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METHOD FOR INJECTING SOLIDIFICATION AGENT INTO EXCAVATION HOLE, AND EXCAVATION ROD
To make it possible to form two types of solidification agent layers with good quality efficiently.SOLUTION: An excavation rod 40 is made by joining an excavation head 30 to the lower end of a rod body 1 in which unit rods 3A, 3B, 3C are connected (Figure a). The unit rod 3B is provided with a closing cylinder 7 that locks on a locking tool 13 to close an upper discharge port 6 of an outer wall and that can slide inside the unit rod 3B (Figures b, c). If the excavation of an excavation hole using the excavation rod 30 is finished, a solidification agent is discharged from a lower discharge port 34 through a liquid passage 2 from above ground, and the excavation rod 40 is raised while forming a first solidification agent layer. Next, a switching top 20 is dropped in the liquid passage 2 from above the rod body 1 (Figure c), a tapered side surface 22 of the switching top 20 releases the locking of the locking tool 13. The switching top 20 and the closing cylinder 7 fall to open the upper discharge port 6. At the same time, since the switching top 20 closes the hollow part of the closing cylinder 7 to block the liquid passage 2 below, a second solidification layer can be formed by discharging a solidification agent from the upper discharge port 6 through the liquid passage 2 from above ground.SELECTED DRAWING: Figure 1
【課題】２種類の良質の固化剤層を効率良く形成できる。【解決手段】単位ロッド３Ａ、３Ｂ、３Ｃをつなげたロッド本体１の下端に、掘削ヘッド３０を連結して、掘削ロッド４０とする（ａ）。単位ロッド３Ｂは、係止具１３に係止して外壁の上吐出口６を塞ぎ、かつ単位ロッド３Ｂ内を摺動できる閉鎖筒７を設けてある（ｂ、ｃ）。掘削ヘッド３０での掘削穴の掘削が完了したならば、地上から液路２を通って下吐出口３４から固化剤を吐出させて第１固化剤層を形成しながら掘削ロッド４０を上昇させる。次ぎに、ロッド本体１の上方から液路２内に切替駒２０を落とすと（ｃ）、切替駒２０のテーパー側面２２が係止具１３の係止を解除する。切替駒２０と閉鎖筒７は下降し、上吐出口６を開放する。同時に切替駒２０が閉鎖筒７の中空部を塞ぐので下方への液路２を遮断し、地上から液路２を通して上吐出口６から固化剤を吐出させ、第２固化剤層を形成できる。【選択図】図１
METHOD FOR INJECTING SOLIDIFICATION AGENT INTO EXCAVATION HOLE, AND EXCAVATION ROD
To make it possible to form two types of solidification agent layers with good quality efficiently.SOLUTION: An excavation rod 40 is made by joining an excavation head 30 to the lower end of a rod body 1 in which unit rods 3A, 3B, 3C are connected (Figure a). The unit rod 3B is provided with a closing cylinder 7 that locks on a locking tool 13 to close an upper discharge port 6 of an outer wall and that can slide inside the unit rod 3B (Figures b, c). If the excavation of an excavation hole using the excavation rod 30 is finished, a solidification agent is discharged from a lower discharge port 34 through a liquid passage 2 from above ground, and the excavation rod 40 is raised while forming a first solidification agent layer. Next, a switching top 20 is dropped in the liquid passage 2 from above the rod body 1 (Figure c), a tapered side surface 22 of the switching top 20 releases the locking of the locking tool 13. The switching top 20 and the closing cylinder 7 fall to open the upper discharge port 6. At the same time, since the switching top 20 closes the hollow part of the closing cylinder 7 to block the liquid passage 2 below, a second solidification layer can be formed by discharging a solidification agent from the upper discharge port 6 through the liquid passage 2 from above ground.SELECTED DRAWING: Figure 1
【課題】２種類の良質の固化剤層を効率良く形成できる。【解決手段】単位ロッド３Ａ、３Ｂ、３Ｃをつなげたロッド本体１の下端に、掘削ヘッド３０を連結して、掘削ロッド４０とする（ａ）。単位ロッド３Ｂは、係止具１３に係止して外壁の上吐出口６を塞ぎ、かつ単位ロッド３Ｂ内を摺動できる閉鎖筒７を設けてある（ｂ、ｃ）。掘削ヘッド３０での掘削穴の掘削が完了したならば、地上から液路２を通って下吐出口３４から固化剤を吐出させて第１固化剤層を形成しながら掘削ロッド４０を上昇させる。次ぎに、ロッド本体１の上方から液路２内に切替駒２０を落とすと（ｃ）、切替駒２０のテーパー側面２２が係止具１３の係止を解除する。切替駒２０と閉鎖筒７は下降し、上吐出口６を開放する。同時に切替駒２０が閉鎖筒７の中空部を塞ぐので下方への液路２を遮断し、地上から液路２を通して上吐出口６から固化剤を吐出させ、第２固化剤層を形成できる。【選択図】図１
METHOD FOR INJECTING SOLIDIFICATION AGENT INTO EXCAVATION HOLE, AND EXCAVATION ROD
掘削穴内への固化剤の注入方法および掘削ロッド
KITANI YOSHINOBU (author)
2019-03-22
Patent
Electronic Resource
Japanese
EXCAVATION ROD, EXCAVATION HEAD AND PILE-HOLE EXCAVATION DEVICE
| European Patent Office | 2019