地面出入式盾构法克服传统盾构法需要在两端修建始发和接收工作井的弊端,实现地表出发和地表接收的全过程盾构施工新技术。采用大型模型试验、数值仿真和工程验证手段,系统研究地面出入式盾构法隧道新技术掘进的关键问题,揭示地面出入式盾构法穿越不同阶段的地表沉降规律;依托地面出入式盾构法首次在我国南京城际快速轨道秣将区间隧道工程的示范应用,探索分析该新方法在工程中主要施工参数的合理选择和有效的控制技术;模型试验、数值仿真结果与工程实测结果获得一致的规律,可为该新方法的进一步推广应用打下坚实基础。
The creation of ground pass shield tunnelling(QPST) method has conquered the disadvantage of constructing working shaft for shield launching and arrival which is a typical of traditional tunnelling method, and making an innovative turning point on shield tunnelling history. This paper first presents a detail investigation on the key problems of GPST method by adopting large-scale model test, numerical simulation and in-situ monitoring. The surface settlement characteristics of different crossing stages of GPST method have been revealed. In addition, an engineering application of this new method was carried out in Moling-Jiangjun interval of Nanjing intercity fast track; some key tunnelling parameters and effective measures were explored. Comparison was also done between the monitoring data, model test results and numerical results; it is shown a good agreement with each other; and a sound basis is established for the broad application of GPST method.