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一、引言为了使地下工程的设计计算符合实际情况,必须要知道地层中的初始应力场和材料性质。虽然,初始应力和材料常数可通过各种现场试验直接进行量测,但由于测试方法复杂,费用昴贵加之量测结果离散性很大,实际应用困难较多。为了克服这些困难,最近国外发展了利用施工期间的位移测量来反馈计算初始地层应力场和材料性质,取得了很大的成功。有关这方面研究,国内外都做了不少工作。
I. INTRODUCTION In order to make the design calculation of underground engineering conform to the actual situation, it is necessary to know the initial stress field and material properties in the formation. Although the initial stress and material constants can be directly measured by various field tests, due to the complexity of the testing methods, the cost is high and the measurement results are very discrete, and practical applications are more difficult. In order to overcome these difficulties, the use of displacement measurement during construction has recently been developed abroad to feed back and calculate the initial formation stress field and material properties, and has achieved great success. Regarding research in this area, a lot of work has been done at home and abroad.