Boring test with rotary drilling rig good for hard clay

Boring test with rotary drilling rig.

This is the soil boring test with rotary drilling rig by each setting of speed. It has the hole for the water injection by pumping from water tank and resemble with wash boring but it is action so cold with your hand on drilling rod which is hard for forecast of soil layer changing while rotary drilling rig is operating, Continue reading “Boring test with rotary drilling rig good for hard clay”