盾构姿态控制过程中通过尽量减小各区压大小差异，可降低管片受剪开裂和纵向错台风险。为实现目标区压均衡分配，构建均衡分配几何模型，推导区压均衡约束条件，结合目标总推力和目标力矩条件，推导可实现任意多个区压均衡分配的计算公式。对比验证结果表明： 1）相对于传统伪逆法和人工分配方法，所提出的均衡法有效提升了区压的均衡性，明显降低了相邻分区压差。2）基于区压均衡原则，提出不同总推力对应的力矩/力心极限边界解算方法，并描述了对应规律，即随着总推力由0 kN增长至分界值，同一方位的极限力矩由0 kN·m线性增至最大值，而极限力心半径为定值；当总推力继续增至最大总推力，极限力矩从最大值线性衰减至0 kN·m，极限力心也从最大值非线性衰减至0 m。3）基于所述极限边界，可避免力矩/力心设定超界引发的控制风险。

The risk of cracking and longitudinal dislocation of the shield tunnel segment could be reduced by minimizing the pressure deviation of each partition during the posture control of the shield. To realize equalization allocation, a geometric model is constructed and the partition hydraulic constraint is deduced. Based on the targeted thrust and moment conditions, a partition hydraulic pressure calculation formula that could realize the equalization allocation for many partition hydraulics is derived. Comparative validation results indicate that compared with the traditional pseudo-inverse method and manual allocation method, the proposed equalization method effectively improves the equalization of the allocation results and significantly reduces the pressure deviation between adjacent partition hydraulics. Based on the equalization principle, the moment/center of thrust limit boundary solution method corresponding to different thrusts is proposed, and the corresponding laws are described: with the increase of the thrust from 0 to the critical value, the limit moment in the same orientation increases linearly from 0 to its maximum while the radius of the limit center of thrust is a fixed value; as the thrust gradually increases to the maximum from the critical value, the limit moment linearly decays from the maximum to 0, and the limit center of thrust nonlinearly decays from the maximum to 0. Based on the limit boundaries, the control risk caused by the moment/center of thrust setting exceeding the boundaries can be avoided. This provides a theoretical basis for the equalization allocation of partition hydraulic pressures and moment parameter setting of the shield and automatic control of shield posture.