Abstract：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.
吴惠明，周文波，滕 丽. 地面出入式盾构法隧道新技术[J]. 隧道建设，2014，34(1)：12-18.(WU Huiming，ZHOU Wenbo，TENG Li. New technical shield method of ground access tunnel[J]. Construction of Tunnel，2014，34(1)：12-18.(in Chinese))
2016, Vol. 35 
