエンドレスチェーン(無限端移動体)40をそれぞれ回転移動自在に支持してある。図1に示すように、この各エンドレスチェーン40は、ガイドフレーム30の上端部に設けられたチェーン駆動用のモータ34により回転する駆動スプロケット35とガイドフレーム30の下端部に設けられた従動スプロケット36との間に掛け渡されている。さらに、図10〜図12に示すように、両側に位置する各エンドレスチェーン40には掘削ビット(掘削突起)41を等間隔毎に複数取り付けてある。また、中央に位置するエンドレスチェーン40には掘削ビット(掘削突起)42を等間隔毎に複数取り付けてある。   10 to 12, for example, three guide convex portions 33 are provided on the front and rear sides of the guide frame 30, and each guide convex portion 33 has a vertical, annular endless chain ( Infinite end moving bodies) 40 are supported so as to be freely rotatable. As shown in FIG. 1, each endless chain 40 includes a drive sprocket 35 that is rotated by a chain drive motor 34 provided at the upper end portion of the guide frame 30 and a driven sprocket 36 provided at the lower end portion of the guide frame 30. It is spanned between. Further, as shown in FIGS. 10 to 12, a plurality of excavation bits (excavation projections) 41 are attached to each endless chain 40 located on both sides at equal intervals. A plurality of excavation bits (excavation protrusions) 42 are attached to the endless chain 40 located at the center at equal intervals.

さらに、図3及び図10に示すように、ガイドフレーム30の先端(下端)には、開口部37を設けてあり、この開口部37内にセメントミルク等の固化液(改良材)Wを噴射させるノズル50を揺動自在に設けてある。即ち、このノズル50のノズル本体51は支軸52を介して開口部37内の取付フレーム38に揺動自在に支持されている。また、取付フレーム38には揺動用の油圧シリンダ53の基端部53aをピン枢支してあり、この油圧シリンダ53のピストンロッド53bの先端にはノズル本体51の基端部51aをピン枢支してある。そして、この油圧シリンダ53のピストンロッド53bの伸縮動によりノズル本体51を支軸52を中心として水平方向に揺動するようになっている。尚、ノズル本体51のノズル噴射口51bは開口部37に位置している。また、ノズル本体51の中途部にはセメントミルク等の固化液Wを供給するチューブ54を接続してある。   Further, as shown in FIGS. 3 and 10, an opening 37 is provided at the tip (lower end) of the guide frame 30, and a solidified liquid (improvement material) W such as cement milk is injected into the opening 37. A nozzle 50 is provided so as to be swingable. That is, the nozzle body 51 of the nozzle 50 is supported by the mounting frame 38 in the opening 37 through the support shaft 52 so as to be swingable. Further, a base end portion 53 a of a swing hydraulic cylinder 53 is pivotally supported on the mounting frame 38, and a base end portion 51 a of a nozzle body 51 is pivotally supported at the tip of a piston rod 53 b of the hydraulic cylinder 53. It is. The nozzle body 51 is swung horizontally around the support shaft 52 by the expansion and contraction of the piston rod 53b of the hydraulic cylinder 53. The nozzle injection port 51 b of the nozzle body 51 is located in the opening 37. Further, a tube 54 for supplying a solidified liquid W such as cement milk is connected to the middle part of the nozzle body 51.

以上実施形態の地中連続壁造成装置10によれば、地盤7に地中連続壁(改良体)9を施工する場合に、まず、支持フレーム20の固定枠21と移動枠24の移動によりガイドフレーム30を下降させて地盤9中にエンドレスチェーン40を挿入する。   According to the underground continuous wall forming apparatus 10 of the above embodiment, when the underground continuous wall (improved body) 9 is constructed on the ground 7, first, the guide is provided by the movement of the fixed frame 21 and the moving frame 24 of the support frame 20. The frame 30 is lowered and the endless chain 40 is inserted into the ground 9.

この際のガイドフレーム30の下降動作を、図6〜図9を用いて説明する。図6に示すように、ガイドフレーム30の最下位置では、支持フレーム20の固定枠21の各油圧シリンダ26のロックピン26bがガイドフレーム30の貫通孔31内のブッシュ32内に挿入されてロック状態になっている(図5に示すロック状態)。また、移動枠24の各油圧シリンダ27のロックピン27bがガイドフレーム30の貫通孔31内のブッシュ32内に挿入されてロック状態になっている(図4に示すロック状態)。この両ロック状態では、ガイドフレーム昇降用の各油圧シリンダ25のピストンロッド25bは伸びている。この状態より、支持フレーム20の移動枠24の各油圧シリンダ27のロックピン27bをガイドフレーム30の貫通孔31内のブッシュ32内より退出させてアンロック状態にし、図7に示すように、ガイドフレーム昇降用の各油圧シリンダ25のピストンロッド25bを縮めて、移動枠24をガイド板22に沿って1ピッチ上方へ移動させる。   The lowering operation of the guide frame 30 at this time will be described with reference to FIGS. As shown in FIG. 6, at the lowest position of the guide frame 30, the lock pin 26 b of each hydraulic cylinder 26 of the fixed frame 21 of the support frame 20 is inserted into the bush 32 in the through hole 31 of the guide frame 30 and locked. It is in a state (locked state shown in FIG. 5). Further, the lock pin 27b of each hydraulic cylinder 27 of the moving frame 24 is inserted into the bush 32 in the through hole 31 of the guide frame 30 and is locked (the locked state shown in FIG. 4). In both the locked states, the piston rod 25b of each hydraulic cylinder 25 for raising and lowering the guide frame extends. From this state, the lock pin 27b of each hydraulic cylinder 27 of the moving frame 24 of the support frame 20 is withdrawn from the bush 32 in the through hole 31 of the guide frame 30 to the unlocked state, and as shown in FIG. The piston rod 25b of each hydraulic cylinder 25 for raising and lowering the frame is contracted, and the moving frame 24 is moved upward by one pitch along the guide plate 22.

次に、移動枠24の各油圧シリンダ27のロックピン27bをロック状態すると共に、固定枠21の各油圧シリンダ26のロックピン26bのロック状態を解除し、ガイドフレーム昇降用の各油圧シリンダ25のピストンロッド25bを伸ばして、図8に示すように、移動枠2をガイド板22に沿って1ピッチ方へ移動させる。その後、固定枠21の各油圧シリンダ26のロックピン26bをロック状態にすると共に、移動枠24の各油圧シリンダ27のロックピン27bをロック状態を解除し、図9に示すように、ガイドフレーム昇降用の各油圧シリンダ25のピストンロッド25bを縮めると、ガイドフレーム30が2ピッチ分下降する。この動作を順次繰り返すことで、ガイドフレーム30を地盤7中の所定の深度まで下降させる。尚、ガイドフレーム30を上方させる場合には、上記逆動作を繰り返し行う。 Next, the lock pins 27b of the hydraulic cylinders 27 of the moving frame 24 are locked, and the lock pins 26b of the hydraulic cylinders 26 of the fixed frame 21 are released. extend the piston rod 25b, as shown in FIG. 8, along the moving frame 2 4 the guide plate 22 is moved towards under one pitch. Thereafter, the lock pins 26b of the hydraulic cylinders 26 of the fixed frame 21 are brought into the locked state, and the lock pins 27b of the hydraulic cylinders 27 of the moving frame 24 are released from the locked state. As shown in FIG. When the piston rod 25b of each hydraulic cylinder 25 is contracted, the guide frame 30 is lowered by two pitches. By sequentially repeating this operation, the guide frame 30 is lowered to a predetermined depth in the ground 7. When the guide frame 30 is moved upward, the reverse operation is repeated.

図1に示すように、ガイドフレーム30を地盤7中の所定の深度まで下降させた後で、施工機本体11を横方向に走行させると共に、エンドレスチェーン40を回転させる。この際に、回転するエンドレスチェーン40に取り付けられた複数の掘削ビット41,42を介して溝Mの掘削及びノズル50から噴射される固化液Wと地盤7の原位置土8との混合・攪拌を行って、地盤7中にソイルセメント壁の連続壁9を効率的に造成する。   As shown in FIG. 1, after the guide frame 30 is lowered to a predetermined depth in the ground 7, the construction machine main body 11 travels in the lateral direction and the endless chain 40 is rotated. At this time, the excavation of the groove M through a plurality of excavation bits 41, 42 attached to the rotating endless chain 40 and the mixing / stirring of the solidified liquid W sprayed from the nozzle 50 and the in-situ soil 8 of the ground 7 are performed. The continuous wall 9 of the soil cement wall is efficiently created in the ground 7.

そして、図20(b)に示すように、既設の固化した地中連続壁9に新たな地中連続壁9′を接合するようにラップ施工する場合には、既設の地中連続壁9の継ぎ目部分(接合部)の地盤7中にガイドフレーム30を下降させて複数の掘削ビット41,42を取り付けたエンドレスチェーン40を回転させながら挿入する。   As shown in FIG. 20 (b), when lap construction is performed so that a new underground continuous wall 9 'is joined to the existing solid continuous underground wall 9, the existing underground continuous wall 9 The endless chain 40 to which the plurality of excavation bits 41 and 42 are attached is rotated and inserted into the ground 7 of the joint portion (joint portion) while being lowered.

次に、エンドレスチェーン40の回転を停止させた状態でガイドフレーム30を引き抜く。このガイドフレーム30の引き抜きの際に、ノズル50を油圧シリンダ53を介して揺動させて固化液Wを噴射させる。そして、既設の固化した地中連続壁9との継ぎ目部分に地上まで固化液Wを噴射させてラップ施工を施す。この際、図20(a)に示す従来例のように、既設の固化したソイルセメント壁体9の継ぎ目部分9aを凹状に削り込む必要がなく、既設の固化した地中連続壁9との継ぎ目部分のラップ施工を容易かつ確実に短時間で行うことができる。また、既設の固化した地中連続壁9との継ぎ目部分に地上まで固化液Wを効率良く噴射させることができるため、ラップ施工の経済性を高めることができると共に、既設の固化した地中連続壁9との継ぎ目部分の遮水性を十分に確保することができる。   Next, the guide frame 30 is pulled out in a state where the rotation of the endless chain 40 is stopped. When the guide frame 30 is pulled out, the nozzle 50 is swung through the hydraulic cylinder 53 to inject the solidified liquid W. Then, the solidification liquid W is sprayed to the ground at the joint portion between the existing solid continuous wall 9 and the lapping is performed. At this time, unlike the conventional example shown in FIG. 20 (a), it is not necessary to cut the seam portion 9a of the existing solid cement wall body 9 into a concave shape, and the seam with the existing solid continuous underground wall 9 is obtained. The lap construction of the part can be performed easily and reliably in a short time. Moreover, since the solidification liquid W can be efficiently injected to the joint part with the existing solid continuous underground wall 9 to the ground, it is possible to improve the economic efficiency of the lap construction and to improve the existing solid continuous underground. It is possible to sufficiently ensure the water shielding property of the joint portion with the wall 9.

また、図13〜図15に示すように、施工機本体11に対してガイドフレーム30を昇降動自在に支持した支持フレーム20を介して該ガイドフレーム30を図13に示す起立状態から図15に示す水平の傾倒状態にすることにより、従来のように、分解することなく施工場所を替えることができる。このガイドフレーム30を倒す際に、図14に示すように、ガイドフレーム30を少し傾斜させた状態で下降させる。そして、ガイドフレーム30の重心位置が支持枠20の一対の固定枠21と移動枠24間の中央に合ったところで傾倒用の油圧シリンダ15のピストンロッド15aを伸ばし、施工機本体11の上方に水平に倒す。これにより、施工機本体11の転倒を防ぐことができる。   Further, as shown in FIGS. 13 to 15, the guide frame 30 is moved from the standing state shown in FIG. 13 to the FIG. By making the horizontal tilt state shown, the construction site can be changed without disassembling, as in the prior art. When the guide frame 30 is tilted, the guide frame 30 is lowered with a slight inclination as shown in FIG. When the center of gravity of the guide frame 30 is aligned with the center between the pair of fixed frames 21 and the movable frame 24 of the support frame 20, the piston rod 15 a of the hydraulic cylinder 15 for tilting is extended, and horizontally above the construction machine main body 11. Defeat. Thereby, the fall of the construction machine main body 11 can be prevented.

その結果、地中連続壁造成装置10による地中連続壁9の構築場所を別の場所で行う際に、従来のように、施工機本体11からガイドフレーム30等を分解する必要はなく、施工機本体11を一対のクローラ13,13を介して新しい構築場所に走行させて搬送させることができる。このようにして、施工場所を簡単に替えることができるため、施工の移動時間を短縮することができ、効率良く、かつ、低コストで地中連続壁9を構築することができる。   As a result, it is not necessary to disassemble the guide frame 30 etc. from the construction machine main body 11 as in the prior art when performing the construction of the underground continuous wall 9 by the underground continuous wall constructing apparatus 10 in another place. The machine body 11 can be transported by traveling to a new construction place via a pair of crawlers 13 and 13. Thus, since a construction place can be changed easily, the movement time of construction can be shortened, and the underground continuous wall 9 can be constructed efficiently and at low cost.

図16は本発明の他の実施形態の地中連続壁造成装置のノズル配置部分の説明図である。   FIG. 16 is an explanatory diagram of a nozzle arrangement portion of an underground continuous wall forming apparatus according to another embodiment of the present invention.

この他の実施形態では、ガイドフレーム30の先端(下端)に設けられた開口部37内にセメントミルク等の固化液(改良材)Wを噴射させる一対のノズル55,55を横方向に往復移動自在に設けてある。   In this other embodiment, a pair of nozzles 55, 55 for injecting a solidified liquid (improvement material) W such as cement milk into the opening 37 provided at the tip (lower end) of the guide frame 30 is reciprocated in the lateral direction. It is provided freely.

即ち、この各ノズル55のノズル本体55aの上面にはピン56を突設してあり、このピン56を、取付フレーム38上の支軸52を介して基部側が揺動自在に支持される揺動リンク57の先端の長孔57a内に摺動自在に支持してある。この各揺動リンク57の基端57bには揺動用の油圧シリンダ53のピストンロッド53bの先端にピン枢支してある。この揺動用の油圧シリンダ53の基端部53aは取付フレーム38にピン枢支してある。   That is, a pin 56 protrudes from the upper surface of the nozzle body 55 a of each nozzle 55, and the pin 56 is swingably supported on the base side through the support shaft 52 on the mounting frame 38. The link 57 is slidably supported in the long hole 57a at the tip. A pin 57 is pivotally supported at the base end 57 b of each swing link 57 at the tip of the piston rod 53 b of the swing hydraulic cylinder 53. A base end portion 53 a of the swing hydraulic cylinder 53 is pivotally supported on the mounting frame 38.

そして、この各油圧シリンダ53のピストンロッド53bの伸縮動により各揺動リンク57を支軸52を中心として水平方向に揺動することにより、一対のノズル55,55がガイド58に沿って横方向に往復移動自在に設けてある。尚、各ノズル本体55aのノズル噴射口55bは開口部37に位置している。また、ノズル本体55aの後部にはセメントミルク等の固化液Wを供給するチューブ54を接続してある。   The pair of nozzles 55, 55 is moved along the guide 58 in the horizontal direction by swinging each swing link 57 in the horizontal direction around the support shaft 52 by the expansion and contraction of the piston rod 53 b of each hydraulic cylinder 53. Are provided so as to be reciprocally movable. The nozzle injection port 55b of each nozzle body 55a is located in the opening 37. A tube 54 for supplying a solidified liquid W such as cement milk is connected to the rear part of the nozzle body 55a.

この他の実施形態では、前記実施形態と同様に、エンドレスチェーン40の回転を停止させた状態でガイドフレーム30を引き抜く際に、一対のノズル50,50を横方向に往復移動させて固化液Wを噴射させることにより、図20(b)に示すように、既設の固化した地中連続壁9との継ぎ目部分に地上まで固化液Wを噴射させてラップ施工を施す。この際、図20(a)に示す従来例のように、既設の固化したソイルセメント壁体9の継ぎ目部分9aを凹状に削り込む必要がなく、既設の固化した地中連続壁9との継ぎ目部分のラップ施工を容易かつ確実に短時間で行うことができる。また、既設の固化した地中連続壁9との継ぎ目部分に地上まで固化液Wを効率良く噴射させることができるため、ラップ施工の経済性を高めることができると共に、既設の固化した地中連続壁9との継ぎ目部分の遮水性を十分に確保することができる。   In this other embodiment, as in the previous embodiment, when the guide frame 30 is pulled out while the rotation of the endless chain 40 is stopped, the pair of nozzles 50 and 50 are moved back and forth in the lateral direction to cause the solidified liquid W As shown in FIG. 20 (b), the solidified liquid W is sprayed to the ground at the joint portion between the existing solid continuous wall 9 and lapping is performed. At this time, unlike the conventional example shown in FIG. 20 (a), it is not necessary to cut the seam portion 9a of the existing solid cement wall body 9 into a concave shape, and the seam with the existing solid continuous underground wall 9 is obtained. The lap construction of the part can be performed easily and reliably in a short time. Moreover, since the solidification liquid W can be efficiently injected to the joint part with the existing solid continuous underground wall 9 to the ground, it is possible to improve the economic efficiency of the lap construction and to improve the existing solid continuous underground. It is possible to sufficiently ensure the water shielding property of the joint portion with the wall 9.

図17(a)は本発明の別の実施形態の地中連続壁造成装置のノズル配置部分の斜視図、図17(b)は本発明の別の実施形態のノズルの斜視図である。   FIG. 17 (a) is a perspective view of a nozzle arrangement portion of an underground continuous wall forming apparatus according to another embodiment of the present invention, and FIG. 17 (b) is a perspective view of a nozzle according to another embodiment of the present invention.

この別の実施形態では、ガイドフレーム30の先端(下端)に設けられた開口部37内にセメントミルク等の固化液(改良材)Wを噴射させるノズル59のノズル噴射口59aを横方向にスリット状に延びるように設けてある。この横方向にスリット状に延びるノズル59の後部59bにはセメントミルク等の固化液Wを供給するチューブ54を接続してある。   In this other embodiment, the nozzle injection port 59a of the nozzle 59 for injecting solidified liquid (improvement material) W such as cement milk into the opening 37 provided at the tip (lower end) of the guide frame 30 is slit in the lateral direction. It is provided to extend in a shape. A tube 54 for supplying a solidified liquid W such as cement milk is connected to a rear portion 59b of the nozzle 59 extending in a slit shape in the lateral direction.

そして、前記各実施形態と同様に、エンドレスチェーン40の回転を停止させた状態でガイドフレーム30を引き抜く際に、横方向にスリット状に延びて開口部37内より露出するノズル59のノズル噴射口59aから固化液Wを噴射させることで、図20(b)に示すように、既設の固化した地中連続壁9との継ぎ目部分に地上まで固化液Wを噴射させてラップ施工を施す。この際、図20(a)に示す従来例のように、既設の固化したソイルセメント壁体9の継ぎ目部分9aを凹状に削り込む必要がなく、既設の固化した地中連続壁9との継ぎ目部分のラップ施工を容易かつ確実に短時間で行うことができる。また、既設の固化した地中連続壁9との継ぎ目部分に地上まで固化液Wを効率良く噴射させることができるため、ラップ施工の経済性を高めることができると共に、既設の固化した地中連続壁9との継ぎ目部分の遮水性を十分に確保することができる。   As in the above embodiments, when the guide frame 30 is pulled out with the rotation of the endless chain 40 stopped, the nozzle injection port of the nozzle 59 that extends in a slit shape in the horizontal direction and is exposed from the opening 37 is used. By injecting the solidified liquid W from 59a, as shown in FIG. 20B, the solidified liquid W is sprayed to the ground at the joint portion between the existing solid continuous wall 9 and lapping is performed. At this time, unlike the conventional example shown in FIG. 20 (a), it is not necessary to cut the seam portion 9a of the existing solid cement wall body 9 into a concave shape, and the seam with the existing solid continuous underground wall 9 is obtained. The lap construction of the part can be performed easily and reliably in a short time. Moreover, since the solidification liquid W can be efficiently injected to the joint part with the existing solid continuous underground wall 9 to the ground, it is possible to improve the economic efficiency of the lap construction and to improve the existing solid continuous underground. It is possible to sufficiently ensure the water shielding property of the joint portion with the wall 9.

尚、前記各実施形態によれば、ガイドフレーム30を地盤7中に垂直に挿入したが、図18に示すように、地盤7中にガイドフレーム30を斜めに挿入して地中連続壁9を施工しても良い。また、前記各実施形態では、既設の固化した地中連続壁との継ぎ目部分に地上まで固化液を噴射させてラップ施工を施す際に、エンドレスチェーンの回転を停止させた状態でガイドフレームを引き抜きながら固化液を噴射させていたが、エンドレスチェーンの回転させながら固化液を噴射させても良く、また、ガイドフレームの地盤中に挿入する際に、固化液を噴射させても良い。さらに、ガイドフレームの先端(下端)に設けられた開口部に固化液を噴射させるノズルを設けたが、ガイドフレームの先端から上部にかけてノズルを複数設けても良く、さらに、改良材はセメントミルク等の固化液に限られるものでないことは勿論である。   In addition, according to each said embodiment, although the guide frame 30 was inserted vertically in the ground 7, as shown in FIG. 18, the guide frame 30 is inserted diagonally in the ground 7, and the underground continuous wall 9 is made into You may construct. In each of the above embodiments, the guide frame is pulled out in a state in which the rotation of the endless chain is stopped when the solidified liquid is sprayed to the ground at the joint portion with the existing solid continuous wall and the lap construction is performed. However, the solidified liquid may be ejected while rotating the endless chain, or the solidified liquid may be ejected when inserted into the ground of the guide frame. Furthermore, although the nozzle for injecting the solidified liquid is provided in the opening provided at the tip (lower end) of the guide frame, a plurality of nozzles may be provided from the tip of the guide frame to the upper part. Of course, it is not limited to the solidified liquid.

本発明の実施形態の地中連続壁造成装置を示す側面図である。It is a side view which shows the underground continuous wall construction apparatus of embodiment of this invention. 上記地中連続壁造成装置の平面図である。It is a top view of the above-mentioned underground continuous wall construction device. 上記地中連続壁造成装置に用いられるガイドフレームと支持フレームの斜視図である。It is a perspective view of the guide frame and support frame which are used for the above-mentioned underground continuous wall construction device. 上記支持フレームの移動枠の断面図である。It is sectional drawing of the moving frame of the said support frame. 上記支持フレームの固定枠の断面図である。It is sectional drawing of the fixed frame of the said support frame. 上記支持フレームの下降前の状態を示す側面図である。It is a side view which shows the state before the said support frame descend | falls. 上記支持フレームの移動枠を1ピッチ上昇させた状態を示す側面図である。It is a side view which shows the state which raised the moving frame of the said support frame 1 pitch. 上記支持フレームの移動枠をロックして固定枠を1ピッチ上昇させた状態を示す側面図である。It is a side view which shows the state which locked the moving frame of the said support frame and raised the fixed frame 1 pitch. 上記支持フレームの固定枠をロックして移動枠を1ピッチ上昇させた状態を示す側面図である。It is a side view which shows the state which locked the fixed frame of the said support frame and raised the moving frame 1 pitch. 上記地中連続壁造成装置のノズル配置部分の説明図である。It is explanatory drawing of the nozzle arrangement | positioning part of the said underground continuous wall construction apparatus. 上記ガイドフレームに回転自在に支持される環状のエンドレスチェーンに取り付けられた掘削ビットの斜視図である。It is a perspective view of the excavation bit attached to the cyclic | annular endless chain rotatably supported by the said guide frame. 上記環状のエンドレスチェーンに取り付けられた他の掘削ビットの斜視図である。It is a perspective view of the other excavation bit attached to the said annular endless chain. 上記ガイドフレームを地上に起立させた状態を示す側面図である。It is a side view which shows the state which raised the said guide frame on the ground. 上記ガイドフレームの傾倒途中の状態を示す側面図である。It is a side view which shows the state in the middle of inclination of the said guide frame. 上記ガイドフレームを水平に傾倒させた状態を示す側面図である。It is a side view which shows the state which inclined the said guide frame horizontally. 本発明の他の実施形態の地中連続壁造成装置のノズル配置部分の説明図である。It is explanatory drawing of the nozzle arrangement | positioning part of the underground continuous wall construction apparatus of other embodiment of this invention. (a)は本発明の別の実施形態の地中連続壁造成装置のノズル配置部分の斜視図、(b)は本発明の別の実施形態のノズルの斜視図である。(A) is a perspective view of the nozzle arrangement | positioning part of the underground continuous wall construction apparatus of another embodiment of this invention, (b) is a perspective view of the nozzle of another embodiment of this invention. 上記地中連続壁造成装置により斜めに地盤改良をする状態を示す側面図である。It is a side view which shows the state which improves the ground diagonally with the said underground continuous wall construction apparatus. (a)〜(c)は従来の地中連続壁造成装置による地盤改良工程を示す説明図である。(A)-(c) is explanatory drawing which shows the ground improvement process by the conventional underground continuous wall construction apparatus. (a)は従来の地中連続壁造成装置による地中連続壁の継ぎ目部分の説明図、(b)は本発明による地中連続壁の継ぎ目部分の説明図である。(A) is explanatory drawing of the joint part of the underground continuous wall by the conventional underground continuous wall construction apparatus, (b) is explanatory drawing of the joint part of the underground continuous wall by this invention.

符号の説明Explanation of symbols

10 地中連続壁造成装置(地盤改良装置)
11 施工機本体(走行車両)
20 支持フレーム
30 ガイドフレーム
40 エンドレスチェーン(無限端移動体)
41,42 掘削ビット(掘削突起)
50,55,59 ノズル
7 地盤
8 原位置土
9 ソイルセメント壁(地中連続壁)
W 固化液(改良材)
M 溝
10 Underground continuous wall construction equipment (ground improvement equipment)
11 Construction machine body (traveling vehicle)
20 Support frame 30 Guide frame 40 Endless chain (infinite end moving body)
41, 42 Drilling bit (drilling protrusion)
50, 55, 59 Nozzle 7 Ground 8 Soil 9 Soil cement wall (underground continuous wall)
W Solidified liquid (improved material)
M groove

Claims (4)

複数の掘削突起を取り付けた縦型で環状の無限端移動体と、この環状の無限端移動体を回転自在に設けると共に、上下方向に延びたガイドフレームと、このガイドフレームに設けられ、改良材を噴射させるノズルと、前記ガイドフレームを昇降動自在に支持した支持フレームと、この支持フレームを取り付けた走行車両とを備え、
前記ガイドフレームを下降させて地盤中に前記無限端移動体を挿入した後で、前記走行車両を走行させると共に前記無限端移動体を回転させ、この回転する無限端移動体の複数の掘削突起を介して溝の掘削及び前記ノズルから噴射される改良材と前記地盤の原位置土との混合攪拌を行って前記地盤中に改良体を造成するようにした地盤改良装置において、
前記ガイドフレームを昇降動自在に支持した前記支持フレームを前記走行車両に対して起立状態から水平の傾倒状態に移動自在に設けたことを特徴とする地盤改良装置。
A vertical annular endless moving body with a plurality of excavation protrusions, the annular infinite end moving body provided rotatably, and a guide frame extending in the vertical direction, and provided on the guide frame. A nozzle that injects the guide frame, a support frame that supports the guide frame so as to be movable up and down, and a traveling vehicle to which the support frame is attached.
After the guide frame is lowered and the infinite end moving body is inserted into the ground, the traveling vehicle is driven and the infinite end moving body is rotated, and a plurality of excavation protrusions of the rotating endless end moving body are provided. In the ground improvement device in which the improved body is created in the ground by performing mixing excavation of the improved material sprayed from the nozzle and the original soil of the ground through excavation of the groove through
A ground improvement device, wherein the support frame supporting the guide frame so as to be movable up and down is provided so as to be movable from a standing state to a horizontal tilted state with respect to the traveling vehicle.
請求項1記載の地盤改良装置であって、
前記ガイドフレームに前記ノズルを揺動自在に設けたことを特徴とする地盤改良装置。
The ground improvement device according to claim 1,
A ground improvement device, wherein the nozzle is swingably provided on the guide frame.
請求項1記載の地盤改良装置であって、
前記ガイドフレームに前記ノズルを横方向に往復移動自在に設けたことを特徴とする地盤改良装置。
The ground improvement device according to claim 1,
A ground improvement device, wherein the guide frame is provided with the nozzle so as to be reciprocally movable in a lateral direction.
請求項1記載の地盤改良装置であって、
前記ガイドフレームに前記ノズルを横方向にスリット状に設けたことを特徴とする地盤改良装置。
The ground improvement device according to claim 1,
A ground improvement device in which the nozzle is provided in the guide frame in a slit shape in the lateral direction.
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