The best design is made according to the design and analysis of practical retaining structure with double-row piles and as well as the revision of different programs with PKPM.

Combining with an engineering example, the author presents the methods of double queue piles, appliance conditions and questions that should be paid attention to in design and construction.

Then, all the cylinders are distributed in two parallel lines, which makes the problem turn into the vibration isolation using double row of elastic piles.