杨林隧道岩溶涌水成因分析及处治设计方案研究

Analysis on Causes of Karst Gushing Water and Study on Design of Treatment Programs in Yanglin Tunnel

结合杨林隧道右幅K19+903部位在典型富水岩溶发育、断层等复杂地质条件下发生涌水事件,针对隧道岩溶地区季节交替带的涌水特征,依据隧道勘察报告及实地踏勘分析涌水成因,采取超前地质预报地质雷达与实际开挖导洞相结合的方法对岩溶发育及地下水分布进行基本探明;在满足以上前提条件下,综合项目施工现场情况及施工实践经验确定处治方案,提出"洞内处理、近堵远排、分级泄压"一种新的动态处治设计思路,详细阐述了对该部位溶洞处理采取的主要处治设计措施。

With the event of gushing water in the right part K19+903 of Yanglin Tunnel under the complex geological conditions such as typical water-rich karst development and fault,this paperbasically explored the karst development and groundwater distribution by the method of combining advanced geological prediction geological radar with actual excavation pilot,which was based on the tunnel in karst areas with seasonal water gushing features and the tunnel survey report and field survey analysis of the cause of water gushing.Under the premise of meeting the above conditions,the treatment plan was determined based on the situation of the construction site and the construction practice of the project,and a new dynamic treatment design idea of "treatment in the cave,near plugging and distant drainage,grading pressure relief"was put forward.The main design measures for treating the karst cave in this part were described in detail.