为解决盾构施工水平姿态控制难题，针对隧道掘进姿态调整主要依赖于经验关系和人为控制，而相关的理论分析较为欠缺的现状，基于二维盾体结构提出一种力学与水平姿态理论分析模型。在综合考虑地层参数、油缸推进力、地层反力、现场施工措施的基础上，将盾构姿态引入盾构水平受力平衡分析中，建立关于盾构水平姿态的理论模型。理论分析结果表明： 1）盾构姿态控制与分区压力密切相关，同时受土体刚度和总推力的影响； 2）通过与现场实测数据的对比分析，验证了理论模型的适用性； 3）该理论模型参数简单，易于验算，可实现较准确的姿态预测，为盾构姿态控制问题提供了有效的理论支撑和现实依据。
Currently, the
shield tunnel attitude is based mainly on human experience and lacks relevant
theoretical analysis. Accordingly, to effectively control the horizontal
attitude in shield tunneling, a theoretical analysis model for the mechanical
behavior and horizontal attitude of the shield based on a twodimensional
shield structure is proposed. A theoretical model for shield horizontal
attitude is established by introducing shield behavior into the analysis of the
horizontal force balance of the shield, considering the stratum parameters, the
jack forces, the soil pressure, and the construction measurement of engineering
practices. The theoretical analysis results show the following: (1) The shield
attitude control is closely related to the jack pressure and is affected by the
soil stiffness and the total thrust. (2) The applicability of the theoretical
model is verified by comparing it with the field observed data, and it is
confirmed that the theoretical model shows the advantages of simple parameters
and easy derivation. (3) Accurate attitude predictions can be achieved, which
provides effective theoretical support and a practical basis for shield
attitude control.
