... PUMP IN FOUNDATION PIT Construction methods for foundation pit Bottom foundation treatment Concreting spread footing Fill up the foundation pit Organize spread footing construction  Requirements:... FOOTING Construction methods for foundation pit Bottom foundation treatment Concreting spread footing Fill up the foundation pit Organize spread footing construction  Requirements:  After the foundation. .. Hầm CHAPTER IIIa – CONSTRUCTION OF THE SPREAD FOOTING ON NATURAL GROUND Trường Đại học Giao thông Vận tải Bộ môn Cầu Hầm MAIN CONTENTS  Construction methods for foundation pit  Bottom foundation