When the foundation pit is deep, the groundwater level is high, and there is no construction precipitation, sheet piles are used as the supporting structure, which can not only retain soil and waterproof, but also prevent the occurrence of quicksand. Sheet pile supports can be divided into anchorless sheet piles (cantilever sheet piles) and anchored sheet piles. The commonly used steel sheet piles are U-shaped steel sheet piles, also known as Larsen steel sheet piles.