MUDDY WATER SCATTERING PREVENTION JIG AND DRILLING SYSTEM

摘要

To provide a jig capable of effectively preventing muddy water from scattering.SOLUTION: A muddy water scattering prevention jig 100 comprises: an attachment portion 110 attached to an upper end portion of a casing 200 driven up and down by an all-round rotary excavator 300; and an arc-shaped side wall portion 120 extending above the attachment portion 110. Even if crushed concrete falls into the casing 200 filled with muddy water, it is possible to prevent the muddy water jetted to the ground from being scattered by attaching the muddy water scattering prevention jig 100 to the upper end of the casing 200.SELECTED DRAWING: Figure 1