| 摘要 |
PURPOSE:To prevent excessive excavation of the ground by a method in which excessive PC steel materials are inserted in a lapped manner into the holes of concrete blocks housed in an excavated hole, and the last block is clamped with the excessive PC steel materials. CONSTITUTION:Box-shaped concrete block 4, 5, and 6 have paths 4P, 5P, and 6P through PC steel wires are passed, having a diameter large enough to be inserted with at least PC steel wires 15 and 16 in lapped state, or slightly larger than the conventional hole. The concrete blocks 4, 5, and 6 housed with PC steel wires 15 and 16 are set in an excavated hole (b). Final concrete block 7 or 8 is set in the hole (b), the PC steel wires 15 are pulled out of the block 4 or 6 and inserted into the hole of the block 7 or 8, and these blocks are clamped. Unnecessary excavation can thus be avoided. |
