本文介绍了郑州地铁2号线广耀新耀国区间EPB盾构在全断面富水粉细砂层中掘进遇到的一系列困难时，采取的一些相应改进措施与掘进参数调整，最终达到安全下穿重大环境风险的施工成果。%This paper introduces some corresponding improvement measures and tunneling parameters adjustment of tunneling problems of EPB shield in full face water-rich silty fine sand layer in Guang-Xin-Guo Section of Zhengzhou Metro line 2. At the end, it gets the construction results of secure underneath pass important environmental risk.
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