Abstract: The rolling angle of a shield would increase during tunneling. Accordingly, a new correction method for the rolling angle of the shield using steel wedge structure is proposed based on the shield tunneling project between the Chengzhan station and the Sijiqing station of Hangzhou metro line 7. Furthermore, the torque calculation formula is developed, the calculation methods for the associated parameters are provided, and the correction method is validated in a real-world project. Finally, the influence of tunnel depth, soil type, shield diameter, etc., on the number of steel wedge structures is analyzed. The results show that the steel wedge structure can quickly and effectively correct the rolling angle of the shield.

Key words: earth pressure balanced shield, rolling angle, steel wedge structure, correction device, construction technology