JP2005068919A - Earth retaining wall structure using rotary press-in steel pipe pile and its construction method - Google Patents

Earth retaining wall structure using rotary press-in steel pipe pile and its construction method Download PDF

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JP2005068919A
JP2005068919A JP2003303185A JP2003303185A JP2005068919A JP 2005068919 A JP2005068919 A JP 2005068919A JP 2003303185 A JP2003303185 A JP 2003303185A JP 2003303185 A JP2003303185 A JP 2003303185A JP 2005068919 A JP2005068919 A JP 2005068919A
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pile
steel pipe
rotary press
group
pipe piles
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Hidetaka Nishimoto
英高 西本
Akihiko Nishimura
昭彦 西村
Akira Komatsu
章 小松
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JR SOKEN ENGINEERING KK
Nippon Steel Corp
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JR SOKEN ENGINEERING KK
Nippon Steel Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an earth retaining wall structure having a large bearing power and its construction method which excel in workability in a non-earth-removal construction and a row-type construction using rotary press-in piles. <P>SOLUTION: The earth retaining wall structure using the rotary press-in steel pipe piles comprises a first group pile row, a second group pile row and cut-off walls. The first group pile row includes a plurality of the rotary press-in steel pipe piles having excavating blades at their lower ends, the outer diameters of which blades are larger than those of the pipe piles. The pipe piles of the first group pile row are positioned at a predetermined depth at intervals which are determined so that the excavating blades may not interfere with one another. The second group pile row includes a plurality of the rotary press-in steel pipe piles having the excavating blades at their lower ends, the outer diameter of which blades are larger than those of the pipe piles. The pipe piles of the second group pile row are positioned at the intervals between the pipe piles of the first group pile row, and the excavating blades of the piles of the second group pile row are positioned at the heights slightly upper than the heights of the blades of the pipe piles of the first group pile row. The cut-off walls prepared by means of soil improvement are positioned at the intervals between the pipe piles constituting the first and second group pile rows. The first and second group pile rows are aligned on a straight line or on a curved line. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、下端に杭外径より大きな掘削羽根を備えた回転圧入鋼管杭を複数地中に打設して構築される土留壁構造とその施工方法に関する。
The present invention relates to a retaining wall structure constructed by driving a rotary press-fit steel pipe pile having a drilling blade larger than the outer diameter of the pile at the lower end into a plurality of grounds, and a construction method thereof.

特開平９−７８５６９号公報には、鋼管矢板による土留壁構造として、継手部を外周に備えた鋼管矢板を、中堀オーガーにより地中に圧入し、隣り合う鋼管矢板の継手部を係合し、継手部に止水用充填材を充填して土留壁を構築する土留壁の構築方法が開示されている。
また、特開２０００−１３６５３２号公報には、下端に杭径より大きい掘削羽根を備える回転圧入鋼管杭を地中に回転圧入する際、回転圧入鋼管杭の外周に回転自在に嵌挿した鞘管矢板を同時に地中に圧入し、回転圧入鋼管杭の下端の掘削羽根が干渉しない間隔で回転圧入鋼管杭を地中に打設し、回転圧入鋼管杭間の間隙を鞘管矢板の端部継手部を係合するようにした土留壁構造が開示されている。
特開平９−７８５６９号公報 特開２０００−１３６５３２号公報 In JP-A-9-78569, as a retaining wall structure with a steel pipe sheet pile, a steel pipe sheet pile having a joint portion on the outer periphery is press-fitted into the ground by a Nakabori auger, and a joint portion of adjacent steel pipe sheet piles is engaged. A construction method of a retaining wall is disclosed in which a retaining wall is constructed by filling a joint portion with a water-stopping filler.
Japanese Patent Laid-Open No. 2000-136532 discloses a sheath tube that is rotatably fitted to the outer periphery of a rotary press-fit steel pipe pile when rotary press-fit steel pipe pile having a drilling blade larger than the pile diameter at the lower end is press-fitted into the ground. Simultaneously press the sheet pile into the ground, place the rotary press-fit steel pipe pile into the ground at an interval where the drilling blades at the lower end of the rotary press-fit steel pipe pile do not interfere, and connect the gap between the rotary press-fit steel pipe piles to the end joint of the sheath pipe sheet pile A retaining wall structure is disclosed in which the portions are engaged.
Japanese Patent Laid-Open No. 9-78569 JP 2000-136532 A

しかし、特開平９−７８５６９号公報に開示されたものは、中堀りオーガーによる掘削土の運搬、処理の問題や、継手部への止水充填材の充填のための作業を必要とし、施工コストが高価になるという問題を有する。
特開２０００−１３６５３２号公報に開示されたものは、下端に杭外径より大きい掘削羽根を備えた回転圧入鋼管杭を用いるため掘削土は発生しないが、掘削羽根の干渉を防ぐため、鋼管杭間は鞘管矢板により止水する構造のため、鞘管矢板と回転圧入鋼管杭の同時圧入施工は非常に困難である。また、鞘管矢板部分の材料費も別途となり、結局施工コストが高価になるという問題を有する。 However, what is disclosed in Japanese Patent Application Laid-Open No. 9-78569 requires a problem of transporting and treating excavated soil by a mid-digger auger and a work for filling a joint with a water-stopping filler, and the construction cost Has the problem of becoming expensive.
Japanese Patent Laid-Open No. 2000-136532 uses a rotary press-fit steel pipe pile having a drilling blade larger than the outer diameter of the pile at the lower end, so that no excavation soil is generated, but in order to prevent the interference of the drilling blade, Due to the structure where the water is stopped by the sheath pipe sheet pile, it is very difficult to simultaneously press the sheath pipe sheet pile and the rotary press-fit steel pipe pile. In addition, the material cost of the sheath pipe sheet pile portion is also separate, and there is a problem that the construction cost becomes high after all.

本発明は、前記従来技術の持つ問題点を解決する、回転圧入杭による無排土施工及び列状施工性が良く、支持力の大きい土留壁構造とその施工方法を提供することを目的とする。   An object of the present invention is to provide a soil retaining wall structure and a construction method thereof that solves the problems of the prior art, has good soil-free construction and row-like construction by rotating press-fit piles, and has a large supporting force. .

本第１発明は、前記課題を解決するために、回転圧入鋼管杭による土留壁構造において、杭外径より大きい杭下端の掘削羽根が干渉しない間隔で地中の所定深さに位置する複数の回転圧入鋼管杭からなる杭列と、前記杭列を構成する回転圧入鋼管杭間の間隙部の掘削羽根上部から上方向に延びる地盤改良による止水壁とにより構成され、前記杭列が直線上又は曲線上に整列することを特徴とする。   In order to solve the above-mentioned problem, the first invention of the present invention is a retaining wall structure using a rotary press-fit steel pipe pile, and a plurality of pieces located at a predetermined depth in the ground at intervals where the excavation blades at the lower end of the pile larger than the outer diameter of the pile do not interfere. It consists of a pile of rotary press-fit steel pipe piles and a water stop wall by ground improvement extending upward from the upper part of the excavation blades in the gap between the rotary press-fit steel pipe piles constituting the pile row, and the pile row is linear Or it arranges on a curve, It is characterized by the above-mentioned.

本第２発明は、回転圧入鋼管杭による土留壁構造において、杭外径より大きい杭下端の掘削羽根が干渉しない間隔で地中の所定深さに位置する複数の回転圧入鋼管杭からなる第１群の杭列と、前記第１群の杭列を構成する複数の回転圧入鋼管杭間の間隙部に位置し、杭外径より大きい杭下端の掘削羽根が前記第１群の杭列を構成する回転圧入鋼管杭の掘削羽根の若干上に位置する複数の回転圧入鋼管杭からなる第２群の杭列と、前記第１群及び第２群の杭列を構成する回転圧入鋼管杭間の間隙部に位置する地盤改良による止水壁とにより構成され、前記第１群及び第２群の杭列が直線上又は曲線上に整列することを特徴とする。   The second aspect of the present invention is a first retaining wall structure comprising a plurality of rotary press-fit steel pipe piles positioned at a predetermined depth in the ground at intervals where the excavation blades at the lower end of the pile larger than the outer diameter of the pile do not interfere with each other. The pile piles of the group and the excavation blades at the lower end of the pile larger than the outer diameter of the piles are located in the gaps between the plurality of rotary press-fit steel pipe piles constituting the pile group of the first group and constitute the pile group of the first group Between the second group of piles made of a plurality of rotary press-fit steel pipe piles located slightly above the excavation blades of the rotary press-fit steel pipe piles, and the rotary press-fit steel pipe piles constituting the first group and the second group of pile rows It is comprised by the water stop wall by the ground improvement located in a clearance gap, The pile row | line | column of the said 1st group and the 2nd group aligns on a straight line or a curve, It is characterized by the above-mentioned.

本第３発明は、回転圧入鋼管杭による土留壁の施工方法において、下端に杭外径より大きい掘削羽根を有する複数の回転圧入鋼管杭を、下端の掘削羽根が干渉しない間隔で地中の所定深さに回転圧入して杭列を構築とした後、前記杭列を構成する回転圧入鋼管杭間の間隙部に地盤改良による止水壁を構築することを特徴とする。   The third invention relates to a method for constructing a retaining wall using a rotary press-fit steel pipe pile, wherein a plurality of rotary press-fit steel pipe piles having a drilling blade larger than the outer diameter of the pile at the lower end are arranged at predetermined intervals in the ground at intervals at which the lower drilling blade does not interfere. It is characterized by constructing a water stop wall by ground improvement in the gap between the rotary press-fit steel pipe piles constituting the pile row after constructing the pile row by rotary press-fitting to a depth.

本第４発明は、回転圧入鋼管杭による土留壁の施工方法において、下端に杭外径より大きい掘削羽根を有する複数の回転圧入鋼管杭を、下端の掘削羽根が干渉しない間隔で地中の所定深さに回転圧入して第１群の杭列を構築とした後、前記第１群の杭列を構成する回転圧入鋼管杭間の間隙部に、下端に杭外径より大きい掘削羽根を有する複数の回転圧入鋼管杭を、その下端の掘削羽根が前記第１群の杭列の回転圧入鋼管杭の下端の掘削羽根の若干上に位置するように回転圧入し、前記第１群及び第２群の杭列が直線上又は曲線上に整列するようにし、その後、第１群及び第２群の杭列を構成する回転圧入鋼管杭間の間隙部に地盤改良による止水壁を構築することを特徴とする回転圧入鋼管杭による土留壁の施工方法。
The fourth aspect of the present invention is a method for constructing a retaining wall using a rotary press-fit steel pipe pile, wherein a plurality of rotary press-fit steel pipe piles having drilling blades larger than the outer diameter of the pile at the lower end are arranged at predetermined intervals in the ground at intervals at which the lower end drilling blades do not interfere with each other. After constructing the first group of piles by rotary press-fitting to the depth, the lower end has excavation blades larger than the outer diameter of the piles in the gap between the rotary press-fit steel pipe piles constituting the first group of piles Rotating and press-fitting a plurality of rotary press-fit steel pipe piles so that the lower excavation blades are located slightly above the lower excavation blades of the rotary press-fit steel pipe piles of the first group of pile rows. The pile rows of the group are aligned on a straight line or a curved line, and then a water barrier wall by ground improvement is constructed in the gap between the rotary press-fit steel pipe piles constituting the pile rows of the first group and the second group. A method for constructing retaining walls using rotary press-fit steel pipe piles.

本発明の回転圧入鋼管杭による土留壁構造は、直線上又は曲線上に整列して配置されるので、土留壁の厚みを薄くすることができ、回転圧入鋼管杭の下端に杭径より大きい掘削羽根を備えているので、圧縮荷重及び引抜き荷重に対しても抵抗力が大きい土留壁構造とすることができる。
また、本発明の回転圧入鋼管杭には継手部が存在しないので、施工性が良い。
さらに、本発明の回転圧入鋼管杭は排土が発生せず、全旋回型回転圧入機による施工であるので、騒音、振動の発生を低減でき、少ない用地又は、狭い用地での施工が可能であるので、仮設コスト及び施工コストの低減化を図ることができる。
Since the retaining wall structure by the rotary press-fit steel pipe pile of the present invention is arranged in a straight line or on a curve, the thickness of the stay wall can be reduced, and the lower end of the rotary press-fit steel pipe pile is excavated larger than the pile diameter. Since the blades are provided, it is possible to provide a retaining wall structure that has a high resistance against compressive loads and pull-out loads.
Moreover, since there is no joint part in the rotary press-fit steel pipe pile of this invention, workability | operativity is good.
Furthermore, since the rotary press-fit steel pipe pile of the present invention does not generate soil and is constructed by a full-slewing rotary press-fitting machine, it can reduce the generation of noise and vibration, and can be constructed on a small or narrow site. Therefore, the temporary cost and the construction cost can be reduced.

本発明の実施例１を図により説明する。   Embodiment 1 of the present invention will be described with reference to the drawings.

図１は、本発明の土留壁構造の一実施形態を示す斜視図であり、第２図は、その側面図である。
土留壁１は、下端に杭径より大きい掘削羽根１０を有する回転圧入鋼管杭９が、その下端の掘削羽根１０同士が干渉しない間隔で地中の所定深さに位置する複数の回転圧入鋼管杭９からなる杭列１１を有する。
土留壁１は、杭列１１を構成する回転圧入鋼管杭９、９間の間隙部に位置する地盤改良により形成される止水壁１２を有する。
止水壁１２の下端は、杭列１１を構成する回転圧入鋼管杭９の下端の掘削羽根１０の上に位置する。
杭列１１は、直線上または曲線上に整列している。 FIG. 1 is a perspective view showing an embodiment of the earth retaining wall structure of the present invention, and FIG. 2 is a side view thereof.
The retaining wall 1 has a plurality of rotary press-fit steel pipe piles in which a rotary press-fit steel pipe pile 9 having excavation blades 10 larger than the pile diameter at the lower end is positioned at a predetermined depth in the ground at intervals at which the lower excavation blades 10 do not interfere with each other. It has a pile row 11 consisting of nine.
The earth retaining wall 1 has a water stop wall 12 formed by ground improvement located in a gap between the rotary press-fit steel pipe piles 9 and 9 constituting the pile row 11.
The lower end of the water blocking wall 12 is located on the excavation blade 10 at the lower end of the rotary press-fit steel pipe pile 9 constituting the pile row 11.
The pile row 11 is aligned on a straight line or a curved line.

本発明の実施例２を図により説明する。
図３は、本発明の土留壁構造の一実施形態を示す斜視図であり、第４図は、その側面図である。
土留壁１は、下端に杭径より大きい掘削羽根３を有する回転圧入鋼管杭２が、その下端の掘削羽根３同士が干渉しない間隔で地中の所定深さに位置する複数の回転圧入鋼管杭２からなる第１群の杭列４を有する。
また、土留壁１は、第１群の杭列４を構成する回転圧入鋼管杭２間の間隙部に位置し、下端に杭径より大きい掘削羽根６を有する回転圧入鋼管杭５が、その下端の掘削羽根６が、第１群の杭列４を構成する回転圧入鋼管杭２の下端の掘削羽根３より若干上に位置する第２群の杭列７を有する。
さらに、土留壁１は、第１及び第２群の杭列４、７を構成する回転圧入鋼管杭２，５の間隙部に位置する地盤改良により形成される止水壁８を有する。
止水壁８の下端は、第２群の杭列７を構成する回転圧入鋼管杭５の下端の掘削羽根６の上に位置する。 A second embodiment of the present invention will be described with reference to the drawings.
FIG. 3 is a perspective view showing an embodiment of the earth retaining wall structure of the present invention, and FIG. 4 is a side view thereof.
The retaining wall 1 has a plurality of rotary press-fit steel pipe piles in which a rotary press-fit steel pipe pile 2 having excavation blades 3 larger than the pile diameter at the lower end is positioned at a predetermined depth in the ground at intervals at which the lower excavation blades 3 do not interfere with each other. A pile group 4 of the first group consisting of two.
In addition, the retaining wall 1 is located in the gap between the rotary press-fit steel pipe piles 2 constituting the first group of pile rows 4, and the rotary press-fit steel pipe pile 5 having a drilling blade 6 larger than the pile diameter at the lower end is provided at the lower end. The second excavation blade 6 has a second group of pile rows 7 located slightly above the excavation blade 3 at the lower end of the rotary press-fit steel pipe pile 2 constituting the first group of pile rows 4.
Furthermore, the earth retaining wall 1 has a water blocking wall 8 formed by ground improvement located in a gap portion of the rotary press-fit steel pipe piles 2 and 5 constituting the first and second group of pile rows 4 and 7.
The lower end of the water blocking wall 8 is located on the excavation blade 6 at the lower end of the rotary press-fit steel pipe pile 5 constituting the second group of pile rows 7.

第１群及び第２群の杭列４、５は、直線上又は曲線上に位置するように整列して配置される。
下端に杭径より大きい掘削羽根３、６を有する回転圧入鋼管杭２、５により第１群及び第２群の杭列４、７を直線上又は曲線上に位置するように整列して配置されるため、土留壁１の厚みを薄くすることができ、継手部を必要としないので支持力の大きいな土留壁１とすることができる。 The pile groups 4 and 5 of the first group and the second group are arranged so as to be positioned on a straight line or a curved line.
The piles 4 and 7 of the first group and the second group are arranged so as to be positioned on a straight line or a curve by rotary press-fit steel pipe piles 2 and 5 having excavation blades 3 and 6 larger than the pile diameter at the lower end. Therefore, the thickness of the retaining wall 1 can be reduced, and since no joint portion is required, the retaining wall 1 having a large supporting force can be obtained.

図５（ａ）（ｂ）（ｃ）（ｄ）は、本発明の実施例１の土留壁の構築の施工順序を示す平面図である。
（１）図５（ａ）（ｂ）に示すように、下端に杭径より大きい掘削羽根１０を備えた回転圧入鋼管杭９を、その下端の掘削羽根１０が干渉しない間隔で、全旋回型回転圧入機等により、地中の所定深さに回転圧入して杭列１１を施工する。
（２）次に、図５（ｃ）（ｄ）に示すように、杭列１１を構成する回転圧入鋼管杭９、９間の間隙部に固化剤注入しながら周囲地盤と攪拌混合固化させる地盤改良工法等により止水壁１２を形成し土留壁１を構築する。 FIGS. 5A, 5B, 5C, and 5D are plan views showing the construction sequence of construction of the retaining wall according to the first embodiment of the present invention.
(1) As shown in FIGS. 5 (a) and 5 (b), a rotary press-fit steel pipe pile 9 having a drilling blade 10 larger than the pile diameter at the lower end is fully swirled at intervals at which the lower drilling blade 10 does not interfere. The pile row 11 is constructed by rotary press-fitting to a predetermined depth in the ground using a rotary press-fitting machine or the like.
(2) Next, as shown in FIGS. 5 (c) and 5 (d), the ground is stirred and mixed and solidified while injecting a solidifying agent into the gap between the rotary press-fit steel pipe piles 9, 9 constituting the pile row 11. The retaining wall 12 is formed by an improved construction method or the like, and the retaining wall 1 is constructed.

図６（ａ）（ｂ）（ｃ）（ｄ）（ｅ）（ｆ）は、本発明の実施例２の土留壁１の構築の施工順序を示す平面図である。
（１）図６（ａ）（ｂ）に示すように、下端に杭径より大きい掘削羽根３を備えた回転圧入鋼管杭２を、その下端の掘削羽根３が干渉しない間隔で、全旋回型回転圧入機等により、地中の所定深さに回転圧入して第１群の杭列４を施工する。
（２）次に、図６（ｃ）（ｄ）に示すように、下端に杭径より大きい掘削羽根６を備えた回転圧入鋼管杭５を、その下端の掘削羽根６が、第１群の杭列４を構成する回転圧入鋼管杭２の下端の掘削羽根３より若干上に位置するように、全旋回型回転圧入機等により、地中の所定深さに回転圧入して第２群の杭列７を施工する。
第１群及び第２群の杭列４、７は、直線上又は曲線上に整列するように配置する。
（３）続いて、図６（ｅ）（ｆ）に示すように、第１群及び第２群の杭列４、７を構成する回転圧入鋼管杭２、５間の間隙部に固化剤注入しながら周囲地盤と攪拌混合固化させる地盤改良工法等により止水壁８を形成し土留壁１を構築する。
6 (a) (b) (c) (d) (e) (f) are plan views showing the construction sequence of construction of the retaining wall 1 of Example 2 of the present invention.
(1) As shown in FIGS. 6 (a) and 6 (b), a rotary press-fit steel pipe pile 2 having a drilling blade 3 larger than the pile diameter at the lower end is fully swirled at intervals at which the lower drilling blade 3 does not interfere. Using a rotary press machine or the like, the first group of pile rows 4 is constructed by rotary press-fitting to a predetermined depth in the ground.
(2) Next, as shown in FIGS. 6 (c) and 6 (d), the rotary press-fit steel pipe pile 5 having the drilling blade 6 larger than the pile diameter at the lower end is connected to the first group. A rotary swivel-type rotary press-fitting machine or the like is used to rotationally press-fit to a predetermined depth in the ground so that it is positioned slightly above the excavation blade 3 at the lower end of the rotary press-fit steel pipe pile 2 constituting the pile row 4. Pile row 7 is constructed.
The pile groups 4 and 7 of the first group and the second group are arranged so as to be aligned on a straight line or a curved line.
(3) Subsequently, as shown in FIGS. 6 (e) and 6 (f), a solidifying agent is injected into the gap between the rotary press-fit steel pipe piles 2 and 5 constituting the pile groups 4 and 7 of the first group and the second group. Then, the water retaining wall 8 is formed by the ground improvement method for stirring and mixing with the surrounding ground, and the earth retaining wall 1 is constructed.

本発明の実施形態を示す図である。It is a figure which shows embodiment of this invention. 本発明の実施形態を示す図であるIt is a figure which shows embodiment of this invention 本発明の実施形態を示す図である。It is a figure which shows embodiment of this invention. 本発明の実施形態を示す図である。It is a figure which shows embodiment of this invention. （ａ）〜（ｄ）本発明の実施形態を示す図である。(A)-(d) It is a figure which shows embodiment of this invention. （ａ）〜（ｆ）本発明の実施形態を示す図である。(A)-(f) It is a figure which shows embodiment of this invention.

符号の説明Explanation of symbols

１：土留壁
２：回転圧入鋼管杭
３：掘削羽根
４：第１群の杭列
５：回転圧入鋼管杭
６：掘削羽根
７：第２群の杭列
８：止水壁
９：回転圧入鋼管杭
１０：掘削羽根
１１：杭列
１２：止水壁 1: Retaining wall 2: Rotating press-fit steel pipe pile 3: Excavation blade 4: First group pile row 5: Rotation press-fit steel pipe pile 6: Excavation blade 7: Second group pile row 8: Retaining wall 9: Rotation press-fit steel pipe Pile 10: Excavation blade 11: Pile row 12: Water blocking wall

Claims (4)

杭外径より大きい杭下端の掘削羽根が干渉しない間隔で地中の所定深さに位置する複数の回転圧入鋼管杭からなる杭列と、前記杭列を構成する回転圧入鋼管杭間の間隙部に位置する地盤改良による止水壁とにより構成され、前記杭列が直線上又は曲線上に整列することを特徴とする回転圧入鋼管杭による土留壁構造。   A gap between the piles of a plurality of rotary press-fit steel pipe piles located at a predetermined depth in the ground at intervals at which the excavation blades at the lower end of the pile larger than the outer diameter of the pile do not interfere with each other and the rotary press-fit steel pipe piles constituting the pile row The earth retaining wall structure by a rotary press-fit steel pipe pile, wherein the pile row is arranged on a straight line or a curved line. 杭外径より大きい杭下端の掘削羽根が干渉しない間隔で地中の所定深さに位置する複数の回転圧入鋼管杭からなる第１群の杭列と、前記第１群の杭列を構成する複数の回転圧入鋼管杭間の間隙部に位置し、杭外径より大きい杭下端の掘削羽根が前記第１群の杭列を構成する回転圧入鋼管杭の掘削羽根の若干上に位置する複数の回転圧入鋼管杭からなる第２群の杭列と、前記第１群及び第２群の杭列を構成する回転圧入鋼管杭間の間隙部に位置する地盤改良による止水壁とにより構成され、前記第１群及び第２群の杭列が直線上又は曲線上に整列することを特徴とする回転圧入鋼管杭による土留壁構造。   A first group of pile rows composed of a plurality of rotary press-fit steel pipe piles located at a predetermined depth in the ground at intervals at which the excavation blades at the lower end of the pile larger than the outer diameter of the pile do not interfere constitute the first group of pile rows. A plurality of excavation blades at the lower end of the pile larger than the outer diameter of the pile are located slightly above the excavation blades of the rotary press-fit steel pipe piles that constitute the first group of pile rows. It is composed of a second group of piles composed of rotary press-fit steel pipe piles, and a water stop wall due to ground improvement located in the gap between the rotary press-fit steel pipe piles constituting the first group and the second group of pile rows, The retaining wall structure by rotary press-fit steel pipe piles, wherein the pile groups of the first group and the second group are aligned on a straight line or a curved line. 下端に杭外径より大きい掘削羽根を有する複数の回転圧入鋼管杭を、下端の掘削羽根が干渉しない間隔で地中の所定深さに回転圧入して杭列を構築とした後、前記杭列を構成する回転圧入鋼管杭間の間隙部に地盤改良による止水壁を構築することを特徴とする回転圧入鋼管杭による土留壁の施工方法。   After a plurality of rotary press-fit steel pipe piles having excavation blades larger than the outer diameter of the pile at the lower end are rotationally press-fitted to a predetermined depth in the ground at intervals at which the lower excavation blades do not interfere with each other, the pile row is constructed. Construction method of earth retaining wall by rotary press-fit steel pipe pile, characterized by constructing a water stop wall by ground improvement in the gap between rotary press-fit steel pipe piles constituting 下端に杭外径より大きい掘削羽根を有する複数の回転圧入鋼管杭を、下端の掘削羽根が干渉しない間隔で地中の所定深さに回転圧入して第１群の杭列を構築とした後、前記第１群の杭列を構成する回転圧入鋼管杭間の間隙部に、下端に杭外径より大きい掘削羽根を有する複数の回転圧入鋼管杭を、その下端の掘削羽根が前記第１群の杭列の回転圧入鋼管杭の下端の掘削羽根の若干上に位置するように回転圧入し、前記第１群及び第２群の杭列が直線上又は曲線上に整列するようにし、その後、第１群及び第２群の杭列を構成する回転圧入鋼管杭間の間隙部に地盤改良による止水壁を構築することを特徴とする回転圧入鋼管杭による土留壁の施工方法。   After a plurality of rotary press-fit steel pipe piles having drilling blades larger than the outer diameter of the pile at the lower end are rotationally press-fitted to a predetermined depth in the ground at intervals that do not interfere with the lower end drilling blades, , A plurality of rotary press-fit steel pipe piles having a drilling blade larger than the outer diameter of the pile at the lower end in the gap between the rotary press-fit steel pipe piles constituting the first group of pile rows, Rotating and press-fitting so that the bottom of the rotary press-fit steel pipe pile of the pile row is located slightly above the excavation blade, and the pile rows of the first group and the second group are aligned on a straight line or a curve, A method for constructing a retaining wall with a rotary press-fit steel pipe pile, characterized in that a water stop wall is constructed by ground improvement in a gap between the rotary press-fit steel pipe piles constituting the first and second group of pile rows.
JP2003303185A 2003-08-27 2003-08-27 Earth retaining wall structure using rotary press-in steel pipe pile and its construction method Pending JP2005068919A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101067707B1 (en) * 2009-10-20 2011-09-28 이복우 The earth retaining wall and waterproof construction technique for which cast in place concrete pile and grouting column was used
CN103290848A (en) * 2013-06-20 2013-09-11 江苏城市职业学院 Large diameter arc-shaped steel sheet pile combined foundation pit retaining structure and construction method thereof
JP2015124478A (en) * 2013-12-25 2015-07-06 鹿島建設株式会社 Construction method of earth retaining wall
CN115434331A (en) * 2022-09-24 2022-12-06 中铁广州工程局集团第三工程有限公司 Bridge foundation pit steel pipe pile support and double-liquid grouting curtain water stop construction method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101067707B1 (en) * 2009-10-20 2011-09-28 이복우 The earth retaining wall and waterproof construction technique for which cast in place concrete pile and grouting column was used
CN103290848A (en) * 2013-06-20 2013-09-11 江苏城市职业学院 Large diameter arc-shaped steel sheet pile combined foundation pit retaining structure and construction method thereof
CN103290848B (en) * 2013-06-20 2015-04-08 江苏城市职业学院 Large diameter arc-shaped steel sheet pile combined foundation pit retaining structure and construction method thereof
JP2015124478A (en) * 2013-12-25 2015-07-06 鹿島建設株式会社 Construction method of earth retaining wall
CN115434331A (en) * 2022-09-24 2022-12-06 中铁广州工程局集团第三工程有限公司 Bridge foundation pit steel pipe pile support and double-liquid grouting curtain water stop construction method
CN115434331B (en) * 2022-09-24 2024-04-05 中铁广州工程局集团第三工程有限公司 Bridge foundation pit steel pipe pile support and double-liquid grouting curtain water stop construction method

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