| 摘要 |
PURPOSE:To conduct economical execution while forming stratiform cured bodies, strength thereof becomes larger successively toward a hole bottom, by compounding a stabilizing liquid so that low strength is obtained in an upper section and high strength toward a lower section when solidifying the stabilizing liquid in a ditch hole. CONSTITUTION:A tremie pipe 2 is inserted up to the bottom of the ditch hole 1 excavated by using non-curing muddy water 3, selft-curing muddy water 4 for low strength is inserted first through the tremie pipe 2, and the muddy water 3 is moved upward and replaced with the muddy water 4. Self-curing muddy water 5 for high strength is inserted to the hole bottom section through the tremie pipe 2, the muddy water 4, 3 are shifted upward under conditions that they are left as they are, and the hole bottom section is replaced with the muddy water 5. Lastly, mortar or concrete 6 is inserted to the hole bottom section through the tremie pipe 2, the hole bottom section is replaced, and the ditch hole section is foot-protected. |
