Method for constructing underwater strongly-weathered rock stratum steel sheet pile by using rotary drilling rig

• Main Authors: WANG MIN, ZHANG LONG, TUO SHENGBAI, HUANG HAIBO, ZHAO ZHUO, LI XU, TAI LIANHUAN, XIAO JINGHONG, ZHOU XIAOSHENG, ZHANG FAN
• Format: Patent
• Language: Chinese; English
• Published: 27.09.2022
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; EMBANKMENTS; EXCAVATIONS; FIXED CONSTRUCTIONS; FOUNDATIONS; HYDRAULIC ENGINEERING; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; SOIL SHIFTING; UNDERGROUND OR UNDERWATER STRUCTURES

The invention discloses a method for constructing an underwater strongly weathered rock stratum steel sheet pile by using a rotary drilling rig, which comprises the following steps of: drilling a hole in a first large pile casing to form a first backfill hole, inserting a first small pile casing from the first large pile casing, backfilling clay in the first small pile casing, and forming a second backfill hole in the first backfill hole; embedding a second large pile casing by clinging to the outer wall of the first small pile casing, drilling in the second large pile casing to form a second backfilling hole, inserting the second small pile casing from the second large pile casing, backfilling clay in the second small pile casing, pulling out the first small pile casing, realizing backfilling by collapsing the clay in the first small pile casing, and repeating the steps until the second backfilling hole is formed in the second large pile casing. And the rock stratum in the center position of the steel sheet