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工程地质是隧道工程的基础。在隧道勘测设计中,通过各种手段,查明隧道工程地质情况,选出合理的洞位及洞口,乃是多快好省地修建隧道的重要前提。隧道工程就地质而言,可分为一般地质及特殊地质。前者对隧道工程影响较小,后者对隧道工程影响很大。所以,隧道地质工作的重点,应着重于特殊地质。本文就国内外特殊地质对隧道工程的危害,浅谈工程地质与隧道的关系。不妥之处,请批评指正。一、河岸阶地在河流中,由于地层隆起,致使河流侵蚀,下切力增大,从而形成了新的峡谷。旧河床高出新河床,旧河床面被碎石或砂砾层所堆积,呈平坦状,称之阶地(图1)。阶地地层松散易坍,当隧道穿过该层时,易引起坍塌或地面沉陷。因此,在洞位选择中,应尽量绕
Engineering geology is the foundation of tunnel engineering. In the tunnel survey and design, through various means to identify the geological conditions of the tunnel project, to select a reasonable hole and hole, is an important prerequisite for building tunnels more quickly and economically. Tunnel engineering in terms of geology, can be divided into general geology and special geology. The former has a small impact on the tunnel project, which has a great impact on the tunnel project. Therefore, the focus of tunnel geological work should focus on special geology. This article on the special geological hazards at home and abroad on the tunnel project, on the relationship between engineering geology and tunnels. Improper, please criticize correction. First, the river terrace in the river, due to the formation of uplift, resulting in river erosion, undercutting increases, thus forming a new canyon. The old riverbed rises above the new riverbed, and the old riverbed is covered with gravel or gravel, flattened and terraced (Fig. 1). Stratum loose easily collapse, when the tunnel through the layer, easy to cause collapse or ground subsidence. Therefore, in the hole selection, should try to around