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基于随机介质理论模型,对地下工程开挖引起岩层和地表移动规律进行了分析.认为地下工程开挖引起岩层颗粒运动符合随机介质运动规律,提出了地下工程开挖地表沉陷三维计算模型,并以冶勒水电站地下厂房开挖所引起地表沉陷特征进行了具体分析,并将计算结果与实际观测数据进行对比分析,表明水平移动位移、变形均较小.又因地下厂房开挖较深,水平移动规律不如上层塌陷明显,且地表最大观测沉降值约为200mm,而最大计算值约为370mm;在地下厂房顶部,最大观测沉降值约为400mm,最大计算值约为440mm.最大水平移动计算值为100mm.数值计算的结论较为精确、可靠,显示出分层影响传递规律,并最终影响到地表.
Based on the stochastic medium theory model, the rule of rock movement and surface movement caused by excavation of underground engineering is analyzed.It is considered that the particle movement of rock mass is in accordance with the law of random medium movement, and the three-dimensional calculation model of surface subsidence induced by underground engineering is proposed. The characteristics of surface subsidence caused by the excavation of the underground powerhouse at Yele Hydropower Station are analyzed in detail, and the comparison between the calculated results and the actual observation data shows that horizontal displacement and deformation are small, and because of the deep underground excavation and horizontal movement The law is not as obvious as the collapse of the upper layer, and the maximum observed surface sediment value is about 200mm, and the maximum calculated value is about 370mm. At the top of the underground plant, the maximum observed settlement value is about 400mm and the maximum calculated value is about 440mm. 100mm.The conclusion of numerical calculation is more accurate and reliable, showing the law of transfer of stratified influence and finally affecting the surface.