| 摘要 |
<p>PURPOSE:To enhance working efficiency by arranging both a photographing camera and a light source at the tip end section, inserting an insertion rod provided with an injection nozzle at its side wall into a trouble originating ground, cutting a hole so as to widen it around a place required by means of high pressure injection of clear water, and thereby operating the insertion rod so as to move it around while the condition of the trouble originating ground is being assured. CONSTITUTION:The side wall of the tip end section of an insertion nozzle 1 is provided with an injection nozzle 3 and a photographing camera 4 the set back face of which is provided with a light source. Next, clear water is fed in an insertion rod 1 with pressure at a specified depth so as to be injected out of the injection nozzle 3, so that it is filled up within a bored pit. A cut wall is furthermore cut out with injection pressure increased, and slime of cut-out sediment is sucked in by means of a slime suck-in hole 7, so that the slime is thereby sucked up so as to be discharged. When the insertion rod 1 is retreated while being rotated with the pit wall ground cut out by means of the high pressure injection flow of clear water as mentioned above, a cavity filled up with clear water is developed. Clear water injection is suspended when the pit comes down to the place where a trouble originating area can be assured, floc precipitation agent is then fed therein with pressure. The photographed image within the pit taken with the photographing camera 4 operated, is then sent to an image receiving equipment 12, so that the condition within the bored pit by a receiving TV monitor 12 is thereby assured by an operator.</p> |
