三轴钻具

钻头直径（mm） Bit diameter(mm)

            550

          650

             850

钻杆根数（根）  Nos.of drill stem

              3

            3

               3

钻进深度（mm）  Drilling depth(m)

             30

           30

              40

钻杆直径（mm）  Drilling stem diameter(mm)

            219

          245

             245

钻杆中心距（mm）Cebteal distance between drill stem(mm)

        350*350

      450*450

         6000*600

连续墙厚度（mm）Thickness of diaphragm wall(mm)

            480

          590

             770

钻杆连接方式 Connection manner

           六方及销轴Hexagonal and locking pin