? After SH22 hydraulic pneumatically actuated rig has finished projects in Wuxi, Nanjing and other places, it presents its elegant demeanor in Yanan Road East tunnel. According to what we know, the underground layer between 7 m and 12 m under Yanan Road East Tunnel is the mixtures of cement and clay agglomeration, SH22 successfully drilled such the layer which can not be done by the hydraulic wall grab, showing its practicability and superiority.
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? SH 22 hydraulic pneumatically actuated rig is one new type of foundation construction equipment which is mainly applicable to drill bedrock. It integrates the technical merits of the rotary drilling rig, the air actuated down hole hammer and hydraulic diaphragm wall grab and has excellent performance. The hammer bottom can impact rock to break it and discharge the residues in clockwise and counterclockwise cycle to drill the large cross section rigid terrane continuously and rapidly. Besides, the host machine can conveniently exchange the job practice between the drilling, the impaction and the drilling with CFA. The diaphragm wall grab has been called the “NO.1 brand” in our country, now, SH 22 has become the new business increase point of Shanghai Jintai.
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