| 摘要 |
PURPOSE:To prevent the horizontal movement of concrete pile by a method in which the tip of a PC steel bar is driven as a back anchor into the bearing stratum, concrete is placed into the bearing stratum, and a tension is applied to the PC steel bar between the back anchor and a foundation beam. CONSTITUTION:PC steel bars 7 are penetrated into the a pile pit 5, the bottom 8 of the pile pit 5 is excavated, the tips of the bars 7 are driven into the pit 9, and grout 10 is applied to make it a back anchor 11. After a casing is drawn out, a sheath material 13 is covered on the PC steel bar 7, and concrete 14 is placed into the pit 5 and the formwork of the foundation beam 12. After the concrete 14 hardens, a prestress is introduced into the concrete 14 to integrate the bearing stratum 1, the foundation pile 4, and a building 3. No landslide occurs in the banking during the earthquake, and no damage is caused to the building. The amounts of reinforcing bars can also be greatly reduced. |
