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Study on Analog Theory of Rock Mass Simulation and Its Engineering Application

机译：岩体模拟的模拟理论研究及其工程应用

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摘要

During construction of 3D geological models, it is difficult to determine the uniform between geological model and true model. As a comprehensive index, rock quality designation (RQD) is reliable to assess the rationality of geological models. Unfortunately, The RQD of rockmass is determined completely by the deterministic threshold value and directions of the scan lines presently. To avoid this drawback, the modified method of the RQD value based on the threshold value and 3D space is proposed in this paper. Simultaneously, the analogue-simulation method based on rupture mechanism and classification of discontinuities is proposed. The elliptical discontinuity is considered for general discontinuity, and the special discontinuities, such as bedding, fault, and interlayer are dealt with individually. The accuracy of the 3D model is verified by the modified RQD. The 3D model of the rockmass is analogue simulated through repetitively obtaining data from the interval confidence of geometrical parameters of discontinuities, which are determined by a mass of data derived from field investigation. Besides, the dam base of the Xiangjiaba hydropower station is taken as an example, and the 3D model of the dam base is analog-simulated; its stability is evaluated by DDA method. The safety coefficient of the dam base is obtained by utilizing the overload method.
机译：在3D地质模型的构建过程中，很难确定地质模型与真实模型之间的一致性。作为一种综合指标，岩石质量指定（RQD）可可靠地评估地质模型的合理性。不幸的是，岩体的RQD目前完全由确定性阈值和扫描线的方向确定。为了避免这种缺陷，本文提出了一种基于阈值和3D空间的RQD值修改方法。同时，提出了一种基于断裂机理和不连续性分类的模拟方法。椭圆形不连续性被认为是一般性不连续性，特殊不连续性（例如，层理，断层和夹层）则单独处理。修改后的RQD验证了3D模型的准确性。岩石质量的3D模型是通过从不连续性几何参数的区间置信度中重复获取数据来模拟得到的，该参数由现场调查得出的大量数据确定。另外，以向家坝水电站坝基为例，对坝基3D模型进行了模拟仿真。用DDA法评价其稳定性。坝基的安全系数是利用过载法获得的。

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  • 来源
    《Mathematical Problems in Engineering》 |2013年第14期|491069.1-491069.11|共11页
  • 作者

    Sun Shaorui; Lu Yexu; Xu Yuanyuan; Liu Jin; Wei Jihong;

  • 作者单位

    College of Earth Science and Engineering, Hohai University, Nanjing 210098, China;

    College of Earth Science and Engineering, Hohai University, Nanjing 210098, China;

    College of Earth Science and Engineering, Hohai University, Nanjing 210098, China;

    College of Earth Science and Engineering, Hohai University, Nanjing 210098, China;

    College of Earth Science and Engineering, Hohai University, Nanjing 210098, China;

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