覆盖层地基注浆扩散数值模拟方法及应用

Numerical Simulation Method of Grouting Diffusion for Foundation with Overburden and Its Application

注浆处理是覆盖层地基提高承载力和抗渗能力的有效手段之一。由于岩土介质的不透明特性,浆液在岩土介质中的扩散过程通常难以直观把握,有必要开展数值模拟分析。基于浆液的层流运动和渗透扩散理论,建立了注浆扩散数值分析控制方程,结合前人的研究成果开展了算例分析,验证了注浆扩散数值模拟分析方法的可行性和有效应。结合具体工程针对设计灌浆方案进行注浆扩散的数值模拟的工程应用分析,结果表明依据设计方案注浆所形成的灌浆帷幕密实性好、厚度均匀,注浆扩散数值模拟分析方法具有较好的工程适用性,分析结果能为实际工程提供有益参考。

Grouting treatment is one of the effective methods to improve bearing capacity and anti-permeability of foundation with overburden. Because of the opacity,it is often difficult to visually understand diffusion course of the grout in soil and rock medium,and hence numerical simulation analysis is needed. Based on laminar motion and penetrative diffusion theory of the grout,the control equation of numerical analysis about grouting diffusion is constructed. With reference to the previous research results,a typical example is adopted and availability of the numerical simulation method of grouting diffusion is also verified. The engineering application analysis is applied to the design plan of a practical engineering,and the results for numerical simulation of grouting diffusion indicate the modeling grouting curtain based on design plan is with good compactibility and uniform thickness. So the numerical simulation method of grouting diffusion is engineering applicable and can provide helpful guidance for the practical engineering.