为选配更具适应性的刀盘，对引绰济辽输水工程配置多梯度二次周边锥破机构的辐板式刀盘和面板式刀盘2种不同结构形式刀盘进行关键结构设计研究。采用有限元法得到结构的应力分布规律，通过数值计算得到刀具布置在力学性能上的分布情况。结果表明： 1）辐板式刀盘开口率更大，尤其中心区域开口大，针对黏土、泥砾等复合地层，“结泥饼”的可能性会降低； 2）2种刀盘结构形式均能满足结构强度要求，其中面板式刀盘结构强度更具优势； 3）面板式刀盘的类“米字形”滚刀布置方式产生的径向不平衡力和倾覆力矩更小，2种结构方式的数值均较小，满足设计要求； 4）综合工程地质情况、结构形式、强度分析、刀具布置、力学性能及其他多方面因素考虑，选择辐板式刀盘结构作为本工程的刀盘主体结构。通过在工程项目中的实际使用情况可知，刀盘掘进中运行稳定，具有良好的地质适应性，满足施工要求。

In this study, the critical structural designs of pipe jacking machine with spokeplate cutterhead and faceplate cutterhead used in the Chao′er riverWest Liaohe river water diversion project are investigated. The stress distribution laws are derived using finite element method, and the mechanical properties of the cutter arrangement are characterized using numerical calculations. The results reveal the following findings: (1) The opening rate of the spokeplate cutterhead, especially the opening in the central area, is larger than that of the faceplate cutterhead. The possibility of mud cake(e.g., clay and gravel) to be present in the composite stratum is less. (2) Two kinds of cutterhead structural forms satisfy the structural strength requirements, wherein the faceplate cutterhead exhibits higher structural strength. (3) According to the analyzed mechanical properties, the unbalanced radial force and overturning moment generated by the doublecross disccutter arrangement of the spokeplate cutterhead are smaller than those of the faceplate cutterhead, and both cutterheads fulfill the design requirements. (4) Considering the geological conditions, structural form, strength analysis, cutter layout, and mechanical properties, the spokeplate cutterhead structure is selected as the primary structure in this project. Through project application, the adopted cutterhead operates stably with appropriate geological adaptability.