STARKE’s HHP20 hydraulic impact hammer with 300KJ striking energy worked in GAOLAN prot in ZHUHAI. We piling the φ1000mm，L36000mm steel tube by vibratory hammer, then connect another 21000mm length pile driven by hydraulic hammer. It took 20 minutes for one pile with the strike frequency of 67stroke/minute. The final construction quality of piles are fully satisfied by the contractor.