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首页> 外文会议>International UDEC/3DEC Symposium on Numerical Modeling of Discrete Materials in Geotechnical Engineering, Civil Engineering, and Earth Sciences; 20040929-1001; Bochum(DE) >A study on the deformation of the lining of a circular tunnel according to the variation of ground condition
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A study on the deformation of the lining of a circular tunnel according to the variation of ground condition

机译：圆形隧道衬砌随地面条件变化的变形研究

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摘要

For an efficient and reliable evaluation of tunnel safety, it is necessary to understand the relationship between the ground condition involving discontinuity and the deformation pattern of the tunnel lining. In this study, the relationship between the ground condition and the deformation pattern is investigated by model tests in the laboratory and numerical analysis including the variables for discontinuity and stress condition. In the laboratory test, stress and displacement are observed with varying joint angle and stress condition through equipment in the size of 3 m x 3 m x 0.3 m. The angles of joint are varied with 0°, 30°, 45°, 60° and 90° and the ratio of the average horizontal stress to vertical stress (K) are 0.5,1.0,2.0 and 3.0. Using UDEC, DEM is carried out in the same condition and compared with the test results.The test shows that the characteristic patterns of the deformation of the tunnel lining can be related to the conditions of discontinuity and stress. Technical guides and tips for safety evaluation of the tunnels in service are drawn based on the results of the study, and the weak points of the tunnel which need an intensive observation during tunnel maintenance are also suggested.
机译：为了有效，可靠地评估隧道安全性，有必要了解涉及不连续性的地面状况与隧道衬砌变形模式之间的关系。在这项研究中，通过实验室中的模型测试以及包括不连续性和应力条件变量在内的数值分析，研究了地面条件与变形模式之间的关系。在实验室测试中，通过尺寸为3 m x 3 m x 0.3 m的设备，通过改变关节角度和应力条件观察到应力和位移。接头角度随0°，30°，45°，60°和90°而变化，平均水平应力与垂直应力之比（K）为0.5、1.0、2.0和3.0。使用UDEC，在相同条件下进行DEM并与测试结果进行比较。测试表明，隧道衬砌变形的特征模式可能与不连续性和应力条件有关。根据研究结果，得出了在役隧道安全性评估的技术指南和技巧，并提出了在隧道维护期间需要深入观察的隧道薄弱点。

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