南京上软下硬地层盾构半敞开式掘进关键技术研究

Key Techniques for Semi-Open Shield Tunnelling in Upper-Soft Lower-Hard Strata

上软下硬地层造成盾构施工风险增加,引起地表沉降增大。文章以南京软硬不均地层盾构施工为工程背景,通过分析盾构掘进过程中开挖面的稳定性及相关施工参数的规律,提出了复合地层中适宜的盾构掘进模式及辅助措施,地表沉降分析验证了该施工方法的可行性和可靠性。

Considering that upper-soft lower-hard strata may increase construction risks and cause ground settlement during shield tunnelling, and using the unhomogeneous strata in Nanjing as an example, this paper analyzes the stability of the working face and relevant construction parameters during tunnelling, and then proposes suitable tunnelling modes and auxiliary measures.