盾构掘进机关键技术及模拟试验台现状与展望

Key technologies of shield tunneling machine and present status and prospect of test rigs for tunneling simulation

针对盾构机在掘进过程中穿越复杂地质时,负载和动态过程难以用理论模型准确描述的难题,采用模拟试验方法完善盾构设计和取得关键技术的突破.归纳盾构设计和制造中所涉及到的6项关键技术,介绍盾构掘进模拟试验方法及模拟试验中的相似关系,重点论述体现盾构模拟试验技术先进性的模拟试验平台的研制进展和现状.结合工程实际和未来发展趋势,分析并总结现有模拟试验平台存在的局限性,研制具有功能多样且集成度高、模拟地质环境覆盖范围宽、掘进土体边界影响小等特点的新一代盾构综合模拟试验平台.

It is very difficult to describe the externalload and dynamic process accuratelywhen a shield tunneling machinegoes through complex and uncertain geological layers. The simulating experimentbecomes necessary for perfecting the design and developing the new related technologiesofshield tunneling machine. Reviewing six kinds of key technologies involved in the design and manufacturing of shield tunneling ma- chines, the simulating method and the similarity in the tunneling experiment, this paper discussedthe de- velopment progress and current status of test rigs embodying the advanced simulatingexperimenttechnolo- gy in detail. Combing with the project practice and futuredevelopment, this paper also put forward the shortcomings of the existed test rigs. As a result, a new comprehensive test rig for shield tunneling machine was developed, which was characterized bymultifunction, integration, a wide rangeofsimulated geoenvironments and small boundary effect.