The groove sidewall instability is the biggest threat to the wall construction,especially in the trench excavation and reinforcement cage lifting process,the weight and construction vibration for the groove machines and its attached equipment are unfavorable to the tank wall stability.Taking the example of typical alluvial geological condition,we analyze the tank wall deformation and safety coefficient of the trench excavation process and the reinforcement cage hoisting process,and discuss the effectiveness of various measures from increase mud severe,jet grouting pile to reinforce the soil surface of airport and lowering of water-table basing on the strengthening method of reinforcing.Through the comparison and analysis,we put forward suggestions to choose of stability on the groove wall reinforcement effect in the actual engineering stability measures.