The invention discloses a construction technology and construction method for a large-particle-size
pebble stratum super-deep foundation pit in the strong water
permeation environment of a Yellow
River flood plain. The construction technology comprises enclosing structure construction,
dewatering construction and main body structure construction and is characterized in that the enclosing structure construction consists of a 1.2m-thickness
reinforced concrete underground continuous wall and a 0.8m-thickness plain concrete water stopping wall, a lining wall of a foundation pit wall and the continuous wall adopt a superimposed wall structural form, end reinforcing
sleeve valve pipes are grouted, and a main body structure adopts fully enclosed water-proof design; the
dewatering construction adopts a treating means combining a continuous wall water stopping curtain and foundation pit bottom sealing in-pit
dewatering; and the main body structure construction is carried out in a way that the main body is of a five-layer cast-in-place
reinforced concrete box type framework structure, 34 lattice columns are arranged in the foundation pit to support the weight of the main body structure, construction is carried out by an open excavation reverse construction means, and excavation construction is carried out for six times. The technology and the method overcome the defects of the traditional construction of the large-particle-size
pebble stratum super-deep foundation pit in the strong water
permeation environment of the Yellow
River flood plain and can provide a great reference for further similar
engineering.