【摘要】 初始应力场对于岩土工程数值计算至关重要,但通常难以准确确定。目前,由现场实测资料反演初始地应力场的方法很多,且各有优势。与以往不同,作者提出了在隧道等地下工程二维计算中,以现场实测的二次应力来确定计算模型的边界条件,从而得到与实际相符的初始应力场来进行反演分析的新思路和新方法,获得了十分满意的效果,该法较以往方法经济、准确,且容易操作,可为今后同类课题借鉴。结合实际工程,采用该方法得到了计算分析域的初始应力场的分布规律,与实测结果基本一致,证明了该方法的正确性和实用性。更多还原

【Abstract】 Initial geostress is essential for geotechnical engineering numerical simulation,but usually can not be easily determined.Based on the measured geostress data,there have been many kinds of methods with respective advantages for initial geostress field back-analysis.Unlike past research methods,this paper presents an idea and a method for establishing the stress boundary condition of numerical model of tunnel engineering by the secondary stress value measured in the field,and then the back analysis research is done based on the initial stress field established before.Satisfactory effect was achieved.Compared with past methods,this method is very economical,exact and operable,which provides a new and valid way for similar research subjects in the future.Combined with practical engineering and based on this method,We established the geostress distribution characteristics which was in accordance with the measured value very well,and this confirmed the correction and practical value of the mentioned method.更多还原