中文摘要：

传统的盾构隧道施工方法带来了现场附近大量拆迁及路面交通拥堵,施工过程中风险增大等诸多问题。研究新型地面出入式盾构法隧道（GPST）施工技术,结合南京机场线工程,对施工过程中土压力、孔隙水压力、水平位移、分层沉降等数据进行现场监测,并针对浅覆土、超浅覆土、负覆土3种不同工况,分别分析各监测结果变化的原因,并提出合理、有效的注浆参数。结果表明：土压力受盾构推进影响明显的范围与覆土深度有关;盾构到达负覆土右侧底部管片受同步注浆压力影响最大;0.5D覆土下孔隙水压力在切口到达前3环产生明显的影响,而-0.3D覆土下孔隙水压力受影响很不明显;3种工况下土体水平位移规律不明显,当注浆参数合适,可以显著减小因盾构推进引起的纵向位移;在负覆土、超浅覆土施工期间,土体左、右两侧分层沉降并不均匀。实际工程的现场试验监测结果为今后其他类似实际工程的应用提供参考性建议。

英文摘要：

The traditional methods of shield tunnel construction bring about a large amount of problems such as structure demolition and severe traffic congestion in the process of construction. The construction technique of ground pass shield tunneling（GPST） method applied in the Nanjing airport line was investigated. Soil pressure, pore water pressure, horizontal displacement and vertical settlement were monitored in the construction site. The monitored results were analyzed for three different load cases such as the shallow overburden area, the super shallow overburden area and the negative overburden area. The reasonable and effective grouting parameters were presented. The results show that there is a relationship between the depth of the overburden soil and the soil pressure of the area affected by the shield tunneling. The right area of the negative overburden soil is mildly affected by the synchronous grouting, while the bottom segments are considerably influenced. The pore water pressure under 0.5D overburden condition has a significant effect when the notch to the first three rings, but the pore water pressure under -0.3D overburden is not obviously affected. The horizontal displacements in soil of the three cases are differently distributed. The less the depth is, the more the displacement is. In the negative and super shallow overburden soil area, the settlement of two sides are not evenly distributed and this may be attributed to the unbalanced stress of the two sides when the tunnel is constructed in the curved segment.