TUNNEL ABUTMENT PRECAST BLOCK STRUCTURE AND DRAINAGE STRUCTURE OF NEW CONCEPT AND METHOD CONSTRUCTING ABUTMENT USED BY THEM

摘要

PURPOSE: A precast block structure of a tunnel abutment and a new drainage structure, and a construction method for an abutment using the same are provided to simplify construction, and to improve quality by pre-casting the block structure of an abutment. CONSTITUTION: A precast block structure(100) of a tunnel abutment comprises a base block(110) and a collecting well checking block(120). The base block comprises a common duct(112), a foundation part(116), and a support part(118) for preventing a turnover. The common duct is formed in a C-shape by first and second side walls(114,115). The collecting well checking block has the same structure as the base block without the first side wall.