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- 2017
基于单元重构与节点分离的大型地下洞室软弱结构面模拟方法Abstract: 针对在大型地下洞室中软弱结构面难以合理模拟的问题,通过引进“单元重构-节点分离”思想,提出了新的非连续软弱结构面模拟方法.将该方法用于实际地下厂房模型中并模拟出非连续结构面,并将该重构模型导入计算程序,与常规连续有限元模型的计算结果进行对比.结果表明,重构模型能够用于数值计算,计算结果在非连续结构面附近呈现非连续性,且计算结果所反映的规律与所认识规律基本一致,能够反映真实的结构面赋存状态.因此,该软弱结构面建模方法实现了结构面的非连续化,为大型地下洞室的复杂地质非连续结构面模拟提供了新的实现途径.As weak structural planes are difficult to be simulated reasonably in large underground chamber, “element reconstruction and node separation” was introduced, and the new simulation methodology of discontinuous weak structural planes was proposed in this study. The proposed methodology was used in the actual numerical model of underground powerhouse to simulate the discontinuous weak structural planes. The reconstructed model was then imported into calculation program, and the result was compared with the prediction by conventional continuous finite element model. The comparison shows that the reconstructed model can be used in the numerical calculation, and the discontinuity feature is presented near the discontinuous structural planes. Moreover, the rules in the calculation results are consistent with the general rules, which can describe the actual occurrence mode of the structural planes. Therefore, the simulation methodology of discontinuous weak structural planes achieves the transformation into the discontinuity of the structural planes, and it provides a new way for the simulation of complex geological discontinuous weak structural planes in large underground chamber.
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