基于三维随机裂隙网络的坝基多孔分序灌浆数值模拟

摘要

大坝基岩内节理裂隙数量众多、分布随机性强.针对裂隙灌浆数值模拟研究现状,在耦合多孔的三维随机裂隙网络岩体灌浆模型的基础上,提出了多孔分序灌浆实现方法,并结合实际工程,进行了考虑隙宽随机分布的裂隙灌浆数值模拟研究,分析了灌浆孔序对浆液扩散压力场和单宽流量的影响规律.通过模拟灌浆量和灌浆时间与实际值的对比分析,验证了该方法的可靠性.%The number of joint fractures in dam bedrock is large and its distribution is wildly random.Aiming at the research status of grouting numerical simulation in fractured rock mass,the method of sequence grouting is proposed based on threedimensional stochastic fractured network grouting model coupled with multi-hole,and the numerical simulation of fractured rock mass grouting with the consideration of fracture aperture random distributions is carried out for practical engineering.The influences of grouting sequence on slurry diffusion pressure field and discharge per unit width are studied.The reliability o f the method is verified by comparing the simulation values of grouting quantity and time with actual values.