Construction Technology of Freeze Sinking Method in Inclined Shaft Soil Layer

During Construction of auxiliary inclined shaft of Panta Colliery by freezing method, the freezing construction design scheme was optimized in order to m ake the shaft drive safely through the bulking clay stratum and freezing aquifer with large shaft cross-section. The optimization adopted the key technology of the area a nd local freezing, second supporting, the transportation of large bucket, machinery excavation, the lining with hydraulic form.This new technology solved the difficult pro blems which we never met before, such as shaft with large cross-section, construction complexity.Meanwhile, it saved large labors, reduced the intensity of labors, impr oved the construction speed and quality, and achieved the goal of safe construction.