| 摘要 |
PURPOSE:To certainly bear propulsory reaction force of an inclined shaft excavator excavating diagonally upward, and to execute formation of reaming part easily by means of mechanical excavation after excavation of the inclined shaft. CONSTITUTION:In a reaction force bearing body 1 that bears propulsory reaction force of an inclined shaft excavator by working of shield jacks 11, the reaction force bearing body 1 is constructed of forms 3 that are erected along walls 2 of an excavated inclined shaft and concrete that is cast to a space between the walls 2 of the inclined shaft and the forms 3. While the cast concrete 4 is adherent monolithically to the walls 2 of the inclined shaft, the forms 3 are stuck in increased adherence to the cast concrete 4 with their holding surfaces 5 formed to their surfaces by providing protuberances and inclined faces. Thereby, load of the inclined shaft excavator 6 applied to the forms 3 through the shield jacks 11 can be certainly borne by the walls of the inclined shaft. |
