| 岩体特性和岩体应力推算的回归分析 |
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| 引用本文： | 黄建安,王思敬.岩体特性和岩体应力推算的回归分析[J].地质科学,1984,0(2):173-185. |
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| 作者姓名： | 黄建安 王思敬 |
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| 作者单位： | 中国科学院地质研究所 |
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| 摘 要： | 岩体的开挖改变了岩体的边界条件,扰动了岩体的原始应力场,并使岩体产生变形。岩体的这种变形综合地反映了岩体的结构和地质构造环境,变形的量值及其变化规律直观地反映了岩体的稳定性。量测分析岩体的变形对监视预测岩体的失稳和不支护安全运营的期限、确定岩体加固处理的方法等都有重要的意义。因此,岩体变形的量测在地下洞室、边坡等岩体工程的勘探、施工和运营中都广泛地开展着。
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| 关 键 词： | , |
| 收稿时间： | 1982-12-22 |
| 修稿时间： | 1982-12-22; |
REGRESSION ANALYSIS OF THE PROPERTIES AND STRESS FIELD OF ROCK MASS |
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| Huang Jianan,Wang Sijing.REGRESSION ANALYSIS OF THE PROPERTIES AND STRESS FIELD OF ROCK MASS[J].Chinese Journal of Geology,1984,0(2):173-185. |
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| Authors: | Huang Jianan Wang Sijing |
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| Institution: | Institute of Geology, Academia Sinica, Beijing |
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| Abstract: | The deformation of rock mass during excavation is controlled by physical and mechanical properties of rock mass, and the stress state in it. For a circular tunnel buried in the isot-topic, elastic and homogeneous rock mass, in accordance with the positional function obtained by means of three-dimensional elastic finite element calculation, the tunnel deformation may be expressed by linear equations which consist of four factors such as modulus of elasticity(E), principal stresses(Ph, Pv)on the plane perpendicular to the tunnel axis, and the stress(P1)parallel to the tunnel axis. Through solving the regression equation set, the values E, Ph, Pv,and P1 estimated by the least square can be obtained. The main procedures are as follows:1. Determination of the principal stress axis and calculation of the deformation components in the principal stress direction.2. Solution of the regression equation set to obtain the values E, Ph, Pv and P1.3. Checking the marked index(F)and the remainder standard deviation(S)and rejecting the queer points.4. Checking the influence of P1 on the determination of the principal stress directions. If the influence exceeds the permissive limit, then to deduct the influence, and repeat the procedure(1).5. Calculation the viscoelasticity constants G1 and η of rock surounding the tunnel. The results of the regression analysis have the better precision and reflect rock massproperties in wider scope. Using the regression computing programm(in FORTRAN-IV)and the normal positional function, the tunnel deformation analysis becomes easier and more effective. |
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| Keywords: | , |
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