Rotary drilling hole filling pile, also known as positive and negative circulation hole filling pile, is the most commonly used and widely applied pile forming method in China, which is to use general geological drilling rigs under the condition of mud wall protection, slow drilling, slagging throug Read More

For a rotary drilling rig, the softer the geology, the better, right?It's just not quite right. What we know about geological strength,In geological exploration reports, there are generally two ways to describe geological intensity:Ultimate bearing capacity kPa and uniaxial compressive strength MPa. Read More