| 用水准资料计算剪应变公式的推导 |
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| 引用本文： | 薄万举,郭良迁.用水准资料计算剪应变公式的推导[J].大地测量与地球动力学,1997(4). |
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| 作者姓名： | 薄万举 郭良迁 |
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| 作者单位： | 国家地震局第一地形变监测中心 |
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| 基金项目： | 国防科工委9401DI项目 |
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| 摘 要： | 严密推导了利用水准资料计算地壳垂直剖面内剪应变量的两套公式，并分别阐述了其不同的物理含义和地质含义。这两套公式分别表示垂直剖面内两组不同方向间的地壳表层的垂直剪应变，第一个模型表征地壳表层倾斜变化的程度，第二个模型表征地壳表层曲率变化的程度，二者从不同的侧面反映了地壳变化的状态。
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| 关 键 词： | 水准测量 地倾斜 剪应变 |
DEDUCTION OF FORMULA FOR CALCULATING SHEAR STRAIN WITH LEVELING DATA |
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| Bo Wanju and Guo Liangqian.DEDUCTION OF FORMULA FOR CALCULATING SHEAR STRAIN WITH LEVELING DATA[J].Journal of Geodesy and Geodynamics,1997(4). |
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| Authors: | Bo Wanju and Guo Liangqian |
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| Abstract: | For earthquake situation prediction and deformation precursor judgment,it is of important significance that the shear strain in vertical section is calculated with leveling data in large area.Some research results in this aspect are reported.But it is found that the models for calculation of shear strain,adopted by different authors,are not identical and their physical and geometric meanings are not very clear yet.Starting with basic concept in this paper, two formulae for calculating shear strain with leveling data in vertical section are strictly inferred, and their different physical and geological meanings are expounded respectively. The two formulae separately give the different shear strains between two group directions in crustal vertical section. One model expresses the variation extent of crustal tilt, another expresses the variation extent of crustal curvature.They are reflections of crustal deformation state from different side. |
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| Keywords: | leveling crustal tilt shear strain |
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