CONSTRUCTION METHOD OF SOIL CEMENT CONTINUOUS WALL

To lengthen an excavation depth and an inserted core material length since a hole wall clearance can be increased by making a following pile diameter smaller than a preceding pile diameter as a countermeasure against lack of room for a hole wall clearance due to the same diameter of a preceding pile as that of a following pile, in a construction method of soil cement continuous walls.SOLUTION: An excavation diameter of a columnar body of a following pile is smaller than an excavation diameter of a columnar body of a preceding pile. A core material made of an H-shaped steel to be inserted into the columnar body of the following pile has the same shape as an H-shaped steel to be inserted into the columnar body of the preceding pile. A distance between a flange end of a core material made of the H-shaped steel to be inserted into the columnar body of the preceding pile and an outer peripheral edge of the excavation diameter of the columnar body of the following pile can be secured long also along a depth of the core material to be inserted.SELECTED DRAWING: Figure 1 【課題】ソイルセメント連続壁の施工法において、先行・後行が同径により孔壁クリアランスに余裕がないための対策として、後行杭径を先行杭径より小さくすることで孔壁クリアランスを大きく取れるため、削孔深度および挿入芯材長が長くすることができる。【解決手段】後行杭の柱状体の掘削径は先行杭の柱状体の掘削径よりも小径とし、後行杭の柱状体に挿入するＨ形鋼による芯材は先行杭の柱状体に挿入するＨ形鋼と同形であり、先行杭の柱状体に挿入するＨ形鋼による芯材のフランジ端と後行杭の柱状体の掘削径の外周縁との距離を挿入する芯材の深さに沿っても大きく確保できるようにした。【選択図】図１