基于FLAC^(3D)的采空区注浆加固数值模拟研究

Numerical Simulation for Grouting Reinforcement in Goaf Based on FLAC^(3D)

采空区结构复杂,易受外界因素影响发生失稳变形,在其上方兴建建筑物时为确保安全必须进行地基稳定性评价,根据评价结果采取相应的处理措施。由大量国内外工程实践可知,注浆是改良软弱地层和破碎地基的有效方法,是保证地下工程和地面建筑物安全运行的可靠手段。对采空区注浆加固机理、加固模型以及数值模拟中应注意的问题进行了较深入的分析,并以实测工程参数为依据,结合FLAC3D软件,从沉降变形、垂向应力的角度对采空区注浆加固问题进行了分析研究,为相关问题的施工与设计提供一定的借鉴。

The goaf which has a complex structure was easily affected by external factors. In order to ensure the safety, the foundation stability must be evaluated before construction. And then according to the evaluation results, the corresponding measures are adopted. By a large number of domestic and foreign engineering practice, We can see that grouting is not only an effective method for improving soft ground and broken ground but also a reliable measure of safe operation of underground engineering and ground buildings. The problem of grouting reinforcement mechanism, model and numerical simulation are analyzed. Combine with FLAC3 D, the problems of goaf grouting reinforcement are analyzed and researched through the settlement and vertical stress by the actual engineering parameters. A reference is provided for the relate construction and design.