山岭隧道地下水限量排放方案参数研究

Study on Parameters of Groundwater Limited Discharge Scheme in Mountain Tunnel

对于山岭隧道,综合考虑环境与成本的影响,采用限制性防排水措施最为合理。限制性防排水的设计需依据对隧道工程涌水量的预测,影响其效果的关键因素之一便是地下水的限量排放方案。地下水的限量排放由排水、堵水措施来实现,所以需要对排水量及注浆参数进行研究。结合小北山1#隧道水文试验情况,采用降雨入渗法和稳定流理论公式法对其涌水量进行预测,并依据涌水量预测值来研究隧道限制性防排水的相关参数合理取值。

Taking into account the impact of environment and cost for mountain tunnels,it is most reasonable to adopt restrictive drainage measures.The design of restrictive drainage should be based on the predicted value of water inflow in the tunnel project while one of the key factors affecting its effectiveness is the limited discharge scheme for groundwater.The limited discharge scheme of groundwater is realized by drainage and plugging measures,so it is necessary to study the displacement and grouting parameters.Combined with the hydrological test of#1 Xiaobeishan tunnel,the rainfall infiltration method and the steady flow theory formula method are used to predict the water inflow,and the reasonable parameters of the restricted drainage of the tunnel are studied according to the predicted value of water inflow.