摘要
隧道工程涌水通常会造成严重后果,不仅对隧道正常施工产生影响,而且会威胁隧道建成后的安全运营。为防止这类工程灾害的发生,此文以张家湾隧道工程为例,基于该段地质情况,通过建立水流流量渗流理论模型,对泥质砂岩进行渗流试验,结果发现水压梯度增大时渗流速度增大,并从线性达西流向非达西流转变。而且随着围压的降低也会造成渗流速度的增大。
Tunnel gushing water usually has serious consequences. It not only affects the normal construction,but also threatens safe operation after completion of the tunnel. To prevent this kind of engineering disasters,the seepage test of shaly sandstone is carried out by establishing theoretical model of flow and seepage based on the geological condition of Zhangjiawan Tunnel Engineering. It is found that the seepage velocity increases with the increase of water pressure gradient and transform from linear Darcy to non Darcy flow. And the seepage velocity will also increase with the decrease of confining pressure.
出处
《铁路工程技术与经济》
2017年第5期1-4,共4页
Railway Engineering Technology and Economy
关键词
隧道工程
涌水机理
渗流模型
研究
Tunnel engineering
Water gushing mechanism
Seepage model
Study
