Application manner of assembly manhole and body body block null for assembly manhole

摘要

PURPOSE:To enhance the workability and the safety with a reduced diameter of excavation without necessity of sheathing by sinking a body block into the ground with the use of a blade-like hoe at the lower end by excavating and removing muck in the body block, a vertical wall pipe or the like stacked up on the body block. CONSTITUTION:A body block 1 secured at its lower end with a blade-like hoe 2 by means of bolts 3 is embedded in the ground G, and a vertical wall pipe 4 is fastened to the block by means of a fastening plate 5 (which is preferably incorporated thereto with a rotation checking flange 6) on the surface of the ground. Further, muck in the body block 1 and the vertical wall pipe 4 is excavated and removed. Further, the block 1, the vertical wall pipe 4 and so forth are sunk by their dead weights or an external force, and then an inclined wall pipe 7 is stacked on the vertical wall pipe 4 through the intermediary of the plate 5, and similarly muck in the pipe 7 is removed while it is sunk into the ground G. Further, an adjusting ring 8 and a lid receiving frame 9 are attached, and fresh concrete is filled into the bottom of the block 1 so as to form a bottom base 10.