Foundation pit double-row pile retaining structure and construction method thereof

The invention discloses a foundation pit double-row pile supporting and retaining structure and a construction method thereof, and aims to provide a foundation pit double-row pile supporting and retaining structure which is good in deformation control effect, high in soil pressure resistance and high in stability and a construction method of the foundation pit double-row pile supporting and retaining structure. A foundation pit double-row pile retaining structure comprises front-row piles, front-row piles, front-row piles, rear-row piles, front-row piles and rear-row piles, the tops of the front-row piles are connected with the front-row pile crown beam; the rear-row piles are arranged in the soil body, and the front-row piles are located between the rear-row piles and the foundation pit; the tops of the rear-row piles are connected with the rear-row pile crown beam; the straining beam is connected with the front-row pile crown beam and the rear-row pile crown beam; the lap joint profile steel is inserted int