Construction method for open ring pipe segment of transverse traffic channel of shield tunnel

The invention provides a construction method of an open ring pipe segment of a transverse traffic passage of a shield tunnel, which comprises the following steps of: determining a first axial force of a complete pipe segment structure under the action of a calculated value of an external load and a maximum value of an annular opening amount between two adjacent splicing block units after opening by determining the calculated value of the external load on the open ring pipe segment; determining a circumferential prestress compensation value required for controlling the maximum value of the circumferential opening amount within a preset range, applying the circumferential prestress compensation value to an internal supporting structure for supporting the split ring pipe segments, then applying circumferential prestress to the split ring pipe segments, dismantling the splicing block units located at the opening positions and applying the circumferential prestress compensation value to the opening supporting stru