Large-section shallow-buried bias-pressure tunnel primary support structure in silty clay area and construction method thereof

The invention discloses a silty clay area large-section shallow-buried bias tunnel primary supporting structure and a construction method thereof, and relates to the technical field of tunnel supporting, the silty clay area large-section shallow-buried bias tunnel primary supporting structure comprises a mounting assembly, a top supporting assembly is arranged on the outer side of the mounting assembly, an inner supporting assembly is arranged on the inner side of the top supporting assembly, and a detachable bottom supporting plate is mounted at the bottom of the mounting assembly. According to the large-section shallow-buried bias-pressure tunnel primary supporting structure in the silty clay area, the detachable bottom supporting plates are laid on the ground of a tunnel, the connectors are arranged at the two ends of each detachable bottom supporting plate so that the detachable bottom supporting plates can be combined and connected in a mortise and tenon mode according to the width of the tunnel, splicin