Taking the construction of Shikui Road Station to Labor Park Station of Dalian Metro Line 5 as the background, a delicate blasting design was used to control the influence of interval tunnel construction on adjacent buildings. In order to prevent the risk of settlement of adjacent bridge piles, a deep hole pre-reinforcement method of non-shrinkage double-liquid grouting (WSS) was used on the tunnel face. The blasting parameters of the tunnel face were optimized, and a detailed blasting design was given by combining with the step sequence of the tunnel construction method (step method and CRD method). The right line utilized the step method, while the left employed the CRD method. The upper bench of the step method and the upper left chamber 1 of the CRD method were blasted twice: initial cutting blasting to create an empty surface followed by secondary blasting to reduce vibration. The unit consumption of explosives in the cutting part was 1.87~2.33 kg/m³ and 0.40~0.80 kg/m³ in other sections, with the Ms-15 nonel detonator used for maximum section control. In addition, the blasting vibration attenuation law formula was inverted through blasting vibration monitoring, facilitating a pre-check for safety. Furthermore, a numerical simulation using the SPH method was conducted for cutting blasting near side-piercing bridge piles with a single-stage charge of 0.30 kg. The response of the bridge pile located 5 m from the detonation point and subjected to explosive load was analyzed. The blasting operation in this area had been completed, and the piers were safe and sound, indicating that the construction scheme for the side-crossing bridge pile section was feasible. Additionally, the stress wave propagation in strata and bridge piles was simulated, showing speeds of 3280 to 3590 meters per second in bridge piles, and an average speed of 1620 meters per second in rock and soil layers. The propagation speed in bridge piles was significantly higher than in the weathered and clay layers. The SPH method proved effective for large-scale particle calculations without requiring supercomputing power for explosives and adjacent rocks.