The invention discloses a
pipe-jacking construction method for a large section of a complicated formation. The
pipe-jacking construction method for the large section of the complicated formation comprises the steps of control of settlement of existing structures in a
pipe-jacking construction process, control of construction parameters during jacking in different geological formations, control ofjacking in a formation which is soft in top and hard in bottom, control of jacking in a hard rock stratum and line-type control in curve pipe-jacking and process. A seam at a curve pipe-jacking jointmeets the requirement, it ensures that water does not leak from a seam between pipes, the
engineering quality is ensured, a jacking pipe can successively downwards penetrate through a high-speed waterguiding pipe and a
sewage pipe, the safety of various structures is ensured, it can be ensured that settlement of a pipe-jacking line is in a controlled state, potential safety hazards are reduced, settlement can be controlled effectively, the jacking pipe can safely and smoothly penetrate through the formation, the safety of opening a bin for changing a knife can be ensured, and smooth jacking of a pipe-jacking
machine under the condition of hard rocks is ensured.