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渗流是导致渠道下沉、倾斜、断裂等诸多不良后果的重要因素,对渠道安全稳定运行危害较大.基于NURBS-TIN-BRep混合数据结构,构建南水北调中线工程某渠段的工程地质信息三维可视化模型,运用耦合VOF(volume of fluid,流体体积函数)法的N-S(NavierStokes)方程,对研究区域进行渗流模拟,并采用流固耦合进行渠道稳定性计算,全面分析渠道在渗漏、下伏采空区等多种因素影响下的应力及位移状态.结果表明:渠道渗流对其稳定性影响较大,特别是对位移场的影响较为明显,渠道渗流将导致其自身产生相对较大的沉降,因此建议在实际施工过程中进行渠道的局部加固,并采取有效地渗流控制措施.
Seepage flow is an important factor leading to many adverse consequences such as sinking, tilting and rupture of channel, which is more harmful to the safe and stable operation of the channel.Based on the NURBS-TIN-BRep mixed data structure, a three-dimensional visualization of engineering geological information is constructed for a canal of the middle route of South-to-North Water Diversion Project Model, a NS (NavierStokes) equation coupled with volume of fluid (VOF) method is used to simulate the seepage in the study area and calculate the channel stability by means of fluid-structure interaction. The comprehensive analysis of channel leakage, Space and other factors.The results show that channel seepage has great influence on its stability, especially on the displacement field, channel seepage will lead to its own relatively large settlement, Therefore, it is suggested that the local reinforcement of the canal should be carried out in the actual construction process and effective seepage control measures should be taken.