| 摘要 |
PURPOSE:To decrease the size of a machine and to reduce a term of works, by a method wherein a vertically slidable excavating mechanism and a trench processing mechanism are provided, soil is discharged as a trench is continuously excavated, and concrete is pressed therein to build an underground wall. CONSTITUTION:A chain 21 for cutter and a excavating blade 22 are rotated in a given direction, an excavating mechanism 15 is gradually lowered to start excavation, and a trench is continuously excavated as a self-running vehicle 1 is advanced. Both side edges of a support plate 32 of a trench processing mechanism 30 are slightly bent backward, concrete is pressed in for injection, and an underground wall of concrete is built simultaneously with excavation of the trench. When excavation of the trench is completed, the excavating mechanism 15 and the trench processing mechanism 30 are raised to a raising end position and is moved to other spot. This reduces an occupying area during a work, enables excavation of the trench at a limited space, and permits utilization of the filling reaction force of concrete as the advancing force of a machine. |
