ABSTRACT
As in many other tunnel projects (Crippa et al. 2006, Hu et al. 2006 & Zhao et al. 2005), eight cross passages between the two tubes of ShanghaiYangtze River Tunnel (see Figure 1) are constructed by artificial ground freezing method. Shanghai Yangtze River Tunnel is situated at the estuary of theYangtze River, where saltwater intrusion occurs frequently (Shen et al. 2003). It is supposed that the saline concentration of soil at the riverbed is higher than usual, thus the higher risk in constructing the cross passages by artificial ground
freezing method. The properties of frozen saline soil have a remarkable change (Roman et al. 2004) which is disadvantageous to the construction. As a result, it is of great necessity to proceed a research of the properties of the saline soil such as the salinity, the freezing point of the saline soil and the frozen soil strength, etc. The research concentrated on the basic geotechnical parameters, the physical mechanic parameters and the thermodynamic parameters of the designed soil layers, including gray mucky clay ([4]), gray clay ([5]1), gray clayey silt ([5]2), gray silty clay ([5]3) and gray clayey silt ([7]1-1).
