摘要
某水库边界下方进行了平硐开挖工程,为确保平硐开挖后不会对水库产生不利影响,急需对水库边界下方平硐区域的稳定性开展研究。文章采用数值模拟方法,应用Ansys数值模拟软件,选取典型剖面,对水库边界下方平硐区域的稳定性进行了分析。结果表明,平硐开挖后,地表竖直位移沉降值为0.5982cm,沉降位移十分微小,且地表附近浅层岩体沉降均匀,同时,水平向位移也没有发生突变,地表并未受到平硐开挖影响而引起大范围位移沉降突变。同时,平硐开挖并未引起浅层岩体竖直应力与水平向应力发生突变。剪切应力也只对平硐开挖区域有一定影响。这与位移沉降结果的变化趋势相一致,两者相互验证,进一步验证了结果的准确性。综上所述,平硐开挖不会对上部水库边界造成不利影响。
A flat tunnel excavation project was carried out under the boundary of a reservoir.In order to ensure that the flat tunnel will not have an adverse impact on the reservoir after the excavation of the flat tunnel,it is urgent to conduct research on the stability of the flat tunnel area below the reservoir boundary.In this paper,numerical simulation methods are used to analyze the stability of the flat tunnel area below the reservoir boundary.The results show that after the excavation of the flat tunnel,the vertical settlement displacement of the ground surface is 0.5982cm,the settlement displacement is very small,and the shallow rock mass near the surface is settled evenly,and at the same time,there is no sudden change in the horizontal displacement.The surface is not affected by the flat tunnel.At the same time,the excavation of the flat tunnel did not cause a sudden change in the vertical stress and horizontal stress of the shallow rock mass.Shear stress also only has a certain effect on the excavation area of the flat tunnel.This is consistent with the change trend of the displacement and settlement results.The two verify each other,further verifying the accuracy of the results.In summary,the excavation of the flat tunnel will not adversely affect the upper reservoir boundary.
出处
《科技创新与应用》
2021年第4期67-69,74,共4页
Technology Innovation and Application
关键词
某水库
平硐
稳定性
reservoir
flat tunnel
stability
