初始地应力场信息的获取是岩土工程设计和施工中所要考虑的重要因素之一，根据工程建设区域地应力实测资料，并结合水压致裂法测试没有竖直向剪力的特点，运用三维有限元回归分析方法，假定岩体自重应力和构造应力为应力场构成要素，利用多元回归分析原理，可获得计算区域的初始地应力场。通过对南水北调西线一期工程泥曲—杜柯河段运用该方法进行分析，结果表明该方法可行，回归值与实测值能较好地吻合，容易理解。

 Insitu geostress field is one of the most important factors in geotechnical designs and constructions. On basis of the insitu geostress measurement results and the fact that the hydraulic fracturing test does not incur vertical shearing forces, the insitu stress field of the calculation area can be obtained by means of 3D finite element regressive analysis method and multivariate regression analysis principle, with the assumption that the gravity stress and structural stress of the rock mass are components of the stress field. The described 3D FEM regressive analysis method is applied for the section from Niqu to Duke river on the west route of SouthtoNorth Water transfer Project of China, which demonstrates that the calculated results are in good agreement with the insitu measured data and that the described method is feasible and easily understood.