A underground water boring beat guide combined swelling tube

摘要

The present design is that, the center of the heart to directly drilling a small bore in the excavation defining the center under the installed and then the grouting pipe construction a large diameter drilling static conditions and grouting pipe about a groundwater heart drilling bit induction device for mounting the inflatable tube the center being such that, and the ground water contaminated with the drilling tube expansion match made for the purpose of setting so as not flowing into the small-diameter drilling process.; The disclosed subject innovation a drilling bit for groundwater heart mounting the inflatable tube of the induction apparatus, while the whole cylindrical structure inside the large diameter portion 111, the source supplementary section (112) and said small diameter leading to the insertion of the blind drilling bit from the top is a small diameter portion 113, the drilling bit is inserted into a row formed of a funnel shape, the fluid injection port 114 is formed in the inductive device body 110 coupled to the lower end of the grouting pipe (P); In addition, the guidance system the reduced processing compared to the body between the peripheral portion where the ball is fixed through the tube a band (123) consists of inflatable tubes 120 are inflated is in communication with the fluid inlet.