Construction method of deep large-particle-size sandy gravel covering layer riverbed lock catch steel pipe pile cofferdam

• Main Authors: WEI YONGNENG, LIU YANAN, SONG ZUODONG, YAN JUN
• Format: Patent
• Language: Chinese; English
• Published: 19.05.2023
• Subjects: EMBANKMENTS; EXCAVATIONS; FIXED CONSTRUCTIONS; FOUNDATIONS; HYDRAULIC ENGINEERING; SOIL SHIFTING; UNDERGROUND OR UNDERWATER STRUCTURES

A deep and thick large-particle-size sandy gravel covering layer riverbed lock catch steel pipe pile cofferdam construction method comprises the steps that according to the diameters of lock catch steel pipe piles at the four corners, the position of a C-O-shaped lock catch of each lock catch steel pipe pile is determined, hole guiding is conducted, and the hole guiding depth is the inserting and driving design elevation of the lock catch steel pipe piles; inserting and driving lock catch steel pipe piles after hole guiding of the single-side lock catch area is completed, inserting and driving the lock catch steel pipe piles at the two corners, close to the upstream side, of the foundation pit, and welding a guide frame ox horn and a guide frame after inserting and driving are in place; a limiting structure is arranged on the guide frame, during inserting and driving, the pile backs of the lock catch steel pipe piles abut against the guide frame, and the lock catch steel pipe piles are slowly put down through