The earth retaining wall and waterproof construction technique for which cast in place concrete pile and grouting column was used

摘要

PURPOSE: A waterproof construction method of an earth retaining wall using a cast-in-place concrete pile and a grouting column is provided to improve constructability by completely preventing water leakage between cast-in-place concrete piles. CONSTITUTION: A waterproof construction method of an earth retaining wall using a cast-in-place concrete pile and a grouting column is as follows. Excavation holes are formed in the ground. Steel pipe casings are inserted into the excavation holes. Slime inside the steel pipe casings is discharged to the outside. Reinforcement cages(16) or H-beams(18) are inserted into the steel pipe casings. Tremie pipes are installed in the excavation holes in which the reinforcement cages or the H-beams are inserted. Concrete is placed into the tremie pipes, and the steel pipe casings are upward drawn. The placed concrete is cured, and the top of the cast-in-place concrete piles(22) are polished. Cap beams are fixed to the top ends of the cast-in-place concrete piles. Grouting holes(26) are formed between the cast-in-place concrete piles. Grouting columns(30) are formed by filling the grouting holes with grout materials using JSP equipment.